HomeMy WebLinkAboutE-7 Staff Report - Authorization to Solicit Bids for Police Station HVAC Replacement Project CONSENT ITEM
E-7
TO: HONORABLE MAYOR AND MEMBERS OF THE CITY COUNCIL
VIA: SERGIO GONZALEZ, CITY MANAGER
FROM: DANIEL BOBADILLA, P.E., DIRECTOR OF PUBLIC WORKS/CITY ENGINEER
DATE: MAY 6, 2019
SUBJECT: APPROVE THE PLANS AND SPECIFICATIONS AND AUTHORIZE STAFF TO
SOLICIT BIDS FOR THE POLICE FACILITY HVAC REPLACEMENT PROJECT
BACKGROUND:
The City of Azusa Police Facility HVAC mechanical systems were modernized as part of a 1996 Police
Facility addition and alteration project. At this point the system is over 20 years old and in excess of the
expected 20-year life cycle. Lack of performance and high maintenance costs require replacement of a
significant amount of the existing equipment.
RECOMMENDATION:
Staff recommends the City Council take the following actions:
1) Approve the project plans and specifications; and
2) Authorize Staff to solicit a Notice of Inviting Bids for the Police Facility HVAC Replacement
Project.
ANALYSIS:
The existing Police Facility is currently served by an existing HVAC system installed in 1996 as part of
an alteration/addition project. The system is over 20 years old and has reached the end of its useful life.
A significant amount of the equipment is in need of replacement. All controls throughout the Facility are
in very poor condition and many of the existing thermostats do not function at this time resulting in units
being unable to maintain temperature control.
Analysis of the current system resulted in recommendation to replace like for like in terms of system
configuration and installation; however the system itself will be a significant upgrade. The suggested
new air-handling units will be configured to operate like a multizone unit using Variable Refrigerant
Volume system equipment and controls known for high efficiency operations. This is a common
Police Facility HVAC Replacement Project
May 6, 2019
Page 2
existing multizone type unit upgrade that allows for better temperature control and overall system
efficiency.
If approved by the City Council, Staff will solicit bids from qualified contractors. Staff will review
submitted bids and request approval from the City Council to award a contract at a future meeting.
Construction is anticipated to commence June/July 2019.
FISCAL IMPACT:
There is no fiscal impact associated with the recommendation actions.
Prepared by: Reviewed and Approved:
Nikki Rosales Daniel Bobadilla, P.E.
Senior Management Analyst Director of Public Works/City Engineer
Reviewed and Approved:
Sergio Gonzalez
City Manager
Attachment:
1) Project Plans and Specifications
TITLESHEETT-0.1ENGINEER:ARCHITECT:CHECK:DRAWN:DATE:JOB NO:DescriptionRev. DateSHEET NO:SHEET DESCRIPTION:STATE:STAMPNo.PROJECT NAME:STAMPCONSULTANTCITY OF AZUSA
POLICE FACILITY ADDITION AND ALTERATION (714) 693-22775200 E. La Palma AveTelephoneConsulting EngineersAnaheim, CA 92807OED58006003-06-2019SHEET NO:STATE:KCRW725 N. ALAMEDA AVE, AZUSA,
CALIFORNIA 91702ISSUED FOR CONSTRUCTION
ENGINEER:ARCHITECT:CHECK:DRAWN:DATE:JOB NO:DescriptionRev. DateSHEET NO:SHEET DESCRIPTION:STATE:STAMPNo.PROJECT NAME:STAMPCONSULTANTCITY OF AZUSA
POLICE FACILITY ADDITION AND ALTERATION (714) 693-22775200 E. La Palma AveTelephoneConsulting EngineersAnaheim, CA 92807OED58006003-06-2019SHEET NO:STATE:KCRW725 N. ALAMEDA AVE, AZUSA,
CALIFORNIA 91702ISSUED FOR CONSTRUCTIONMECHANICALGENERALNOTES, LEGENDAND SCHEDULESM-0.1
ENGINEER:ARCHITECT:CHECK:DRAWN:DATE:JOB NO:DescriptionRev. DateSHEET NO:SHEET DESCRIPTION:STATE:STAMPNo.PROJECT NAME:STAMPCONSULTANTCITY OF AZUSA
POLICE FACILITY ADDITION AND ALTERATION (714) 693-22775200 E. La Palma AveTelephoneConsulting EngineersAnaheim, CA 92807OED58006003-06-2019SHEET NO:STATE:KCRW725 N. ALAMEDA AVE, AZUSA,
CALIFORNIA 91702ISSUED FOR CONSTRUCTIONMECHANICALSCHEDULESM-0.2
FANROOMB26STORAGEMECHANICALEQUIPMENTFANROOMB26STORAGEMECHANICALEQUIPMENTENGINEER:ARCHITECT:CHECK:DRAWN:DATE:JOB NO:DescriptionRev. DateSHEET NO:SHEET DESCRIPTION:STATE:STAMPNo.PROJECT NAME:STAMPCONSULTANTCITY OF AZUSA
POLICE FACILITY ADDITION AND ALTERATION (714) 693-22775200 E. La Palma AveTelephoneConsulting EngineersAnaheim, CA 92807OED58006003-06-2019SHEET NO:STATE:KCRW725 N. ALAMEDA AVE, AZUSA,
CALIFORNIA 91702ISSUED FOR CONSTRUCTIONMECHANICALDEMOLITIONREMODELFLOOR PLANM-2.1
ENGINEER:ARCHITECT:CHECK:DRAWN:DATE:JOB NO:DescriptionRev. DateSHEET NO:SHEET DESCRIPTION:STATE:STAMPNo.PROJECT NAME:STAMPCONSULTANTCITY OF AZUSA
POLICE FACILITY ADDITION AND ALTERATION (714) 693-22775200 E. La Palma AveTelephoneConsulting EngineersAnaheim, CA 92807OED58006003-06-2019SHEET NO:STATE:KCRW725 N. ALAMEDA AVE, AZUSA,
CALIFORNIA 91702ISSUED FOR CONSTRUCTIONMECHANICALDEMOLITIONREMODELROOF PLANM-3.1
ENGINEER:ARCHITECT:CHECK:DRAWN:DATE:JOB NO:DescriptionRev. DateSHEET NO:SHEET DESCRIPTION:STATE:STAMPNo.PROJECT NAME:STAMPCONSULTANTCITY OF AZUSA
POLICE FACILITY ADDITION AND ALTERATION (714) 693-22775200 E. La Palma AveTelephoneConsulting EngineersAnaheim, CA 92807OED58006003-06-2019SHEET NO:STATE:KCRW725 N. ALAMEDA AVE, AZUSA,
CALIFORNIA 91702ISSUED FOR CONSTRUCTIONMECHANICALDETAILSM-4.1-
ENGINEER:ARCHITECT:CHECK:DRAWN:DATE:JOB NO:DescriptionRev. DateSHEET NO:SHEET DESCRIPTION:STATE:STAMPNo.PROJECT NAME:STAMPCONSULTANTCITY OF AZUSA
POLICE FACILITY ADDITION AND ALTERATION (714) 693-22775200 E. La Palma AveTelephoneConsulting EngineersAnaheim, CA 92807OED58006003-06-2019SHEET NO:STATE:KCRW725 N. ALAMEDA AVE, AZUSA,
CALIFORNIA 91702ISSUED FOR CONSTRUCTIONMECHANICALDETAILSM-4.22M4.2EMBEDEMBED
#4 DOWEL AT HOUSEKEEPINGPAD CORNER & @ 32" OCAROUND PERIMETER w/ 8"HOOK, DRILL & EPOXY w/SIMPSON 'SET-XP' w/ 2.3/8"EMBED (ICC ESR-2508)(E) 4" SLAB ON GRADE(E) 4"
THICK
1.1/2"CLR8" MINSIMPSON 'STRONGBOLT 2' 3/4" Ø x 5.1/2"NOM EMBED, (1) EA CORNER IN HOLESPROVIDED. (ICC ESR-3037)NEW HOUSEKEEPING PADTO MATCH (E) THICKNESSw/ #3 @ 16" OC EW MID-DEPTHCHILLERUNIT LEGDRILL & EPOXY w/ SIMPSON'SET-XP' w/ 4" EMBED (ICCESR-2508)(E) 4" THICKHOUSEKEEPING PADNOTES:1.DRILL HOLES 1/8" OVERSIZED.2.CLEAR HOLES OF DUST & DEBRIS.3.ENSURE EMBEDDED REBAR IS NOT DAMAGED (GPR).4.CONTINUOUS SPECIAL INSPECTION IS REQUIRED.5.CHILLER UNIT LEG ANCHORAGE MAY BE ON (E) PAD AS WELL.EMBED VIBREX 'ICPG-EQ' 3/4"THICK ISOCUBE PAD
ENGINEER:ARCHITECT:CHECK:DRAWN:DATE:JOB NO:DescriptionRev. DateSHEET NO:SHEET DESCRIPTION:STATE:STAMPNo.PROJECT NAME:STAMPCONSULTANTCITY OF AZUSA
POLICE FACILITY ADDITION AND ALTERATION (714) 693-22775200 E. La Palma AveTelephoneConsulting EngineersAnaheim, CA 92807OED58006003-06-2019SHEET NO:STATE:KCRW725 N. ALAMEDA AVE, AZUSA,
CALIFORNIA 91702ISSUED FOR CONSTRUCTIONMECHANICALWIRINGDIAGRAMSM-4.3
ENGINEER:ARCHITECT:CHECK:DRAWN:DATE:JOB NO:DescriptionRev. DateSHEET NO:SHEET DESCRIPTION:STATE:STAMPNo.PROJECT NAME:STAMPCONSULTANTCITY OF AZUSA
POLICE FACILITY ADDITION AND ALTERATION (714) 693-22775200 E. La Palma AveTelephoneConsulting EngineersAnaheim, CA 92807OED58006003-06-2019SHEET NO:STATE:KCRW725 N. ALAMEDA AVE, AZUSA,
CALIFORNIA 91702ISSUED FOR CONSTRUCTIONMECHANICALWIRING ANDCONTROLSDIAGRAMSM-4.4
ENGINEER:ARCHITECT:CHECK:DRAWN:DATE:JOB NO:DescriptionRev. DateSHEET NO:SHEET DESCRIPTION:STATE:STAMPNo.PROJECT NAME:STAMPCONSULTANTCITY OF AZUSA
POLICE FACILITY ADDITION AND ALTERATION (714) 693-22775200 E. La Palma AveTelephoneConsulting EngineersAnaheim, CA 92807OED58006003-06-2019SHEET NO:STATE:KCRW725 N. ALAMEDA AVE, AZUSA,
CALIFORNIA 91702ISSUED FOR CONSTRUCTIONMECHANICALTITLE 24REPORTSM-6.1
ELECTRICALGENERAL NOTESAND LEGENDSE-0.1ELECTRICALSHEET LISTSheet NumberSheet TitleLEGENDGENERAL NOTESSEISMIC NOTESAPPLICABLE CODES AND STANDARDSB.EXISTING CONDITIONS3.4.6.5.8.7.9.1.2.2.1.3.4.3.4.6.5.7.2.1.8.9.10.11.13.14.15.16.17.18.19.20.21.22.23.24.25.26.27.28.1.2.3.4.5.6.7.8.E.ABBREVIATIONS12.9.ENGINEER:ARCHITECT:CHECK:DRAWN:DATE:JOB NO:DescriptionRev. DateSHEET NO:SHEET DESCRIPTION:STATE:STAMPNo.PROJECT NAME:STAMPCONSULTANTCITY OF AZUSA
POLICE FACILITY ADDITION AND ALTERATIONOED58006003-06-2019SHEET NO:STATE:SMMJ725 N. ALAMEDA AVE, AZUSA,
CALIFORNIA 91702 (415) 734-77452600 10th Street #500Telephone:Consulting EngineersBerkeley, CA 94710E:\STAMPSIGNED.pngISSUED FOR CONSTRUCTION
ELECTRICALSINGLE LINEE-0.2ENGINEER:ARCHITECT:CHECK:DRAWN:DATE:JOB NO:DescriptionRev. DateSHEET NO:SHEET DESCRIPTION:STATE:STAMPNo.PROJECT NAME:STAMPCONSULTANTCITY OF AZUSA
POLICE FACILITY ADDITION AND ALTERATIONOED58006003-06-2019SHEET NO:STATE:SMMJ725 N. ALAMEDA AVE, AZUSA,
CALIFORNIA 91702 (415) 734-77452600 10th Street #500Telephone:Consulting EngineersBerkeley, CA 94710E:\STAMPSIGNED.pngISSUED FOR CONSTRUCTION
ENGINEER:ARCHITECT:CHECK:DRAWN:DATE:JOB NO:DescriptionRev. DateSHEET NO:SHEET DESCRIPTION:STATE:STAMPNo.PROJECT NAME:STAMPCONSULTANTCITY OF AZUSA
POLICE FACILITY ADDITION AND ALTERATIONOED58006003-06-2019SHEET NO:STATE:SMMJ725 N. ALAMEDA AVE, AZUSA,
CALIFORNIA 91702 (415) 734-77452600 10th Street #500Telephone:Consulting EngineersBerkeley, CA 9471060ISSUED FOR CONSTRUCTION
FANROOMB26EMERGENCYGENERATOR B24MECHANICALEQUIPMENTSTAIR B1FANROOMB26EMERGENCYGENERATOR B24MECHANICALEQUIPMENTSTAIR B1ENGINEER:ARCHITECT:CHECK:DRAWN:DATE:JOB NO:DescriptionRev. DateSHEET NO:SHEET DESCRIPTION:STATE:STAMPNo.PROJECT NAME:STAMPCONSULTANTCITY OF AZUSA
POLICE FACILITY ADDITION AND ALTERATIONOED58006003-06-2019SHEET NO:STATE:SMMJ725 N. ALAMEDA AVE, AZUSA,
CALIFORNIA 91702 (415) 734-77452600 10th Street #500Telephone:Consulting EngineersBerkeley, CA 94710ELECTRICALDEMOLITION &REMODELFLOOR PLANE-2.1ISSUED FOR CONSTRUCTION
ENGINEER:ARCHITECT:CHECK:DRAWN:DATE:JOB NO:DescriptionRev. DateSHEET NO:SHEET DESCRIPTION:STATE:STAMPNo.PROJECT NAME:STAMPCONSULTANTCITY OF AZUSA
POLICE FACILITY ADDITION AND ALTERATIONOED58006003-06-2019SHEET NO:STATE:SMMJ725 N. ALAMEDA AVE, AZUSA,
CALIFORNIA 91702 (415) 734-77452600 10th Street #500Telephone:Consulting EngineersBerkeley, CA 94710ELECTRICALDEMOLITION &REMODELROOF PLANE-3.1ISSUED FOR CONSTRUCTION
725 Alameda Ave. 00 00 05
Azusa, CA 91702 Table of Contents
April 18, 2019
TABLE OF CONTENTS 000005 - [1]
SECTION 00 00 05
TABLE OF CONTENTS
PART 1 - GENERAL
DIVISION 00 – INTRODUCTORY PAGES
000005 Table of Contents……………………………………………………………...1
DIVISION 01 – GENERAL REQUIREMENTS
01 26 00 Requests for Information…………………………………………………..….2
01 32 13 Construction Schedule...…………………………………………………...…6
01 51 00 Construction Facilities and Temporary Controls……………………………4
DIVISION 07 – THERMAL AND MOISTURE PROTECTION
07 62 00 Sheet Metal Flashing and Trim ………………………………………………6
DIVISION 23 – MECHANICAL
23 01 30.51 HVAC Equipment and Duct Cleaning………………………….……………4
23 05 29 Hangers and Supports for HVAC Piping & Equipment…………..………..6
23 05 53 Mechanical Identification……………………………………………………...4
23 05 93 Testing, Adjusting, and Balancing for HVAC……………………………...17
23 07 13 Mechanical DX Piping Insulation ………………………………………......12
23 23 01 AHU Spec……………………………………………………………..….......14
23 30 00 Heating, Ventilating, and Air Conditioning…………………………………13
23 30 01 VRF Condensing Units………………………....……………………...……..7
23 31 00 HVAC Ducts and Casing………..…………………………………………….8
23 33 00 Air Duct Accessories ………….………………………………………...……4
END OF SECTION
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REQUEST FOR INFORMATION 012600 - [1]
SECTION 01 26 00
REQUESTS FOR INFORMATION
PART 1 - GENERAL
1.01 SUMMARY
A. Provisions of the General and Supplementary Conditions and Division One apply to
this section.
B. Section Includes: Procedures for requesting clarification or information about the
intent of the contract documents.
1.02 DEFINITIONS
A. Request for information: A request for information, clarification or interpretation is a
formal means for the Contractor to verify or clarify the intent of the documents.
Requests are presented in writing on a pre-approved form and answered in writing
on the same form. Request is prepared by the Contractor, and submitted to the
Engineer, to request clarifications or interpretations of the intent of the Contract
Documents, or to notify the Engineer of potential conflicts in Contract Documents or
between the Contract Documents and field conditions.
1.03 PROCEDURES FOR REQUESTING INFORMATION
A. The Engineer’s response is an interpretation or clarification of the Contract
Documents. Such request does not authorize changes in the work that impact
Contract Sum or Contract Time.
B. When possible, request such clarification either verbally or in writing at the next
scheduled Project meeting. When the information request is answered at the proj ect
meeting, number the request and enter the response into the meeting minutes.
When the urgency or complexity require more timely communication between
meetings, prepare and submit a formal written information request to the Engineer,
without delay.
C. Submit information requests within a reasonable time frame so as not to impede the
progress of the work.
1. When an answer to an information request has an effect on cost or time,
notify the Engineer in accordance with the Contract Documents. Do not
perform such work until a Change Order has been reviewed by the Engineer
and approved by the Owner.
2. When submitting an information request, indicate the time available for the
Engineer to respond without causing an impact to the Contract Time.
D. W hen a request for information involves clarification of coordination issues, lay out
Contractors’ suggested solutions using scaled sketches, and submit with the
request. If the request is such that choices of several logical solutions are apparent
to the Contractor, include the logical solutions on the form.
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REQUEST FOR INFORMATION 012600 - [2]
E. Information requests may be returned with a stamp or notation "Not Reviewed", if, in
the opinion of the Engineer:
1. The interpretation requested is ambiguous or unclear to the Engineer.
2. The answer is obvious and clear by researching the Contract Documents.
3. The Contractor has not reviewed the request prior to submittal to the Engineer.
4. The Contractor has not offered potential solutions to answer coordination
issues or offered logical solutions.
F. Allow a minimum of 4 days for review and response time, after receipt by the
Engineer. It is the responsibility of the Contractor to verify receipt by the Engineer.
The response time may be increased if:
1. More information is required.
2. The information request is submitted out of sequence.
3. In the opinion of the Engineer, more time is needed to answer the
information requests.
G. Do not use information requests for:
1. Submitting substitutions for consideration.
2. Requesting changes or additions of scope to the work.
3. Requesting “value engineering” cost-saving or time-saving changes.
H. If the Contractor believes that a clarification by the Engineer may result in a change,
Contractor shall not proceed with the work indicated by the request until a change is
approved by the Owner.
1. If the Contractor believes that a clarification by the Engineer results in
additional cost, identify the basis of the Contractor’s bid in the information
requests.
2. Answered information requests shall not be construed as an authorization to
perform extra work.
I. Form: Submit requests in writing on a form approved by Owner.
PART 2 – PRODUCTS – NOT USED
PART 3 - EXECUTION - NOT USED
END OF SECTION
725 N. Alameda Ave. 01 32 13
Azusa, CA 91702 CONSTRUCTION SCHEDULE
April 18, 2019
CONSTRUCTION SCHEDULE 013213 - [1]
SECTION 01 32 13
CONSTRUCTION SCHEDULE
PART 1 - GENERAL
1.01 SUMMARY
A. Provisions of the General and Supplementary Conditions and Division One apply to
this section.
B. Section Includes: Construction Schedule procedures, preparation, submittals,
reviews, updates, and revisions.
1.02 SUBMITTALS
A. Approved Schedule: Submit 6 copies and one reproducible of approved Construction
Schedule, signed by Owner and Contractor.
1.03 PROCEDURES
A. Within 15 days after Award of Contract, but not more than 7 days after Notice to
Proceed, Contractor shall submit, for review, to the Owner, a detailed Construction
Schedule setting forth requirements for complete execution of work. Construction
schedule shall include, but not be limited to specific days, night work, description of
work, anticipated completion date(s), phasing, unit building ‘down time’, mechanical
system start-up and turnover date.
B. The Owner will review and return Contractor's Construction Schedule, with summary
comments, within 7 days. If revisions are required, Contractor shall resubmit
Construction Schedule within 3 days.
C. After approval, changes to Construction Schedule shall not be made unless mutually
agreeable to Owner and Contractor.
D. Include in initial schedule a written summary narrative sufficiently comprehensive to
explain basis of Contractor's approach to work.
E. If a Construction Schedule is considered by the Owner to be in non-compliance with
any requirement of the Contract, Contractor will be notified to review and revise
Construction Schedule and bring it into compliance. Failure of Contractor to submit
a Construction Schedule in full compliance with the Contract may result in a delay in
the processing of progress payments, since Construction Schedule will be used in
evaluating progress for payment approval.
F. Simultaneously with each submittal of Progress Payment Request, Contractor shall
deliver to the Owner an updated Construction Schedule reflecting work progress as
of end of previous reporting period. Each such Construction Schedule shall show
actual progress to date in execution of work, together with a projected schedule for
completion of work. No changes in logic will be permitted unless agreed upon with
Owner.
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CONSTRUCTION SCHEDULE 013213 - [2]
G. Scheduled submittals are subject to review and acceptance by the Owner. The
Owner retains the right to withhold progress payments until Contractor submits a
Construction Schedule acceptable to the Owner.
H. Schedule shall include all required construction meetings (weekly), including
additional meeting as required (kick off, etc.). Final meeting schedule to be
approved by owner’s representative.
1.04 PREPARATION GUIDELINES
A. Construction Schedule shall be prepared using Critical Path Method (CPM) of
scheduling.
B. Construction Schedule shall be computer-based, in a format acceptable to the
Owner. Level of detail indicated in schedule shall be equal to or greater than the
breakdown outlined in Table of Contents of the project manual.
C. Durations and events indicated on schedule shall conform to phasing set forth in the
Contract and shall indicate any area or building within a particular phase. Schedule
shall indicate Contract "milestone events" and other milestones agreed to by the
Owner; no other milestone dates will be accepted unless approved as a change.
D. Construction Schedule shall represent a practical plan to complete work within time
requirements of the Contract.
1. Schedule extending beyond limits of Contract time will not be acceptable.
2. Indicate "float" (plus or minus) in schedule milestone dates.
3. Schedule is subject to approval by the Owner. Revise and resubmit until
approved.
E. Construction schedule shall clearly indicate sequences of construction activities and
specifically indicate:
1. Start and completion of all items of work, their major components, and
interim milestone completion dates as determined by Contractor and Owner.
2. Activities for procurement, delivery, installation of equipment, materials and
other supplies, including:
a. Time for submittals, resubmittals, and reviews. Include decision
dates for selection of finishes.
b. Time for fabrication and delivery of manufactured products for work.
c. Interdependence of procurement and construction activities.
d. Dates for testing and balancing equipment, and final inspection.
F. Schedule shall be in sufficient detail to assure adequate planning and execution of
work.
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CONSTRUCTION SCHEDULE 013213 - [3]
1. Each activity shall range in duration from 1 to 5 workdays, with exception of
fabrication and procurement activities, unless directed otherwise by the
Owner. Activity duration shall be total of actual days required to perform and
complete that activity and shall not include consideration of weather impact
on activity.
2. Schedule shall be cost and resource-loaded with total equal to Contract sum,
and shall include all associated interface activities in the Contract including,
but not limited to, Owner's Maintenance Branch activities and Interim
Housing schedules, which will be provided by the Owner.
3. Schedule shall allow monitoring and evaluation of progress in performance
of work; it shall be time-scaled in precedence diagramming method (PDM),
or arrow diagramming method (ADM).
4. Activities shall include:
a. Description: what is to be accomplished and where.
b. Workday duration.
c. Responsibility code; identifying who performs each individual activity.
5. Network shall show continuous flow from left to right.
6. Identify days per week and shifts per day worked; also, non-work days and
holidays.
7. Identify activities which constitute controlling operations, i.e., milestones or
critical path.
G. Failure to include any element of work required for performance of this Contract shall
not excuse Contractor from completing work required to comply with Contract
Documents and Construction Schedule.
H. Submittal of the Construction Schedule shall be interpreted as Contractor's
confirmation that schedule meets requirements of the Contract Documents, and that
the work will be executed in sequence indicated in schedule.
I. Contractor shall prepare construction only after careful coordination with the Owner,
Probation and the Engineer has been done. Schedule must reflect all suggestions
and recommendations by said parties. Construction phasing shall be executed
consecutively and without period(s) of intermission. Contractor shall prepare his bid
such that no less than ten (10) different phases are included to complete his scope
of work indicated in the project documents. Any alteration or changes to phasing
and/or execution of work must be approved by Probation and the Owner prior to start
of work.
1.05 REVIEWS, UPDATES, AND REVISIONS
A. The Owner will review and return Contractor's Construction Schedule, with summary
comments, within 10 days. If revisions are required, Contractor shall resubmit the
construction schedule within 7 days following receipt of the Owner's comments.
725 N. Alameda Ave. 01 32 13
Azusa, CA 91702 CONSTRUCTION SCHEDULE
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CONSTRUCTION SCHEDULE 013213 - [4]
B. After Contractor and the Owner agree to a final schedule, it will become the Project
Construction Schedule and considered part of the Contract Documents.
C. Construction Schedule Reviews and Updates:
1. Periodically review schedule for:
a. Actual completion dates for work items completed during report
period.
b. Actual commencement dates for work items started during report
period.
c. Estimated remaining duration for work items in progress are always
to be less than original duration, unless modified by change order.
d. Estimated commencement dates for work items scheduled to start
during month following report period.
e. Changes in duration of work items.
f. Identification of current and most crucial critical paths to required
completion dates.
2. In the case of a schedule change, Contractor shall include a narrative report
with the updated progress analysis, which shall include, but not be limited to,
a description of problem areas, current and anticipated delaying factors, and
any proposed revisions for a recovery plan.
3. Change Orders affecting schedule shall be clearly identified as separate,
new activities.
4. Review of Construction Schedule shall not relieve Contractor of the
responsibility for accomplishing work in accordance with the Contract
Documents.
D. Updates: Contractor shall submit to the Owner, with each monthly payment
application, an up-to-date Construction Schedule to include following:
1. Work Item Report: Detailing work items and dependencies as indicated on
network diagram, listed in order of ascending work item number.
2. Separate listing of activities completed during reporting period.
3. Separate listing of activities which are currently in progress, indicating their
remaining duration and percentages completed.
4. Separate listing of activities which are causing delay in work progress.
5. All reports shall be arranged based on appropriate phasing, areas within a
phase, or broken down by building or facility.
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6. Narrative report to define problem areas, anticipated delays, and impact on
Construction Schedule. Report corrective action taken, or proposed, and its
effect, including effect of changes on schedules of individual contractors.
7. Resolution of conflict between actual work progress and schedule logic:
when out-of-sequence activities develop in schedule because of actual
construction progress, Contractor shall submit a revised schedule to
conform to current job sequence and direction.
E. If, according to current updated Construction Schedule, the Owner determines
Contractor is behind the Contract completion date or any interim milestone
completion dates and taking into account time extensions to which Contractor is
entitled, Contractor shall submit a revised schedule, indicating a workable plan and a
narrative description to complete project on time.
1. The Owner may withhold progress payments until schedule changes are
approved.
F. Scheduling of change or extra work orders is responsibility of Contractor.
1. Contractor shall revise Construction Schedule to incorporate all activities
involved in completing change orders, or extra work orders, and submit it to
the Owner for review.
G. If the Owner finds Contractor is entitled to extension of any completion date under
provisions of the Contract, the Owner's determination of total number of days
extension will be based upon current analysis of Construction Schedule and upon
data relevant to extension.
H. Contractor acknowledges and agrees that delays to non-critical activities (those with
"float") will not be considered a basis for a time extension unless activities become
critical. Non-critical activities are those activities which, when delayed, do not affect
an interim or final Contract completion date.
I. Any claim for extension of time shall be made in writing to the Owner not more than
24 hours after commencement of delay; otherwise, it shall be deemed finally waived
for all purposes. Contractor shall provide an estimate of probable effect of such
delay on progress of the work as part of the claim.
1.06 CONTRACTOR'S RESPONSIBILITY
A. Contractor shall provide sufficient skilled labor, materials, and equipment to properly
carry out the work in accordance with Construction Schedule.
1.07 SUSPENSION OF PAYMENTS
A. Initial Submittal: The Owner has the right to withhold progress payments until
Construction Schedule is approved.
B. Monthly Submittals: The Owner has the right to withhold progress payments if
Contractor fails to update and submit Construction Schedule and reports as
specified.
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1.08 RECORD COPY
A. At completion of work items, submit Construction Schedule reflecting actual project
critical paths.
PART 2 - PRODUCTS - NOT USED
PART 3 - EXECUTION - NOT USED
END OF SECTION
725 N Alameda Ave. 01 51 00
Azusa, CA 91702 CONST. FAC. & TEMP. CONTROLS
April 18, 2019
CONSTRUCTION FACILITIES AND TEMPORARY CONTROLS 015100 - [1]
SECTION 01 51 00
CONSTRUCTION FACILITIES AND TEMPORARY CONTROLS
PART 1 - GENERAL
1.01 SUMMARY
A. Provisions of the General and Supplementary Conditions and Division One apply to this
section.
B. Section Includes Description of temporary utilities and protection of construction facilities
that are to be provided and maintained by Contractor.
1.02 TEMPORARY UTILITIES
A. Electricity:
1. The Owner will furnish and pay for electrical power necessary for construction
purposes at site. Contractor shall provide necessary temporary wiring and
lighting and shall remove all temporary wiring and lighting at the completion of the
work. Temporary wiring and lighting shall comply with requirements of the Los
Angeles Electrical Code. Contractor shall be responsible for all damage caused
by overloading or other causes and the installation shall be satisfactory to the
Owner.
2. Furnish and install area distribution boxes, so located that individual trades may
use 100 feet maximum length extension cords to obtain adequate power and
artificial lighting, at points where required for work, for inspection and for safety.
3. Provide electricity needed for construction including connections for construction
equipment requiring power.
D. Heating and Ventilation:
1. Provide, maintain, and pay for heat needed for proper installation of work and to
protect materials and finishes from damage due to weather.
2. Provide ventilation of enclosed areas to cure materials, to disperse humidity, and
to prevent accumulation of dust, fumes, or gases.
C. Temporary Telephone: Contractor shall provide and pay all costs for one cellular
telephone or business telephone line at site for his use. Use of Owner telephones will not
be permitted.
D. Use means necessary to maintain temporary facilities and controls in proper and safe
condition throughout progress of work.
H. Make required connections to existing utility systems with minimum disruption to
services in existing utility systems. When disruption of existing s ervice is required,
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do not proceed without the Owner's approval and, when required, provide alternate
temporary service.
1.03 TEMPORARY HEATING AND COOLING
A. Equipment:
1. Contractor shall provide heating and/or cooling equipment as required to
provide heated and/or cooled conditioned air to occupied spaces for which
construction has temporarily disabled air conditioning equipment serving that
space. All equipment must be sized properly to meet cooling and/or heating
load requirements.
2. All temporary equipment must be secured with provisions stated in Section
1.04 of this specification.
3. Contractor shall be responsible for furnishing and installing all equipment
and/or items required to properly mount or secure temporary equipment.
4. Upon completion of this project, Contractor shall remove all temporary
equipment and appurtenances from the site. All areas and material finishes
must be restored to their original state.
1.04 CONTRACTOR'S FACILITIES
A. Storage Units:
1. Provide secure and waterproof storage units where required for the
temporary storage of furniture, equipment and other items. Storage unit
must be located within the confines of a safety barricade (see below) and
shall remain inaccessible to facility occupants.
2. Pay all delivery charges and set the storage unit where directed by the
Owner.
4. Remove storage unit from the site after removal of all the items that were
B. Contractor's Safety Barricade:
1. Contractor shall erect safety barricade as required by the Owner for the
protection and safety of staff and the public. New or pre-used material can
be utilized.
2. Unless otherwise indicated or specified, barricade shall be constructed of 8
feet high chain link fencing and shall be properly secured to the ground
and/or structure. Space posts not to exceed 10 feet on centers.
3. Chain link fencing shall be free from barbs, icicles or other projections resulting
from galvanizing process. Fence fabric having such defects will be rejected even
though it has been erected.
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4. Gates shall be fabricated of steel pipe with welded corners, and bracing as
required. Fabric to be attached to frame at 12 inch centers. Provide all gate
hardware of a strength and quality to perform satisfactorily until barricade is
removed upon completion of work.
5. At completion of work, remove barricade and concrete post footings from site;
backfill and compact fence footing holes. Existing surface paving that is cut into
or removed shall be patched and sealed to match surrounding areas.
6. The Inspector may allow the use of panelized chain link fence or properly
supported orange plastic fence.
C. Other Enclosures:
1. Provide lockable, temporary weather-tight enclosures at openings in exterior walls
to facilitate temporary cooling or heating and security.
2. Provide protective barriers around trees, plants and other improvements
designated to remain.
D. Storage Yards and Sheds:
1. Contractor shall fence and maintain storage yards in an orderly manner.
2. Storage for materials that cannot be stored outside may be stored within building.
3. Owner shall approve exact location, size and access of storage yards.
4. Remove storage yards and sheds as rapidly as progress of work will permit.
E. Contractor's Parking:
Location and number of spaces for Contractor's parking as directed by the
Owner, temporarily stored and when directed by the Owner.
1.05 GENERAL ITEMS
A. Staging areas for delivery of materials and equipment will be at locations designated by
the Owner.
B. Safety and Security Lighting: Provide 20-foot candles minimum inside building(s) and 5
foot candles outside.
C. Noise Control: Muffle all equipment. All noise levels shall comply with OSHA and
CAL/OSHA requirements. Excessive noise tasks such as coring etc. shall be performed
after hours or weekends.
D. Dust And Odor Control: Dust and odor barriers shall be in place dividing areas of work
and remainder of building to provide a safe and clean environment for building occupants.
Provide adequate ventilation if required. Comply with all OSHA and CAL/OSHA
requirements.
E. Where temporary noise/duct partitions are required, Contractor shall build a dividing
partition, which will extend from finished floor up tight to the underside of existing ceiling.
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(Upon removing partition, Contractor shall repair floor and/or ceiling as required to match
existing conditions.) Contractor shall construct partition in accordance with local building
codes. Under no circumstances shall temporary partition block any means of egress or
impede the regular flow of occupant traffic. Contractor shall provide Owner with a scaled
drawing indicating the exact location of the temporary partition relative to its’
surroundings. Contractor must have approval from Owner prior to the erection of such
partition.
PART 2 - PRODUCTS - NOT USED
PART 3 - EXECUTION - NOT USED
END OF SECTION
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Azusa, CA 91702 SHEETMETAL FLASHING AND TRIM
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SHEETMETAL FLASHING AND TRIM 076200 - [1]
SECTION 07 62 00
SHEET METAL FLASHING AND TRIM
PART 1 - GENERAL
1.01 SUMMARY
A. Provisions of Division 01 apply to this section.
B. Section Includes:
1. Sheet metal flashings in connection with roofing.
2. Reglet and counter flashing assemblies.
3. Miscellaneous metal flashing and counter flashing as required, except where
provided under Division 23 or Division 26.
4. Coping caps.
5. Gravel stops and metal edging.
6. Gutters and downspouts.
7. Splash pans where downspouts empty onto roofing.
8. Conductor heads.
9. Drip flashings.
10. Sheet metal covering at outside storage units.
11. Sheet metal wall coverings.
12. Roof pipe flashings.
13. Roof expansion joint covers.
14. Other sheet metal items, not necessarily specified herein or in other sections, but
required to prevent penetration of water into building.
C. Related Sections:
1. Division 23: Mechanical.
2. Division 26: Electrical.
1.02 SUBMITTALS
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A. Shop Drawings: Submit for fabricated sheet metal indicating shapes, details, methods of
joining, anchoring and fastening, thicknesses and gages of metals, concealed
reinforcement, expansion joint details, sections, and profiles.
B. Samples: Submit Samples for materials or assemblies as requested.
C. Product Data: Submit brochures of manufactured items.
1.03 QUALITY ASSURANCE
A. Drawings and requirements specified govern. Provide the Work of this section in
conformance with the Architectural Sheet Metal Manual published by SMACNA for
conditions not indicated or specified and for general fabrication of sheet metal items.
B. Materials shall conform to following standards:
1. ASTM A 167 - Stainless and Heat-Resisting Chromium-Nickel Steel Plate, Sheet
and Strip.
2. ASTM A 653 - Sheet Steel, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated
(Galvannealed) by the Hot-Dip Process.
3. ASTM B 370 - Copper Sheet and Strip for Building Construction.
4. ASTM B 749 - Lead and Lead Alloy Sheet, Strip and Plate Products.
C. Pre-installation Meetings: Refer to Division 7 roofing sections as appropriate. Attend the
pre-installation and inspection meetings for roofing Work.
1.04 DELIVERY, STORAGE AND HANDLING
A. Do not install bent and/or otherwise damaged materials.
PART 2 - PRODUCTS
2.01 MATERIALS
A. Galvanized Sheet Steel: ASTM A 653, coating designation G90, hot-dip galvanized.
B. Copper Plate, Sheet and Strip: ASTM B 370, cold-rolled, tempered. Copper sheet and
strip shall be cold-rolled-temper.
C. Sheet Lead: ASTM B 749, Type L50049 or L51121, weighing not less than 4 pounds per
square foot.
D. Stainless Steel: Plate, sheet and strip shall conform to ASTM A 167, Type 304 or Type
316, No. 4 finish on exposed surfaces and No. 2 finish on concealed surfaces unless
otherwise specified or indicated. Furnish Type 304 for general applications and Type 316
where exposed to acidic or alkaline conditions.
E. Fastenings:
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1. Galvanized Steel: Nails, rivets, and other fastenings furnished in connection with
galvanized sheet steel Work shall be sealed with rust resistive coating. Rivets
shall be tinned. Nails and other fastenings shall be zinc-coated.
2. Copper: Nails, rivets, and other fastenings furnished in connection with copper
sheet metal Work, shall be manufactured from hard-temper copper or hard brass.
3. Stainless Steel: Nails, rivets and other fastenings furnished in connection with
stainless steel Work, shall be 300 series alloy to match alloy of stainless steel
being fastened.
F. Soldering Flux: Raw muriatic acid for galvanized steel; rosin for tin, lead and tinned
copper; non-corrosive soldering salts for uncoated copper and acid-type flux formulated
for soldering stainless steel.
G. Solder: ASTM B 32, Grade 50A. Name of product manufacturer and grade designation
shall be stamped or cast onto each bar.
2.02 FABRICATION
A. General:
1. Accurately form sheet metal Work to dimensions and shapes indicated and
required. Cope finish molded and brake metal shapes with true, straight, sharp
lines and angles and, where intersecting each other, to a precise fit. Unless
otherwise specified, all galvanized sheet steel shall be 22 gage. Exposed edges
of sheet metal shall have a 1/2 inch minimum hemmed edge.
2. Soldering of sheet steel or copper shall be performed with well-heated copper
soldering iron or soldering torch, joints full flowing, neat and consistent.
Thoroughly clean materials at joints before soldering, and tin coppers before
soldering. Exposed soldering on finished surfaces shall be scraped smooth.
Lock seam Work shall be fabricated flat and true to line and soldered along its
entire length. Acid-fluxed Work shall be neutralized after fabrication.
3. Form and install sheet metal Work to provide proper allowances for expansion
and contraction, without causing undue stresses in any part of completed Work.
Installation shall be water and weathertight.
B. Gutters and Downspouts:
1. Gutters: Fabricate from 22 gage galvanized steel to match existing size and
design unless otherwise indicated. Drain gutter towards nearest downspout and
provide an expansion joint at mid-point between downspout outlets, but not to
exceed 50 feet on center. Gutters shall not pond water. Rivet joints and ends with
a minimum of 6 rivets per joint or maximum rivet spacing not to exceed 1 -1/2 inch
on center. Sweat solder from inside of gutter and in horizontal position where
possible. Neatly fit downspouts to gutter using a slip joint. Provide expansion
joints, consisting of 3 inch lap joints at not over 30 feet.
2. Form and install sheet metal Work to provide allowance for expansion and
contraction without causing undue stresses in the completed Work.
3. Downspouts: Fabricate downspouts from 3 inch round, or 3 inch by 4 inch
rectangular shapes, 16 gage steel tubing with butt joints and mitered elbows,
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sized as indicated. Downspouts exceeding 30 feet in length may be fabricated
with a slip joint or leader head. Downspout shall be fabricated with elbows at
bottom discharge or connected to drains as indicated. Joints, except expansion
joints shall be sealed with a continuous weld. Galvanize downspouts after
fabrication.
4. Outlets: Fabricate outlets of 22 gage galvanized sheet steel with a 1/4 inch rolled
flanged soldered continuously to gutter. Outside diameter shall be 1/8 inch less
than the diameter of the downspout and extend into downspout 3 inches. Install a
1/4 inch galvanized rod over center of outlet opening, lapping 1 inch over each
side of outlet and soldered in place. Galvanize rod after fabrication, before
installation.
C. Conductor Heads:
1. Fabricate conductor heads and outlets from 22 gage galvanized sheet steel.
Cover tops of the conductor heads with 22 gage galvanized 1/4 inch wire mesh
soldered securely to separately fabricated frame and mechanically fastened to
top conductor head with a minimum of 2 fasteners.
D. Gravel Stops: Provide 24 gage galvanized sheet steel gravel stops wherever roof area
drops to a lower level; at the eaves and rake of roof, where roof comes to an abrupt
edge, and where indicated. Stops shall be of height indicated and shall be fabricated
with 2 flanges. Horizontal flange shall be not less than 4 inches wide, and vertical flange
shall extend down over vertical surfaces of trim or gutter. Gravel stops shall lap 4 inches
at ends and corners, and shall be fabricated by notching and interlocking vertical face
flanges. Contact surfaces of lapped flanges, including raised areas, vertical face and
corners, shall be completely covered with flashing compound. Fabricate lap joints so that
they will be in the direction of water flow. Where flanges are over 5 inches wide, provide
20 gage continuous cleats fastened at 24 inches on center.
E. Overflow Outlets: Provide galvanized sheet steel overflow outlets at locations and of
sizes indicated. Outlets shall extend through full thicknes s of wall in one continuous
piece and completely line the opening. On outside face of wall, top and sides of outlet
shall finish 1/2 inch on surface of wall. Bottom of outlet shall project 1-1/2 inch beyond
face of wall, and shall be bent down slightly. Outlets shall be sealed on the surface of the
building. On inside face, side and bottom flanges shall extend not less than 8 inches
beyond edge of opening, and not less than 6 inches at top. Outlets shall be installed at
time roof is being installed.
F. Reglet Type Counterflashing: Where roof comes in contact with vertical surfaces,
provide counterflashing. Set top of counterflashing 8 inches above roof deck unless
otherwise indicated, and extend down at least 5 inches or to top of cant strip.
Counterflashing and reglet shall be 22 gage galvanized sheet steel. Lap counterflashing
and reglet 3 inches minimum at splices and miter at angles, or supply special metal
corner fittings. Reglet and method of securing flashing shall be so constructed that
flashing is firmly locked in place, but may be readily removed for replacement.
G. Splash Pans: Provide splash pans for all downspouts, which empty onto lower roofs.
Pans shall be galvanized sheet steel 12 inches by 18 inches, unless otherwise indicated,
and turned up 2 inches on at least 3 sides.
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H. Roof Expansion Joint Covers: Fabricate of 22 gage galvanized sheet steel, as detailed.
One side of joint shall be zee shaped, with 3 inch standing leg extended over the joint
and turned down. The other side shall be box shaped, fabricated to extend over the joint,
over the standing leg, and turn down to form a water barrier. Prefabricated bellows type
joint covers are not permitted.
I. Louvers, Fixed: For sizes 2’ x 3’ maximum (Provide heavier gages as required f or sizes
indicated on Drawings).
1. Gages: #22 gage for spans to 24”, #20 gage for spans to 36”.
2. Type: Similar to SMACNA Plates #102, #103A-2 frame, #103D-1 louvers, folded
U-frame Plate #108B
a. Insect Screen: 8 mesh with #27 gage galvanized wire
J. Miscellaneous Flashing: Unless otherwise indicated, miscellaneous flashing shall be
fabricated of galvanized steel. Exterior doors and windows, unless covered by
overhangs shall be provided with 22 gage galvanized steel drip flashing as detailed. At
wood construction, nail flashing to framing before paper backed lath is installed.
K. Sheet Metal Roofing at Outside Storage Units: Cover outside storage unit roof with #26
gage galvanized sheet steel as indicated. Turn metal under edge at top, hem 1/2 inch,
and secure with countersunk, flathead wood screws, spaced at 12 inches on centers.
L. Sheet Metal Wall Covering: Wall surfaces, where indicated, shall be covered with sheet
metal to height indicated. Metal covering shall be 24 gage galvanized sheet steel, with
joints between sheets occurring only over studs. Joints locked together and rolled flat.
Exposed edges of sheet metal shall be hemmed at least 1/2 inch. Nail sheets in field
along studding at 12 inches on center, and at top and bottom edges and seams at 4
inches on center, using 3d galvanized nails.
M. Roof Pipe Flashings: Provide welded seam 4 pound lead flashings. Field fabricated
flashings shall also be welded.
PART 3 - EXECUTION
3.01 PREPARATION
A. Concrete and masonry materials in contact with sheet metal shall be painted with alkali
resistant coating, such as heavy-bodied bituminous paint. Wood in contact with sheet
metal shall be painted with 2 coats of aluminum paint or one coat of heavy-bodied
bituminous paint.
3.02 INSTALLATION
A. General: Coordinate with installation of underlayment.
B. Gutters and Downspouts:
1. Anchor gutters to structure with 10 gage steel straps, galvanized after fabricating.
Secure straps with galvanized fasteners at 3 feet on center. Drill pilot holes and
use 12 x 2 inch pan head screws.
2. Install 1/4 inch galvanized wire mesh continuous cover on gutter where indicated.
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3. Secure downspouts to walls with 1/8 inch x 2 inch galvanized steel straps.
Straps shall be located at top, bottom, and at not over 10 feet on center. Block
downspouts out 1/2 inch from the finish wall surfaces. Secure straps to wall
framing with 1/4 inch by 2 inch long galvanized anchors. Expansion type anchors
shall be provided when anchoring to concrete and masonry. Provide toggle bolts
for attachment to masonry or plaster. At steel columns, provide fasteners as
indicated. Plastic anchors are not permitted.
4. Anchor conductor heads to walls with 1/4 inch x 2-1/2 inch galvanized lag screws
or 1/4 inch expansion type anchors.
C. Reglets: Install reglets at constant height above cant or as indicated. Provide minimum 3
inch lap at end splices of reglets. Caulk laps solidly.
D. Counterflashing:
1. Install at constant horizontal elevation across roof slope and slope at constan t
height above cant or as indicated.
2. Provide minimum 3 inch lap at all end splices of counterflashing.
E. Galvanized sheet steel parapet coping and flashing shall be continuous over top of
parapet to form a watertight cap, with waterproof seams at approximately 10 feet on
center, or as indicated. Anchor coping to outside of wall with a continuous cleat face
nailed at 24 inch centers. Coping shall be fastened on inside wall with hex head screws
and bonded sealing washers through oversized holes in the back of the coping. Corners
and angles shall be lapped and soldered; do not install joint sealant.
F. Prefabricated Louvers: Install plumb and level; securely anchor; seal watertight to
adjoining construction. Install screens, cranks, and blackout plates where required.
3.03 TESTING
A. Perform field water testing to demonstrate installation is watertight. Continue testing with
a continuous hose stream applied at base of installation for at least 30 minutes. If leaking
is observed, discontinue test and repair installation, then test until satisfactory results are
obtained.
3.04 PROTECTION
A. Protect the Work of this section until Substantial Completion.
3.05 CLEANING
A. Remove rubbish, debris, and waste materials and legally dispose of off the Project site.
END OF SECTION
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HVAC EQUIPMENT & DUCT CLEANING 233000 - [1]
SECTION 23 01 30.51
HVAC EQUIPMENT & DUCT CLEANING
PART 1 - GENERAL
1.01 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including General and Supplementary
Conditions and other Division 01 Specification Sections, apply to this Section.
1.02 SUMMARY
A. Section includes commissioning process requirements for HVAC&R systems, assemblies,
and equipment.
B. Related Sections:
1. Section 23 30 00 Heating, Ventilation and Air Conditioning
1.03 GENERAL CONDITIONS
A. General Conditions of the construction contract shall be a part of these specifications, and
shall govern the HVAC Systems Rehabilitation Contractor. All work shall be done in
accordance with requirements of the Owner and the construction contractor.
1. Contractor’s License: The Contractor shall be licensed in the State of California. This
License shall be a C-61 Specialty License in the D-64 Duct Cleaning Sub-Division.
2. “National Air Duct Cleaners Association (NADCA): The contractor shall be a Certified
Member in good standing with NADCA.
3. Contractor shall visit the site prior to bid and make himself thoroughly familiar with the
site and existing conditions. By submitting a bid for HVAC equipment and duct cleaning,
Contractor declares that he is familiar with existing conditions and is capable of
executing work detailed herein at no additional cost(s) to the Owner.
1.04 QUALITY ASSURANCE
A. Contractor shall have thorough knowledge and experience in the rehabilitation and cleaning of
projects of similar type, size, and degree of difficulty completed within the last two years.
Contractor agrees:
1. All work shall be supervised by a foreman having thorough knowledge and experience in
the cleaning of air conditioning systems. Experienced, qualified personnel shall perform
the work.
2. Contractor shall be fully covered by Workmen’s Compensation, Public Liability and
Property Damage Insurance, and certificates of these coverage’s and limits shall be
provided to the Owner upon request.
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3. Any mechanical problems discovered during the course of cleaning will be reported in
writing within 24 hours to the project coordinator
4. Contractor shall leave area of work in same condition as when work started (on a day-to-
day basis and from project start to finish).
5. Contractor shall keep work area free of all surplus material and debris. Upon completion
of each shift, all tools, equipment, debris, etc. shall be moved to a designated area
selected by the Owner.
6. Contractor shall take all necessary measures to minimize the migration of dust and other
air borne particles during the cleaning process. ALL outlets and inlets leading to (or
from) occupied spaces must be covered with a leak -proof catch basin. At no time shall
dust and/or other air borne particles be blown or dispersed into any space within the
building.
7. Contractor shall at all times be in compliance with Cal OSHA and EPA regulations.
8. Unless otherwise noted, Contractor shall be responsible for cleaning all existing supply,
return, exhaust, and outside air intake duct to remain as indicated on plans. Any
deviations from said section must be approved in writing by the Owner.
B. Photo Documentation: Documentation shall include the use of a digital camera and a
fiberoptic boroscope, where required. Contractor shall take photos of conditions before and
after cleaning for inclusion in a project report to be presented to the Owner at the conclusion
of the work.
1.05 LABOR AND MATERIALS
A. Contractor shall furnish all labor, materials, supplies, tools, equipment, supervision,
transportation and any other services or items necessary to accomplish the work.
B. Safety Procedures and Policy: Contractor shall provide adequate and necessary management
personnel to ensure that all safety policies and project requirements are met.
1. Maintain safe and healthy employee working conditions and establish safe operating
procedures at each job site.
2. Comply with the safety standards of all federal and state regulatory agencies as a
minimum requirement for safety performance at each job site.
3. Comply with all of the safety requirements of the job site and safety requirements
mandated by the Owner.
4. Contractor shall provide all necessary safety devices and personal protective equipment
for employee use, and shall require their use when needed.
5. The work in progress shall be subject to random unannounced inspections by a
representative of Owner.
6. Upon total completion of the project, representatives of Owner will do a quality control
inspection. Any area that does not meet the standards of this specification shall be
redone at no additional cost.
7. Electrical equipment, sensors and control devices shall be masked, or blocked off where
required for protection for water or chemicals.
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8. Disinfectant, when used, shall be applied in accordance with the manufacturer
instructions, and may be used prior to coating application. System shall be dried after
application of disinfectant.
9. HVAC coating shall be applied according to manufacturer instructions. Coating shall be
sprayed, brushed, or rolled directly into interior ductwork surface. A continuous film of
coating must be achieved. (Provide supplemental ventilation as required.)
10. All ducts too small to allow direct entrance shall have access openings installed
approximately every 10-15 feet as required, and at each elbow and vertical riser. Each
access opening shall be recovered with a panel made of the same gauge metal, and
installed in such a manner as to insure an airtight job. All sheet metal ductwork shall be
in accordance with SMACNA Standards, unless otherwise noted.
PART 2 - PRODUCTS
2.01 MATERIALS AND PRODUCTS
A. Material Safety Data sheets for all materials and products used by Contractor shall be
provided to Owner prior to start-up of cleaning operations.
B. Degreaser: Maintex 7-11 Armex Baking Soda Blasting Crystals or equal as approved by
Owner.
C. Sanitizer Oxine BBJ Microblocide or other EPA registered equal as approved by Owner.
D. Re-Surfacing Treatments: Schuller Superseal Edgecoat Fosters 40-20 Vac-Systems Tough
Coat Porta Sept by Porter Paints, containing EPA registered anti-microbial Swamp Cooler
Repair condensate drain pan sealant or other EPA registered equal as approved by Owner.
E. Paint: Styletone Series 8 19 Machinery Grey Zynolite Spray Paint.
F. Insulating Lining Material: To match existing or Certainteed Tough Gard Certainteed Ultra-Lite
Armaflex Astro-Foil or equal as approved by Owner.
G. Adhesives: Armstrong 520 DPIO/20 Super 77 Spray Adhesive or equal as approved by
Owner.
H. Duct Sealant: DP 10/10 Top 12000 Silicone Sealant or equal as approved by Owner
PART 3 – EXECUTION
3.01 METHODOLOGY
A. Cleaning of Ductwork
1. Clean only ductwork being used as part of ventilation system connecting to new supply
and relief fans (connecting to new fan coil units and extending to rooms with the VRF
systems).
2. All registers and diffusers shall be removed and cleaned with a mild detergent.
2. All ductwork (not accessible to personnel) shall be cleaned by compressed air, light
brush agitation, or vibration agitation, or a combination of any of the above. All duct to
be opened so the interior is as visible as possible.
3. Large ductwork shall be cleaned by manual brushing, or vibration agitation. All duct to
be opened so as to visually observe the cleaning process.
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4. All agitation of contaminants shall be accompanied by negative air pressure created by a
negative air machine using a HEPA filter.
5. Access needed for proper cleaning shall be cut into rigid metal ducts at elbows and
approximately every 15 feet. Holes shall be sized as appropriate to allow cleaning and
visual inspection inside duct.
6. All flexible ducts shall be disconnected at joints and registers for cleaning. Flexible duct
lengths of over 15 feet shall be cut at intervals not exceeding 15 feet.
7. Contractor shall provide access in existing ceilings and walls as required. Where
openings are made for cleaning purposes, Contractor shall repair such ceilings and walls
as required to give a uniform surface. Match existing materials, color and texture.
8. All interior dampers and turning vanes shall be cleaned with a stiff bristle brush and then
vacuumed.
9. The surface of all unreplaced liner shall be coated. Any small tears in fiberglass will be
repaired with lagging materials and then encapsulated.
10. All access holes made in ducts for cleaning purposes shall be sealed with galvanized
sheet panels of the same of heavier gauge metal as the duct. Panels shall be installed
with duct sealant and screwed into the duct at four-inch maximum on center, all around
as required to maintain an airtight seal. Proof will be required.
11. All flexible ducts disconnected for the purpose of cleaning shall be reattached in the
same manner as originally installed.
12. Clean all duct serving remodeled areas, including supply duct and transfer duct. Do not
clean main return ductwork at the central air conditioning unit.
B. Hazardous Materials
1. When asbestos or other hazardous materials are encountered, Contractor shall
document concern and forward to Owner forthwith.
2. Respiratory protection shall be OSAH/NIOSH approved with HEPA cartridges, or
cartridges designed for specific contaminants.
3. No material that is not approved by regulatory authorities shall be introduced to the
project as means for accomplishing work outlined herein.
END OF SECTION
725 N. Alameda Ave 23 05 29
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HANGARS AND SUPPORTS FOR HVAC PIPING AND EQUIPMENT 230529 - [1]
SECTION 23 05 29
HANGERS AND SUPPORTS FOR HVAC PIPING AND EQUIPMENT
PART 1 - GENERAL
1.1 DESCRIPTION
A. Pipe, duct, and equipment hangers, supports, and associated anchors.
B. Pipe and duct sleeves, seals and flashing.
C. Pipe shields and fire rated sleeves.
D. Related Work:
1. Section 23 07 13 – Mechanical Insulation
2. Section 23 31 00 – HVAC Duct and Casings
1.2 QUALITY ASSURANCE
A. Reference Standards:
1. ANSI/ASME B 31.1 – Power Piping
2. ANSI/ASME B31.9 – Building Services Piping
1.3 DESIGN RESPONSIBILITY
A. Design support and anchorage systems in accordance with procedures indicated herein and indicated
within the design documents.
B. Provide hot dipped galvanized support system for all external Mechanical services system support.
1.4 SUBMITTALS
A. Submit all insulated and non-insulated pipe, duct and equipment supports, framing, hangers, guides,
anchors and attachment methods.
B. Submit product data or provide calculations to demonstrate compliance with the requirements of regu-
latory agencies.
C. Note compliance with seismic regulations on submittals. Submit additional seismic calculations by Cal-
ifornia registered Structural Engineer as required by State, Federal or regulatory agencies.
D. Submit record drawings reflecting actual conditions.
725 N. Alameda Ave 23 05 29
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HANGARS AND SUPPORTS FOR HVAC PIPING AND EQUIPMENT 230529 - [2]
PART 2 - PRODUCTS
2.1 MATERIALS
(ALL materials exposed to external environment to be hot dipped galvanized.)
A. Hangers and Supports:
1. Superstrut (Thomas & Betts), except as otherwise noted, or Unistrut, Fee & Mason, B-Line. Super-
strut numbers are used.
2. Provide electro-chromate finish over galvanized or factory paint over galvanized. Superstrut “Gold-
Galv” or equivalent. No plain, “black” hangers allowed.
3. Other Individual Horizontal Piping: Series C-711 hangers 3 inches and smaller.
4. Other Individual Grouped Piping: Horizontal channel Superstrut A-1200 series with Series 702
straps.
5. Risers: Series C-720 at each floor.
6. Beam Clamps: No. U501, U520 symmetrical beam clamps.
7. Install pipe rollers for pipe subject to expansion and contraction.
a. No. C728 for trapeze supported pipe.
b. No. C729 for individually supported piping that is seismically braced.
8. Pipe Risers: Provide with bearing plates and two layers of 1/4- inch thick ribbed or waffled neoprene
pad loaded to not more than 50 psi. Separate isolation pads with 1/4-inch steel plate. Weld pipe
riser clamps at anchor points to the pipe and to pairs of vertical acoustical pipe anchor mountings
that, in turn, rigidly fasten to steel framing.
9. Dielectric Isolators: All uninsulated copper tubing systems. Use Superstrut isolators, Cush-A-Strip
or Cush-A-Clamp on all pipe clamps. For individual hangers, use felt lined hangers.
10. Miscellaneous Steel: Provide miscellaneous steel members, beams, brackets, etc., for support of
Work of this Division unless specifically included i n other Divisions.
11. Vibration Isolation elements of supports for piping, equipment and seismic bracing:
12. Safety Hanger Wires:
a. Furnish and install safety hanger wires for air diffusers and other mechanical units weighing
less than 56 pounds per unit.
1) As part of Work under this Division 23 – Heating, Ventilating, and Air-Conditioning
(HVAC), connect safety wires to mechanical diffusers and equipment.
2) Where units are mounted on suspended-grid ceiling systems, connect under Division 09.
b. Provide approved hangers as required by 2016 CBC.
c. In advance of ceiling hanger-wire work, provide to jobsite layouts or instructions necessary for
proper installation of safety wires.
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B. Insulated Pipe Supporters:
1. Insulation Shields: 360-degree insert of high density, 100 psi, waterproofed calcium silicate, asbes-
tos-free, K=0.38, encased in a 360-degree galvanized sheet metal shield, ASTM A-527.
a. Pipe supported on rod hangers: Use Models A1000, A2000, A3000, A4000, and A9000.
b. Pipe supported on flat surfaces: Use Models A1000, A2000, A5000, A6000, and A7000.
c. Pipe supported on pipe rolls: Use Models A3000, A4000, A5000, A6000, and A8000.
d. Model designations are by Pipe Shields, In. or equal.
2. Insulation Saddles: 20-gauge galvanized sheet metal. Superstrut 180 degrees C -790. Saddle
length not less than three times the insulation outside diameter; 12 -inch minimum length at each
hanger.
C. Escutcheons, Flashings and Sleeves:
1. Escutcheons:
a. One-piece Grinnell, or Beaton-Corbin; Fig. 2 for copper tubing; Fig. 13 for steel pipe, polished
chrome plated brass plates with round head set screws. Spring clips not acceptable. Provide
at all exposed piping penetrations of walls, floors, and ceilings. “Exposed” means all finished
rooms, including storage, janitor and mechanical rooms. Where piping is insulated provide
escutcheons to fit insulation outside diameter. Where piping requires special escutcheon
sizes, manufacture from stainless steel.
b. Escutcheons shall be of sufficient outside diameter to cover sleeve opening and fit snugly
around pipe. Provide special deep escutcheons where necessary to cover beads of fittings or
sleeves extending through floors.
2. Flashings: Flash and counterflash watertight all pipe and duct penetrations of roofs and exterior
walls. Pipes through roofs with M.D. Products No. 65; No. 67 with vandal caps for vents; provide
counterflashing sleeves. Other flashings shall be 24 gauge galvanized s heet metal. In accordance
with Division 07.
3. Make penetrations through any dampproofed/waterproofed surfaces dampproof/ waterproof by ap-
propriate means to maintain integrity of system penetrated. Includes penetrations caused by hang-
ers suspended off such surfaces.
4. Sleeves:
a. Through Interior Concrete Walls and Floors: “Adjust -to-Crete,” or A.M.I., telescopic, sub-
merged adjustable sleeves. Pack annular space between pipe and sleeve tight with fiberglass.
Seal both sides with mastic for floor sleeves.
b. Through fire walls or floors, or lightproof or soundproof walls, floors and partitions: Pack space
between sleeve and pipe or insulation with non-shrink grout, ceramic fiber, neoprene coated
rope or other approved sealant materials. Install rigid calcium silicate insert on insulated pipe.
Approved prefabricated assemblies, Pipe Shields or equal.
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c. Provide pipes passing through floors, walls, partitions, roofs or concrete beams with sleeves
having internal diameter 1 inch larger than outside diameter of pipe, or of insu lation on covered
lines, except for sleeves connecting buildings which shall be 1 -1/2 inch larger.
d. Sleeves through outside walls or through slab-on-grade, except soil pipe through slab: Sched-
ule 40 galvanized steel pipe with anchor and waterstop plate and 150 pound galvanized steel
slip on welding flange welded at center of sleeve painted with one coat of bitumastic paint
inside and outside. Provide a watertight penetration using prefabricated seals, Thunderline
Link-Seal or equal. This paragraph does not apply for sleeves connecting buildings.
e. Terminate sleeves flush with walls and ceilings. Where vertical pipes are exposed, extend
sleeves 1 inch above finished floor except where escutcheons are required.
f. Sleeves passing through roof construction: Extend m inimum 8 inches above roof, flash and
sealed watertight with safe support of conduit and equipment furnished under each division.
g. Sleeves through interior walls other than masonry or concrete: 12 gauge galvanized sheet
steel, set flush with finished surfaces of partitions.
h. Sprinklered Areas: Provide water-tight joint between floor and pipe or conduit passing through
it by using pipesleeve projecting 3 inches to 6 inches above the floor in accordance with NFPA
13, 2002 edition, caulked at the top of the sleeves with oakum.
i. Sleeves passing through membrane waterproofing or lead safe: Provide 16 ounce soft sheet
copper or four pound lead flashing extending 12-inches beyond sleeves in all directions; se-
cure to waterproofing or lead safe, turn down flashing into space between pipe and sleeve;
insert oakum gasket, pour lead, caulk water-tight.
j. Un-insulated copper pipe through ferrous sleeves or in contact with cement or concrete: Wrap
pipe with two layers of heavy plastic protective tape. Finish wrapping flush with sleeve ends.
k. Insulated piping or ductwork through sleeves shall have uninterrupted insulation inside sleeves
or openings. For underground penetrations, stop insulation at seal.
l. Separate piping through walls, other than concrete walls, from contact with wa ll construction
materials with nonhardening caulking and non-shrinking acoustical caulking.
5. Floor penetrations and fire and smoke rated wall penetrations:
a. Acceptable manufacturers: Pipe Shields, Inc., ProSet “Firestop Penetrators”, PHD or equal.
b. UL or State Fire Marshal (SFM) listed. Furnish listing number and demonstrate SFM approval.
c. Manufactured, pre-engineered, fire-rated pipe sleeve kits shall be provided for all firewall and
deck penetrations.
d. Sleeve and packing shall have the same fire rating as the partition construction in which they
are installed.
e. Bare pipe:
1) All steel pipe or copper tubing penetrating firewalls or decks shall be encircled by sheet
metal sleeves, minimum 24 gauge, sized for maximum one inch annular spacing between
pipe and sleeve. Pack spacing on each end with UL rated ceramic fiber strip insulation.
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HANGARS AND SUPPORTS FOR HVAC PIPING AND EQUIPMENT 230529 - [5]
2) Pipe Shields, Inc. Models F3000, F3200, F3400, F3600, F6000, F6200, F9000, and
F9200, or equal.
f. Insulated pipe:
1) Same as for bare pipe, but with the addition of a 360-degree cylinder of waterproofed
calcium silicate insulation encasing the pipe and covered with a galvanized sheet metal
shielding, all sized to extend to a minimum of one inch beyond wall or deck.
2) All insulated fire-rated wall penetrations shall have the insulation shield grooved if pipe is
heat-traced and the groove reinforced as necessary for seismic loading.
3) Pipe Shields, Inc. Models F1000 through F1600, F2000 through F2600, F4000 through
F5200, and F7000 through F8200, or equal.
4) Pipe Shields, Inc. Models F1800 and F2800, or equal.
PART 3 - EXECUTION
3.1 INSTALLATION
A. General: Properly support all material, equipment, and apparatus. Minimum safety factor of 5, based on
ultimate tensile or compressive strength, as applica ble, or material used. Turnbuckles and rod couplings
capacity not less than attached rod. Calculate with equipment and piping full of refrigerant.
B. Use properly manufactured supports throughout. Do not use makeshift materials such as wire, tape,
wood blocks, etc.
C. Comply with applicable requirements of ASME B31.1 and B31.9 for piping.
D. Trapeze hangers may be used for parallel lines if pipes pitch same direction. Size trapeze channel
assembly in accordance with manufacturer’s published load ratings. Deflec tions shall not exceed 1/360
of a span (refer to Superstrut load tables).
E. Do not cut or weld to any structural steel without permission of County’s Representative.
F. If not specified to be isolated by other means, isolate pipe supported by clamps or hooks fr om supports
and building construction with felt.
G. Clamps shall not anchor piping unless specifically used as part of an anchoring system.
H. Supports from wall shall be steel brackets, hooks, or clamps attached to wall structure with anchor bolts.
I. Install riser clamps at each floor and other locations as required by Code.
J. Resiliently isolate any bare copper piping with pipe insulators to prevent steel to copper contact.
K. Pipe Hanger Spacing:
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1. Support vertical risers at their bases and at each floor minimum. Copper piping less than 1-1/2 inch
diameter and steel piping less than 3/4-inch diameter shall have one intermediate support between
floors.
2. Support every pipe branch over three feet long.
3. Support horizontal as follows:
Pipe
Size
(Inches)
Clamp
(Super-
strut)
Rod
Size
(Inches)
Center
to SCH
40 Steel
Stain-
less
Copper Cast
Iron
(Feet)
PVC
SCH
40
PVC
SCH
80
1/2-1 C-711 3/8 8 6 - 4 4
1 1/4 -
1 1/2
C-711 3/8 8 8 10 4 6
2 C-711 3/8 10 8 10 4 6
3 - 4 C-711 1/2 12 12 10 4 6
5 C-710 5/8 14 12 10 4 8
6 C-710 3/4 14 12 10 4 8
4. Install hanger within 12 inches of each change of direction and for each branch 5 feet and longer.
5. Support refrigerant piping within 6 feet of equipment and within two feet of each bend or angle.
L. Adjust each hanger to carry its proper share of load.
M. Support piping below any ductwork from wall or trapeze with hanger rods outside of ductwork.
N. Contractor shall be responsible for proper alignment of piping at equipment in all conditions (maximum
hot to minimum cold); install anchors, guides, bracing, and spring supports as required. Flexible con-
nections, expansion joints' deflections shall be always within allowable limits. Do not install p iping at
equipment until inspected for alignment at extreme temperature conditions.
END OF SECTION
725 N. Alameda Ave. 23 05 53
Azusa, CA 91702 Mechanical Identification
March 28, 2019
MECHANICAL IDENTIFICATION 230553 - [1]
SECTION 23 05 53
MECHANICAL IDENTIFICATION
PART 1 - GENERAL
1.01 SUMMARY
A. Section Includes: Provide marking and identification required on all mechanical piping
systems, ducts, controls, valves, apparatus, etc., as specified in this Section or any
related Sections.
1.02 SUBMITTALS
A. Submit in accordance with Section 01 33 00.
B. Submit samples of materials.
1.03 QUALITY ASSURANCE
A. Comply with provisions of Section 23 30 00.
PART 2 - PRODUCTS
2.01 MATERIALS
A. General: All piping systems, controls, valves, apparatus, etc., except those that are
installed in inaccessible locations in partitions, walls, and floors, and those buried
underground, shall be permanently identified.
2.02 VALVES
A. Use existing chart or diagram for each piping system, indicating thereon by identifying
letter or number each valve in the system, its location, and function.
B. Existing color chart is located at the basement level in existing mechanical room.
C. Bind copies of each chart in Operating Instructions Manual.
D. Provide each valve with brass, aluminum or plastic disc, not less than 1-1/4" diameter
bearing engraved numbers corresponding to those indicated on chart. Fasten discs to
valve with No. 14 brass wire.
E. Provide an additional tag for all safety valves and other valves that could be hazardous
to safety and health of occupants. Distinguish these tags from regular valve tags by
color (such as yellow with black letters, and marked "Danger") submit sample tag to the
District Inspector.
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Azusa, CA 91702 Mechanical Identification
March 28, 2019
MECHANICAL IDENTIFICATION 230553 - [2]
2.03 INSTRUMENTS AND CONTROLS
A. Identify all panel-mounted instruments and controls with engraved bakelite nameplates
permanently affixed to Panel boards.
B. Identify all alarm indicating devices and alarm reset devices by nameplates.
C. Identify all damper motors and automatic valves, flow switches, pressure switches, etc.,
with embossed aluminum or plastic tape affixed to controller, indicating service and
setting.
2.04 EQUIPMENT
A. Identify each major piece of equipment with stenciled designation corresponding to its
designation on the Contract Drawings.
2.05 PIPELINES IDENTIFICATION
A. Identify all pipes by means of colored labels with directional arrows as indicated in
schedule. (Contractor shall use District colors to distinguish equipment and/or piping
use.)
B. Materials: Waterproof plastic cloth, all-temperature, self-adhering, or markers similar to
Western "Tel-A-Pipe", Type I, or equal by W.H. Bradley Co.
C. Size: For pipes up to 3" diameter, 2-1/4" x 9" minimum, with 1/2" letters; for pipes over
3" diameter, 2-1/4" x 9" minimum, with 1-1/2" letters.
D. Colors:
1. Backgrounds: As indicated in schedule.
2. Letters: White on red background; black on all other backgrounds.
E. Locations:
1. On all accessible piping, whether insulated or not (including mechanical rooms,
attic and ceiling spaces); except that labels shall be omitted from piping where
use is obvious due to its connection to fixtures (such as faucets, water closets,
etc.).
2. Near each valve and branch connection in such accessible piping.
3. At each pipe passage through wall or floor.
4. At not more than 40'-0" spacing on straight pipe run between bands required in 2
and 3 above.
5. At each change in direction.
F. Application: Apply on clean surfaces free of dust, grease, oil or any material that will
prevent proper adhesion. Replace all non-adhering or curling labels with new labels, as
approved by the District Inspector.
1. Use spray adhesive on insulated pipes in addition to adhesive on marker.
2. Finish all exposed markers with one coat of lacquer.
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MECHANICAL IDENTIFICATION 230553 - [3]
G. Schedule:
Content of Pipe Legend Color Note
Refrigerant HPG G *
High Pressure Gas Refrigerant
Refrigerant LPG G *
Low Pressure Gas Refrigerant
Refrigerant HPL Y *
High Pressure Liquid Refrigerant
Condensate CD *
**Contractor shall verify all colors and verbiage with District prior to labeling.
H. Notes on Schedule:
1. Symbol * indicates flow arrow required.
2. Symbol (1) indicates 2-1/4" x 1" yellow label with 1/2" letters reading UNSAFE WATER at
one end of primary label.
3. Hyphen between words indicates 2 separate stock labels are required, although a
single special label with all lettering is equally acceptable.
4. Background colors: Symbol Y indicates yellow background color. Symbol G indicates green
background color. Symbol R indicates red background color.
2.06 IDENTIFICATION OF AIR CONDITIONING EQUIPMENT
Identify location of air conditioning equipment above Tee Bar Ceilings. Install 3/4” to 1” diameter colored
self adhesive dots to Tee Bar Ceiling grid showing access. Please note that the following identification
shall be included on as built control drawings.
A Fire Damper Red
B Manual Volume Dampers Blue
1. Supply Air Full Dot
2. Return Air Half Dot.
C Fan coil unit Green
D Filter Location if separate from fan coil Yellow
725 N. Alameda Ave. 23 05 53
Azusa, CA 91702 Mechanical Identification
March 28, 2019
MECHANICAL IDENTIFICATION 230553 - [4]
PART 3 - EXECUTION
3.01 INSTALLATION
A. Report any conditions detrimental to proper and timely completion of work. Apply markers
and identification tags as specified using approved materials and installation procedures
recommended by manufacturer.
END OF SECTION 23 05 53
725 N. Alameda Ave. 23 05 93
Azusa, CA 91702 TESTING, ADJUSTING, AND BALANCING FOR HVAC
March 28, 2019
TESTING, ADJUSTING, AND BALANCING 230593 - [1]
SECTION 230593
TESTING, ADJUSTING, AND BALANCING FOR HVAC
PART 1 - GENERAL
1.01 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including General and Supplementary
Conditions and Division 01 Specification Sections, apply to this Section.
2.01 SUMMARY
A. Section Includes:
1. Balancing Air Systems:
a. Constant-volume air systems.
2. Duct leakage tests.
3.01 DEFINITIONS
A. AABC: Associated Air Balance Council.
B. BAS: Building automation systems.
C. NEBB: National Environmental Balancing Bureau.
D. TAB: Testing, adjusting, and balancing.
E. TABB: Testing, Adjusting, and Balancing Bureau.
F. TAB Specialist: An independent entity meeting qualifications to perform TAB work.
G. TDH: Total dynamic head.
4.01 PRE-INSTALLATION MEETINGS
A. TAB Conference: If requested by the Owner, conduct a TAB conference at Project site. Insert
after approval of the TAB strategies and procedures plan to develop a mutual understanding of
the details. Provide a minimum of 14 days' advance notice of scheduled meeting time and
location.
1. Minimum Agenda Items:
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TESTING, ADJUSTING, AND BALANCING 230593 - [2]
a. The Contract Documents examination report.
b. The TAB plan.
c. Needs for coordination and cooperation of trades and subcontractors.
d. Proposed procedures for documentation and communication flow.
5.01 INFORMATIONAL SUBMITTALS
A. Qualification Data: Within 30 days of Contractor's Notice to Proceed, submit documentation that
the TAB specialist and this Project's TAB team members meet the qualifications specified in
"Quality Assurance" Article.
B. Contract Documents Examination Report: Within 30 days of Contractor's Notice to Proceed,
submit the Contract Docum ents review report as specified in Part 3.
C. Strategies and Procedures Plan: Within 30 days of Contractor's Notice to Proceed, submit TAB
strategies and step-by-step procedures as specified in "Preparation" Article.
D. System Readiness Checklists: Within 30 days of Contractor's Notice to Proceed, submit system
readiness checklists as specified in "Preparation" Article.
E. Examination Report: Submit a summary report of the examination review required in
"Examination" Article.
F. Certified TAB reports.
G. Sample report forms.
H. Instrument calibration reports, to include the following:
1. Instrument type and make.
2. Serial number.
3. Application.
4. Dates of use.
5. Dates of calibration.
6.01 QUALITY ASSURANCE
A. TAB Specialists Qualifications: Certified by AABC.
1. TAB Field Supervisor: Employee of the TAB specialist and certified by AABC.
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TESTING, ADJUSTING, AND BALANCING 230593 - [3]
2. TAB Technician: Employee of the T AB specialist and certified by AABC as a TAB
technician.
B. Instrumentation Type, Quantity, Accuracy, and Calibration: Comply with requirements in
ASHRAE 111, Section 4, "Instrumentation."
C. ASHRAE Compliance: Applicable requirements in ASHRAE 62.1, Section 7.2.2 - "Air
Balancing."
D. ASHRAE/IESNA Compliance: Applicable requirements in ASHRAE/IESNA 90.1, Section 6.7.2.3
- "System Balancing."
7.01 FIELD CONDITIONS
A. Full Owner Occupancy: Owner will occupy the site and existing building during entire TAB
period. Cooperate with Owner during TAB operations to minimize conflicts with Owner's
operations.
B. Partial Owner Occupancy: Owner may occupy completed areas of building before Substantial
Completion. Cooperate with Owner during TAB operations to minimize conflicts with Owne r's
operations.
PART 2 - PRODUCTS (Not Applicable)
PART 3 - EXECUTION
1.01 EXAMINATION
A. Examine the Contract Documents to become familiar with Project requirements and to discover
conditions in systems designs that may preclude proper TAB of systems and equipment.
B. Examine installed systems for balancing devices, such as test ports, gage cocks, thermometer
wells, flow-control devices, balancing valves and fittings, and manual volume dampers. Verify
that locations of these balancing devices are applicable for intended purpose and are
accessible.
C. Examine the approved submittals for HVAC systems and equipment.
D. Examine design data including HVAC system descriptions, statements of design assumptions
for environmental conditions and systems output, and statements of philosophies and
assumptions about HVAC system and equipment controls.
E. Examine ceiling plenums and underfloor air pl enums used for supply, return, or relief air to
verify that they are properly separated from adjacent areas. Verify that penetrations in plenum
walls are sealed and fire-stopped if required.
F. Examine equipment performance data including fan and pump curves.
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TESTING, ADJUSTING, AND BALANCING 230593 - [4]
1. Relate performance data to Project conditions and requirements, including system effects
that can create undesired or unpredicted conditions that cause reduced capacities in all
or part of a system.
2. Calculate system-effect factors to reduce performance ratings of HVAC equipment when
installed under conditions different from the conditions used to rate equipment
performance. To calculate system effects for air systems, use tables and charts found in
AMCA 201, "Fans and Systems," or in SMACNA's "HVAC Systems - Duct Design."
Compare results with the design data and installed conditions.
G. Examine system and equipment installations and verify that field quality-control testing,
cleaning, and adjusting specified in individual Sections have been performed.
H. Examine test reports specified in individual system and equipment Sections.
I. Examine HVAC equipment and verify that bearings are greased, belts are aligned and tight,
filters are clean, and equipment with functioning controls is ready for operation.
J. Examine terminal units, such as fan coil units, and verify that they are accessible and their
controls are connected and functioning.
K. Examine heat-transfer coils for correct piping connections and for clean and straight fins.
L. Examine operating safety interlocks and controls on HVAC equipment.
M. Report deficiencies discovered before and during performance of TAB procedures. Observe
and record system reactions to changes in conditions. Record default set points if different from
indicated values.
2.01 PREPARATION
A. Prepare a TAB plan that includes the following:
1. Equipment and systems to be tested.
2. Strategies and step-by-step procedures for balancing the systems.
3. Instrumentation to be used.
4. Sample forms with specific identification for all equipment.
B. Perform system-readiness checks of HVAC systems and equipment to verify system readiness
for TAB work. Include, at a minimum, the following:
1. Airside:
a. Verify that leakage and pressure tests on air distribution systems have been
satisfactorily completed.
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TESTING, ADJUSTING, AND BALANCING 230593 - [5]
b. Duct systems are complete with terminals installed.
c. Clean filters are installed.
d. Fans are operating, free of vibration, and rotating in correct direction.
e. Variable-frequency controllers' startup is complete and safeties are verified.
f. Automatic temperature-control systems are operational.
g. Ceilings are installed.
h. Suitable access to balancing devices and equipment is provided.
3.01 GENERAL PROCEDURES FOR TESTING AND BALANCING
A. Perform testing and balancing procedures on each system according to the procedures
contained in AABC's "National Standards for Total System Balance" and in this Section.
B. Cut insulation, ducts, pipes, and equipment cabinets for installation of test probes to the
minimum extent necessary for TAB procedures.
1. After testing and balancing, patch probe holes in ducts with same material and thickness
as used to construct ducts.
2. After testing and balancing, install test ports and duct access doors that comply with
requirements in Section 233300 "Air Duct Accessories."
3. Install and join new insulation that matches removed materials. Restore insulation,
coverings, vapor barrier, and finish according to Section 230713 "Duct Insulation".
C. Mark equipment and balancing devices, including damper -control positions, valve position
indicators, fan-speed-control levers, and similar controls and devices, with paint or other
suitable, permanent identification material to show final settings.
D. Take and report testing and balancing measurements in inch-pound (IP) units.
E. For VRF Systems in addition to requirements listed below perform all TAB requirements per
VRF installation guidelines and assist in VRF system manuf acturer’s commissioning
requirements.
4.01 GENERAL PROCEDURES FOR BALANCING AIR SYSTEMS
A. Prepare test reports for both fans and outlets. Obtain manufacturer's outlet factors and
recommended testing procedures. Cross-check the summation of required outlet volumes with
required fan volumes.
B. Prepare schematic diagrams of systems' "as-built" duct layouts.
C. Determine the best locations in main and branch ducts for accurate duct-airflow measurements.
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D. Check airflow patterns from the outdoor-air louvers and dampers and the return- and exhaust-
air dampers through the supply-fan discharge and mixing dampers.
E. Locate start-stop and disconnect switches, electrical interlocks, and motor starters.
F. Verify that motor starters are equipped with properly sized thermal protection.
G. Check dampers for proper position to achieve desired airflow path.
H. Check for airflow blockages.
I. Check condensate drains for proper connections and functioning.
J. Check for proper sealing of air-handling-unit components.
K. Verify that air duct system is sealed as specified in Section 233113 "Metal Ducts."
5.01 PROCEDURES FOR CONSTANT-VOLUME AIR SYSTEMS
A. Adjust fans to deliver total indicated airflows within the maximum allowable fan speed listed by
fan manufacturer.
1. Measure total airflow.
a. Set outside-air, return-air, and relief-air dampers for proper position that simulates
minimum outdoor-air conditions.
b. Where duct conditions allow, measure airflow by Pitot -tube traverse. If necessary,
perform multiple Pitot-tube traverses to obtain total airflow.
c. Where duct conditions are not suitable for Pitot-tube traverse measurements, a coil
traverse may be acceptable.
d. If a reliable Pitot-tube traverse or coil traverse is not possible, measure airflow at
terminals and calculate the total airflow.
2. Measure fan static pressures as follows:
a. Measure static pressure directly at the fan outlet or through the flexible connection.
b. Measure static pressure directly at the fan inlet or through the flexible connection.
c. Measure static pressure across each component that makes up the air -handling
system.
d. Report artificial loading of filters at the time static pressures are measured.
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3. Review Record Documents to determine variations in design static pressures versus
actual static pressures. Calculate actual system -effect factors. Recommend adjustments
to accommodate actual conditions.
4. Obtain approval from Engineer of Record for adjustment of fan speed higher or lower
than indicated speed. Comply with requirements in HVAC Sections for air -handling units
for adjustment of fans, belts, and pulley sizes to achieve indicated air -handling-unit
performance.
5. Do not make fan-speed adjustments that result in motor overload. Consult equipment
manufacturers about fan-speed safety factors. Modulate dampers and measure fan-
motor amperage to ensure that no overload occurs. Measure amperage in full-cooling,
full-heating, economizer, and any other operating mode to determine the maximum
required brake horsepower.
B. Adjust volume dampers for main duct, submain ducts, and major branch ducts to indicated
airflows.
1. Measure airflow of submain and branch ducts.
2. Adjust submain and branch duct volume dampers for specified airflow.
3. Re-measure each submain and branch duct after all have been adjusted.
C. Adjust air inlets and outlets for each space to indicated airflows.
1. Set airflow patterns of adjustable outlets for proper distribution without drafts.
2. Measure inlets and outlets airflow.
3. Adjust each inlet and outlet for specified airflow.
4. Re-measure each inlet and outlet after they have been adjusted.
D. Verify final system conditions.
1. Re-measure and confirm that minimum outdoor, return, and relief airflows are within
design. Readjust to design if necessary.
2. Re-measure and confirm that total airflow is within design.
3. Re-measure all final fan operating data, rpms, volts, amps, and static profile.
4. Mark all final settings.
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5. Test system in economizer mode. Verify proper operation and adjust if necessary.
6. Measure and record all operating data.
7. Record final fan-performance data.
6.01 PROCEDURES FOR MOTORS
A. Motors 1/2 HP and Larger: Test at final balanced conditions and record the following data:
1. Manufacturer's name, model number, and serial number.
2. Motor horsepower rating.
3. Motor rpm.
4. Phase and hertz.
5. Nameplate and measured voltage, each phase.
6. Nameplate and measured amperage, each phase.
7. Starter size and thermal-protection-element rating.
8. Service factor and frame size.
B. Motors Driven by Variable-Frequency Controllers: Test manual bypass of controller to prove
proper operation.
7.01 PROCEDURES FOR CONDENSING UNITS
A. Verify proper rotation of fans.
B. Measure entering- and leaving-air temperatures.
C. Record fan and motor operating data.
D. Follow equipment manufacturer guidelines.
8.01 PROCEDURES FOR HEAT-TRANSFER COILS
A. Measure, adjust, and record the following data for each refrigerant coil:
1. Dry-bulb temperature of entering and leaving air.
2. Wet-bulb temperature of entering and leaving air.
3. Airflow.
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9.01 DUCT LEAKAGE TESTS
A. Witness the duct pressure testing performed by Installer.
B. Verify that proper test methods are used and that leakage rates are within specified tolerances.
C. Report deficiencies observed.
10.01 CONTROLS VERIFICATION
A. In conjunction with system balancing, perform the following:
1. Verify temperature control system is operating within the design limitations.
2. Confirm that the sequences of operation are in compliance with Contract Documents.
3. Verify that controllers are calibrated and function as intended.
4. Verify that controller set points are as indicated.
5. Verify the operation of lockout or interlock systems.
6. Verify the operation of valve and damper actuators.
7. Verify that controlled devices are properly installed and connected to correct controller.
8. Verify that controlled devices travel freely and are in position indicated by controller:
open, closed, or modulating.
9. Verify location and installation of sensors to ensure that they sense only intended
temperature, humidity, or pressure.
10. Follow all equipment manufacturer guidelines.
B. Reporting: Include a summary of verifications performed, remaining deficiencies, and variations
from indicated conditions.
11.01 TOLERANCES
A. Set HVAC system's airflow rates and water flow rates within the following tolerances:
1. Supply, Return, and Exhaust Fans and Equipment with Fans: Plus or minus 10.
2. Air Outlets and Inlets: Plus or minus 10 percent.
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3. Contractor to provide the necessary sheaves, pulleys and other accessories needed to
meet the tolerance requirements.
B. Maintaining pressure relationships as designed shall have priority over the tolerances specified
above.
12.01 PROGRESS REPORTING
A. Initial Construction-Phase Report: Based on examination of the Contract Documents as
specified in "Examination" Article, prepare a report on the adequacy of design for systems
balancing devices. Recommend changes and additions to systems balancing devices to
facilitate proper performance measuring and balancing. Recommend changes and additions to
HVAC systems and general construction to allow access for performance measuring and
balancing devices.
B. Status Reports: Prepare monthly progress reports to describe completed procedures,
procedures in progress, and scheduled procedures. Include a list of deficiencies an d problems
found in systems being tested and balanced. Prepare a separate report for each system and
each building floor for systems serving multiple floors.
13.01 FINAL REPORT
A. General: Prepare a certified written report; tabulate and divide the report into separate sections
for tested systems and balanced systems.
1. Include a certification sheet at the front of the report's binder, signed and sealed by the
certified testing and balancing engineer.
2. Include a list of instruments used for procedures, along with proof of calibration .
3. Certify validity and accuracy of field data.
B. Final Report Contents: In addition to certified field-report data, include the following:
1. Fan curves.
2. Manufacturers' test data.
3. Field test reports prepared by system and equipment installers.
4. Other information relative to equipment performance; do not include Shop Drawings and
Product Data.
C. General Report Data: In addition to form titles and entries, include the follo wing data:
1. Title page.
2. Name and address of the TAB specialist.
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3. Project name.
4. Project location.
5. Engineer's name and address.
6. Contractor's name and address.
7. Report date.
8. Signature of TAB supervisor who certifies the report.
9. Table of Contents with the total number of pages defined for each section of the report.
Number each page in the report.
10. Summary of contents including the following:
a. Indicated versus final performance.
b. Notable characteristics of systems.
c. Description of system operation sequence if it varies from the Contract
Documents.
11. Nomenclature sheets for each item of equipment.
12. Data for terminal units, including manufacturer's name, type, size, and fittings.
13. Notes to explain why certain final data in the body of reports vary from indicated values.
14. Test conditions for fans performance forms including the following:
a. Settings for outdoor-, return-, and exhaust-air dampers.
b. Conditions of filters.
c. Cooling coil, wet- and dry-bulb conditions.
d. Face and bypass damper settings at coils.
e. Fan drive settings including settings and percentage of maximum pitch diameter.
f. Inlet vane settings for variable-air-volume systems.
g. Settings for supply-air, static-pressure controller.
h. Other system operating conditions that affect performance.
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D. System Diagrams: Include schematic layouts of air distribution systems. Present each system
with single-line diagram and include the following:
1. Quantities of outdoor, supply, return, and exhaust airflows.
2. Duct, outlet, and inlet sizes.
3. Terminal units.
4. Position of balancing devices.
E. Fan-Coil-Unit Test Reports: For fan-coil units with coils, include the following:
1. Unit Data:
a. Unit identification.
b. Location.
c. Make and type.
d. Model number and unit size.
e. Manufacturer's serial number.
f. Unit arrangement and class.
2. Motor Data:
a. Horsepower and rpm.
b. Volts, phase, and hertz.
c. Full-load amperage and service factor.
3. Test Data (Indicated and Actual Values):
a. Total airflow rate in cfm (L/s).
b. Total system static pressure in inches wg (Pa).
c. Fan rpm.
d. Discharge static pressure in inches wg (Pa).
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e. Filter static-pressure differential in inches wg (Pa).
f. Coil static-pressure differential in inches wg (Pa).
g. Outdoor airflow in cfm (L/s).
h. Return airflow in cfm (L/s).
i. Outdoor-air damper position.
j. Return-air damper position.
F. Apparatus-Coil Test Reports:
1. Test Data (Indicated and Actual Values):
a. Airflow rate in cfm (L/s).
b. Average face velocity in fpm (m/s).
c. Air pressure drop in inches wg (Pa).
d. Outdoor-air, wet- and dry-bulb temperatures in deg F (deg C).
e. Return-air, wet- and dry-bulb temperatures in deg F (deg C).
f. Entering-air, wet- and dry-bulb temperatures in deg F (deg C).
g. Leaving-air, wet- and dry-bulb temperatures in deg F (deg C).
h. Refrigerant expansion valve and refrigerant types.
i. Refrigerant suction pressure in psig (kPa).
j. Refrigerant suction temperature in deg F (deg C).
G. Fan Test Reports: For supply, return, and exhaust fans, include the following:
1. Fan Data:
a. System identification.
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b. Location.
c. Make and type.
d. Model number and size.
e. Manufacturer's serial number.
f. Arrangement and class.
g. Sheave make, size in inches (mm), and bore.
h. Center-to-center dimensions of sheave and amount of adjustments in inches (mm).
2. Motor Data:
a. Motor make, and frame type and size.
b. Horsepower and rpm.
c. Volts, phase, and hertz.
d. Full-load amperage and service factor.
e. Sheave make, size in inches (mm), and bore.
f. Center-to-center dimensions of sheave, and amount of adjustments in inches
(mm).
g. Number, make, and size of belts.
3. Test Data (Indicated and Actual Values):
a. Total airflow rate in cfm (L/s).
b. Total system static pressure in inches wg (Pa).
c. Fan rpm.
d. Discharge static pressure in inches wg (Pa).
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e. Suction static pressure in inches wg (Pa).
H. Round, Flat-Oval, and Rectangular Duct Traverse Reports: Include a diagram with a grid
representing the duct cross-section and record the following:
1. Report Data:
a. System and air-handling-unit number.
b. Location and zone.
c. Traverse air temperature in deg F (deg C).
d. Duct static pressure in inches wg (Pa).
e. Duct size in inches (mm).
f. Duct area in sq. ft. (sq. m).
g. Indicated airflow rate in cfm (L/s).
h. Indicated velocity in fpm (m/s).
i. Actual airflow rate in cfm (L/s).
j. Actual average velocity in fpm (m/s).
k. Barometric pressure in psig (Pa).
I. Split System Reports:
1. Unit Data:
a. System and air-handling unit identification.
b. Location and zone.
c. Apparatus used for test.
d. Area served.
e. Make.
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f. Number from system diagram.
g. Type and model number.
h. Size.
i. Effective area in sq. ft. (sq. m).
2. Test Data (Indicated and Actual Values):
a. Airflow rate in cfm (L/s).
b. Air velocity in fpm (m/s).
c. Preliminary airflow rate as needed in cfm (L/s).
d. Preliminary velocity as needed in fpm (m/s).
e. Final airflow rate in cfm (L/s).
f. Final velocity in fpm (m/s).
g. Space temperature in deg F (deg C).
J. Instrument Calibration Reports:
1. Report Data:
a. Instrument type and make.
b. Serial number.
c. Application.
d. Dates of use.
e. Dates of calibration.
14.01 VERIFICATION OF TAB REPORT
A. The TAB specialist's test and balance engineer shall conduct the inspection in the presence of
Owner’s representative.
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B. Owner’s representative shall randomly select measurements, documented in the final report, to
be rechecked. Rechecking shall be limited to either 10 percent of the total measurements
recorded or the extent of measurements that can be accomplished in a normal 8-hour business
day.
C. If rechecks yield measurements that differ from the measurements documented in the final
report by more than the tolerances allowed, the measurements shall be noted as "FAILED."
D. If the number of "FAILED" measurements is greater than 10 percent of the total measurements
checked during the final inspection, the testing and balancing shall be considered incomplete
and shall be rejected.
E. If TAB work fails, proceed as follows:
1. TAB specialists shall recheck all measurements and make adjustments. Revise the final
report and balancing device settings to include all changes; resubmit the final report and
request a second final inspection.
2. If the second final inspection also fails, Owner may contract the services of another TAB
specialist to complete TAB work according to the Contract Documents and deduct the
cost of the services from the original TAB specialist's final payment.
3. If the second verification also fails, Owner may contact AABC Headquarters regarding
the AABC National Performance Guaranty.
F. Prepare test and inspection reports.
15.01 ADDITIONAL TESTS
A. Within 90 days of completing TAB, perform additional TAB to verify that balanced conditions are
being maintained throughout and to correct unusual conditions.
B. Seasonal Periods: If initial TAB procedures were not performed during near-peak summer and
winter conditions, perform additional TAB during near-peak summer and winter conditions.
END OF SECTION 230593
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SECTION 23 07 13
MECHANICAL INSULATION
PART 1 - GENERAL
1.01 DESCRIPTION
A. Provide complete systems of insulation for piping, ducts, and equipment.
B. Non-insulated Ductwork, Casings, Plenums and Housings:
1. Where sound lining in non-critical or non-sensitive areas is of minimum thickness and K-
value specified for thermal insulation.
2. Return Air Ductwork:
a. Exposed in air-conditioned spaces.
1.02 QUALITY ASSURANCE
A. Requirements of Regulatory Agencies:
1. NFPA -90A, Air Conditioning and Ventilating Systems.
2. NFPA – 255,
B. Reference Standards:
1. ASC-A-7001C Standards for Adhesives for Duct Liner.
2. E-84 Standard Test Method for Surface Burning Characteristics of Building Materials.
3. SMACNA - Duct Liner Application Standard.
4. UL - 723 Tunnel Test.
C. Quality Control: Work not in accordance with these Specifications, damaged, or incorrectly
installed shall be removed and/or repaired and replaced as directed.
1.03 SUBMITTALS
A. Submit under provisions of General Conditions and Division 1 as applicable.
B. Product Data: Provide product description, list of materials, thickness for each service,
performance curves and thermal ratings.
PART 2 - PRODUCTS
2.01 MANUFACTURERS
A. Fiberglass Insulation
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1. Owens-Corning Fiberglas Corp.
2. Certain-Teed.
3. The Manville Corp.
4. Or equal.
B. Flexible Elastomeric Insulation:
1. Armstrong Armflex II.
2. Rubatex.
3. Halstead.
4. Or equal.
C. Fiberglass Pre-Molded Pipe Fitting Covers Insulation.
1. Insul-Coustic/Birma Products co.
2. Childers Products Co.
3. Speedline
4. Zeston.
5. Or equal.
D. Adhesives:
1. Foster Div. Products, Inc.
2. Insul-Coustic.
3. 3M.
4. Childers Products Co
5. Miracle.
6. Or equal.
E. Weld Pins:
1. Nelson Stud Welding Div. TRW, Inc.
2. Duro-Dyne Corporation.
3. Miracle.
4. Tuff-Weld.
5. Grip Nail.
6. Or equal.
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2.02 MATERIALS
A. Insulation, jackets, facings, adhesives, coating, and accessories fire hazard rated in accordance
with the requirements of UL 723, ASTM E-84, and NFPA 255.
Show ratings on products, carton labels or verify by a report from an approved independent
testing laboratory.
1. Flamespread: Maximum 25.
2. Fuel Contributed and Smoke Developed: Maximum 50.
3. Flameproofing treatments are not acceptable.
4. Underwriters Laboratories, Inc. listed.
B. Insulation:
1. Fiberglass: Type 25 ASJ/SSL pipe covering.
a. Molded: Heavy density, maximum 0.23 K factor at 75 degrees F mean temperature.
b. Blanket: Minimum 1-pound density maximum 0.27 K factor at 75 degrees F mean
temperature.
c. Board: Density as noted, maximum 0.24 K factor at 75 degrees F mean
temperature.
2. Calcium Silicate:
a. Asbestos free, 0.42 K factor at 200 degrees F. Maximum service 1,200 degrees F.
3. Flexible Elastomeric Insulation:
a. K = 0.27 and 75 degrees F mean temperature.
4. Styrofoam:
a. 1.9 PCF, K = 0.24 at 40 degrees F.
5. Insulation for Valves Fittings, Flanges and Accessories shall include:
a. Pre-molded fiberglass, PVC or aluminum fitting covers.
b. Radial mitered segments of pipe insulation.
c. Fiberglass blanket.
d. Built-up coat of insulating and finishing cement.
e. Finishes: As specified under Part 3 - Execution.
C. Jackets and Fittings:
1. Piping Jackets (for all piping exposed to weather).
a. Glass-clad 0.01-inch stainless steel.
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b. 0.016-inch thick stucco embossed aluminum.
c. Foil: Skrim Kraft Laminate.
d. Glas-Skrim reinforcing.
e. Kraft paper packing.
f. Laminate of white Kraft facing.
g. For sealing joints, see Part 3 - Execution.
h. Aluminum insulation covers, Childers model ELL-JACS or equal.
2. Ductwork and Equipment Facings:
a. Foil-skrim-kraft laminate of aluminum foil facing or glass skrim reinforcing.
b. Internal Insulation: NFPA-90A coating on side facing air stream, suitable for velocity
of 4,000 fpm. For use in noncritical or nonsensitive areas only unless approved
impervious membrane is applied between airstream and insulation.
D. Adhesives and Coatings:
1. Foster Product Names and Figure Numbers as follows:
a. Lagging Adhesive: 30-36 UL label.
b. Vapor-Barrier Coating: Tite-fit 30-35 UL label.
c. Vaporseal Adhesive: Spark-fas 85-20 UL label.
d. Duct Adhesive: Spark fas 85-20
e. Outdoor Mastic: Monolar mastic 60-38 UL label.
E. Wire, Banding and Fastening Devices:
1. Wire: Minimum 16-gauge copper-clad annealed steel wire or minimum 16 gauge soft
annealed stainless steel wire.
2. Bands: 3/8-inch nominal width, of 26-gage stainless steel.
3. Staples: Outward clinching type of corrosion-resistant steel.
4. Weld pins to Support and Fasten Duct Insulation: Minimum 1/8-inch diameter with speed
washer or integral flange of minimum 1-3/8 inches diameter.
F. Piping Insulation: Type as shown for services listed in schedule.
1. Type P-1: Refrigerant Line Insulation.
a. Fiber-free, formaldehyde-free, low VOC and non-particulating formulation.
b. Built-in vapor barrier
c. Microban antimicrobial
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d. 25/50 rated
e. Available up to 2” wall and 10” ID.
f. Insulation thickness per California Energy Code and Mini-split/VRF system
guidelines.
2. Type P-2: Polyurethane 1" Dow TRYMAR 95/01 Styrofoam, all service or all-purpose
jacket, vapor sealed.
G. Ductwork, Casings, Housings and Plenums Insulation: Type as scheduled for services listed.
1. Type D-1: Flexible fibrous glass blanket with vapor barrier.
a. Density, thickness and thermal conductivity per Duct Insulation Application
Schedule.
b. Factory Applied Jacket:
1) Foil-skrim-kraft laminate:
a) Aluminum foil facing.
b) Glass skrim reinforcing.
c) Kraft paper backing.
2) Maximum vapor permeance: 0.02 perms.
3) One 2-inch flange.
2. Type D-2: Rigid fibrous glass ductboard with vapor barrier, Type 300.
a. Density, thickness and thermal conductivity in accordance with Duct Insulation
Application Schedule.
b. Factory-applied Foil-Scrim-Kraft laminate jacket.
c. Open weave glass cloth set in and covered with mastic.
PART 3 - EXECUTION
3.01 Installation
A. General:
1. Provide insulation as required for equipment whether furnished with equipment or not.
2. Before applying insulation:
a. Test piping and ductwork for tightness; obtain review and acceptance.
b. Clean surfaces of dust, grease and foreign matter.
3. Butt edges neatly, ASJ jacket with 3-inch minimum butt strips.
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4. Fill voids with insulating cement.
5. Longitudinal Overlaps:
a. 2 inches minimum, self-sealing.
b. For exposed work: toward ceiling or wall.
6. Continuous insulation passing through pipe hangers, supports and sleeves or other
openings, except underground sleeves.
7. Metal frames to protect edges of openings in insulation.
8. Insulate fittings with molded Fiberglass or OC No. 10 insulating cement of equal thickness
to that of adjoining insulation and finished with a one-piece fitting cover.
9. Valves, Fittings, Flanges and Accessory Insulation:
a. Unless otherwise shown or specified, insulate:
1) Valves, including bonnets.
2) Fittings.
3) Strainers.
4) Expansion joints.
5) Specialties.
b. Insulation for strainers, blowdown valves, balancing valves, drains, expansion
joints, fittings, and accessories requiring servicing or inspection:
1) Insulation shall be removable and replaceable without damage.
2) Enclose within two-piece covers or single piece removable cover.
3) Provide means to secure in place but allow removal for service.
c. Insulation of same thickness as that of adjacent piping insulation.
10. At pipe hangers:
a. Insulation protection saddles and shields.
b. Embed no hangers in insulation.
c. Fill saddle with calcium silicate insulation where fiberglass insulation is used, for
heating water piping. Use polyurethane inserts for chilled water.
d. Pipes 2-inch and smaller shall run insulation materials through hander with
protection saddles.
11. At fire- and smoke-rated wall and floor penetrations:
a. Bare Pipe: fire chalk penetrations.
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b. Insulated Pipe: fire chalk between insulation and penetration or sleeve.
c. Submit UL listed details clearly marked to indicate where each detail applies for
approval.
B. Jackets and Facings:
1. Vapor sealed types: continuous. Staples not permitted.
2. For piping:
a. Seal longitudinal laps.
b. Adhere 3-inch wide joint strip, of same material as facing, at center of each butt
joint.
c. Adhesives:
1) Vapor sealed insulation: Vapor seal adhesive.
2) Heating service insulation: Vapor seal adhesive.
d. Exposed to weather: Metal jackets as specified.
3. For ducts, plenums, casings, housings and equipment.
a. Vapor seal fibrous glass blanket:
1) 2-inch lap strip at one end.
2) Peel insulation for 2-inch lap strip along longitudinal joints.
3) Seal lap strips with vapor seal adhesive.
b. Fibrous glass board: Seal joints and breaks in facings with 4 inch wide tape to
match facing and adhere with vapor seal adhesive.
C. Adhesives and Coatings:
1. Apply in accordance with manufacturer's recommendations.
2. Adhere jackets and facings with wet coat of adhesive.
3. Lap sealing: 4 inches.
4. Surfaces to be adhered: Completely coated with adhesive.
D. Wiring, Banding and Fastening Devices:
1. Secure insulation to piping, ductwork and equipment in accordance with the following
minimum requirements:
a. Piping insulation section 3 feet long.
1) Concealed vapor sealed insulation banded at ends and center.
2) Other concealed insulation banded at ends and center.
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b. Piping fittings insulation:
1) Loops of wire to secure mitered segments of simulation.
2) Wire spiraled on from end to end-on blanket insulation.
c. Outdoor piping:
1) Band weatherproof metal jackets at each circumferential joint and center of
each 2-foot section.
2) Set bands in mastic.
3) Caulk joints vapor tight.
d. Ductwork Mechanical Fasteners:
1) Weld pins and adhered anchors.
2) Spacing: Minimum 12-inch centers and minimum two rows per side of cut.
3) Maximum permissible load:
a) 5 pounds for 2 inch by 2-inch base plate.
b) 10 pounds for 2-3/4 inch by 2-3/4 inch base plate.
4) Clip off pin penetrations flush with insulation d-surface or facing.
5) Seal pins and washers:
a) With 2 inch square pieces of vapor barrier material to match facing.
b) Adhere with vapor seal adhesive.
e. Where round ducts are specified to be lined, use one of the following m ethods:
1) Line ducts as specified.
2) Insert prefabricated circular fiberglass lining.
E. Thermal Hanger Shields:
1. Tape butt joints where pipe insulation butts up against hanger shield. On hot piping, apply
3-inch wide canvas strip dipped in lagging adhesive over the butt joints.
F. Plenum and Duct Insulation:
1. Insulate supply ducts and designated parts of exhaust, return and fresh air intake ducts.
Comply with published recommendations of manufacturer.
2. Unless otherwise shown, apply insulation externally.
3. Ensure insulation is continuous through inside walls.
4. Finish insulation neatly at hangers, supports and other protrusions.
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5. Locate insulation or cover seams in least visible locations.
6. Where ducts run in groups too close to be individually insulated and finished:
a. Completely fill spaces between ducts with rigid or flexible insulation material.
b. Insulate and finish exterior surfaces of groups as specified for particular service.
7. Where ducts cannot be insulated after erection, insulate prior to installation.
8. Where specified thickness of insulation exceeds available thickness in single layer,
provide insulation in 2 or more layers with joints staggered.
9. Preparation:
a. Do not install covering before ductwork and equipment have been tested and
approved.
b. Ensure surface is clean and dry prior to installation.
c. Ensure insulation is dry before and during application.
10. Board: Use in mechanical rooms and in locations where ducts are exposed to view except
where prohibited by code. Fiberglass Type D2 (see Part 2 - Products, Materials).
11. Wrap: Use in concealed locations. Fiberglass-faced duct wrap insulation.
a. Application, Rectangular Duct:
1) Apply the duct wrap over clean, dry sheet metal ductwork that has been
sealed airtight at seams and joints.
2) Install duct wrap to allow maximum fullness at corners (avoid excessive
compression). Minimum thickness at corners is 1 inch.
3) Butt insulation tightly at joints.
4) Secure with 4-inch strips of adhesive at 8 inches on center, 2-inch lap strip at
one end.
5) Apply with 1 percent coverage of adhesive, similar to Foster's 85-15.
6) Overlap vapor barrier facing a minimum of 2 inches. Remove insulation from
lap prior to stapling.
7) Staple vapor barrier seams approximately 6 inches on center with outward
clinching staples, and seal lap strips with a foil vapor barrier tape, or vapor
barrier mastic.
8) When ducts are over 24 inches in width, additionally secure the duct wrap to
the bottom of rectangular ducts with mechanical fasteners spaced on 12 inch
centers, but not less than one pin on each surface, to prevent sagging of
insulation.
9) Seal penetration of facing to provide a vapor tight system.
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MECHANICAL INSULATION 230713 - [10]
b. Rigid board wrap: In mechanical and electrical rooms and out-of-doors except
where internally lined. Insulate sound traps.
1) In addition to above general requirements:
a) Secure with mechanical fasteners spaced 12 inches on centers or as
required to hold insulation firmly to duct.
b) Seal joints and pin penetrations with pressure sensitive aluminum foil
tape. Reinforce exposed edges with corner bead.
c) Apply tack coat mastic or asphalt emulsion equal and layer of open
weave glass cloth into coating, overlapping seams at least 2 inches.
d) Apply finish coat of mastic to entire fabric surface at rate of 25 square
feet per gallon.
Apply final coat of asphalt-based aluminum paint when mastic is dry for
out-of-door.
c. Application, Round or Oval Duct:
1) Apply duct wrap over clean, dry ductwork after ductwork has been made
airtight at seams and joints.
2) Install insulation to allow full thickness.
3) Butt insulation tightly at joints, and overlap vapor barrier facing a minimum of
2 inches.
4) Remove insulation from overlap prior to stapling.
5) Staple vapor barrier seams approximately 6 inches on center with outward
clinching staples, and seal with a foil vapor barrier tape or vapor barrier
mastic.
12. Duct liner: Use where specifically shown or scheduled and only where allowed by code.
a. Fiberglas Aeroflex Duct Liner - Application:
1) Completely cover portions of duct designated to receive duct liner with
Aeroflex Duct Liner.
2) Neatly butt transverse joints with no interruptions or gaps.
3) Face the black-coated surface of the Aeroflex Duct Liner to the airstream.
4) Apply with 100 percent coverage of Foster's 81-99 adhesive. Use Tuffwell
nylon pins or gripnail fasteners at 12 inches on center, but not less than one
pin on each surface of duct.
5) Comply with SMACNA Duct Liner Application Standard, published
recommendations of manufacturer, and as specified.
6) Cut Aeroflex Duct Liner to assure overlapped end compressed longitudinal
corner joints.
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MECHANICAL INSULATION 230713 - [11]
7) Surface adjacent to air flow, including at joints, to be uniformly flat.
8) Seal butt joints with Foster GPM 35-00 and exposed edges of liner to present
erosion. Tape seams and joints with Arabol and canvas.
9) Provide 24 gauge sheet metal Z Sections frames over edge of insulation in
rectangular ducts as follows:
a) Around access openings in ducts.
b) Around access door in plenums.
c) Along edges exposed to airflow.
d) At leading edges.
3.02 Schedule pipes and equipment
SERVICE
TYPE
SIZE
(Inches)
THICKNESS
(Inches)
A. Refrigerant:
1. Liquid Line P-1
P-1
1 and smaller
1 ½” and larger
¾
1
2. Suction Line P-1
¾“ and smaller
1” and larger
1
1½
3. Hot Gas P-1
1 and smaller
1 ½” and larger
¾
1
B. Horizontal condensate drains concealed in
building or plenum
P-2 All ¾
All insulation shall be per above table, C.E.C. Title-24, and per VRF system manufacturer’s installation
guidelines. Most stringent shall apply.
3.03 DUCT AND PLENUM INSULATION
A. Duct Insulation Type and Thickness Schedule:
1. Type 1 DW: Installed conductance 0.48-Btu per hour per square foot per degree F., 1-1/2
inch thick duct wrap.
2. Type 2 DW: Installed conductance 0.24-Btu per hour, per square foot per degree F., 2-
inch thick duct wrap.
3. Type 3-DW: Installed conductance 0.48-Btu per hour per square foot per degree F., 1-1/2
inch thick rigid board duct wrap, 3 pounds per cubic foot, glass cloth and mastic, FSK.
4. Type 4-DW: Installed conductance 0.24-Btu per hour per square foot per degree F., 2
inch thick rigid board duct wrap, 3 pounds per cubic foot, glass cloth and mastic, FSK,
aluminum paint.
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B. Application Schedule:
ITEM SUPPLY RETURN EXHAUST
In Mechanical and Electrical Rooms:
Serving All areas
1) Upstream Final Filters 2-DW 2-DW -
2) Downstream Final Filters 2-DW - -
Out-of-Doors:
Serving All Areas
1) Upstream Final Filters 4-DW 4-DW -
2) Downstream Final Filters 4-DW*** - -
Other areas:
From terminal boxes 20 feet downstream
1) All Areas 1-DW - -
From non-sensitive supply fans 20 feet
downstream
2-DW - -
From return fans 20 feet upstream and
exhaust fans 20 feet upstream and
downstream
- 1-DW -
Other plenums 1-DW 1-DW -
Interconnecting air outlets in different rooms
less than 10 feet apart
- 1-DW -
Fan coil discharges and intakes
1) All Areas 1-DW 1-DW -
Other concealed supply and return 1-DW 1-DW -
Exposed ductwork in conditioned spaces - - -
Fresh air intake ducts in building 1-DW - -
* Provide addition 16 ga, 1/2-inch hardware cloth liner, securely fastened.
** Do not line duct.
*** Unless specified or indicated otherwise on plans or hereinafter.
END OF SECTION 23 07 13
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CUSTOM PACKAGE UNIT 23 73 00 – [1]
SECTION 23 73 00
CUSTOM M ULTIZONE PACKAGE UNIT
PART 1 - GENERAL
1.01 W ORK INCLUDED
A. Custom air handling units in accordance with the equipment schedules and
specif ications.
1.02 REFERENCES
A. AFBMA 9 – Load Ratings and Fatigue Life for Ball Bearings.
B. AFBMA 11 – Load Ratings and Fatigue Life f or Roller Bearings.
C. AMCA 99 – Standards Handbook.
D. AMCA 210 – Laboratory Methods of Testing Fans f or Rating Purposes.
E. AMCA 300 – Test Code for Sound Rating Air Moving Devices.
F. AMCA 301 – Method of Publishing Sound Ratings for Air Moving Devices.
G. AMCA 500 – Test Methods f or Louver, Dampers, and Shutters.
H. ARI 410 – Forced-Circulation Air-Cooling and Air-Heating Coils.
I. ARI 435 – Application of Central-Station Air-Handling Units.
J. NEMA MG1 – Motors and Generators.
K. NFPA 70 – National Electrical Code.
L. SMACNA – HVAC Duct Construction Standards - Metal and Flexible.
M. UL 900 – T est Performance of Air Filter Units.
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1.03 SUBMITTALS
A. Submit shop drawings and product data as applicable.
1. Shop Drawings: Indicate assembly, unit dimensions, weight loading, required
clearances, construction details, f ield connection details, and electrical
characteristics and connection requirements.
2. Product Data
a. Provide literature that indicates dimensions, capacities, ratings,
perform ances, gauges and f inishes of materials, and electrical
characteristics and connection requirements.
b. Provide data of filter media, performance, framing and assembly.
c. Provide fan curves with specif ied operating point clearly plotted.
d. Provide coil selection with performance data
e. Provide pressure drop calculation report indication the internal pressure loss
and available external loss
f. Submit sound power level data for f an outlet, fan inlet and casing
radiation at rated capacity.
g. Submit electrical requirements f or power supply wiring including wiring
diagrams for interlock and control wiring, clearly indicating factory-installed
and field-installed wiring.
h. Submit performance, noise and vibration test results of the air handling
unit as required by specif ications. Provide test results for review prior to
any air handling unit shipment to the job site.
1.04 OPERATION AND MAINTENANCE DATA
A. Submit installation, startup, operation and maintenance data.
1. Maintenance Data: Include instructions f or lubrication, filter replacement, motor
and drive replacement, spare parts lists, and wiring diagrams.
2. Include manuf acturer's installation instructions.
1.05 QUALIFICATIONS
A. Manuf acturer: Company specialized in manufacturing goods as specif ied in this section
who issues complete catalog data on fabricated AHUS.
1.06 SCOPE OF W ORK
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A. T he AHU Manufacturer’s work shall include, but is not necessarily limited to the following:
1. Furnish a complete set of submittals as described hereinafter with a package VRF
Condenser and BC Controller within the unit.
2. Provide AHUs fully factory assembled with the exception of unit splits as required for
shipping or installation requirements as determined by the installing contractor. As
shipped from the AHU Manufacturer, AHUs shall meet the performance requirements
shown on the equipment schedule. Units shall be for outdoor application and shall
include components with the options as indicated on the schedule or drawings.
Furthermore, units shall be constructed as detailed hereinafter. Field-provided
components and options shall be unacceptable unless otherwise noted.
3. Provide all labor, materials, and equipment necessary for the complete engineering,
production, factory assembly, factory testing, packaging, and delivery of the custom
AHUs and their related equipment. Install control end devices and unit controllers
(provided by the controls contractor and factory mounted and wired).
4. Permit the Owner and Engineer to inspect as herein described and to witness
performance tests to ensure good product quality and compliance with these
specifications.
5. Factory test all AHUs as detailed herein and on the schedule.
6. Provide a factory-authorized service representative employed by the AHU
Manufacturer to supervise installation and start-up of the units as herein described.
7. Provide Owner's Manual, complete operating instructions.
B. Mechanical Contractor whose work will generally include the following:
1. Receive and unload the custom AHUs. Inspect the unit sections as they arrive on the
job site. Notify the trucking company, AHU Manufacturer, and Owner of any shipping
damage immediately.
2. Coordinate all work associated with the AHU installation.
3. Schedule with the AHU Manufacturer for an authorized service person employed by
the AHU Manufacturer to supervise unit installation. Clear entire area where unit is
to be set of any construction materials debris. Ensure equipment curbs or support
platforms are level prior to setting the units. Hoist and set units in their proper
position. Use spreader bars to hoist the unit (sections) to avoid damaging units. If
units ship in multiple sections, provide all labor and equipment for placing and
f ield joining sections.
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4. Provide all final drain piping connections. Release the fan spring isolator shipping
restraints if provided.
5. Remove all foreign objects and thoroughly clean the interior and exterior surfaces of
the units with a mild detergent (soap and water). Do not use any abrasives or
solvents without first consulting the AH Manufacturer.
6. Install filter media in filter frames. Operating units without filter media is strictly
prohibited.
7. Perform unit start up as detailed herein under the guidance and supervision of a
factory-authorized service person employed by the AHU Manufacturer.
C. Electrical Contractor work will generally include the following:
1. Provide wiring between Owner’s normal/emergency power source and the units.
2. Perf orm unit start up as detailed herein under the guidance and supervision of
a factory-authorized service person employed by the AHU Manuf acturer.
1.07 DELIVERY, STORAGE, AND HANDLING
A. Deliver, store, protect and handle products to site under provisions of General Conditions
and Division 1 as applicable.
B. Accept products on site in factory-fabricated protective containers, with factory-installed
shipping skids and lifting lugs. Inspect for damage.
C. Store in clean dr y place and protect from weather and construction traffic. Handle
carefully to avoid damage to components, enclosures, and finish.
1.08 ENVIRONMENT AL REQUIREMENTS
A. Do not operate units for any purpose, temporary or permanent, until ductwork is clean,
filters are in place and fan has been test run under observation.
1.09 BID REQUIREMENTS
A. T he AHUs shall meet the performance criteria as indicated on the schedule and
drawings.
B. AHU Manuf acturer base of design is Alliance Air Products.
C. Any AHU Manuf acturer not listed above must obtain approval in writing from the Engineer
no less than 2 weeks before the bid date. The Mechanical Contractor shall be responsible
for all additional costs incurred by the Engineer during the submittal and re-submittal
phases for any contract awarded to a manuf acturer not on the approved list.
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D. All AHU Manufacturer’s that are not basis of design shall deliver selection data to the bid
examiner. Selection shall include the following:
1. Fan perf ormance curves, coil perf ormance, and unit discharge, inlet, and
certified radiated sound power levels.
2. Unit casing thermal performance at design supply air temperature graphed on a
psychometric chart.
3. A list of all exceptions and clarifications the AHU Manufacturer is taking to the
specifications.
E. To ensure injected closed-cell foam is properly engineered for rigidity and thermal
performance, is amply applied to fill all cavities within each assembly, and is correctly cured
to yield strong adhesion to casing members, the AHU Manufacturer shall have experience
using injected closed-cell foam as an insulation in AHUs for no less than 5 years.
F. Mechanical contractor shall carry full responsibility for any AHU equipment that don’t fit or
don’t meet the acoustical requirements of each designated area, at its own expense
acoustical traps or leak test shall be done for any f ield modif ication.
G. Contractor shall bare additional cost for new structural & acoustical calculations by using
another listed brand.
1.10 W ARRANT Y AND SERVICE
A. AHU Manuf acturer shall provide a parts warranty extending 12 months from start-up or
18 months from shipment, whichever comes first.
B. T he AHU Manufacturer shall have a service department located within
50 miles of the job site, and 4 hour response 24/7.
1.11 QUALITY ASSURANCE
A. Conform to space and access requirem ents; units which do not conform to space and
access requirements will not be accepted.
B. Insulation and insulation adhesive shall comply with NFPA 90A Requirements for flam e
spread and smoke generation.
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CUSTOM PACKAGE UNIT 23 73 00 – [6]
PART 2 - PRODUCTS
2.01 MANUFACTURERS
A. Alliance Air products .
B. Approved Equal.
2.02 FABRICATION
A. Unit Base: Perimeter of unit base shall be constructed from 8 inch aluminum structural ‘C’
channel. Internal supports shall consist of structural rectangular tubing on minimum 24”
centers. All fans and coils shall be supported on minimum ¼” thick structural tubular
aluminum. The unit base shall be fully welded. Height and section of structural members
shall take into account internal loading, unit height, length and width, and split sections so
as to limit base deflection to 1/200 of span. Curb mounted units shall be provided with curb
angle welded on inside of structural base.
1. Prior to welding, all structural ‘C’ channels shall be sandblasted to remove rust and
mill scale. W ire brushing or chemical treatment is not acceptable.
2. Structural type removable lifting lugs shall be added to the perimeter channel along
the longest length of the unit. Removable type lifting lugs shall be provided with
welded attachments. Provide a minimum of 4 lugs per section to ensure proper
rigging.
3. Unit floor shall be covered with min. 0.063” thick aluminum tread plate floors in all
sections. The floor shall be supported by stringers and structural members on
maximum 24” centers. All seams shall be supported underneath by structural
supports. Floor shall be attached to base structure by welding from underneath on
maximum 6” centers. Floor seams shall consist of minimum 1” standing seams,
caulked and covered with cleats to ensure water and air tightness. Penetrations
through unit floor are not acceptable.
4. Isolator support (if required) shall be attached to base structural members with
minimum 3/8” grade 5 bolts. Welding to the floor skin is not acceptable.
5. Coil drain pans shall be supported by structural aluminum members under the floor.
B. Unit Housing: Unit air leakage shall not exceed 1.0% of design cfm at 1.5 times design
static pressure up to +12.0” w.g. in all positive-pressure sections and -12.0” w.g. in all
negative-pressure sections. Leakage shall be calculated by totaling all leakage either into or
out of the unit.
1. The unit housing side and roof panels shall be constructed of 0.063” thick aluminum
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Azusa, CA 91702 Custom Multizone Package Unit
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outer panels, and shall utilize a standing seam modular panel type construction.
Wall assemblies shall be double-wall construction with textured aluminum solid
exterior and smooth 0.025” thick aluminum interior. The entire unit shall have a solid
wall liner on the interior. All spaces and joints of wall assemblies shall be completely
sealed. Wall shall meet the casing deflection limits contained herein. Thermal break
construction provided for the entire Aluminum casing with minimized metal to metal
contact between interior and exterior for avoiding condensation.
2. The panels shall be attached to each other, to the roof, and to the floor using bolts
so that all panels are removable. All seams shall be sealed with a high strength
polyurethane sealant prior to assembling the panels. After assembly, exterior
panel seams shall be f illed with acrylic latex caulk for appearance. Bolting shall be
zinc plated ¼-20 on maximum 8” centers. Sheet metal or ‘Tek’ fasteners are not
acceptable f or sealing pressure containing panels.
a. Fan sections shall include perforated interior sheet metal liners in fan blast area.
b. Cooling coil shall include 20 gauge 304 stainless steel liners. Insulation in sections
lined with perforated sheets shall be faced with neoprene.
c. All floor openings shall have 1" minimum flange up around entire perimeter.
d. Roof shall be sloped at ¼” per foot for all exterior units. Slope must be
maintained after installation.
3. Access doors shall be provided full height (60”) where unit height permits, and
shall be 24” wide where section length permits, otherwise m inim um of 18” shall
be used. Doors shall be 2” thick, double wall and insulated type. Door insulation
shall be injected urethane foam with a minimum R value of 13-Ft2-°F/BTU. Door
frames shall be heavy alum inum extrusion with one-piece, closed cell,
replaceable santoprene gasket seal.
4. Door hinges shall be die-cast zinc with provision for adjustment without the use
of shims or special tools. Door latches and Handles are to be bolted to the unit
and made with corrosion resistant materials. Bolts, nuts and shaft s for door
latches, handles and hinges shall be made of zinc plated steel. Door latch and
pawl assembly shall be industrial quality and corrosion resistant with a handle on
both the inside and outside of door. Latching mechanism shall be of conical roller
design. Latch and pawl assembly shall be b olted together without the use of set
screws allowed.
5. All doors to fan sections shall be provided with latches which require a tool to
open.
6. Viewing windows shall have double thermal pane wire reinf orced safety glass.
7. Under scheduled supply air temperature and design conditions on the exterior of
the unit of 92°F dry bulb and 68°F wet bulb, condensation shall not form on the
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CUSTOM PACKAGE UNIT 23 73 00 – [8]
casing exterior. The AHU Manufacturer shall provide tested casing thermal
perf ormance for the scheduled supply air temperature plotted on a psychometric
chart. The design condition on the exterior of the unit shall also be plotted on the
chart. If tested casing thermal data is not available, AHU Manufacturer shall
provide, in writing, a guarantee against condensation forming on the unit exterior
under the scheduled supply air temperature and design conditions on the exterior of
the unit of 79°F dry bulb and 68°F wet bulb. The guarantee shall note that the AHU
Manufacturer will cover all expenses associated with modif ying units in the field
should external condensate form on them. Copies of the guarantee shall be
provided to the Engineer and the Owner.
C. Insulation: W all and ceiling panels shall be insulated with 2”-3#/cu.ft. Fiberglass insulation
with 0.032” inch thick aluminum liner. Insulation under solid lining shall be unfaced;
otherwise, insulation shall be faced with an acrylic or neoprene coating. Insulation shall
be tested and rated per ASTM C 423 and NFPA-90a rated. Insulation shall have thermal
conductivity K factor of .24 Btu/Hr/Sq Ft/Degree F @ 75°F mean and the following sound
attenuation characteristics:
Octave Bands
125
250
500
1K
2K
4K
NRC
Absorption .15 .77 1.11 1.08 1.00 1.03 1.00
D. Insulation under floor shall be sprayed urethane foam with a minimum thickness of 2” and
a minimum aged R value of 11.5 Hr-Ft2-°F/BTU.
E. Paint Finish: Exterior wall and roof panels shall be coated with air dry acrylic polyurethane
to a minimum dry thickness of 3 mils. Finish shall have no blistering or rusting on
unscribed areas after min. 5,000 hours in accordance with ASTM B-117 salt fog test.
Entire structural aluminum base shall be primer painted with industrial grade epoxy
primer for total thickness of 4 mils.
F. Fans:
1. Approved m anufacturers: Twin Cities, or equal Alliance.
2. Plenum Fan Assem bly: Fan shall be SWSI arrangement 4 (Direct drive) as
indicated on the schedule. Shaft shall be sized not to exceed 75% of the first
critical speed at the m aximum speed for the fan class. Fan frame and base
shall be constructed of welded s tructural alum inum angle, and painted with 3
mils of indus trial grade water-based air-dry enamel. Each fan assembly shall
be trim balanced at the factory in accordance with ANSI 204-96, category BV-
5, to Balance Qualit y Grade G6.3. Fans shall be rated in accordance with
AMCA Standard 210 for air performance and AMCA 300 for sound. All fans
shall carry the AMCA certification label.
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a. Fan motors shall be connected to individual motor overloads and contactors.
b. Fan Assembly Isolation Base: Fan and motor shall be mounted on an integral fully
welded structural steel base. Base shall be free floating at all four corners on
spring type isolators with earthquake restraints rated for Seismic Risk Category II
as defined in the IBC requirements. Isolators shall be directly attached to structural
base members. Isolator spring deflection shall be 2 inches minimum.
c. Motors and Drive: Furnish premium-efficiency ODP, NEMA frame, Motor
horsepower shall be in accordance with the schedule and are maximum allowable.
Motors minimum service factor shall be 1.15 and motors shall not be selected to
operate in the service factor. The motor shall be mounted on an adjustable motor
base with two adjusting bolts per side. The fan motors shall be factory wired to an
external VFD with flexible conduit of adequate length so that it will not have any
effect on the vibration isolation
d. Fan Air Flow Measuring Stations: The flow measuring station shall consist of total
pressure taps located in the inlet cone of each fan, with static pressure tap located
near fan inlet panel. Any flow measuring device which creates an obstruction in the
fan inlet is not acceptable. Transducer provided per each fan with to 5 VDC or 2-
wire 4 to 20 mA Analog Outputs compatible with EMS.
e. Each fan shall be provided with a heavy duty barometric backdraft damper for
units with multiple f ans within the same tunnel, to prevent bypass in the event
of individual f an failure.
G. VRF Coil Sections:
1. Approved m anufacturers: American Coil, Heatcraft, or equal.
2. Coil performance shall be provided as indicated on the schedule and drawings.
Coil capacities, pressure drops and selection procedures shall be certified to
AHRI Standard 410.
3. Coils shall have same-end header connections. W ater coils shall have non-
f errous headers. W ater coils shall have vent and drain taps and MPT
connections. Connection locations (handing) shall be as indicated on the
drawings. Grommets shall be provided at coil casing penetrations around the coil
piping. Grommets shall be designed to seal the opening under positive and
negative pressure.
4. VRF coils shall be provided as indicated on the schedule and drawings. Coils shall
have min. 0.006” thick Aluminum fins. Fins shall be mechanically bonded to min.
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3/8" OD seamless copper tubes with 0.014" thick walls. Fins shall have collars
drawn, belled and firmly bonded to the tubes by means of mechanical expansion.
All returns bends shall have a minimum wall thickness of 0.025” and shall be
brazed and individually removable. Hairpin return bends are not allowed. Coils shall
be circuited for counter-flow heat transfer. Coil casings shall be constructed of
stainless-steel grade 304.
5. The surface shall be die-formed of Aluminum fins with thickness as specified on the
equipment schedule. Fin spacing shall not exceed 12 fins per inch. Headers shall
be non-ferrous material, outside the airstream and provided with brazed male pipe
connections. Drain and vent fittings shall be provided for complete coil drainage. All
coil connections shall be extended to the exterior of the air handling unit.
6. All coils shall have counter flow construction with connections left or right hand. The
use of internal restrictive devices to obtain turbulent flow will not be accepted.
7. Coil casings shall be of minimum 16-gauge 304 stainless steel. Tube sheets
shall have extruded tube holes. All coil assemblies shall be tested under water at
300 psi and rated f or 150 psi working pressure.
8. Main drain pans are recessed 16-gauge 304 stainless steel with a double sloped
IAQ design to ensure complete condensate drainage. Primary drain pans shall
extend downstream of the coil bank for a minimum distance as indicated in the
drawings. Primary drain pans shall extend under each entire coil bank, including
headers and return bends. Primary drain pans shall be sloped a minimum of 1/8”
per f oot, shall be a minimum of 2” deep, and shall be double-sloped (sloped in 2
planes) to positively drain. Drain pans are insulated with 2” of urethane foam with
an R value of at least 11.5. The insulation is protected by a .063” thick aluminum
liner. Coils are to be installed above drain pan. Coils installed with coil casings in
the main condensate drain pans are not acceptable. Drain connections shall be of
the same material as the primary drain pan and shall extend a minimum of 1-1/2”
beyond the base to ensure adequate room f or f ield piping of condensate drain
traps. Drain connection locations (handing) shall be as indicated on the
schedule and drawings. Any coil support member located inside a primary drain
pan shall be of the same material as the drain pan.
9. Intermediate condensate pans are to be furnished on multiple coil units and single
coils greater than 48” high. The pans shall be use 16 Gauge 304 stainless steel
and shall extend under the entire coil, including headers and return bends.
Intermediate pans shall extend at least 6” in the direction of airflow and drain to the
main drain pan through copper downspouts.
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10. All coils shall be rated in accordance with ARI Standard 410.
H. Filter Sections: Filter sections shall be factory fabricated as part of the air handling unit.
Filters shall be arranged for upstream, downstream or side loading into Aluminum or
Galvanized steel filter frames. Provide filter holding frames to accommodate scheduled
filters. Filter rack shall be thoroughly caulked and sealed for minimal filter bypass.
1. Pre-Filter: 30 percent EFF, MERV 8.
2. Final Filter: 85 percent EFF, MERV 13
I. Damper Sections: Approved manufacturers: TAMCO, Ruskin. Dampers shall be low leakage
type with airfoil blade design. All dampers shall carry the AMCA Standard 500 certification
label. Air leakage through a 48” x 48” damper shall not exceed 10 CFM/ft².
1. Blade gasket shall be extruded EPDM elastomer secured in an integral slot
within the aluminum extrusion. Frame seals shall be extruded TPE
thermoplastic . Overlapping blade design shall compress seals to ensure tight
seal on closure.
2. Damper frame shall be extruded aluminum with a thickness of not less than .080”
and a depth of 4”. Pivot rods shall be 7/16” hexagon extruded aluminum
interlocking into blade section.
3. Bearings shall be double seal with an inner bearing fixed to the rod within a
polycarbonate outer bearing inserted into the frame so that the outer bearing
cannot rotate. Bearings shall be designed so that there is no metal to metal
contact.
4. Linkage hardware shall be installed outside of the frame and constructed of
corrosion resistant aluminum and zinc plated steel.
5. Multi-zone dual Deck damper for zone sizes as required
J. Louvers or weather Hoods: Louvers shall be constructed from aluminum and painted with
same f inish as unit exterior. The louver face is lined with 1/2" galvanized mesh bird screen.
Louvers shall be designed to collect and drain rainwater to outside of unit. Outside air
louvers shall be sized for a maximum face velocity of 500 fpm based on gross louver area.
Louvers shall have zero water penetration at 600 ft/min air velocit y. Maximum louver
pressure drop shall be 0.03” w.g. at 500 ft/min.
K. Air Flow Measuring Stations: Outside / Ret / Suppl. airf low measuring stations to be
provided by AAP.
L. Access Sections: Access sections shall be installed where indicated on the drawings and
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shall be as specif ied on the equipment schedule.
1. Access sections shall have double-walled hinged doors.
M. Electrical: Provide vapor tight marine lights as specified in the submittal documents, factory
wired to a single weatherproof switch located on exterior of cabinet. Provide
weatherproof, 15 amps, GFCI receptacle near the light switch wired to the lighting circuit.
Separate 120/1/60 power to the light switch shall be provided and installed by others.
1. All wiring shall meet N.E.C requirements.
2. All wiring shall be run in EMT conduit, raceways are not acceptable. If the unit
requires splits, junction boxes shall be furnished on each section to allow the
electrical contractor to make f inal connections in the f ield. W iring shall be clearly
labeled to facilitate field connection.
3. Variable frequency drive f or indoor units shall be housed in NEMA 1 Enclosure.
Variable f requency drives for outdoor units shall be housed in suitable NEMA
3R rated enclosures, or in recessed enclosures provided inside the air handling
unit, equipped with air-tight access doors and interior cooling provided by
circulating filtered, conditioned air under positive pressure.
4. Motor starter panels shall carry the U.L. 508 listing.
5. Unit mounted controls shall be installed and tested by AHU manuf acturer.
Controls shall be provided by the controls contractor and shipped to the factory
f or installation. All wiring must be in conduit.
N. Testing:
1. Factory Leak Test: Air Handling Unit manuf acturer shall provide a witnessed factory
leakage test at 1.5 times design static pressure up to a maximum of 12” w.g.
Leakage rate at test pressure shall not exceed 1% of design air volume. Unit shall
be tested with all openings sealed. A pressure blower with a variable frequency
drive shall be used to set the test pressure. CFM shall be determined using a
calibrated orifice. Unless specif ied otherwise, test pressures shall be positive on
positively pressurized sections and negative on negatively pressurized sections of
the air handler. A report of all test results shall be written and submitted to Owner’s
representative for approval.
2. Factory Cabinet Def lection Test: Air handling unit manufacturer shall provide a
witnessed factory Panel Def lection Test at the unit design static pressure (1.5 times
design static pressure optional). Panel def lection shall not exceed L/200 of longest
plane being measured the test pressure. The casing def lection shall be measured
at midpoint of panel and at panel seam. A report of all test results shall be written
and submitted to Owner’s representative for approval.
3. Factory Performance Test: Air handling unit manufacturer shall provide factory Airflow
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test witnessed by owner’s representative, mechanical engineer of record, and
mechanical contractor. Tests shall be in accordance to AMCA 320 for sound and
AMCA 210 for airflow performance. All Cost for travel and lodging shall be carried by
manufacturer’s representatives.
2.03 AUTOMATIC TEMPERAT URE CONTROLS
A. Damper actuators shall be provided by controls contractor. Actuators shall be of sufficient size
and quantity to ensure complete damper operation. Actuators shall be direct coupled to
minimize link age.
B. Differential pressure gauges shall be provided by AAP. Pressure gages shall be factory
installed across each filter bank f or individual filters. The gauge shall be diaphragm-actuated
dial type. Range shall be as f ollows: 0”-1.0” w.g. for medium-eff icient pleated media f ilters, 0”-
2.0” w.g. for high- eff icient cartridge and bag filters without pre-filters, 0”-3.0” w.g. for high-
efficient cartridge and bag filters with pre-f ilters.
C. Fan status sensing shall be provided.
D. All necessary sensors (temperature, pressure, etc.) to complete the required sequence of
operation, shall be provided by the air handler manufacturer.
E. All temperature sensors shall be averaging type. Sensors shall be factory engineered to
accurately measure mixed air temperatures. Capillary radius clips shall be uses at capillary
bends to ensure no crimping or wear of the tube.
F. Unit DDC Controller:
1. Unit controls are to be provided by controls contractor, installed and tested by unit
manufacturer.
2. Unit to have a conf igurable BACnet –IP or MS/TP connection, depending on BAS
needs.
3. One programmable DDC controller shall be provided f or each AHU as indicated on
the schedule and drawings. Control of multiple units from a single controller is not
acceptable. Each programmable DDC controller shall use BACnet protocol to
ensure open communication with other open BAS. Each unit controller shall be
f actory wired to all unit end devices. On board local user display, shall give user
access to unit status, set points and alarms.
4. The programmable DDC controller and the control components shall be selected,
mounted, wired and tested by the AHU Manufacturer at their factory bef ore
shipment. Testing shall be perform ed to ensure wiring continuity between the
controller and all devices, and to ensure proper operation of the end devices.
5. For a listing of minimum points, see points table listed on plans.
6. Manufacturer to provide final sequence of operation as part of submittal package for
approval by MEOR.
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PART 3 – EXECUTION
3.01 INSTALLATION
A. Install in accordance with manufacturer's instructions.
B. Install in conformance with ARI 435.
C. Install the units as shown on the f loor plans.
D. Coordinate external vibration isolation attachment to the unit.
E. Cooling coil pipe connection for cooling coils and heating hot water pipe connection to heating
coils shall be offset from the coil and shall not interf ere with coil pull space or access doors into
the air handling unit. Contractor shall coordinate exact location with air handling unit
manuf acturer.
F. Air handling units shall not be operated unless the following requirements (if applicable) are
met:
1. Ductwork is clean and f ilters are in place
2. Bearings are lubricated.
3. Bearing and drive setscrews to be torqued in accordance with the installation
instructions.
4. Belts aligned and fan has been tested run
5. Shipping braces removed
6. Condensates properly trapped.
7. Piping connections verif ied and leak tested.
G. Training to owners’ personnel provided by the AHU manufacturer.
H. Manufacturer’s rep shall assist with start-up and commissioning.
I. Mechanical Contractor shall complete all manufacturer recommended and required training prior
to installation.
End of section
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SECTION 23 30 00
HEATING, VENTILATION. AND AIR CONDITIONING
PART 1 - GENERAL
1.1 DESCRIPTION
A. Work under this section includes all labor, equipment, material, services, transportation, etc.
required for and reasonably incidental to the complete and satisfactory install ation of all of the
HVAC Systems as indicated on the Drawings or specified herein.
B. Contractor shall manage the project, coordinate all meetings, including weekly meeting, and
manage all subs.
1.2 WORK INCLUDED IN THIS SECTION
A. Test and Balance
B. Submittals and Shop Drawings
C. Record Drawings
D. Operation and Maintenance Manuals
E. Guarantee
F. RELATED WORK SPECIFIED ELSEWHERE
G. Electrical supply to units. See Electrical Drawings.
H. Cutting and Patching. See Division 1 and 7, and Mechanical Drawings.
I. Equipment Pads and Support. See Structural Drawings.
1.3 GENERAL REQUIREMENTS
A. This section of the specification shall be considered as a part of the entire specification and all
applicable portions of General Conditions, Special Conditions, and Division 1 shall apply.
B. Before commencement of work this contractor shall determine the exact location, size,
elevation, and availability of all utilities relevant to the mechanical work and immediately notify
the Owner with written notification of any discrepancies. In addition, this Contractor shall
contact all involved utility companies, make all necessary arrangements for service, and pay all
fees incurred due to connection of services.
C. Erection: The Contractor shall furnish the services of an experienced superintendent, who shall
be constantly in charge of the erection of the work, together with all necessary journeymen,
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helpers, and laborers required to properly unload, erect, connect, adjust, start of operate and
test the work involved.
1.4 REFERENCES
A. AABC - National Standards for Field Measurement and Instrumentation, Total System Balance.
B. AMCA 210 - Laboratory Methods of Testing Fans for Rating Purposes.
C. AMCA 300 - Test code for sound rating air-moving devices.
D. ANSI/NFPA 90A - Installation of Air Conditioning and Ventilation System.
E. ARI 270 - Sound rating of Outdoor Unitary Equipment.
F. ASHRAE 52-76 - Method of Testing Air Cleaning Devices Used in General Ventilation for
Removing Particulate Matter
G. ASTM A90 - Weight of Coating on Zinc - Coated (Galvanized) Iron or Steel Articles
H. ASTM A120 - Black and Galvanized Steel Pipe
I. ASTM B88 - Seamless Copper Water Tube
J. ASTM C518 - Steady State Heat Flux Measurements and Thermal Transmission Properties by
Means of the Heat Flow Meter Apparatus
K. ASTM C553 - Mineral Fiber Blanket and Felt Insulation
L. ASTM C612 - Mineral Fiber Block and Board Thermal Insulation
M. ASTM E84 - Surface Burning Characteristics of Building Materials
N. ASTM E96 - Water vapor Transmission of Materials
O. NFPA 90B - Installation of Warm Air Heating and Air Conditioning Systems
P. NFPA 255 - Surface Burning Characteristics of Building Materials
Q. UL 723 - Surface Burning Characteristics of Building Materials
R. California Mechanical Code - 2016 Edition
S. California Building Code - 2016 Edition
T. CEC Title-24 – 2016 Edition
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1.5 SUBMITTALS AND SHOP DRAWINGS
A. Contractor agrees that shop drawings submittals processed by the Owner do not become
Contract Documents and are not Change Orders; that the purpose of the shop drawing review
is to establish a reporting procedure and is intended for the Contractor's convenience i n
organizing his work and to permit the Owner to monitor the Contractor's progress and
understanding of the design. The process of review of the Contractor's submittals is not of
testing the Owner’s perception. If deviations, discrepancies or conflicts between shop drawings
submittals and the Contract Documents are discovered either prior to or after the shop drawing
submittals are processed by the Owner, the Contractor agrees that the Contract Documents
shall control and shall be followed.
B. Prepare and furnish fully coordinated shop drawings showing piping on \ drawings.
1. The drawings shall be minimum 1/4" = 1'-0" scale and shall show dimensioning of piping
from gridlines, bottom of elevation marks for piping and fittings, valves, dampers, devices,
etc. with labels.
2. In addition, coordinate with related work and reference on the same drawings major
plumbing piping, structural steel, fire protection piping, conduit runs and cable trays.
3. Review and sign these drawings to verify coordination of related equipm ent.
4. Conflicts, which occur shall be brought to the attention of the Owner Representative prior
to issuance of the drawings.
C. Materials and Equipment:
1. As soon as possible and within 14 days after award of the contract, and before their
purchase, the Contractor shall submit to the Owner seven bound booklets for approval
containing a complete list of materials, specialties and equipment he is to furnish for the
installation.
2. Literature shall be standard manufacturer's catalog cuts and items to be installed shall be
clearly indicated.
3. All submittals shall be made at one time.
D. Each item shall be identified by manufacturer, brand and trade name, number, size, rating and
whatever other data is necessary to properly identify and check the materials and equipment.
The words: "as specified" will not be considered sufficient identification.
E. Accessories, controls, finish, etc., not submitted or identified with the submitted equipment shall
be furnished and installed as specified.
F. 7 Sets of complete shop drawings shall be submitted for approval indicating all piping and
equipment. These drawings shall indicate sizes, locations and elevations of equipment and
equipment pads, piping and controls including transitions, valves etc.
G. Shop drawings shall be approved only t o extent of information indicated. Approval of an item of
equipment shall not be construed to mean approval for components for that item for which
Contractor has provided no information.
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H. Approval of shop drawings shall not relieve Contractor of responsibi lity for providing all controls,
wiring, components, etc. which are shown or specified, or all additional controls, wiring,
components, etc. required to provide complete and correctly operating mechanical systems.
I. Submit product data for the following manufactured products, assemblies, personnel and testing
agencies required for this project.
1. VRF Multizone Air Handling Units.
2. VRF Condensing Units.
3. Buffer Tank
4. Controls
5. Ductwork
6. Piping
7. Insulation Materials
8. Filters
9. TAB
1.6 SUBSTITUTIONS
A. Should the Contractor desire to substitute any material, equipment or other items for those
specified, he shall submit a complete list, including detailed equipment layouts and performance
characteristics within 35 calendar days after the scheduled Start of Construction. Said data
shall be submitted in 7 copies, assembled in individua l brochures.
B. The entire cost of all changes of any type due to substitution for materials specified shall be
born by the Contractor at no extra cost to the Owner.
C. Unsolicited and voluntary deducts, on the part of the Contractor for substituting unapproved
systems and/or equipment, shall not be considered for the purpose of awarding the Contract.
D. The contractor shall submit the amount of cost credit to the Contract in the event the proposed
substitution is accepted.
E. In all cases where substitutions are proposed after bids are received, the Contractor shall bear
the cost of evaluation on the basis of 2-1/2 times technical salaries of engineering personnel
involved.
1.7 AVAILABILITY OF SPECIFIED EQUIPMENT
A. Verify prior to bidding that all specified equipment is available and can be obtained in time for
installation during orderly and timely progress of the work.
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B. In the event that specified items will not be so available, notify the Owner prior to receipt of bids.
C. Costs of delays because of non-availability of specified items, when such delays could have
been avoided by proper investigation on the part of the Contractor, will be back -charged as
necessary and shall not be born by the Owner.
1.8 RECORD DRAWINGS
A. The contractor shall arrange and pay for one set of white prints of the HVAC drawings, which he
shall alter in red to show all changes made to the original layout. These drawings shall be kept
current.
B. The contractor shall deliver these completed to the Owner when the job is finished and
accepted prior to final payment, and provide copies of approved shop drawings in ACAD format
to MEOR.
1.9 OPERATION AND MAINTENANCE DATA
A. Submit two sets prior to final inspection, bound in 8 -1/2 x 11 inch text pages, binders with
durable plastic covers. Prepare binder covers with printed title "OPERATION AND
MAINTENANCE INSTRUCTIONS", and title of project. Internally subdivide the binder contents
with permanent page dividers, logically organized as described below; with tab titling clear ly
printed under reinforced laminated plastic tabs.
B. Contents: Prepare a Table of Contents with each Product or system description identified.
1. Part 1:
a. Directory listing names, addresses, and telephone numbers of Owner, Contractor,
Subcontractors, and major equipment suppliers.
2. Part 2:
a. Operation and maintenance instructions, arranged by system.
b. Identify the following:
1) Significant design criteria
2) List of equipment
3) Parts list for each component
4) Operating instructions
5) Maintenance instructions for equipment and systems
6) Maintenance instructions for special finishes, including recommended
cleaning methods and materials and special precautions identifying
detrimental agents.
C. Submit one copy of completed volumes in final form 15 days prior to final inspection. This copy
will be returned after final inspection, with Owner comments. Revise content of documents as
required prior to final submittal.
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D. Submit final volumes (revised) within ten days after final inspection.
1.10 GUARANTEES
A. The Contractor, in accepting this contract, binds himself to replace or repair at his o wn expense
any defect in workmanship or material which may appear within a period of one year from the
date of the final acceptance of the building, and to pay for all resulting damage which shall
appear within the said period; provided always that the Contractor shall not be liable for
anything attributable to acts of the agents of the Owner, or for ordinary wear. Also, given date
of work performed by the Contractor be accepted as complete, he shall agree to correct any
deficiencies or omissions in respect to the plans or specifications which may appear in the
afore-mentioned twenty-four month period.
B. The Contractor guarantees that all piping as provided in this specification will be free from all
obstructions, and that all piping will be tight and drip free.
C. All refrigerant compressors shall carry a five-year manufacturer's warranty.
1.11 LOCAL CONDITIONS
A. The Contractor and trade submitting tenders on this work shall visit and will be deemed to have
visited the site to ensure that they are familiar with all conditions relating to the work. Failure to
visit the site will in no way relieve the successful Contractor of the necessity of furnishing any
material or performing any work that may be required to complete the work in accordance with
the drawings and specifications without additional cost to the Owner.
1.12 RULES, REGULATIONS AND CODES
A. All work and materials shall be in full accordance with the latest Uniform Mechanical Code,
Uniform Plumbing Code, Uniform Building Code and local rules and regulations, State Fire
Marshal regulations, the safety orders of the Division of Industrial Safety; the National Electric
Code; the standards of the National Fire Protection Association; American Gas Association;
Occupation and Safety Act; American National Standards Institute; American Society of
Mechanical Engineers; American Society for Testing and Materials; Installation Standards
published by the International Association of Plumbing And Mechanical officials (IAPMO) and
other applicable laws, codes, or regulations. Nothing in these specifications shall be construed
to permit work not conforming to these codes.
B. Electrical Work: Motors, electrical apparatus and wiring specified in this section shall conform
to the National Electrical Manufacturer's Standards and the National Electric Code and bear the
Underwriter's label of approval.
C. The Contractor shall furnish, without extra charge, any additional material and labor when and
where required to comply with these rules and r egulations, though the work be not mentioned in
these Specifications or shown on the Drawings. When these Specifications or Drawings call for
or describe materials or construction of a better quality or larger sizes than required by the
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above-mentioned rules and regulations, the provisions of these specifications and
accompanying drawings shall take precedence.
1.13 FEES AND PERMITS
A. The Contractor must obtain and pay all fees for permits, licenses, inspections, etc., which are
required by any legally constituted authority. Coordinate exact requirements with the Owner
prior to bid.
1.14 COORDINATION
A. Following the general arrangement indicated on the Drawings as closely as possible, the
Contractor shall coordinate with the engineer, structural, plumbing, electrical and all other trades
prior to installation of the materials and equipment to verify adequate space available for
installation of the work shown. The Owner shall be immediately notified if an area of conflict
occurs between trades.
B. The Contractor shall bear all costs incurred for work that must be relocated d ue to conflicts
between trades.
C. The Mechanical Contractor shall coordinate all requirements for all points of connection with the
General Contractor and other trades prior to bid.
1.15 DRAWINGS
A. The work shall be installed as indicated on Drawings, however, changes to accommodate
installation of this work with other work, or in order to meet engineering or structural conditions,
shall be made without additional cost to the Owner.
B. For the purpose of clarity and legibility, the Drawings are essentially diagrammatic to the extent
that many offsets, bonds, unions, special fittings and exact locations are not indicated. The
Contractor shall make use of all data in all of the Contract Documents, and shall verify this
information at the site.
1.16 INSPECTION
A. The Contractor shall not allow or cause any of his work to be covered up or closed in until it has
been inspected, tested, approved by all authorities have jurisdiction, and until Project Record
drawings have been properly annotated.
B. Should any of his work be covered up or closed in before such inspection, he shall, at his own
expense, uncover the work to the satisfaction of the inspection party. All related repair work
cost shall be borne by the Contractor.
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1.17 DELIVERY, STORAGE AND PROTECTION OF PROPERTY
A. Place orders for all equipment in time to prevent any delay in construction schedule or
completion of project. If any materials or equipment are not ordered in time, additional charges
made by equipment manufacturers to complete their equipment in time to meet construction
schedule, together with any special handling charges, shall be borne by the contractor.
B. Materials shall be delivered in ample quantities from time to time as may be necessary for the
uninterrupted progress of the work. They shall be stored as to cause the least obstruction to the
premises and distributed so as to prevent overloading to any portion of the structure.
C. The Contractor shall provide temporary storage and shop areas that are required at the site for
the safe and proper storage of materials, tools, and other items used in the performance of this
work. These areas shall be constructed only in approved locations and shall not interfere with
the work of any other Contractor.
D. All work, equipment and materials shall be protected at all times. The Contractor shall make
good all damage caused either directly or indirectly by his own workmen. The Contractor shall
also protect his own work from damage. He shall close all pipe and openings with caps or p lugs
during installation. He shall protect all of his equipment and materials against dirt, water,
chemical, and mechanical injury. Upon completion, all work shall be thoroughly cleaned and
delivered in a new condition.
1.18 DAMAGE BY LEAKS, ETC.
A. The Contractor shall be responsible for all damage to any part of the premises or work of other
Contractors, caused by leaks or breaks in the piping or equipment furnished and/or installed
under this section, during the construction and guarantee period.
1.19 ACCESS TO EQUIPMENT FOR MAINTENANCE
A. Install all equipment, piping, etc. to permit access for normal maintenance. Maintain easy
access to filters, motors, etc. Install all such equipment and accessories to facilitate
maintenance. Perform any relocation of pipes, etc. required to permit access at request of
Owner at no additional cost to Owner.
B. Furnish and install access doors or panels in walls, floors, and ceilings to permit access to
equipment, dampers, and all other items requiring service. Coordinate location of access doors
with other trades as required.
C. Size access panels to allow inspection and removal of all items served.
D. Use Milcor style as required for material in which door is installed. Where door is installed in fire
rated construction, provide door bearing UL label required for condition.
1.20 QUALITY ASSURANCE
A. Abbreviations:
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1. AABC - Associate Air Balance Council
2. AMCA - Air Moving and Conditioning Association
3. ANSI - American National Standards Institute
4. ARI - Air Conditioning and Refrigeration Institute
5. ASA - American Standards Association
6. ASC - Adhesive and Sealant Council
7. ASHRAE - American Society of Heating, Refrigerating and Air Conditioning Engineers
8. ASME - American Society of Mechanical Engineers
9. ASTN - American Society for Nondestructive Testing
10. ASSE - Am erican Society of Sanitary Engineering
11. ASTM - American Society for Testing and Materials
12. AWS - American Welding Society
13. AWWA - American Water Works Association
14. CAC - California Administration Code
15. 2016 CBC - California Building Code
16. 2016 CEC - National Electrical Code
17. 2016 CMC - California Mechanical Code
18. California Fire Code with California Amendments.
19. MSS - Manufacturers' Standardization Society
20. NBS - National Bureau of Standards
21. NCWB - National Certified Piping Welding Bureau
22. NEMA - National Electrical Manufacturer's Association
23. NFPA - National Fire Protection Association
24. PDI - Plumbing and Drainage Institute
25. SMACNA – Latest Sheet Metal and Air Conditioning Contractor's National Association,
Inc.
26. UL - Underwriters Laboratories, Inc.
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B. Rulings and interpretations of authorities shall be considered a part of the regulations.
C. Nothing in this document is to be construed to permit Work not conforming to these codes and
regulations.
D. Should there be any direct conflict between the above rules, the most stringent sh all govern.
E. The Contractor shall recognize that the design is based upon the equipment and material
specified by name or construction and accept full responsibility for assuring that the quality,
utility and performance of a substitution equals or exceeds that of the specified item.
F. Testing: Provide the services of a qualified testing laboratory/agency to perform the specified
field tests. Notify the Owner Representative 48 hours in advance of performance of Work
requiring testing. Provide all materials required for testing.
G. Factory and Field Testing:
1. See each Section for the required testing and their procedures.
2. Test reports shall include description of equipment tested, description of test procedures,
test results, and names and signatures of witnesses of tests.
PART 2 - PRODUCTS
2.1 GENERAL
A. All materials and equipment shall be new and of the best of their respective grades, free from all
defects and of the make, brand or quality herein specified or as accepted by the Owner.
B. All materials and equipment shall be identif ied by manufacturer's name or nameplate data.
Unidentified material or equipment shall be removed from the site.
C. Equipment specified by manufacturer's number shall include all accessories, controls, etc.,
listed in the catalog as standard with the equipment. Optional or additional accessories shall be
furnished as specified.
D. Where no specific make of material or equipment is mentioned, any first-class product of a
reputable manufacturer may be used, provided it conforms to the requirements of the system
and meets with the approval of the Owner.
E. Equipment and materials damaged during transportation, installation and operation shall be
considered as "totally damaged" and shall be replaced with new. Any variance from this clause
shall be made only with written approval of the Owner.
725 N. Alameda Ave 23 30 00
Azusa, CA 91702 HEATING, VENTILATION, AND AIR CONDITIONING
March 28, 2019
HVAC 233000 - [11]
2.2 CONTROLS
A. The Mechanical Contractor shall be responsible for the proper coordination of all control work
and electrical work in connection therewith. He shall also be responsible for the proper
operation of the entire system.
B. Refer to drawings for control diagrams and additional requirements.
PART 3 - EXECUTION
3.1 INSTALLATION
A. Equipment Installation:
1. All equipment provided shall be installed in strict accordance with the manufacturer's
recommendations.
2. Should the drawings or specifications indicate the equipment is to be installed in a
manner not in accordance with the manufacturer's recommendations; the Contractor shall
obtain direction from the Engineer prior to proceeding with the installation. If the
Contractor proceeds with the installation without obtaining direction from the Engineer,
the Contractor shall be required to make all required corrections to the installation at no
additional cost to the contract.
3. Space Consideration:
a. Certain equipment will have to be installed within the lim ited space available as
indicated on the drawings.
b. Exact field measurements of existing conditions will be the responsibility of this
Contractor to assure that the equipment to be installed under this Section of the
specifications can be installed as indicated.
c. Contractor shall submit shop drawings for approval prior to installation.
3.2 SOUND AND VIBRATION ISOLATION
A. All vibrating equipment shall be sound isolated from the structure.
B. The Contractor shall submit all necessary data for each vibration isolat or, including static
deflection and weight loading, for equipment in operation.
C. All vibrating equipment shall be provided with flexible pipe connections. Submit for approval
prior to installation.
725 N. Alameda Ave 23 30 00
Azusa, CA 91702 HEATING, VENTILATION, AND AIR CONDITIONING
March 28, 2019
HVAC 233000 - [12]
3.3 JOB COMPLETION
A. Equipment Identification:
1. All equipment furnished under this section shall be provided with the manufacturer's
metal identification labels securely attached and showing all pertinent data, including
performance characteristics, size, model, and serial number. Labels shall not be
obscured in any manner.
2. Identification name plates shall be provided on all equipment and control components,
including room thermostat numbers coded to their respective automatic zone damper,
valve, or air conditioning unit. Name plates shall be constructed of black bakel ite with
white center engraved letters three-sixteenth inch (3/16") high and shall be cemented to
equipment with an epoxy resin. The Contractor shall submit to the Engineer, a complete
list of name plate titles for approval prior to installation.
3. Each valve shall be identified by a number brass tag with hole and brass chain mounted
on valve stem or handle. Tag shall be a minimum of one and one -half inch (1-1/2") in
diameter and numbers shall be at least one-fourth inch (1/4") high stamped into the tag.
B. Final Operation: Upon completion of the installation of the equipment and after all systems
have been tested, cleaned, the Contractor shall place a competent person in charge who shall
operate the equipment for a period of three eight-hour days. During this period of operation, all
safety and operating controls shall be actuated to demonstrate proper operation. During this
operating period, the Owner's representative shall be instructed in all details of operation and
maintenance. All required instructions from the equipment manufacturer's representative shall
be given during the period.
C. Operation Instructions:
1. Prepare a diagram of the entire control system with a full description of the heating,
ventilating and air conditioning systems.
2. After approval by the Engineer, the control diagram and complete operating instructions
shall be mounted under glass and installed where directed.
3. Prepare two (2) maintenance manuals which shall include all the necessary or pertinent
data, such as:
a. Names, addresses and emergency phone numbers of all suppliers and
manufacturers.
b. Part numbers of all replaceable items.
c. Oiling and lubrication instructions.
d. Air balance report.
e. Control diagram and operation sequence, together with labeling of controls and
instruments to match the diagram.
725 N. Alameda Ave 23 30 00
Azusa, CA 91702 HEATING, VENTILATION, AND AIR CONDITIONING
March 28, 2019
HVAC 233000 - [13]
f. A maintenance schedule which shall list all required maintenance on all equipment
furnished under this section of the specifications and the intervals of which the
items are to be performed.
4. An identification chart indicating valve operating in th e piping system shall be installed as
located by the Owner. Identification charts shall be mounted behind glass in a frame.
D. Clean-Up:
1. After all heating, ventilating and air conditioning work has been tested and approved, the
Contractor shall thoroughly clean all parts of the equipment installation. Exposed parts
which are to be painted are to be thoroughly cleaned of cement plaster and other
materials and all greases and oil spots removed with solvent. Exposed rough metal work
to be carefully brushed down with steel brushes to remove rust and other spots and left in
proper condition to receive painter's finish.
2. Remove all debris from the job site, all cartons, boxes, packing crates, excess materials
not used occasioned by the work and to the satisfaction of the Owner.
3. If the above requirements of clean-up are not to the satisfaction of the Owner, the Owner
reserves the right to order the work done and the cost of which shall be borne by the
Contractor.
4. The Contractor shall remove on a daily basis all debri s from the job site, to the
satisfaction of the Owner.
5. If the above requirements of clean-up are not to the satisfaction of the Owner, the Owner
reserves the right to order the work done by a third party and the cost of which shall be
borne by the Contractor.
END OF SECTION
725 Alameda Ave. 23 30 01
Azusa, CA 91702 VRF Condensing Unit
April 18, 2019
VRF CONDENSING UNIT 23 30 01 – [1]
SECTION 23 30 01
HVAC Guide Specifications
Multi Indoor Unit, Variable Refrigerant Flow; R2-Series;
Size Range: 14- & 24-TONS NOMINAL R2
Mitsubishi Electric Model Number:
PURY-P168T(Y)LMU -A (-BS) R2-SERIES (SIMULTANEOUS COOL/HE AT MODEL)
PURY-P288T(Y)SLMU -A (-BS) R2-SERIES (SIMULTANEOUS COOL/HEAT MODEL)
SEE MECHANICAL DRAWING FOR ADDITIONAL DATA
Part 1 – General
1.01 SYSTEM Description
The variable capacity, heat pump heat recovery air conditioning system shall be a Mitsubishi Electric
CITY MULTI VRF (Variable Refrigerant Flow) zoning system.
2.01 QUALITY ASSURANCE
A. The units shall be listed by Electrical Testing Laboratories (ETL) and bear the ETL label.
B. All wiring shall be in accordance with the National Electrical Code (N.E.C.).
C. The units shall be manufactured in a facility registered to ISO 9001 and ISO14001 which is a set of
standards applying to environmental protection set by the International Standard Organization
(ISO).
D. All units must meet or exceed the 2010 Federal minimum efficiency requirements and the ASHRAE
90.1 efficiency requirements for VRF systems. Efficiency shall be published in accordance with the
Air-Conditioning, Heating, and Refrigeration Institute (AHRI) Standard 1230.
E. A full charge of R-410A for the condensing unit only shall be provided in the condensing unit.
3.01 DELIVERY, STORAGE AND HANDLING
A. Unit shall be stored and handled according to the manufacturer’s recommendation.
4.01 CONTROLS
A. The control system shall consist of a low voltage communication network of unitary built-in
controllers with on-board communications and a web-based operator interface. A web controller
with a network interface card shall gather data from this system and generate web pages accessible
through a conventional web browser on each PC connected to the network. Operators shall be able
to perform all normal operator functions through the web browser interface.
B. System controls and control components shall be installed in accordance with the manufacturer’s
written installation instructions.
725 Alameda Ave. 23 30 01
Azusa, CA 91702 VRF Condensing Unit
April 18, 2019
VRF CONDENSING UNIT 23 30 01 – [2]
C. Furnish energy conservation features such as optimal start, night setback, request-based logic, and
demand level adjustment of overall system capacity as specified in the sequence.
D. System shall provide direct and reverse-acting on and off algorithms based on an input condition or
group conditions to cycle a binary output or multiple binary outputs.
E. Provide capability for future system expansion to include monitoring and use of occupant card
access, lighting control and general equipment control.
F. System shall be capable of email generation for remote alarm annunciation.
G. Control system start-up shall be a required service to be completed by the manufacturer or a duly
authorized, competent representative that has been factory trained in Mitsubishi Electric controls
system configuration and operation. The representative shall provide proof of certification for
Mitsubishi Electric Controls Applications Training indicating successful completion of no more than
two (2) years prior to system installation. This certification shall be included as part of the
equipment and/or controls submittals. This service shall be equipment and system count
dependent and shall be a minimum of one (1) eight (8) hour period to be completed during normal
working hours.
Part 2 – Warranty
5.01 The CITY MULTI units shall be covered by the manufacturer’s limited warranty for a period of one (1)
year parts and seven (7) year compressor to the original owner from date of installation.
Note: See schedule sheets for exact unit model number.
If the systems are:
1) designed by a certified CITY MULTI Diamond Designer using Diamond System Builder,
2) installed by a contractor that has successfully completed the Mitsubishi Electric three day
service course, AND
3) verified with required materials submitted to and approved by the Mitsubishi Electric Service
Department, which include:
- As built Diamond System Builder file,
- A one (1) hour Maintenance Tool record with system information, in Ordinary Control
Mode (not initial),
- Outdoor and Indoor unit dip switch settings
- Outdoor unit(s) function settings,
then the units shall be covered by an extended manufacturer’s limited warranty for a period of ten (10)
years to the original owner from date of installation.
In addition, the compressor shall have a manufacturer’s limited warranty for a period of ten (10) years to
the original owner from date of installation.
If, during this period, any part should fail to function properly due to defects in workmanship or material,
it shall be replaced or repaired at the discretion of the manufacturer.
725 Alameda Ave. 23 30 01
Azusa, CA 91702 VRF Condensing Unit
April 18, 2019
VRF CONDENSING UNIT 23 30 01 – [3]
This warranty shall not include labor.
6.01 Manufacturer shall have a minimum of thirty-three (33) years of HVAC experience in the U.S. market.
7.01 All manufacturer technical and service manuals must be readily available for download by any local
contractor should emergency service be required. Registering and sign-in requirements which may
delay emergency service reference are not allowed.
8.01 The CITY MULTI VRF system shall be installed by a contractor with extensive CITY MULTI install and
service training. The mandatory contractor service and install training should be performed by the
manufacturer.
Part 3 – Products
1.01 L-GENERATION R2-SERIES OUTDOOR UNIT
A. General:
The R2-Series PURY outdoor unit shall be used specifically with CITY MULTI VRF components.
The PURY outdoor units shall be equipped with multiple circuit boards that interface to the M -NET
controls system and shall perform all functions necessary for operation. Each outdoor unit module
shall be completely factory assembled, piped and wired and run tested at the factory.
1. The model nomenclature and unit requirements are shown below. All units requiring a factory
supplied twinning kits shall be piped together in the field, without the need for equalizing line(s).
If an alternate manufacturer is selected, any additional material, cost, and labor to install
additional lines shall be incurred by the contractor.
Outdoor Unit Model Nomenclature
208/230 Volt
Twinning Kit Model Number Units
PURY-P72TLMU (1) PURY-P72TLMU None
PURY-P96TLMU (1) PURY-P96TLMU None
PURY-P120TLMU (1) PURY-P120TLMU None
PURY-P144TLMU (1) PURY-P144TLMU None
PURY-P144TSLMU (1) PURY-P72TLMU
(1) PURY-P72TLMU CMY-ER100CBK
PURY-P168TLMU (1) PURY-P168TLMU None
725 Alameda Ave. 23 30 01
Azusa, CA 91702 VRF Condensing Unit
April 18, 2019
VRF CONDENSING UNIT 23 30 01 – [4]
Outdoor Unit Model Nomenclature
PURY-P168TSLMU (1) PURY-P72TLMU
(1) PURY-P96TLMU CMY-ER200CBK
PURY-P192TSLMU (2) PURY-P96TLMU CMY-ER200CBK
PURY-P216TSLMU (1) PURY-P96TLMU
(1) PURY-P120TLMU CMY-ER200CBK
PURY-P240TSLMU (2) PURY-P120TLMU CMY-ER200CBK
PURY-P264TSLMU (1) PURY-P120TLMU
(1) PURY-P144TLMU CMY-ER200CBK
PURY-P288TSLMU (2) PURY-P144TLMU CMY-ER200CBK
PURY-P312TSLMU (1) PURY-P144TLMU
(1) PURY-P168TLMU CMY-ER200CBK
PURY-P336TSLMU (2) PURY-P168TLMU CMY-ER200CBK
2. Outdoor unit shall have a sound rating no higher than 61 dB(A) individually or 64 dB(A) twinned.
Units shall have a sound rating no higher than 51 dB(A) individually or 54 dB(A) twinned while in
night mode operation. If an alternate manufacturer is selected, any additional material, cost, and
labor to meet published sound levels shall be incurred by the contractor.
3. Both refrigerant lines from the outdoor unit to the BC (Branch Circuit) Controller (Single or Main)
shall be insulated in accordance with the installation manual.
4. The outdoor unit shall have the capability of installing the main refrigerant piping through the
bottom of the unit.
5. There shall be no more than 3 branch circuit controllers connected to any one outdoor u nit.
6. Outdoor unit shall be able to connect to up to 50 indoor units depending upon model.
7. The outdoor unit shall have an accumulator with refrigerant level sensors and controls.
8. The outdoor unit shall have a high-pressure safety switch, over-current protection, crankcase
heater and DC bus protection.
9. The outdoor unit shall have the ability to operate with a maximum height difference of 164 feet
and have total refrigerant tubing length of 1804-3100 feet. The greatest length is not to exceed
541 feet between outdoor unit and the indoor units without the need for line size changes or
traps.
10. The outdoor unit shall be capable of operating in heating mode down to -4F ambient
temperatures or cooling mode down to 23F ambient temperatures, without additional low
ambient controls. If an alternate manufacturer is selected, any additional material, cost, and
labor to meet low ambient operating condition and performance shall be incurred by the
contractor.
725 Alameda Ave. 23 30 01
Azusa, CA 91702 VRF Condensing Unit
April 18, 2019
VRF CONDENSING UNIT 23 30 01 – [5]
11. The outdoor unit shall have a high efficiency oil separator plus additional logic controls to
ensure adequate oil volume in the compressor is maintained. Unit must defrost all circuits
simultaneously in order to resume full heating more quickly. Partial defrost which may extend
“no or reduced heating” periods shall not be allowed.
B. Unit Cabinet:
12. The casing(s) shall be fabricated of galvanized steel, bonderized and finished. Units cabinets
shall be able to withstand 960 hours per ASTM B117 criteria for seacoast protected models (–
BS models)
C. Fan:
1. Each outdoor unit module shall be furnished with one direct drive, variable speed propeller type
fan. The fan shall be factory set for operation under 0 in. WG external static pressure, but
capable of normal operation under a maximum of 0.24 in. WG external static pressure via
dipswitch.
2. All fan motors shall have inherent protection, have permanently lubricated bearings, and be
completely variable speed.
3. All fan motors shall be mounted for quiet operation.
4. All fans shall be provided with a raised guard to prevent contact with moving parts.
5. The outdoor unit shall have vertical discharge airflow.
D. Refrigerant
1. R410A refrigerant shall be required for PURY-P-T/Y(S)KLU outdoor unit systems.
2. Polyolester (POE) oil shall be required. Prior to bidding, manufacturers using alt ernate oil types
shall submit material safety data sheets (MSDS) and comparison of hygroscopic properties for
alternate oil with list of local suppliers stocking alternate oil for approval at least two weeks prior
to bidding.
E. Coil:
1. The outdoor Hexicoil™ heat exchanger shall be of zinc coated aluminum construction with
turbulating flat tube construction.
2. The coil fins shall have a factory applied corrosion resistant blue-fin finish.
3. A stainless-steel pipe connects the aluminum coil to copper piping.
4. The coil shall be protected with an integral metal guard.
5. Refrigerant flow from the outdoor unit shall be controlled by means of an inverter driven
compressor.
6. The outdoor coil shall include 4 circuits with two position valves for each circuit, except for the
last stage.
725 Alameda Ave. 23 30 01
Azusa, CA 91702 VRF Condensing Unit
April 18, 2019
VRF CONDENSING UNIT 23 30 01 – [6]
F. Compressor:
1. Each outdoor unit module shall be equipped with one inverter driven scroll hermetic
compressor. Non inverter-driven compressors, which cause inrush current (demand charges)
and require larger wire sizing, shall not be allowed.
2. A crankcase heater(s) shall be factory mounted on the compressor(s).
3. The outdoor unit compressor shall have an inverter to modulate capacity. The capacity shall be
completely variable with a turndown of 15%-5% of rated capacity, depending upon unit size.
4. The compressor will be equipped with an internal thermal overload.
5. The compressor shall be mounted to avoid the transmission of vibration.
6. Field-installed oil equalization lines between modules are not allowed. Prior to bidding,
manufacturers requiring equalization must submit oil line sizing calculations specific to each
system and module placement for this project.
G. Controls:
1. The outdoor unit shall have the capability of up to 8 levels of demand control for each refrigerant
system
H. Electrical:
1. The outdoor unit electrical power shall be 208/230 volts, 3-phase, 60 hertz.
2. The outdoor unit shall be capable of satisfactory operation within voltage limits of 187-228 volts
(208V/60Hz), 207-253V (230V/60Hz).
3. The outdoor unit shall be controlled by integral microprocessors.
4. The control circuit between the indoor units, BC Controller and the outdoor unit shall be 24VDC
completed using a 2-conductor, twisted pair shielded cable to provide total integration of the
system.
2.01 BRANCH CIRCUIT (BC) CONTROLLERS FOR R2-SERIES SYSTEMS
A. General
The BC (Branch Circuit) Controllers shall include multiple branches to allow simultaneous heating
and cooling by allowing either hot gas refrigerant to flow to indoor unit(s) for heating or subcooled
liquid refrigerant to flow to indoor unit(s) for cooling. Refrigerant used for cooling must always be
subcooled for optimal indoor unit LEV performance; alternate branch devices with no subcooling
risk bubbles in liquid supplied to LEV and are not allowed.
The BC (Branch Circuit) Controllers shall be specifically used with R410A R2-Series systems.
These units shall be equipped with a circuit board that interfaces to the M-NET controls system and
shall perform all functions necessary for operation. The unit shall have a galvanized steel finish.
The BC Controller shall be completely factory assembled, piped and wired. Each unit shall be run
tested at the factory. This unit shall be mounted indoors, with access and service clearance
provided for each controller. The sum of connected capacity of all indoor air handlers shall range
725 Alameda Ave. 23 30 01
Azusa, CA 91702 VRF Condensing Unit
April 18, 2019
VRF CONDENSING UNIT 23 30 01 – [7]
from 50% to 150% of rated capacity. The BC Controller shall be suitable for use in plenums in
accordance with UL1995 ed 4.
B. BC Unit Cabinet:
1. The casing shall be fabricated of galvanized steel.
2. Each cabinet shall house a liquid-gas separator and multiple refrigeration control valves.
3. The unit shall house two tube-in-tube heat exchangers.
C. Refrigerant
1. R410A refrigerant shall be required.
D. Refrigerant Branches
1. All BC Controller refrigerant pipe connections shall be brazed or flared.
E. Refrigerant valves:
1. The unit shall be furnished with multiple branch circuits which can individually accommodate
up to 54,000 BTUH and up to three indoor units. Branches may be twinned to allow more than
54,000 BTUH.
2. Each branch shall have multiple two-position valves to control refrigerant flow.
3. Service shut-off valves shall be field-provided/installed for each branch to allow service to any
indoor unit without field interruption to overall system operation.
4. Linear electronic expansion valves shall be used to control the variable refrigerant flow.
F. Integral Drain Pan:
1. An Integral resin drain pan and drain shall be provided
G. Electrical:
1. The unit electrical power shall be 208/230 volts, 1 phase, 60 Hertz.
2. The unit shall be capable of satisfactory operation within voltage limits of 187-228 (208V/60Hz)
or 207-253 (230/60Hz).
3. The BC Controller shall be controlled by integral microprocessors
4. The control circuit between the indoor units and outdoor units shall be 24VDC completed using
a 2-conductor, twisted pair shielded cable to provide total integration of the system.
End of section
725 N. Alameda Ave 23 31 00
Azusa, CA DUCT AND CASINGS
March 28, 2019
HVAC DUCT AND CASINGS 233100 - [1]
SECTION 23 31 00
HVAC DUCTS AND CASINGS
PART 1 - GENERAL
1.01 DESCRIPTION OF WORK
A. Provide ductwork as indicated on the Drawings and as specified.
B. Seal duct, fittings and accessories where manufacturers and codes permit, per Part 3. Note that duct
construction pressure class may differ from leakage pressure class depending on building function.
C. Clean and pressure-test ductwork.
2.01 QUALITY ASSURANCE
A. Reference Standards:
1. National Fire Protection Association (NFPA): NFPA No. 90-A. "Air Conditioning and Ventilating
Systems".
2. Sheet Metal and Air Conditioning Contractors’ National Association, Inc. (SMACNA), 8224 Old
Court House Road, Vienna, Virginia, 22180.
a. Balancing and Adjustment Manual: In this Specification shall mean the first edition of the
“Manual for the Balancing and Adjustment of Air Distribution System”.
b. "HVAC Duct Construction Standards-Metal and Flexible", 2005.
c. "Round Industrial Duct Construction Standards", 1999.
d. "Rectangular Industrial Duct Construction Standards", 2004.
e. “HVAC Air Duct leakage Test Manual”, 1985.
3. American Conference of Governmental Industrial Hygienists (ACGIH). "Industrial Ventilation-A
Manual of Recommended Practice", 20th edition.
4. Factory Mutual (FM) Standard 7-78.
5. NFPA 91.
6. National Bureau of Standards (NBS) Voluntary Product Standard 15-69.
3.01 SUBMITTALS
A. Shop Drawings and Product Data:
1. Submit large-scale Drawings as follows:
a. Large-scale layout Drawings of all areas in which it may be necessary to deviate
substantially from layout shown on the Drawings. Minor transitions in ductwork, required to
avoid local interference with other trades, need not be submitted, as long as the duct are a is
725 N. Alameda Ave 23 31 00
Azusa, CA DUCT AND CASINGS
March 28, 2019
HVAC DUCT AND CASINGS 233100 - [2]
maintained. Show major relocation of ductwork and major changes prior to ductwork
fabrication.
2. Shop drawings shall include all ductwork including elevations, and shall show all terminal unit and
air device connections. Drawings shall be at a minimum scale of ¼ inch per 1 foot – 0 inches and
shall be based on coordination programs of all trades. Clearly identify all Work deviating from that
indicated on Contract Drawings.
3. Submit written report from the testing, adjusting and balancing agency. based on review of
Drawings and Specifications, with suggestions for work to be performed or devices added to
allow for proper balancing.
4. Method of attachment of duct hangers to building construction.
5. Certification: If required by the Authority Having Jurisdiction, submit written certification from a
nationally recognized testing agency indicating the maximum load upper attachments for securing
hangers will support, and that these attachments will not work loose by rapid and repeated
oscillation or mechanical vibration.
6. Ductwork.
a. Duct pressurization/leakage test report.
7. UFAD air distribution
a. Include floor support locations, method of attachment, size, and accessories furnished.
PART 2 - Products
1.01 Materials
A. Construct of galvanized sheet metal, except where otherwise shown or required. Duct gauges per
SMACNA and CMC.
B. Steel: ASTM A527 lock forming quality. Black or galvanized as hereinafter specified. Galvanizing: ASTM
A525 commercial coating class G-90, on both sides. Cold-rolled, soft steel sheets.
C. Ducts and Fittings:
1. United, Semco, MINA, Pacific Air Products or equal prefabricated duct and fittings.
2. Fittings shall be continuously welded or spot welded and sealed. Where zinc coating has been
burned during fabrication, fittings shall be painted by the manufacturer.
3. Tapers: Unless specifically indicated on Drawings, pitch sides of duct in “diverging” o r
“converging” airflow maximum of 1 to 4 taper.
4. Elbows and transitions:
a. Elbows:
1) Smooth radius elbows. Radius equals 1.5 times duct diameter or width. Minimum four -
piece construction for round.
725 N. Alameda Ave 23 31 00
Azusa, CA DUCT AND CASINGS
March 28, 2019
HVAC DUCT AND CASINGS 233100 - [3]
2) Short radius elbows are acceptable for locations downstream of terminal boxes, for
general exhaust ducts serving fewer than three thermostatic zones and where
specifically indicated on Drawings. Radius equals duct diameter or width. Minimum
four-piece construction for round.
3) Square turns in rectangular ducts only wher e required to facilitate installation. Provide
turning vanes except in kitchen hood exhaust ducts.
D. Duct Hangers:
1. Band Hangers: Same material as ducts, except that hangers for stainless steel ducts in
unfinished spaces may be galvanized steel.
2. Rod-Type Hangers: Mild low carbon steel, unless otherwise specified; fully threaded or threaded
each end. Unless galvanized or cadmium plated, provide a shop coat of red lead or zinc
chromate primer paint.
E. Miscellaneous Fasteners and Upper Hanger Attachments:
1. Screws:
a. Same material as sheet, except as shown.
b. On aluminum sheets, provide cadmium plated or stainless steel.
c. Zinc or cadmium plated, permitted on galvanized sheets.
d. Minimum screw size: No. 10.
2. Duct sealants:
a. High-pressure, high-velocity duct sealant for indoors.
b. Hardcast 5400 tape with Hardcast RTA 50 adhesive; or high-pressure, high velocity,
weatherproof duct sealant for outdoors.
c. Gaskets:
1) Continuous, reinforced, inert self-conforming type.
2) 1/8-inch thick.
3) Width: To match angle connection.
4) 3M Weatherban ribbon sealer or equal.
3. Spring fasteners: DZUS, Simmons Quick -Lock or equal.
a. Oval head stud and receptacle.
b. Screwdriver slot.
c. Self-ejecting.
4. Machine bolts and nuts: Galvanized or cadmium plated steel.
5. Concrete inserts: Steel or malleable iron.
725 N. Alameda Ave 23 31 00
Azusa, CA DUCT AND CASINGS
March 28, 2019
HVAC DUCT AND CASINGS 233100 - [4]
6. Welding studs: DSM Products, capacitor discharge, low carbon steel, copper flashed.
7. Self-drilled expanding fastener: Hilti or Phillips type.
8. Expansion shields: “Star Slugin”, single unit type, unless otherwise specified.
9. Electrically operated tools for installing welded studs and fasteners shall be listed by a nationally
recognized test agency.
F. Beaded sleeve round duct seams. Crimp joints acceptable for 18 inch and smaller round.
G. Pittsburgh lock longitudinal joints. No button punch snap lock for ductwork rated above +2 inches WG or
below –2 inches WG. No “S” slip or drive slip transverse joints except on branch runouts. Pocket lock
transverse joints. SMACNA TDC and/or TDF acceptable. DUCTMATE system is acceptable alternate.
H. Gasket Material:
1. For use with registers, grilles, and diffusers installed in exposed uninsulated ductwork: 1/4-inch
thick felt or sponge rubber material, of width as required by the flange on the particular device.
2. For Use with Flanged Joints in Ducts: 1/8-inch thick reinforced inert plastic on the self -conforming
type, of width as required by the particular flange.
I. Flexible Duct:
1. Insulated Flexible Duct:
a. Thermaflex, MK-E
b. Flexmaster U.S.A. Inc., Type 8-M
c. Or equal.
2. Materials
a. Insulated flexible duct acoustically designed to provide high insertion loss charac teristics.
Published flexible duct acoustical data shall be obtained in accordance with Air Diffusion
Council Flexible Air Duct Test FD72R1, Paragraphs 3.2.1, Sound Attenuation; 3.2.2, Sound
Generation; 3.2.3, Radiated Noise Reduction. Duct shall be rated for 4000 FPM velocity
minimum.
1) Flexible ducts shall consist of an exterior bi-directional fiberglass reinforced metalized
film vapor barrier, nominal 1-1/2 inches thick fiberglass insulation (K = 0.23 at 75
degrees F) with a 0.1 ASTM 96 A perm rating, and a strong, woven and coated
fiberglass fabric permanently bonded to a coated spring steel wire helix providing an
impervious, smooth, nonperforated interior liner to shield the airflow from fiberglass
erosion.
2) Connect individual lengths of flexible duct to inlet and outlet collars and branch ducts
per Air Diffusion Council (ADC) 2003 recommendations. Use heat-stabilized Nylon 6/6
or Tefzel (Dupont) ties meeting UL 2043 for continuous exposure above 200°F.
Complete connection with tape meeting ASTM E2342-03 for a test period of at least 60
days and have “CEC Approved” stamp. Cloth back adhesive tapes known to have
passed this test are as follows:
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a) Polyken 558CA or Nashua 558CA, by Berry Plastics, Tapes and Coatings Division.
b) Shurtape PC 858CA, by Shurtape Technologies.
3) Flexible ducts may be used to cross seismic joints. Provide with sufficient slack to
accommodate anticipated “design” seismic movement. See Structural Drawings.
b. Construction: In accordance with SMACN A flexible ductwork classification for minus 1 inch
to 4 inches WG.
3. Length to air outlets/grilles = five (5) feet minimum, seven (7) feet maximum.
4. Do not use flexible duct for connections through walls or gypsum board ceilings.
5. Do not use flexible duct for connections to terminal units.
6. Adhesives and Sealants: Refer to VOC limits specified in Section 01 81 13 – Sustainable
Design Requirements for adhesives and sealants applied on site, within the weatherproofing line
PART 3 - Execution
1.01 Installation
A. Ductwork:
1. Construct with gauges, joints, bracing, reinforcing, and other de tails per latest SMACNA and
CMC, unless specified otherwise.
2. Properly seam, brace, stiffen, support and seal ducts.
3. Where internal insulation or acoustical lining is applied, duct sizes as shown on the Drawings
shall represent net inside clear dimensions . Add lining thickness to determine metal duct
dimensions.
4. Adjust ducts to suit local coordination conditions. Alter duct sizes on basis of equal friction where
required to facilitate installation with no increase in Contract Sum. As duct shape affects
acoustics and pressure drops, design build contractor shall highlight (cloud) and submit any
proposed conversion of round duct to rectangular duct or rectangular to round as shop drawings
for Owner’s Representative’s review.
5. Notify Owner’s Representative where duct dimension field changes are required to conform to the
building structure or to avoid interfering with other trades.
6. Avoid penetration of ducts. Provide airtight rubber grommets at unavoidable penetrations of
hanger rods.
7. At exposed duct penetrations of walls, floors and ceilings, provide sheet metal angle type
escutcheons.
8. Duct openings: Provide openings where required to accommodate thermometers, smoke
detectors, controllers, etc.
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9. Coordinate pitot tube openings where required for testing of systems.
10. Sealant;
a. Seal with high pressure, high velocity sealant.
b. Unless otherwise allowed by this specification, adhesive type duct tape is not acceptable.
c. Some sealants can adversely affect the release function of breakaway connections to fire
dampers; consult the damper manufacturer for installation restrictions.
11. Waterproof seams and joints in ductwork exposed to the weather by application of Hardcast 5400
tape and RTA50 sealer or high velocity sealant.
12. Joints between ducts:
a. Mechanically fastened with sheet metal screws.
b. Seal per above. Apply coating of duct sealer at joints and screws.
13. Junctions between ducts:
a. Branch takeoff: 45 degrees, 90 degree with 45 degrees tapered transition or round, conical
tap- or spin-ins.
b. Where possible, avoid connecting branch ducts to bottom of main duct.
14. Plenums: Match material of connected ductwork system. Construct with gauges, joints, bracing,
reinforcing, and other details per latest SMACNA and CMC unless specified otherwise.
15. Ducts out-of-doors:
a. Construct all ducts subject to rain watertight and to insure water runoff by one or more of
following techniques:
1) Use round ducts.
2) Standing seams arranged to not act as dams.
3) Entire top of duct sloped down toward side.
4) Vertical struts within duct to bow top panels of duct into convex shape.
16. Where final branch duct is not smooth continuation of main, extend main horizontal branch duct a
minimum of one foot beyond diffuser.
17. Cap ductwork downstream from terminal filters at the end of each working day. Take special care
to keep these ducts free of dirt while work is performed.
18. Install flexible duct only where shown on mechanical drawings. Where flexible duct is installed,
the following restrictions apply:
a. Maximum turn angle 90 degrees
b. Minimum inside radius one duct diameter
c. Limit of two bends per flexible duct
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d. Support at or near mid-length with 2-inch-wide 28-gauge steel hanger collar attached to the
structure with approved duct hanger.
B. Duct Hangers and Supports:
1. General:
a. Ducts and duct support must not contact ceiling framing and wires.
2. Install hangers for ducts as specified in SMACNA
3. Upper hanger attachments:
a. Attachment to existing cast-in-place concrete:
1) Secure hangers to overhead construction with wedge anchor.
2) Secure hanger attachment required to be supported from wall to floor construction with
single unit expansion shields or self-drilling type expansion shields and machine bolts.
4. Access doors: Provide access doors in ducts for reaching fan wheels, modulating dampers and
motors, fusible links, controllers, and other movable devices. In addition, provide access doors at
all elbows upstream of turning vanes and upstream of duct coils. Not required for splitters. Access
is required for terminal air box reheat coils when noted or otherwise required.
5. Do not suspend ducts from piping, plumbing, conduits or related supports.
2.01 duct pressure testing
A. General:
1. Leak test all ductwork and plenums except for:
a. Supply duct downstream of terminal units.
b. Return duct between shaft and air inlets.
c. Exhaust systems served by fans scheduled at 2.0 in. w.g. total static pressure or lower.
d. Exhaust and outside air associated with penthouse-located AHU’s.
e. Ducts associated with fan coils or other small, unitary systems.
2. The Owner’s Representative shall select one of each of the above excepted duct systems for
pressure testing. If each of these test results indicates a “pass”, pressure testing for the excepted
system types shall be considered complete. If any of these initial tests “fail”, the Owner’s
Representative shall select another one of each excepted system for testing. This shall continue,
for each system, until each system passes the pressure test.
3. Testing shall be in presence of Owner’s Representative and before ducts are concealed.
4. Use portable high-pressure blower and necessary instruments to indicate amount of leakage.
B. Procedure:
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1. Conduct tests as specified in Section 23 05 93 – Testing, Adjusting and Balancing, as
recommended in SMACNA HVAC Air Duct Leakage Test Manual, and as follows:
2. The following table summarizes duct seal, pressure and leakage classes. Separate “pressure”
columns are included to describe duct construction duct leakage requirements.
Duct Type / Location Pressure Class Seal
Class
Metal Duct
Leakage
Class
(rect/round)
Supply air, between terminal units and
air outlets 2 inches A 24/12
Return air, between air inlets and risers. 2 inches A 24/12
Supply and return air, between fan coil
units and air outlets/inlets. 1 inch A 24/12
Exhaust air systems where scheduled
fan operating pressure <1.5 inches w.g. 2 inches. A 24/12
Exhaust air systems where scheduled
fan operating pressure <0.50 inches w.g. 1 inch. A 24/12
All others
at least as high as
associated fan’s
operating pressure
A 6/3
3. Determine amount of air leakage by makeup airflow measurements. The total leakage shall be
determined by summation of leakage for each section of system tested.
4. Noise generated from duct leakage is not acceptable.
5. Visually mark tested sections with certification sticker and initials of field test inspector.
6. Submit certification of test results.
3.01 Duct Cleaning
A. Adhere to duct cleanliness standards as described in SMACNA “Duct Cleanliness for New Construction”
guidelines. The following level guidelines shall be followed, including instructions for duct delivery, site
storage, installation, protection and production.
1. “Intermediate” for all supply air duct
2. “Basic” with additional provision for capping open work for all other systems.
END OF SECTION
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SECTION 23 33 00
AIR DUCT ACCESSORIES
PART 1 - GENERAL
1.01 DESCRIPTION OF WORK
A. Provide ductwork accessories complete for the air distribution system, as indicated on the Drawings
and as specified.
2.01 SUBMITTALS
A. Shop Drawings and Product Data:
1. Submit the following:
a. Flexible connections.
b. Turning vanes.
c. Volume dampers.
d. Backdraft dampers.
PART 2 - PRODUCTS
1.01 MATERIALS
A. Flexible Connections: Vent fabrics, Elgen "Silent duct" type SDN-6, Durodyne or equal neoprene coat-
ed fiberglass.
1. SMACNA Low Pressure Duct Manual, except as shown.
2. With metal collars.
3. At connections to fans:
a. Neoprene coated glass fabric. Maintain not less than 4 -inches metal-to-metal separation and
with fabric folds to allow for flexibility.
b. 30 ounces per square yard.
c. Sewed and cemented seams.
d. 25-flame spread, 50 smoke-developed rating.
e. For high velocity, waterproof, out of door, dishwasher and range hood appliances if allowed
by code.
B. Turning Vanes:
1. Aero/Dyne, HEP, SMACNA or equal.
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2. Galvanized steel ductwork: galvanized steel or painted black steel, except as noted.
3. Other ductwork: Same material as ductwork.
4. Low-pressure systems: SMACNA-HVAC Duct Construction Standards 1985, except as noted.
a. Single width turning vanes with 3/4-inch trailing edge and 2-inch radius for ducts 36 inches
or less in width; hollow airfoil type blades for ducts greater than 36 inches wide. Rigidly con-
nect vane rails.
b. Vane length not to exceed 36 inches. Provide separate equal size sections for greater
lengths.
5. Medium- and high-pressure systems: SMACNA-HVAC Duct Construction Standards 2008, except
as shown.
a. Small double thickness vanes with 2-inch inside radius.
b. Long radius vanes where shown or required.
6. Vane length not to exceed 36 inches. Provide separate equal size sections for greater lengths.
C. Dampers - General:
1. For all types of dampers, fabricate damper blades, axles, frames, etc., of the same material as
ductwork in which they are to be installed.
D. Volume and Splitter Dampers:
1. Ruskin, Terri, American Warming, or equal.
2. Provide where required to provide complete air balance and where shown on drawings. Coordi-
nate with air balance firm. Not all dampers are shown.
3. In ducts greater than 9 inches high, provide opposed-blade-type dampers with frames of mini-
mum 16 gauge formed channel, minimum 3-1/2 inches wide with minimum 7/8-inch deep flanges.
4. In ducts 9 inches high or less, provide single-blade dampers with frames of minimum 4-1/2-inch
by 12-gauge material.
5. Blades: 16 gauge minimum. Blades in multiblade dampers: 8 inches wide maximum.
6. Axles 1/2-inch round minimum or hexagonal stock.
7. Bearings: Molded synthetic material or bronze oilite, spacing 48 inches maximum.
E. Backdraft dampers:
1. Ruskin, Air Balance , American Warming or equal.
2. Gravity backdraft dampers, size 18 x 18 inches or smaller, furnished with air moving equipment,
may be air moving equipment manufacturer's standard construction.
3. Fabricate multi-blade, parallel action gravity balanced backdraft dampers of 16 gauge galvanized
steel or extruded aluminum, with blades of maximum 6 inch width. Provide with felt or flexible vi-
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nyl sealed edges, linked together in rattle-free manner with 90 degree stop, steel ball bearings
and plated steel pivot pin; adjustment device to permit setting for varying differential static pres-
sure. Provide Ruskin, American Warming and Ventilation or equal. For dampers installed in stain-
less steel ducts provide dampers of the same material as the ductwork.
F. Duct Test Openings:
1. Ventfabrics No. 699, located where air measurements are required for balancing air systems.
Coordinate with balancing firm.
G. Flashing:
1. 16 gauge ducts through roof, galvanized steel, flashed and counterflashed, and provided with
storm collars to secure watertight construction.
H. Bird Screens:
1. No. 14 gauge, 1/2-inch galvanized wire mesh set in galvanized steel frame.
I. Equalizing Grid:
1. 3-inch thick aluminum honeycomb grid with 3/8-inch openings securely fastened inside a 16
gauge galvanized steel duct section 6 inches long.
2. Grid and casing in outside air intake duct 304 stainless steel.
PART 3 - EXECUTION
1.01 INSTALLATION
A. Install ductwork accessories in accordance with the manufacturer’s printed instructions.
B. Provide ductwork connected to air-handling equipment or air inlet and outlet devices, with all neces-
sary transformation pieces, flexible fabric connections, as shown or required.
1. For round duct connection, install fabric connectors a minimum of 3 inches in length for ducts
having a maximum diameter of 18 inches and a minimum of 5 inches in length for duct diameters
over 18 inches in size.
2. Secure fabric connectors tightly to fans, casings and ducts as follows:
a. Secure round connectors with No. 12 USS gauge by 1 inch wide galvanized steel draw
bands. Secure bands with bolts and nuts.
b. Secure rectangular connectors with 1 inch by 1/8-inch thick flat galvanized steel bars, with
screws or bolts on 8-inch centers maximum, or with sheet metal slip joints. Tightly crimp fab-
ric into sheet metal joint and secure complete joint with sheet metal screws on 6-inch centers
maximum.
3. Allow at least 3 inch slack in connections.
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4. Fabric connectors may be factory pre-fabricated pre-assembled units, with minimum No. 24-
gauge metal edges, secured to fabric with double lock seams.
5. Do not paint fabric connectors.
6. Install also in ducts at structural expansion joints.
END OF SECTION