ESBD_File_353553_MCD CP766229 24CSP010_ Addendum #1.pdf

Project Management & Construction Services P.O. Drawer 7580 • Austin, TX 78713-7580 •phone (512) 471-3042 • fax (512) 471-9942

MCD CP766229 04102024 ADD1-1

April 10, 2024

ADDENDUM:

To: All Specification Holders

Via: Trina Bickford, Assistant Director, Contracts

From: John VerShaw, Project Manager

Re: ADDENDUM NO. 1 to the Request for Proposal Documents for

(M53) HET HVAC REPLACEMENT

HOBBY-EBERLY TELESCOPE (MCD)

Contract 24CSP010 Project # CP766229

This Addendum is a part of the Documents for the above-named project and shall become an integral part of the originally issued Contract Documents dated 03/14/2024. Wherein the items of Addenda differ from the original Specifications and/or Drawings, this Addendum shall take precedence. All other terms and conditions not specifically affected by this Addendum will remain unchanged. Revise the Specifications and Drawings referenced below as described. This Addendum contains sheets ADD1-1 through ADD1-4 and attachments: Section 7, Section 23 50 00 – Modular Chiller Plant, Section 23 73 13 – Modular Outdoor Central Station Air Handling Units, Sheet M0.2 – SCHEDULES – HVAC, and Sheet M0.3 – SCHEDULES – HVAC.

The Bidder shall acknowledge receipt of this Addendum by inserting its number in the Proposal Form.

I. GENERAL

ITEM 1: REVISED - Request for Proposals – Section 7 – Pricing and Delivery Schedule

SEE attached “REVISED Section 7 – Pricing and Delivery Schedule” for revised and additional Alternates, (PDF) to be used for Proposal Submission.

II. SPECIFICATIONS

ITEM 4: Specification – TABLE OF CONTENTS

Add the following items to the Specifications Table of Contents:

23 50 00 – MODULAR CHILLER PLANT

23 73 13 – MODULAR OUTDOOR CENTRAL-STATION AIR

HANDLING UNITS

ADDENDUM NO.1

(M53) HET HVAC REPLACEMENT

24CSP010

MCD CP766229 04102024 ADD1-2

ITEM 5: Specification – 01 23 00 – ALTERNATES

Section 3.1 ADD the following paragraphs:

Alternate #2 – Air Handling Units Base Bid: Furnish and install custom air handling units per specification section 237300 and Air Handling Unit Schedules – Base Bid.

Alternate #2: Furnish and install modular air handling units per specification section 237313 and Air Handling Unit Schedules – Alternate #2.

Alternate #3 – Variable Frequency Drives Base Bid: Furnish and install 12-pulse VFDs, as specified.

Alternate #3: Furnish and install 6-pulse VFDs. Verify that VFDs meet all IEEE 519 requirements as noted in specification section 232900.

ITEM 6: Specification – 23 09 23 – DIRECT DIGITAL CONTROL SYSTEMS

FOR HVAC

ADD the following Article:

1.11 SPECIAL REQUIREMENTS

A. At the conclusion of the project warranty period, the BAS controls provider shall provide the Owner with an unlocked BAS system that allows the Owner to make detailed programming modifications to meet the needs of the facility without the requirement to purchase additional licenses or software add-ons.

ITEM 7: Specification – 23 50 00 – MODULAR CHILLER PLANT ADD this specification section in its entirety.

ITEM 8: Specification – 23 64 27 – AIR-COOLED WATER CHILLER WITH

SCROLL COMPRESSORS

Article 2.20 Add “JCI Quantech” as an approved manufacturer.

ITEM 9: Specification – 23 73 00 – AIR HANDLING UNITS Article 2.1 Add “Thermal Corporation” as an approved manufacturer.

Article 2.3(B)(5) Change the minimum insulation thickness from 4” to 3-1/2”.

ITEM 10: Specification – 23 73 13 – MODULAR OUTDOOR CENTRAL-

STATION AIR HANDLING UNITS

ADD this specification section in its entirety.

(M53) HET HVAC REPLACEMENT

MCD CP766229 04102024 ADD1-3

III. DRAWINGS

ITEM 11: Sheet M0.2 – SCHEDULES - HVAC ADD fan schedule for the Base Bid and for Alternate #2. Modify the AIR HANDLING UNIT schedule.

ITEM 12: Sheet M0.3 – SCHEDULES - HVAC Modify the Variable Frequency Drive Schedule. Added notes for the Base Bid and for Alternate #3.

ITEM 13: Sheet M8.3 – DETAILS - HVAC

For the base bid, the AHU will be 90” tall and approximately 12,000 lbs. For Alternate #2, the AHU will be 78” tall and approximately 6,400 lbs. The length and width of both units will be the same.

IV. CLARIFICATIONS

ITEM 14: QUESTIONS/ANSWERS: The following questions were received after the Pre-Proposal Conference. Answers are inserted.

Question # 1: During the removal and replacement of the electrical gear, normal utility power will be down. Is it acceptable for the Contractor to utilize temporary power from the existing backup generator?

Response: Yes. The Contractor shall submit a detailed plan to utilize temporary power to UT and the Engineer for review and approval prior to the utility power shutdown.

Question # 2: We noticed there are two different Davis Bacon wage rate tables in the bid documents - one for UT work alone, and one for federally funded work. Are there federal funds for this project and is this being funded by a shovel-ready funding program? Please confirm if this is a Buy American Act project.

Response: According to Section 4.26 of the UGC's, UT Austin projects not located in the Travis County / Austin area are subject to the federal Davis Bacon wage rates. The other table is for work that takes place inside of the Travis County / Austin area.

Question # 3: Are there any fees or costs from AEP Texas (the local electric utility) for the transformer change-out to be included in the contractor's bid?

Response: The contractor should contact AEP directly to determine any fees/costs that must be included in the bid.

(M53) HET HVAC REPLACEMENT

MCD CP766229 04102024 ADD1-4

Question # 4: Is this a Buy American project? I haven't found a requirement to do so, but I noticed all of the valves specified are manufactured in America by model number codes.

Response: There are currently no requirements for the project to be "Buy American." The contractor should meet or exceed all requirements in the construction documents.

Question # 5: Regarding the relocation of the existing drain line, can UT provide any information about the piping depth or the soil conditions of the new routing path?

Response: No as-built information is available for this existing drain line.

Based on the size of the system, it should be safe to assume the depth of this line is about four to five feet below grade.

END OF ADDENDUM NO. 1

MCD CP766229 REV-04102024 RFP-33

SECTION 7 (ref 3.2.1.2)

PRICING AND DELIVERY SCHEDULE

for

(M53) HET HVAC REPLACEMENT

RFP and CONTRACT NO.: 24CSP010

Please note: the score for pricing/delivery will constitute a maximum of 55 points of the overall score of 100 points.

Submission Date:___________________________ PROPOSAL submitted by:

(Full Legal Name of Firm Responding)

(Respondent Web Site Address) (if available)

(Contact Email Address)

(Street Address)

(City) (State) (Zip)

(Mailing Address)

(City) (State) (Zip)

(Telephone No.) (Fax No.)

(UT Vendor Identification No. - VIN#) [State or Federal Tax No. (EIN)]

Having carefully examined the ALL details of this RFP including but not limited to the Uniform General Conditions, Additional General Conditions, Owner’s Special Conditions, the Drawings and Specifications and all addenda issued, as prepared by and for Campus Construction, The University of Texas at Austin, as well as the Project premises and all the conditions affecting the work, the undersigned proposes to furnish all labor, materials, and equipment necessary to complete the entire work in accordance with the Contract Documents for the following sum:

Dollar amounts for Base Proposal and all Alternates (if any) shall be shown in both written and numerical formats. In case of discrepancy between the written amount and the numerical amount, the written amount shall govern.

MCD CP766229 REV-04102024 RFP-34

BASE PROPOSAL, GENERAL CONTRACT (Inclusive Cash Allowance) (Exclusive of alternate proposals.)

DOLLARS ($ )

PROPOSAL ALTERNATES, GENERAL WORK: The Owner reserves the right to accept or reject any alternate in the order of its own choosing.

SCHEDULE OF ALTERNATES:

Alternate #1 DDC System Sensors: Additional HVAC control sensors and accessories as noted on sheet M7.1 and M7.2.

ADD TO the Base Bid, the sum of:

DOLLARS ($ )

Alternate #2 Air Handler Units: Furnish and install modular air handler units per specification 237313 and Air Handler Unit Schedules – Alternate #2

DEDUCT FROM the Base Bid, the sum of:

Alternate #3 Variable Frequency Drives: Furnish and install 6-pulse VFDS that meet all

IEEE 519 requirements as noted in specification section 232900.

DEDUCT FROM the Base Bid, the sum of:

UNIT PRICES FOR GENERAL CONSTRUCTION: The undersigned further agrees that in case additional work or material is authorized from what is shown in the Contract as originally awarded, the following items of unit prices will be used in adjusting the Contract Price. The unit prices include overhead, profit, miscellaneous devices, appurtenances and similar items incidental to or required for a complete installation whether or not mentioned as part of the Unit Price, etc.

Unit prices to be used for adjusting the Contract Price for more work or less work or material will be 100% of these amounts.

If, after the Contract Sum is established and contract signed, the Owner chooses to change the scope of work in an area described by Unit Prices, the Unit Prices proposed on the proposal form will prevail in establishing a change order proposal. Said contract change order will be processed in the same manner as described elsewhere in this RFP. Payment to Contractor cannot be guaranteed for any work performed outside the Contract which has not been formally added by an executed change order.

MCD CP766229 REV-04102024 RFP-35

SCHEDULE OF UNIT PRICES: NONE

DURATION OF CONSTRUCTION:

All work for this project must be completed within 425 CALENDAR DAYS of the start date indicated in the Notice to Proceed.

ADDENDA:

Receipt is hereby acknowledged of the following addenda:

No. No. No. No. No.

LIQUIDATED DAMAGES:

The undersigned further agrees that, from the compensation otherwise to be paid, the Owner may retain the sum of $1,000 for each calendar day after the Contract completion date that the work remains incomplete or Owner is unable to occupy, which sum is agreed upon as the proper measure of Liquidated Damages which the Owner will sustain per diem by the failure of undersigned to complete the work at the time stipulated in the Contract. Liquidated Damages shall run until the project is completed. This sum is not construed in any sense as penalty.

Additional Liquidated Damages: None

SUBMITTAL OF COMPLETED CONTRACT DOCUMENTS:

The undersigned agrees, if awarded the Contract, to execute the Contract, Performance and Payment Bonds, Certificate of Insurance and Certification of Franchise Tax Payment within SEVEN (7) CALENDAR DAYS after receipt of the contract and to commence work on the commencement date stated by the Owner in a Notice to Proceed.

PROPOSAL LETTER OF BONDING CAPACITY:

Proposals totaling $25,000.00 or more must include a letter from an approved Bonding Company indicating that the Respondent has bonding capacity equal to or exceeding the Maximum Possible Award (including consideration of additive alternates) of the Proposal submitted. The awarded Respondent shall promptly supply a Payment Bond as well as a Performance Bond if the Maximum Possible Award is over $100,000.00 in the full amount of the awarded contract. The letter from the Bonding Company shall be submitted with the proposal in Submission No. 1 as stated in the

RFP.

The letter from the Bonding Company shall be submitted with the Proposal in Submission No. 1;

as stated in the RFP.

WAGE RATES: (REFERENCE ARTICLE 2.2 IN UGC AND AGC)

This project IS NOT funded or partially funded by Federal Funds. If Federally Funded, the awarded Contractor must follow all requirements as indicated in the Additional General Conditions, Article 2.2.5.

MCD CP766229 REV-04102024 RFP-36

PARTICIPATION BY HISTORICALLY UNDERUTILIZED BUSINESSES:

For proposals totaling $100,000.00 or more, the awarded Respondent must submit a “HUB Subcontracting Plan” WITH ALL APPLICABLE ATTACHMENTS, no later than the deadline indicated in this RFP or addenda issued. Owner may reject any response that does not include a fully completed “HUB Subcontracting Plan” as required in this RFP. The “HUB Subcontracting Plan” must comply with and adhere to all conditions of Exhibit H included in this RFP.

Owner reserves the right to accept or reject any and all Proposals and to waive Proposal irregularities. Proposals submitted in response to this RFP shall be valid and not withdrawn for a minimum period of one hundred and twenty (120) calendar days from the RFP opening date and time.

ACCEPTANCE OF PROPOSAL OR AWARD OF CONTRACT:

By signing this proposal, the undersigned certifies that they are in compliance with all State laws applicable in offering proposals to a State entity including, but not limited to, the following:

“Under Section 2155.004, Government Code, the vendor certifies that the individual or business entity named in this Proposal or contract is not ineligible to receive the specified contract and acknowledges that this contract may be terminated and payment withheld if this certification is inaccurate.”

“Under Section 231.006, Texas Family Code, the vendor or applicant certifies that the individual or business entity named in this contract, Proposal, or application is not ineligible to receive the specified grant, loan, or payment and acknowledges that this contract may be terminated and payment may be withheld if this certification is inaccurate.”

Offer executed on behalf of Respondent

By

(Signature)

Typed or Printed Full Name and Title

Full Name of President of Corporation or Owner/Sole Proprietor of Non-Corporation

Full Name of Corporate Secretary

Complete applicable information:

A Corporation, chartered in the State of , authorized to do business in the State of Texas.

A partnership, composed of , and .

An individual, operating under the name of: .

A Limited Liability Company, composed of: ____________________________________.

A Joint Venture, operating under the name of: , and .

SEAL / SIGNATURE:

CAPITAL PROJECT NUMBER:

SHEET NUMBER:

SHEET TITLE:

PMCS PROJECT MANAGER:

SHEET ISSUE DATE

DESIGN & CONSTRUCTION STANDARDS VERSION:

ORIGINAL ISSUE DATE

BUILDING ABBREVIATION - NUMBER:

BUILDING NAME:

PROJECT ADDRESS:

PROJECT TITLE:

CONSULTANT:

CP#766229

MCD: (M53) HET

HVAC

REPLACEMENT

MCDONALD OBSERVATORY:

HOBBY-EBERLY TELESCOPE

32 MT. FOWLKES RD

FORT DAVIS, TX 79734

MCDONALD OBSERVATORY

03/05/24

ISSUE LOG

NO DATE DESCRIPTION

MCD: (M53) HET

JOHN VERSHAW

SEPT 2021

0 03/05/2024 100% CD

M0.2

SCHEDULES - HVAC

03/05/24

1 04/10/2024 ADDENDUM #1

SEAL / SIGNATURE:

CAPITAL PROJECT NUMBER:

SHEET NUMBER:

SHEET TITLE:

PMCS PROJECT MANAGER:

SHEET ISSUE DATE

DESIGN & CONSTRUCTION STANDARDS VERSION:

ORIGINAL ISSUE DATE

BUILDING ABBREVIATION - NUMBER:

BUILDING NAME:

PROJECT ADDRESS:

PROJECT TITLE:

CONSULTANT:

CP#766229

MCD: (M53) HET

HVAC

REPLACEMENT

MCDONALD OBSERVATORY:

HOBBY-EBERLY TELESCOPE

32 MT. FOWLKES RD

FORT DAVIS, TX 79734

MCDONALD OBSERVATORY

03/05/24

ISSUE LOG

NO DATE DESCRIPTION

MCD: (M53) HET

JOHN VERSHAW

SEPT 2021

0 03/05/2024 100% CD

M0.3

SCHEDULES - HVAC

03/05/24

1 04/10/2024 ADDENDUM #1

SECTION 23 50 00 – MODULAR CENTRAL PLANT

MCD HET CP766229 100%CD – 03/05/24 23 50 00 – 1 of 12

SECTION 235000 – Modular Central Plant

PART 1 - GENERAL

1.1 SUMMARY

A. This Section includes the following configuration within the Package Central Plant (PCP)

1. Cooling-only

1.2 DEFINITIONS

A. Finished Spaces: Spaces other than mechanical and electrical equipment rooms, furred spaces, pipe and duct shafts, unheated spaces immediately below roof, spaces above ceilings, unexcavated spaces, crawlspaces, and tunnels.

B. Exposed, Interior Installations: Exposed to view indoors. Examples include finished occupied spaces and mechanical equipment rooms.

C. Exposed, Exterior Installations: Exposed to view outdoors or subject to outdoor ambient temperatures and weather conditions. Examples include rooftop locations.

D. Concealed, Interior Installations: Concealed from view and protected from physical contact by building occupants. Examples include above ceilings and in duct shafts.

E. Concealed, Exterior Installations: Concealed from view and protected from weather conditions and physical contact by building occupants but subject to outdoor ambient temperatures.

Examples include installations within unheated shelters.

1.3 SUBMITTALS

A. Product Data: For each model indicated.

B. Shop Drawings: Detail equipment assemblies and indicate dimensions, weights, loads, required clearances, method of field assembly, components, and location and size of each field connection.

1. Dimensioned plan and elevation views, including required clearances, weights, location of all piping and electrical connections.

2. Flow Diagrams indicating equipment and piping configuration for field interface and field connections, accessories and instrumentation.

3. Control Diagrams indicating control system architecture, sequence of operation and BAS interfacing points list.

4. Wiring Diagrams indicating field and factory wiring.

5. Summaries of all auxiliary utility requirements such as: electricity, water, air, etc. Summary shall indicate quantity of each required utility.

6. Documentation of all major components.

7. Hydronic Specialties Thermometers, Gages, and instrumentation

8. Pumps

9. Air Separators

10. Chillers

11. Water Meters

MCD HET CP766229 100%CD – 03/05/24 23 50 00 – 2 of 12

12. Fans, Louvers, and Dampers

13. Pipe, Tube and Fittings.

14. Valves

15. Mechanical Insulation

16. Controls and devices

17. Electrical Panel Boards

18. Electrical Transformers

19. Lighting

20. Disconnects and Switches

21. One electrical wiring diagrams

22. Installation Instructions.

23. Detail mounting, securing, and flashing of roof curb to roof structure. Indicate coordinating requirements with roof membrane system.

24. Wiring Diagrams: Power, signal, and control wiring.

25. Field quality-control test reports.

26. Warranties: Special warranties specified in this Section.

C. Design Data

1. Chiller performance

2. Cooling tower performance

3. Pump selection curves

D. Manufacturer’s Instructions

1. Water Chiller-Installation Instructions

2. Variable Frequency drives

3. Water Treatment System

E. Factory Test reports

1. Factory chiller performance test

2. Control System point to point

3. Piping pressure test

4. Electrical point to point testing (Hi-Potential test)

5. Manufactures Start-up

F. Operation and Maintenance Data

1. Operation and Maintenance Manuals

G. Closeout Submittals

1. Warranties

2. Bill of Materials

1.4 QUALITY ASSURANCE

A. Shall be ETL listed per UL 1995 4th edition, issued October 14, 2011

B. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70, Article 100, by a testing agency acceptable to authorities having jurisdiction, and marked for intended use.

C. Fabricate and label refrigeration system to comply with ASHRAE 15, "Safety Code for Mechanical Refrigeration."

D. Energy-Efficiency Ratio: Equal to or greater than prescribed by ASHRAE 90.1, "Energy Efficient Design of New Buildings except Low-Rise Residential Buildings."

MCD HET CP766229 100%CD – 03/05/24 23 50 00 – 3 of 12

1.5 CODES AND STANDARDS

A. The PCP shall be assembled with components that conform to the latest edition of the following as applicable:

1. Air Movement and Control Association, Inc. (AMC)

2. National Electrical Manufacturers Association (NEMA)

3. All electrical components and assemblies must comply and be selected with NEMA standards or IEC when specified.

4. International Plumbing Code (IPC)

5. Sheet Metal and Air Conditioning Contractors National Association, Inc. (SMACNA)

6. ETL Testing Laboratories, Inc. (ETL)

7. Underwriters Laboratories, Inc. (UL)

8. Cooling Tower Institute (CTI)

9. Air Conditioning and Refrigeration Institute (ARI)

10. American National Standards Institute (ANSI)

B. Chiller(s)

1. American Society of Mechanical Engineers (ASME)

2. ARI Certification: Signed by manufacturer certifying compliance with requirements in

ARI 550/590, "Water Chilling Packages Using the Vapor Compression Cycle."

3. ASHRAE Certification: Signed by manufacturer certifying compliance with ASHRAE 15 for safety code for mechanical refrigeration.

4. Comply with ASHRAE Guideline 3 for refrigerant leaks, recovery, and handling and storage requirements.

5. ASME Compliance: Fabricate and label water chiller heat exchangers to comply with

ASME Boiler and Pressure Vessel Code: Section VIII, Division 1.

6. Comply with NFPA 70.

7. Comply with UL 1995.

1.6 SUMMARY

A. Furnish a complete self-contained factory-assembled ETL listed PCP as indicated on the drawings and as specified herein. The PCP shall be suitable for outdoor application and shall be complete with, but not limited to, the following equipment, components and accessories as specified and must meet the physical dimensions as specified herein or shown on the designed drawings.

B. The PCP shall be engineered and designed by the PCP manufacturer for the equipment capacity, equipment and piping layout and configurations, water flow rates, air flow rates, and pump total dynamic head and fan static pressure as indicated per engineers the design intent.

1.7 WARRANTY

A. Special Warranty: Manufacturer's standard form in which manufacturer agrees to replace components of PCP that fail in materials or workmanship within specified warranty period.

1. Warranty Period for Compressors: Manufacturer's standard, but not less than one year from date of Start-up.

2. Warranty Period for Modular Central Plant: Manufacturer's standard, but not less than one year from date of Start-up.

MCD HET CP766229 100%CD – 03/05/24 23 50 00 – 4 of 12

PART 2 - PRODUCTS

A. General Construction: – The PCP shall be factory assembled and shipped in once piece except where (a) otherwise specified and (b) where trailer physical limitations prevent such shipment. If this occurs, the PCP shall be shipped in sections for field re-assembly by others. The design shall be such that all equipment, piping and related components required for system operation shall be contained within and air conditioned (40°F minimum to 95°F maximum inside design temperature) weatherproof enclosure as detailed in this specification section. The only exception to this shall be the factory supplied electrical distribution panels, condenser water and associated piping and supports.

B. Description: Factory assembled and tested; designed for exterior installation; consisting of air cooled chillers, chilled water pumps, variable frequency drives for pumps, direct digital controls, ventilation fan, unit heater, indirect waste drainage system, Medium voltage distribution system, low voltage raceway distribution system, Electrical conductors Medium and low voltage, Electrical distribution panels and transformers, exterior envelope and access doors, Hydronic piping, Domestic water distribution, DWV Indirect waste system.

2.2 MANUFACTURERS

A. Manufacturers: Subject to compliance with requirements, provide products by one of the manufacturers specified.

B. Manufacturers:

1. Daikin Applied Americas INC.

2. Envirosep

3. Systecon

4. Approved manufacturer

C. UNIT LABELING

1. Each module contained within the PCP shall be an ETL listed piece of equipment, including the chilled water system equipment, chillers, and associated water pumps.

2. All components used in the construction of the PCP shall be constructed in accordance with UL and/or ETL requirements.

2.3 STRUCTURAL STEEL

A. Shall be manufactured of structural steel and shall be of a combination of welded and bolted design. Bolted construction required for field assembly of shipping demounts and/or other locations where removal of structural component is necessary for equipment access.

B. All Structural steel exposed to ambient shall have a galvanized zinc coating applied by the hot-dip process according to ASTM A123 finish.

C. All interior structure steel shall be primed and painted.

D. All critical load bearing points shall be engineered and certified for structural integrity to meet both stationery and shipping thrust inertia.

E. The entire enclosure and cooling tower support steel shall be designed to meet or exceed the loading (140 MPH wind, snow/sand, live and dead loading, lifting) as required for the site specific criteria outlined in the relevant parts of this specification.

MCD HET CP766229 100%CD – 03/05/24 23 50 00 – 5 of 12

F. The deck shall be a minimum of 3/16” diamond floor plate hot-dipped galvanized steel welded to the structural base. Bolting of the deck to the base steel will not be permitted.

G. The structural steel base ( enclosure) shall be insulated with a closed cell, polyurethane foam system designed for spray applications.

1. The insulation shall have a minimum R-value of 6.26 per inch.

2. The insulation thermal properties shall be verified by actual test values in accordance with the ASTM C 518 steady state thermal transmission test method. The insulation shall meet or exceed the following physical properties:

a. Compressive Strength: 15-20 psi

b. Core Density: 2.0 pcf

H. A manual steel gantry or other permanent means of motor removal shall be provided to allow for the removal of chiller compressor motors and pump motors without the need for removing the roof panels for all motors over 100 lbs.

2.4 ENCLOSURE PANELS

A. All wall and roof panels shall be constructed of a foam core, galvanized steel exterior and interior metal substrate coated with a polyester finish and shall incorporate a double tongue and groove joint that shall be gasketed and mechanically fastened to the wall and roof frame. Required access to equipment within the enclosure shall be accomplished through designated access doors within the wall panel sections.

1. The wall and roof panel as a minimum shall meet the following specifications:

2. Panel Construction: Galvanized steel exterior and interior substrate with a composite polyester coating covering a continuous CFC-free foamed-in-place polyisocyanurate (polyurethane) foam core.

3. The panel shall have a Factory Mutual Class 1 approval for wall and roof construction in accordance with the full-scale FM 4880/4471 test program with no height restriction

B. Wall Panels

1. Wall Panel Thickness: 2 inches and shall have an overall R-Value of 16.0. The panel thermal properties shall be verified by actual test values in accordance with the ASTM C 518 steady state thermal transmission test method.

a. Aged K factor shall not exceed 0.14 @ 75°F mean temperature or 0.13 @ 40°F mean temperature.

b. The panel’s ability to withstand positive and negative design loads shall be verified by testing in accordance with ASTM E 72 vacuum chamber method with the standard deflection criteria to be L/180.

c. Finish: The interior metal substrate shall include a 20-year polyester coating to a total dry thickness of 1.0 mil including primer. The exterior metal substrate shall include a 30-year ceramic polyester finish to a total dry thickness of 1.0 mil including primer. Color shall be “Imperial White”.

d. Wall Panel Facing (Exterior): Exterior substrate shall be flat with heavy embossing, minimum 26ga G90 galvanized steel with a double tongue and groove off set design.

e. Wall Panel Facing (Interior): Interior substrate shall be lightly planked mesa ribs on 2.22” centers, minimum 26ga G90 galvanized steel with a double tongue and groove off set design.

C. Roof Panels (Foam-in-place Polyisocyanurate Core)

1. The OneDek® Insulated Metal Panel system shall be certified through IAPMO Uniform

Evaluation Services or equal.

2. Roof Panel Thickness: Minimum 2-1/2 inches (53.5 mm) and shall have a minimum overall

R-Value of 21.0. The panel thermal properties shall be verified by actual test values in

MCD HET CP766229 100%CD – 03/05/24 23 50 00 – 6 of 12 accordance with the ASTM C 518 steady state thermal transmission test method. Aged K factor shall not exceed 0.14 @ 75°F mean temperature or 0.13 @ 40°F mean temperature.

3. The panels shall have a flame spread no less than 25 and a smoke developed rating no less than 450 in accordance to ASTM E84.

4. The polyisocyanurate foam core shall meet or exceed the following physical properties:

a. Compressive Strength (ASTM D1621): 14 psi

b. Density, in-place (ASTM D1622): 2.0 to 2.5 pcf

c. Shear Strength (ASTM D1623): 14 psi

d. Closed Cell Content (ASTM D6226): 91%

e. Dimensional Stability (ASTM D 2126):

1) 14 days aged

2) -20°F < 1% change

3) 158°F Dry Heat < 1.5% change

4) 158°F Humid Heat < 4.5% change

5. Roof Panel Facing (Exterior): Minimum 26ga G90 galvanized steel with an overlapping side joint or 20-guage B-Deck.

6. Roof Panel Facing (Interior): Minimum 26ga G90 galvanized steel sheet.

7. TPO Membrane, pre-applied factory adhesive, 60 mil thickness, heat weld, White color

2.5 DOORS

A. Man doors

1. Face sheet thickness and steel type

a. Interior

1) Face Sheets, minimum steel thickness: 0.032 in. (0.8 mm).

2) Steel Type, cold-rolled or hot-rolled with zinc coated min A25 (ZF75)].

b. Exterior

1) Face Sheets, minimum steel thickness: 0.042 in. (1.0 mm).

2) Steel Type, zinc-coated, coating designation: Minimum (G40 (Z120)].

2. Vertical Edges: Bend edges true and straight, and of minimum radius for the thickness of metal used. Edge profile on both vertical edges of doors as follows (unless hardware dictates otherwise)

a. Single acting doors

1) Hinge edge, Beveled - 1/8 in. in 2 in. or square.

2) Lock edge, Beveled - 1/8 in. in 2 in.

3) Double acting doors, rounded on 2-1/8 in. radius.

3. Vertical Edge Seams: continuously welded, intermittently welded or continuously interlocking or lock-tab.

a. Intermittently welded, projection, spot or tack weld 6 in. (152 mm) on center maximum spacing. Finished smooth with no visible welds or weld marks on the exposed edge, presenting either a visible seam or seam filled and finished smooth such that it is not visible at both edges.

b. Continuous interlocking or lock-tab, extending full height of the door. Results in a visible seam at both edges of the door.

4. Top and Bottom Edges

a. Interior, close with a flush or inverted steel channel, not less than 0.053 in. thick, welded to both face sheets.

5. Nominal Thickness - 1.75 in.

6. Core

a. Polyurethane: Rigid cellular board laminated to both face sheets or foamed-in-placed, minimum 1.8 pound per cubic foot (29 kilograms per cubic meter) density, containing no urea formaldehyde resins.

2.6 PIPE INSULATION

MCD HET CP766229 100%CD – 03/05/24 23 50 00 – 7 of 12

1. Refer to specification sections 230700, 230716, and 230719.

2.7 GENERAL REQUIREMENTS FOR VALVES

A. Refer to specification 230523.

2.8 BRONZE BALL VALVES

A. Refer to specification 230523.

2.9 IRON, SINGLE-FLANGE BUTTERFLY VALVES

A. Refer to specification 230523.

2.10 CONTROL VALVES

A. Refer to specification 230923.

2.11 METERS and GAGES

A. Refer to specification 230519.

2.12 PRESSURE GAGES

A. Refer to specification 230519.

2.13 TURBINE FLOWMETER: Insertion type; measures flow directly in gallons per minute.

A. Manufacturer:

1. Badger Meter, Inc., Industrial Div.

2. Bailey-Fischer & Porter Co.

3. Engineering Measurements Co.

4. Flow Research Corp.

5. George Fischer Signet, Inc.

6. Onicon, Inc.

B. Construction: Bronze or stainless-steel body and plastic turbine or impeller, with integral direct-reading scale.

1. Pressure Rating: 150 psig minimum.

2. Temperature Rating: 180 deg F minimum.

3. Display: Visual instantaneous rate of flow

4. Accuracy: Plus or minus 2-1/2 percent.

2.14 WATER METERS: registers flow in gallons or cubic feet.

A. Manufacturer:

1. ABB Water Meters, Inc.

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2. Badger Meter, Inc., Industrial Div.

3. Carlon Meter Co., Inc.

4. Grinnell Corp., Mueller Co., Hersey Products Div.

5. Hersey Measurement Co.

6. Water Specialties Corp.

2.15 PLUMBING PIPING SYSTEMS

A. Refer to specification 232000, 232013, 232113, and 232126.

2.16 COPPER TUBE AND FITTINGS

A. Refer to specification 232000, 232013, 232113, and 232126.

2.17 STEEL PIPE AND FITTINGS

A. Refer to specification 232000, 232013, 232113, and 232126.

2.18 HYDRONIC SPECIALTIES

A. Refer to specification 232000, 232013, 232113, and 232126.

2.19 SPLIT COUPLES VERTICAL IN-LINE PUMPS

A. Refer to specification 232123.

2.20 CHILLER(s)

A. Refer to specification 236427.

2.21 VENTILATION FAN

A. Fan shall be wall mounted, direct driven, propeller exhaust fan.

B. Fan shall be manufactured at an ISO 9001 certified facility. Fan shall be ETL or UL Listed. Fan shall bear the AMCA certified ratings seal for sound and air performance.

C. Fan shall be of bolted and welded construction utilizing corrosion resistant fasteners. The motor shall be mounted on a 14 Ga. Steel mounting plate and power assembly. The power assembly shall be bolted to a minimum 14 Ga. steel wall panel with continuously welded corners and an integral venturi. Unit shall bear an engraved aluminum nameplate. Nameplate shall indicate design CFM and static pressure. Unit shall be shipped in ISTA certified transit tested packaging.

D. All steel fan components shall be baked polyester powder coating or equal. Each component shall be subject to a five stage environmentally friendly wash system, followed by a minimum 2 mil thick baked powder finish. Paint must exceed 1,000 hour salt spray under ASTM B117 test method.

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E. Propeller shall be cast aluminum airfoil design with cast aluminum hub. The blade pitch shall be factory set and locked using set screws and roll pin. The hub shall be keyed and locked to the shaft utilizing two set screws or a taper lock bushing. Propeller shall be balanced in accordance with AMCA Standard 204-05, Balance Quality and Vibration Levels for Fans.

F. Motor shall be Nema design B with class B insulation rated for continuous duty and furnished at the specified voltage, phase and enclosure.

2.22 VARIABLE FREQUANCY DRIVES

A. Refer to specification 232900.

2.23 CHEMICAL WATER TREATMENT SYSTEMS

A. Refer to specification 232500.

2.24 PANELBOARDS

A. Refer to specification 262413.

PART 3 - EXECUTION

3.1 FABRICATION

A. Equipment, components, and accessories to be inclusive as part of the Modular Plant:

1. Enclosure including structural frame and supports, casing, skid and rigging, flooring, roof, doors, service access, and finishes.

2. Internal environmental requirements.

3. Emergency ventilation package.

4. Scroll chillers.

5. Pumps.

6. Piping.

7. Electronic speed controllers.

8. Insulation.

9. Identification.

10. Control system provided and installed by the controls contractor.

11. Electrical.

B. SERVICE INTERFACES

1. Mechanical

a. The PCP manufacturer shall provide supply and return chilled water and condenser water connections per the design intent.

2. Plumbing

a. Installing contractor to provide building water connection for make-up water in compliance with Local Authority Having Jurisdictions requirements i.e Reduced pressure backflow preventer(s).

b. Indirect drain receptors.

C. Electrical

1. 480-volt electrical power connections, MCD HET CP766229 100%CD – 03/05/24 23 50 00 – 10 of 12

2. 208-volt normal electrical power connection,

3. 120-volt electrical power connection,

4. Low Voltage and the necessary terminal contacts to various field mounted devices and

Building Automation System (BAS) interfaces as require for a complete function plant.

D. POINTS OF CONNECTION

1. The PCP shall provide each of these service interfaces along the outside face of the

Enclosure. It shall be the installing contractor's responsibility to connect to these interfaces.

2. The PCP shall be factory tested at PCP factory and shipped in sections to the job site and installed by the Owner's installing contractor.

3.2 INSTALLATION

A. Install units’ level and plumb, maintaining manufacturer's recommended clearances. Install according to Manufacture’s design requirements.

B. Unit Support: Install unit level on structural in-beds, Secure units to structural in beds with field welds per manufacture requirements.

3.3 CONNECTIONS BY INSTALLING CONTRACTOR

A. Piping installation requirements are specified in other Division 23 Sections. Drawings indicate general arrangement of piping, fittings, and specialties.

B. Install piping adjacent to PCP to allow service and maintenance.

1. Plumbing exterior drain: Piping spools required for final connection to be provided by the

Manufacturer shall be installed by installing contractor.

C. Electrical System Connections: Comply with applicable requirements in Division 26 Sections for power wiring, switches, and motor controls.

D. Ground equipment according to Division 26 Section "Grounding and Bonding."

3.4 STRUCTURAL STEEL BASE

A. The structural steel base ( enclosure) shall be constructed of hot or cold rolled galvanized steel members sufficient to meet or exceed specified loads. The steel base shall include lifting lugs as required for rigging of entire shipping modules.

B. Structural steel members shall be located to facilitate the mounting of all major equipment.

1. Mounting of this equipment to unsupported deck plate is not permitted.

2. The design of the base shall include the installation of drain receptacles at strategic locations as required for water drainage that may occur during routine maintenance functions on equipment and/or pipe systems or to accommodate any spills or leaks that may occur.

a. All drains shall be piped below the “deck” to a single point indirect waste outside of the perimeter steel and shall be coordinated with the location of the indirect receptor site drain(s) (site drain is by others). The indirect drain shall discharge into the site drain receptor with a 2” air gap or per local code requirements.

b. All locations where non-ferrous metals in the drain piping comes in contact with the galvanized structural elements proper precautions to prevent galvanic corrosion shall be incorporated into the design.

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3.5 WALL FRAME

A. Wall frame shall be constructed of structural steel members sufficient to meet or exceed specified loads. The wall frame shall be a structural “post and beam” design that includes wall panels for weatherproofing the enclosure and as detailed in PART 2.

3.6 ROOF FRAME

A. The roof frame shall be constructed of structural steel members sufficient to meet or exceed specified loads. Roof design shall incorporate roof panels as detailed in PART 2. Waterproofing of roof assembly shall utilize a sloped, high rib, insulated, foam core roof panel to allow for proper drainage. Assembly shall include all flashing, counter flashing and gutters as required to properly weatherproof the enclosure. The roof assembly shall be fabricated to allow for easy removal of the entire roof assembly and shall be mechanically fastened to the wall frame with the use of no more than four connection points between the wall assembly and the roof assembly. The roof assembly shall be designed so that only simple hand tools and no more than 2 people with the assistance of a lifting apparatus (crane, forklift, etc) are required for the removal of roof structure.

3.7 PIPE INSULATION

A. Refer to specification 230700, 230716, and 230719.

3.8 THERMOMETER INSTALLATION

A. Refer to specification 230519.

3.9 PRESSURE GAGE INSTALLATION

A. Refer to specification 230519.

3.10 DOMESTIC WATER PIPING

A. Refer to specification 221000 and 221120.

3.11 HYDRONIC SPECIALTIES INSTALLATION

A. Refer to specification 232126.

3.12 PUMPS

A. Refer to specification 232123.

3.13 FIELD QUALITY CONTROL

A. Manufacturer's Field Service: Engage a factory-authorized service representative to inspect field-assembled components and equipment installation, including connections. Report results in writing.

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B. Perform the following field quality-control tests and inspections and prepare test reports:

1. After installing and after electrical circuitry has been energized, test units for compliance with requirements.

2. Inspect for and remove shipping bolts, blocks, and tie-down straps.

3. Operational Test: After electrical circuitry has been energized, start units to confirm proper motor rotation and unit operation.

4. Test and adjust controls and safeties. Replace damaged and malfunctioning controls and equipment.

C. Remove malfunctioning units, replace with new units, and retest as specified above.

3.14 ADJUSTING

A. Adjust initial temperature and humidity set points.

B. Set field-adjustable switches and circuit-breaker trip ranges as indicated.

END OF SECTION 235000

SECTION 23 73 13 - MODULAR OUTDOOR CENTRAL-STATION AIR HANDLING UNITS 1

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PART 1 GENERAL

1.1 SCOPE

A. This section specifies the furnishing and installation of double wall factory standard air handling units for floor-mounted installation. Units shall be constructed for outdoor installation.

1.2 REFERENCE STANDARDS

A. ARI Standard 210 or 360 (performance rating).

B. ARI Standard 240.

C. UL Listed, labeled in accordance with UL 465/1995 for indoor blower coil units.

1.3 APPLICABLE PROVISIONS

A. Refer to Section 23 05 00, Common Work Result for HVAC.

B. Refer to Section 23 05 29 HVAC Equipment Support.

1.4 SUBMITTALS

A. Submit product data for review, including information required to verify all scheduled capacities are met. Submit sound data on all units, including radiated and discharge sound levels for each unit. Submit fan data at scheduled capacity, at a speed that is 10% higher.

1.5 DELIVERY, HANDLING, AND STORAGE

A. Delivery. Deliver properly packaged in factory-fabricated containers.

B. Handling. Handle carefully to avoid damaging air handling units.

C. Storage. Store in a clean, dry space in original containers. Protect products from weather, damaging fumes, construction debris and traffic.

1.6 WARRANTY

A. One (1) year on all parts B. Three (3) years parts and labor on the variable frequency drive.

PART 2 PRODUCTS

2.1 GENERAL

A. Furnish factory assembled air handling units including coils, condensate drain pan, fan motor, filters, and all appurtenances in a double wall insulated casing that can be applied in either vertical or horizontal configuration.

2.2 CASING

A. Construction. Furnish modular unit fabricated of a separate frame and individually removable panels in all modules; removal of side panels must not affect the structural integrity of each module. Furnish unit with a casing designed and constructed to withstand the static pressures required by the system, but not less than 6 in. static pressure positive nor 4 in. negative.

Fabricate exterior wall panels of minimum 18 gauge G90 galvanized steel. Fabricate interior wall of minimum 20 gauge G90 solid galvanized steel. Furnish wall panels that are 2 in. thick.

B. Each unit shall be constructed for outdoor installation.

C. Base rail. Furnish unit fully assembled (within shipping limitations) on a minimum 10 gauge G90 galvanized steel base rail that is 5 in. high on units with a coil face area up to 40 square feet & 8 in. high on units with a coil face area larger than 40 square feet.

D. Drain pan. Furnish unit with insulated, double wall, minimum 16 gauge, 316 stainless steel drain pan under cooling coil section. Furnish with drain connections on both sides of unit.

1. Furnish a water level detection device, such as a float switch, in the drain pan that will shut down the unit if the primary drain line becomes blocked.

SECTION 23 73 13 - MODULAR OUTDOOR CENTRAL-STATION AIR HANDLING UNITS 2

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E. Seals. Seal all panel and access door perimeters with closed-cell foam gasketing.

F. Access doors. Furnish unit with full size, hinged, gasketed, removable, double wall access doors with two-step safety handles. Furnish access doors on both sides of each access section and each fan section.

G. View windows. Furnish a minimum 8 in. x 10 in. view window in each access door in the fan section or each access section downstream of a cooling coil.

H. Insulation. Internally insulate unit casing and access doors with 2 in. thick, 1½ pcf glass fiber insulation. Minimum resistance shall be R-13. Cover all exposed surfaces such as channels, angles, braces, etc. (which are in contact with exterior surfaces) with insulation to prevent exterior condensation; install insulation in such a manner that it will not be disturbed if panels are removed. Secure insulation to casing surface and framework with both adhesive and mechanical fasteners on approximately 24 in. centers. Capture all insulation edges within the double wall panels so that there are no raw insulation edges in the airstream.

I. Light and convenience outlet. Furnish a light and a convenience outlet in any fan section or access section downstream of the cooling coil.

2.3 WATER COILS

A. Furnish copper tube coils with aluminum plate fins with up to 10 fins per inch. Use either ½ in.

or 5/8 in. OD seamless copper tubing. Use minimum 0.020 in. wall thickness tubes and 0.008

in. thick fins.

B. Fabricate headers of heavy wall copper with standard threaded MPT copper connections. Locate coil inlet and outlet headers at the same end. Clearly mark inlet and outlet as such.

C. Enclose all coils in a coil module; do not expose headers and U-bends. Fabricate unit such that coils are removable from the section without affecting the structural integrity of the module.

Furnish coils with intermediate tube sheets spaced no more than 4 ft. apart.

D. Make coils gravity drainable without requiring the use of compressed air.

E. Furnish coils with integral vent and drain connections, plugged.

F. Arrange cooling coils for water flow counter to airflow, with bottom inlet connection.

G. Certify all coil capacities, pressure drops, and selection procedure in accordance with ARI 410.

H. Limit water pressure drop to no more than 15 ft. Select water coils for 5 fps maximum velocity, 3 fps minimum velocity.

I. Test coils at minimum 300 psig, leak test underwater at 200 psig.

J. Provide drain pan with size adequate to hold quantity of water required for 100% outside air conditions specified.

2.4 ELECTRIC HEAT

A. Furnish electric heating section of the duct type and capacity scheduled on the drawings. Use only 80 percent nickel, 20 percent chromium, type A resistence wire. Type C alloys containing iron or other alloys are not acceptable. Machine crimp coils into stainless steel terminals extending at least i inch into the airstream and use only stainless steel terminal hardware.

Support coils with ceramic bushings stacked into supporting brackets.

B. Bushings. Recess ceramic bushings into embossed openings and stake them into supporting brackets spaced 3-1/2 inches maximum center to center.

C. UL Listing. Furnish only heaters listed by the Underwriters' Laboratories for Zero Clearance to combustible surfaces and for use with central air conditioners. Heaters must conform to all requirements of the National Electric Code.

D. Primary Protection. For secondary protection, furnish a disk-type automatic reset thermal cutout.

For pilot duty only.

E. Secondary Protection. For secondary protection, wire load-carrying manual reset thermal cutouts in series with each heater circuit. Use cutouts rated at 480 volts minimum.

F. Feeder. Furnish the voltage, phase and number of heating stages as listed in the schedule.

Three-phase heaters to have single-phase circuits for operation from a 3-phase, 4-wire power source. Circuits to be rated at 48 amperes maximum. Furnish one set of line terminals to feed all circuits. Test heater dielectrically at 2000 volts before shipment. Size field-installed conductors feeding the heater for 125 percent of the connected load.

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G. Built-in Features. Factory wire built-in components to terminal blocks for field connection.

Insulate all internal wiring 105 C. Disconnect all ungrounded conductors to each circuit with built-in magnetic contactors. Furnish heaters with an air flow switch which will not allow heaters to energize without proof of air flow. Furnish dry industrial type built-in transformer sized to carry full contactor holding coil load. Fuse primary windings at the factory. Factory install heater overcurrent protection per NEC 424-22(b), and (c). Furnish overcurrent protection of the UL Class RK-5, time-delay, current-limiting type with rejection features. Furnish fuseclips for the fuses with rejection features per UL Class R requirements. Furnish built-in unfused disconnect switch that is snap action, industrial type with door interlock mechanism to prevent hinged terminal box cover from being opened when the switch is on. Insulated terminal box to have 1/4-inch asbestos millboard or approved equal sandwiched between two pieces of sheet metal.

2.5 FAN MODULE

A. Fan. Furnish module with double inlet, double width, airfoil (or if unavailable for that size, forward curved), centrifugal-type fan with adjustable belt drive. Furnish fan shafts which are solid, turned and polished, with fan wheel keyed to shaft. Design shaft not to exceed 75% of its first critical speed at any catalogued speed. Furnish fan bearings on both ends of fan shaft (cantilevered wheels are not acceptable); bearings to be self-aligning, grease lubricated, ball bearings, 200,000

hr. L-50 life, with remote lube lines extended to the accessible side of the unit near the access door.

B. Drive.

1. (V-belt drives with standard motors) Furnish a motor driven V-belt drive, designed for not less than 150% of maximum catalogued motor horsepower. Furnish an adjustable pitch motor sheave, selected to produce the specified capacity when set approximately at the midpoint, and to produce not less than 20% variation in speed from full open to full closed.

Non-adjustable motor sheaves may be used for motors larger than 15 horsepower; replace sheave if necessary at time of final balancing as part of the work of this contract. For units of nominal face area of 35 sq. ft. or larger, furnish a removable OSHA belt guard with a hole over the tachometer groove, sized for the maximum drive size applicable for the unit.

2. (V-belt Drives with Variable Frequency drives)Furnish a motor driven V-belt drive, designed for not less than 150% of maximum catalogued motor horsepower. Furnish an fixed pitch motor sheave, selected to produce the specified capacity when the motor is running at its nominal speed. For units of nominal face area of 35 sq. ft.