Amendment 0001 7390531.pdf

NAVFAC

SPECIFICATION

7390531 Replace Chiller B4335

MCAS Cherry Point, NC

AMENDMENT #0001

IMPORTANT

This amendment should be acknowledged when your proposal is submitted. Failure to acknowledge the amendment may constitute grounds for rejection of the proposal.

If your proposal has been submitted prior to the receipt of this amendment, acknowledgement should be made by telegram, which should state whether the price contained in your proposal is to remain unchanged, is to be decreased by an amount, or is to be increased by an amount. The acknowledgement must be received prior to proposal opening time.

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT 1. CONTRACT ID CODE PAGE OF PAGES

1 2

2. AMENDMENT/MODIFICATION NO. 3. EFFECTIVE DATE 4. REQUISITION/PURCHASE REQ. NO. 5. PROJECT NO. (If applicable)

0001 9/4/2025 7390531

6. ISSUED BY Code N40085 7. ADMINISTERED BY (If other than item 6.) Code

FEAD CHERRY POINT

PSC BOX 8006

CHERRY POINT, NC 28533

8. NAME AND ADDRESS OF CONTRACTOR (No., street, county, State and ZIP Code) 9A. AMENDMENT OF SOLICITATION

Replace Chiller B4335

9B. DATED (SEE ITEM 11)

AMENDMENT MUST BE ACKNOWLEDGED WITH YOUR PROPOSAL 10A. MODIFICATION OF CONTRACT/ORDER NO.

10B. DATED (SEE ITEM 13)

CODE FACILITY CODE

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

The above numbered solicitation is amended as set forth in item 14. The hour and date specified for receipt of Offers is extended is not extended. Offers must acknowledge receipt of this amendment prior to the hour and date specified in the solicitation or as amended, by one of the following methods: (a) By completing items 8 and 15, and returning 1 copy of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted; or (c) By separate letter or telegram which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGMENT TO BE RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN REJECTION OF YOUR OFFER. If by virtue of this amendment you desire to change an offer already submitted, such change may be made by telegram or letter, provided each telegram or letter makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

12. ACCOUNTING AND APPROPRIATION DATA (if required)

13. THIS ITEM APPLIES ONLY TO MODIFICATIONS OF CONTRACTS/ORDERS,

IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.

A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN ITEM 14. ARE MADE IN THE

CONTRACT ORDER NO. IN ITEM 10A.

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATION CHANGES (such as changes in paying office, appropriation date, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103 (b).

C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:

D. OTHER: (specify type of modification and authority)

E. IMPORTANT: Contractor is not is required to sign this document and return original to the issuing office.

14. DESCRIPTION OF AMENDMENT/MODIFICATION (Organized by UCF section headings, including solicitation/contract subject matter where feasible.)

7390531 Replace Chiller B4335, Marine Corps Air Station Cherry Point, NC

Amendment 0001 is being issued to answer pre-award RFI’s.

The deadline to submit pre-award RFI’s HAS PASSED.

The proposal due date of 09 September 2025 at 3:00 PM local time REMAINS unchanged.

See Attached.

15A. NAME AND TITLE OF SIGNER (Type or print) 16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print)

15B. CONTRACTOR/OFFEROR (Same as Item 8) 15C. DATE SIGNED 16B. UNITED STATES OF AMERICA 16C. DATE SIGNED

BY

(Signature of person authorized to sign) (Signature of Contracting Officer)

NSN 7540-01-152-8070 30-105 STANDARD FORM 30 (REV.1-83) 0224-3(10-90)

PREVIOUS EDITION UNUSABLE Prescribed by GSA

Amendment 0001 7390531 Replace Chiller B4335

RFI Responses:

1. Can design conditions be provided for the chillers? (i.e. GPM, EWT, LWT, Voltage/Phase)

Response: Please see attached documentation for chiller specs.

2. The existing chiller looks to be an air cooled screw chiller. Can an air cooled scroll be provided if design conditions are met?

Response: The original chiller was an air cooled screw chiller. Yes, replace with a like in kind air cooled scroll chiller.

3. Sheet M-702 indicates that the existing digital control system will manage lead/lag control of the 2 new chillers. Simultaneously, it specifies that the new chillers will use their integral controllers to manage lead/lag control of the 3 new pumps. This dual-control approach introduces a risk of conflicting logic and operational inefficiencies. To ensure optimal performance and maintainability, we recommend implementing a single chiller plant management system that oversees the entire lead/lag sequence of operation for the chillers, pumps, and control valves. Please clarify the design intent for the chiller plant control system.

Response: The scope of work specifies a like-in-kind replacement of one (1) chiller unit and does not specify digital/integral controls outside of tying the new unit back into our BAS (Metasys).

4. What are the warranty requirement for the air cooled chillers?

Response: The typical standard for warranties is that the contractor is responsible for any service or repairs related to the work completed in the scope of work for up to 1 year after the work is complete.

Unit Overview

Chiller Model Ascend (TM) Air-Cooled Chiller Model ACS

Unit Nominal Tonnage 160 Nominal Tons

Refrigeration Capacity 145.6 tons

Cooling Efficiency 10.32 EER (Btu/W-h)

IPLV.IP 16.09 EER (Btu/W-h)

NPLV.IP 16.36 EER (Btu/W-h)

Voltage 460V/60Hz/3Phase

Refrigerant Refrigerant Charge R-454B

Elevation 0.00 ft

Agency Listing UL Listed to U.S./Canadian Safety Std

Model Number ACSA1602EUA*XEXLXNB2XLNL

SCEX1TAUBXXAA1XXXXONX

Evaporator Information Evaporator Application Standard Cooling (Above 40 Deg F)

Fouling Factor 0.000100 hr-sq ft-deg F/ Btu

Flow Sense Set Point Flow Switch Set Point 60

Design Flow 249.0 gpm

Evaporator Head Loss 5.41 ft H2O

Strainer Head Loss 2.77 ft

VPF Min Flow 205.1 gpm

Fluid Properties

Fluid Type Water

Fluid Freeze Point 32.00 F

Entering Temperature 58.00 F

Leaving Temperature 44.00 F

Condenser Information Unit Application Low Ambient

Condenser Fin Options Coated Long Life Alloy Aluminum Coil

Number of Fans 8

Temperatures

Ambient Air Temp. 95.00 F

Saturated Cond - ckt 1 125.88 F

Saturated Cond - ckt 2 125.88 F

Electrical Information Unit Voltage 460V/60Hz/3Phase

Total Power 169.3 kW

Compressor Starter Across-The-Line-Starter

Incoming Line Connection Single Point Unit Power Connection

Incoming Line Connection Type Terminal Block

Short Circuit Current Rating Default Short Circuit Rating

FLA - Condenser Fan (each) 2.50 A

MCA

Single Point Power 317 A

MOP

Single Point Power 400. A

RLA

Compressor 1A 69.00 A

Compressor 1B 69.00 A

Compressor 2A 69.00 A

Compressor 2B 69.00 A

LRA

Compressor 1A X-L LRA 389.00 A

Compressor 1B X-L LRA 389.00 A

Compressor 2A X-L LRA 389.00 A

Compressor 2B X-L LRA 389.00 A

Physical Information

Dimensions

Length 232 in

Width 88 in

Height 98 in

Weights

Operating 7897 lb

Shipping 7754 lb

Charge Circuit 1 Circuit 2

Refrigerant 54.0 lb 54.0 lb

Oil 3.20 gal 3.20 gal

Acoustical Performance Unit Sound Level Standard Noise

Sound Power Levels (Lw, in dB, ref1 pW)

Percent Load

Octave Band Center Frequency (Hz) Overall A-Wtd63 125 250 500 1000 2000 4000 8000

Standard full and part-load rating conditions per AHRI 550/590

Job Name: Chiller Replacement Building

Unit Tag: C-1

Prepared For: Quantity: 1

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Sound Pressure Levels (Lw, in dB, ref1 pW) 10m from center of broad sides of chiller

Percent Load

Octave Band Center Frequency (Hz) Overall A-Wtd63 125 250 500 1000 2000 4000 8000

Standard full and part-load rating conditions per AHRI 550/590

Standard Rating Performance and Information for LEED Rating Refrigerant Charge - ckt 1 54.0 lb

Refrigerant Charge - ckt 2 54.0 lb

Rated Refrigerating Capacity 143.6 tons

Rated Cooling Efficiency 10.23 EER (Btu/W-h)

Rated IPLV 16.09 EER (Btu/W-h)

Refrigerating Capacity 145.6 tons

Cooling Efficiency 10.32 EER (Btu/W-h)

Compressor Power 158.9 kW

Fan Motor Power 10.46 kW

This product meets the minimum efficiency requirements of ASHRAE Standard 90.1 and CANS/CSA C743 for all versions (which are based on AHRI standard rating conditions with water) and, therefore, also meets the LEED "Minimum Energy Performance" prerequisite in the Energy and Atmohphere section.

The LEED Green Building Rating System™, developed by the U.S. Green Building Council, provides indepenent, third-party verification that a building project meets green building and performance measures

Certified in accordance with the AHRI Air-Cooled Water-Chilling Packages Certification Program, which is based on AHRI Standard 550/590 (I-P) and AHRI Standard 551/591 (SI). Certified units may be found in the AHRI Directory at www.ahridirectory.org.

Trane Select Assist Version Number: 290.

Data Generation Date: 1/2/2025

Job Name: Chiller Replacement Building

Unit Tag: C-1

Prepared For: Quantity: 1

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