36C10D25Q0020 0002.docx

5. PROJECT NUMBER (if applicable)

CODE

7. ADMINISTERED BY

2. AMENDMENT/MODIFICATION NUMBER

CODE

6. ISSUED BY

8. NAME AND ADDRESS OF CONTRACTOR

4. REQUISITION/PURCHASE REQ. NUMBER

3. EFFECTIVE DATE

9A. AMENDMENT OF SOLICITATION NUMBER

9B. DATED

PAGE OF PAGES

10A. MODIFICATION OF CONTRACT/ORDER NUMBER

10B. DATED

BPA NO.

1. CONTRACT ID CODE

FACILITY CODE

CODE

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:

The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offers

E. IMPORTANT:

is extended,

(a) By completing Items 8 and 15, and returning __________ copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted; or (c) By separate letter or electronic communication 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 is not extended.

12. ACCOUNTING AND APPROPRIATION DATA

(REV. 11/2016)

is required to sign this document and return ___________ copies to the issuing office.

is not, 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.

15C. DATE SIGNED

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(b).

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 letter or electronic communication, provided each letter or electronic communication makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

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

D. OTHER

Contractor

16C. DATE SIGNED

14. DESCRIPTION OF AMENDMENT/MODIFICATION

16B. UNITED STATES OF AMERICA

Except as provided herein, all terms and conditions of the document referenced in Item 9A or 10A, as heretofore changed, remains unchanged and in full force and effect.

15A. NAME AND TITLE OF SIGNER

16A. NAME AND TITLE OF CONTRACTING OFFICER

15B. CONTRACTOR/OFFEROR

STANDARD FORM 30

PREVIOUS EDITION NOT USABLE

Prescribed by GSA - FAR (48 CFR) 53.243 (Type or print) (Type or print) (Organized by UCF section headings, including solicitation/contract subject matter where feasible.)

(Number, street, county, State and ZIP Code) (If other than Item 6) (Specify type of modification and authority) (such as changes in paying office, appropriation date, etc.)

(If required)

(SEE ITEM 11)

(SEE ITEM 13)

(X)

CHECK

ONE

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

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

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

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

VA

12-04-2024 00101 Department of Veterans Affairs Veterans Benefits Administration Acquisition Directorate 1800 G Street NW Washington

DC

20006 00101 Department of Veterans Affairs Veterans Benefits Administration Acquisition Directorate 1800 G Street NW Washington

DC

20006 To all Offerors/Bidders

36C10D25Q0020 11-14-2024

X X X X

The purpose of this Amendment is to incorporate VBA's responses to the Request for Information (RFI) received.

See attached RFIs and their responses Set #1.

The submission due date remains unchanged.

Tiffany Garfield Solicitation 36C10D25Q0020 Replace Chiller at VBA Montgomery Regional Office Questions and Answers Set #1 12-4-2024

1. What is the setpoint or setpoint range the chiller will need to supply cold fluid at? 44 Degree supply

2. It is mentioned as 187 tons, but what is needed in terms of BTU/hr at the lowest used setpoint? The tonnage is based on the building design, the unit is designed to fluctuate based on the demand. Can not provide an answer that detailed as the system operates based on chilled water supply temp. One day it may need 150 tons of cooling the next only 40. Outside air temp also plays a role to as to when the unit will actually run or not.

3. What are the climate conditions at the site, ie high/low worst case ambient temps? Geographic location? Elevation? Hot and humid summers 95 degrees plus, mild to cold winters mid to low teens at times. Middle of the state land locked. Elevation is approximately 220 feet above sea level.

4. For PLC communications, we can supply MODBUS TCP/IP and if needed we can offer BAC-NET as well, what would be the preference. The preference is to maintain Metasys controls through-out the operational circuit. We do not want a hodge podge of circuity controls to maintain the climate control system.

5. The SOW has the requirement to perform a “pressure and vacuum test”.

This is very unusual requirement for and air-cooled chiller and will add cost to the project.

Is this a firm requirement? This would only be required if the system does not come factory charged.

6. The SOW has the requirement to “Conduct a partial drain and treat the chilled water system with a dyed glycol solution to prolong system operation. Refill chilled water system to capacity and return to service. “ Is the intent of this statement to perform a leak check for the entire chilled water system? No, there are no indications of the system leaking.

What percentage of glycol is required? 10% of approximately 4200 gallon system capacity Does the 187-ton chiller rating account for the glycol derating? Yes

7. The SOW has the requirement to “Charge new unit with factory recommended refrigerant.”

It is very unusual for an air-cooled chiller to be shipped without the refrigerant installed and will add cost to the project. Only if it does not come pre-charged.

Is this a firm requirement? Only if it does not come pre-charged.

8. The SOW has the requirement to “perform vibration analysis on new chiller”.

This is very unusual requirement for and air-cooled chiller and will add cost to the project. If there is factory provided vibration analysis, that will satisfy this requirement. Air cooled units are notorious for having vibration issues that cause mechanical piping failures that create catastrophic refrigerant losses and create unnecessary repairs.

Is this a firm requirement.

9. Please confirm this is the correct name plate data. Yes

10. Confirm that the 187-ton chiller is the nominal tonnage and the chiller to be provided will be selected for the power and pipe size of the existing chiller or is the power feed to be changed based on chiller tonnage. Please provide the type of compressors and refrigerant type, screw or scroll, etc. Yes, the tonnage is nominal. Refrigerant type would be factory recommended. Screw compressors.

11. Please provide photos of the existing chiller name plate with: See question #9

a. Manufacturer and Model No.

b. Serial No.

c. Power, voltage, amperage, etc

d. MOP for power feed disconnect.

12. Please provide a photo of the disconnecting means for the chiller. ie, is the chiller provided with a Circuit Breaker or Disconnecting means?

Is the chiller powered from an existing field disconnect or MCC at the site? Field disconnect fed from main switch board

13. Please provide Chiller flow rate and pipe size. 350 GPM with 6” piping.

14. Please provide thickness and type of insulation for new pipe. 1” foam rubber

15. Please provide specifics that the proprietary BAS Vendor is to add or make changes to the existing JCI BAS System. No changes are requested to be made to the BAS system

16. Please provide a Google Earth shot of location or photo to show service area for a crane to remove and replace chiller. Location 1 would require a larger crane to do the lift up and over the building. Location 2 requires the removal of a 40-50 foot cypress tree to have a straight line to the chiller pad up and over the building. Location 2 is a shorter lift.

17. Please provide if the glycol is ethylene or propylene and the concentration for this system. Provide the dye color of glycol to be added. Propylene, green

18. Please provide a photo of piping isolation valves for the draining of the glycol. The system has a treatment station installed inside the pump room.

19. Is this AN EQUAL Solicitation or is this a proprietary solicitation? Equal that meets the specifications in the SOW.

20. Please designate the location for the temporary chiller. Where is the temporary chiller to be powered from? Temp chiller to be located outside of chiller pad and fed from the current disconnect.

21. What type of chiller do they want to replace it with, Variable speed compressors or standard compressors? Variable Speed

22. Existing Chiller is 175Ton Scroll Compressor. In the SOW it states 187Ton, Customer stated wanted to keep close to 175Ton. What is the preferred tonnage of new chiller? Research has found that the current chiller tonnage is no longer available from the current manufacturer, so therefore the facility selected the next higher unit size that did not require changing of additional components such as piping, disconnects, and or pumps.

23. Does the disconnect need to be replaced? No

24. Screw or Scroll compressor? Screw

25. Can crane lifts and work be performed on weekends or after hours? Currently all work is planned for normal business hours Monday – Friday 8:00 am to 4:30 pm CST.

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