36C25723B0009 0003.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 NUMBERE

D 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 amendmen t, 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) 11-01-2022 549A4-20-700 Department of Veterans Affairs Network Contracting Office 17, NCO17 1901 Veterans Memorial Dr. Building #171 Temple TX 76504 Department of Veterans Affairs Network Contracting Office 17, NCO17 1901 Veterans Memorial Dr. Building 171 Temple TX 76504 To all Offerors/Bidders

36C25723B0009

X X X

Amendment 0003 is issued to provide the Consolidated RFIs with responses.

Joyce M. Mills Contracting Officer

1. 23 64 00 3.2-B makes reference to installing a refrigerant monitor however one is not depicted on the plans, and material description for the refrigerant monitor is not outlined in the specification. Is a new one required or should the existing monitor be reused?

A: Confirm VA response to RFI 03/16/21 to include Refrigeration Machinery Room Detection and Ventilation System Design and Specification.

RE: 2021 IMC Section 11

1104.2 Machinery Room: Machinery Room is required as amount of refrigerant exceeds allowable amount of refrigerant per stipulated volume of occupied space.

A. RE: Spec Section 236400 Part 3 – Execution, Paragraph 3.2 Equipment Installation; Sub-paragraph B: Retrofit existing refrigerant detection system to detect R-134b. Provide annunciation, notification, and interlocks per sequence. Field Verify.

B. Alternate: Provide and Install new Refrigerant Detection System. RE: Figure 1 Below.

(Macurco RD-12 Gas Detector, Line Voltage with Detection and Ventilation Control Panel; R-134a Detectors QTY(6); Horn/Strobe Kit, QTY(4), Amber; 24VDC Power Supply, Sync Module, Sync Module Relay (3rd Party) or Equivalent) Background Information:

A. RE: 2021 IMC Section 11

1) RE: Section 1103 Refrigeration System Classification, Table 1103.1 Refrigerant Classification, Amount and OEL: R-134a A1 13 Pounds per 1000 CUFT 50,000 PPM, 210 g/m3, 1,000, 2-0-0b

2) RE: Section 1103.2 Occupancy Classification: Institutional Occupancy

3) RE: Section 1103.3 System Classification, 1103.3.1 Low Probability Systems

4) RE: Section 1105.3 Refrigerant Detector shall be provided per Sections 608.9, 608.18 of International Fire Code B. RE: IFC 608.9 Refrigeration Detection Machinery room shall be provided with refrigerant detector with an audible alarm and visible alarm and shall comply with Section 608.9.1.

C. 608.9.1 Refrigerants other than Ammonia

1) A Detector or sampling tube, draw air to detector from approved location where refrigerant leak to expected to accumulate. System shall initiate audible and visible alarms inside of and outside of each entrance to the refrigerating machinery room and transmit a signal to an approved location where the concentration of refrigerant detected exceeds the lesser of the following:

2) TLV-TWA values shown in the IMC for the refrigerant classification

3) Twenty-Five Percent of the lower flame limit

4) Detection exceeding the upper detection limit or 25% of the lower limit shall stop refrigerant equipment in accordance with 608.10 Remote Controls

a) Interlock to operate with emergency exhaust fan

Figure 1 - VABM Chiller Room Detector / Horn Strobe Locations

2. Is the project sales tax exempt and will the Government provide a sales tax exemption certificate?

A: The Tax Exempt Form will be provide to the awardee upon request.

3. 23 05 11 1.7-C.1 makes reference to as-builts in AutoCAD as well as lockout tagout locations in AutoCAD. Please confirm as-builts in AutoCAD are required. As-builts in AutoCAD are not described in 01 00 00 1.14 “As-Built Drawings".

A: Not necessary. Contractor is responsible for providing redlines during construction. Format does not require use of AutoCAD. Final AutoCAD As-Built are responsibility of design engineer.

4. Please confirm extensive photographic documentation and filing as described in 01 00 00 1.31 is required on this project. A firm like Multivista would have to provide this requirement.

A: Photographic documentation can be achieved by Superintendent so long as it is associated with daily reports and captures evidence of installation progress. And all photos must be provided on CD and submitted with project closeout documents.

5. Confirm a dedicated SSHO is required per 01 35 26 1.7-C. Per specification this individual must be separate from the Project Superintendent and on-site at all times.

A: The General Contractor shall have a Competent Supervisory Person on site at all times when any worker(s) or subcontractor(s) are present. The General Contractor is also required to maintain on site a competent Site Safety and Health Officer per 01 35 26 Safety Requirements when any worker(s) or subcontractor(s) are present. The VA COR may WILL, at his or her discretion, allow the Competent Supervisory Person to also act as the SSHO, based on demonstrated competency and performance in the two roles. If demonstrated lack of competency or effectiveness in either role is observed, the VA COR may revoke the privilege.

6.Are special inspections per 01 45 29 required for concrete housekeeping pads? Is the inspector to be hired by the Contractor.

A: Not Necessary.

7. 23 05 93 makes reference to vibration and sound testing (in addition to TAB). Please confirm sound and vibration testing on-site are required.

A: RE: Specification Section 230593 Testing Adjusting and Balancing for HVAC Part 3 Execution Subparagraph 3.8 Vibration Testing, Subparagraph 3.9 Sound Testing: As specified, Vibration Testing and Sound Testing are required. However, provide Deductive Alternate if subcontractor is able to demonstrate compliance with Vibration and Sound Level criteria without the use of deliberate testing.

8.How many chilled water pumps can be down at one time in order to install the new pumps?

A: One (1).

9. Confirm coordination/shop drawings as described in 23 05 11 1.4-H are required.

A: RE: Sheet M-001, Section 230511 Common Work Results For HVAC; Part 1 General, Paragraph 1.4 H: Yes. Coordination Shop Drawings to a level that address multi-discipline coordination and include equipment locations, service clearance footprints, pipe main, pipe branch main routes, ductwork offsets, clearances, valve locations, as it relates to potential conflicts, offsets, interferences, etc. are required as submittals for the project.

10. Building specification was not included. Is the Contractor to assume the new refrigerant vent piping off the chiller will use the existing vent penetration?

A: RE: Sheets M-101, M-102, M-501 - Diagram 1 will be revised, and sheets re-issued during the pre-construction phase of the project.

A. Sheet M-101: Disconnect and remove existing refrigerant pipe from CH-3 to roof penetration as indicated. Penetration shall be re-used. RE: Sheet M102. Disconnection shall accommodate new pipe connection. Field Verify.

B. Sheet M-102: Size and route new CH-3 Refrigerant Relief Valve to location of existing CH-3 Refrigerant Relief Penetration as indicated. Field Verify.

C. Sheet M-501 Diagram 1: Note #2 shall be revised to clarify field verify re-use of existing penetration.

11. The drawings do not indicate where 120V for the control valves are to be supplied from. Please advise.

A: RE: Sheet E-101, E-102: Provide and install new branch circuits to new equipment. Connect to existing branch distribution panels (Square D, Westinghouse, General Electric). Field Verify.

12. The specs call to match existing manufacturer. Can you provide manufacturer for the disconnect and existing panels?

A:

A. The existing distribution system equipment includes the makes and models of several manufacturers including Square D, Westinghouse, General Electric, Schneider Electric. It is the intent for the new Chiller, Chilled Water Pumps to be connected to the existing Main Distribution Panel, Motor Control Center. Field Verify.

B. RE: Sheet E-101, E102: Connect new Chiller to existing equipment distribution panel (Westinghouse). Provide and install new MCC Bucket (Westinghouse) sized per manufacturer’s recommendations to operate with VFD. Route circuit from new MCC Chilled Water Bucket and connect to new VFD and associated pump. Field Verify new equipment locations and routings. RE: Comments #21, #47 above.

C. RE: Sheet E-101, E-102: Provide and install new branch circuits to new equipment. Connect to existing branch distribution panels (Square D, Westinghouse, General Electric). Field Verify.

13. Do existing chill water pump isolation valves provide adequate isolation to allow pump and piping replacement? If not, will an extended chilled water outage be considered?

A: we do not think they will hold, plant operator said they are very old 14.Does existing chiller #3 have header isolation valves with flanged connections? If not, will an extended chilled water outage be considered?

A: Extended chilled water outage WILL NOT BE considered.

15. Please confirm that the existing ventilation duct will have to be removed and replaced to remove the old chiller and install the new chiller.

A: RE: Sheet M-101, M-102: While not specifically included/excluded, removing/replacing ductwork and/or any other system is a reasonable approach to facilitate the removal of the existing chiller and installation of the new chiller.

The temporary modification of any system to facilitate construction shall be coordinated with all disciplines and submittal for approval prior to work being performed. The intent is to make reasonable, temporary modifications to existing systems as required to accommodate the delivery and installation of the chiller equipment, physically and dimensionally.

16. We have coordinated with the manufacturer of the chiller and the chilled water pumps shown onsheet M-601 of the drawings. THE LEAD TIME AFTER SUBMITTAL APPROVAL AND PURCHASE ORDER (WHICH WILL TAKE APPROXIMATELY 5 WEEKS OR APPROXIMATELY 35 DAYS) IS APPROXIMATELY 25 WEEKS OR 175 DAYS. This is a total of approximately 30 weeks or 210 days just for the equipment to arrive on site.

Will the Government consider issuing 2 Notices to Proceed (NTPs) – an Admin NTP of 30 weeks (210 days) to allow for procurement of the chiller and chilled water pumps and a Technical NTP of 34 weeks (approximately 240 days) to complete the physical portion of the work?

A: No; however, project duration WILL BE changed to 365 days from NTP.

17. Are we to dispose/abate of any asbestos, lead, mold, or other hazardous material as part of this project? If so, provide appropriate hazardous material site survey report.

A: There is no known hazardous abatement required in this project.

18. What will the ICRA level be for this project?

20.For controls related work, is there a specific proprietary firm that must be used such as Siemens, JCI, etc. or is the successful offeror able to use any firm it wants.

A: See Q&A #19.

21.Will all work associated with this project able to be performed during regular working hours?

A: No. Normal construction work hours are 7:30 AM to 4:30 PM Monday through Friday.

All building systems shall be maintained in full operation at all times. Request utility system shutdowns in writing not less than 21 calendar days in advance and scheduled with the COR at times least impacting patient care. Shutdown work shall be during low patient times and performed on weekends between 6AM Saturday and conclude by 6 PM Sunday.

Question under 21Regarding the refrigerant monitor for Chiller 3; it was discussed during site visit to reuse the existing monitor. However, the existing monitor uses R-22 refrigerant, the new chiller refrigerant is R134A. Can we please have clarification?

A: Please see response to Comment #1 above.

22.Will the successful offeror be required to provide temporary chillers during Chiller 3 piping modifications?

A: Only if contractor insists on replacing chillers at a time of year where Chiller 3 is needed to support station operations.

23. There are NO isolation valves located at the main headers per M-101 Note 1. Is the successful offeror expected to conduct a line freeze and install isolation valves?

A: Acknowledged. No. Line freezing, while not specifically excluded, is not the intention. Please see below:

A. Mobilize 800 Ton Temporary Chilled Water Plant (Min Duration 56 Days)

1. Provide and install two (2) truck mounted air-cooled chillers complete with primary chiller pump(s) and separate secondary chilled water pumps; hoses, valves, specialties, controls, etc. RE: Figure 2 Below.

2. Provide two (2) separate 480V/3PH, 1000A Feeds; connect to existing campus electrical system and route to a 1000A equipment feeder to each dedicated Chiller Distribution Panel; terminate. Field Verify connection and routing.

3. Connect Plant to existing chilled temporary chilled water loop valved connections; bring temporary plant online

4. Switchover to Temporary Chilled Water Plant B. Install Chiller Plant Header Isolation Valves

1. Shutdown Chilled Water Central Plant; isolate all equipment.

2. Provide and Install Chilled Water Pipe Header Isolation Valves

3. Drain chilled water header and piping leading to CH-3, Chilled Water Pumps (CHP-1,2,3,4)

4. Provide and Install new isolation valves:

a. CH-3, (4) Valves

b. Chilled Water Pumps, (8) Valves

c. Alternate 001: By-Pass Valve, (2) Valves

d. Alternate 002: CH-1, (4) Valves

e. Alternate 003: CH-2, (4) Valves

f. Alternate 004: Condenser Water Header Pumps, (8) Valves

g. Reconnect pipe to all equipment

h. Fill System C. Switchover to Chiller Plant

1. Open isolation valves for all isolated equipment

2. Start-Up Chilled Water Plant

3. Switchover to Chilled Water Plant D. De-Mobilize Temporary Chiller Plant

1. Shutdown Temporary Chilled Water Plant

2. Disconnect Power and remove feeders

3. Disconnect hoses from chilled water piping, remove temporary hoses, valves, specialties, etc.

4. De-Mobilize E. Rotate new Chilled Water Plant Equipment

1. Perform Electrical Rough-In

a. Set new electrical and controls equipment

b. Provide and Install Electrical Rough-In

2. Isolate equipment to be replaced; close isolation valves, de-energize power, disconnect power

3. Remove and Replace equipment

4. Terminate Electrical / Control connections

5. Perform Equipment Start-Up

6. Bring online

7. Repeat for each piece of equipment to be replaced

Figure 2 - Chilled Water Plant Flow Diagram

Figure 3 - Temporary Chiller Trailer 24.M-101 Note 2 calls to demo piping up to the valves. However, it does NOT specify the need for new valves. Should the contractor price replacing these valves?

A: Yes – these butterfly valves have never been exercised, don’t think they will hold - this was discussed during the site visit, and I believe determined to replace the valves, but drawings do NOT reflect it. Drawings page likely needs revised to include valve replacement & Detail, notes, etc. And if we are replacing how will it be achieved? Best to Note: complete over weekend in cool months with <8 hour outage; however, if pumps become available in summer, then we need to freeze opipes rather than an outage – so is it a safer proposal to NOTE this work to be completed by freezing??? AE to advise…

25. If the previous valves are to be replaced, provide technical details on the valves required.

A: RE: Specification 232113 Hydronic Piping, Part 1 Products, Paragraph 2.8 Valves; Sup-paragraph D. Shut-Off Valves.

26. Must the 4” concrete housekeeping pad be replaced? During the site visit VA reps stated they would like to keep the existing pad, and just resurface the existing pad with epoxy coating to provide a “clean” appearance. Is this what the Government wants?

A: RE: Sheet M-101, Keynote 3: The intent is for CH-3 to be set on a pad with dimensions that extend beyond the footprint of the base of the equipment, elevated from the finished floor to facilitate cleaning the floor in and around the base of the equipment as well as to present a finished aesthetic. Provide new equipment pad or re-use existing as required. Submit for Approval.

27. If the Government does want an epoxy coating applied to the existing pad, provide technical details on what is required.

A: Epoxy Finishes is excluded from the project currently. Upon direction, a finish specification will be incorporated into the project with appropriate contract modification.

28. What are the new locations for the new VFD’s? (Locations shown on the drawings are for the condenser water pumps).

A: RE: Sheet M-101: Acknowledged. Note Callout will be revised, and sheet re-issued during the pre-construction phase of the project to indicate the VFD locations as noted are Condenser Water Pump / Cooling Tower Fan VFD’s.

A. RE: Sheet E-101/102. Acknowledged. Keynote 2 / Keynote 3 will be revised, and sheet re-issued during the pre-construction phase of the project to indicate the VFD locations as noted are Condenser Water Pump / Cooling Tower Fan VFD’s.

B. RE: Sheets M-101, M-102, E-101, E-102: Field Verify location of existing Chilled Water Pump VFD’s. Confirm existing Grundfos VFD’s Marked as Transfer Pump #1, #2, #3, #4, etc. are controlling other systems. See Figure 3 Below.

Figure 4- Grundfos VFD Approximate Location

29. There are no specifics provided on the type of VFDs required. Please provide full technical details on what VFD is required to include manufacturer, make, model, and other details.

A: Please see Equipment Specification below:

A. VFD-1,2,3,4: Provide and install Chilled Water Pump Variable Frequency Drives (VFD); 75HP; 460VAC, 105A Drive, 96A Drive Bypass; Type 12 Frame C1; 145LBS Weight; NEMA 12 Enclosure, 104°F Temp Rating; Approx. Dimensions: 30”x25”x15” (HxWxD); Side to Side Configuration. Field Verify install location.

(B&G Xylem Brand Part Number P2004298; Technologic Intelligent Pump Controller; Bypass Drive, 3 Contactor, 100KA SCCR, Electronic Control, Fused Disconnect Switch; Nema 12 Enclosure) B. RE: Sheets M101, M-102, E-101, E-102: Sheets will be revised to clarify power circuits connected to new Chilled Water Pumps. Connect new pumps, new VFD’s to (e) Motor Control Center as indicated. Provide new OCPD. Size wire/conduit and route per NEC. Field Verify.

30. Is the fused disconnect required after the VFD at the pump location per note 2 on the pump schedule?

A: Yes. The Fused Disconnect is to be provided with the Pump VFD. See Comment Response #21 above.

31. Refer to Sheet M-001, General Mechanical Demolition Note 4 which reads in part: “Provide new DDC actuators as required.” Please specify the number of DDC actuators the successful offeror will be required to provide.

A: RE: Sheet M-102, M-501: Sheet M-501 Diagram 1 indicates control valves QTY(2); one (1) valve on CWR outlet of Chiller Condenser Section on piping flowing to Cooling Tower, and the one (1) on the CHS outlet of the Chiller Evaporator. Sheets M-102, M-501 will be revised, and sheet re-issued during the pre-construction phase of the project to clarify location of the Control Valves.

33. Could you please provide a POC for the controls contractor for this campus?

A: SIEMENS POC Sales Rep: Gary Dunker ….. I’m chasing down phone number.

34. Are there known hazardous materials on the chiller or piping?

36. Can you confirm that there is no manufacturer spec’d for the drives/VSD’s on the pumps?

A: The station standard is ABB Variable Frequency Drives (VFDs) compatible with SIEMENS.

37. Can you confirm that there is not manufacturer spec’d for the chemical shot feeder?

A. Contractor should be using chemical injection for both chill water and condensing water rather than shot feeders. Recommend consulting Garrett-Callahan rep.: Georgia Izaguirre: office: 972.661.5006.

38. If Isolation Valves do not hold, or are not operational, will be a Modification be provided?

A: Yes.

39. Will there be a scheduled shutdown to change out the pumps?

A: The contractor will propose and request any possible shutdowns with at least two weeks’ notice.

40. How many pumps can be replaced at once without negatively effecting plant operations?

A: One (1)

41. Will there be a modification if the current controls application cannot connect to Bacnet MSTP?

A:

A. RE: Specification Section 230923 Direct Digital Control System for HVAC: The intent, BACNET or otherwise is for the new equipment to interface with the existing campus control system (Siemens Controls).

B. Provide and install equipment that supports BACNET communications protocol. Provide BACNET protocol integration for standalone equipment as appropriate.

C. Connect Chilled Water Plant equipment to remote Campus ECC to facilitate monitoring, control sequences as stipulated in the contract documents. Field Verify that Campus ECC control system facilitates BACNET interface.

42. Do you anticipate any of the campus work to be completed outside of normal working hours, Monday-Friday, 7:30am – 5:00pm? If so, can you provide estimated percentage of work or which part of the scope (i.e. shutdown of pumps) would fall into this category?

A: Same as response to RFI#16, project duration WILL BE changed to 365 days from NTP.

43. Does the contractor need to purchase NEW containers for Chiller #3 R22 Recovery and leave this refrigerant with the VA to use at other facilities?

A: YES.

44. The period of performance for this project isn’t commensurate with the proposed SOW. Lead times for chillers and pumps are 6-9 months and VFDs are one year. With this project being heavily equipment dependent, no meaningful work can be accomplished until the mechanical and electrical equipment is in hand. Will the government consider delaying the NTP until the start of physical construction? If not, will the government extend the POP to account for the extremely long lead times we are encountering for this equipment? Will the government allow the contractor to submit for no-cost time extensions to account for the extremely long lead times we are facing?

A: Same as response to RFI#16, project duration WILL BE changed to 365 days from NTP.

45. Does this project have any access restrictions such as restricted work hours, work periods, etc.?

A: No unusual work periods or restricted work hours required. The vast majority of work is presumed to be within station’s normal operating hours.

46. Is Temp cooling required for this project?

A: RE: Comment Response #23 Above.

47. The electrical plans for this project are missing panel schedules, single line diagrams, as well as a feeder schedule for the proposed equipment. Please provides these necessary documents so an accurate estimate can be assembled.

A: “Additional Construction Documents will not be provided at this time. Contractor’s electrical scope is as defined below:”

A. Contractor shall disconnect power to existing Chilled Water Pumps CHP-1,2,3,4 and reconnect power to new CHP-1,2,3,4. Field verify existing equipment locations, wire and conduit wiring, and motor control center/equipment panel connected to CHP-1,2,3,4. Provide new branch circuit and OCPD per NEC as required. Submit branch circuit layout for approval. RE: Mech Drawings for Power Requirements.

B. Contractor shall disconnect power to existing Chiller No. 3 and reconnect power to new Chiller No. 3. Field Verify existing equipment locations, wire and conduit wiring, and motor control center/equipment panel connected to Chiller 3. Provide new branch circuit and OCPD per NEC as required. Submit branch circuit layout for approval. RE: Mech Drawings for Power Requirements.

C. Contractor shall replace Chilled Water Pump Variable Frequency Drives. Disconnect power to existing VFD-1,2,3,4 and reconnect power to new VFD-1,2,3,4. Field verify existing equipment locations, wire and conduit wiring, and motor control center/equipment panel connected to VFD-1,2,3,4. Provide new branch circuit and OCPD per NEC as required. Submit branch circuit layout for approval. RE: Mech Drawings for Power Requirements.

48. Please provide the make and model of the existing electrical panelboards that are to feed the new mechanical equipment.

A: The existing distribution system equipment includes the makes and models of several manufacturers including Square D, Westinghouse, General Electric, Schneider Electric. It is the intent for the new Chilled Water Pumps to be connected to the existing Motor Control Center. Field Verify.

RE: Sheet E-101, E102: Provide and install new MCC Bucket (Westinghouse) sized per manufacturer’s recommendations to operate with VFD. Route circuit from new MCC Chilled Water Bucket and connect to new VFD and associated pump. Field Verify new equipment locations and routings. RE: Comments #21, #47 above.

49. Are there any known environmental hazards that need to be abated to allow for the project SOW to be completed such as ACM, Lead, etc.?

A: None known for replacing chiller #3 and four chill water pumps.

Solicitation Description:

Upgrade Chiller Bonham, Project No. 549A4-20-700 image4.png image1.png image2.png image3.png