AMEND 01_SOLICITATION_W912C321B0001_AC Replacement Bldg 540_20210826.pdf

0011616533

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

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 (Type or print)

30-105-04EXCEPTION TO SF 30

APPROVED BY OIRM 11-84

STANDARD FORM 30 (Rev. 10-83) Prescribed by GSA

FAR (48 CFR) 53.243

a. This amendment is issued for the follow ing:

1. To provide response to questions submitted by vendors.

2. Based on the above responses, revisions to Attachment 01 SOW Rev 01, Attachment 02 Draw ings Rev 01 and Attachment 03 Photos w ere incorporated.

b. Solicitation bid opening date and time remains unchanged.

1. CONTRACT ID CODE PAGE OF PAGES

J 1 9

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

16C. DATE SIGNED

BY 26-Aug-2021

16B. UNITED STATES OF AMERICA15C. DATE SIGNED15B. CONTRACTOR/OFFEROR

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

8. NAME AND ADDRESS OF CONTRACTOR (No., Street , County, State and Zip Code) X W912C321B0001

X 9B. DATED (SEE ITEM 11)

06-Aug-2021

10B. DATED (SEE ITEM 13)

9A. AMENDMENT OF SOLICITATION NO.

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

X The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offer is extended, X is not extended.

Offer 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 copies 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 ADMINISTRATIVE 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 copies to the issuing office.

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

10A. MOD. OF CONTRACT/ORDER NO.

2. AMENDMENT/MODIFICATION NO. 5. PROJECT NO.(If applicable)

6. ISSUED BY

3. EFFECTIVE DATE

26-Aug-2021

CODE

MICC - FT BUCHANAN

FT BUCHANAN

DIRECTORATE OF CONTRACTING

34 SOUTH GATE RD, STE 1104

FORT BUCHANAN PR 00934-4206

W912C3 7. ADMINISTERED BY (If other than item 6)

4. REQUISITION/PURCHASE REQ. NO.

CODE

See Item 6

FACILITY CODECODE

EMAIL:TEL:

W912C321B0001

SECTION SF 30 BLOCK 14 CONTINUATION PAGE

SUMMARY OF CHANGES

(End of Summary of Changes)

The following items are applicable to this modification:

Q&A W912C321B0001 – Solicitation Questions and Answers.

1. Provide the Fire Alarm Maintenance subcontractor for AC units Connection to the fire alarm.

Answer: ARA Integrators Inc. 787-225-7637 (Kenneth).

2. Do you require a Smoke detector to supply and return the 8 ton unit?

Answer: This unit will be a computer room air conditioning unit (CRAC) instead of a Roof Top Unit (RTU). Instead of installing a new smoke detector, the new requirement is to install a new relay module near to the 8 r-tons condensing unit, this is in order to turn it off in case of a fire. Connect the new relay module to the nearest smoke detector.

Fire control panel programming is required with the intention of turning off all new VRF units and the 8 r-tons unit when a fire is detected by any of the smoke detectors in the project work area. See Attachment 02 – Drawings Rev 1. Page M-1 and Attachment 01

– SOW Rev 01. Was updated to change RTU to CRAC.

3. 8 Tons AC Unit insulation will be closed cell insulation and Aluminum Jacket, at exterior?

Answer: Yes, see SOW Section 01 11 00, Mechanical Work Paragraph 1.2.5.3.6.

4. Provide details how the roof unit and VRF Outdoor units will be anchored.

Answer: As aforementioned, the roof top unit will be changed to a CRAC; that being said the VRF Condensing unit should be anchored with required bolts and expansion at the new concrete pad. The CRAC condensing unit should be anchored/installed similar to the existing unit. Per Section 23 00 00, Paragraph 2.5 & 2.6.

5. Provide existing roof contractors for roof repairs.

Answer: Tropitech Inc.; Federico Roca: 787-765-7451

6. Provide an existing AC Controls contractor to connect the units to the existing control system.

Answer: For the purpose of this contract, new units must be BaCnet ready.

Connections are not required under this contract.

7. Note 6 on drawing M-1, note 3 asks for a smoke detection board. Please clarify if the new VRF units shall have the capacity to receive or send a signal from the fire alarm panel to turn off the AC. Please provide a sequence of operation.

Answer: Instead of installing a new smoke detector, the new requirement is to install a new relay module near each 3 VRF condensing units, this in order to turn them off in case of a fire. Connect the each new relay module to the nearest smoke detector. Fire control panel programming is required with the intention of turning off all new VRF units and the 8 tons unit when a fire is detected by any of the smoke detectors in the project work area. See Attachment 02 – Drawings Rev 1, Page M-2.

8. Provide Existing Challenger MDP Panel board Model and Breakers model of the existing breakers. That will help to get replacement breaker for this panel board? Older panel boards have no replacement breaker.

Answer: Existing panel board will not be replaced. Panel board model is unknown, but it is from challenger brand, 120/208V 3-Phase, 18 KAIC. Breaker models are unknown.

9. Existing spaces at MDP, have bus bars and breaker to bus bars mounting kits available for new breakers.

Answer: MDP has two additional spaces for new breakers and new mounting kits. See attachment 03 photos.

10. Who will move desk chairs and others to perform the work in the offices in order to remove the ductwork and install the new refrigeration lines above the hung ceiling?

Answer: The contractor shall consider the temporary relocation of furniture within the building if required and protection of the equipment with plastic covers. Contractor is not responsible to move personal items or computers.

11. Will the offices occupied during work?

Answer: Yes, the building will be occupied. The impacted spaces will be available based on the corresponding logistics plan.

12. Please provide the model of the existing electrical panel?

Answer: See answer to questions 8 & 9.

13. Based upon preliminary mechanical drawings T-1, D-1, M-1, and E-1 dated January 2021 by A. Velez, herein please find our questions to the above reference solicitation.

Mechanical:

a. Drawings do not reflect any fresh air intake on new Cassette/VRF system.

Please provide information as to how comply with this task.

Answer: In accordance with ASHRAE Epidemic Task Force, requirements will be to use units that capable to achieve MERV 13 or better levels of filtration performance for air recirculated by HVAC systems.

b. Can you please specify the drain piping location for the AHU/cassettes units?

Answer: Drainage piping will mirror refrigerant piping route to discharge outside the building.

c. Please specify design temperature conditions for cassettes systems? What would be total load per room?

Answer: For the first question, 55% indoor relative humidity, the operative temperatures recommended by ASHRAE range from 68.5F to 72F. For the second question please refer to drawing M-1; CFM per room based on the 20 tons VRF system.

d. Please provide suspended mechanical equipment support installation details for cassette type air handlers. (Include seismic bracing).

Answer: As describe section 09 51 00 – ACOUSTICAL CEILINGS Products;

Paragraph 2.2

Suspended ceiling framing system must have the capability to support the finished ceiling, light fixtures, air diffusers, and accessories, as shown. Provide a suspension system with a maximum deflection of 1/360 of the span length.

Conform seismic details to the guidance in UFC 3-310-04 and ASTM E580/E580M.

e. Please provide location of thermostat on each office / room.

Answer: Thermostat location was added to Attachment 02 – Drawings Rev 1, Page M-2.

f. Please clarify if VRF condensing units coils required any corrosion treatment.

Answer: Yes, the units must have an anti-corrosion treatment. 09 90 00 - PAINTS AND COATINGS, Paragraph 3.4

g. Do we need to provide a Master control for the complete VRF system?

Answer: Yes, installation will require a VRF centralized controller; one (1) per condensing unit at one space; refer to drawing M-2. On the other hand, each office will require a remote control per cassette unit.

h. Do we need to include integration of new HVAC to existing building control system or only provide Bacnet enable system?

Answer: Only provide BaCnet ENABLE system.

i. New server unit is to be installed in the roof? Do you mean Roof top unit or do you mean a split system with a horizontal air handling unit between suspended ceiling and ceiling? Please clarify.

Answer: See Attachment 01 SOW Rev 01 with corrections. Server unit will be

CRAC.

j. Please provide suspended mechanical equipment support installation details for air handling unit in the event that is a horizontal discharge configuration. (Include seismic bracing).

Answer: As describe section 09 51 00 – ACOUSTICAL CEILINGS Products, Paragraph 2.2

Suspended ceiling framing system must have the capability to support the finished ceiling, light fixtures, air diffusers, and accessories, as shown. Provide a suspension system with a maximum deflection of 1/360 of the span length.

Conform seismic details to the guidance in UFC 3-310-04 and ASTM E580/E580M.

k. Drawings do not show an air distribution system for Server unit, Can you please send us a drawing illustrating how should we do it?

Answer: The server room currently have what is called hot aisle/cold aisle configuration. See below diagram.

l. Please specify server room temperature and humidity requirements.

Answer: As per ASHRAE and equipment temperature and humidity requirements; 45%-55% RH, 55-65F temperature range.

m. Do we need to provide a back-up unit for Server room?

Answer: No.

n. In reference to existing fire alarm system, which requires new a/c system integration, please clarify how smoke detector board/s on VRF systems are to be installed/integrated. Same for new server room a/c system.

Answer: Refer to Attachment 02 - Drawing Rev 1 Page M-2. Note: Contractor is required to coordinate with existing fire alarm contractor (ARA Integrators Inc) for installation & integration.

o. On server room system, is the smoke detector unit mounted?

Answer: Yes, refer to Attachment 02 - Drawing Rev 1 Page M-2.

p. Where is the location of the fire alarm system?

Answer: Refer to Attachment 02 - Drawing Rev 1 Page M-2.

q. Can you provide fire alarm maintenance contractor contact information?

Answer: ARA Integrators Inc. 787-225-7637. (Kenneth)

r. Civil - Please clarify if existing roof treatment still under warranty?

Answer: Yes, contactor is Tropitech Inc.; Federico Roca: 787-765-7451

s. Please provide roof contractor contact for repairs if necessary.

Answer: Contact Tropitech Inc.; Federico Roca: 787-765-7451

t. If roof top unit is required, please clarify installations details.

Answer: RTU is not required, CRAC will be require at the Server room and VRF at office spaces.

u. Please provide through the roof refrigerant line penetration details.

Answer: For the CRAC use the same roof penetrations. For the New VRF system, please refer to Attachment 02 - Drawing Rev 1 Page M-1 Special note # 5.

v. Please provide roof supports details for condensing units.

Answer: It will be based on the selected air conditioning - condensing unit and if existing supports can be re-used.

w. Please clarify VRF and roof mounted condensing unit anchorage details.

Answer: As aforementioned, the roof top unit will be changed to a CRAC; that being said the VRF Condensing unit should be anchored with required bolts and expansion at the new concrete pad. The CRAC condensing unit should be anchored/installed similar to the existing unit. Per Section 23 00 00, Paragraph

2.5 & 2.6.

Supporting elements shall conform to SMACNA 1403, SMACNA 1922, SMACNA 1520, SMACNA 1378, and NFPA 91, as applicable, and modified and supplementary requirements specified herein. Do not use weld studs and powder actuated anchoring devices to support mechanical systems components without prior approval.

x. Can you supply specifications on suspended floor tiles for possible repairs after Liebert unit is removed?

Answer: Refer to Attachment 03 Photos. Tiles are 2’x2’ please install equal or similar to existing one.

y. What is the thickness of existing wall? (For exhaust, vent opening repairs).

Answer: 6 - 8 inches depending of the exterior wall location.

14. We can not find the Server room Indoor AC unit Feeder and disconnect. Drawing shows the disconnect and feeder for the roof unit but interior unit has no feeder. Please Clarify.

Answer: See electrical notes Attachment 02 Drawing Rev 01, E-1, Electrical Notes #1, #11 and # 12. Indoor unit will have a breaker and will receive power from MDP.

15. Drawing E-1 note 4 requires a 100A disconnect switch for Server Room AC outdoor unit at roof, but legend specifies a 60A disconnect for the same equipment, which one is the correct?

Answer: See electrical notes Attachment 02 Drawing Rev 01. The disconnect for note 4 should be 100 amps. This item on the legend has been updated.

16. Specs ask for "1.2.5.1 Replace HVAC and Controls Systems for Building 540 as indicated on drawings (D-1, M-1)." But D-1 has no notes or indication related to controls and M-1 only asks for compatible equipment with the METASYS System. Please provide a Control Protocol to be used and control sequence operation.

Answer: For the purpose of this contract, new units must be BaCnet direct digital control ready. See Attachment 01 – SOW Rev 01 & Attachment 02 Drawings Rev 01.

17. Specs ask for "2.12.3.6 Variable Air Volume (VAV) System" we assume this is not applicable to this project"

Answer: This is not applicable to this project. Paragraph was removed. See Attachment 01 – SOW Rev 01.

18. Specs page 474:…Open implementation of LonWorks technology using CEA- 709.1B as the communications protocol and using LonMark Standard Network Variable Types as defined in LonMark SNVT List for communication over the network.

but drawing M-1 asks for ser Metasys. ( Bacnet. Protocol) , please clarify?

Answer: For the purpose of this contract, new units must be BaCnet direct digital control ready. See Attachment 02 Drawings Rev 01. Page M-1

19. On spec section 23 09 53.00 20, page 574 ask for:

a. This requirement Apply to this Bid? This report will be part of this bid and the cost of the repair will be a Change Order?

Answer: This project does not require adjusting and balancing. Section was removed since, is not part of the contract.

b. Is not possible include the, in our proposal, cost repairs that depend of a report that will be performed after project award. Please Clarify.

Answer: This project does not require adjusting and balancing. Section was removed since, is not part of the contract.

20. What is the current interruptive capacity in KAIC for the existing MDP?

Answer: 18KAIC.

21. What is the current interruptive capacity in KAIC for the new panel boards?

Answer: 10KAIC.

22. Page 1 of SF1442 indicates the time for completion is 150 calendar days. However, page 24 of the Solicitation document indicates it is 180 calendar days.

Answer: Page 1 SF1442, was updated to 180 calendar days.

23. After studying the drawings supplied, it was noted that specified CFMs specified for each one of the cassettes, when added all together and using industry standard design criteria, we came up with a total refrigeration capacity of approximately 28 Tons per condensing unit instead of the 20 Tons capacity specified on the drawings. Please confirm if we should limit the capacity of the cassette units to stay within the 20 Ton capacity unit specified or if we should consider a larger condensing unit (~28 tons) to make sure we get the CFMs specified on the drawing for each of the cassettes as indicated on the drawing.

ANSWER: Please refer to Attachment 02 Drawing, Page M-1 specified spaces and CFMs table. Note: Requirement is not for the entire building.

24. Please confirm the make and model of the electrical distribution panel that will feed power to the new condensing units.

ANSWER: New Panel boards shall comply with SOW Section 26 24 16. 00 Panel boards. Also see Drawings Page E-1, Electrical notes 20 & 21 for information regarding capacity, amps, voltage, circuits, etc.