Questions Bldg.80 HVAC Replacement as of 9-13-23 Final.pdf

Questions and responses from TUMR Repair Bldg. 80 HVAC System Replacement W50S9323B0002

QUESTIONS:

1. Does the building have a functional BMS?

Answer: No

2. Does the building HVAC System constant Volume of Variable Volume?

3. Solicitation SOW only calls for wates side balancing only. How about air side?

Answer: Yes. That is correct.

4. Please clarify item 5.3 cleaning internal supply and return of all 3 units. Does this mean duct distribution inside building space?

Answer: Yes, as in 5.4 it reads, “Clean and sanitize all ductwork to include supply and return ducts”. We just want to emphasize with 5.3 to include the supply and return ducts inside the mechanical rooms.

5. Item 5.2.4 Adsil Anticorrosion treatment for the coils. Does this apply only for the chiller Coils or the government intention is to include the AHU Coils as well as a custom option on the AHU's?

Answer: All the coils

6. Item 5.2.1 calls for replacing entire line of Cold water, does this means all cold piping running inside building to the AHUs and Pump? or just the exterior portion from the isolation valves to the chiller?

Answer: Just the exterior portion from the isolation valves to the chiller.

7. Item 5.2.2 calls for 3 AHU's with magnetic starter and VFD, why the duplicity of equipment when VFD can be commanded thru BMS to operate. If building is equiped with a BMS.

8. In order to quote we would need a copy of the plans and specifications. Is this something you are going to include on Sam.gov website?

Answer: -Government doesn’t include a set of plans other than the building existing layout. Section 8.15 of the SOW includes UFC and UFGS specifications related to the HVAC System.

9. In the SOW 5.2.1 It indicates that a chiller will be replaced but there are no specifications for it. Please provide the specifications for the chiller.

Answer: There are no specifications other than an 80 tons chiller. Contractor shall comply with UFCs and UFGSs and submit all equipment.

10. 5.2.2 Like the chiller there are no specifications. Please provide the specifications for the AHU.

Answer: There are no specifications other than three AHUs. Contractor shall comply with UFCs and UFGSs and submit all equipment.

11. 5.2.3 The same with the pumps. Please provide the specifications for the pumps.

Answer: There are no specifications other than a pumping system. Contractor shall comply with UFCs and UFGSs and submit all equipment.

12. 5.2.5 Here it mentions that the technician is certified by Trane. Please provide the specifications for the Trane unit.

Answer: If the approved equipment is Trane, then yes.

13. In the SOW it does not indicate dimensions or distances for the connections of both pipes, ducts and controls. Is there plans that can indicate it?

Answer: We have some old drawings that possible could be used.

14. 1. Please provide GOM and TDH for centrifugal pump to be replaced.

Answer: Is for the contractor to find out this information.

15. Please provide more information for the 80 tons chiller. Options and performance. Existing nameplate does not provide enough information.

Answer: Please see ITEM NO 0001 of the 1442 where it states “80 tons HVAC chiller with a high efficiency system using R32, R454B or other non-ozone depleting HVAC equipment”

16. Please provide more information for (3) AHU’s. Options and performance. Existing nameplate does not provide enough information.

Answer: There is no more information.

17. Please clarify if new controls have to be provided or it will be an integration to the existing one. If it is an integration provide what control is being used.

Answer: New controls have to be provided.

18. Can we coordinate another site visit?

Answer:

Greetings, regarding your request to inspect the facilities current conditions, a site visit was conducted on 9 August as advised in the pre-solicitation notice. Multiple contractors attended the site visit, and an attendance roster was posted in the notice disclosing businesses who participated that day. The government is not planning to conduct another site visit at this time.

However, this does not preclude you from submitting a bid and participating in this requirement as the site visit was not mandatory. There were contractors who contacted us prior to the site visit and decided that they didn’t need to attend the site visit in order to submit their bid. They believed they could gather enough information from the solicitation and from the notice questions and answers in order to do so.

As a reminder, set date in the solicitation for the submittal of offers and in-person Bid opening is September 18, 2023 at 10:00AM EST (local time), instructions for requesting base access that day are in the solicitation.

19. We are assuming that we can use different equipment brands from the ones installed at site, as long as it complies with specifications. Please confirm.

Answer: Confirming that different equipment brands are acceptable as long as they meet Buy American Act requirements.

20. Is the awarded contractor expected to use what is existing in the building or install new controls? In the SOW it says nothing about the controls, please clarify.

Answer: Install new controls.

Questions and responses from TUMR Repair Bldg. 80 HVAC System Replacement W50S9323B0002