140P2022R0019-0003_Att02-QuestionsAndResponses_01-11_220308_0003.pdf

140P2022R0019 Questions and Answers – Amendment #0003 03/08/2022

The following is a consolidated list of current vendor questions. Responses in red shall address questions not previously responded or to provide updates to questions in which responses had been previously provided. Please note that some of the attached questions are still pending responses, which will be provided in a future amendment.

Verbal questions provided during the preproposal meeting held on March 1, 2022:

1. What kind of controls are currently in use?

Response: The existing controls are a Johnson Controls FX systems, see M700 Sheets and specification section 230913 for additional information.

2. Will the contractor be allowed to use the existing elevator?

Response: Spec section 01 11 00 states: “Existing Elevator Usage: Use of existing freight elevator to transport tools and equipment to/from roof shall be coordinated in advance with NPS personnel.

Contractor is responsible for installing/removing protective blanket/plywood to prevent damage to elevator. Contractor shall not load elevator beyond its safe working load. Elevator shall not be used to transport contractor personnel.” Additionally, stairs are available for use to the rooftop.

3. Is sound attenuation required on the new Cooling Towers?

Response: No sound attenuation is required. The sound performance of the specified towers is acceptable.

All questions provided below were submitted by vendors following the preproposal meeting:

4. Does any of the piping get blasted/primed / painted? If so, please send the painting/prime specifications.

Response: Specification Section 230500 indicates that painting of HVAC components is specified in Division 9 but no Division 9 was provided. Painting is only required for chilled water piping per the following: External surfaces of chilled water piping shall be cleaned and painted. Brush or roll three coats RustOleum “RustOCrylic”5700, Red primer (5769), grey coat (5781), finish (5779) to 4-6 mil final film thickness. Sherwin Williams equivalent allowed.

5. How can we find out what the power is downstairs? I forgot to take a picture of the available amperage. Please let me know.

Response: Refer to the three one line diagrams (ED700, EI700, and E700) for information on available power. If these drawings do not answer the question, please provide more specific information on what is needed.

6. I noticed Carrier is not listed in the chiller specifications as an acceptable manufacturer.

Response: Pending

7. I noticed the machines are selected with R-514A refrigerant, but the specifications mention R-134A or R-514A as being acceptable refrigerants. Does NPS have a preference to what refrigerant is included based on the phase out protocol that plans to happen in the upcoming years with R-134A?

Response: Pending

8. Is the contractor responsible for the first fills (i.e., glycol , chemicals , oils , water treatments , grease etc.)?

Response: Yes

9. Is the temporary power that’s available sufficient to feed the temporary Chiller?

Response: Refer to EI700 one line showing location for power to temporary chiller, and notes regarding power for the temporary chiller.

10. What are the contractor pump requirements needed to run the temporary chillers?

Response: Refer to temporary air cooled chiller schedule on sheet M600, the second line on the schedule indicates pumping requirements for the temporary chiller.

11. Please clarify if this project has a “Buy American “ act or a Material origin restriction.

Response: The solicitation has the two Buy American Act clauses in place (52.225-9 beginning on page 26 and 52.225-10 beginning on page 46).

(End of Amendment 0003 Q&As)

140P2022R0019