RFI JCI 002 HVAC_Response.pdf

REQUEST FOR INFORMATION (RFI)

36C25020B0070

PROJECT NUMBER: 539-333 Please ensure that before submitting questions or requests for clarification that you thoroughly read the solicitation, specifications, drawings and other pertinent documents. When submitting questions on this project the Government requires contractors to specifically identify the specification and/or solicitation section(s) or drawing number(s) in reference to the question or request for clarification submitted. No question or request for clarification will be answered by the Government unless the above requirements are met. Failure to comply may prevent the Government from responding in a timely manner.

PROJECT TITLE: (Const) Construct 3rd Floor Bldg. 2 and Renovate 1st Floor

PROJECT LOCATION:

Department of Veterans Affairs Cincinnati VAMC 3200 Vine St.

Cincinnati, OH 45220

SUBMITTED BY: CITY/STATE:

PHONE:

TO:

Yvonne Demorest, Contract Specialist Department of Veterans Affairs NCO10 West Contracting Office 2780 Airport Dr., Suite 340 Columbus, OH 43219 Yvonne.demorest@va.gov

RFI NO.: 001 DATE: 3-9-21

SPEC/DWG. REFERENCE(s):HVAC Mechanical Drawing M601

REPLY NEEDED BY:

Question:

1) 2-AHU5 - Economizer relief air appears to open into the vestibule with no additional opening shown on the drawing to relieve to the outside completely. Where should that damper be located?

2) 2-AHU5 - Supply and Return static pressure shown of 4.9" and 1.9" on the schedule, is this the external static pressure or total static pressure? It doesn't seem to add up with all of the internal pressure drops as well as opening pressure drops.

3) 2-AHU5 - For the fan motors, Max BHP is that 2@8.8 = 17.6 total BHP at 4.9" TSP? More referring to the above, we need the external pressure drops to account for the proper motor sizing.

4) 2-AHU5 - For the Nom 2@11hp, there are no nominal horsepower motors at 11. 10, 15, 20 and so on, but not 11. What is this value referring to?

5) 2-AHU5 - Backdraft dampers are referenced but not shown on the drawings

6) 2-AHU5 - Overall unit length of 533" shown, is this to line up with existing openings, or is a shorter unit acceptable?

mailto:Yvonne.demorest@va.gov wjsamson Text Box Responses:

1) Motorized Damper shall be located at unit relief opening. Louvers and gravity backdraft dampers shall be provided in vestibule to relieve air to outside.

2) Total Static Pressure. External static pressures are listed on the Air Handling Unit Schedule.

3) See item #2.

4) The Basis Of Design Unit Selection has 11 HP fans.

5) Backdraft dampers are required.

6) A shorter unit is acceptable as long as specification requirements are met.

COPY TO: ATTACHMENTS:

DATE: REPLY FROM:

REPLY:

RFIs will be answered by amendment(s).

INFORMATION NEEDED: