6973GH-20-R-00090 Amendment 13 Q and A.docx

Questions (Q) and Answers (A) from SIR 973GH-20-R-00090 HVAC System Upgrade, Raeford, N.C.

as of 5/12/2021

Q. Can we use Equal to DDC Controls manufacturer for the above project?

A. Yes, but DDC must be open-protocol, non-proprietary BACNET compatible

Q. What is the project duration in calendar days? In specs it’s calling for 60 calendar days and on solicitation it’s calling for 45 calendar days. Please confirm A. Project duration is 45 calendar days from the Notice to Proceed (NTP)

Q. Is commissioning of HVAC units required for the project?

A. A 72-hour burn-in testing period is required for each unit. Otherwise, commissioning is only required if a manufacturer representative is required on site for the manufacturer warranty.

Q. Is corrosion coil coating require for the units?

A. No

Q. Are the NEW units are going to be 20 TON? Please confirm?

A. Yes, 20 Ton

Q. Does FAA require third party utility locate for the above project?

A. Utility locate is required, but not necessarily by a third party

Q. Is the above project sales-tax exempt on the equipment & material being used?

A. The contract is with the federal government so it should be tax exempt if you show your contract.

Q. Is Arch flash study/Analyses required for the project?

A. No

1. The units are calling for things like phase loss, phase reversal, etc… Are these units BacNet and/or are they supplied with these points/ hardware? Look at the sequence page/point matrix. I want to make sure I am not having to buy several pieces of electrical hardware to make these points available. Or are they supplied on the unit and not tied in to the DDC?

A. The intent of the drawings is for the units and control panel to use BACnet and not a proprietary control protocol. At the end of the day, the FAA will be looking for BACnet and the points and sequence as described on the controls drawing (M003). Whether or not the AHUs will be supplied to the controls subcontractor with the BACnet board pre-installed is up to the general contractor and/or the mechanical subcontractor.

Q. Can we use Equal to Manufacturer equipment (Package RTU’s) for the above project?

A. Equal to Manufacturer can be submitted if the alternate equipment meets specification requirements.

Q. During the duration of this project, will you need temporary air?

A. Yes, the project will need two temporary HVAC units to be used during construction, with each one capable of carrying the building load. Two units are required to provide redundancy in case the lead unit fails.