RFIs - 697DCK-26-R-00330 - CDC ARSR HVAC Replacement.pdf

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REQUEST FOR INFORMATION

697DCK-26-R-00330 - CDC ARSR HVAC Replacement

Due: August 4, 2026/ Extended: August 11, 2026

Pre-Bid Site Visit: July 30, 2025 Bids Due: August 13, 2025/Bid Extension: August 20, 2026

1. What is the Part Number for the Existing Air Conditioning Unit? Will the FAA consider alternative systems?

FAA: The existing unit is now obsolete. Amendment 0001, issued on August 3, 2026 on SAM.gov, specifies new 15 Ton Carrier Omnizone 50 XCR HVAC or approved units. All items/equipment on this project must meet the Buy America Preference (3.6.4-5 FAA BUY AMERICAN PREFERENCE - STEEL AND MANUFACTURED GOODS

(APR 2022).

2. Will an Arc Flash Study will be required at the facility?

FAA: Yes.

3. What is the scope of the flash study? Is it an all-encompassing, full site arc flash study or is it only for specific areas? If only specific areas then please provide details if available.

FAA: The purpose of this arc flash study will be to ensure safety for personnel and equipment surrounding any new electrical components associated with this project. This is to include an arc flash study as well as ensuring appropriate arc flash labels are installed/applied at the completion of equipment installation, modification, renovation, or replacement in accordance with JO 3900.64.

4. What are the parameters for the study?

FAA:

a. The Contractor shall perform a complete short-circuit, protective device coordination, and arc flash hazard analysis in accordance with NFPA 70E, NFPA 70 (NEC), IEEE 1584, OSHA requirements, and applicable FAA standards such as JO 3900.64. An arc flash study shall be required for all new electrical equipment including disconnects, modifications to existing electrical distribution systems, changes to protective devices or settings, electrical refurbishments, or where existing arc flash documentation is missing, outdated, or invalid in relation to the scope of this project. Studies shall be based on field-verified data and reflect the final installed condition. Arch flash warning labels shall be provided and installed on all applicable equipment.

b. Determine arc flash boundary distances, incident energy levels and required Personal Protective

Equipment (PPE) for each piece of newly installed equipment.

c. Submit an updated detailed Arc Flash Report to NDP via the COR or PM.

5. What documentation before, during and after would be required to be submitted?

FAA: Documentation after includes an arc flash study report. Other documentation includes providing the

P a g e 2 | 4 - CDC ARSR HVAC Replacement appropriate arc flash labels installed/applied at the completion of equipment installation, modification, renovation, or replacement as designated by JO 3900.64.

6. Confirm the required cooling capacity for the replacement radio room wall unit.

FAA: alternate capacity compatible with the existing power supply.

7. If electrical modifications are not intended in the radio room, please provide an acceptable alternate capacity compatible with the existing power supply.

FAA: If proposed unit requires 240 volts, then contractor should plan on installing up to 50’ feet of wiring and conduit and a circuit breaker that will be fed from the nearest electrical panel. Exact location will TBD on site.

8. Identify any known lead-based paint, asbestos-containing material, hazardous refrigerant, or environmental survey information available for the existing equipment, ductwork, coatings, penetrations, and affected building areas.

FAA: Not anticipated to have work disturbing these areas. ACM in walkway and under carpet. Per SOW, contractor shall develop site specific work plan should the need to disturb ACM arise.

9. Will unforeseen hazardous material abatement outside the stated work-around procedures be handled by modification?

FAA: Waste Disposal and hazardous abatement should be handled under CFR guidelines.

10. Please provide or confirm the existing electrical service, breaker sizes, disconnects, feeder capacity, control voltages, panel locations, short-circuit requirements, and any anticipated electrical upgrades for the two 15-ton packaged units and radio-room equipment.

FAA: No anticipated electrical upgrades required for these two units.

11. What minimum temporary-HVAC capacity, redundancy, setup time, and continuous-operation requirements must be maintained while the radar facility remains operational?

FAA: Required redundant temporary cooling with 24-hour continuous run-in time prior to switching to new units. Required Temporary HVAC should be similarly sized to units.

12. Please provide the required approved-equal criteria for alternatives to the specified York units, including dimensions, efficiency, heating capacity, electrical characteristics, controls compatibility, coatings, and lead-time requirements.

FAA: Criteria listed on SOW under “New Air Conditioners-Equipment Room”. No economizer necessary.

13. Are any site photographs, measurements, existing equipment nameplates, panel schedules, duct dimensions, ceiling quantities, lighting counts, or hazardous-material survey information available to non-attendees?

FAA: No photos are available.

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14. Please confirm responsibility for temporary HVAC sizing, utility power, fuel, controls, maintenance, and continuous operation during demolition and changeover.

FAA: Contractor is responsible for providing temporary HVAC units, of similar size, prior to switching new units. A 24-hour continuous run-in test is required prior to switching. We require redundant cooling during the duration of the project.

15. Please identify whether the Government has an engineer’s estimate or quantities for ceiling tiles, LED fixtures, ductwork, temporary cooling, panel/breaker work, and arc-flash study updates.

FAA: Approximately 24 lights and 240 ceiling tiles, will need to field-verify.

16. Site Visit Attendance FAA: Attachment

Attachments Attachment: RFI Site Visit Attendance – CDC ARSR HVAC Replacement

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ATTACHMENT: RFI Site Visit Attendance

697DCK-26-R-00330 - CDC ARSR HVAC Replacement Site Visit: July 30, 2026

The Following Primary and Sub-Contracting Companies Attended the CDC ARSR HVAC Replacement Site Visit

Eleven Bravo Group LLC

NexTech CCI Mechanical SterileCo. LLC

Delta Consulting Engineers Cresco Consult LLC

Desert Development Iris Enterprise Solutions, LLC

Sage Mechanical LLC Pro Finish Plus LLC

GlenChoice Management LLC Lonergan Electric Service, Inc