Attachment 5 Consolidated Q and A.docx
DOCX document 18 KB Posted
- Attached to
- Replace Chiller 2, B500
- Solicitation number
- FA460026B0005
About this file
This is a Consolidated Questions and Answers (Q&A) document for Air Force solicitation FA460026B0005 addressing clarifications on the Replace Chiller 2, B500 project at Offutt AFB, Nebraska. The document consolidates responses to six technical inquiries with revisions dated through September 10, 2026, reflecting evolving clarifications on project scope and existing conditions.
Key technical clarifications include: (1) the existing Building Management System is a Honeywell Enterprise Building Integrator (EBI) Version R430.1 that is partly functional, and the new chiller must integrate with it; the Government holds necessary credentials and licensing, and will furnish existing controls documentation, point lists, and programming to the successful contractor; (2) the Refrigerant Monitoring Control Panel may be furnished by either the chiller manufacturer or the contractor, at the contractor's discretion; (3) no control valves are included in the scope of work, with analog thermometers and pressure gauges to be new while existing sensors are to be removed, saved, and reinstalled via new threaded olets; (4) the existing exhaust fan VFD for EF-202 should be assumed to require modification to accommodate the full-speed safety override for refrigerant leak detection, while existing dampers, actuators, and control panels are to remain and be reused; and (5) refrigerant sensors (ten total for both R-134a and R-515B) may be furnished by the panel supplier, chiller manufacturer, or contractor, at the contractor's discretion. This Q&A document serves as clarification guidance for bidders and does not address pricing, award dates, or specific set-asides.
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Attachment 5 – Consolidated Q&A Document for FA460026B0005 - Replace Chiller 2, B500
Historical/prior responses are retained below solely for transparency and reference. Where conflicts exist between revisions, the latest dated response shall govern.
Q1 — Existing Front End: The Temperature Control Notes on MD1.0 require integration of the new equipment into the existing building management system and updating of system graphics. Please identify the existing front end (manufacturer, model, and version), and confirm the Government holds and will furnish the credentials and licensing necessary for the awarded contractor to add the new equipment points and graphics.
· Original Posting: Answer will be posted in the next Amendment.
· 8 September revision: Existing BMS in B500 is inoperable. Therefore, contractors need not tie into existing system. Contractor shall install per spec, so future tie-in can be made by USG when BMS is repaired or replaced.
· 10 September revision: The B500 complex does have its own BMS system that is partly functional. The new chiller does need to tie into that. That existing system is a Honeywell Enterprise Building Integrator (EBI) Version R430.1. The Government does hold the credentials and licensing necessary for the awarded contractor.
Q2 — Existing Controls Documentation:
Will the Government furnish existing controls documentation, point lists, and programming for the existing DDC systems that new work must coordinate with?
· Original Posting: Answer will be posted in the next Amendment.
· 8 September revision: Yes, this data can be furnished to the successful bidder.
Q3 — Refrigerant Monitoring Panel Responsibility:
Sheet M3.0 shows a new Refrigerant Monitoring Control Panel with associated sensors, alarm horns, and beacons. Please confirm whether this panel is to be furnished by the chiller manufacturer as part of the chiller package or furnished separately by the contractor as a standalone refrigerant monitoring system.
· Original Posting: To be determined by the contractor. Contractor is free to select whichever path provides a functioning system as designed.
Q4 — Control Valves and Sensor Scope: Drawings M2.0 and MD1.0 indicate existing sensors are to be removed, saved, and reinstalled in new piping via new threaded olets (MD1.0 flag note 11; M2.0 flag note 2), and new analog thermometers and pressure gauges are to be provided (M2.0 flag note 1). No control valve replacement is shown. Please confirm: (a) no control valves are included in the scope of work; and (b) which temperature sensors and differential pressure devices are intended to be new versus reused existing.
· Original Posting: Per drawings, if control valves are not shown to be replaced, they are not included in the scope. Per flag notes, Analog thermometers and pressure gauges are to be new, all other control devices referenced in this question are to be removed, saved and reused per MD 1.0 Flagnote 11.
Q5 — Exhaust Fan EF-201/EF-202 Existing Conditions:
The control sequences on M3.0 require EF-202 to be driven to full speed upon refrigerant leak detection. Please confirm the existing conditions of EF-201 and EF-202: (a) does the existing EF-202 VFD have an available dedicated input for the full-speed safety override, or is a VFD replacement/modification anticipated; and (b) are the existing outside air damper actuators (CD-201 through CD-204) and the existing damper control panel to remain and be reused?
· Original Posting: For bidding purposes, assume the VFD will need modification to accommodate. Existing dampers, actuators and control panels to remain.
Q6 — Refrigerant Sensor Supply:
Sheet M3.0 requires refrigerant sensors for both R-134a (existing chillers) and R-515B (new chiller), ten sensors total. Please confirm whether these sensors are to be furnished as part of the refrigerant monitoring panel supplier's package, furnished with the chiller, or furnished separately by the contractor.
· Original Posting: To be determined by the contractor. Contractor is free to select whichever path provides a functioning system as designed.
File details come from the government source that posted it. Updated .