Description
The Department of Veterans Affairs is seeking a qualified contractor to replace the two chillers that serve Air Handling Units (AHU) 1 and 2 at the Durham VA Medical Center. The scope includes demolition of existing equipment, structural steel modifications on the roof, installation of new chillers, associated glycol loop work, electrical upgrades, integration with the existing Building Management System, and full documentation (as‑built drawings, testing & balancing, commissioning support). Work must be performed while the facility remains fully operational 24 × 7, requiring phased construction, strict utility‑outage coordination, and adherence to VA safety, fire‑watch, and infection‑control protocols. The contractor must complete the effort within 270 days of notice to proceed and provide all labor, materials, permits, testing, and reporting.
• Replace two rooftop chillers (≈12,010 lb each) and associated pumps.
• Provide structural steel supports, crane lift planning, and roof penetrations.
• Install new glycol makeup system (≈40 % propylene glycol) and integrate with existing chilled‑water loop.
• Upgrade electrical feeders (additional ~1060 A load) and variable‑frequency‑drive pumps.
• Coordinate with VA COR, A/E, and on‑site staff; hold weekly progress meetings.
• Maintain continuous hospital operations; schedule utility outages on second shift/weekends with 20‑day notice.
• Deliver red‑line drawings, testing & balancing, and commissioning documentation.