Design-Build Mechanical Upgrade at DISA

This project will remove one water cooled chiller and three cooling towers. Provide two closed circuit cooling towers identical to those replaced and connect them to the existing water cooled chillers. Re-size and replace three existing condenser pumps, three secondary-chilled water pumps, and three secondary-chilled water pumps. Add 1000 tons worth of air cooled chillers in the mechanical yard. Add a water to water plate and frame heat exchanger from the cooling tower condenser loop to the chilled water loop. Modify the primary chilled water loop to provide chilled water from all water/air cooled chillers to the IT secondary pumps and the admin secondary pumps. Create a new separate secondary chilled water loop from the expanded primary chilled water loop to supply the administrative load. The entire chilled water system design shall have complete 2N redundancy and be interconnected.

Division 23 -

Heating, Ventilating, and Air Conditioning (HVAC), Instrumentation and Control for HVAC, HVAC Air Distribution, Cooling Towers, Central HVAC Equipment.