Specifications include, but are not limited to: CHFA is seeking proposals on the replacement of all three air-cooling units and related equipment located in its third-floor main computer server room and on roof. The following more specifically describes the existing equipment: • Three 5-ton Liebert BU067A-CAEI (in third floor server room) • Three .5 HP supply fan motors (in third floor server room) • Three .25 condenser fan motors (in third floor server room) • Three 95 F Liebert ambient fan speed control condensers (on roof); The services also include but may not be limited to the recovery and proper disposal of refrigerant from the existing three units, disconnecting and disposing the existing equipment, the installation of new refrigerant lines, if needed, and electrical upgrades for the new condensers, if required. CHFA encourages companies to consider more efficient units and equipment in the proposal to replace CHFA’s existing equipment. New equipment performance requirements desired include electric re-heat for dehumidification, variable speed EC fans, refrigerant side economizer for winter free-cooling, networked control system to integrate and stage all three units via single lead/lag/staging control, bacnet connection for future BMS integration, and low-GWP refrigerants, if available. New equipment airflow configuration shall match existing units; nominal and actual capacities shall match the existing units; power supply (voltage, phase, and frequency) shall match the existing units; physical size shall be approximately the same as the existing units; and weights shall be approximately the same as the existing units. Companies shall be responsible for obtaining for CHFA all available utility rebates, incentives and/or credit, if any, for equipment. CHFA makes no representation as to the status of any piece of equipment. The selected company will be responsible for examining each component as part of the project.
