Attachment 0005_APPENDIX D - DWG 114-002 (1).pdf

This document is a set of technical design drawings and specifications for the repair of the chilled water system in Building 114. The project encompasses mechanical, electrical, and architectural work required to restore and upgrade the existing chilled water distribution system serving multiple buildings on a federal facility.

The mechanical work includes repair and replacement of eight chilled water pumps with new centrifugal pump units, demolition of the existing expansion tank and installation of a new replacement tank with updated support structure, replacement of piping and fittings throughout the system, installation of new control valves (gate valves, check valves, butterfly valves, and ball valves), addition of pressure relief and temperature sensing equipment, and renovation of the chiller control system. The electrical work requires removal of existing switchboards and motor control centers, installation of new electrical distribution equipment, rewiring of pump motors and control circuits, roof-mounted electrical demolition work, and implementation of a new distributed control system (DCC) with pneumatic and electronic controls for system operation and monitoring. Architectural elements include rust stain repair on the building exterior, support structure reinforcement for the new expansion tank, and modifications to the control room layout. The drawings provide detailed isometric piping diagrams for each of the eight pump stations, equipment schedules, schematic control system diagrams, and hardware point location plans. All work must comply with federal building standards and codes applicable to the facility location.