Electrical and HVAC 513

The main areas of work covered in this scope are located on the 1st floor and include three (3) classrooms, three (3) training labs and an antenna platform which will be located outdoors on the east side of the building. The intent of this scope is to remove one (1) computer room air conditioning unit and install three (3) direct expansion computer room units in rooms 110, 117 and 126B. This scope is based on the demolition of the existing computer room unit (CRU-1) located in room 110 along with all the above the ceiling sheet metal ducting and flexible ducting to the existing ceiling mounted diffusers. Contractor shall provide and install three (3) direct expansion up flow computer room units with remote condensing units, contractor shall fabricate new exterior insulated sheet metal duct systems with flexible ducting to the new and existing diffusers, provide and install transfer ducting between rooms 117 - 118. Contractor shall core drill thru the CMU exterior wall and install piping sleeves for the installation of the refrigerant lines and condensate drain lines. Contractor shall provide and install new insulated refrigerant line sets and condensate drains for each of the three (3) computer room units up and overhead above the ceilings routed to the outside wall to each of the three (3) condensing units. Contractor shall provide and install aluminum service jacket over the insulated refrigerant lines exposed to the outside elements, refrigerant lines shall be secured to the outside wall of the building and shall have elevated pipe stands between the building and the condensing units. Contractor shall provide and install Rubber-In-Shear vibration isolators pads under the new condensing units, secure isolator pads to the existing concrete pad with flexible anchors. The contractor shall remove the existing wall mounted transfer grill between rooms 110 – 117 and fill in with 8" X 16" CMU block to match the existing wall construction. The contractor shall coat and paint repaired wall to match the surrounding wall color and install conduit and control wiring for the room thermostats for each new computer room unit. The contractor shall coordinate with the building manager for the locations of each new thermostat/humidistat.