J--HVAC Units Replacement w/Connection to Siemens Building Automation System, Currently in Place at the Station.

Contractor shall install 4 new HVAC units and controls and remove the old equipment and controls per the statement of work below: Contractor shall replace 4 existing attic HVAC units and corresponding rooftop condensing units serving the Building 5 Auditorium. Work shall be performed during normal business hours. All OSHAA and VA, NEC guidelines procedures to be followed including infection control procedures if needed. The General Contractor shall have on-site supervision during the performance of all work. Contractor shall replace 4 Chrysler Airtemp units in the attic of Building 5 with 4 Trane 10 ton Performance Climate Changers (Mod. UCCAA08AOC0EGU). Heating will be with a factory installed steam coils. Cooling will be DX, single stage. A new filter section shall be included. The Contractor shall install factory control devices, which shall include: low limit switch, condensate overflow switch, dirty filter switch, fan status switch, discharge temp sensor, mixed air temp sensor. Factory installed controls shall be wired to a terminal strip for use by controls contractor. New supply fan/coil/filter section shall be connected to the existing supply and return duct work. Existing duct work shall be cleaned and repaired as needed. Existing SA/RA/EA dampers shall be reused with new damper control actuators installed. Wiring shall be reconnected to both fan section and outside condensing units. Crane lift of the 4 old and new condensing units will be required. Crane lift plan and permits are required and shall be submitted to the assigned POC prior to performance of any type of service. The pneumatic controls shall be removed and replaced with 4ea Siemens PXC programmable controller connected to the campus wide BAS network. The 2 pneumatic thermostats in the auditorium will be replace with 2 blank electronic room sensors. Each sensor will control 2 or the supply units Contractor shall remove existing pneumatic controls (damper actuators, air compressor, steam valves controllers, PE, EP switches) and copper lines as much as possible. The Contractor shall install Controllers and connect new HVAC Units to existing campus-wide Siemens Building Automation System to include all wiring, engineering programming and graphics. Included controls: 4 Siemens PXC24 with Ethernet and LAN 16 Siemens electronic damper actuators, 0-10Vdc 4 Siemens Flowrite 1.5 steam valve with electronic actuator, 0-10Vdc 4 High temp detectors for fan shutdown 4 Enclosures, transformers, relays, and other materials Factory installed Trane devices shall be connected, wired, and programmed to the 4 controllers Controller programming and point database Graphics and programming and central mechanical plant and fire alarm system connection. Contractor shall remove 4 non-functioning line voltage Pyrotronics duct smoke detectors and dispose of properly, and seal duct penetrations. Contractor shall install Notifier FRN-1 relay on each existing notifier duct detector for supply fan shutdown and coordinate individual fan shutdown circuits with controls contractor and address and program relays into the existing Notifier fire alarm system. Contractor shall follow all OSHA, VA and NEC Guidelines and Regulations including Infection Control Procedures.

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