BEH S 025 AHU 1 System Upgrade

The work of this project consists of Basement HVAC System improvement is as follows: Replace existing 2 pneumatically controlled VAV terminal units with re-heat coils with new Direct Digital Control (DDC) controlled single duct Variable Air Volume (VAV) terminal units with reheat coils, control module, and reheat hot water control valve. • Revise existing ductwork as necessary for the installation of the new VAV terminal units. • Replace pneumatically controlled space temperature sensor with new DDC temperature sensor wall mounted at ADA height for spaces with an expected occupancy of 5 people or less. For all other spaces, replace pneumatically controlled space temperature sensor with new DDC combined temperature and CO2 sensor at ADA height. • Replace the existing outside air, return air, and relief dampers with new dampers and automatic DDC actuators. • Provide new outside airflow stations in both the minimum outside air and economizer duct sections. • Replace the existing AHU DDC control panel to incorporate the new control devices. • Install a 2-way automatic temperature control valve at the AHU chilled water piping. • Revise AHU sequence of operation to meet ASHRAE Guideline 36-2018 trim and respond control based on VAV terminal unit input. • Install VFD drives on the building chilled water pumps. • Install VFD drives on building heating water pumps. • Provide all-new control panels and control devices for new equipment necessary for a fully integrated DDC system that can report back to the campus BAS.

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