Carrier 50HJ680050 Economizer Controller 320788-703 With inside dimensions of 7-1/16"

With inside dimensions of 7-1/16" L x 4-1/8" H x 2-1/4" D for the ring base

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The BQC-AAA is specifically for use with Sporlan’s 3-piece valve series

The Daikin-McQuay 049121701 Fan Blade is a precision-engineered OEM replacement condenser fan designed for high-performance heat rejection in commercial and residential HVAC units

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Carrier 50HJ680050 Economizer Controller 320788-703 With inside dimensions of 7-1/16"The Carrier 50HJ680050 Economizer Controller is a critical OEM replacement component designed for vertical mount configurations in high tonnage commercial rooftop units (RTU). As a primary logic module, this device automates free cooling by precisely modulating damper actuators based on real time mixed air and enthalpy sensor data. By prioritizing outdoor air intake when ambient conditions are favorable, the 50HJ680050 significantly reduces the load