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the high and low ports are reversed
provided the correct orifice is installed for your specific gas application
combustion efficiency
The CCW rotation and sleeve bearing construction are optimized for HVAC condenser fan applications where thermal protection and steady airflow are critical
the 634686 wire harness is used extensively across Intertherm
Tjernlund Products UC1 Interlock Controller 322057-301 the high and low portsThe Tjernlund UC1 Universal Interlock Control is an essential component for technicians managing draft inducer and power venter installations. This interlock controller acts as the central logic board, coordinating the sequence of operation between the HVAC appliance and the venting system. Designed for 24VAC, 115VAC, or dry contact call for heat signals, the UC1 features a pre purge and post purge cycle to ensure proper combustion gas evacuation.
