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The integrated internal relief valve (IRV) offers critical overpressure protection
Key Benefits: Precise Flame Rectification: Delivers accurate microamp feedback to the control module for instantaneous flame verification
it can technically serve as a universal backing plate
This specific high limit is primary for the Ultra Oil (UO) series boilers
Durable Construction: High-grade synthetic rubber resists fatigue and environmental degradation in mechanical rooms
Carrier HH12ZZ165 Limit Switch 323055-751 The integrated internal relief valveThe Carrier HH12ZZ165 Limit Switch is a critical OEM safety component engineered for precision thermal monitoring in HVAC furnaces and industrial heating systems. As a fixed temperature L165F 40 limit control, this switch features a normally closed (NC) circuit designed to open on a temperature rise at its 165F set point, effectively preventing heat exchanger damage. With a 40F differential, the automatic reset engages when the internal temperature
