Plaza notes
Hard ruleDescription
This 150-45F limit switch functions as a high-limit safety
Rated at -0
If the sensor fails to detect a signal—often due to carbon buildup or a cracked ceramic insulator—it triggers a system lockout to prevent hazardous unburned gas accumulation
Since it is self-powered
rooftop units (RTUs)
Daikin-McQuay 073319801 Subbase Els PW 17895 This 150-45F limit switch functionsThe Daikin McQuay 073319801 Subbase is a critical mounting and wiring interface designed specifically for PTAC thermostat control integration. Engineered to serve as the hardware foundation for the Honeywell Q674E1460 subbase, this component facilitates seamless communication between the wall mounted thermostat and the HVAC unit's control board. It features a rugged terminal block architecture designed to handle standard 24VAC pilot duty circuits,
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