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If voltage is present but the load terminals fail to show continuity within the specified timing window—usually 1 to 110 seconds—the internal heater or bimetal disc has failed
Precise Pressure Regulation: High-accuracy pressure bellows provide consistent setpoint stability over the life of the component
Standardized Replacement: Specifically designed as the direct replacement for 4104-3
Constructed with a chrome metal bonnet and plastic handle to withstand the high temperatures of commercial hot water tanks
Always verify mounting dimensions before attempting cross-application
System Sensor WFD30N Detector R-410A If voltage is present butThe System Sensor WFD30N is a heavy duty vane type waterflow detector engineered specifically for integration into 3 inch schedule 10 through 40 steel piping systems. Designed for wet pipe fire protection and hydronic installations, this flow switch utilizes a durable polyethylene vane and a mechanical pneumatic retard mechanism to minimize false alarms caused by pressure surges or trapped air. With a static pressure rating of 450 PSI and a NEMA 4