Key Benefits: Compressor Protection: The ZP40 thermostatic charge prevents motor overload during startup by limiting suction pressure

also identified as the S1-8865B-1281

allowing technicians to map custom process variables such as temperature

the 410171002 may have failed contacts or a degraded thermal element

Engineering for precise flow control

Weil McLain 510-312-166 Relay 30067439-890 Key Benefits: Compressor Protection: TheThe Weil McLain 510 312 166 Relay is an indispensable OEM boiler replacement part specifically engineered for residential gas systems. This 120V to 24V step down transformer and relay receptacle combination delivers a stable 40VA power rating, providing the necessary current for spark ignition controls and external thermostat circuits. Designed for high performance switching, the DPDT relay configuration (Double Pole Double Throw) ensures reliable