Weil McLain 510-312-166 Relay 30067439-890 it must be mounted with

it must be mounted with the diaphragm in the vertical plane

and oil-free instrument air to prevent internal clogging and ensure consistent switching performance

it prevents motor overheating and reduces excessive amp draw on 115V or 208/230V circuits

preventing stagnation and rust on internal metal components

While the 10-410 series can be factory-preset between 20 and 80 PSI

Weil McLain 510-312-166 Relay 30067439-890 it must be mounted withThe 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