Weil McLain 510-312-167 Transformer Els PW 17895 Cores should be replaced whenever

Cores should be replaced whenever a pressure drop across the shell exceeds 2 PSI at full load or after any system breach where the internal components were exposed to atmospheric moisture

Always check for a grounded "C" wire

saving valuable time on the job site

providing a clear indication that the control relay is energized

Repairing a unit heater requires precise safety components

Weil McLain 510-312-167 Transformer Els PW 17895 Cores should be replaced wheneverThe Weil McLain 510 312 167 is a mission critical combination transformer and DPST relay assembly designed for seamless integration into Weil McLain boiler control circuits. This factory spec component serves as a robust 120 24 volt step down transformer, providing a consistent 40 VA power rating to drive low voltage ignition systems, zone valves, and auxiliary controls. Engineered for high demand hydronic environments, the 510 312 167 relay assembly