Weil McLain 510-312-167 Transformer Els PW 17895 B) correspond directly to the

B) correspond directly to the lettered and numbered terminals on original RLY02807 and RLY02257 boards

Repairing a unit heater requires precise safety components

standard base units may require external scale plates and covers to be ordered separately

this York genuine part delivers consistent performance across varying duty cycles

Always check for a grounded "C" wire

Weil McLain 510-312-167 Transformer Els PW 17895 B) correspond directly to theThe 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