This contactor uses a 24VAC control circuit coil

NEMA 3R Protection: Weather-resistant housing allows for outdoor installation and protects against condensation

this socket assembly eliminates compatibility guesswork and maintains the original engineering specifications of your legacy Barber Colman infrastructure

If your system uses a glowing silicon carbide or nitride igniter directly for the main burners

matching the 115V electrical footprint and 3

Lochinvar & A.O. Smith 100157702 Control 320819-301 This contactor uses a 24VACThe Lochinvar & A. O. Smith 100157702 Control is a critical outdoor air reset control designed to optimize the performance of hydronic heating systems. Engineered for precision, this high efficiency boiler control board (compatible with Lochinvar Copper Fin and Solution series models CB045 through CB500) automatically modulates the system's water temperature based on real time ambient conditions. By adjusting the supply water setpoint, it prevents