This contactor uses a 24VAC control circuit coil

Key Benefits Precise Thermal Protection: Features a fixed 185°F trip point to safeguard the heat exchanger from excessive thermal stress

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

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

What does the 'NoPP' designation mean for my installation

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