Lochinvar & A.O. Smith 100208474 Connection Board 319852-301 Quiet Operation: Integrated sleeve bearings

Quiet Operation: Integrated sleeve bearings reduce vibration and noise transfer through the ductwork

the standard EX4-I21 is a uni-flow design

as a Factory Authorized Part for the Carrier family of brands

extending the service life of the existing valve body

Specifically designed for belt drive blower assemblies

Lochinvar & A.O. Smith 100208474 Connection Board 319852-301 Quiet Operation: Integrated sleeve bearingsThe Lochinvar & A. O. Smith 100208474 is a critical low voltage connection board designed for seamless integration with Lochinvar Knight WB51 WB211 series wall mount boilers. As an authentic OEM boiler control interface, this component manages the essential signal pathways between the primary control logic and external system accessories. Technicians recognize this board as the central hub for terminal connections, ensuring that thermostat calls,