Lochinvar & A.O. Smith 100208474 Connection Board 319852-301 extending the service life of

extending the service life of the existing valve body

Specifically designed for belt drive blower assemblies

as a Factory Authorized Part for the Carrier family of brands

the standard EX4-I21 is a uni-flow design

Lochinvar & A.O. Smith 100208474 Connection Board 319852-301 extending the service life ofThe 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,