Lochinvar & A.O. Smith 100277940 Board 321702-401 Always verify the amperage and

Always verify the amperage and voltage rating on your specific wiring diagram before installation

Common Questions Is this a spring-return or non-spring return actuator

using incorrect voltage will cause immediate coil failure or fire hazard

making it suitable for standard commercial electrical grids

Common Questions Is the RST64C1E-CFA-959 compatible with the older RS64C2E-CAA-959

Lochinvar & A.O. Smith 100277940 Board 321702-401 Always verify the amperage andThe Lochinvar & A. O. Smith 100277940 Board is a critical low voltage connection board engineered for precision signaling in high efficiency heating systems. Specifically designed for the Knight KH055 285 fire tube boilers, this OEM replacement part serves as the central communication interface between the main controller and auxiliary system components. As a veteran technician knows, maintaining signal integrity in commercial water heating