Lochinvar & A.O. Smith 100304140 Control Board R-22 For pressurized or corrosive applications

For pressurized or corrosive applications

Field technicians value this unit for its standardized suction and discharge port locations

Smith communication protocols

ensuring the heat exchanger is protected against overheating conditions caused by airflow obstructions or blower failure

This is the individual Honeywell 313745 replacement diaphragm

Lochinvar & A.O. Smith 100304140 Control Board R-22 For pressurized or corrosive applicationsThe Lochinvar & A. O. Smith 100304140 Control Board is a critical main control board designed for high efficiency Knight Fire Tube boilers, specifically the WHB285 and KHB285 models. As a central component of the SMART SYSTEM operating control, this board manages complex hydronic functions, including 10: 1 turndown ratio modulation, blower speeds, and gas valve timing. It effectively processes real time data from water temperature sensors and flame