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sharing the same face-to-face dimensions for straightforward replacement
The McDonnell & Miller 94-A includes 1-1/4" NPT alternate tappings located on the side of the casting
Are the seals in this rebuild kit compatible with all fluids
Reversing rotation will significantly degrade airflow and may lead to compressor overheating
this board is designed to interface seamlessly with existing system components
Lochinvar & A.O. Smith 100189284 Control 321894-709 sharing the same face-to-face dimensionsThe Lochinvar & A. O. Smith 100189284 Control is a critical OEM replacement integrated control board engineered specifically for Fire Tube (FTXL) heating boilers, including the FTX850, FTX850L, and FTX850N models. As a veteran technician knows, the SMART SYSTEM control module is the "brain" of the hydronic system, managing flame ignition, burner modulation, and essential safety circuit checks. This board processes real time data from outlet