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Optimized Combustion: Sustained 2900 RPM output maintains the negative pressure required for safe gas furnace venting
this board is designed to interface seamlessly with existing system components
Are the seals in this rebuild kit compatible with all fluids
Broad Compatibility: Replaces Alco EX6-I21 and 800620
Lochinvar & A.O. Smith 100189284 Control 321894-709 Optimized Combustion: Sustained 2900 RPMThe 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
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