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The Lennox 52M46 Control Board
Quiet Operation: Soft-start and variable speed transitions minimize the audible "thump" associated with system cycling
It explicitly requires a 1/4 inch motor shaft for installation
Flexible Mounting: The NEMA 1 enclosure adapts to standard 35mm DIN rails or flat surfaces for rapid installation in existing control panels
utilizing an integrated control module to translate system demands into specific torque and speed adjustments
Lochinvar & A.O. Smith 100144992 Fan Assembly 320720-756 The Lennox 52M46 Control BoardThe Lochinvar & A. O. Smith 100144992 Fan Assembly is a critical OEM replacement part designed for high efficiency commercial boilers and water heaters. This 115V blower motor assembly manages precise combustion air delivery, featuring a 1 2 HP motor balanced for high static pressure applications. Operating at a fixed 1650 RPM, it ensures stable manifold pressure and optimal heat exchanger performance. This unit is the direct manufacturer mandated