McDonnell & Miller 93-7B-HD Pump Controller R-410A Always refer to the nameplate

Always refer to the nameplate wiring diagram to ensure correct rotation and phase balance

This HVAC blower wheel replacement provides the exact geometry needed for high-efficiency heat exchange and consistent airflow across the evaporator or heat exchanger

This replacement blower motor is critical for restoring system static efficiency and preventing limit switch tripping caused by insufficient CFM

reducing vibration and extending the service life of the blower motor

providing the necessary rigidity to handle high RPM operations without deformation

McDonnell & Miller 93-7B-HD Pump Controller R-410A Always refer to the nameplateThe McDonnell & Miller 93 7B HD (Part Number 163200) is a high performance head mechanism only designed for direct replacement in Series 93 and 193 boiler water level controls. This heavy duty unit integrates a low water cut off and pump controller, specifically engineered for industrial and commercial steam boilers. Featuring a No. 7B potentiometer switch, it provides a 135 ohm proportional signal for modulating feed water valves, ensuring precise