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Optimized Performance: Maintains the internal pressure required for efficient fuel-to-air ratios and peak boiler efficiency
The minimum position (MinPos) potentiometer allows contractors to set a fixed minimum opening for the damper
If the microamp signal remains low after cleaning
Always verify your capacitor rating matches the manufacturer's specification for this motor
for maximum service life and to prevent sediment buildup
McDonnell & Miller 51-2-HD Control Freon Optimized Performance: Maintains the internalThe McDonnell & Miller 51 2 HD is a heavy duty head mechanism only (Part Number 135100) designed specifically for field replacement on Series 51 2 mechanical water feeders. This unit is engineered for low pressure steam and hot water boiler applications, supporting systems with a maximum vessel pressure of 35 PSI. As a specialized low water cut off (LWCO) component, it features a snap acting SPDT switch that provides simultaneous feed control and
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