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and Johnstone Supply components
it features a standard frame size and shaft configuration for direct-fit replacement
and other fuel gases typically found in commercial heating applications
Frequent tripping often indicates a downstream short in the transformer
McDonnell & Miller 7-BM Switch 30067439-890 and Johnstone Supply componentsThe McDonnell & Miller 7 BM Switch (Part Number 110900) is a heavy duty, potentiometer proportional low water cut off switch specifically built for Series 93, 193, 94, and 194 pump controllers. Designed for boiler systems requiring modulated feedwater control, this manual reset switch utilizes a 0 135 ohm slide wire resistor to provide a continuous signal to a proportional domestic or industrial modulating water valve. The single pole double break
