Mcdonnell Miller 7B Manual. Web replacement head mechanism with switch assembly: This switch features a single pole.
Order online now from boilerwarehouse.com. Combination low water cut off and pump controller with potentiometer switch for steam boilers with 250 psi max pressure (part number. Continue with verification procedure to determine operation.
1 Single Pole, Double Break Switch.
Web replacement head mechanism with switch assembly: Web mcdonnell & miller model number 7b is an automatic reset proportioning switch assembly for model number 93, 193, 94, and 194 controls. Order online now from boilerwarehouse.com.
Combination Low Water Cut Off And Pump Controller With Potentiometer Switch For Steam Boilers With 250 Psi Max Pressure (Part Number.
Slowly lower boiler water level. This switch features a single pole. 7b switch (135ohm proportional control signal) to maintain constant boiler water level;
Continue With Verification Procedure To Determine Operation.
Web if pointer is on white insulator, the 7b switch may have been adjusted in the field. Order online now from boilerwarehouse.com.