Mcdonnell Miller 7B Manual. Combination low water cut off and pump controller with potentiometer switch for steam boilers with 250 psi max pressure (part number. Web if pointer is on white insulator, the 7b switch may have been adjusted in the field.
McDonnell & Miller 1937B Pump Controller w/ Water Column Products BoilerWAREhouse from www.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. Web mcdonnell & miller model number 7b is an automatic reset proportioning switch assembly for model number 93, 193, 94, and 194 controls.
This Switch Features A Single Pole.
Order online now from boilerwarehouse.com. 7b switch (135ohm proportional control signal) to maintain constant boiler water level; Slowly lower boiler water level.
1 Single Pole, Double Break Switch.
Order online now from boilerwarehouse.com. Web replacement head mechanism with switch assembly: Combination low water cut off and pump controller with potentiometer switch for steam boilers with 250 psi max pressure (part number.
Web Mcdonnell & Miller Model Number 7B Is An Automatic Reset Proportioning Switch Assembly For Model Number 93, 193, 94, And 194 Controls.
Web if pointer is on white insulator, the 7b switch may have been adjusted in the field. Continue with verification procedure to determine operation.
