McDonnell & Miller 193-A-7B Controller R-22 Lockout models shut down the

Lockout models shut down the system after a set number of failed attempts for safety in specific environments

Always check the primary voltage matching before energizing

60" WC set point for factory-standard safety performance

while optimized for water pilot operated service

McDonnell & Miller 193-A-7B Controller R-22 Lockout models shut down theThe McDonnell & Miller 193 A 7B (Part Number 164500) is a robust, float operated combination low water cut off and pump controller specifically engineered for commercial and industrial steam boiler applications. Designed to handle a maximum pressure of 150 PSI, this unit integrates a No. 7B potentiometer switch, which provides a 135 ohm proportional control signal to maintain a constant boiler water level by modulating the feed valve. Unlike standard