McDonnell & Miller 194-A-7B Controller 30067439-890 reducing setup time and ensuring

reducing setup time and ensuring immediate HVAC system integration

Technicians should check for continuity across the terminals when the switch is cool

it prevents nuisance shutdowns and short-cycling when entering a heating cycle in low ambient temperatures

replacing 56W68

McDonnell & Miller 194-A-7B Controller 30067439-890 reducing setup time and ensuringThe McDonnell & Miller 194 A 7B (Part Number 167100) is a heavy duty combination low water cut off and pump controller engineered for commercial and industrial steam boiler applications. Designed to handle a maximum pressure of 250 PSI, this unit integrates a high performance potentiometer switch to provide a proportional 135 ohm signal, ensuring a constant water level is maintained regardless of varying steaming rates. As a veteran grade float