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40154B-006
Verify your unit's model number on the data plate
Compatible with high-capacity Copeland scroll motor-compressors from 7
Multi-Switch Precision: The 4-switch configuration allows for staging up to four separate heating elements or fan circuits
McDonnell & Miller 157S-RLS-MD Control 30067439-890 40154B-006The McDonnell & Miller 157S RLS MD (Part Number 177251) is a high performance mechanical combination low water cut off and pump controller designed for commercial and industrial steam boilers. Engineered for high pressure applications up to 150 psi, this unit features a maximum differential operation that effectively prevents nuisance burner shutdowns in systems experiencing rapid water level fluctuations. Its integral water column design simplifies
