Combination float-operated high-pressure low water cut-off and pump controller with maximum differential operation, which prevents nuisance burner shut-down in low pressure applications, for steam boilers with a separate water column. This control features an automatic reset with two 120 volt bi-metal snap switches. One switch is single pole, single throw for pump control. The other is single pole, double throw for low water cut-off and alarm actuation.
|Manufacturer||McDonnell & Miller|