Mcdonnell & Miller 750-T-120, GuardDog Electronic Reset LWCO for Hot Water & Steam Boilers (Automatic)

For commercial or industrial applications Primary or secondary control on hot water boilers Secondary control (manual reset models only) on steam boilers Manual reset models meet the requirements of ASME Standard CSD-1. If the control is in a low water condition when there is an interruption of power, the control will remain in a low water condition when power is restored. The reset button will need to be pressed when the water level is restored to a level above the probe to allow the burner to fire. Standard Features: Green power in on indicating LED Red low water indicating LED Test button No lock out with loss of power if probe is in water 20,000 ohms sensitivity