Low Water Cut-Offs – Electronic For Hot Water and Steam Boilers   Series 751P/752P • 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