Low Pressure Cutoff Switch Adjustment

In brief tutorials we explain how to set and adjust a typical pump pressure control switch.

Low pressure cutoff switch adjustment.

If system pressure is lost for any reason a low water condition for example the automatic lower pressure water cut off feature will open the contacts turning off the pump. The switch is preset with both the cut on and cut off pressure. You can adjust the differential by turning the short adjusting nut on the pressure switch clockwise to increase or counter clockwise to decrease the differential it s seldom required and i suggest you not tamper with this setting unless you know what. How to adjust the pump pressure control switch using the square d pumptrol as an example.

Square d pumptrol pressure switches are manufactured by schneider electric. We explain which adjustment nuts to turn and in which direction to change pump cut in pressure or cut our pressure settings. Starting here with advice about correct problem diagnosis of water pressure problems this article series describes how to adjust building water pressure by setting the water pump cut in and cut out pressure on the well water pump pressure control switch. How to set the pump pressure control switch.

One for the cut in pressure and one for the cut out. If the cut on cut off is 40 60 psi is what the factory setting is on the pressure switch. For the switches with an adjustable pressure differential there will be two setscrews. The cut on pressure is the low pressure that starts the pump and the cut off pressure is the high pressure that turns off the pump.

Make sure you have unplugged the air compressor and remove the cover off the pressure switch. A 20 psi differential is standard and recommended. Steps to adjusting the air compressor pressure switch.