pressure switch. Adjust the nut up or down depending on which way you want to move it to get the cut-on to be at 40 psi. Square D with lever, has 2 posts for adjustment, the center proudest stud for Range"turn nut down for higher cut-in, or up for lower cut-in. If the cut-off or cut-on pressure needs to be changed, follow the procedure below. One-Post Pressure Switches These allow adjustment of the cut-on and cut-off pressure at the same time. It will be either 20-40, 30-50 or 40-60 PSI. The following are the instructions for resetting the switch, assuming your pressure switch is a Square D Pumptrol Model FSG-2-M4, an extremely common switch (pictured below): If you decide to remove and replace your Square D pressure switch, you have to check the pressure range of your old switch. Although Pumptrol pressure switches are generally reliable, sometimes problems can develop with the switch or with the associated water system. Square D Pumptrol pressure switches are commonly found in many commercial and residential plumbing applications that require the regulation of water pressure. Precharge is always set with water pressure=zero. If you are a homeowner, whether you have your pressure switch set at 30/50 or 40/60 is a matter of personal preference. Adjusting the Square D well pressure switch increases the water pressure through the entire house. Prior to adjusting the switch, follow safety precautions and look for any faults in the switch components. Captive cover screw. ... well I adj.the tank psi to 28 per a 30/50 sw. and would like to at least try the 30 cut-in....then an extra 5 for the heck of it. These instructions cover one-post and two-post switches. Adjust a Square D well pressure switch by turning it clockwise to raise the pressure and counter-clockwise to decrease the pressure. My recollection was that the little adjustment nut fell off long before I obtained a change of 7 or 8 pounds. Just adjust the … Standard action contacts. I set my pressure switch to 38/58. You should no need to adjust the short nut, that’s the differential and is factory set at 20 lbs… let it be. You can find this information under the cover, which can be pulled off. Low The pressure switch is typically pre-set correctly for the application. Maybe 36 or 37 with a jet pump. I have tinkered with the regular Square D Pressure Switches and moved the control points as much as 5 or 6 lbs; but I don't think you can change a 30/50 to a 40/60 because the springs are of different strength. Turn the 3/8 nut on the big spring 3.5 turns clockwise. Check the result. I couldnt believe my eyes! Maximum pressure 220 PSIg. Adjust the long thread nut in the pressure switch to the right to increase pressure (each complete turn should increase the pressure about 1-1/2 lbs.) The common settings are either 30/50 or 40/60. However, if the well runs dry while the pressure tank is being filled, the switch may not shut off the pump. The well pressure tank was upgraded from Well-X-Trol WX-202 to WX-203 and the Square D pressure switch was upgraded from 30/50 to 40/60 w/ automatic low pressure cut-off. For example, at 40/60 the pump will turn on when system pressure reaches 40 psi (pounds per square inch) and turn off when system pressure reaches 60 psi. Suitable for jet pumps, submersible pumps and reciprocating pumps. The Square D by Schneider Electric pressure switch works with jet pumps, submersible pumps and reciprocating pumps and the 30-50 PSI pressure switch features a 1/4-in pressure connection. The industry standard for controlling electrically driven water pumps. The regulation of water pressure through the entire house plumbing applications that require the regulation of water.! 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