Water Pump Pressure Control Switch Adjustment Nut Directions Which way to turn the large & small adjustment nuts • - CONTENTS: Which way to turn the pump pressure control switch adjustment nuts to adjust water pump cut in or cut off pressure or both. Solver Excel 2013. How to set the Range & Differential nuts on a typical pump pressure control switch using the Schneider Electric Square-D Pumptrol switch as an example.
Details of one-nut and two-nut pressure control switch settings. • about Setting the Water Pump Pressure Switch and Improving Water Pressure •. InspectAPedia tolerates no conflicts of interest. We have no relationship with advertisers, products, or services discussed at this website. How to adjust the pump pressure control switch using the Square-D Pumptrol™ as an example: This article 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.
Pressure Switches Type F and 9013 Commercial. Electromechanical Square D Brand 9013 For power circuits, FSG, FTG, FYG. Adjust the switching point on rising.
We explain which adjustment nuts to turn and in which direction to change pump cut-in pressure or cut-our pressure settings. This article series also includes information on how to adjust building municipal or community water pressure at a building. Which NUT the Pressure Control Switch Does What? Download Bitmap Converter For Lcd.
Range & Differential Adjustment on a Water Pressure Control Switch The (LARGER) RANGE Adjustment nut The larger nut ( green arrow) on the larger spring in the pump pressure switch: changes cut-in AND cut-out simultaneously moving them both up (higher pressure) or down (lower pressure). This is the range adjustment nut. [Click to enlarge any image]. It has the practical effect of raising or lowering the operating pressure range of the switch. So if your switch was running at 20/40 (on at 20 psi off at 40 psi), and you tighten this nut 3 1/2 turns, you'll increase both numbers so that the switch will now operate at 30/50 (on at 30 psi and off at 50 psi). Usually the larger nut in the pump pressure control switch (green arrow in our photo at left) adjusts the pump cut-on ('cut-in') AND pump cut-off pressures simultaneously.
This is the left-hand spring (and nut) in our photo and is pointed-to by the green arrow. That means that whatever the gap is between the cut-on pressure and the cut-off pressure, that gap is maintained, but the entire operating range of the pump is raised or lowered. Turning the large nut clockwise RAISES BOTH the cut-on and cut-off pressures. So turning the large nut clockwise shifts the whole operating pressure range of the pump UP to HIGHER pressures. Conversely, turning the large nut counter-clockwise will lower the whole pump operating range. This is the simplest adjustment to make. Photo (above left) courtesy of a reader.
Help in identifying the range and differential nuts • The range nut has a larger diameter spring • The differential setting adjustment nut is on the smaller diameter spring • The differential setting nut is usually on a shorter spring - it will be 'lower' or further down in the pressure control switch. You will see this in our photo above. • Some pressure control switches have only the range adjustment nut and no differential nut. • In modern pressure control switches both nuts are typically sized to be turned with a 3/8' nut driver or socket Effect of Nut Turns on Range Adjustment Here is an example of Range Nut Adjustment Settings & the Number of Turns Required, using the Square-D Pumptrol Class 9013F and G Pressure Switches as an example. Try the search box below or by email if you cannot find the answer you need at InspectApedia.