How can i adjust the pressure - Northstar Pressure Washer 3000 PSI

Adjust pressure
http://waterheatertimer.org/images/Pressure-switch.jpg

Use 3/8" wrench
Turn power off
Remove cover
There are two locknuts
Center nut screwed inward raises pressure... water well will cut off at higher pressure
Left-side nut adjusts range between cut on and cut off pressure

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

The purpose of the pressure switch is to verify the pool pump is operating properly and water pressure is present in the heating chamber. When water pressure is not present, the heater control system is designed to not allow initiation of flame. The pressure switch is preset at the factory for deck level installations. When the heater is located below the level of the spa or pool, the pressure switch may require an adjustment to compensate for the no-flow static head.

CAUTION: The Hayward Pool Heater is essentially a furnace. A trained technician should be consulted to repair it. DO NOT OPERATE the Hayward Pool Heater without a properly functioning and calibrated water pressure switch. The pressure switch adjustment requires both the pool pump and the heater be operational. As a result, extreme caution should be used during this procedure since sources of energy can not be isolated during the procedure.

The following procedure is recommended to calibrate the pressure switch.

1. The water pressure switch is located behind the front service panel. The pressure switch is typically on the left side, above the burners.
2. Be sure the water filter is clean before making the adjustment.
3. With the pump and heater system switch on, carefully turn the pressure switch adjustment dial clockwise, until a click is heard from the gas valve.
4. Turn the adjustment dial counterclockwise 1/4 turn.
5. Turn the pump off and on several times. The heater should shut off immediately when the pump is shut off. If the heater fails to shut down when the pump is off, repeat the steps above until the pressure switch is properly adjusted.
6. If the adjustment process fails to produce proper results the pressure switch should be replaced.

pressure control valves are non adjustable
They operate to unload the pump when the trigger is released
What can vary pressure is the jet size at the end of the wand
The screw and nut on the valve is only to regulate the stop/start pressure as the trigger is pressed/ released
low pressure at the wand jet can be from low water supply to the pump or pump internal problems

the pressure switch has adjustments for both cut off pressure and cut in pressure.

Unfortunately you didn't give the complete number. There should be 3 more numbers like J15 etc. Anyway, remove the cover. Use a nut-driver and adjust the large nut for the CUTOUT pressure. If your turn the nut clockwise (tighten or turn it in) it will increase the cutout pressure. If you turn it counter clockwise (loosen or turn out) it will lower the pressure. This the pressure that will turn the unit off. If your model has an adjustable differential, it will be the smaller nut. This will be the CUT IN pressure. It will adjust the same as the other adjustment.

http://www.schneider-electric.us/products-services/product-detail/?event=productDetail&partNumber=9013GSG2J15&countryCode=us

Square d recommends that the pressure switch be adjusted to specifications of the particular switch (which is sold in pressure ranges preset at the factory). The switch will be erratic it adjusted out of the factory setting range.
From Square D: (adjust the desired cut-in pressure first, then cut-out)
Cut-in: The large spring controls the cut-in pressure. To make adjustments, turn the nut clockwise (compressing the spring) to raise the cut-in point or counterclockwise to lower the point of cut-in.
Cut-out: The small spring is the differential adjustment and controls the cut-out pressure. To raise the cut-out pressure turn the small nut clockwise (more differential); to lower the cut-out pressure turn counterclockwise.

Replace the pressure adjuster and everything will work. When you lose pressure and the adjuster is not adjusting to allow more or less then you need to replace it. It has a valve in there that is most likely broken and the valve is not opening and closing anymore.

Please rate

most air compressors have a pressure switch on them.this is used to adjust the desired pressure you want to reach.the second adjustment is for setting the pressure for when you want it to cycle back on.lets say you want it to run at 100 PSI.one of your adjustment in this box will control this , when you are using the unit and the pressure starts to drop to lets say 90 PSI you can adjust the unit to cycle

Hi, W/D here.

To accurately test a switch, it has to be removed from the compressor and tested by raising the pressure and lowering it with air supplied from a known, good regulator. The trip pressures are then noted and adjusted.
The quick and dirty way of "getting close enough" is a little different. Start the compressor, and when it gets to your desired cutoff pressure, pull the plug. Adjust the HP spring untill the contacts trip out. Now, with the compressor still unplugged, drain the pressure off of the tank until you reach your desired cut in pressure, and close the valve. Adjust either the LP cut in or the differential pressure adjustment to set the cut in pressure. The contacts will pull in. If you adjust the cut in pressure with the diff pressure setting, the cut out pressure has to be challenged and set again. Whichever method you follow, you always need to check the upper and lower settings after each adjustment.
Best regards, --W/D--

Generally, the pressure switch is not adjusted more than once or twice in the life of the compressor since the discharge pressure can be adjusted with pressure regulator. However the life of the compressor can be increased if lower pressure settings are maintained. Your pressure switch was set at the factory to a setting of about 120 - 150. If your cutout pressure is higher than 150 surely lower.
STEP 1: Turn Main Calibration Screw ( center screw with large spring) clockwise to increase pressure and turn counter-clockwise to decrease pressure.

STEP 2: Turn Differential Pressure Screw (small spring) clockwise to decrease cut-in pressure and
turn counter-clockwise to increase cut-in pressure.

Differential Pressure is defined as the difference between cut-out and cut-in pressure. There should be about 7 to 12 psi difference between cut-out and cut-in.
In our shop we rarely adjust more than a couple of turns because these switches are sensitive.
Good Luck and please post again if you have other concerns about your compressor.