Question about Fairbanks Ace 1 Horsepower Convertible Deep Well Jet Pump (ACE10C)

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My jet pump has a 20 - 40 pressure switch but won't give any more than 30 psi. Whats wrong?

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There are several causes for this to occur.
1. If it is a 20-40 switch right out of the box it may not be set correctly. I have had this happen. If it builds to 30psi and shuts right off without straining to build to 40psi adjust the Cut-Out pressure up to 40psi. There are two different adjustments on a well switch. One for Cut In / Cut Out psi and one for Cut Out psi.
2. Lack of head pressure being built by the pump can be the cause. This can be attributed to the wrong Jetting in the pump. IE: A shallow well jet/venturi on a deep well.
3. The pump may have a bad impeller, but the pump will generally really strain to build pressure and a bad impeller will be loud, like grinding at times.
4. Double check the pre-set pressure in bladder tank also.
RJ

Posted on May 30, 2011

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I have a new 1 hp utiltech pump and a new. Precharged tank with 34 psi in it now. When i prime the pump the pressure goes right to 25 psi and i can hear some water moving . When i open the shut off valve...


The 34 psi of the pressure tank sounds high, but it depends on what the cut-in pressure is set at in the pump pressure switch. Typically the pressure switch is for 20-40 psi or 30-50 psi. To establish what the pre-charge of tank should be , you need to establish what the pressure switch setting are (i.e 20 - 40 psi , etc.) Run the water and watch the pressure gauge and note at what pressure the pump comes on. The pressure tank needs to be pre charged 2 -4 psi below that cut-in pressure. So if the cut-in pressure is say 30 psi, then the tank needs to be pre charged to 28 psi.
To pre charge the pressure tank, turn the pump off. Drain the pressure tank of water to relieve all pressure in the tank. Then check the pressure of the tank at the air valve. Set the pressure to 2 psi below what the cut-in pressure is.
If you adjust the pressure switch, say from 20-40 to 30-50, you will need to go through the procedure of re adjusting the pressure in the tank. I hope this helps....

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The water pressure is adjusted with the pressure switch, which turns the pump on and off. The pressure switch is typically set for a cut-in and cut-out pressure of 20-40 psi, or 30-50 psi. Usually there are adjustment directions on the inside of the switch cover. But, there are several other factors that may affect the house pressure. If there is a pressure tank that is pre-charged, the tank pressure may need to be reset, or the tank bladder may be ruptured. Have the entire system checked out.

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The pump pressure switch should be checked to see what the ON-OFF pressure is set at. Typically the pressure switch is set for 20-40 psi, or 30-50 psi. The pressure tank should be purged as well. With the pump OFF, and the tank drained of water, the air valve on the tank should read approximately 2 psi below the "on pressure". So if the system operates at 20-40, the tank should be pre-charged to 18 psi. If water escapes from the air valve, the internal bladder in the tank is ruptured, and the tank needs to be replaced. A tire air gauge is used to measure the pressure in the tank after the water is emptied from the tank.. A tire air pump or a compressor is used to charge the tank. if a compressor is used, be careful not to over-inflate the tank, as this may cuase the bladder to rupture.

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PUMP JUST RUNS AND WONT SHUT OFF MQ3-45


DOES THIS SYSTEM FEED YOUR HOME.DOES IT HAVE PSI TANK. WHAT COULD BE HAPPENING.IS.THERE IS A PRESSURE SWITCH (fyg-2) THAT WAS INSTALLED ON YOUR SYSTEM. THIS ITEM, DEPENDING ON IT'S MANUFACTURE.COME PRESET AT 20/40 PSI OR 30/50 PSI OR 40/60 PSI. THAT MEANS ON START/OFF START PSI. SO IF YOUR PUMP CONTINUES TO PUMP AND WON'T TURN OFF.YOUR SYSTEM PUMPS MAY HAVE SOME WEAR TO IT OR A POSSIBLE HOLE IN THE DROP PIPE THAT IS NOT ALLOWING YOUR SYSTEM TO REACH PSI THAT IT SET FOR. ALL U HAVE TO DO IS READJUST THE PRESSURE SWITCH TO THE PSI READING THAT IS ON PSI GAUGE.

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Hey, I just had a Flotec Series FP4300 installed for my well and the manual says that it should go to 50psi and turn off, but the pressure gauge stays at 30psi and does not go any higher so it just keeps...


http://www.depcopump.com/datasheets/flotec/FP313-EN.pdf
Maybe your check valve is letting water go back down the well.

Troubleshooting steps pg 13 in manual list several things.
Check air valve for leaks.
Flowtec has a customer service number:
1-800-365-6832

The manual says: "Your new pump has a 30/50 PSI
switch, so adjust the tank pre-charge pressure to 28 PSI.:
But the manual does not say or show how to adjust pre-charge pressure.
The 30/50PSI means the pump turns on when pressure falls to 30, and then runs until pressure rises to to 50. So the switch is preset and not adjustable.

geno_3245_25.jpg

Nov 09, 2010 | Flotec Electrical Supplies

1 Answer

My pump builds pressure to 60 psi but will not go any hire for the shut off what can be the problem


most jet pumps have a pressure switch to regulate cut in/ cut off pressure. Normally 40/60 psi. The pressure switch should be located at the rear of the pump where the wiring enters. First disconnect the power supply to the pump. Remove the cap where the wiring enters. On the inside of the cap there should be a diagram showing how to alter the cut in/ cut off pressure.

Jun 13, 2010 | Jet Plumbing

1 Answer

Problem with Convertible Jet Pump 3/4HP RedLion - drawing water 300' from lake to cabin - when the pump is on it holds 50# pressure by itself but when tap is turned on the pressure drops to 30# then you...


If I understand you correctly this is what you have:

- A pump that draws water from a lake 300 feet from lake to your cabin (I assume the pump is at the cabin)

- The pump kicks on to maintain pressure in a tank that distributes water to faucets in the cabin. The pump only turns on to pressurize the tank when water is being used (I am assuming).

- When you turn on tap, pressure in the pressure tank drops to 30 psi, then you hear water sucking from the tank to tap and flow stops at tap. Then the pump finally kicks back on and pressures tank to 23 psi.

- The pump is not used regularly.

If water flow stops when the pressure tank is reading 25 psi, then likely the real pressure is 0 psi and pressure gauge is reading wrong. If this gauge is tied into a switch that starts and stops the pump, then this is probably your problem. You may have partial blockage in your pressure gauge/switch that is causing gauge to move too slowly to keep up with the actual pressure changes when water is being used. Ore the pressure gauge/switch may be broken. Pressure gauges are notorious for reading pressure when there is none. If you can unplug the pump and disconnect the pressure gauge/switch and check for blockage in the ports you should start there. You mentioned that this worked good for the last two summers, if if sits unused for long periods, it could promote bio-growth, rust and/or sediment in the connection to the pressure gauge. If you find blockage, remove it and flush it out. Reinstall the pressure gauge/switch and try it again.

One other possibility is clogged strainer(s) / filter(s) in the water lines. It would not hurt to pull and check/clean any strainers / filters in the system including before the pump. I would even check at the lake for a strainer where the water enters the suction line to the cabin.


I would not assume that the pump is the problem yet.

Hope this helps.


May 01, 2010 | Plumbing

2 Answers

Shallow well pump cycles on and off quickly? Stays on while water is running than shuts off when valves are closed.


Do you have a tank in this system? If you don't, this is the way the well pump will operate.

If there is a tank, it will have a pressure switch on it which controls the pump -- it'll cut the pump on when the tank pressure drops to 28 psi, and cuts the pump off at 40 psi.

If you have a tank, the pump behaving as you describe indicates there is something wrong -- need more info.

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