Question about AO Smith Pool Pump Motor 1HP Square Flange Swimming Pool Pump Energy Efficient motor

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We have an 1hp jet pump pulling water from a 3000gal holding tank below the pump and pressure tank. when we prime the system and bleed out the air the irrigation works properly, the pump starts and stops fine, the pressure tank fills with water and the pressure switch properly shuts down the pump. Although when we leave the system for over 12 hrs or till the next cycle the pump blows the cirrcuit breaker on the panel upon start up. We have a foot valve and check valve in the holding tank on the suction line and removed the check valve between the pressure tank and pump so the whole system should stay primmed even if there is a small leak possibly. Why would everything run fine for one cycle and then blow the breaker after it has been sitting. It is wired so the pump and the pressure tank are on seperate cirrcuits from the irrigation controller, therefor any leaks that may persist will drain the pressure tank to its lowest setting and the pump kicks in and fills it back up, but this is not the case.

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Depending on the motors style of start-up, if you have a centrifugal type of start winding switch, your motor may be trying to start on the run winding due to a defective contact on the centrifugal switch, if it is a capacitor type starer, you might have a defective capacitor once again the motor is trying to start on the run winding, a way to find out is to be there and listen to the motor when it tries to start and trips the barker, if the motor emits a loud humming noise you have a fault with the start-up winding control device, if the picture supplied with your post is correct the capacitor is the long cylindrical thing at the top of the motor, you can remove this and bring it to a motor shop, they can test this for you

Posted on Apr 28, 2010

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Posted on Jan 02, 2017

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My 8 Yr old 1hp jet pump model JRD10 cycles on and off when i try to use hose at facuet?


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2. holding on the the other end of the vac. hose so it doesn't get away from you. slowly lower the the set up into the pool and make sure the pole doesn't get away from you either.
3. now you will notice part of the hose is filled water and part of it is floating ontop of the water with air still in it. Now while sitting on the edge of the pool, pull the hose toward you to where you think the part of it is now full of water. than slowly feed the rest of the hose, hand over hand until the end of the hose and you will see water come out the end, the hose is now totally full of water.
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Had to replace shallow well pump. Bought jet pump (used to have centrifugal pump), and installed it. Had to replace inline check valve, losing well prime. Priming pump does not accomplish the job. ...


Hi,
Aj, do you have a foot valve on the bottom of the pipe in the well?? The jet pump needs to have a foot valve to hold the water in while priming it... you also have to carefully design the system and prime it in such a way as to eliminate all of the air in the piping. A jet pump will not pull the water and expel the air like a centrifugal pump will...

I think the part you are missing is the foot valve...

heatman101

Jun 09, 2011 | Garden

1 Answer

Hello,


The pressure tank psi may be too high. To set it you get the system to pressure up and stop then check that water pressure. Whatever that is, is what the tank should be set at. Too much air pressure and the water pressure will suddenly drop before the pump kicks in.
To set the tank properly turn off the pump, drain all water pressure, then set the air pressure in the tank to the same as the water pressure was. Turn it back on and check again.

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If we go down the list of possible causes, it may help;
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  • holding tank has appropriate pre charge
  • bladder in holding tank not ruptured.

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The tree may have damaged a pipe,which is letting air into the system. I'm suprised you haven't mentioned a leak. It's possible for air to be pulled in thru the motor seal, if suction is high. High suction usually means trouble in the well, a clogged point or a malfunctioning check. Push on pipes and the pressure line to the switch, if they leak water out, air can be drawn in.

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