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Author Topic: Manifold Ciculation Pump Stopped Working  (Read 363 times)

DBeleskey

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Manifold Ciculation Pump Stopped Working
« on: April 14, 2020, 01:13:47 PM »

Hi
I posted a similar question in the Polar forum then realized it should have been here...

I have a Grundfos UPS15-58FC on my Polar G2 furnace on the manifold. It came on the furnace from new. Last night we had a wind storm and the power flickered badly a few times before my backup generator came on. This morning I notice no heat coming from the furnace. When I went out the circulator from the furnace to the house was running but it appears the one on the manifold to circulate the water in the furnace tank was not.
This pump is only a few months old, could it be on the fritz ?
I thought maybe the capacitor on the pump but I check it and get a reading of 11.45, the capacitor is 10 uF +/-10%
Don't know what else to try, or should I just try to find another pump ?
Dave
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RSI

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Re: Manifold Ciculation Pump Stopped Working
« Reply #1 on: April 14, 2020, 10:21:42 PM »

You could open up the pump and see if the impeller turns. If you remove the Allen head screws to motor should come off the head.

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E Yoder

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Re: Manifold Ciculation Pump Stopped Working
« Reply #2 on: April 15, 2020, 06:36:08 AM »

Make sure there's 120 v. at the pump. Otherwise remove and check for rotation, you might be able to see the impeller looking in the outlet side. If it's bad get a new one and see if you can get warranty.
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DBeleskey

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Re: Manifold Ciculation Pump Stopped Working
« Reply #3 on: April 16, 2020, 06:31:24 AM »

Well...Took the pump out so I could have a better look at it. It was kind of up in the left corner and hard to work on in place. It was simple removal and had spare gaskets so I decided to remove it if it might need replaced anyway. Once out I decided to remove the head as RSI suggested. The impeller was stuck for some reason. I freed  it up and all seems good now. In hindsight I should have just removed the pump head while still installed like RSI said but, live and learn...
Thanks for all your help. :)
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E Yoder

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Re: Manifold Ciculation Pump Stopped Working
« Reply #4 on: April 17, 2020, 03:17:11 AM »

Glad you got it running!
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mlappin

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Re: Manifold Ciculation Pump Stopped Working
« Reply #5 on: April 17, 2020, 08:17:15 AM »

Strange, Iíve literally never had a grundfos stick. Iíve seen a few B&Gís that i took a small screwdriver and reached in thru the fins and gave the fan a flick to get em running.
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DBeleskey

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Re: Manifold Ciculation Pump Stopped Working
« Reply #6 on: May 04, 2020, 06:53:06 AM »

Ya, it looked good and clean with no buildup inside, had a slight pink color from the water treatment but that's it. Don't know why it would do that, I guess when the power went out and then back on it wouldn't  wind up. They are off now,  and I will go out once a month and turn them on for a few minutes with Hope's that won't happen again. Time will tell I guess..
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