New Heat Pump - Blowing Cartridge Filter

highpress

New member
Aug 10, 2019
2
Anne Arundel County MD
Hi All,
First time poster, I found this forum last year when we got our new pool. We had a new 21' foot round installed last year and I've been following the methods here on water testing/balancing since we got the pool and to date have never had a problem with algea or any other issue. I closed the pool last summer and opened this summer to a nice clean pool and chemically so far have been smooth sailing. I've followed the advise, reading pool school and doing my own testing with K2006.

The issue i have is I installed a new heat pump earlier this year. It is a Raypak 5450 103BTU. I thought i had installed it correctly. It appears to function fine (heats the water as it should). The problem is i have "ruptured" 3 filters. Never had an issue last summer with the filter. The pump I have is rated at 60GPM. I believe the heat pump can handle up to 80GPM. Without the heat pump my normal operating pressure is 14PSI. When i divert flow to the heater (I have a 3way valve installed on the outlet side of filter) the PSI jumps to 16. To me that seams normal. I'm at a loss on how/why these filters keep rupturing. I have tried diverting less water to the heat pump by not opening the valve all the way (the PSI remained at 14 no increase in pressure). I ran it through the heat pump 24hrs, shut it down and check the filter. The filter was fine i thought the problem was solved. 2 weeks later i have another ruptured filter. I have never noticed any high pressure, but it seams like continued flow through the heat pumps will rupture the filter. My pump runs about 6 hours a day. Currently i have bypassed the heater totally until i can get this figured out. Not super happy about replacing filters every few weeks.

I would appreciate any thoughts. I am attaching some pics of the install. Really don't know what to do from here. If i can't figure it out i will have to call in the big guns. (pool company that does service calls?).

Thanks,
James
 

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JamesW

TFP Expert
Mar 2, 2011
16,082
It has nothing to do with the heat pump.

The filter is plumbed backwards. The Inlet and outlet are reversed.

Water should go from the outside of the cartridge to the inside. It's going from the inside to the outside.
 
Last edited:

highpress

New member
Aug 10, 2019
2
Anne Arundel County MD
It has nothing to do with the heat pump.

The filter is plumbed backwards. The Inlet and outlet are reversed.

Water should go from the outside of the cartridge to the inside. It's going from the inside to the outside.
OMG!!! I think you may be right. When i installed the heat pump earlier this year i didn't like the way the drain outlet was not close to the house. It's hard to explain but I disconnected the filter pump and outlet side, and rotated the filter housing 180* so the drain outlet was near the house and not "sticking out". I never thought about the fact that i was altering the flow of water through the cartridge. Wow i am sure you are correct! Thanks so much I can't tell you how much frustrated i was. Thanks again!!!! So excited i can't wait to get it fixed!!!!
 
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