Looking to switch to SWG

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beatle

Well-known member
Dec 22, 2021
54
tucson
Pool Size
25000
Surface
Plaster
Chlorine
Liquid Chlorine
Current: 25K gallon plaster pool with DE filter and pentair variable speed pump. Bought this house/pool 3 years ago. It was fed by hard water previously and now the house has a water softner that can be bypassed. The water tests at 800ppm for hardness. I switched to liquid chlorine a few months ago. I was thinking that I should do a water replacement before I switch to the SWG. I was planning to get rid of approx 1/2 of the water and replace with water run through the softner. I have a taylor water tester if need be.

I looking to go to SWG this winter after I do the water change. I am decently handy and plan to install myself. I am looking for recommendations on which brand/size and if I should get an install kit as well. I was thinking I need to spend $2k or so.

This is in S AZ so we have a lot of evaporation in the summer.
 
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You need a means to remove the power to the SWCG when the pump is off.
Either a timer for the SWCG or a current sensing device.
 
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I run my pump24/7 at 1200 rpm. Then higher at times for skimming. Does that matter? I was planning on hard wiring it to the same timer unit that the pump gets power from.
 
You show a VS pump. So it should not be wired to a timer.
If you always plan to run the pump 24/7, technically you do not need a means to remove the power from the SWCG. Except for the CBreaker.

Though if you have a timer, you could use that for the SWCG as the pump should not be using it.
 
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mknauss said:
You show a VS pump. So it should not be wired to a timer.
Click to expand...
I reused the wiring that ran to the original one speed pump to now power the multispeed. The timer is just set to always be on now. So I think this is acceptable to what you guys are stating, yes?

Thank you all for the help.
 

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Your VSP should be wired wired directly to power. In addition to a GFCI Breaker for the pump (required by code), I use a 240v service disconnect at the pump as additional protection.

I personally don't like the SWG on a timer solution with the VSP. If the pump fails while on the timer, the SWCG can still run. If you lose power for a period of time the timer and the pool pump schedule can get mismatched (not an issue in your case).

I used a Current Sensing Relay (CSR) on the pump power that stops the SWG if the current drops to the pump. (CSR solution in the link below). I like that the cell can NEVER produce hydrogen gas in any failure mode with the CSR. Protect home and hearth...you know?

I would read this section in the WIKI on cell power when pump is off.

SWG How It Works - Further Reading

www.troublefreepool.com www.troublefreepool.com
 
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beatle said:
Thanks a bunch. The circuit is on a gfci and I will look into the CSR.
Click to expand...
I think you’ll find that being able to turn off the SWCG with the timer will be helpful. It helps limit the chlorine production if needed rather than turning down the %.
 
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