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Thread: SWG %age level - what does it REALLY mean ?

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    SWG %age level - what does it REALLY mean ?

    If I set my SWG generator %age to (say) 25% - Does that mean that :

    a) It generates chlorine at 25% of its capacity for 100% of the time the pump is running -or-
    b) It generates chlorine at 100% of its capacity for 25% of the time the pump is running
    c) Some other combination ?

    If (b) how is the pump run time determined ?

    Confused of Texas.

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    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD

    Re: SWG %age level - what does it REALLY mean ?

    Most SWGs work using method B above, run at 100% power for <configured>% of the time the pump is running, though a few of them work some other way.

    The SWG normally has two or more ways of knowing when the pump is on. Typically it is wired so the SWG is only powered up when the pump is running and it also has a flow sensor so it can make sure that water is actually flowing.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    elwood58's Avatar
    Join Date
    May 2012
    Sun City West Arizona (2nd Home)

    Re: SWG %age level - what does it REALLY mean ?

    Most units use the method B that you describe. The SWCG will not run unless the pump is running. Your pump run time and SWCG % can both be udjusted to give you the circulation you need, along with meeting your chlorine demand. It will take some trial and error.
    14100 Gal IG MiniPebble, Pentair Intellichlor IC-40 SWG, Sand Filter, Pop Up Cleaning, Intelliflo VS Pump, Aquacal Heatpump/Chiller, 1/4 Acre Desert Landscaped, Lots of Deck. Built in 1984, updated in 2012 and 2014
    "If you don't measure it, you can't manage it!"

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    Re: SWG %age level - what does it REALLY mean ?

    Can't speak as to what "most" of them do, but my Compupool operates according to your description "a" above. If I set the % at 50, that means that the controller will send 50% of max current to the cell during the time it is on, thus, 50% of it's generating capacity.

    It is generating chlorine 100% of the time my pump is running since it is hardwired from the external timer.
    23,000 IG Plaster pool w/ spa, Pentair FNS Plus 48 DE Filter, Hayward RS1000 Main pump, Polaris booster pump, CPSC48 SWG, Legend pool sweep. Dallas, Texas, Full sun, Taylor K-2006

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