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Thread: Run Time

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    Run Time

    What is better: Running the generator at 100% chlorine output for 6-7 hours or running the generator at 40% chlorine output for 9-10 hours.
    24,500 gallon plaster i/g
    sand filter (Hayward S-200)

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    Re: Run Time

    Define "better"

    What are you trying to accomplish? What are your current chemistry results?
    17k in-ground, Pebble Sheen finish (Blue Granite), Solar, two skimmers, split drain.
    IntelliPro VS-3050, IntelliChlor IC40, EasyTouch 4 control system, Easy Touch wired indoor panel.
    300 CuFt cartridge filter. Polaris 380 with booster pump. Two IntelliBrite 5G lights.
    TF100 test kit.

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    Re: Run Time

    100% for 6.5 hours is x% more chlorine production than 40% for 9.5 hours.

    (1.00 x 6.5) / (.40 x 9.5) = 1.71

    You produce about 70% more chlorine at 100% for 6.5 hours. You also use 70% more power and useful life of the cell. (all approximations).
    17k in-ground, Pebble Sheen finish (Blue Granite), Solar, two skimmers, split drain.
    IntelliPro VS-3050, IntelliChlor IC40, EasyTouch 4 control system, Easy Touch wired indoor panel.
    300 CuFt cartridge filter. Polaris 380 with booster pump. Two IntelliBrite 5G lights.
    TF100 test kit.

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    Butterfly's Avatar
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    May 2007
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    Re: Run Time

    Running your SWG at 100% will shorten the life of the cell, so that is not recommended.

    Here's a min 8 hour run-time recommendation from Pool School:
    pool-school/water_balance_saltwater_generator

    Posting a full set of water test #'s will help. One of the most common probs w/a SWG is having a too low CYA level.
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    Re: Run Time

    Thank You will follow pool school recommendations
    24,500 gallon plaster i/g
    sand filter (Hayward S-200)

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    Join Date
    Jun 2009
    Location
    Vero Beach, FL
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    462

    Re: Run Time

    Quote Originally Posted by Butterfly
    Running your SWG at 100% will shorten the life of the cell, so that is not recommended.
    Are you saying running 2 hrs at 50% is better than 1 hr at 100%? Does it matter how your SWG accomplishes the % output? Some just turn on and off to get the desired %. But I think my CompuPool actually adjusts the voltage to the plates.
    25' x 13' Roman, 12000 gal IGP, Plaster, with 500 gal Spa
    SWG, 1 HP Max Flo Pump, C-900 cartridge filter
    Solar heat

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    New2Me's Avatar
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    Jun 2008
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    SW Indiana
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    Re: Run Time

    Cell life is usually measured in Amp/hours, so 2 hours at 50% is EXACTLY the same as 1 hour at 100%. To get 50 % power, the controls shut off power to the cell, either abruptly (relay) or tapering (solid state relay.) That opens the great debate about what is more damaging to the cell, steady-state operation, or cycling. Cycling the polarity reversal (cleaning) is known to shorten cell life, so you definitely want that to occur as little as needed to keep it clean, so why power cycle it at more?
    The pump is using much more power then the ECG. I would determine what pump run time is required to filter the pool, and adjust the % to fit that time period. If you get too little FC at 100% in that time, then you will need to increase the pump time. Too much, then decrease the %.
    The things really don't make that much chlorine at full power, so if you want to maximize cell life, why not run it there when you run it? Put it on its own timer and set it at 100% power so that it is not cycling power, and possibly reducing cell life.
    22 x 40 IG vinyl lined, 23,570 gal.
    1 hp. Pac-Fab Challenger pump 300# sand filter
    Intex 8110 SWG, Hayward CL220 offline feeder
    Hayward 250K Btu gas heater
    Aquabots

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    Join Date
    Jun 2008
    Location
    Texas
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    132

    Re: Run Time

    The general advice is to run your filter pump sufficient number of hours to filter the pool and mix your pool chemicals. For most people this is 8 hours or more. Set the SWG per cent to maintain a least a 4 ppm FC. The filter pump requires substantial amount of electricity; the SWG requires very little electricity to operate. You will minimize your use of energy by running your filter pump the minimum number of hours required to filter your water and adjusting your SWG accordingly.
    30,000 gallon gunite in-ground with a spillover spa, Diving board and water slide
    Hayward 1 HP Super II filter pump, Hayward 24 " Sand Filter Pro Series using zeolite media
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