Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 6 of 6

Thread: compupool CPSC48 Need help with the math.

  1. Back To Top    #1

    Join Date
    May 2012
    Location
    Allentown, PA
    Posts
    219

    compupool CPSC48 Need help with the math.

    FC 10
    cc.5
    ph 7.7
    CYA 65 (I added to go to 75 a week ago and not seeing a change)
    Hello,
    When I bought my CPSC48 about 4 years ago it was rated at about 2.3 Lbs/hr. at a 24 hour run time. Now looking at discount salt pools website the output for my unit has been changed years later. Full Market Comparison of Salt Water Chlorine Generators for Swimming Pools According to discountSP it produces 1.28 lbs. per day. My cell is having trouble holding up this summer with all the hot weather and people swimming daily. I passed the OCLT and my chlorine dropped from 7ppm in the morning to 5ppm at the evening. I usually have the pool covered with the solar cover and that really helps the swg produce, but with the really hot stretch of weather it has been uncovered. My question is how much chlorine should this thing produce on a 12Hr. run time, and how much FC will a full sun 22K pool burn through? I can see the unit is producing chlorine.
    21,500 Gallon Vinyl liner pool Eastern Pennsylvania
    Hayward 2 HP pump 2" Pvc pipes Full Sun Pool
    Hayward sand filter, Compupool CPSC 48 SWG
    12mil solar cover and reel

  2. Back To Top    #2
    Mod Squad YippeeSkippy's Avatar
    Join Date
    Jan 2012
    Location
    'burbs of Augusta, Georgia
    Posts
    6,481

    Re: compupool CPSC48 Need help with the math.

    I think you should first turn the SWG off tonight and perform an Overnight Chlorine Loss Test to determine if there is something in your water chewing up that chlorine. Directions --> Overnight Chlorine Loss Test

    Make sure you test again tomorrow morning before the sun rises on to the pool (which would skew the test).

    You may very well have a low level algae bloom being kept at bay by the chlorine....
    My Amazon Smile for November12K Fiberglass IG, Infinity 4000 automatic cover, SWCG, Hayward Sand Filter, Hayward 1.5 Pump, Doheny Discovery Robot, Savi Melody LED pool lights, outdoor speakers and other assorted doo-dads. Sundance Altamar Hot Tub.
    Our pool build--> Our Pool Solved Our Sloping Yard Skippy's Cheap Pool Cooler -->Skippy's New Fountain

  3. Back To Top    #3

    Join Date
    May 2012
    Location
    Allentown, PA
    Posts
    219

    Re: compupool CPSC48 Need help with the math.

    Great minds think alike, I was planning on doing the OCLt tonight as well. Anyone else out there have some information on how fast 1.28 Lbs per day of chlorine is consumed in a day? Thanks
    21,500 Gallon Vinyl liner pool Eastern Pennsylvania
    Hayward 2 HP pump 2" Pvc pipes Full Sun Pool
    Hayward sand filter, Compupool CPSC 48 SWG
    12mil solar cover and reel

  4. Back To Top    #4
    mas985's Avatar
    Join Date
    May 2007
    Location
    Pleasanton, CA
    Posts
    11,486

    Re: compupool CPSC48 Need help with the math.

    At a CYA of 65 ppm, you should lose less than about 50% per day. If the unit runs 12 hours at 100%, it should add about 3.6 ppm. So if your normal FC is 10 ppm, that means you would lose about 35% per day which is reasonable. BTW, you really don't need 10 ppm with a SWG. At 65 ppm CYA, you really don't need more than about 4 ppm.
    Mark
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, MaxFlo SP2303VSP, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

  5. Back To Top    #5

    Join Date
    May 2012
    Location
    Allentown, PA
    Posts
    219

    Re: compupool CPSC48 Need help with the math.

    Thanks Mas985. I'm running my swg at 70% for 12hrs. I have been trying to keep my FC at about 10 at the end of the day because I had an algae outbreak in the beginning of July. I try not to run the swg at 100% due to overheating (I have read on here about compupool units melting), so I should be producing about 2.5 FC per day if I'm running my swg at 70% (12hrs). I'm thinking I'm going to try and target between 6-8.5 FC, and see if it holds. Also, how do you convert lbs. of chlorine gas into FC? Thanks
    21,500 Gallon Vinyl liner pool Eastern Pennsylvania
    Hayward 2 HP pump 2" Pvc pipes Full Sun Pool
    Hayward sand filter, Compupool CPSC 48 SWG
    12mil solar cover and reel

  6. Back To Top    #6
    mas985's Avatar
    Join Date
    May 2007
    Location
    Pleasanton, CA
    Posts
    11,486

    Re: compupool CPSC48 Need help with the math.

    To get ppm of FC, take the lbs of chlorine gas added during the runtime and % and divide it by the lbs of water = 21500*8.34

    or

    ppm = 1.28/24 * hrs runtime * pct / (21500*8.34)
    Mark
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, MaxFlo SP2303VSP, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •