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Thread: Selecting the right size Intellichlor

  1. Back To Top    #1

    Join Date
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    Selecting the right size Intellichlor

    We are about to start construction of a pool about 27000 gallons near Houston. We really want to go with SWG but I am unsure about the size. I guess we would go either IC40 or IC60. If we select the bigger one, will it be too much if we run the pump many hours (low flow rates)?

    I generally prefer to get the right (large) equipment up front to minimize maintenance and problems down the road.

    Any insight is welcome.
    22000 gallon IGP, 820 sqft, SWG - IC60, infinity edge spa, Pentair Quad DE 100, 3 x Pentair Intelliflow 4x160 pumps (one for circulation + one for spa + one for sheer descents), spa with 8 jets + 4 leg jets, air blower, Pentair EasyTouch 8 remote, Pentair Intellibrites LED (white) - 2 in pool and 1 in spa, Pentair Master Temp 400,000 btu heater, 4 sheer descents (2x2', 2x6'), limestone coping and decking, Pebblesheen Prism Blue

    Useful links:
    Pool Chemistry
    Chlorine reactions

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    Re: Selecting the right size Intellichlor

    The IC40 would provide more than enough chlorine to sanitize your pool, provided you maintain the CYA level at the recommended level for pools using SWCG.

    pool-school/water_balance_saltwater_generator

    The IC40 will require a minimum flow rate of 25 gpm to operate.
    poolschoolgrad

    20x40 free-form IG vinyl, 1hp Hayward superpump, Hayward pro grid DE filter, Raypak heatpump, Goldline Aquarite SWCG, Polaris 280 with booster, and tested using a Taylor K2006.

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    susa's Avatar
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    Re: Selecting the right size Intellichlor

    I've tested successfully IC40 at 15 GPM (~ 1200-1250 RPM) on IntelliFlow VF and the Flow Switch activates chlorine generation.

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    Re: Selecting the right size Intellichlor

    Be careful with the lower flow rates. The safety of your family, including the cute little dog, are of primary importance.

    Pentair cautions against a flow rate less than 25.

    " WARNING - Never operate the IntelliChlor Electronic Chlorine Generator
    (IECG) without proper flow or water circulation. A build-up of
    flammable gases will result in hazardous conditions.
    Operate unit with minimum flow of 25 gpm"


    http://www.pentairpool.com/pdfs/IntelliChlorpcOM.pdf
    poolschoolgrad

    20x40 free-form IG vinyl, 1hp Hayward superpump, Hayward pro grid DE filter, Raypak heatpump, Goldline Aquarite SWCG, Polaris 280 with booster, and tested using a Taylor K2006.

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    JasonLion's Avatar
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    Re: Selecting the right size Intellichlor

    Most of the time it is more cost effective to get a cell larger than what you really need. Cell lifetime scales with the size given that both are used on the same sized pool. So the IC60 will last 50% longer than the IC40, and doesn't cost 50% more, so you save money in the long run. A larger cell can also be handy when you need to raise the FC level quickly.

    However, with the Pentair units in particular, when used without an automation system, there can be disadvantages to this. With an automation system the larger unit is well worth it. The issue without an automation system centers around how finely you can adjust the SWG percentage. An oversized unit needs to be run on a fairly low percentage to begin with, so you need fairly fine control to get the level you want. Without an automation system the Pentair SWG are set in steps of 20%, which can be too coarse for an oversized unit. The automation system lets you set it in steps of 1%, which works much more easily.
    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

  6. Back To Top    #6

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    Re: Selecting the right size Intellichlor

    Having the Pentair system myself, Jason is right on with his advice. If you are going to get the pentair automation, I'd do an IC-60. Without the automation, you will have difficulty fine tuning one that large. Get the IC-40 if you're not getting the automation. I have an IC-40 on a 14,000 gallon pool and w/o the automation i coudnt fine tune it very well.
    14,000 gallon IG, Vinyl. Hayward 3/4 hp superpump, Penatair IC40 SWCG, Pentair automation, Hayward sand filter, Aqua Comfort heat pump, Hayward 400k Lo-Nox LP heater.

  7. Back To Top    #7

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    Re: Selecting the right size Intellichlor

    We are getting the automation system (either EasyTouch or IntellyTouch) so I will follow the advice and go for the IC60 unless the PB REALLY recommends against it.

    Thanks.
    22000 gallon IGP, 820 sqft, SWG - IC60, infinity edge spa, Pentair Quad DE 100, 3 x Pentair Intelliflow 4x160 pumps (one for circulation + one for spa + one for sheer descents), spa with 8 jets + 4 leg jets, air blower, Pentair EasyTouch 8 remote, Pentair Intellibrites LED (white) - 2 in pool and 1 in spa, Pentair Master Temp 400,000 btu heater, 4 sheer descents (2x2', 2x6'), limestone coping and decking, Pebblesheen Prism Blue

    Useful links:
    Pool Chemistry
    Chlorine reactions

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    Re: Selecting the right size Intellichlor

    Glad I found this thread. Doing a 22K gallon pool with EasyTouch and ScreenLogic. Found this before PB ordered equipment. Asked them to upgrade from IC40 to IC60 for slight upgrade cost.
    17'x35' 22,500 gal. Gunite IGP 3.5-8.0 ft. IC60 SWG, 2 skimmers, 2 main drains, 4 returns. CCP520 cartridge filter, 3hp IntelliFlo 2 VST VSP, EasyTouch 4, ScreenLogic2, 2 IntelliBrite Color LEDs, Poolmiser autofill, UltraTemp 120R H/C 125K BTU heat pump, Diamond Brite Super Blue, No spa or water features.

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