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Thread: Need timer advice

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    Need timer advice

    I was thinking of adding a timer to my pump and heater circuit and read that some of the Intermatic timers have a feature whereby the heater shuts off 20 minutes before the pump. "Eliminates the problem of pounding and knocking due to overheated water, reduces scale and lime deposits and extends the service life of the heater."

    How important is this? I have a Hayward H350 gas heater.
    Concrete (gunite) inground pool and spa (80,000 litres/21,000 gallons)
    Hayward H350 natural gas heater (electronic)
    Goldline Aquarite chlorine generator
    Hayward pumps, Hayward Pro Series sand filter, Goldline valve actuators

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD

    Re: Need timer advice

    Some heaters absolutely require a fireman switch, some really don't care. Nearly all heaters will last longer if they are they are turned off before the pump turns off, only a few will outright fail. If I remember correctly the H350 is a heater that does not require a fireman switch but will most likely last longer if you have one.
    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

  3. Back To Top    #3

    In the Industry
    budster's Avatar
    Join Date
    Dec 2008
    Savannah Historic District

    Re: Need timer advice

    The T101PR201 or T104PR201 will get you there.

    "Leave the gun...take the cannolis"

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