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Thread: Pump Timer with Heater

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    Pump Timer with Heater

    I am thinking of installing a Pump Timer on my pool system, and was wondering if it's important to have my gas heater shut off prior to my pump motor. The heater does have a pressure switch which shuts down the heater if the pump is not running. Someone mentioned to me that the pump should run for about 10 minutes after the heater is shut down, to not leave hot water in the heater pipes.

    Thanks in advance for the advice - Irving

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    Mod Squad Bama Rambler's Avatar
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    Re: Pump Timer with Heater

    Imagine if it was firing hard and all of a sudden the pump shut down. How hot would the water get and all the components get with no water flow through it? Yes, it needs to have a firemans switch.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
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    Re: Pump Timer with Heater

    Thanks

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    mickey4paws's Avatar
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    Re: Pump Timer with Heater

    Hi Irving, welcome to TFP

    We just turn off the heater about 20 minutes or so before the pump shuts down for the night, or if we're done swimming, we'll turn off the heater then.

    Dave, what is a fireman's switch and are they easy to install? I would ask my pool builder to install it but just want to know if it's something simple or more complicated.
    IG 12' x 39' - 20k Gallons - Vinyl Lined - StaRite Cristal-Flo II 26" Sand Filter - Hayward SuperPump 1 hp - Dolphin Dynamic autocleaner - Lochinvar Energyrite gas heater - Aqua Rite SWCG T-15 - TF100 Test Kit - Skimlite Duallly 9016 pole (great pole)

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    Mod Squad Bama Rambler's Avatar
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    Re: Pump Timer with Heater

    It's a switch on the timer that shuts the heater down. Some timers can be retrofitted with one if it doesn't already have one.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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    Re: Pump Timer with Heater

    How often do you feel that the heater is running when the timer might shut off? Granted it is wise to put a firemans switch in if you can. Also consider that once a heater gets the water to temp and it's not firing, shutting the heater off and letting the pump run really isn't cooling it down much if at all. I see thousands of systems a year that have no firemans switch in place and they have been ok. Many of these are new pool installs and the builder never integrated it into their plans. Heck they probably have no idea what a firemans switch is. Plus if it's not code, they don't do it.
    Paul
    http://www.gastekservices.com A word of caution: When working with gas and electrical you might want to consider a licensed contractor. Consider the value of your life and others around you. If you would like to provide a review of the help I provided, please use the following link to leave a review. gastek - Google Search,

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