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Thread: Heating IG spa

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    Heating IG spa

    Just bought a house with a pool and inground spa and can't get the spa to heat.

    The heating unit gets extrememly hot (too hot to touch), but the spa water does not heat. There are two valve controls, each is labeled pool at 9 o'clock and spa at 3 o'clock. I assumed having the intake and return both set to spa with the heater switched on would heat the spa.

    What am I missing (aside from common sense, apparently)? And is it normal for the heating unit to be so hot to the touch?
    IG pool approx 15k gallons, IG spa approx 500 gallons
    Gunite, Built in '92, Posi-flo cartridge filter,
    Polaris cleaner, gas heater

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    Mod Squad jblizzle's Avatar
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    Re: Heating IG spa

    Welcome to TFP!!!

    Please add your pool details and location as described HERE as it will help us help you.

    I would also assume you just have to turn 2 valves and flip on the heater ... heaters get hot, that is their job

    Post up a picture of your equipment pad.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
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    Re: Heating IG spa

    Thank you! Just added the info to my signature.
    IG pool approx 15k gallons, IG spa approx 500 gallons
    Gunite, Built in '92, Posi-flo cartridge filter,
    Polaris cleaner, gas heater

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    Re: Heating IG spa

    pool pad
    Attached Images Attached Images
    IG pool approx 15k gallons, IG spa approx 500 gallons
    Gunite, Built in '92, Posi-flo cartridge filter,
    Polaris cleaner, gas heater

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    Re: Heating IG spa

    intake
    Attached Images Attached Images
    IG pool approx 15k gallons, IG spa approx 500 gallons
    Gunite, Built in '92, Posi-flo cartridge filter,
    Polaris cleaner, gas heater

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    Re: Heating IG spa

    return
    Attached Images Attached Images
    IG pool approx 15k gallons, IG spa approx 500 gallons
    Gunite, Built in '92, Posi-flo cartridge filter,
    Polaris cleaner, gas heater

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    Mod Squad jblizzle's Avatar
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    Re: Heating IG spa

    So did you turn the two 3-way valves such that the handle was toward Spa and the "off" was toward Pool? The orientation you have them in the pictures has both the pool and spa open ... that is generally not a good idea on the suction side as you may end up draining the spa.

    What is that other pump back by the heater?
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
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    Re: Heating IG spa

    Quote Originally Posted by jblizzle
    So did you turn the two 3-way valves such that the handle was toward Spa and the "off" was toward Pool? The orientation you have them in the pictures has both the pool and spa open ... that is generally not a good idea on the suction side as you may end up draining the spa.

    What is that other pump back by the heater?
    I had both handles pointed to spa when I turned the heater on. I leave both handles in the middle for normal filtering. That's how the previous owner had them.

    The pump by the heater is for the spa jets.
    IG pool approx 15k gallons, IG spa approx 500 gallons
    Gunite, Built in '92, Posi-flo cartridge filter,
    Polaris cleaner, gas heater

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    Mod Squad jblizzle's Avatar
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    Re: Heating IG spa

    So where does the heater tie into the plumbing? No picture of that.

    If you leave both suction lines open ... make sure you are returning more water to the spa that you are sucking out ... there should always be some spillover back into the pool.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

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    Charlie_R's Avatar
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    Re: Heating IG spa

    Does the filter pump come on when you turn on the heater? Or is that a separate switch?
    15'x48" 4500 gallon Intex pool, buried 1.5 ft. Pac-Fab Dynamo 3/4 hp pump. Hayward S180T sand filter, bought used. Taylor K-2006 test kit. Rocket mass heater based wood fired pool heater.

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    Re: Heating IG spa

    Quote Originally Posted by Charlie_R
    Does the filter pump come on when you turn on the heater? Or is that a separate switch?
    No, I turn the pump on and then flick the switch to high or low on the heater. I'll try to get a couple of more pics.
    IG pool approx 15k gallons, IG spa approx 500 gallons
    Gunite, Built in '92, Posi-flo cartridge filter,
    Polaris cleaner, gas heater

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    Re: Heating IG spa

    Quote Originally Posted by jblizzle
    So where does the heater tie into the plumbing? No picture of that...
    I'll post pics in order going left to right.
    Attached Images Attached Images
    IG pool approx 15k gallons, IG spa approx 500 gallons
    Gunite, Built in '92, Posi-flo cartridge filter,
    Polaris cleaner, gas heater

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    Re: Heating IG spa

    next
    Attached Images Attached Images
    IG pool approx 15k gallons, IG spa approx 500 gallons
    Gunite, Built in '92, Posi-flo cartridge filter,
    Polaris cleaner, gas heater

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    Re: Heating IG spa

    next
    Attached Images Attached Images
    IG pool approx 15k gallons, IG spa approx 500 gallons
    Gunite, Built in '92, Posi-flo cartridge filter,
    Polaris cleaner, gas heater

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    Re: Heating IG spa

    last
    Attached Images Attached Images
    IG pool approx 15k gallons, IG spa approx 500 gallons
    Gunite, Built in '92, Posi-flo cartridge filter,
    Polaris cleaner, gas heater

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    Re: Heating IG spa

    bump
    IG pool approx 15k gallons, IG spa approx 500 gallons
    Gunite, Built in '92, Posi-flo cartridge filter,
    Polaris cleaner, gas heater

  17. Back To Top    #17
    Mod Squad jblizzle's Avatar
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    Re: Heating IG spa

    So it appears that the filtered water is always flowing through the heater (correct?)

    If you have the suction and return set to spa, do you feel water flow through the spa? (You must have separate drain and return for the filtered water if that other pump is for the spa jets) If you do have flow, then with the heater turned on, you would have to feel hotter water returning to the spa. I am not sure how it would be possible for the water to flow through the heater (which is hot to the touch) and not have the water heated before returning to the spa.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  18. Back To Top    #18

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    Re: Heating IG spa

    It's working now! As expected, something obvious missed on my part. The previous owner painted white lines on the handles as pointers, but apparently the valves are labeled backward. The way his "pointers", having both valves set to "pool" circulates water in the spa only. Also, it appears I need to have the blower on for the jets, as well, or perhaps that simply heats it more quickly.

    Thank you for your help!
    IG pool approx 15k gallons, IG spa approx 500 gallons
    Gunite, Built in '92, Posi-flo cartridge filter,
    Polaris cleaner, gas heater

  19. Back To Top    #19
    Mod Squad jblizzle's Avatar
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    Re: Heating IG spa

    Glad you got it figured out ... sounds like maybe the pipe are not labelled correctly?

    The blower has nothing to do with the filtration/heating loop of water so it should not affect the heating.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  20. Back To Top    #20

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    Re: Heating IG spa

    Quote Originally Posted by jblizzle
    Glad you got it figured out ... sounds like maybe the pipe are not labelled correctly?

    The blower has nothing to do with the filtration/heating loop of water so it should not affect the heating.
    The water didn't seem to be circulating without the blower, even though the pump was on. I'll turn the blower off in a few minutes to see if the temp is maintained/still heating. Already gained 10 degrees pretty quickly.
    IG pool approx 15k gallons, IG spa approx 500 gallons
    Gunite, Built in '92, Posi-flo cartridge filter,
    Polaris cleaner, gas heater

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