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Thread: Pentair UltraTemp Heat pump - Suction temp?

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    Pentair UltraTemp Heat pump - Suction temp?

    I have a new Pentair UltraTemp Heat pump, and I am having trouble understanding the menu screens. In general the heater seems to be working fine, but the temperature readings seem inconsistent. On the running unit, the Pool Run Screen shows the following:

    POOL HEATING F
    SET=85 ACT=84

    However, when I press the MENU button to cycle through the display, I come across a screen that displays:

    SUCTION TEMP
    ACTUAL = 62

    The pool certainly does not feel like 62, but it's not 84 either. I don't have a regular pool thermometer to compare it to. My question is, why is there such a radical difference between the 'actual' temperatures?

    Thanks in adavance...

    ~Paul Mc
    40 x 16 IG Fiberglass pool | Triton II residential Sand Filter | SWG | Pentair UltraTemp 125,000 BTU HeatPump | Pentair IntelliPro VS+ SVRS Variable Speed pump

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    Lershac's Avatar
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    Re: Pentair UltraTemp Heat pump - Suction temp?

    The 62 reading is the inlet suction temp, the 84 is the outlet temperature (after heating).

    The difference is because the heater is working!
    (DIY):16K Gal 20X30 rectangular IG Gunite, w/spa, CCP 520 filter,2 Pentair VS pumps, 400KBTU Pentair gas heater, Heat Pump for cooling, **update5.25.2013** added an intellichem with acid pump that will control existing SWG. My Build Thread Here

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    Re: Pentair UltraTemp Heat pump - Suction temp?

    So that means that the coldest part of the pool (meaning the deep drains) is at 62, right? am I correct that the heater will only shut down when that reaches the set temp?
    40 x 16 IG Fiberglass pool | Triton II residential Sand Filter | SWG | Pentair UltraTemp 125,000 BTU HeatPump | Pentair IntelliPro VS+ SVRS Variable Speed pump

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    Re: Pentair UltraTemp Heat pump - Suction temp?

    I think that the suction temperature refers to refrigerant temperature, not water temperature. The actual temperature should be the pool water temperature.

    You need to get a thermometer to check the actual temperature of the pool water for comparison. Is the pump and heater on? Is the heat pump getting sufficient water flow?

    As long as the water is being circulated enough, there will not be more than one or two degrees difference between the top and bottom water temperature. The top 12 inches can be somewhat warmer than below, but it should not be much.

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    Lershac's Avatar
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    Re: Pentair UltraTemp Heat pump - Suction temp?

    Quote Originally Posted by JamesW
    I think that the suction temperature refers to refrigerant temperature, not water temperature. The actual temperature should be the pool water temperature.

    You need to get a thermometer to check the actual temperature of the pool water for comparison. Is the pump and heater on? Is the heat pump getting sufficient water flow?

    As long as the water is being circulated enough, there will not be more than one or two degrees difference between the top and bottom water temperature. The top 12 inches can be somewhat warmer than below, but it should not be much.

    Hmm you may be right but I would think the refrigerant on the cold side would be in the 40s. I will have to check my manual when mine comes in.
    (DIY):16K Gal 20X30 rectangular IG Gunite, w/spa, CCP 520 filter,2 Pentair VS pumps, 400KBTU Pentair gas heater, Heat Pump for cooling, **update5.25.2013** added an intellichem with acid pump that will control existing SWG. My Build Thread Here

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    Lershac's Avatar
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    Re: Pentair UltraTemp Heat pump - Suction temp?

    That is the refrigerant suction temp. So says pentair guy on the phone.
    (DIY):16K Gal 20X30 rectangular IG Gunite, w/spa, CCP 520 filter,2 Pentair VS pumps, 400KBTU Pentair gas heater, Heat Pump for cooling, **update5.25.2013** added an intellichem with acid pump that will control existing SWG. My Build Thread Here

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