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Thread: Intelliflo Watts per RPM

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    Intelliflo Watts per RPM

    I found this post from 2009. Are these Watt numbers a good estimate for a VS3500? Will the Watts be constant for RPM or do they also depend on the GPM (that is do they vary depending on back pressure). I am trying to work out the best settings for a new VS3500 install. Also is there a minimum flow rate/PSI for a DE filter?

    Thanks

    Quote Originally Posted by chem geek
    At some point, you'll run into the "fixed" energy used by the pump regardless of speed. I have an IntelliFlo VF pump, but I've tried different manual speeds and found the following where you can see that the lowest speed isn't necessarily that much more efficient when accounting for the time of one turnover. There is a flat spot near the slower speeds and the ideal may be anywhere in the 15-26 GPM range, though obviously this depends a lot on the specific plumbing. The runtime for one turnover is for my 16,000 gallon pool.

    15 GPM (17.78 hours), 1185 RPM, 155 Watts ---> 2.76 KWh
    18 GPM (14.81 hours), 1325 RPM, 195 Watts ---> 2.89 KWh
    24 GPM (11.11 hours), 1460 RPM, 255 Watts ---> 2.83 KWh
    26 GPM (10.26 hours), 1495 RPM, 275 Watts ---> 2.82 KWh (measured at different time so might be a little higher in reality)
    30 GPM (8.89 hours), 1805 RPM, 420 Watts ---> 3.73 KWh
    36 GPM (7.41 hours), 1975 RPM, 535 Watts ---> 3.96 KWh
    40 GPM (6.67 hours), 2075 RPM, 615 Watts ---> 4.10 KWh
    42 GPM (6.35 hours), 2160 RPM, 685 Watts ---> 4.35 KWh
    48 GPM (5.56 hours), 2310 RPM, 835 Watts ---> 4.64 KWh
    54 GPM (4.94 hours), 2490 RPM, 1030 W ---> 5.09 KWh
    60 GPM (4.44 hours), 2710 RPM, 1305 W ---> 5.79 KWh
    66 GPM (4.04 hours), 2900 RPM, 1590 W ---> 6.42 KWh
    72 GPM (3.70 hours), 3080 RPM, 1895 W ---> 7.01 KWh
    78 GPM (3.42 hours), 3360 RPM, 2495 W ---> 8.53 KWh

    I do notice that surface circulation and skimmer vortex suction isn't as efficient at lower speeds, so Jason has a good suggestion of doing a mix so that you can still get decent cleaning. Since I have a pool cover that tends to inhibit surface circulation anyway, I just have my non-solar flow set at 26 GPM. Usually, the solar is on 4-6 hours a day with its 48 GPM and the total cycle is 8 hours. The solar energy cost is far higher than shown above since the 48 GPM requires 2980 RPM and 1500 Watts.

    Richard

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    JasonLion's Avatar
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    Re: Intelliflo Watts per RPM

    The relationship between watts and flow rate depends on the total dynamic head of your specific plumbing setup. That chart is as good a starting place as any, but it isn't going to match your pool (unless you happen to be very lucky).

    DE filters require a fairly high speed to coat the grids initially and after that they can run at very low speeds. The IntelliFlo always starts up fairly fast, so that shouldn't be a problem.

    The IntelliFlo Variable Speed Pump isn't shipping yet, so we don't know for sure, but so far everyone is assuming it has the same motor as the other models. There are some hints in the marketing materials about improvements, but I'm assuming that if they really improved the efficiency they would be boasting about it more already.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    Re: Intelliflo Watts per RPM

    See the Hydraulics 101 - Pumps, Pipes and Head post that contains a spreadsheet for modeling. As Jason noted, the actual energy consumption will depend on the specifics of your system -- pipe sizes and lengths, fixtures, bends, equipment, etc.
    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
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    Re: Intelliflo Watts per RPM

    Not sure which Intelliflo I have (have had it for a few years now) but there is a display on it which tells me exactly how much power it is drawing at any given time. Thus, all I have to do is set the flow rate and then I can read the energy usage in watts.
    20x40 IG vinyl, heatpump and solar and 3 siberian huskies, 10kw PV solar electric system. Nikon Photographer D800e dSLR.

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    Re: Intelliflo Watts per RPM

    Quote Originally Posted by JasonLion

    The IntelliFlo Variable Speed Pump isn't shipping yet, so we don't know for sure, but so far everyone is assuming it has the same motor as the other models. There are some hints in the marketing materials about improvements, but I'm assuming that if they really improved the efficiency they would be boasting about it more already.
    Are you talking about the Intelliflo XF variable speed? The VS 3050 has been on the market for over 4 years now. There is a new drive coming out the for the VS pump which doubtfully will give you any increase in efficiency. It will give you a built in timer and more speed controls.

    The XF variable speed should be a about 15-20% more efficient.

    There also is a company called performance pro pumps that makes a low head VS pump that is really efficient.
    20X40 30,000 gallon gunite pool

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    Re: Intelliflo Watts per RPM

    I think mine is a VF or something like that. It is continously variable. You can choose the GPM you want and it will run at whatever RPM is needed to deliver that flow rate. As the filter gets dirty it will up the RPM to maintain flow rate. You can also set it at a specific RPM of your choosing, there is not specific set points you just pick any RPM level you want.
    20x40 IG vinyl, heatpump and solar and 3 siberian huskies, 10kw PV solar electric system. Nikon Photographer D800e dSLR.

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    JasonLion's Avatar
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    Re: Intelliflo Watts per RPM

    I don't think we are talking about the XF. We are talking about the already announced Pentair IntelliFlo Variable Speed, also called the IntelliFlo VS-AU. My understanding is that the XF is still a rumor and the just shipping in the last few days VS-AU is essentially an VS+SRVS but without the SRVS, or alternatively a VS-3050 with a timer and 4 additional speed memories added, depending on how you think about it.
    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

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    Re: Intelliflo Watts per RPM

    It turns out you can see the RPM and Watts with the VS3500 - if you have a Suntouch Controller. In the Suntouch menu go to Pumps and check status. It reads current RPM and Watts.

    A

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