Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 13 of 13

Thread: Questions on variable speed pump program

  1. Back To Top    #1

    Join Date
    Jun 2012
    Location
    Smithtown, NY (Long Island)
    Posts
    65

    Questions on variable speed pump program

    I recently got all new equipment installed for my pool, including a Hayward MaxFlo 1.65 hp VS pump. The company that did all the installation set up the pump programs and told me there should be no need to tinker with it. Reading the TFP forums has taught me a lot, including to be skeptical of pool companies so I wanted some reassurances from here. The current program is:

    12AM-8M: 1800 RPM (at this level there is no filter pressure and the heater won't operate due to no flow)
    8AM-10AM: 2300RPM, (at this level there is 5psi on the filter and the heater won't operate due to no flow)
    10AM-11:45PM 3000 RPM (at this level there is 12psi and enough flow for the heater to work)

    So my main questions are:
    1) Is it normal for there to be no filter pressure and no flow to the heater at the two lower speeds.
    2) If it is normal, is there really any benefit to running the pump for 10 hours with little to no pressure other than to keep the water moving.
    3) It seems to me that running the pump from 10AM-11:45PM at 3000RPM seems like overkill. If I want to run the heater all day then I obviously need to, but I used to run it for four hours in the morning and four hours in the afternoon (after consulting the pool school) with my old one speed pump and never had a water quality problem.

    Thanks for any help
    ~30,000 Gallon Free Form Pool; IG; Vinyl; DE Filter; Installed 2005

  2. Back To Top    #2
    Mod Squad pooldv's Avatar
    Join Date
    Aug 2012
    Location
    DFW, TX
    Posts
    23,999

    Re: Questions on variable speed pump program

    1. Yes for filter pressure, depends on plumbing head pressure for the heater, but it seems like it should work above 2000 rpm
    2. Yes, filters work much more efficiently with low pressure
    3. Agree, a couple hours in the AM and PM should be fine

    I run my pump at 1100 rpm for skimming, making chlorine with the SWG and filtering. 0 pressure on filter gauge.
    TFP Moderator
    If TFP helped you or saved you money - Become a TFP Supporter! <--Click here
    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

  3. Back To Top    #3
    mas985's Avatar
    Join Date
    May 2007
    Location
    Pleasanton, CA
    Posts
    11,490

    Re: Questions on variable speed pump program

    2) Only if you are removing debris. Otherwise it is a waste of energy.
    Mark
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, MaxFlo SP2303VSP, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

  4. Back To Top    #4

    Re: Questions on variable speed pump program

    How do you determine what is the lowest speed at which the skimmer functions?

    Here is the method that works for me,

    While looking down into the skimmer basket I run the pump up at 50 RPM increments until I see 2 water ridge lines - I loosely refer to these as "harmonics" then tune from there in small rpm increments.

    This indicates to me Ive got enough skimming function for the pool to actually clean itself effectively- with a chlorinator I bump up till it activates then stop, Im back to bleach to I stop here.

    When the filter starts to plug up a quick glance in the basket will show a reduction to one harmonic, then on to nothing until you clean your filter or bump up the RPM to get everything flowing again (which defeats the purpose of all the nice gear to begin with)

    Happy tuning your pool for what works best for you.

    Dave
    Attached Images Attached Images
    20K Gallon Gunnite pool/900 Gallon in ground Spa/2HP WhisperflowSpa
    Pentair Master temp 400/Hayward Sand WZeobrite/Jandy RS-8 Aqualink/Jandy 2HP Epump
    12 - 4x10 Panels/Zodiac G3-T5 / BBB

  5. Back To Top    #5
    mas985's Avatar
    Join Date
    May 2007
    Location
    Pleasanton, CA
    Posts
    11,490

    Re: Questions on variable speed pump program

    The other thing you can do is look at the weir. Water should flow over the weir and pull the weir down. When the flow rate is too low, the weir will stand up straight and water will flow around the sides.
    Mark
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, MaxFlo SP2303VSP, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

  6. Back To Top    #6
    Mod Squad pooldv's Avatar
    Join Date
    Aug 2012
    Location
    DFW, TX
    Posts
    23,999

    Re: Questions on variable speed pump program

    Hey that is a handy tip!
    TFP Moderator
    If TFP helped you or saved you money - Become a TFP Supporter! <--Click here
    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

  7. Back To Top    #7

    Join Date
    Jun 2012
    Location
    Smithtown, NY (Long Island)
    Posts
    65

    Re: Questions on variable speed pump program

    thanks everyone, i will keep an eye on the skimmer in the morning at the lower speed. I'm leaning towards running it 12 hours, 4 each in the morning and afternoon at a high enough RPM to allow the heater to work and a 4 hours overnight at a lower speed.
    ~30,000 Gallon Free Form Pool; IG; Vinyl; DE Filter; Installed 2005

  8. Back To Top    #8
    mas985's Avatar
    Join Date
    May 2007
    Location
    Pleasanton, CA
    Posts
    11,490

    Re: Questions on variable speed pump program

    With the two 4 hour periods, you really shouldn't need the third. In fact, you should only need 2 2-3 hour run periods at most.
    Mark
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, MaxFlo SP2303VSP, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

  9. Back To Top    #9

    Join Date
    Jun 2012
    Location
    Smithtown, NY (Long Island)
    Posts
    65

    Re: Questions on variable speed pump program

    I'd like to have the heater on for more, especially early in the season. Doesn't ever really get too hot here in NY until July.
    ~30,000 Gallon Free Form Pool; IG; Vinyl; DE Filter; Installed 2005

  10. Back To Top    #10
    mas985's Avatar
    Join Date
    May 2007
    Location
    Pleasanton, CA
    Posts
    11,490

    Re: Questions on variable speed pump program

    Ok, that makes sense. Are you using a solar cover?
    Mark
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, MaxFlo SP2303VSP, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

  11. Back To Top    #11

    Join Date
    Jun 2012
    Location
    Smithtown, NY (Long Island)
    Posts
    65

    Re: Questions on variable speed pump program

    no solar cover, which i know will help. i was going to purchase one but because my pool is oddly shaped I would have to buy a rectangular one and cut it to fit. I figured it would make putting it on and removing it each day (plus storing it) a bit more of a chore than its worth.I have friends who have a bar going across the deep end where they can roll it not each day but they have a rectangle so it is much easier.
    ~30,000 Gallon Free Form Pool; IG; Vinyl; DE Filter; Installed 2005

  12. Back To Top    #12
    mas985's Avatar
    Join Date
    May 2007
    Location
    Pleasanton, CA
    Posts
    11,490

    Re: Questions on variable speed pump program

    This is what I did to make it easier and can work for nearly any shaped pool: DIY Solar Cover Roller

    A cover will save you a ton of money in both heating and pump run time costs.
    Mark
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, MaxFlo SP2303VSP, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

  13. Back To Top    #13
    Mod Squad pooldv's Avatar
    Join Date
    Aug 2012
    Location
    DFW, TX
    Posts
    23,999

    Re: Questions on variable speed pump program

    +1 to that. I have been resisting the solar cover for years due to perceived difficulty of dealing with it. I finally got one this year and, as usual, I was wrong. Again. It makes a huge difference in heat retention. There is a bit of a learning curve with taking the cover off and on. But, it takes less than 15 minutes even if you're bad at it. It also significantly reduced FC demand and virtually stopped PH rise.
    TFP Moderator
    If TFP helped you or saved you money - Become a TFP Supporter! <--Click here
    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •