Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 11 of 11

Thread: Will this Solar Panel Control work?

  1. Back To Top    #1

    Join Date
    Apr 2009
    Location
    Lebanon, TN
    Posts
    19

    Will this Solar Panel Control work?

    I am in the process of getting my solar panel system up and running. I have purchased a pair of 2x20 sun grabber's to go with the pair that were laying in the yard waiting to be put on the roof. I also purchased a Goldline GL235 control assembly. Attached is a diagram of what I have in mind, 1st will it work and do you see any thing that you would do different? I wrote on the bottom of the page that I might put two more valves to the right of the 3-way valve and to the right of the cross. Also I plan on having a vacum breaker on top as well as drains where they go up to the roof. I will remove the panels from the roof in the fall, to make them last longer and I may remove the valve system, that is why I have unions on all branches of it.

    Thanks Keith
    Attached Images Attached Images
    24' x 52" AG All Aluminum
    2hp 2speed 200sf Cartridge Filter
    Goldline AquaTrol
    4- 2x20 Sungrabber solar panels
    Goldline solar controler

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: Will this Solar Panel Control work?

    Take a look at the diagram at Hot Sun Industries Inc. That is very similar to your setup, but connects the solar return above the shutoff valve. Their setup is the standard way it is usually done. There are other approaches, some of which are just slightly simpler, but their setup has several advantages.
    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

  3. Back To Top    #3

    Join Date
    Apr 2009
    Location
    Lebanon, TN
    Posts
    19

    Re: Will this Solar Panel Control work?

    That is what I tried to copy. I think I have it, see if this makes sense. If I replace the cross below the 3-way valve with a T and come up above that T with another one for my water coming from the solar panels it should keep the water flowing better and not cause the water coming from the by pass to be dead heading straight in to the water from the panels.
    24' x 52" AG All Aluminum
    2hp 2speed 200sf Cartridge Filter
    Goldline AquaTrol
    4- 2x20 Sungrabber solar panels
    Goldline solar controler

  4. Back To Top    #4
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: Will this Solar Panel Control work?

    The real difference is to move the solar return line up so it is above the shutoff valve.
    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

  5. Back To Top    #5

    Join Date
    Apr 2009
    Location
    Lebanon, TN
    Posts
    19

    Re: Will this Solar Panel Control work?

    If someone can draw up a diagram for me I would greatly appreciate it. I am posting a picture of the valve system I had made up before i decided to get the controler, I am planning to scrap it and start over. You can see in the picture that the panels are going to be to the right of the pump system.
    Thanks
    Keith
    Attached Images Attached Images
    24' x 52" AG All Aluminum
    2hp 2speed 200sf Cartridge Filter
    Goldline AquaTrol
    4- 2x20 Sungrabber solar panels
    Goldline solar controler

  6. Back To Top    #6

    Join Date
    Apr 2009
    Location
    Lebanon, TN
    Posts
    19

    Re: Will this Solar Panel Control work?

    Jason
    I have thought about this until I am about to go crazy. LOL I think this is more in line with what is on powermat. Will you please confirm and if you see anything that will work better let me know.

    Thanks
    Keith

    The three way valve is the square above the left isolation valve. I forgot to label it.
    Attached Images Attached Images
    24' x 52" AG All Aluminum
    2hp 2speed 200sf Cartridge Filter
    Goldline AquaTrol
    4- 2x20 Sungrabber solar panels
    Goldline solar controler

  7. Back To Top    #7

    Join Date
    May 2007
    Location
    Mantua, NJ
    Posts
    80

    Re: Will this Solar Panel Control work?

    Keith,

    I'm not sure if you need the bypass connection and the check valve on the right, on the solar return. Your three-way valve will prevent water from going the wrong way into the solar return. When the solar is off, again the three-way will act as the bypass path. I just have 1 check valve which is right after the filter.

    Make sure the three-way is the kind with the small hole in the gate to allow self draining of the panels.
    Joe

    21k IG vinyl, 300 lb. sand filter, 1hp pump, Polaris 280 cleaner, 3/4hp booster pump, 240sq ft Fafco solar, Liquidator

  8. Back To Top    #8
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: Will this Solar Panel Control work?

    The isolation valves need to be above the bypass valve on the vertical edges of the square of pipe. Everything else looks correct. The way you have it drawn right now the panels can't be isolated when the pool is running.

    Having both check valves is a very good idea, though not strictly required. One prevents the system from draining through the filter and pushing dirt back into the pool and the other keeps pressurized water from going back up the solar return line when the solar system is turned off, which allows the panels to remain drained when they are off.

    Likewise the bypass pipe is not strictly required, the three way valve could be used to perform the same task. However, keeping the extra bypass pipe makes it much simpler to service the solar system. Once the bypass is turned on and the solar is isolated everything, including the automated three way valve can be worked on. Without the separate bypass you can't service the three way valve when the pool is on.
    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

  9. Back To Top    #9

    Join Date
    May 2007
    Location
    Mantua, NJ
    Posts
    80

    Re: Will this Solar Panel Control work?

    Jason,

    Good point about servicing the three-way and having the bypass pipe. Since I have a low tech(manual) valve, didn't see the need for it on my system. But you make a good case for one.
    Joe

    21k IG vinyl, 300 lb. sand filter, 1hp pump, Polaris 280 cleaner, 3/4hp booster pump, 240sq ft Fafco solar, Liquidator

  10. Back To Top    #10

    Join Date
    Apr 2009
    Location
    Lebanon, TN
    Posts
    19

    Re: Will this Solar Panel Control work?

    Are the two 90degree bends to the left of the three way valve going to have much effect on pressure? I couldn't figure out any way to get around it the way I have to lay it out.
    24' x 52" AG All Aluminum
    2hp 2speed 200sf Cartridge Filter
    Goldline AquaTrol
    4- 2x20 Sungrabber solar panels
    Goldline solar controler

  11. Back To Top    #11
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: Will this Solar Panel Control work?

    Not really. Each bend in the pipe has a very small effect. Adding a dozen 90s will have an impact, but the effect of one or two is minimal.
    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

Posting Permissions

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