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Thread: Air in returns from solar after start up each time.

  1. Back To Top    #1

    Join Date
    Mar 2007
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    Ontario
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    Air in returns from solar after start up each time.

    Hello,

    I have read here that you should let your panels drain after use, to prevent damage.

    When I let them drain I get about 1 minute of air blowing through the returns on start-up.
    Can the air in the lines do damage? I can feel the vibrations on my feet when I stand near
    the returns. Its loud and I feel a little nervous.
    Thanks!!
    16x32 inground vinyl 8' deep end
    1hp Northstar Pump, 20" Sand Filter
    6ft Double Lounge, 2 Aqua Lamps w/remote
    216sqft Sungrabber Panels (9- 2'x12') a little undersized

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    DaveNJ's Avatar
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    Toms River, NJ
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    Re: Air in returns from solar after start up each time.

    Do you have an Air Purge Valve in your solar setup. More information about your setup would help.
    IG 18x36 oval vinyl, Spill over spa, Northstar 2hp-2spd, 2.5" piping, S310T 500lb Sand filter, 400k gas heater, AutoPilot SWCG
    http://www.tftestkits.net/

  3. Back To Top    #3

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    Ontario
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    Re: Air in returns from solar after start up each time.

    Not that I can see. Would it be near the valve to turn on the solar?
    Is it like the valve on an air compressor that lets the air out?

    I guess my question is it normal to have that much air in the lines?

    My panels are roof mounted on to different roofs, with a (forget the name)at
    the highest point to alow for drainage. I have a total of 9 12x2's. They are on a
    25' run from the pump and about 15' up.

    Thanks
    16x32 inground vinyl 8' deep end
    1hp Northstar Pump, 20" Sand Filter
    6ft Double Lounge, 2 Aqua Lamps w/remote
    216sqft Sungrabber Panels (9- 2'x12') a little undersized

  4. Back To Top    #4
    DaveNJ's Avatar
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    Re: Air in returns from solar after start up each time.

    This link is an illustration of parts of solar setup. I called it a air purge, or vacuum relief valve.
    IG 18x36 oval vinyl, Spill over spa, Northstar 2hp-2spd, 2.5" piping, S310T 500lb Sand filter, 400k gas heater, AutoPilot SWCG
    http://www.tftestkits.net/

  5. Back To Top    #5

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    Ontario
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    Re: Air in returns from solar after start up each time.

    I don't see the link. Thats what I have at the highest point is a vacuum
    releif valve. I forgot the name till I read it here.
    Thanks
    16x32 inground vinyl 8' deep end
    1hp Northstar Pump, 20" Sand Filter
    6ft Double Lounge, 2 Aqua Lamps w/remote
    216sqft Sungrabber Panels (9- 2'x12') a little undersized

  6. Back To Top    #6

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    Jun 2007
    Location
    Charleston, SC
    Posts
    151

    Re: Air in returns from solar after start up each time.

    That is normal.

    When your solar shuts off, the vacumn breaker will allow the panels to drain (and fill with air).

    WHen the pump starts pushing water through the panels, the vacumn breaker closes and the air has to go somewhere, so through your returns it is .

    Shouldn't harm a thing.
    18' Round ABG (8000 gallon)
    Hayward X-Stream Cartridge Filter
    1.5hp Hayward PowerFlo Matrix Pump
    80 sq. ft. solar panels
    Goldline automated solar controller

  7. Back To Top    #7

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    Mar 2007
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    Ontario
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    Re: Air in returns from solar after start up each time.

    When you put it that way it makes perfect sence. I guess I am a nervous Nancy.
    Thanks for the replies.
    16x32 inground vinyl 8' deep end
    1hp Northstar Pump, 20" Sand Filter
    6ft Double Lounge, 2 Aqua Lamps w/remote
    216sqft Sungrabber Panels (9- 2'x12') a little undersized

  8. Back To Top    #8
    DaveNJ's Avatar
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    May 2007
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    Toms River, NJ
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    Re: Air in returns from solar after start up each time.

    Sorry about the link:
    http://www.powermat.com/
    IG 18x36 oval vinyl, Spill over spa, Northstar 2hp-2spd, 2.5" piping, S310T 500lb Sand filter, 400k gas heater, AutoPilot SWCG
    http://www.tftestkits.net/

  9. Back To Top    #9
    dayhiker's Avatar
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    Jun 2008
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    Pell City, AL
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    Re: Air in returns from solar after start up each time.

    Freaked me out too at first. The only way to prevent it was to change things over to non solar operation just before the pump timer cuts off which defeats the purpose of the timer so I decided that it must just be the way it had to be.
    The avatar is Spalding from Caddyshack
    18x36 vinyl IG - approximately 24000 gal
    Jandy SHPM1.5 Pump (1.5 HP); Jandy APURE 1400 SWG; Polaris PB4-60Q Booster Pump; Jandy CL340 Cartridge Filter
    (3) 4'x12' Aquatherm solar panels
    Next project, pump sound enclosure and lots of pool landscaping [6tons of stone 8) funnnn]

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