pre heat geyser configuration




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  1. #1
    Join Date
    May 2013
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    Default pre heat geyser configuration

    Hi all

    I have had my solar water setup in for nearly 2 months now and have already realised a saving of between 40-50% over previous months by the looks. This was with an old 100l low pressure drum geyser.
    Setup was done by an East London based outfit and is fine. They are very competent and have done 2 other houses on the farm with perfect results.

    I have 150lt Heattech on the roof which is mains supplied thermosyphon and gravity feeds into a 150lt Heattech in my ceiling space which is the house supply tank. This has the element connected and is on a timer (1 hour morning 5pm, 1 hour late arvo 3pm and 1 hour evening 7pm)

    Now my question or dilemma.
    The water from my supply tank is used and is replaced with preheated water from the feed tank which is great and what I wanted.
    But, now i wonder if its possible to circulate the water from the supply tank into the feed tank to constantly heat ALL the water during the day effectively giving me a full 300l hot water at the end of the day.
    Or am I chasing pie in the sky?
    Hyundai ix35 2.0 crdi 4wd (Current, untill i get a proper 4x4 again )
    The Firetruck: Isuzu KB360 V6 4x4 (Sold)

  2. #2
    Join Date
    Dec 2014
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    Default Re: pre heat geyser configuration

    A change in plumbing configuration and a 220V pumped system with a Geyserwise should be able to do that for you.
    Call your installer and ask them about it.
    Cheers,
    John

    Rover P6
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  3. #3
    Join Date
    Jan 2012
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    Default Re: pre heat geyser configuration

    I am also curious to know.I asked kwikot and they said I should leave as is. My setup is the same as yours .Hoping for a second opinion.

  4. #4
    Join Date
    Jan 2014
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    Default Re: pre heat geyser configuration

    Mine has been working like this for over 5-years.
    Adjusted the main geyser thermostat to max 55 deg.
    I have a controller opening the cold water supply at in morning at 9 and the at 12.
    By the evening the solar is still hot, feeding the main geyser.
    Put an LED light on main geyser to see when it comes on, which is very seldom.

    Now I am off the grid.

  5. #5
    Join Date
    Feb 2011
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    Kuilsrivier
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    Default Re: pre heat geyser configuration

    The idea is good, but the problem might be the distance between the 2 units.
    If it is very long and your pipes is not insulated, you might have too much heatloss when the water is circulated.
    Rather go for a single bigger tank?


    2007 Nissan Navara 4L Auto - Worshond


  6. #6
    Join Date
    Oct 2006
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    Default Re: pre heat geyser configuration

    I would also leave it as is,


    ORA
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    Ian

  7. #7
    Join Date
    May 2013
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    Default Re: pre heat geyser configuration

    I like the idea of an LED. Kinda have one already on the prepaid meter which flashes when drawing watts. One Watt one flash so its a good indicator. And it seems thinhs are working rather efficiently as it hasnt been flashing too much.

    Ill keep an eye on things and have a look as time passes and reasses. But seems the consensus is dont fiddle. Kinda dont scratch where there is nonitch guess.

    Although thought is being given to a small gas water heater for the kitchen. Todays dishes were washed in luke warm water. Wasnt good stuff.
    Hyundai ix35 2.0 crdi 4wd (Current, untill i get a proper 4x4 again )
    The Firetruck: Isuzu KB360 V6 4x4 (Sold)

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