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  1. #1
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    Charging a Absorption Fridge.


    OK Guys.
    I suppose I should know the answer to this question, however truth is I have not got a clue.
    I have a friend that has an Ammonia charged fridge which he wishes to install on his motor boat.
    I know from the quick look I had at the fridge there is a 1/2" bsp fitting so a std charging hose would fit.
    But as we all know this side of the "black art" is rarely covered.
    Any thoughts anyone?
    Grizzly



  2. #2
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    Re: Charging a Absorption Fridge.

    send it to kompulsa for repairsaves you buying steel gauges

  3. #3
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    Re: Charging a Absorption Fridge.

    Quote Originally Posted by Grizzly View Post
    OK Guys.
    I suppose I should know the answer to this question, however truth is I have not got a clue.
    I have a friend that has an Ammonia charged fridge which he wishes to install on his motor boat.
    I know from the quick look I had at the fridge there is a 1/2" bsp fitting so a std charging hose would fit.
    But as we all know this side of the "black art" is rarely covered.
    Any thoughts anyone?
    Grizzly
    Hi Griz the fluid is not pure Ammonia.
    There is water and Hydrogen mixed inside also, so
    obtaining the fluids would be the hardest and then the next
    would be mixing them in the correct quantities.


    All the best

    coolrunnings

    .

  4. #4
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    Re: Charging a Absorption Fridge.

    Grizz

    Are you sure the solution hasn't just separated? turn it upside down and put in the back of the van while you're out on service calls, works a treat!! Other wise get on ebay to see if there are any 12 or 24v dc fridges on the go.

    al
    Mostly found in the southern part of this green and pleasant land.

  5. #5
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    Re: Charging a Absorption Fridge.

    arent you meant to tip it on its side for a while,then upside down then on the otherside- basically as al says throw it about a bit!
    Quote Originally Posted by al View Post
    Grizz

    Are you sure the solution hasn't just separated? turn it upside down and put in the back of the van while you're out on service calls, works a treat!! Other wise get on ebay to see if there are any 12 or 24v dc fridges on the go.

    al

  6. #6
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    Re: Charging a Absorption Fridge.

    Have a hospital with a few of these, maintenance ring for me to collect and drive around with them for a day or two!!
    Mostly found in the southern part of this green and pleasant land.

  7. #7
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    Re: Charging a Absorption Fridge.

    Grizzly,
    As cool running says, its a mixture of water, hydrogen and ammonia.

    i dont know about the mixture relations, but if there is no leak, turn it upside down for a few days and chack that the heating element works ok.
    http://www.gasrefrigerators.com/faq/...igerators-work

  8. #8
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    Re: Charging a Absorption Fridge.


    A temporarily unused absorption unit may not
    freeze. Make sure the burner is lit or the heater is working
    If the bumer is lit, the problem is likely due to blockage
    within the unit. Manufacturers recommend tilt the to remove
    the blockage.After l0 minutes of operation,tilt the
    refrigerator to the right for about 30 seconds. then tilt it
    to the left for 30 seconds- Do this three to four times,
    then put the unit back in the upright, level position. If it
    still does not cool, replace the cooling unit

  9. #9
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    Re: Charging a Absorption Fridge.

    There is a problem with using a fridge of this nature on a boat as the fridge has to be level to operate. If it is level and there is enough heat from the burner/element then the pump/boiler tube is blocked with rust or scale, inverting the cooler sometimes will clear the blockage, if not the boiler tube will have to be replaced and the unit recharged with a mixture of ammonia, distilled water with rust inhibiter and then pressured with hydrogen. A custom charging rig will have to be built to pull a vaccum and measure the volumes of the liquids charged and then the pressure of the hydrogen, no brass or copper. If you want send me the dimensions of the reciever and I will calculate the required charge. Idealy though it is best left to someone who does this every day as it is a mission for a once off.

  10. #10
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    Re: Charging a Absorption Fridge.

    Ah! Someone schooled in the Black Art!
    (I assume it's relevant to your age?)
    Thanks for your kind offer Graham. I will stick to the agitate method as recommended by the Guys, now that I am aware of the issues involved.
    Thanks All.

    Grizzly

  11. #11
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    Re: Charging a Absorption Fridge.

    Hi Grizzly. if there was no hint of ammonia in the air, as there has been when customers ask me about their camping fridge, then the above posts recommending inverting and transporting on a bumpy road seems to work.
    ( Sometimes).. From what i have heard, ammonia crystals form from lack of use and plug a pipe...somewhere.

    Other problems is the loss of the "crown effect" on the LPG flame. Blue flame with orange peaks for optimum heat. orange flame only, is too cold.. Debris in the jet, (orifice), or carbon choking the burner?
    Incorrect or faulty bottle regulator may cause low supply pressure.
    Check the flu has the removable heat dissipation spiral thingy in there and it is not caked up with debris, like a hornet's mud nest.
    As for charging it up..i have no idea. Only a few specialist locations over here know how to do that. Hope this helps..Mike.
    To the optimist, the glass is half full. To the pessimist, the glass is half empty.

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