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Thread: Which one of these is AirCon refill?

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    Regular Member danlat1415's Avatar
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    Question Which one of these is AirCon refill?

    I mentioned earlier that I was going to refill my Air Conditioning coolant. I've bought a refill with guage, and I'm supposed to connect to the LOW PRESSURE PIPE of the air-con.
    I've just fitted a K&N air filter, so I took this picture.
    Which one of these is the LOW PRESSURE PIPE?

    A or B

    A is quite a thick pipe.
    B is a thin pipe.

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    [Ex]Admin Duncan's Avatar
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    Pipe A looks like Low Pressure to me. Which engine is yours? - just so I can double check on TIS.

    D

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    Regular Member danlat1415's Avatar
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    It's the 1.8 SXi - 52 plate

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    Yep, definitely Pipe A as per your diagram. Your car needs 730g of refrigerant. Be careful though - since you don't know how much is still in there, it's going to be very easy to overfill and you won't know. Last thing you want is any stuff squirting out if it overfills!

    D

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    Regular Member danlat1415's Avatar
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    hopefully that won't happen, the refill kit has a guage which apparantly tell you how much you've got? hmm but wouldn't that go off pressure?
    Do you know what pressure it should be at? I know it's 730g theres a big sticker just under the bonnet with some info on.

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    [Ex]Admin Duncan's Avatar
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    Quote Originally Posted by danlat1415
    hopefully that won't happen, the refill kit has a guage which apparantly tell you how much you've got? hmm but wouldn't that go off pressure?
    Do you know what pressure it should be at?
    I've got no idea what pressure, or how that canister works i.e. how it (if indeed it can) tells how much you've already got in the system.

    D

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    Regular Member Ian's Avatar
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    problem with pressure is its temperature dependant, whereas teh weight doesnt change. Depending on how temperature effects these recon gases may result in it never being possible to do with a pressure gauge?

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    Good point!

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    All refrigeration engineers use pressure guages to see what the system is doing..the refridgerant is charged in the liquid (by grammes) and gaseous phases..so the tiny aerosol with it's little guage will prob tell you if there is enough of the gaseous phase to let the system run again.. if it's low though, i'd still get it profesionally leak checked..

    Deffo pipe A for the low pressure side mate..


    ( info from my mate the commercial fridge engineer via text message..lol)

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    You could always evacuate the system and then add the required amount. Keep weighing the refill can, until it has lost the right amount. Assuming no leakage of course.

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