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  1. #1
    Join Date
    Jul 2012
    Location
    Australia
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    50
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    51
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    6

    Tx valve equalizer freezing



    hello
    I have a system not feeding evaporator properly the equalizer line is frosted up it seems liquid refrigerant is leaking into it. Has anyone experienced this problem before?



  2. #2
    Join Date
    Aug 2009
    Location
    New Zealand
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    53
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    2,556
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    20

    Re: Tx valve equalizer freezing

    Was quite common on older valves, not some thing you see as common nowadays.

    If the TXV bulb is fitted after the equalising line, a passing valve will cause the the valve to close prematurely.

    The equalising line must be after the bulb (on the suction)

  3. #3
    Join Date
    Jul 2012
    Location
    Australia
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    50
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    6

    Re: Tx valve equalizer freezing

    Thanks for you reply.
    The equalizer line is upstream of bulb sensor and the evap is starved ..icing up the 1 st part of the coil..The eqaulizer line is freezing ....Looks like tx valve faulty...is it worth checking anything else out?

  4. #4
    Join Date
    Sep 2003
    Location
    ISRAEL
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    65
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    4,109
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    37

    Re: Tx valve equalizer freezing

    TXV is faulty, replace it.

  5. #5
    Join Date
    Mar 2012
    Location
    italy
    Age
    60
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    75
    Rep Power
    6

    Re: Tx valve equalizer freezing

    replace the shutter of the expansion valve.

  6. #6
    Join Date
    Jun 2009
    Location
    Northumberland UK
    Posts
    11
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    0

    Re: Tx valve equalizer freezing

    Change valve - it's passing internally

  7. #7
    Join Date
    Aug 2007
    Location
    Adelaide Australia
    Age
    63
    Posts
    538
    Rep Power
    17

    Re: Tx valve equalizer freezing

    Hi RBM
    If the TX is only a small do as chemi-cool suggests and change it. If the seals leak on the pin or pins depending on the make and type of valve, liquid will get to the equalizer line. On some valves these seals can be replaced, as with Sporlan DA and AA valves but it's probably not worth it.
    When you install a new TX valve make sure you check the superheat setting and if possible place the sensing bulb between the evap outlet and the equalizer line.
    Paul

  8. #8
    Join Date
    Nov 2003
    Location
    holland europe
    Age
    59
    Posts
    76
    Rep Power
    15

    Re: Tx valve equalizer freezing

    In the tx valve is a small o ring on the stem to isolate the bottom membrane from the outlet of the valve, to get external equalisation.
    this o ring is faulty, so needs replacement. Now some liquid from the valve goes thru the line and gets into the suction line.
    computer shooter
    paul deelen
    +31653300739

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