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  1. #27
    Join Date
    Sep 2005
    Location
    florida
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    5,512
    Quote Originally Posted by Lennyb View Post
    I did try and turn off the TXV's cap, but I didn't have room to get any wrenches on it. It has been replaced sometime before and adjusting TXV obviously wasn't on the installers adgenda. It is an externally equalized TXV with a removeable power head. I wanted to open up TXV some but like I said impossible to get a wrench on it. I will try later when Im back to the Unit with a socket.

    It's attached with copper and the last time I did one the copper bends real easy.
    I love the smell of phosgene first thing in the morning:

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  2. #28
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    68,125
    Depends how cold the freezer is, and what temp it is outside. Mild temp day, 230 head, -10 in the box, 16.
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    How many times must one fix something before it is fixed?

  3. #29
    Join Date
    Feb 2012
    Posts
    21
    16 PSIG on suction line in good all around conditions? Which would be about -22 on Gauge? So for a SH of 18-20 that means Im looking for a suction line temp of about zero??? Doesn't sound right!!! That would surely freeze up suction line and compressor etc.

    SH=Suction line Temp - Evap temp

    Or I thought
    Last edited by Lennyb; 08-13-2012 at 07:39 PM. Reason: Adding txt

  4. #30
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    68,125
    You don't work on freezers often, do you?
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  5. #31
    Join Date
    Sep 2005
    Location
    florida
    Posts
    5,512
    Quote Originally Posted by Lennyb View Post
    16 PSIG on suction line in good all around conditions? Which would be about -22 on Gauge? So for a SH of 18-20 that means Im looking for a suction line temp of about zero??? Doesn't sound right!!! That would surely freeze up suction line and compressor etc.

    SH=Suction line Temp - Evap temp

    Or I thought


    Oh Boy.
    I love the smell of phosgene first thing in the morning:

    To apply for professional membership click here


    Educational forums are open.

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  6. #32
    Join Date
    Sep 2008
    Location
    Western PA
    Posts
    25,692

  7. #33
    Join Date
    Mar 2009
    Location
    Mid-Mo
    Posts
    3,595
    If only I could paid extra for those "froze up" calls where the accumulator has ice on it....I could probably afford that nice Caribbean vacation the wife has been wanting for 2 years!

    Don't sweat the ice....you're in the home stretch now. sounds like you have the problem narrowed down, seal the deal.

  8. #34
    Join Date
    Apr 2001
    Location
    MINN
    Posts
    938
    Is there a stainer on that TEV?

  9. #35
    Join Date
    Jul 2012
    Location
    Western KY
    Posts
    1,221
    Quote Originally Posted by Lennyb View Post
    16 PSIG on suction line in good all around conditions? Which would be about -22 on Gauge? So for a SH of 18-20 that means Im looking for a suction line temp of about zero??? Doesn't sound right!!! That would surely freeze up suction line and compressor etc.

    SH=Suction line Temp - Evap temp

    Or I thought
    SH 18-20? Ok don't be offended but you are not looking for the right numbers the right way. SH is the difference between saturated suction temp and actual suction temp and it should be 6-10 at the TXV bulb on a WI freezer. Agin don't be offended I'm not picking just wanna get you goin in the right direction.

  10. #36
    Join Date
    Jul 2012
    Location
    Western KY
    Posts
    1,221
    Also don't worry about frosting of the suction line it's going to happen if not insulated because the line temp will be well below 0 on a -10 degree box. The comp will not freeze up if charge and SH are correct.

  11. #37
    Join Date
    Feb 2012
    Posts
    21
    No mostly heat pumps and coolers

  12. #38
    Join Date
    Feb 2012
    Posts
    21
    So your saying that the Evap line temp at the TXV bulb should be 6-10 for a 404a freezer? Also maybe im just slow but I was under the impression I understood SH

  13. #39
    Join Date
    Feb 2012
    Posts
    21
    With R22, 410A, and coolers with 414B, 409A, and 404a. Only 3 freezers on property.

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