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Thread: Previous tech said everything is fine

  1. #21
    Join Date
    Sep 2002
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    29,148
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    TXV forced full open - charge to target SSH - what could go wrong? <g>

    Hell; I know an AC tech in Florida who says about TXV's - "wool; ah jus let 'er swang baby'.

    "Takes all kinds" has maybe never been more true, eh? <g>


    PHM
    ---------


    Quote Originally Posted by AIRCON8 View Post
    Attachment 817925Attachment 817925

    But system not cooling well.
    PHM
    --------
    The conventional view serves to protect us from the painful job of Thinking

  2. #22
    Join Date
    May 2011
    Location
    romulus, mi
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    Quote Originally Posted by kdean1 View Post
    Plenty of thermal conductivity with a cable tie, too!
    I've seen them factory shipped using zip ties

    Sent from my GM1915 using Tapatalk
    RTB Mechanical
    734-315-0064
    http://rtbmechanical.com

  3. #23
    Join Date
    May 2018
    Location
    FLORIDA
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    Thread Starter
    This one was among the really bad i ever found
    Visit our website at www.airconcomfortcooling.com

  4. #24
    Join Date
    May 2006
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    3,769
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    i could see doing this as a temp fix but do it the right way afterwards

  5. #25
    Join Date
    Oct 2014
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    Just add “a pound or two” and it’ll be fine.

    Freezon fixes everything


    Sent from my iPhone using Tapatalk

  6. Likes R600a liked this post.
  7. #26
    Join Date
    May 2018
    Location
    FLORIDA
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    Thread Starter
    Quote Originally Posted by UrAverageAguy View Post
    Just add “a pound or two” and it’ll be fine.

    Freezon fixes everything


    Sent from my iPhone using Tapatalk
    No need for a txv in this case LOL
    Visit our website at www.airconcomfortcooling.com

  8. #27
    Join Date
    Jan 2005
    Location
    Houston TX
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    998
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    You guys have mo idea what you are looking at; that is a sub-cooling modulation valve sensing bulb, so it has to be on the liquid line.
    Once in a while everything falls into place and I am able to move forward, most of the time it just falls all over the place and I can't go anywhere-GEO

  9. #28
    Join Date
    Sep 2002
    Posts
    29,148
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    I repaired a comfort cooling job where they were replacing 500 ton screw compressors every few years. All DX coils stacked in gigantic plenums. I guess the coils were 40-50 tons each - with a single TXV on each coil.

    All day the system ran fine, and all summer it ran fine - spring and fall mornings it would slug liquid so bad the screw sounded like it was going to stall the 500HP drive motor. Nobody could figure it out and what the hell; who doesn't like selling 500 ton compressors. <g> Willard Mechanical out of Philadelphia had had the contract for many years.

    Turned out that the original installation fitters had attached all the TXV bulbs with perforated strap iron. When the straps rusted off - the TXV bulbs had dropped down into the condensate pans. So on a dry startup the TXV's were wide open on return air temp. As soon as the coils started working and filled the drain pans with condensate - the bulbs started sensing the water instead of the return air and the SSH came right into line.

    <g>
    PHM
    --------
    The conventional view serves to protect us from the painful job of Thinking

  10. Likes R600a, CHAINIK liked this post.
  11. #29
    Join Date
    Oct 2014
    Location
    Saint Pail, Minnesota
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    I’m more of a fan of using blue painters tape. I know a guy that works for Sherwin Williams. Way cheaper than traditional straps.

  12. Likes R600a liked this post.
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