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Thread: trane troubles

  1. #1
    Join Date
    Apr 2008
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    Greenwood Lake, ny
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    50

    Confused trane troubles


    I am learning the trade, and my boss is giving me jobs.
    Is trane XL1200 superheat or subcooling.
    I am trying my best,I want todo it correctly not half ass.
    How do you know if you have a piston,tev,and a txv
    I know piston is sh , but getconfussed with tev sh or sc
    Know txv is sc. PLEASE HELP

  2. #2
    Join Date
    Jan 2008
    Location
    Wisconsin
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    1,125
    Quote Originally Posted by kw10925 View Post

    I am learning the trade, and my boss is giving me jobs.
    Is trane XL1200 superheat or subcooling.
    I am trying my best,I want todo it correctly not half ass.
    How do you know if you have a piston,tev,and a txv
    I know piston is sh , but getconfussed with tev sh or sc
    Know txv is sc. PLEASE HELP
    Ask your boss. He should be willing to help you learn if you're a newbie.

  3. #3
    Join Date
    Dec 2007
    Location
    houston, texas
    Posts
    3,787
    sounds like you still need to be riding along with someone so you can get some ojt.
    I'm not tolerating Political Correctness anymore, from now on it's tell it like it is.

    Veto Pro Pak - The best tool bag you'll ever own






  4. #4
    Join Date
    Mar 2004
    Location
    Grottoes VA
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    5,856
    TXV and TEV are the same thing, just a different abbreviation. You need to know both SH and SC on both types of systems.
    Karst means cave. So, I search for caves.

  5. #5
    Join Date
    Apr 2008
    Location
    Alberta Canada
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    2,246

    Why do you need SH on TXV

    I don't need SH on TXV just SC and on piston vice versa. I must be magical.
    Quote Originally Posted by karsthuntr View Post
    TXV and TEV are the same thing, just a different abbreviation. You need to know both SH and SC on both types of systems.
    Do it right the first time.

  6. #6
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    SH, and SC are both taken on both types of metering devices. They are diagnostic readings.
    12*F SC on a TXV doesn't mean your charge is correct if you have 37*F SH.
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  7. #7
    Join Date
    Apr 2008
    Location
    Greenwood Lake, ny
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    I told him but still sends me on my own
    I ask to go with someone but doestnt
    says i should know it after going to different class
    this not the say as ojt

  8. #8
    Join Date
    Feb 2005
    Location
    Massachusetts
    Posts
    305
    The real question is, once you 'think' you know the answer, are you not going to look at the charging chart? (pst... i just gave you the answer, the chart will tell you

    If you don't have a grip on what loads (or lack of load) both coils are seeing, you're just better off grabbing a bucket and staring at the condenser

    I gotta ask, does your boss know the answer?

  9. #9
    Join Date
    Dec 2007
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    houston, texas
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    looks like he is throwing you to the wolves. Thats one way to learn. Sorta haphazzard but if you keep your head together you can make it work.
    I'm not tolerating Political Correctness anymore, from now on it's tell it like it is.

    Veto Pro Pak - The best tool bag you'll ever own






  10. #10
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    Apr 2008
    Location
    Alberta Canada
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    I don't even have super heat on my ruler

    If I have a liquid pressure of 280 and od temp 80 all I need is indoor wet bulb before coil and sub cooling, I do check to make sure I have close to 20 Delta Temp across coil. I only use super heat on non TXV. I have just gotten use to doing it that way. I do look at suction pressures just not super heat. This is for new Installs only. Servicing is different many more variables.
    Quote Originally Posted by beenthere View Post
    SH, and SC are both taken on both types of metering devices. They are diagnostic readings.
    12*F SC on a TXV doesn't mean your charge is correct if you have 37*F SH.
    Do it right the first time.

  11. #11
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    If you were "magical" you would have won't the lottery by now and be retired.

    What refrigerant are you running 280 head at OD 80*F.
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  12. #12
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    It was just an example

    We are lucky if we get 80 weather but if using r-410 it would be high 300.
    Quote Originally Posted by beenthere View Post
    If you were "magical" you would have won't the lottery by now and be retired.

    What refrigerant are you running 280 head at OD 80*F.
    Do it right the first time.

  13. #13
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    PA
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    You must be using low SEER equipment running such high heads.
    80*F OD temp 280 PSI with a TXV, is an over charged system around here.
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    How many times must one fix something before it is fixed?

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