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  1. #1
    Join Date
    Nov 2006
    Location
    North Carolina
    Posts
    130

    Trane RTU txv retrofit

    Someone posted pictures of a retrofit they did probably a year ago, I have searched it and can not find it. Anyway I have a 7.5 ton Trane rtu that has a stopped up orifice header. I have ordered a new header 6 weeks ago and cant seem to get one in, but thats another story. I was thinking about putting a txv on it but wasnt exactly sure how to do it. The part I am not sure about is after the txv what size tubes go to the evaporator coil and how do you tie them in to the txv. This is a small rtu with one circuit and about 8 orifices on the header. The unit is not used in june or july it is on a school but I have to get this fixed before school starts back. If anyone has done this before or can find that old post I would appreciate the help.

    Thanks in advance

  2. #2
    Join Date
    Jun 2009
    Location
    Midwest
    Posts
    64
    We've done quite a few of these but it's trully a pain. Trane uses the same evaporator on TXV and orifice equipped units. Just go to Trane Parts Center and order a replacement distributor/tube assembly and a TXV for your 7.5T. If your parts center is friendly and knowledgable they should be able to help you.

  3. #3
    Join Date
    Oct 2006
    Location
    Colorado Springs.
    Posts
    25
    Check out this previous post. The second page has pictures of the conversion:
    http://hvac-talk.com/vbb/showthread....=trane+sporlan

    I have also attached a pdf explaining the procedure for installing a TXV. Hope it helps.
    Attached Images Attached Images
    Just tell 'em I meant well.

  4. #4
    Join Date
    Jan 2007
    Location
    Charm City--the city that bleeds
    Posts
    2,790
    Just did a header replacement. It takes 6 days for them to make it. Customer was not happy.
    I wish I had just gone out and bought the right TXV.
    Anyway, the new header worked fine--nearly two weeks after I ordered it.

    I'm just wondering how long until the other circuit clogs the orifices. It had the same blanket between the condensers as stage two.
    It's great to be alive and pumping oxygen!

  5. #5
    Join Date
    May 2009
    Location
    In the Hudson Valley of New York
    Posts
    1,927
    You can always make you own distributor, just use equal lengths of 3/16 or 1/4 inch tubing, figure on placing the valve in the middle of the coil utube side, and make all the tube long enough to get to the top or bottom in equal length. You can have the unit up and running in a couple of hours with some copper, txv and a torch.

  6. #6
    Join Date
    Mar 2008
    Location
    USA
    Posts
    68

    txv retrofit

    hey there chad nc just had to do this last week to a trane tcd151 yes 3/16 refrigeration tubing works great 50 foot roll should get you done for one circuit i just made my own distributor got a 7/8 to 1 3/8 bushing reducer and a 1 3/8 cap and drilled 3/16 holes as previously stated make sure all your distributor lines are equal length

  7. #7
    Join Date
    Jan 2011
    Location
    North Carolina
    Posts
    20
    Just get one of your fellow employees to do it for you, particularly a younger gentlemen....chances are....he's smarter than you.

  8. #8
    Join Date
    May 2004
    Posts
    12,027
    Quote Originally Posted by ChillTek NC View Post
    Just get one of your fellow employees to do it for you, particularly a younger gentlemen....chances are....he's smarter than you.
    That could be considered a personal attack here. Please mind how you post on HTalk.

    thx

  9. #9
    Join Date
    Jan 2010
    Posts
    6,298
    Looks like a lot of work to me. Is it cost affective ?

  10. #10
    Join Date
    Mar 2011
    Location
    Pennsylvania
    Posts
    7
    Quote Originally Posted by VTP99 View Post
    Looks like a lot of work to me. Is it cost affective ?
    Whether you get one factory built, or make your own, either way it is time consuming and a piece of tedious work.

  11. #11
    Join Date
    Apr 2005
    Location
    Atl. GA.
    Posts
    14

    Trane TXV

    Thanks Guys, Your help is very much appreciated! I emailed Trane but have not received a response.

  12. #12
    Join Date
    Jan 2008
    Location
    Dallas ,Texas
    Posts
    3,718
    Quote Originally Posted by dstrong View Post
    Thanks Guys, Your help is very much appreciated! I emailed Trane but have not received a response.
    Try your American Standard Distributor the use the same part numbers I believe.
    UA 100

    It takes three people to do anything around here. Two do the work, one explains to the crowd of people who showed up when they seen smoke and flames.

  13. #13
    Join Date
    Jan 2003
    Location
    Kansas City
    Posts
    1,482

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