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Thread: Can I use TXV??

  1. #1
    Join Date
    Jun 2005
    Posts
    77
    2 ton 10 seer Ruud condensor mated to Apollo hydroheat SA3024 airhandler in attic. Air handler came with .059 orifice which installer installed right before he brazed lineset to air handler.

    Can a TXV be installed on a system like this?? Any benefit?

  2. #2
    Join Date
    May 2005
    Location
    Calgary, Alberta, Canada
    Posts
    92
    Mike,

    That orifice could be the wrong size for your condensing unit. Cond. unit will come with correct orifice which is to be installed into airhandler. As far as the TXV is concerned I can't honestly say as I have never installed one on that small a tonnage. I know there are 3 ton valves for sure though, that doesn't help you though.

    The TXV is a far more stable metering device but I have never seen it used on a system this size, probably because of initial cost.(I don't do much installing mike, I only get to fix the mistakes!!LOL)


    -websy



    [Edited by websy on 06-07-2005 at 09:12 PM]
    Yes we have air conditioning in our igloos.

  3. #3
    Join Date
    Apr 2005
    Location
    NE PA
    Posts
    698
    York makes a 2 ton TXV coil. Also there are several 1.5-2 ton TXV valves available if you want to retro one in.

    paul

  4. #4
    Join Date
    Jun 2005
    Posts
    77
    My RUUD UAKB 024JAZ condenser did not come with an orifice?? The installer looked and there was none.

    The .059 orifice came with the Apollo SA3024 air handler.

    Can any of the pros tell me if I have a orifice problem??


  5. #5
    Join Date
    Apr 2003
    Location
    Northern Virginia, Fairfax County
    Posts
    641
    I hope a pro here will specify a TXV that will work. I think there is hope.

    My Trane XL19i, a nominal 3 ton condensing unit, has two compressors. The small compressor is 1.2 ton and the large compressor is 2.8. The Trane coil has a TXV built in. So the TXV deals with both capacities.

    As a homeowner, I believe the TXV allows better metering of the compressed refrigerant through the coil, boosting efficiency and possibly dehumidification. Experts??

    Al (in Northern Virginia)

  6. #6
    Join Date
    Apr 2005
    Location
    NE PA
    Posts
    698
    I just did a quick look and Grainger has a 1.5-2.5 ton TXV (p/n 6MD04) for $ 58.00.

    That's one

    paul

  7. #7
    Join Date
    Jun 2005
    Posts
    77
    TXV valves arent unit/Brand specific?? A 2 ton txv valve can be used in any 2 ton system??

  8. #8
    Join Date
    Apr 2005
    Location
    NE PA
    Posts
    698
    There are a few things to watch: line size matches and the valve is rated for the type of refrigerant that is in the system. If it is a heat pump, then a TXV with a built-in check valve function should be used, or an external check needs to be tubed in as well.

    Generally speaking there is nothing unique to a given brand. Also avoid oversizing the TXV valve, otherwise hunting in the valve can occur.

    paul

  9. #9
    Join Date
    Aug 2003
    Location
    Fort Worth, TX
    Posts
    11,376
    Why wouldn't a TXV, properly sized and tuned, not work?

    Two ton TXV's for R22 high temp systems? Sure, such a thing exists. Sporlan makes one in the "S" series. An adjustable valve with inlet screen, externally equalized. Nice valve. Go with the VGA thermostatic bulb charge.
    • Electricity makes refrigeration happen.
    • Refrigeration makes the HVAC psychrometric process happen.
    • HVAC pyschrometrics is what makes indoor human comfort happen...IF the ducts AND the building envelope cooperate.


    A building is NOT beautiful unless it is also comfortable.

  10. #10
    Join Date
    Jun 2005
    Posts
    77
    My RUUD UAKB 024JAZ condenser did not come with an orifice?? The installer looked, I looked and there was none.

    The .059 orifice came with the Apollo SA3024 air handler.

    Can any of the pros tell me if I have a orifice problem??

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