Page 1 of 2 12 LastLast
Results 1 to 13 of 18
  1. #1
    Join Date
    Feb 2012
    Location
    utah
    Posts
    106

    possible conversion

    Ya got to love the enviro's. So I have a building with a big national chain that has two trane rtwa that are r-22 (11yrs old), so for the company to get the green leaf status the units will need to be changed to 134 or be replaced. the question is, can those units be converted or do I get to replace them with a newer version.

  2. #2
    Join Date
    Aug 2006
    Location
    Columbus Ohio
    Posts
    1,980
    You get to replace them.
    UA LU189

    10mm, because it's better than .45acp

  3. #3
    Join Date
    Jul 2007
    Location
    The Hot South
    Posts
    1,298
    They can't be converted to 134A.

  4. #4
    Join Date
    Aug 2009
    Location
    Prattville, Alabama
    Posts
    1,997
    Is it still Trane's policy to not convert any Trane R22 equipment?

  5. #5
    Join Date
    Jan 2009
    Location
    Keokuk, IA
    Posts
    5,520
    Wow, only 11 years old too. Sell those puppies on the used market. Might fetch enough to cover installation costs at least.

    Hey, what size are they? I assume pretty large. Any chance they are 100-200 Tons?

  6. #6
    Join Date
    Sep 2008
    Location
    A land down under
    Posts
    306
    Quote Originally Posted by R123 View Post
    They can't be converted to 134A.
    Nothing is impossible, usually it is a question of the cost.

    In this case it is more the conversion is not supported by the factory and the approx 30% capacity loss associated with the conversion. If you can locate literature for ERTWA in the European market which operated under accelerated HCFC plase out of the Montreal Protocol you will understand why I say this (B20 IM 004E).

    ERTHA also was available on HCFC22/HFC 134a out of Epinal/Charmes but only HCFC 22 out of Pueblo. There are specific procedures required for the conversion and efficiency/capacity losses which reduces chlorine emissions and direct GWP.

    Does indirect GWP come into considreation under the green leaf status?
    Necessity is the mother of invention

  7. #7
    Join Date
    Jan 2008
    Location
    Dallas ,Texas
    Posts
    3,702
    MO-99 aka R-438a. Maybe is that a flooded evaporator or DX?
    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.

  8. #8
    Join Date
    Sep 2008
    Location
    A land down under
    Posts
    306
    The RTWA evaporator is DX, next issue affecting refrigerant conversions as the RTWA microprocessor measures refrigerant temperatures and converts to saturated temperatures for functional control. So the new refrigerant properties need to be selected in the configuration.
    Necessity is the mother of invention

  9. #9
    Join Date
    Feb 2012
    Location
    utah
    Posts
    106
    the machines are 90 ton. and yes indirect GWP comes into consideration under the green leaf status. I will do some research on the web and see what I can find. If anybody has some specifics that would be great.

  10. #10
    Join Date
    Jan 2008
    Location
    Dallas ,Texas
    Posts
    3,702
    Quote Originally Posted by nique View Post
    the machines are 90 ton. and yes indirect GWP comes into consideration under the green leaf status. I will do some research on the web and see what I can find. If anybody has some specifics that would be great.
    Well I looked on the web and all of the R-22 replacements seem to have a larger GWP than R-22.
    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.

  11. #11
    Join Date
    Feb 2012
    Location
    utah
    Posts
    106
    ya thats about what i found, thanks for looking.

  12. #12
    Join Date
    Mar 2012
    Location
    montreal/canada
    Posts
    81
    What voltage are the rtwa and are they in good shape and last question are they for sale

  13. #13
    Join Date
    Jun 2006
    Location
    New Jersey
    Posts
    4,330
    What's wrong with 407c?

Page 1 of 2 12 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Comfortech Show Promo Image

Related Forums

Plumbing Talks | Contractor Magazine
Forums | Electrical Construction & Maintenance (EC&M) Magazine
Comfortech365 Virtual Event