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  1. #1

    R22 Retrofit question

    We have 3 Carrier ICE units that are charged with R22. One is fully operational, but the other two are low on freon. We're currently planning to retrofit one of them, and use the recovered freon to recharge the other after the leaks have been repaired(schraeders in service ports need replacement, tool to do charged system swap has already been ordered).
    During the retrofit, the filters and all service port schraeders will be getting replaced due to being the simplest and safest time to replace them.
    After doing some research, I've come across DuPont's ISCEON MO99(R438A) as a possible direct replacement for the R22.
    The condensers are Carrier 38AH-044---600 and the evaporators are ICE AC-042.
    Would this be the best match for the retrofit? Also, would the charge charts(superheat) on the units line up the same?
    Thank you in advance.
    Last edited by Straick; 06-27-2012 at 05:00 PM. Reason: typographic error

  2. #2
    Join Date
    Apr 2012
    Location
    winnipeg
    Posts
    1,330
    whats wrong with 22
    it was working.... played with it.... now its broke.... whats the going hourly rate for HVAC repair

  3. #3
    Join Date
    Jul 2009
    Location
    Delaware, USA
    Posts
    44
    The link is the MO99(tm) (R438A) retrofite guide and has P/T charts as well as charging information, etc

    http://www2.dupont.com/ISCEON/en_US/...guidelines.pdf

  4. #4
    Carmon, the problem with the R22 is the escalating price, and we are looking at a long term, cost effective solution.

  5. #5
    Join Date
    Jan 2008
    Location
    Dallas ,Texas
    Posts
    3,720
    Ice units are these for comfort cooling?
    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.

  6. #6
    Join Date
    Apr 2012
    Location
    winnipeg
    Posts
    1,330
    Quote Originally Posted by Straick View Post
    Carmon, the problem with the R22 is the escalating price, and we are looking at a long term, cost effective solution.
    I here ya... a tight system will never require an yR-22 ...it does not go bad ....
    it was working.... played with it.... now its broke.... whats the going hourly rate for HVAC repair

  7. #7
    Join Date
    Nov 2006
    Location
    Southeastern Pa
    Posts
    18,582
    Quote Originally Posted by Straick View Post
    We have 3 Carrier ICE units that are charged with R22. One is fully operational, but the other two are low on freon. We're currently planning to retrofit one of them, and use the recovered freon to recharge the other after the leaks have been repaired(schraeders in service ports need replacement, tool to do charged system swap has already been ordered).
    During the retrofit, the filters and all service port schraeders will be getting replaced due to being the simplest and safest time to replace them.
    After doing some research, I've come across DuPont's ISCEON MO99(R438A) as a possible direct replacement for the R22.
    The condensers are Carrier 38AH-044---600 and the evaporators are ICE AC-042.
    Would this be the best match for the retrofit? Also, would the charge charts(superheat) on the units line up the same?
    Thank you in advance.
    So, you are planning on doing the work yourself?

    Do you have the proper EPA certification, and state license where required?

    ADVICE:

    I do commercial for a living, and I am not using ANY of the so-called "drop in" refrigerants. R 22 ONLY is used for our repairs.
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist

    AOP Forum Rules:







  8. #8
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    68,117
    JasonFannin, this is the Ask Our Pro's forum, and only Pro members that have been vetted by the AOPC may post advise here. Please apply to the AOPC today, thank you.

    You can find the rules for posting and qualifications here.


    Further infractions may result in loss of posting privileges.
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    How-to-apply-for-Professional

    How many times must one fix something before it is fixed?

  9. #9
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    68,117
    syndicated, this is the Ask Our Pro's forum, and only Pro members that have been vetted by the AOPC may post advise here. Please apply to the AOPC today, thank you.

    You can find the rules for posting and qualifications here.
    Contractor locator map

    How-to-apply-for-Professional

    How many times must one fix something before it is fixed?

  10. #10
    Timebuilder, the tool was ordered for our HVAC tech(something wrong with his). I don't have the certification for the work, and so I won't do it, but I am putting all the information together for them in regards to a retrofit(replacement freon and any modifications to the system needed). As of right now, he doesn't want to purchase any R-22 due to the price of it, so we are trying to find alternatives to replacement of the units.
    Carmon, I understand that a tight system should never need even a top off charge, and that's why our tech gets to repair all leaks during retrofit, and before top off of the other units with the recovered freon.
    DallasDuster, these ICE units are for comfort cooling.

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