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  1. #40
    Join Date
    Mar 2013
    Location
    Port St. Lucie, Fl
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    5,662
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    Leading

  2. #41
    Join Date
    Jan 2010
    Location
    Sea to Sky
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    2,185
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    Napping

  3. Likes shellkamp liked this post
  4. #42
    Join Date
    May 2014
    Location
    Bay Area California
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    16,716
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    Waiting
    If you were a real tech, you'd solder a relay on that board and call it good to go.

  5. #43
    Join Date
    Nov 2008
    Location
    Altamont, IL
    Posts
    550
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    My first jug of MO 99 sat around a long time it's box said "Dupont Isceon MO 99. Now its Dupont Freon MO99 ??????????????????
    In GOD We Trust

  6. #44
    Join Date
    May 2014
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    Bay Area California
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    Quote Originally Posted by jdwendling View Post
    My first jug of MO 99 sat around a long time it's box said "Dupont Isceon MO 99. Now its Dupont Freon MO99 ??????????????????
    Probably shouldn't use it.

    /s
    If you were a real tech, you'd solder a relay on that board and call it good to go.

  7. #45
    Join Date
    Oct 2014
    Posts
    54
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    Quote Originally Posted by VTP99 View Post
    Correct me if I'm wrong but doesn't DuPont (Chemours) hold the patient on R1234yf and has entered into a anti-competitive arrangement with Honeywell ?
    Correct me again but wasn't it after there original refrigerant patients ran out that all these new blends arrived ?
    Seems to be making a complete circle once again.
    Here's an old thread http://hvac-talk.com/vbb/showthread....uth&styleid=41
    I remember this guy's web site; it's gone, now.
    For the record, I don't agree with him but there might be a kernel of truth to what he says, too.

  8. #46
    Join Date
    Dec 2009
    Location
    maroon lazyboy
    Posts
    1,938
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    Just helped convert an older R22 rack to 448a. Same tev powerheads.

  9. #47
    Join Date
    Jul 2000
    Location
    Guayaquil, EC
    Posts
    13,157
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    Quote Originally Posted by jdwendling View Post
    My first jug of MO 99 sat around a long time it's box said "Dupont Isceon MO 99. Now its Dupont Freon MO99 ??????????????????
    Quote Originally Posted by BBeerme View Post
    Probably shouldn't use it.

    /s
    DuPont changed its name to Chemours back in 2015. Then they brought back the old Freon brand name and applied it to all of their refrigerants that were formerly Suva and Iceon.

    https://www.chemours.com/Refrigerant...nformation.pdf

  10. #48
    Join Date
    Mar 2007
    Location
    In the Conservatory with a Lead Pipe
    Posts
    14,394
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    Hey Sporlan you still there?
    Can you do some compairison testing using dew point to set up superheat vs using the average temp between bubble and dew?

  11. #49
    Join Date
    Oct 2012
    Location
    Where we mow our own grass
    Posts
    6,501
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    Quote Originally Posted by itsiceman View Post
    Hey Sporlan you still there?
    Can you do some compairison testing using dew point to set up superheat vs using the average temp between bubble and dew?
    I’ve had better luck using the average.

    We have two major chains we do work for that specifically want superheat set using the average between bubble and dew.

  12. #50
    Join Date
    Mar 2007
    Location
    In the Conservatory with a Lead Pipe
    Posts
    14,394
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    Yeah but they get all day to mess with it and make some cool charts for us

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