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  1. #1
    Join Date
    May 2011
    Location
    NEPA
    Posts
    12

    R-22 replacements

    I was wondering what how well the R-22 replacement refrigerants work. I have a walk in cooler at my cabin which developed a leak at a flare over the summer and rather than shelling out the dough for a cyl. of the real stuff I thought I'd try the replacement. (at about half the cost) Also wondering how the operating pressures compare. Thanks.

  2. #2
    Join Date
    Aug 2012
    Location
    Gainesville, FL
    Posts
    325
    Lots of threads on here about Isceon, MO99, Nu22, 422b, 407c, 414b, 438a, etc. ad infinitum

  3. #3
    Join Date
    May 2011
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    NEPA
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    12
    Quote Originally Posted by Pete838 View Post
    Lots of threads on here about Isceon, MO99, Nu22, 422b, 407c, 414b, 438a, etc. ad infinitum
    Which of these are direct drop in replacements?

  4. #4
    Join Date
    Aug 2012
    Location
    Gainesville, FL
    Posts
    325
    MO99/438a is the closest as far as properties/pressures, but there is no "drop-in" you can top off 22 with a secondary gas. It will only save you 20 or 25 percent, though. DuPont has a video on YouTube with more info.

  5. #5
    Join Date
    Dec 2000
    Location
    Flat Rock, NC
    Posts
    463
    I give a vote for 407c. Two installs w/ 3 units and one conversion w/ no callbacks yet.

  6. #6
    Join Date
    Jan 2011
    Location
    Ward, Arkansas, United States
    Posts
    842
    http://coolantexpress.com/


    Just heard about this website today. Sounds like a bunch of b.s.
    "Gentlemen. You can't fight in here. This is the War Room!"-Dr. Strangelove (1964)

  7. #7
    Join Date
    Aug 2012
    Posts
    2,677
    R-22 replacement= r-410a

  8. #8
    Join Date
    Feb 2007
    Location
    Georgia
    Posts
    162
    Not for refrigeration med temp

  9. #9
    Join Date
    Feb 2006
    Location
    Phoenix,AZ
    Posts
    2,893
    Quote Originally Posted by Hunter844 View Post
    http://coolantexpress.com/


    Just heard about this website today. Sounds like a bunch of b.s.
    Yeah, they only give you 12lbs!!!

    Because Coolant Express 22a Refrigerant is so efficient you will use up to 40% less! Please see equivalencies below.

    The 30 lb cylinder = 12 lbs of Coolant Express Refrigerant and is EQUIVALENT to 30 lbs of R22a

    The 50 lb cylinder = 20 lbs of Coolant Express Refrigerant and is EQUIVALENT to 50 lbs of R22a
    Each ounce of Coolant Express 22a Refrigerant is equivalent to 2.5 ounces of R22.

  10. #10
    Join Date
    Nov 2006
    Location
    Southeastern Pa
    Posts
    18,820
    Quote Originally Posted by KB Cool View Post
    Yeah, they only give you 12lbs!!!

    Because Coolant Express 22a Refrigerant is so efficient you will use up to 40% less! Please see equivalencies below.

    The 30 lb cylinder = 12 lbs of Coolant Express Refrigerant and is EQUIVALENT to 30 lbs of R22a

    The 50 lb cylinder = 20 lbs of Coolant Express Refrigerant and is EQUIVALENT to 50 lbs of R22a
    Each ounce of Coolant Express 22a Refrigerant is equivalent to 2.5 ounces of R22.
    MANY years ago, in the 1990's, I was doing 134a conversions on R12 systems in cars. The guideline was that you could only charge 80% of the weight of the R12 system label value once you had replaced the receiver or accumulator (depending on the system) and drained out whatever oil you could.

    That's probably the reason they say you need less.
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

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  11. #11
    Join Date
    Feb 2007
    Location
    Georgia
    Posts
    162
    One of the main things that affects that(how many pounds you need) is the refrigerant density.

    Goto a thermophysical properties chart for r717 and r22 and compare lb per cubic foot. R22 is over twice as dense.

    R22a should publish same info as well as what the components are.

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