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  1. #14
    Join Date
    Dec 2002
    Quote Originally Posted by BaldLoonie View Post
    Then there's Carene-7!
    Carene-7 is R500.
    Make your expertise uniquely valuable.

    Make your influence uniquely far-reaching.

  2. #15
    Join Date
    Dec 2002
    in a house, Appomattox, Va.
    I've seen r-12 in refrigerators and car a/cs. A few 500 units, but no res a/c units. must have been some old stuff.
    Col 3:23

    questions asked, answers received, ignorance abated

  3. #16
    Join Date
    Jul 2009
    South Carolina
    I used to service a 5 ton R12 AC unit in a store for a few years & the new manager decided to call someone else to service it one summer. Later on in the week the manager's boss told him to call me when the AC guys couldn't get the thing running. I got there & all the pressure switches had been bypassed & the compressor was overheated. They kept adding R22 to get the pressures up & never read the plate on the unit that stated R12 refrigerant. In those days it was legal to vent R12 & R22 so it was a pretty easy fix.
    An engineer designs what he would never work on.
    A technician works on what he would never design.

  4. #17
    Join Date
    Nov 2001
    Seattle, WA
    In Vienna, Virginia in 1971 there was a home owner that took a walk-in box refrigeration system out and installed the evaporator in line with his duct work. That was an R12 system.

    It didn't work and we were installing a "new central air system" for his home using the existing furnace, of course.

    He never would tell us were he got the refrigeration unit. I consider his invention more a mistake than an A/C system though. Wish we had of taken pictures.
    "The American Republic will endure until the day Congress discovers it can bribe the public with the public's own money.
    - Alexis de Toqueville, 1835

  5. #18
    Join Date
    Sep 2002
    Sure; there were lots of R-12 systems - both residential and commercial. Then Carrier made a blend of R-12 & R-22 (I think) and called it R-500. That was less common than R-12 systems.

    R-22 was also used in car air conditioning. Chrysler used it.


    Quote Originally Posted by Pink Jazz View Post
    I have been reading some conflicting information concerning the use of R12 in residential HVAC systems. Some sites say that R12 was used in residential HVAC systems prior to the introduction of R22, while others state that R12 was used exclusively for automotive HVAC systems. Which is it?
    The conventional view serves to protect us from the painful job of thinking.

  6. #19
    Join Date
    Aug 2012
    North Dakota
    I believe freon was a brand name like kleenex or what-not

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