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  1. #1
    Join Date
    Jun 2007
    Location
    Jersey
    Posts
    197

    Would you approve of this?

    I found this yesterday during a tune up at a retirement village. The is a condo building all the condensors are in an underground parking garage. Outside was 75* in garage 89*. R-22 pressures 64/242# superheat 34* subcool 30*. wetbulb 61* and 22* temp drop across coil.TXV unit and a/c only. Lineset was unknown length. Customer had no complaints other than she knows the unit runs a lot. But keeps up most of the time. Garage did have larger exhaust fans. All the condensors had build up on coils. of course no water lines nearby besides fire sprinklers.

    What would you guys recommend?
    Only other thing I could think of was a head pressure control to activate the fire sprinklers. But I only told her to continue lawsuit against builders.
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    Any fool can know. The point is to understand. Albert Einstein

  2. #2
    Join Date
    Mar 2004
    Location
    SE Michigan
    Posts
    17,911
    Why not?...those are gibson units.
    " Kill a Commie for Mommy! "

    - Colonel David Hackworth (1930-2005), Korean War Vet

  3. #3
    Join Date
    Sep 2007
    Location
    Boise, ID
    Posts
    4,261
    Hey..leave me outa this.
    If a nation expects to be ignorant and free, in a state of civilization, it expects what will never be. (Thomas Jefferson 1816)

  4. #4
    Join Date
    Dec 2002
    Location
    SouthEast NC ICW & Piedmont Foothills
    Posts
    7,635
    you need to clean those coils first.


    see stuff like that and worse on the coast
    It`s better to be silent and thought the fool; than speak and remove all doubt.

  5. #5
    Join Date
    Oct 2011
    Location
    Arkansas
    Posts
    835
    The big thing around here is folks want to build a lean-to roof over their condensing units. I don't know who talks them into it. Run into a lot of them. Damned roof 3" above the cond. unit, and they wonder why it doesn't work on a hot day.

    Also we have a local Ruud dealer who likes to install them under decks. Wish I would have took some pics of the last one I worked on.

  6. #6
    Join Date
    May 2004
    Location
    Austin, TX
    Posts
    1,733
    After cleaning coils, you may want to think of installing a higher rpm motor
    to increase the airflow across coil.

    I have done this on several occasions where cu's were installed in garages,
    lived in high heat surroundings.

    It has worked well for me on the ones I have increased the rpm. Only
    increase the rpm one step though.

  7. #7
    Join Date
    Nov 2001
    Location
    Seattle, WA
    Posts
    7,758
    That's kind of stardard for the industry around here cept most of them are now mounted near the ceiling and over a parking space.

    I had one home where the condensor location caused the air to be over 115 degrees when it was about 60 OA.
    "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

  8. #8
    Join Date
    Aug 2009
    Location
    Jurupa Valley, CA
    Posts
    1,777
    Well, the hot air 'could' be ducted outside... bit of work to do through, and there SHOULD be backdraft dampers on each one... but it is a possible solution...

  9. #9
    Join Date
    May 2000
    Location
    Urbandale IA. USA
    Posts
    4,924
    Water source condensers.
    Just a thought....
    ,
    Those who dance, appear insane to those who do not hear the music.
    Those who believe, appear ignorant to those who do not know God.

  10. #10
    Join Date
    Dec 2007
    Location
    Afton, VA / Khorat, Thailand
    Posts
    2,468
    I would think they could've found a better place to set them. If they looked.......
    Tough times don't last...Tough people do.

    Midnight Sun Astrophotography

  11. #11
    Join Date
    Jan 2006
    Location
    McQueeney, Texas
    Posts
    3,822
    "R-22 pressures 64/242# superheat 34* subcool 30*".

    Did you have those readings on all of the systems?

  12. #12
    Join Date
    Jun 2007
    Location
    Jersey
    Posts
    197
    Quote Originally Posted by walterc View Post
    "R-22 pressures 64/242# superheat 34* subcool 30*".

    Did you have those readings on all of the systems?
    No, just on the 1 unit I was working on.
    Any fool can know. The point is to understand. Albert Einstein

  13. #13
    Join Date
    Jan 2006
    Location
    McQueeney, Texas
    Posts
    3,822
    Quote Originally Posted by cuervo View Post
    No, just on the 1 unit I was working on.
    89* isn't that hot. High SC and High SH..
    You might check the other systems and compare.
    It acts like a restriction or bad TXV or even a heavy indoor coil load.

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