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  1. #1
    Join Date
    Jan 2009
    Location
    South Texas
    Posts
    36

    Rheem Condenser with fluxuating pressures and temps.

    Just replaced an evap coil on an R-22 system. Had bad leak in an Aspen coil on a 5-6 year old system. It has an orifice on the coil. The day I installed it it was working well. Had a call out about a month later, upstairs not keeping up. Its a 2400sqft two story with 1-5 ton system. Suctions pressure was going up and down from about 60-75 ranging from 7-18 degree superheat. Couldn't read high side due to leaking high side hose on previous call. Checked indoor coil drop and was getting a fluxuating split of 14-18 degrees. Had a lot of temp loss in ducts from super hot attic. About 7 degrees. I plan to go back out there to get a couple more reading but was curious if anyone had some ideas what could be doing this.

    Thanks.

    Jr

  2. #2
    Join Date
    May 2000
    Location
    Indianapolis, IN, USA
    Posts
    33,389
    When you changed the coil, did you recover old refrigerant or pump down & keep it? We found we were getting moisture in the systems when they were leaky and stopped trying to save the remaining gas. Starting all new stopped the expensive callbacks.

  3. #3
    Join Date
    Sep 2003
    Posts
    1,617
    Non-Condsensibles?

  4. #4
    Join Date
    Jan 2009
    Location
    South Texas
    Posts
    36
    We pumped the system down and topped it off after vacuum. We were pretty careful with the system before we changed the coil so I figured the refrigerant was ok. I guess not careful enough.

  5. #5
    Join Date
    Dec 2003
    Location
    Citrus County, Florida
    Posts
    1,399
    When I have a leaker, I recover most of the gas and then use another recovery tank for the rest.This eliminates sucking in the atmosphere.
    Doug

  6. #6
    Join Date
    May 2000
    Location
    Indianapolis, IN, USA
    Posts
    33,389
    We would pump down the charge in the past but got stung too many times with situation like this. So from about 2 years ago on, recover all then all new gas .

  7. #7
    Join Date
    Jul 2009
    Location
    Columbia, MD
    Posts
    3,379
    hope you figure it out. but next time cant you use the low side or charging side hose and just screw it to the hi side?

  8. #8
    non-condensables..

    bucking compound gauge.. need to recover the refrigerant and put new in... after you pump it down... Might wanna add a filter dryer as well.


    Sorry bro...

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