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  1. #1
    Join Date
    Dec 2010

    york split question,subcool response

    2ton 15 yr old york split HP; txv; accumulator
    cooling look good but i decided to check my unit white the september heat was hot.

    Out amb 95, humidity 40
    press; 77, 225
    saturation temp 105 (looking for 95 at least) (10 above amb though)

    inside; TEET per feildpc good- 80 in 60 out

    SubCool abt 0
    I added 16 oz over 45 min time period and got very little reaction to subcool.
    Both pressures came up a little each time i added but settled back to the org pressures and sat temp.
    Dont have much exp with York but looks like the average system txv.

    The question; is the system low based on temp and pressures.
    coils are clean.

  2. #2
    Join Date
    Dec 2010
    should have said liquid line temp and saturation temp abt the same. 105

  3. #3
    Join Date
    Apr 2011
    what are your sub cool and super heat numbers
    Aire Force A/C and heating
    since 1988

  4. #4
    Join Date
    Dec 2009
    Fort Worth, Texas
    to be honest, the only numbers that are needed for troubleshooting are sh and sc. these are the two numbers needed. if you have 0 subcooling it means you are low on charge but we need sh to verify and it may lead us to need other info.

  5. #5
    Join Date
    Sep 2011
    I assume you read the 105 F, and the Sat temp at 225 is 109.5 not 105 so you have subcooling of 4.5. The DT at the evap is 20 F very good. The 77 P at your evap seems a hair low with those numbers but could be ok. I would have thought it would be closer to 85 P meaning a temp of 50. I bet your superheat was high and when you added the refrg it droped. Is the CFM lower than 800? Sounds like it might be. Check your superheat you may need a little more refrig.

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