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  1. #27
    Join Date
    Jun 2004
    Posts
    847
    My bad
    I don't see it either.

    Regardless sight glass should not be used to charge this unit.
    Pressures and temperatures
    Is all u need.

  2. #28
    Join Date
    Apr 2012
    Location
    Louisiana
    Posts
    626
    Quote Originally Posted by shaka View Post
    My bad
    I don't see it either.

    Regardless sight glass should not be used to charge this unit.
    Pressures and temperatures
    Is all u need.
    x2

    OP is awol

  3. #29
    Join Date
    Jul 2007
    Location
    Mount Airy, MD
    Posts
    7,278
    millertime77,

    Please do not create duplicate threads on this site to discuss the same problem. I have merged the 2 that you created together.

  4. #30
    Join Date
    Feb 2007
    Location
    Sulphur La.
    Posts
    179
    I would have to check the piston as it looks like it is stuck in the fitting and bypassing refrigerant. Sometimes I have been able to seat them by rapping on the FCCV with the handle of a wrench.
    On stubborn ones you have to pump down and open the fitting.
    Being a pump the piston does move in and out of the seat and can gat stuck partially open.

  5. #31
    Join Date
    Aug 2012
    Posts
    7
    Forget about the sight glass and use your charging chart.

  6. #32
    Agreed, forget the SG.

    Get a charging chart.

    I have a nifty app on my smartphone that says with those conditions ( 70 Outdoor Ambient, 60 Indoor Wet Bulb ) You should be around 23.5 Subcooling (if TXV) or 15.7 Superheat (If using a fixed orifice)

    Hope that helps

  7. #33
    Join Date
    Dec 2002
    Location
    Arizona
    Posts
    4,246
    I'm in for the SH number, Not so sure about that SC number!
    Make your expertise uniquely valuable.

    Make your influence uniquely far-reaching.

  8. #34
    Join Date
    Dec 2010
    Location
    Virginia
    Posts
    353
    Quote Originally Posted by jimj View Post
    At 70* IDDB and 70* ODDB you should have 10* of SH. With a matched indoor unit it calls for an #83 piston. The unit calls for 8lbs 6oz for a 15' line set ( and you added 7lbs?). You started with 200/75 and then added 7lbs ( ouch)?

    At 70* ODDB you should be around 65/190. See the Trane Fast Fact attachment.Attachment 305681


    Your OVER CHARGED.
    No thats what I ended up with. Call was unit not cooling , low suction and high superheat, so it needed refrigerant(R-22) The outdoor ambient was like 95 that day the rh,wb,db readings are from inside the conditioned space. Thats my point is this thing is working great, now, but still has bubbles in the glass, and boss kept telling me to keep adding but I didnt want to so I finally talked him into letting me leave it. As far as non-condensables being in the system, the paper is green.

  9. #35
    Join Date
    Dec 2010
    Location
    Virginia
    Posts
    353
    Quote Originally Posted by Chris_Worthington View Post
    millertime77,

    Please do not create duplicate threads on this site to discuss the same problem. I have merged the 2 that you created together.
    The reason I did that is because when I first posted it didnt go through correctly and gave me some sort of passage saying to email the site administrator if this passage is shown. My thread came up on the main screen but when I clicked on it, that was what I got. So I tried again, that is why there are 2.

  10. #36
    Join Date
    Feb 2009
    Location
    Tallahassee, FL
    Posts
    5,821
    What do you mean paper is green.

  11. #37
    Join Date
    Sep 2008
    Location
    Western PA
    Posts
    24,970
    Quote Originally Posted by millertime77 View Post
    As far as non-condensables being in the system, the paper is green.
    The 'paper' in the sightglass is for moisture and only moisture.

    It will tell you nothing about non condensibles in the system.

  12. #38
    Join Date
    Mar 2009
    Location
    Mid-Mo
    Posts
    3,427
    Quote Originally Posted by jpsmith1cm View Post
    The 'paper' in the sightglass is for moisture and only moisture.

    It will tell you nothing about non condensibles in the system.
    ^
    X2

  13. #39
    ^
    X3

    FWIW, I had a similar job a month ago. SC was where it was supposed to be but the SG was not clear... I was told a TXV needed a full column of liquid to work properly so I kept adding juice. I couldn't clear the SG to save my life... After way overshhoting the SC and still seeing bubbles, I decided to forget about the SG and just focus on the SC.

    Hope that helps...

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