Results 1 to 9 of 9
  1. #1

    Trane screw chiller

    Alarm indicates a low refrigerant liquid level in circuit #2, however my subcooling is 20F. The rest of my readings show:
    EXV 100% OPEN
    Liquid level (-1.7)
    Evaporator pressure 27.8
    Evaporator approach 11.8
    Condenser pressure 125
    Condenser approach 16
    Discharge superheat 42.5
    Sight Glass (NO bubbles)
    Liquid line filter drier (No temperature differental)
    Leaving chill water: 44F
    Entering chill water: 60F

    Any idea what it could be? I suspect it is a refrigerant restriction somewhere mabye in the EXV, but I was able to see the stem of the EXV move in and out. Could the EXV still have a restriction but be mechanicaly ok?

  2. #2
    Join Date
    Jul 2007
    Location
    The Hot South
    Posts
    1,368
    It would help if you posted the model and serial number....

    Is this the RTWD100 chiller Serial # U08L02012 in Hawaii?

    Also, where are you taking your temperature and pressure readings to determine subcooling?

  3. #3
    Join Date
    Jan 2009
    Location
    Not in Iran
    Posts
    1,111
    Ur exv should not be 100% open -/ remember that ur chiller wants to stay running no matter what ,. Low liquid level- ur -1.7 is not correct at all,. Should maintain 0.0
    In condenser and evap,.I would be looking for oil residue /- also u might want to think about weighting the charge. And ur approach is way out of wack- u have a few things going on here,. Could very well be dirty tubes

  4. #4
    Join Date
    Aug 2006
    Location
    Mixing oil and fire with a big spoon.
    Posts
    4,524
    this sounds a touch familiar! this thread is in the pro chillers sections where this tech can't look...competing companies on the same job?
    "If you pull one more stunt like you just pulled with Tommy, you won't have to get on a plane because I will personally kick your ass from here to Korea!" - Best of the Best

  5. #5
    Join Date
    Jan 2009
    Location
    Not in Iran
    Posts
    1,111
    Really.,/- well hope they get it squared away
    Might see theses guys in the octagon going toe to toe.,

    Can I have ring side seats

  6. #6
    Join Date
    Aug 2006
    Location
    Mixing oil and fire with a big spoon.
    Posts
    4,524
    Quote Originally Posted by milkyway View Post
    ...Can I have ring side seats
    i will sit next to you! you get the popcorn i'll get the beers!
    "If you pull one more stunt like you just pulled with Tommy, you won't have to get on a plane because I will personally kick your ass from here to Korea!" - Best of the Best

  7. #7
    Join Date
    Sep 2008
    Location
    A land down under
    Posts
    314
    Quote Originally Posted by milkyway View Post
    Really.,/- well hope they get it squared away
    Might see theses guys in the octagon going toe to toe.,

    Can I have ring side seats
    Well worth the price of ringside seats if the Canadian Crusher joins the stoush!
    Necessity is the mother of invention

  8. #8
    I was able to override both circuit EXV's to open 100% and compared the two. The one that im working on only open up 50% when looking through the sight glass while the other one looks like a 100% open. Tried banging it with a wrench to see if it was stuck but that did not work. Gonna change out the EXV motor. You guys are funny!

  9. #9
    Increased1


    I was able to override both circuit EXV's to open 100% and compared the two. The one that im working on only open up 50% when looking through the sight glass while the other one looks like a 100% open. Tried banging it with a wrench to see if it was stuck but that did not work. Gonna change out the EXV motor. You guys are funny!

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Comfortech Show Promo Image

Related Forums

Plumbing Talks | Contractor Magazine
Forums | Electrical Construction & Maintenance (EC&M) Magazine
Comfortech365 Virtual Event