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  1. #1

    Need some help:(

    We have Trane RTHD in our plant which is installed 2 months ago.We are having oil loss at compressor problem.We are using directly river water in condenser and we have a variable cooling need conditions.The river water temperature is 11-13 C in this winter.Altough head pressure,oil pressure,refrigerant luquid level is OK we sometimes face oil loss problem.

    Evap entering water 1.2C
    Evap leaving temp -2.8C
    Condenser entering water 12C
    Condenser leaving water 13C

    Evap refrigerant pressure 136
    Condenser ref. pressure 400

    Evap app. temp : 3-4 C
    Condenser app. temp: 1-2C
    Load: %42

    Chiller works in above conditions about 75-80 minutes.Then as we dont have cooling need so much it goes to;
    Evap entering water -1.7C
    Evap leaving temp -3C
    Condenser entering water 12C
    Condenser leaving water 12.5C

    Evap refrigerant pressure 128
    Condenser ref. pressure 360

    Evap app. temp : 2 C
    Condenser app. temp: 0.8C
    Load: %26

    But after working 6-7 hours while in above conditions the chiller goes to "oil loss"
    İs this because of cold condenser water?If I can warm it up to 20 C then is everthing going to be OK?

    Many thanks for asnwers

  2. #2
    Join Date
    Mar 2012
    Location
    montreal/canada
    Posts
    81
    This runs on what refrigerant and when u say it runs at 400 is that psi,and yes condenser water is to cold

  3. #3
    Join Date
    Mar 2012
    Location
    montreal/canada
    Posts
    81
    You must have the design sheet of the chiller ,that will tell you what should be the entering and leaving temp for the evap and cond and the gpm

  4. #4
    Join Date
    Oct 2011
    Location
    La.
    Posts
    280
    WARRANTY!!!!!!!! Call Trane.

  5. #5
    Join Date
    Mar 2004
    Location
    ottawa canada
    Posts
    2,045
    No condenser water temp control , no water treatment ..........Kiss the Warranty goodbye ...its in great big print in the IOM and on labels on the chiller .
    The 64 roars to life Whoo hoo ...shes a rolling chassis .
    You bend em" I"ll mend em" !!!!!!!
    I"m not a service tech.. I"m a thermodynamic transfer analyst & strategic system sustainability specialist
    Best Austin Healey In Show twice in 2013 .....All those hrs paid off .

  6. #6
    We have a condenser regulating valve in the outlet of condenser and works when the head pressure is under limits(1,7 bar).The data sheet says;

    Evap. entering temp 2 C
    Evap leaving temp -3 C

    Condenser ent. temp 25 C
    Condenser leaving temp 30 C

    But it also says you can use cold water minimum 12.5C and as far as I know cold water means lower power suction.

  7. #7
    Join Date
    Mar 2004
    Location
    ottawa canada
    Posts
    2,045
    Read the rules at the top of the page .....NO DIY ......... CALL A PRO
    The 64 roars to life Whoo hoo ...shes a rolling chassis .
    You bend em" I"ll mend em" !!!!!!!
    I"m not a service tech.. I"m a thermodynamic transfer analyst & strategic system sustainability specialist
    Best Austin Healey In Show twice in 2013 .....All those hrs paid off .

  8. #8
    Join Date
    Mar 2007
    Posts
    3,108
    Quote Originally Posted by Healey Nut View Post
    Read the rules at the top of the page .....NO DIY ......... CALL A PRO
    Who said anything about DIY? If the machine is only two months old, I agree that the owner should have Trane come out and look at the thing.
    "There is no greater inequality than the equal treatment of unequals."

    -Thomas Jefferson

  9. #9
    Join Date
    Jul 2007
    Location
    The Hot South
    Posts
    1,313
    Why don't you convert all the temps to F and pressures to PSI for the metrically challenged.

  10. #10
    Join Date
    Jan 2008
    Location
    Dallas ,Texas
    Posts
    3,707
    Quote Originally Posted by R123 View Post
    Why don't you convert all the temps to F and pressures to PSI for the metrically challenged.
    Just google for a kpa to psi converter .
    UA 100

    It takes three people to do anything around here. Two do the work, one explains to the crowd of people who showed up when they seen smoke and flames.

  11. #11
    Dear Healey Nut, I dont say our filtretion is the best,my first problem is to learn whether I should warm the condenser water or not and to learn if the main reason of oill los is another thing.If you think the problem is filtration then OK.

    I thought the regulating valve is OK when the head pressure is lower than limits.Do you think that it should reduce the water flow continiusly?

  12. #12
    Join Date
    Mar 2012
    Location
    montreal/canada
    Posts
    81
    Okan convert pressures and temps to psi and degree F like R123 said ,and explain more ur operation of the valve at the outlet of ur condenser and I still say water in at the condenser is to cold bring that up to 25 c

  13. #13
    Join Date
    Oct 2011
    Location
    La.
    Posts
    280
    This is the problem with us in America. The entire word uses metric units, we even signed an agreement to start converting to it. However, we are cowboys and refuse to learn new ways. So to the rest of the world, if you want an Americans help, convert to imperial units please. We are to lazy to learn it!
    Thank You, for understanding our limitations.

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