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  1. #1
    Join Date
    Apr 2004
    Posts
    566
    was wondering how the economzer works on these machines the book isnt to clear, and are they trouble prone .thanks

  2. #2
    Join Date
    Feb 2003
    Location
    Wichita Ks
    Posts
    1,477
    the econimizer pulls flash gas off of the liquid to lower subcooling, that gas goes into the motor and then into the screw at a different point than the suction gas. that pressure will be higher than suction. the electronic expansion valve is inside the econimizer. also a float, there is a small line that feed gas pressure under the float so it can float. the float seperates the liquid line pressure to the econimizer pressure so the liquid is cooled for better subcooling. you may need to look at a cut away picture for this to make sence.

  3. #3
    Join Date
    Dec 2002
    Location
    Titusville Florida
    Posts
    337
    Sometimes the float is prone to stick, If i remember right you should only need 3 lbs of force to move the float. On air cooled models you will need to remove the freon to inspect the float due to your bubbler circuit. Their is no service valve on the bubbler circuit on the air cooled models, unless the newest version comes with a valve now.

  4. #4
    Join Date
    Feb 2003
    Location
    Wichita Ks
    Posts
    1,477
    i started up a couple of 300 tons last week and the new unit did not have this style of economizer. it used a plate heat exchanger and a expansion valve that is out where you can see it. it was on a 30gxr machine

  5. #5
    Join Date
    Dec 2002
    Location
    Titusville Florida
    Posts
    337
    That sure sounds like a better ideal, Taking apart the econimizer was a real pain.

  6. #6
    Join Date
    Apr 2004
    Posts
    566
    thanks alot its clearer to me now

  7. #7
    The new 30GX models have re engineered the econimizer
    and have a plate heat exchanger.

  8. #8
    Join Date
    Aug 2000
    Location
    USA
    Posts
    4,990
    Same thing York does. Wonder who copied whose idea?
    Originally posted by carriertech1
    The new 30GX models have re engineered the econimizer
    and have a plate heat exchanger.

  9. #9

    khan

    hai friends i have one problem in trane chiller rtaa model there was showing alarm ( starter transition compresser a and b so chiller is not start so what is the problem pls tell me that what i do.

  10. #10
    Join Date
    Apr 2007
    Posts
    177
    Quote Originally Posted by fmohdkhan View Post
    hai friends i have one problem in trane chiller rtaa model there was showing alarm ( starter transition compresser a and b so chiller is not start so what is the problem pls tell me that what i do.
    Call a qualified contractor to repair your machine.

  11. #11
    Join Date
    Feb 2008
    Location
    Dubai
    Posts
    103

    Thumbs up

    Quote Originally Posted by fmohdkhan View Post
    hai friends i have one problem in trane chiller rtaa model there was showing alarm ( starter transition compresser a and b so chiller is not start so what is the problem pls tell me that what i do.
    HI KHAN CHECK THE OXILARY CONTACTS(NO,NC POINTS) IN COMPRESSOR CONTACTOR.IF THER IS ANY LOOSE CONNECTION CIRCUIT WILL GO TO STARTER TRANSITION ALARM.

    MOIDEEN-DUBAI

  12. #12

    khan

    thanks mohideen i try to do that as u told.

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