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  1. #1

    Confused CVHG 600 Ton-Earthwise Centravac chiller low differential oil pressure problem!

    Hi,
    Recently we had overhauled an TRANE Earthwise- Centravac 600 ton-Model CVHG which was failed due to water entry.While commissioning the chiller we are facing a problem of low differential oil pressure.Before starting the compressor, the pressure reads to 14 to 15 psid and when the compressor the starts it drops to 10 psid(chiller trip set at 9 psid).This below the TRANE recommended limit of 18 psid.Prior to chiller failure we don't have any kind of problem oil system.We are unable to commission the chiller due to this.

    Please help me to sort out the problem.

  2. #2
    Join Date
    Mar 2004
    Location
    ottawa canada
    Posts
    2,065
    How about you try adjusting the oil pressure regulator
    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 .

  3. #3
    Join Date
    Mar 2004
    Location
    ottawa canada
    Posts
    2,065
    This really should be a pro forum
    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 .

  4. #4
    Join Date
    Aug 2009
    Location
    Prattville, Alabama
    Posts
    2,070
    You had a contractor, or service provider, overhaul your chiller? If so, call them back out. You should get somebody very familar with this style chiller involved.

  5. #5
    Mr.Healey! we have tried adjusting the oil pressure regulator, but didn't solve the problem.We also replaced the diaphragm also.

  6. #6
    Yes sir, we did the overhaul with our contractor only .But they are also struggling to get a suitable solution.The oil viscosity was tested and it was very low around 150 SSU instead of a standard 300 SSU(oil samples taken 1 week after chiller running).This is the second time we are planning to change the oil after the overhaul.

  7. #7
    Join Date
    Oct 2010
    Posts
    28
    can i ask you what type of style oil regulator this chiller has .

  8. #8
    Join Date
    May 2006
    Location
    N.E. IA
    Posts
    512
    You ARE using Trane OIL-22, aren't you?

    Try this:CTV-SVB62A-EN_Low Oil Press. Due to Debris -1-23-12.pdf
    "Wheel" mechanics work on "Wheel" chillers

  9. #9
    It may clogged oil filter due to overhaul. Recheck oil regulator and change oil filter
    See this is would help = Low diff oil pressure case 2663. If you need any support on Trane chiller let mail to meLow diff oil pressure case 2663.pdf

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