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Thread: trane rtac155

  1. #1
    Join Date
    Jul 2010
    Posts
    6

    Frown trane rtac155

    trane rtac155 chiller system #2 comp has heavy noise on discharge line & oil seperator,load & loads normal ,compare to other system 10'f oil temp high,
    can any one help me to eleminate this abnormal noise.reading is (mentioned below)taken at ambient of 113'f
    Active Chilled Water Setpoint 45.6_F
    Active Current Limit Setpoint 102.0_% RLA
    Evaporator Entering Water Temperature 51.7_F
    Evaporator Leaving Water Temperature 45.8_F
    Chilled Water Flow Switch Flow_
    Chiller Top Level Operating Mode Running_
    Circuit 2
    Air Flow 100.0_%
    Condenser Refrigerant Pressure 223.5_psi gauge
    Saturated Condenser Refrigerant Temperature 138.1_F calculated
    Evaporator Refrigerant Pressure 39.3_psi gauge
    Saturated Evaporator Refrigerant Temperature 44.2_F calculated
    Compressor 2A
    Starts 14,706_
    Supply Oil Temperature 177.0_F
    Intermediate Oil Pressure 211.6_psi gauge

  2. #2
    Join Date
    Sep 2008
    Location
    A land down under
    Posts
    306
    113F/45C that is a decent ambient, with 14706 sarts the compressor hours must be up there.

    A simple suggestion but would first recommend you check the oil level in this circuit if you have not done so. With screw chillers the oil level in the seporator plays a huge part in noise attenuation.
    Last edited by Screwit; 07-19-2010 at 03:11 PM.

  3. #3
    Join Date
    Mar 2004
    Location
    ottawa canada
    Posts
    2,011
    Ditto on Screwits post . Oil level . If thats good it could be a broken discharge check valve spring .
    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
    Jun 2010
    Location
    U.A. (upper Alabama)
    Posts
    835
    I'm with the other guys on this, if oil level is low add a little OIL00048 and see if it quitens down. If it does you prob. have oil in your evap. Run circuit unloaded, yes unloaded to get oil back, then you might have blow some oil back out. Check oil return valve on bottom of evap. to make sure it's open.

  5. #5
    Join Date
    Mar 2004
    Location
    ottawa canada
    Posts
    2,011
    If the oil isnt on the floor its in the evap . DONT PUT OIL IN IT YOU WILL MAKE IT WORSE . Run it unloaded to bring the oil back , and figure out why it went into the evap in the first place .
    If the oil leaked out then yes add it to the correct level .
    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
    Join Date
    Jun 2010
    Location
    U.A. (upper Alabama)
    Posts
    835
    Quote Originally Posted by graham View Post
    If the oil isnt on the floor its in the evap . DONT PUT OIL IN IT YOU WILL MAKE IT WORSE . Run it unloaded to bring the oil back , and figure out why it went into the evap in the first place .
    If the oil leaked out then yes add it to the correct level .
    I said add a little oil, graham, not five gallons.

  7. #7
    Join Date
    Jul 2010
    Posts
    6
    thanks everyone, we found the problem it's because of check valve ,thanks a lot

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