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Thread: York YCAV0157

  1. #1
    Join Date
    Jul 2015
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    Bracebridge On Canada
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    York YCAV0157

    Recently replaced screw compressor for York YCAV chiller, worried about timing on checking rotation? Can anyone inform me on how long I have to check rotation? System is VFD drive and can be shut down at system switch but takes a few seconds.

  2. #2
    Join Date
    Dec 2014
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    New Mexico
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    If you matched wire for wire at the compressor terminals should not be a problem. If unsure match the wiring diagram for wire numbers.
    You have a minute or two to shut it down.


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  4. #3
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    Jul 2015
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    Bracebridge On Canada
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    Thread Starter
    Yes system compressor wires were matched and identified upon replacement. If not correct, net oil pressure should not increase ?

  5. #4
    Join Date
    Dec 2014
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    New Mexico
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    Yes correct


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  7. #5
    Join Date
    Apr 2020
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    va
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    Use a phase sequence meter on the drive output wiring.

    Will only run a few seconds-2-3 minutes without lubrication before severe damage. Discharge check location also has a bearing on time.

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  9. #6
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    Apr 2016
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    Maryland
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    I always pump some oil into the suction prior to start to prevent a " DRY START " never lost one on start up
    Last edited by CHILLERSVCMAN; 09-25-2020 at 03:18 PM. Reason: more info

  10. #7
    Join Date
    Dec 2014
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    You could close the oil line isolation valve and pump oil into the oil filter cover plate. A quart should do it fill the filter cavity and push down the oil passages into the bearings. A quart could be pulled out after the system settles down. Who knows could be pulling back a lot of oil with the new compressor.


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