McQuay WSC063 scale
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  1. #1
    Join Date
    Sep 2004
    Location
    va.
    Posts
    43

    Confused McQuay WSC063 scale

    Does anyone have a copy of the temperature to resistance curve chart McQuay uses in their WSC063-DAAAM water cooled chillers? I have motor windings sensor causing some issues and I wanted to know what scale they are using. Thanks for any info on them.
    never too old to learn new tricks!

  2. #2
    Join Date
    Sep 2011
    Location
    Heartland
    Posts
    25
    99% of the time, it is condensation on the terminals. Clean, dry and then seal with silicone.

  3. #3
    Join Date
    Sep 2011
    Location
    Heartland
    Posts
    25
    IIRC, the relay should drop out at about 2x the resistance of the relay coil.
    I always just measure voltage. Trip is about 8vdc.
    The resistance is logarithmic. It's fairly low under normal operating conditions and exponentially goes up as motor temp rises. If you truly have high motor temp, it is not unreasonable to see resistances as high as 100k ohms or even 1 MOhm.

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