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Thread: McQuay WSC063 scale
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07-29-2011, 11:42 PM #1
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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!
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09-28-2011, 08:05 PM #2
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99% of the time, it is condensation on the terminals. Clean, dry and then seal with silicone.
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09-29-2011, 10:52 AM #3
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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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