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What's New at DreisilkerSiteStuff's Quarterly ONSITE Features Motor Doc Tips for Cooling Towers Cooling Tower Startup Considerations
by Howard W Penrose, Ph.D., CMRP
The time for startup of chillers is upon a great many commercial properties and the challenge that has existed for decades returns: how do you verify the condition of your chiller motor before startup?
Common testing for electric motors includes vibration analysis for mechanical components and insulation resistance (Meg-Ohm) testing for winding insulation. However, vibration analysis is challenging and may miss critical findings due to the location of bearings and mechanical components and insulation resistance and high voltage tests are frowned upon by a number of hermetic chiller manufacturers. Improper information on the interpretation of results and understanding test standards creates additional challenges to determining the condition of your chiller motor.
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