Hello every one,
Would you please provide some information about the follwoing query.

One of our water chiller having capacity of 110 tons (for standby duty), has experienced a catestrophic failure in which Following parts were found damaged
i) Impeller vanes
ii) Thrust bearing and shaft assembly

It is to be notad that the chiller was being attemted to re-start after jumpering an alarm contacts of thurst bearing temp. high, persuming it false.
What may be the causes of alarm and what happened when it was attempted to re-start after jumpering the alarm.

Please provide the response as soon as possible I shall be thankful to you.

Shahid Raza
Root Cause Analyst.
sraza33@gmail.com

Seems overloading of the chiller , resulting in high thrust values which you presumed to be false.
Is the chiller driven by VFD ?Failure of the bearing has occurred first resulting in failure of the compressor due to rubbing or impacting inside the casing.But Why the thrust bearing failed?Any maintenance done on thrust bearing in near past? What type of thrust bearing is there?
Reagrsd
Irshad