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Thread: Carrier 19XR Centrifs
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19-12-2009, 11:44 AM #9
Re: Carrier 19XR Centrifs
The 19XR doesn't tolerate condenser water temps at part load that are too high and will part load surge. The CW temps are run lower than the low pressure machines. The 19XR can tolerate lift of 16dC in theory, but at part load say 60% I've seen them surge at 26 dC condenser water into the vessel. Make sure your flow rates are good and as per design as well. If you are smashing impellers, then it will probably be as a result of extended surge, or possibly poor lubrication as mentioned. For oil migration, the pnly practical way to get the oil back if you are short cycling and pumping it to the cooler is to bridge out the discharge superheat transducer and run the machine for the day. Monitor it VERY carefully and you should get your oil back.
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