Mike Boyett
08-09-2007, 11:11 AM
If this has been discussed before then I apologize but I could not find anything using the search feature.
I've read the discussions regarding the pro's and con's of using the temperature split (supply -vs- return temps) on freon based a/c systems. Earlier this week I inspected a fairly expensive hi-rise condo unit that used a chiller for the a/c system. The building purchased btu's from the city, ran city chilled water thru a heat exchanger for the entire building and then circulated the resulting secondary chilled water thru-out the building for each unit's individual a/c. For lack of a better method I used the temp split as an indicator of the proper performance of that system. My question is, can I use the 14° to 21° split that I normally use for a freon based split system as a guide for a chiller system? If not, then what split temp or other method should I have used to judge the performance of the system?
I've read the discussions regarding the pro's and con's of using the temperature split (supply -vs- return temps) on freon based a/c systems. Earlier this week I inspected a fairly expensive hi-rise condo unit that used a chiller for the a/c system. The building purchased btu's from the city, ran city chilled water thru a heat exchanger for the entire building and then circulated the resulting secondary chilled water thru-out the building for each unit's individual a/c. For lack of a better method I used the temp split as an indicator of the proper performance of that system. My question is, can I use the 14° to 21° split that I normally use for a freon based split system as a guide for a chiller system? If not, then what split temp or other method should I have used to judge the performance of the system?