This question is for anyone who is familiar with centrifugal chillers. We are getting an chiller ice plant at the school where I work. The company that's doing the design/build wants to install two 500 ton trane HCFC 123 chillers so we can get LEED pts. I would prefer HFC 134A chillers because 123 is soon being phased out and inventory will be low. I have heard from another centrifugal service tech that trane's have rotor bar problems. what about the reliability of trane chillers as opposed to york,carrier, or mcquay? any thoughts anyone?