Can anyone tell me what the minumum pressure differential should be between the evaporator and condenser on a Trane CVHE 400 ton machine? A Trane salesman sent me an e-mail stating
"For the varying of the condenser water flow, we just need to make sure that a 23 psid refrigerant pressure differential is maintained between the evaporator and condenser."
I am starting up some chillers that our company made the primary chilled and condenser loop a varible flow system.
Any help is appreciated.