What is your job title?
Why have you come here looking for answers?
Why have you not yet hired a contractor?
You have made it very clear that you don't understand this machine, what exactly are you looking to gain here?
You see, when I see someone asking "What should my set points be for this 500 ton chiller" I get very concerned as to who is asking and why they are asking.
Maintance men need to keep their booger hooks off the buttons... If you catch my drift.