Came across a unit ventilator in a college today with a CCN controller. I need to change the OA cooling lockout setpoint. I called the local Carrier rep and he quoted me $1400 for a copy of the DOS version of the CCN Network Service Tool. Does this sound reasonable? Is there another way to change this setpoint. Surely it would be easier to yank the control all together and replace it with something else. This unit is not on a network and the original installation contractor is no longer in the picture. Any suggestions or help would be greatly appreciated.