The college where I work has a 80 ton air cooled trane chiller that is on the science building with 100% outside air. [no return] The problem I am having is this machine will not run in this 108-110 tempture I have been running it at sundown till about 12 noon when it goes down on oil high temp which is above 170 degrees . All fans are running the coils are clean . I have been told that this is all it is going to do due to 100% outside air . My question is anybody got any ideas ? By the way I am located in southern Oklahoma.