Checonbill, You seem to be confusing the outlet temp of the unit (44degF) with the ambient operating temperature of 80degF.
Like HVACctrl says, 3rt (36000 BTUH) is a pretty small chiller, and I'm guessing you mean a packaged or split air/air unit.
Manufacturer performance datasheets will provide tables indicating the actual capacity of the unit for different ambient and on-coil conditions - dry bulb, wet bulb, airflow. You can typically expect the actual capacity to be close (+/- 1000BTUH) to the nominal capacity around 80degF ambient, with other conditions typical.