Advanced study of the vapor-mechanical compression refrigeration system specific to the heat pump, liquid chiller, environmental chamber, and clean room application. Discussion and laboratory practice covers advanced equipment and system installation, operation, and service techniques, with emphasis on the service of advanced equipment. Additional topics include residential and commercial ventilation and exhaust systems. 3 Credits (1 Lecture - 6 Lab) Prerequisite(s): ACR236 and ACR239 or ACR236 and ACR238.