Credits: 5This course covers heat pumps and their operation. It will teach various defrost methods including time temperature, demand, air switch and other defrost controls. Charging methods which include superheat, weigh-in and dial-a-charge. The course will also include compressor change out methods and advance wiring. C.O.P.,E.E.R., SEER rating and design points of heat pumps. Prerequisite(s):AC 110B.