Credit Courses

(HRA) Heating, Refrigeration and Air Conditioning

HRA 101 - Principles of Refrigeration / Air Conditioning I (2 credits)
Corequisite: MAT 037 (or MAT 037A and 037B) or equivalent proficiency
Fundamental principles of pressure and temperature relationships, heat transfer, and heating and cooling concepts. Specific topics include leak detection, types of refrigerants, piping materials, and connections. [Fall offering] 1 lecture/2 laboratory hours
course outline

HRA 102 - Principles of Refrigeration / Air Conditioning II (2 credits)
Prerequisite: HRA 101
Corequisite: EET 130 or equivalent
Fundamental operating principles of compressors, condensers, and evaporators. Specific topics include types of metering devices, general accessory configuration, and procedures for charging and evaluating systems. [Fall offering] 1 lecture/2 laboratory hours
course outline

HRA 103 - Refrigeration / Air Conditioning Electrical Controls (4 credits)
Prerequisites: EET 130, HRA 102
Examines types and application of various electromechanical devices such as motors, contractors, overload devices, thermostats, controls, and relays as well as various types of test and metering equipment. 2 lecture/4 laboratory hours
course outline

HRA 104 - Domestic Heating and Air Conditioning Systems (4 credits)
Prerequisite: HRA 103
Operating fundamentals for the diagnosis and repair of various domestic heating and cooling units including window and central units, refrigerators, freezers, gas furnaces, and heat pumps. 2 lecture/4 laboratory hours
course outline

HRA 202 - Light Commercial Systems I (2 credits)
Prerequisites: EET 130, HRA 103, HRA 104
Corequisite: HRA 203
Explores electrical and mechanical component configurations, including wiring and controls, for light commercial systems. 1 lecture/2 laboratory hours
course outline

HRA 203 - Light Commercial Systems II (2 credits)
Prerequisites: EET 130, HRA 104
Corequisite: HRA 202
Study of electromechanical light commercial system operation, diagnosis and repair, including piping configurations, defrost systems, pressure switches, and pressure regulators. 1 lecture/2 laboratory hours
course outline

HRA 205 - Heavy Commercial Systems (4 credits)
Prerequisite: HRA 104
Operation, maintenance, diagnosis, and repair of heavy commercial systems including electrical controls, mechanical components, and electrical circuitry. [Fall offering] 1 lecture/4 laboratory hours
course outline

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