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HVAC Engineering Technology (HET)
Engineering, Math & Physical Sciences


The following course information is effective for the Fall 2010 term.

Subj CatNoCourse TitleUnits   
HET 250Air Conditioning II Commercial HVAC Appliances4 units  

This course covers intermediate principles, practices, operations, service and installation of commercial HVAC equipment through lectures, demonstrations, and lab experiences conducted on commercial HVAC equipment. The function and operational characteristics of various types of commercial HVAC equipment, its wiring, and safety procedures are studied. Electric controls including thermostats, defrost controls, relays, and contactors are studied, as well as capacitors, power distribution, motors, protective devices, system malfunction diagnosis, corrective procedures, and the refrigerants used in the commercial HVAC industry. This course also introduces hydronic heating, air mixing properties, installation and service, a basic understanding of load calculations, ducting, fan laws, and piping techniques for commercial HVAC equipment. This course also reinforces ventilation requirements, the use and operation of electrical and mechanical test equipment, wiring diagrams and schematics, service manifolds, test equipment, flaring, soldering and brazing skills.
NOTE: Student will be required to purchase basic hand tools used in this and other HVACR courses.

Prerequisite: HET 150 and MTH 114 or higher or appropriate score on Math Placement test or Math ACT score of 17 or higher; and minimum APT score of 122 or minimum CELSA score of 50, or Language Proficiency; or Consent of Instructor

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College of Lake County, 19351 West Washington Street, Grayslake, IL 60030-1198    (847) 543-2000