Revised 1/ 2013

AIR 235 - Heat Pump (4 CR.)

Course Description

Studies theory and operation of reverse cycle refrigeration including supplementary heat as applied to heat pump systems, including service, installation and maintenance. Lecture 3 hours. Laboratory 3 hours.

General Course Purpose

This course is designed to prepare students for employment in the refrigeration and air conditioning field.

Course Prerequisites/Corequisites

Prerequisites: AIR 122 and 134

Course Objectives

Upon completion of this course, the student should be able to:

• Perform tests to determine proper air flow
• Test heat pumps in the cooling mode for correct charge
• Test heat pumps in the heating mode for correct charge and BTU output
• Evaluate and confirm defrost systems
• Compare R22 to R410A systems

Major Topics to Be Included

• Electric resistance heat
  • Types of heaters
  • Line and low voltage control
  • Thermostats indoor and outdoor
• Air system check
  • Temperature rise method
  • Total CFM
  • Auxiliary heat
• Basic principles
  • Reverse cycle
  • Air and water source
  • Electrical control
• Refrigeration cycle components
  • Compressors and reversing valves
  • Metering devices and check valves
  • Accumulators and heat exchangers
• Heat pump installation
  • Split and package systems
  • Line set leak testing
  • Power and control wiring
• Start up and check out
  • Air system test
  • Superheat and subcooling test
  • System capacity test
• Troubleshooting
  • Refrigeration problems
  • Electrical problems
  • Defrosting problems
• Other heat pump systems
  • Liquid to air
  • Air to liquid
  • Liquid to liquid
  • Dual fuel