After an overview of electric terminology, the attendee will learn the operation of various electrical devices used in HVAC systems and the procedures for troubleshooting them. It incorporates principles of relays and other switching mechanisms and covers the basic principles of reading schematic wiring diagrams. The attendee will become familiar with HVAC electrical devices and circuits and will be able to use this knowledge to troubleshoot electrical controls and electrical systems in order to repair them.
This course has one lab exercise and several in which the instructor demonstrates troubles on commercial air conditioner/furnace system components and the students work in groups of 2 or 3 using a schematic to identify faulty electrical components.
- Identify basic electric circuit terms, components and operation.
- Describe the function and operation of a circuit breaker, fuse and transformer.
- Locate, identify and state the function of relay and motor starter parts, describe the operation of a relay and motor starter and identify the various relay types.
- Identify the various switch wiring arrangements and their operating characteristics.
- Describe procedures for using various meters for troubleshooting circuits for opens, shorts and defective components.
- Identify the expected operation at each terminal of a thermostat.
- Identify common symbols, demonstrate proper use of a legend and describe the operating sequence using a schematic wiring diagram.
- Demonstrate troubleshooting procedures to successfully isolate circuit problems using a refrigeration schematic wiring diagram.
- Describe use of the black box method of troubleshooting P.C. boards.
- Describe the operation of various single-phase motors, the 3-phase motor, compressor motor starting relays and starters and motor testing procedures.