AIRC 1040 Syllabus

Subject Code

AIRC

Course Number

1040

Course Title

HVACR Electrical Motors

Prerequisites

Corequisites

AIRC 1030

Terms Offered

Credit Hours

Course Description

This course provides students with the skills and knowledge necessary for application and service of electric motors commonly used by the refrigeration and air conditioning industry. Topics include diagnostic techniques, capacitors, installation procedures, types of electric motors, electric motor service, and safety.

Course Outcomes

 

Diagnostic Techniques

  • Discuss the four types of belt and pulley drives.
  • Inspect the belt guards on lab equipment.
  • Remove and/or install belts.
  • Adjust belt tension on V-belts or drive belts.
  • Adjust and/or align pulleys and motors
  • Discuss safety concerns found in working with motors, pulleys, and drive belts.

 

Capacitors 

  • Define a capacitor.

 

  • Define the term microfarad.
  • Observe the use of capacitors on lab equipment.
  • Properly test various capacitors with volt-ohm millimeter (VOM) and capacitor tester.
  • Demonstrate how to properly discharge a capacitor.

 Installation Procedures 

  • Properly install a condenser fan motor.

 

  • Properly install an evaporator fan motor.

Types of Electric Motors 

  • Explain the principles of three-phase motor operation.
  • Explain the principles of shaded motor operation.
  • Explain the principles of split-phase motor operation.
  • Explain the principles of capacitor start motor operation.
  • Explain the principles of PSC motor operation.
  • Explain the principles of CSR motor operation.
  • Explain the principles of ECM motor operation.
  • Explain the operation of single-phase motor starting components.
  • Classify motors used in the HVAC industry.
  • Recognize ECM variable speed motors.
  • Discuss the various motor applications.
  • Describe methods of starting single phase electrical motors.
  • Describe methods of protecting single phase electrical motors.
  • Describe methods of starting and protecting electrical motors.
  • Differentiate between motor windings in both single and three-phase motors.
  • Properly connect a single-phase motor to include all starting components.
  • Describe methods of starting three phase electrical motors.
  • Describe methods of protecting three phase electrical motors.

 Overload Devices

  • Discuss the difference between a thermal overload and a magnetic overload.
  • Replace a thermal overload on an air conditioning compressor.
  • Check for continuity in thermal overloads.

 Magnetic Starters

  • Discuss the differences between a magnetic starter and contractor.

 

  • Replace a magnetic starter on a compressor.
  • Test a magnetic starter with a VOM.

 Electric Motor Service

  • Check electric motors for proper rotation.
  • Isolate electric motor malfunctions.
  • Remove or install electric motor components.
  • Remove or install an electric motor.
  • Discuss the installation of bearings on shafts.
  • Remove or install fans or blowers.
  • Reverse motor current rotation.
  • Measure motor current draw.
  • Reset motor thermal overloads.
  • Test motor running or starter windings.
  • Test starting or running capacitors.
  • Wire in a motor to the power source.

 Safety

  • Discuss the safety hazards found in working with electric motors and their components.
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