| Standarfd |
ACT 104 – Electric
Motors
Continues the development of 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.
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Competency
Areas |
Hours |
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Diagnostic Techniques |
Class |
2 |
|
Capacitors |
D. Lab |
2 |
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Installation Procedures |
P. Lab/O.B.I. |
3 |
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Types of Electric Motors |
Credit |
4 |
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Electric Motor Service |
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Prerequisite/Corequisite: |
| Course Guide |
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Competency |
After completing this
section, the student will: |
Hours | ||
|
Class |
D.Lab |
P.Lab/
O.B.I. | ||
DIAGNOSTIC
TECHNIQUES |
3 |
3 |
5 | |
|
Drive
belt and pulley theory |
Discuss
the four types of belt and pulley drivers. |
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Safety
considerations |
Discuss
safety concerns found in working with motors, pulleys, and drive
belts. |
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Belt
guards |
Inspect
the belt guards on lab equipment. |
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Belt
and pulley installation |
Remove
or install belts. |
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Remove or install pulleys. |
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Belt
alignment and adjustment |
Adjust
belt tension, such as V-belts or drive belts. |
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Adjust pulleys. |
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Align motors. |
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Align pulleys. |
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CAPACITORS |
1 |
4 |
5 | |
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Theory |
Define
a capacitor. |
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Define the term microfarad. |
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Applications |
Observe
the use of capacitors on lab equipment. |
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Troubleshooting |
Properly
test various capacitors with volt ohm millimeter (VOM) and capacitor
tester. |
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Safety |
Demonstrate
how to properly discharge capacitor. |
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INSTALLATION
PROCEDURES |
3 |
3 |
10 | |
|
Application
|
Install
electric motors. |
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TYPES OF ELECTRIC
MOTORS |
9 |
5 |
5 | |
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Theory
|
Explain
principles of motor operation. |
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Connect three phase motor starting components. |
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Identifying
motor types |
Classify
motors used in the HVAC industry. |
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Introducing
motor applications |
Discuss
motor applications. |
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Starting
single phase motors and motor protection devices |
Describe
methods of starting and protecting electrical motors. |
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Differentiate between motor windings. |
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Connect single-phase motor starting components. |
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Starting
three phase motors and motor protection devices |
Describe
methods of starting and protecting electrical motors. |
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Differentiate between motor winding. |
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ELECTRIC MOTOR SERVICE |
3 |
5 |
5 | |
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Service
and Troubleshooting |
Check
motors for proper rotation. |
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Isolate electric motor malfunctions. |
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Discuss installation of bearings on shafts. |
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Remove or install electric motor components. |
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Remove or install electric motors. |
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Remove or install fans or blowers. |
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Reverse motor current rotation. |
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Measure motor current draw. |
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Reset motor thermal overloads |
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Test motor running or starting windings. |
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Test starting or running capacitors. |
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Wire in motors to power source. |
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SAFETY |
1 |
0 |
0 | |
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Safety
hazards |
Discuss
the safety hazards found in working with electric motors and their
components. |
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| Suggested Resources |
Althouse, A. D., et al. (1988). Modern refrigeration & air
conditioning. South Holland, IL: Goodheart-Willcox.
http://www.goodheartwillcox.com/.
Haines, R. (1987). Control systems for heating, ventilating,
& air conditioning (4th ed.). New York: Van Nos Reinhold.
Herman, S. L., & Sparkman, B. L. (1986). Electricity & controls for heating,
ventilating, & air conditioning (4th ed.). Albany, NY: Delmar.
http://www.delmar.com/.
Langley, B. C. (1985). Control systems for air conditioning &
refrigeration. Englewood Cliffs, NJ: Prentice Hall. http://www.cefga.org/.
Langley, B. C. (1986). Cooling systems troubleshooting
handbook. Englewood Cliffs, NJ: Prentice Hall. http://www.cefga.org/.
Langley, B. C. (1988). Electric controls for refrigeration &
air conditioning (2nd ed.). Englewood Cliffs, NJ: Prentice Hall.
http://www.cefga.org/.
Long, W. (1985). Refrigeration & air conditioning:
Operation & analysis servicing. New York: Macmillan. http://www.macmillan.com/.
Miles, L. (1987). Refrigeration & air conditioning
(2nd ed.). Englewood Cliffs, NJ: Prentice Hall. http://www.cefga.org/.
Miller, R. (1983). Refrigeration and air conditioning
technology. New York: Bennett Il.
Miller, R. (1988). Electricity for heating, air conditioning
& refrigeration. San Diego, CA: Harcourt Brace Jovanovich. http://www.harcourt.com/.
National
Center for Construction Education and Research (latest edition). NCCER: Core
Curricula: Basic Communication
Skills. Englewood Cliffs, NJ: Prentice Hall. http://www.cefga.org/.
Prasad, M. (1983). Refrigeration & air conditioning.
New Delhi: Wiley Eastern, Ltd. http://www.wiley.com/.
Rudman, J. (1991). Air conditioning, heating &
refrigeration mechanic. Syosset, NY: National Learning.
Smith, R. E. (1987). Electricity for refrigeration, heating &
air conditioning. Albany, NY: Delmar. http://www.delmar.com/.
Swenson, S. D. (1990). Troubleshooting & servicing air
conditioning equipment. Troy, MI: Busn News.
Terminology of heating, ventilation, air
conditioning, & refrigeration. (1986). Atlanta: American Heating,
Refrigeration, & Air Engineering.
Whitman, W., & Johnson, W. (1991). Refrigeration & air conditioning
technology (2nd ed.). Albany, NY: Delmar. http://www.delmar.com/.