Standard

  rev.07/03/03

APS 101 – Laundry Appliances I

Course Description

Provides knowledge and skills in diagnosis and repair of major household laundry appliances. Emphasis is placed on servicing gas dryers and electric dryers. Topics include: component application and identification; diagnosis and repair of malfunctioning electrical, electronic and mechanical components; wiring diagram interpretation; and dryer installation.

 

Competency Areas

Hours

Component Application and Identification

Class

3

Diagnosis and Repair of Malfunctioning Electrical, Electronic and Mechanical Components

D. Lab

2

Wiring Diagram Interpretation

P. Lab/O.B.I.

3

Dryer Installation

Credit

 5

 

 

 

Prerequisite:  APS 100

 

 

Corequisite:

 

 

  

Course Guide

 

Competency

After completing this section, the student will:

Hours

Class

D. Lab

P. Lab/

O.B.I.

COMPONENT APPLICATION AND IDENTIFICATION          

10 

8

0

Belt drives

Identify laundry appliance drive belts by type and size.

 

 

 

 

Describe the function of laundry appliance drive belts.

 

 

 

 

Identify laundry appliance pulleys and idler assemblies by type and size.

 

 

 

Drum assemblies

Identify laundry appliance drums, drum rollers, and support bearings.

 

 

 

 

Describe the function of laundry appliance drums, drum rollers, and support bearings.

 

 

 

Electric dryer components

Identify laundry appliance blower assemblies, cables, heating elements, temperature controls, and motors.

 

 

 

 

Describe the function of laundry appliance blower assemblies, cables, heating elements, temperature controls, and motors.

 

 

 

Gas dryer components

Identify laundry appliance burner assemblies, ignition systems, and regulators.

 

 

 

 

Describe the function of laundry appliance burner assemblies, ignition systems, and regulators.

 

 

 

DIAGNOSIS AND REPAIR OF MALFUNCTIONING ELECTRICAL, ELECTRONIC AND MECHANICAL COMPONENTS

6 

2

30

Belt drives

Tighten laundry appliance drive belts.

 

 

 

 

Replace laundry appliance drive belts.

 

 

 

 

Determine the serviceability of laundry appliance pulley and idler assemblies.

 

 

 

 

Lubricate laundry appliance pulley shafts and bearings.

 

 

 

 

Lubricate laundry appliance idler shafts and bearings.

 

 

 

 

Replace laundry appliance pulleys, idlers, sheaves, and bearings.

 

 

 

Drum assemblies

Determine the serviceability of laundry appliance drum, support bearings, and rollers.

 

 

 

 

Replace laundry appliance drums.

 

 

 

 

Lubricate laundry appliance support bearings.

 

 

 

 

Replace laundry appliance support bearings.

 

 

 

 

Lubricate laundry appliance drum rollers.

 

 

 

 

Replace laundry appliance drum rollers.

 

 

 

Electrical components

Identify laundry appliance blower assemblies, heating elements, motors, and circuitry components.

 

 

 

 

Describe the function of laundry appliance blower assemblies, heating elements, motors, and circuitry components.

 

 

 

 

Isolate defective laundry appliance components using manufacturers' service manual troubleshooting procedures.

 

 

 

 

Repair or replace laundry appliance blower assemblies, electrical heating elements, and motors electrical wiring cables.

 

 

 

Gas components

Identify hazards associated with laundry appliance gas and exhaust gas leaks.

 

 

 

 

Identify laundry appliance gas dryer ignition systems, burner assemblies, and regulators.

 

 

 

 

Describe the function of laundry appliance gas regulators.

 

 

 

 

Test laundry appliance gas burners, ignition systems, and regulators for serviceability.

 

 

 

 

Test laundry appliance gas line couplings for leaks using both electronic devices and soapy water.

 

 

 

 

Service gas ignition systems, gas burner assemblies, gas regulators.

 

 

 

WIRING DIAGRAM INTERPRETATION

10 

8

0

Wiring and pictorial diagrams

Identify diagram symbols for components of gas and electric dryers.

 

 

 

 

Interpret dryer schematic wiring diagrams.

 

 

 

 

Interpret dryer pictorial diagrams.

 

 

 

Timer sequence charts

Interpret dryer timer sequence charts.

 

 

 

DRYER INSTALLATION

4 

2

0

Tools and equipment

Select tools and equipment needed for dryer installation using manufacturers' service manuals.

 

 

 

Manufacturers' installation procedures

Identify manufacturers' recommendations for transporting dryers.

 

 

 

Transporting dryers

Demonstrate equipment lifts, dollies, and appliance hand trucks used to transport dryers.

 

 

 

Vent and hood

Determine vent and hood sizes needed for specific laundry appliances.

 

 

 

 

Install laundry appliance vents and hoods in a real or simulated installation site.

 

 

 

Installation

Install electric and gas dryers using manufacturers' instructions.

 

 

 

Inspecting gas lines

Test couplings of gas lines for leaks.

 

 

 

 

Suggested Resources

 

Books

Meyerink, G. Appliance servicing handbook. Englewood Cliffs, NJ: Prentice Hall.

Whirlpool Corporation. Gas basics - Dryer and range burners, G-17. LaPorte, IN: Author.

Whirlpool Corporation. Gas burners for clothes dryers, L-36. LaPorte, IN: Author.

Whirlpool Corporation. Reading and understanding wiring diagrams for dryers, L-50. LaPorte, IN: Author.

Whirlpool Corporation. Servicing procedures for mechanical systems in Whirlpool dryers, L-33. LaPorte, IN: Author.

Whirlpool Corporation. Understanding laundry electrical controls and components, L-40. LaPorte, IN: Author.

 

Audiovisuals

Whirlpool Corporation. Gas basics - Dryers and range burners, L-17 (Videocassette No. LIT 4314011). LaPorte, IN: Author.

Whirlpool Corporation. Gas burners for clothes dryers, L-36 (Videocassette No. LIT 603141). LaPorte, IN: Author.

Whirlpool Corporation. Reading and understanding wiring diagrams for dryers, L-50 (Videocassette No. LIT 677741). LaPorte, IN: Author.

Whirlpool Corporation. Servicing procedures for mechanical systems in Whirlpool dryers, L-33 (Videocassette No. LIT 6025801). LaPorte, IN: Author.

Whirlpool Corporation. Understanding laundry electrical controls and components, L-40 (Videocassette No. LIT 603919). LaPorte, IN: Author.