Blower Motor
— Burner Head Assembly
Capacitors
Combustion Blower and Housing
Heater Case Assembly
Heat Exchanger
Painted Surfaces
TM 54520-253-13
Section II. MAINTENANCE PROCEDURES
INDEX
Page
4-47
4-51
4-62
4-64
4-46
4-40
4-33
4-35
4-67
4-72
4-39
Printed Circuit (PC) Board
Assembly
Printed Circuit (PC) Board
Assembly Wiring Receptacle
Printed Circuit (PC) Board
Assembly Wiring Terminals
Shields and Shield Insulator
Thermal Motor Protector
Ventilating Air Motor
Ventilating Air Motor Capacitor
Page
4-12
4-26
4-21
4-24
4-37
4-44
4-53
4-58
4-60
4-2. GENERAL INSTRUCTIONS
Maintenance instructions in this section will list resources required, personnel required, and equipment condition
for the start of the procedure. Note the following:
• Resources required are not listed unless they apply to the procedure.
• Personnel required are listed only if the task requires more than one. If PERSONNEL is not listed, it means one
person can do the task.
• The normal standard equipment condition to start a maintenance task is heater shut down and at room tempera-
ture. EQUIPMENT CONDITION is not listed unless some other condition is required besides power off and
equipment cooled.
4-11
