SERVICE PROCEDURES
13
SERVICE PROCEDURES
Continued
13.Perform steps 1 through 6, page 12.
14.Place fine grade sandpaper (600 grit) on flat surface. Sand ro- tor lightly in “figure 8” motion four times (see Figure 26).
Fan |
Setscrew |
15.Reinstall insert and rotor.
16.Perform steps 10 through 12, page 12.
Gap Adjusting
Screw
Blade
Rotor
Gap Adjusting
Screw
.076/.101 mm (.003"/.004") Gap Measured With Feeler Gauge
| Fan |
| Flush |
| Motor |
Motor | Shaft Setscrew |
Shaft |
|
Figure 27 - Fan, Motor Shaft, |
|
and Setscrew Location | Figure 28 - Fan Cross Section |
IGNITION CONTROL ASSEMBLY
WARNING: Unplug heater before servicing.
Remove Old Assembly
Figure 25 - Gap Adjusting Screw Locations
Sandpaper
Figure 26 - Sanding Rotor
FAN
IMPORTANT: Remove fan from motor shaft before removing motor from heater. The weight of the motor resting on the fan could damage the fan pitch.
1.Remove upper shell (see page 8).
2.Use 1/8" allen wrench to loosen setscrew which holds fan to motor shaft.
3.Slip fan off motor shaft.
4.Clean fan using a soft cloth moistened with kerosene or solvent.
5.Dry fan thoroughly.
6.Replace fan on motor shaft. Place fan hub flush with end of motor shaft (see Figure 28).
7.Place setscrew on flat of shaft. Tighten setscrew firmly 4.5 to 5.6
8.Replace fan guard and upper shell.
1.Using the 5/16" nut driver or socket wrench, remove the four side cover screws (see Figure 29).
2.Disconnect the nine wires from the ignition control assembly.
3.Using needle nose pliers, squeeze the tab on the printed circuit board support and lift up on the edge of the ignition control assembly (see Figure 30). Repeat this for the other four printed circuit board supports then remove the assembly.
Side
Cover
Figure 29 - Removing Cover
Side Cover
Ignition Control
Assembly
Printed Circuit
Board Supports (5)
Figure 30 - Removing Circuit Board
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