Master BY100CEH Owner's Manual page 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).
15. Reinstall insert and rotor.
16. Perform steps 10 through 12, page 12.
Gap Adjusting
Screw
Blade
Gap Adjusting
Screw
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 N-m (40 to 50 in-lbs).
8. Replace fan guard and upper shell.
105522
.076/.101 mm
(.003"/.004") Gap
Measured With
Feeler Gauge
Rotor
SERVICE PROCEDURES
Fan
Setscrew
Motor
Shaft
Figure 27 - Fan, Motor Shaft,
and Setscrew Location
IGNITION CONTROL ASSEMBLY
WARNING: Unplug heater before servicing.
Remove Old Assembly
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
Figure 30 - Removing Circuit Board
13
13
Fan
Flush
Motor
Setscrew
Shaft
Figure 28 - Fan Cross Section
Ignition Control
Assembly
Printed Circuit
Board Supports (5)