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 25).

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 26 - Fan, Motor Shaft,

 

and Setscrew Location

Figure 27 - Fan Cross Section

IGNITION CONTROL ASSEMBLY

WARNING: Unplug heater before servicing.

Remove Old Assembly

Figure 24 - Gap Adjusting Screw Locations

Sandpaper

Figure 25 - 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 27).

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.

1.Using the 5/16" nut driver or socket wrench, remove the four side cover screws (see Figure 28).

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 29). Repeat this for the other four printed circuit board supports then remove the assembly.

Side Cover

Figure 28 - Removing Cover

Side Cover

Ignition Control

Assembly

Printed Circuit

Board Supports (5)

Figure 29 - Removing Circuit Board

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Image 15
Desa GK30 Ignition Control Assembly, Fan, Remove Old Assembly, Reinstall insert and rotor Perform steps 10 through 12