Desa B50G Service Procedures, Upper Shell Removal, Air Output, Air Intake, and Lint Filters

SERVICE PROCEDURES

Upper Shell Removal

1.Remove screws along each side of heater using 5/16" nut-driver. These screws attach upper and lower shells together.

2.Lift upper shell off.

3.Remove fan guard.

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 above).

2.Use 1/8" allen wrench to loosen set-screw which holds fan to motor shaft.

3.Slip fan off motor shaft.

4.Clean fan using soft cloth mois- tened 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 5).

7.Place setscrew on flat of shaft. Tighten setscrew firmly (40-50 inch-pounds).

8.Replace fan guard and upper shell.

Air Output, Air Intake, and Lint Filters

1.Remove upper shell (see above).

2.Remove filter end cover screws using 5/16" nut-driver.

3.Remove filter end cover.

4.Replace air output and lint filters.

5.Wash or replace air intake filter (see Preventative Maintenance Schedule, page 7).

6.Replace filter end cover.

7.Replace fan guard and upper shell.

IMPORTANT: Do not oil filters.

!WARNING

Never service heater while it is plugged in, operating, or hot. Severe burns and electrical shock can occur.

Upper

Shell

Fan

Guard

Figure 4 - Upper Shell Removal

Fan

Motor

Flush

Motor

Shaft

Setscrew

Figure 5 - Fan Cross Section

Air Intake

Filter

Filter End

Cover

Fan

Guard

Lint Filter

Air Output

Filter

Figure 6 - Air Output, Air Intake

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