Desa B50G - Manual (Page 9)

9
102016
SERVICE
PROCEDURES
WARNING !
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.
Never service heater while it is plugged in, operating, or
hot. Severe burns and electrical shock can occur.
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.
Upper
Shell
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.
Figure 4 - Upper Shell Removal
Fan
Guard
Lint Filter
Air Output
Filter
Fan
Guard
Filter End
Cover
Air Intake
Filter
Figure 6 - Air Output, Air Intake
Figure 5 - Fan Cross Section
Flush
Motor
Fan
Setscrew
Motor
Shaft