Desa B50H - Manual (Page 8)

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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.
!
Fan
Motor
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 4).
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 6).
6. Replace filter end cover.
7. Replace fan guard and upper shell.
IMPORTANT: Do not oil filters.
Figure 3 - Upper Shell Removal
Figure 5 - Air Output, Air Intake, and Lint Filters
Flush
Setscrew
Motor
Shaft
Figure 4 - Fan Cross Section
Air Intake Filter
Filter End Cover
Fan Guard
Air Output
Filter
Lint Filter
Upper
Shell
Fan
Guard