Service Procedures - Desa B155DST Manual De Propietario

WARNING: To avoid risk of
burn and electrical shock, never
attempt to service heater while it
is plugged in, operating, or hot.
UPPER SHELL REMOvAL
1. Remove screws along each side of heater
using 5/16" nut-driver. These screws at-
tach upper and lower shells together. See
Figure 6.
2. Lift upper shell off.
3. Remove fan guard.
Figure 6 - Upper Shell Removal
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 (see Figure 7).
1. Remove upper shell (see Figure 6).
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 8).
7. Place setscrew on flat of shaft. Tighten
setscrew firmly (40-50 inch-pounds/4.5-
5.6 n-m).
8. Replace fan guard and upper shell.
10

SerVice prOcedureS

Screw
Upper Shell
Fan
Guard
www.desatech.com
Setscrew
Motor Shaft
Figure 7 - Fan, Motor Shaft, and
Setscrew Location
Setscrew
Motor
Motor
Shaft
Figure 8 - Fan Cross Section
AIR OUTPUT, AIR INTAKE AND LINT
FILTERS
1. Remove upper shell (see Figure 6).
2. Remove filter end cover screws using
5/16" nut-driver (see Figure 9).
3. Remove filter end cover.
4. Replace air output and lint filters.
5. Wash or replace air intake filter (see Preven-
tative Maintenance Schedule, page 8).
6. Replace filter end cover.
7. Replace fan guard and upper shell.
IMPORTANT: Do not oil filters.
Lint Filter
Air Output Filter
Figure 9 - Air Output, Air Intake, and Lint
Fan
Fan
Flush
Air Intake Filter
Filter End
Cover
Filters
122358-01A