Service Procedures - Desa H.S.I. Serie Manual Del Propietário

SERVICE PROCEDURES

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 attach upper and
lower shells together. See Figure 7 or 8.
2. Lift upper shell off.
3. Remove fan guard.
Screw
Figure 7 - Upper Shell Removal,
40/50/60/70 Models Only
Figure 8 - Upper Shell Removal,
110/115/155/165/200 Models Only
FAN
IMPORTANT: Remove fan from motor shaft be-
fore removing motor from heater. The weight of
the motor resting on the fan could damage the fan
pitch (see Figure 9).
1. Remove upper shell (see Figure 7 or 8).
2. Use 1/8" allen wrench to loosen setscrew
which holds fan to motor shaft.
3. Slip fan off motor shaft.
114008-01A
Upper Shell
Fan Guard
Screw
Upper Shell
Fan
Guard
www.desatech.com
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 10).
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.
Setscrew
Motor Shaft
Figure 9 - Fan, Motor Shaft, and
Setscrew Location
Setscrew
Motor
Motor
Shaft
Figure 10 - Fan Cross Section
AIR OUTPUT, AIR INTAKE AND LINT
FILTERS
1. Remove upper shell (see Figure 7 or 8).
2. Remove filter end cover screws using 5/16" nut-
driver (see Figure 11 or Figure 12, page 10).
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 7).
Lint Filter
Air Output Filter
Figure 11 - Air Output, Air Intake, and
Lint Filters, 40/55/60/70 Models Only
Fan
Fan
Flush
Air Intake Filter
Filter End
Cover
9