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SERVICE PROCEDURES
8
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
Upper Shell
Fan Guard
Figure 7 - Upper Shell Removal
(40/55T/70T Models Only)
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 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.
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.
Fan
Setscrew
Motor Shaft
Figure 9 - Fan, Motor Shaft,
and Setscrew Location
Upper Shell
Screw
Fan Guard
Figure 8 - Upper Shell Removal
(115T/165T Models Only)
Setscrew
Motor
Motor Shaft
Figure 10 - Fan Cross Section
For more information, visit www.desatech.com
For more information, visit www.desatech.com
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 12.
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.
Lint Filter
Figure 11 - Air Output, Air Intake, and Lint Filters, 40/55T/70T Models
Lint Filter
Figure 12 - Air Output, Air Intake, and Lint Filters, 115T/165T Models
Fan
Flush
Air Intake
Filter
Filter End
Cover
Air Output
Filter
Air Intake Filter
Filter End Cover
Air Output
Filter
Fan Guard
Fan Guard
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