Desa 110 - Manual (Page 10)

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SERVICE
PROCEDURES
Air Output
Filter
Lint Filter
Air Intake
Filter
Filter End
Cover
Air Output
Filter
Lint Filter
Air Intake
Filter
Filter End
Cover
Fan
Guard
Figure 11 - Air Output, Air Intake,
and Lint Filters, 35/50/55/70,000
BTU/Hr Models Figure 12 - Air Output, Air Intake,
and Lint Filters, 100/110/150,000
BTU/Hr Models
WARNING !
Fan
Guard
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.
Upper
Shell
Fan Guard
Upper
Shell
Fan
Guard
Figure 7 - Upper Shell Removal,
35/50/55/70,000 BTU/Hr Models Figure 8 - Upper Shell Removal,
100/110/150,000 BTU/Hr Models
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. (35/50/55/70/100,000 BTU/Hr
Models) Replace fan on motor
shaft. Place fan hub flush with end
of motor shaft (see Figure 9).
(150,000 BTU/Hr Model) Replace
fan on motor shaft. Make sure set
screw is touching back of flat
surface on motor shaft (see Figure
10).
7. Place setscrew on flat of shaft.
Tighten setscrew firmly (40-50
inch-pounds).
8. Replace fan guard and upper shell.
Fan
Fan
Setscrew
Motor
Shaft
Motor
Flush
Motor
Shaft
Back of Flat
Surface on
Motor Shaft
Setscrew
Motor
Figure 9 - Fan Cross Section
35/50/55/70/100/110,000 BTU/Hr Models Figure 10 - Fan Cross Section
150,000 BTU/Hr Model
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 8).
6. Replace filter end cover.
7. Replace fan guard and upper shell.
IMPORTANT: Do not oil filters.