Filter
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SERVICE
PROCEDURES
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.
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 9).
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 8).
6. Replace filter end cover.
7. Replace fan guard and upper shell.
IMPORTANT: Do not oil filters.
WARNING
Never service heater while it is plugged in, operating, or
hot. Severe burns and electrical shock can occur.
Upper
Shell
/ Fan
j Guard
Upper
Shell
/
Fan
Guard
Figure 7 - Upper Shell Removal,
35/55, 000 Btu/Hr Models
Figure 8 - Upper Shell Removal,
110,000 Btu/Hr Model
/
Motor /
/
Shaft /
Setscrew
Flush
Figure 9 - Fan Cross Section
35/55/110,000 Btu/Hr Models
Air Intake
Filter
Filter End
Cover Fan
Guard
Air Intake
Filter
Filter End
Cover
Fan Guard
"_,,
Lint Filter '_,,,,,,,
Air Output
Filter
Figure 10 - Air Output, Air Intake,
and Lint Filters, 35/55,000
Btu/Hr Models
Lint Filter
Air Output
Filter
Figure 11 - Air Output, Air Intake,
and Lint Filters, 110,000 Btu/Hr
Model
100500