Desa D20H Owner's Manual page 10

D20H, D30H AND D44H MODELS
PORTABLE FORCED AIR HEATERS
SERVICE
PROCEDURES
Continued
AIR OUTPUT, AIR INTAKE,
AND LINT FILTERS
1. Remove upper shell (see page 8).
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 6).
6. Replace filter end cover.
7. Replace fan guard and upper shell.
IMPORTANT: Do not oil filters
PUMP PRESSURE
ADJUSTMENT
1. Remove pressure gauge plug from filter
end cover.
2. Install accessory pressure gauge (part
number HA1180).
3. Start heater (see Operation, page 5).
Allow motor to reach full speed.
4. Adjust pressure. Turn relief valve to
right to increase pressure. Turn relief
valve to left to decrease pressure. See
specifications below for correct pres-
sure for each model.
5. Remove pressure gauge. Replace pres-
sure gauge plug in filter end cover.
Lint Filter
Figure 13 - Air Output, Air Intake, and Lint Filters, D20H Model
Lint Filter
Figure 14 - Air Output, Air Intake, and Lint Filters, D30H and D44H Models
Pressure
Gauge
Plug
Figure 15 - Pressure Gauge Plug Removal
(D20H Model Shown)
10
Air Intake Filter
Filter End
Cover
Air Output
Filter
Air Intake Filter
Filter End
Cover
Air Output
Filter
Relief
Model
Valve
D20H
D30H
D44H
Pressure
Gauge
Figure 16 - Adjusting Pump Pressure
Fan Guard
Fan Guard
Pump
Pressure
(PSI/Bar)
4.7/0.324
4.9/0.338
5.5/0.380
105843