Filter
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Service
20 Operator’s Manual
AIR OUTPUT, AIR INTAKE AND LINT FILTERS:
1. Remove upper shell. (Fig. 4 or 5)
2.
Remove filter end cover screws using 5/16" nut-driver.
(Fig. 8 or 9)
3. Remove filter end cover.
4. Replace air output and lint filters.
5. Wash or replace air intake filter (see "Preventative
Maintenance Schedule").
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
(Fig. 10).
2. Install a pressure gauge.
3. Start space heater (See "Operation"). 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
(Fig. 11). See specifications below for correct pressure
for each model.
Model: Pump Pressure:
70 4.7 PSI
115 5.1 PSI
165 5.6 PSI
5. Remove pressure gauge. Replace pressure gauge plug
in filter end cover.
MAINTENANCE (CONTINUED):
(Fig. 9)
Air Intake Filter
Lint Filter
Filter End
Cover
Air Output Filter
Model: AC-70
Air Intake Filter
Filter
End
Cover
Lint Filter
Air Output Filter
Models: AC-115 / 165
(Fig. 8)
Pressure
Gauge
Plug
Relief
Valve
Model: AC-70 Shown
(Fig. 10)
Pressure
Gauge
Model: AC-70 Shown
(Fig. 11)