Master Lock 70000 BTU/Hr - Manual (Page 12)

12
101585
Air Output, Air Intake,
and Lint Filters
1. Remove upper shell (see
page 10).
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.
Air Intake Filter
Lint Filter
Filter End
Cover
Air Output
Filter
Fan Guard
Figure 14 - Air Output, Air Intake, and Lint Filters,
70,000 BTU/Hr Model
Air Intake Filter
Filter End
Cover
Lint Filter
Air Output
Filter
Figure 15 - Air Output, Air Intake, and Lint Filters,
100,000/150,000 BTU/Hr Models
PRESSURE GAUGE PLUG PFA/OV 006B Figure 16 - Pressure Gauge Plug Removal
Pressure
Gauge
Plug
Pressure
Gauge
Figure 17 - Adjusting Pump Pressure
Pump
Model Pressure
70,000 BTU/Hr 4.5 PSI
100,000 BTU/Hr 4.5 PSI
150,000 BTU/Hr 4.9 PSI
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 7). 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 at right
for correct pressure for
each model.
5. Remove pressure gauge.
Replace pressure gauge
plug in filter end cover.
(70,000 BTU/Hr Model Shown)
Relief
Valve
Fan Guard