Filter
Top Products
10
105787
PORTABLE FORCED AIR HEATERS
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 and plas-
tic cap (35/50/70,000 Btu/Hr Models
only) 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 and plastic cap (35/50/
70,000 Btu/Hr Models only) in filter
end cover.
Figure 13 - Air Output, Air Intake, and Lint Filters, 35/50/70,000 Btu/Hr Models
Figure 15 - Pressure Gauge Plug and
Plastic Cap Removal
Pressure
Gauge
Plug
Pressure
Gauge
Figure 16 - Adjusting Pump Pressure
Pump
Pressure
Model (PSI/Bar)
NTH35-2 2.9/0.200
NTH50-2 3.9/0.270
NTH70-2 4.9/0.338
NTH100-2 4.9/0.338
NTH150-2 5.5/0.380
(35/50/70,000 Btu/Hr Models Shown)
Relief
Valve
SERVICE
PROCEDURES
Continued
Air Intake Filter
Lint Filter
Filter End
Cover
Air Output
Filter
Fan Guard
Air Intake Filter
Filter End
Cover
Lint Filter
Air Output
Filter
Figure 14 - Air Output, Air Intake, and Lint Filters, 100/150,000 Btu/Hr Models
Fan Guard
Plastic Cap