R
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"
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).
Air Intake Filter
Filter End | Fan Guard |
Cover |
Lint Filter
Air Output
Filter
Figure 16 - Air Output, Air Intake, and Lint Filters, 35/70,000 Btu/Hr Models
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.
Air Intake Filter
Filter End | Fan Guard |
Cover |
|
Lint Filter
Air Output
Filter
Figure 17 - Air Output, Air Intake, and Lint Filters, 100/150,000 Btu/Hr Models
Pressure |
|
|
Gauge |
| Pump |
Plug |
| |
Relief |
| Pressure |
Model | (PSI/Bar) | |
Valve | 35,000 Btu/Hr | 2.9/0.200 |
| 70,000 Btu/Hr | 5.2/0.359 |
| 100,000 Btu/Hr | 3.9/0.269 |
| 150,000 Btu/Hr | 4.8/0.331 |
Figure 18 - Pressure Gauge Plug Removal
(35/70,000 Btu/Hr Models Shown)
Pressure
Gauge
Figure 19 - Adjusting Pump Pressure
10 | 103618 |