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"
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.
Air Intake Filter
Filter End | Fan Guard |
Cover |
Lint Filter
Air Output
Filter
Figure 13 - Air Output, Air Intake, and Lint Filters, D20H Model
Air Intake Filter
Filter End | Fan Guard |
Cover |
|
Lint Filter
Air Output
Filter
Figure 14 - Air Output, Air Intake, and Lint Filters, D30H and D44H Models
Pressure |
|
|
Gauge |
| Pump |
Plug |
| |
Relief |
| Pressure |
Model | (PSI/Bar) | |
Valve | D20H | 4.7/0.324 |
| ||
| D30H | 4.9/0.338 |
| D44H | 5.5/0.380 |
Figure 15 - Pressure Gauge Plug Removal
(D20H Model Shown)
Pressure
Gauge
Figure 16 - Adjusting Pump Pressure
10 | 105843 |
