OWNER’S MANUAL
SERVICE
PROCEDURES
WARNING: Never service heater while it is plugged in, op- erating, or hot. Severe burns and electrical shock can occur.
UPPER SHELL REMOVAL
1.Remove screws along each side of heater using 5/16"
2.Lift upper shell off.
3.Remove fan guard.
Upper Shell
Fan
Guard
Figure 5 - Upper Shell Removal
FAN
IMPORTANT: Remove fan from motor shaft before removing motor from heater. The weight of the motor resting on the fan could damage the fan pitch.
1.Remove upper shell (see above).
2.Use 1/8" allen wrench to loosen set- screw which holds fan to motor shaft.
3.Slip fan off motor shaft.
4.Clean fan using soft cloth moistened with kerosene or solvent.
5.Dry fan thoroughly.
6.Replace fan on motor shaft. Place fan hub flush with end of motor shaft (see Figure 6).
7.Place setscrew on flat of shaft. Tighten setscrew firmly
8.Replace fan guard and upper shell.
Fan 
Motor
Flush
Motor
Shaft
Setscrew
Figure 6 - Fan Cross Section
AIR OUTPUT, AIR INTAKE, AND LINT FILTERS
1.Remove upper shell (see above).
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 5).
6.Replace filter end cover.
7.Replace fan guard and upper shell.
IMPORTANT: Do not oil filters.
Air Intake Filter
Filter End Cover
Fan Guard
Lint Filter
Air Output Filter
Figure 7 - Air Output, Air Intake, and Lint 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 4). 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 pres- sure for each model.
5.Remove pressure gauge. Replace pres- sure gauge plug in filter end cover.
Relief
Valve
Pressure
Gauge
Plug
Figure 8 - Pressure Gauge Plug Removal
| Pump |
Model | Pressure |
150,000 Btu/Hr | 4.8 PSI (.331 bar) |
Pressure
Gauge
Figure 9 - Adjusting Pump Pressure
104001 | 7 |
