200,000 Btu/Hr
PORTABLE FORCED AIR HEATER
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 Screw
ShellFan
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.
Fan
Motor
Flush
Motor
Shaft
Setscrew
Figure 6 - Fan Cross Section
AIR OUTPUT, AIR INTAKE, AND LINT FILTERS
1.Remove upper shell (see Upper Shell Removal).
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 (see Figure 8).
2.Install accessory pressure gauge (part number HA1180).
3.Start heater (see Operation, page 5). Al- low motor to reach full speed.
4.Adjust pressure to 6.0 PSI. Turn relief valve to right to increase pressure. Turn relief valve to left to decrease pressure. See Figure 9.
5.Stop heater. Remove pressure gauge. Replace pressure gauge plug in filter end cover.
Relief Valve
Pressure
Gauge Plug
Figure 8 - Pressure Gauge Plug Removal
Pressure
Gauge
1.Remove upper shell (see Upper Shell Removal, 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.
Air Intake | Fan Guard |
Filter |
Filter End
Cover
Figure 9 - Adjusting Pump Pressure
Lint
Filter
Air Output
Filter
Figure 7 - Air Output, Air Intake, and Lint
Filters
8 | 102569 |
