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" nut-driver. These screws attach upper and lower shells together.

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" 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 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 (40-50 inch-pounds).

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

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Desa B200 Service Procedures, Upper Shell Removal, Fan, AIR OUTPUT, AIR INTAKE, and Lint Filters, Pump Pressure Adjustment

REM200, B200, R200 specifications

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