Desa RM60 Service Procedures, Upper Shell Removal, Fan, AIR OUTPUT, AIR INTAKE, and Lint Filters

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60,000 Btu/Hr H.S.I. Series

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

Shell

Fan

Guard

Figure 3 - Upper Shell Removal

FAN

Fan

Motor

Flush

Motor

Shaft

Setscrew

Figure 4 - 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 4).

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 4). Allow motor to reach full speed.

4.Using a flat blade screwdriver, adjust pressure. Turn relief valve to right to increase the pressure. Turn relief valve to left to decrease the pressure. Set pump pressure to 3.4 psi.

5.Stop heater (see Operation, page 4).

6.Remove pressure gauge. Replace pres- sure gauge plug in filter end cover.

Pressure

Gauge

PlugRelief

Valve

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 4).

7.Place setscrew on flat of shaft. Tighten setscrew firmly (40-50 inch-pounds).

8.Replace fan guard and upper shell.

Air Intake Filter

Figure 6 - Pressure Gauge Plug Removal

Filter End Cover

 

Fan Guard

 

 

Pressure

 

Gauge

Lint Filter

 

Air Output Filter

 

Figure 5 - Air Output, Air Intake, and Lint

Filters

Figure 7 - Adjusting Pump Pressure

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Contents Portable Forced AIR Heater Fueling Safety InformationUnpacking Fueling of heating unitsProduct Identification Fuels Theory of OperationVentilation Preventative Maintenance Schedule OperationStoring TRANSPORTING, or Shipping Dirty fuel filter TroubleshootingWater in fuel tank Drain and flush fuel tank with clean Obstruction in nozzleUpper Shell Removal Service ProceduresPump Pressure Adjustment FANCarefully remove replacement ignitor from styrofoam packing Fuel FilterIgnitor Nozzle Assembly Pump RotorReplacement Parts SpecificationsTechnical Service Parts Under WarrantyWiring Diagrams Ignition Control AssemblyAccessories Illustrated Parts Breakdown RM60Parts List Number Description QTYWarranty and Repair Service Limited Warranty

RM60 specifications

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