Desa BTU/HR Service Procedures, Upper Shell Removal, AIR OUTPUT, AIR Intake and Lint Filters, Fan

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SERVICE PROCEDURES

WARNING: To avoid risk of burn and electrical shock, never attempt to service heater while it is plugged in, operating, or hot.

UPPER SHELL REMOVAL

1.Remove screws along each side of heater using 5/16" nut-driver. These screws attach upper and lower shells together. See Figure 10 or 11.

2.Lift upper shell off.

3.Remove fan guard.

Screw

Upper Shell

 

Fan Guard

4.Clean fan using a 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 13).

7.Place setscrew on flat of shaft. Tighten setscrew firmly (40-50 inch-pounds/4.5-5.6 n-m).

8.Replace fan guard and upper shell.

Fan

Setscrew

Motor Shaft

Figure 12 - Fan, Motor Shaft, and

Setscrew Location

Motor Setscrew

Fan

 

Figure 10 - Upper Shell Removal,

40/50/55/60/70 Models Only

Screw

Upper Shell

Fan

Guard

Figure 11 - Upper Shell Removal, 110/115/155/165/200 Models Only

Flush

Motor

Shaft

Figure 13 - Fan Cross Section

AIR OUTPUT, AIR INTAKE AND LINT FILTERS

1.Remove upper shell (see Figure 10 or 11).

2.Remove filter end cover screws using 5/16" nut- driver (see Figure 14 or Figure 15, page 10).

3.Remove filter end cover.

4.Replace air output and lint filters.

5.Wash or replace air intake filter (see Preven- tative Maintenance Schedule, page 7).

FAN

IMPORTANT: Remove fan from motor shaft be- fore removing motor from heater. The weight of the motor resting on the fan could damage the fan pitch (see Figure 12).

1.

Remove upper shell (see Figure 10 or 11).

2.

Use 1/8" allen wrench to loosen setscrew

 

which holds fan to motor shaft.

Lint Filter

Air Intake Filter

Filter End

Cover

Air Output Filter

3. Slip fan off motor shaft.

Figure 14 - Air Output, Air Intake, and Lint Filters, 40/50/55/60/70 Models Only

113282-01C

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Contents Table of Contents Safety Information Unpacking Product IdentificationNever attach heater to external fuel tank Fuels VentilationTheory of Operation Operation AssemblyFor 110/115/155/165/200 Models only To Start HeaterOperation with Portable Generator Wthout ON/OFF SwitchStoring TRANSPORTING, or Shipping To Restart HeaterTroubleshooting Preventative Maintenance ScheduleFault Condition Possible Cause Remedy How Often How ToDirty fuel filter Ment,Obstruction in nozzle Water in fuel tankUpper Shell Removal Service ProceduresAIR OUTPUT, AIR Intake and Lint Filters FANPump Pressure Adjustment Fuel FilterReplace filter end cover Carefully remove replacement ignitor from packing IgnitorReplace combustion chamber Nozzle Assembly Place plastic hex-body into vise and lightly tightenFor 40/50/55/60/70/110/115/155/165 Models Only For 200 Model Only Fuel and AIR Line Replacement and Proper RoutingPump Rotor Procedure if Rotor is BindingIgnition Control Assembly SpecificationsModel Size 110/115 155 165 200Ignition Control Assembly Wiring DiagramsWiring Diagrams Standard Model Illustrated Parts BreakdownR40, REM40, PK40, UK40, TK40, N40 Thermostat ModelsModels Parts ListStandard Model NTC-4C 50/55/60/70 ModelsStandard Models WLE-2 110/115/155/165 ModelsRM200BT, B200BT, PK200T, UK200T, TK200T, REM200BT, R200BT R200B, PK200, UK200, TK200See NOZZLE/BURNER Head Assembly for 200 Models Burner Head Assembly for 110/115/155/165 ModelsFHPF3-5C Motor and Pump Assembly for 40/50/55/60/70 ModelsFHPF3-5C Motor and Pump Assembly for 110/115/155/165 ModelsMotor and Pump Assembly for 200 Models Wheels and Handle Parts List Replacement PartsParts Under Warranty Parts not Under WarrantyAccessories Technical ServiceLimited Warranty Warranty and Repair Service

BTU/HR specifications

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