Desa RM100LP owner manual Service Procedures, Motor, Fan

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OWNER’S MANUAL

SERVICE

PROCEDURES

WARNING: Never service heater while it is plugged in, con- nected to propane supply, oper- ating, or hot. Severe burns and electrical shock can occur.

MOTOR

1.While on heaters side Remove base tray.

2.Access ground screw through underside of heater base. Remove ground screw. Disconnect the green motor wire and the green power cord wire from underside of shell (see Figure 5).

3.Remove black and white motor wires from terminal board (see Figure 5).

4.Carefully push motor wires through hole in bottom of shell.

5.Remove screws holding motor mount to shell. Use nut-driver (see Figure 6).

 

 

Transformer

 

Ground

Green Lead

 

 

 

Screw

 

Motor

 

Power

 

Cord

Green

 

 

Green

Lead

 

 

Lead

 

 

Terminal

Board

Figure 5 - Location of Ground Screw

Motor

 

Mount

 

Screw

Fan

 

 

Guard

Hole in

Motor

Mount

Shell

 

for Wires

 

Figure 6 - Removing Motor, Motor Mount, and Fan Guard from Heater

6.Carefully pull motor and fan out of shell.

IMPORTANT: Be careful not to damage fan. Do not set motor and fan down with the weight resting on fan. This could damage fan pitch.

7.Use hex wrench to loosen setscrew which holds fan to motor shaft.

8.Remove fan. Be careful not to damage the fan blade pitch.

9.Use nut driver to remove two nuts that attach motor to motor mount.

10.Discard old motor.

11.Attach motor to motor mount with two nuts. Tighten nuts firmly.

12.Replace fan on motor shaft. Make sure set screw contacts flat surface on motor shaft.

13.Tighten set screw firmly (40-50 inch- pounds).

14.Carefully route motor wires through hole in shell (see Figure 7). Place motor, motor mount, and fan guard into rear of heater shell.

15.Insert screws through heater shell and into motor mount. Tighten screws firmly.

16.Turn heater on its side to access opening in bottom of base. Connect green wires from motor, transformer, and power cord to heater shell using ground nut (see Figure 5).

17.Attach black and white wires to terminal board (see Wiring Diagram, page 9, for correct locations) .

18.Replace base tray.

Hole in

Shell

Figure 7 - Replacing Motor, Motor Mount, and Fan Guard into Heater

FAN

1Remove motor, motor mount, and fan (see Motor, steps 1 through 8) .

2.Clean fan using soft cloth moistened with kerosene or solvent.

3.Dry fan thoroughly.

4.Replace fan on motor shaft. Make sure setscrew is touching back of flat surface on motor shaft (see Figure 8).

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

6.Place motor, motor mount, and fan guard into rear of heater shell (see Motor, steps 14 through 18).

Fan

Setscrew

Motor shaft

FAN

LP-PFA/P 023

Figure 8 - Fan, Motor Shaft, and Setscrew Location

Fan

Hub

Motor

Setscrew

FAN CROSS SECTION

LP-PFA/P 013

Figure 9 - Fan Cross Section

Continued

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Contents Propane Construction Heaters Propane Construction Heater Safety InformationUnpacking Product IdentificationTheory Operation Propane Supply InstallationVentilation To Stop Heater MaintenanceStorage To Start HeaterObserved Fault Possible Cause Remedy TroubleshootingMotor Service ProceduresFAN Ignitor AccessoriesTechnical Service Spark TransformerReplacement Parts SpecificationsWiring Diagram Illustrated Parts Breakdown KEY Part Number Description QTY Parts ListRepair Service Warranty and Repair ServiceKeep this Warranty Limited Warranty Warranty Service

RM100LP specifications

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