Desa Air Conditioner Owner's Manual

Also see for 125-F: Service manual

Contents

Desa Air Conditioner Owner's Manual Manual pdf 8 page image

www.desatech.com 113893-01B8SERVICE PROCEDURESWARNING: Never serviceheater while it is plugged in,connected to propane supply,operating or hot. Severe burnsand electrical shock can occur.MOTOR1. With heater on its side, remove access panel.2. Access ground screw through underside ofheater base. Remove ground screw. Disconnectthe green motor wire and the green power cordwire from underside of shell (see Figure 5).3. Remove two black wires from motor to ter-minal board.4. Carefully push motor wires through hole inbottom of shell.5. Remove screws holding motor mount to shell.Use nut-driver (see Figure 5).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 weightresting on fan. This could damage fan pitch.7. Use hex wrench to loosen setscrew whichholds fan to motor shaft.8. Remove fan. Be careful not to damage the fanblade pitch.9. Use nut driver to remove two nuts that attachmotor 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 setscrew contacts flat surface on motor shaft.13. Tighten set screw firmly (40-50 inch-pounds[46.08-57.60 kilogram-centimeters]).14. Carefully route motor wires through hole inshell. Place motor, motor mount and fan guardinto rear of heater shell, as shown in Figure 5.15. Insert screws through heater shell and intomotor mount. Tighten screws firmly.16. Turn heater on its side to access opening inbottom of base. Connect green wires frommotor, transformer and power cord to heatershell using ground nut.17. Attach two black wires from motor to terminalboard (see Wiring Diagram, page 10, for cor-rect locations).18. Replace access panel.Figure 5 - Removing Motor and FanGuard from Heater (Heater may varyfrom illustration)ScrewScrewMotor andFan GuardFAN1. Remove motor, motor mount and fan (seeMotor, steps 1 through 8).2. Clean fan using soft cloth moistened withkerosene or solvent.3. Dry fan thoroughly.4. Replace fan on motor shaft. Make sure set-screw is touching back of flat surface on motorshaft (see Figure 6).5. Place setscrew on flat of shaft. Tighten set-screw firmly (40-50 inch-pounds [46.08-57.60kilogram-centimeters]).6. Place motor, motor mount and fan guardinto rear of heater shell (see Motor, steps 14through 18).Figure 6 - Fan, Motor Shaft and SetscrewLocationFigure 7 - Fan Cross SectionMotor ShaftFan SetscrewFanHubSetscrew MotorShaft