Service Procedures - Desa 30000 Btu/Hr Manual Del Proprietário

SERVICE PROCEDURES

8
SERVICE PROCEDURES
WARNING: Never service heater while it is plugged
in, connected to propane supply, operating, or hot.
Severe burns and electrical shock can occur.
ELECTRICAL SYSTEM
The entire electrical system for this heater is contained within the
motor. If any part of the electrical system is damaged, you must
replace motor.
MOTOR
1. Remove three screws that attach fan guard to heater shell.
2. Remove motor and fan guard from heater shell (see Figure 10).
3. Use hex wrench to loosen set screw which holds fan to motor
shaft (see Figure 11). Remove fan. Be careful not to damage
the fan blade pitch.
4. Remove two nuts and two screws that attach fan guard to motor
using nut-driver. Remove fan guard from motor (see Figure 12).
5 Disconnect the green power cord wire from motor and remove
black and white wire terminals.
6. Discard old motor.
7. Attach green power cord wire to motor.
8. Attach fan guard to new motor with two nuts and two screws.
9. Replace black and white terminals.
10. Place fan onto motor shaft of new motor. Make sure set screw
contacts flat surface on motor shaft. Tighten set screw firmly
(40-50 inch-pounds [46,08 a 57,60 kgf/cm]).
11. Place motor and fan guard into rear of heater shell. Make sure
power cord is properly located (see Figure 13).
12. Insert three screws through heater shell and into fan guard.
Tighten screws firmly.
Figure 10 - Removing Motor and Fan Guard from Heater
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For more information, visit www.desatech.com
Setscrew
Figure 11 - Setscrew Location
Figure 13 - Replacing Motor and Fan Guard into Heater
FAN
1. Remove three screws that attach fan guard to heater shell.
2. Remove motor and fan guard from heater shell (see Figure 10).
3. Use hex wrench to loosen set screw that holds fan to motor
shaft (see Figure 11).
4. Remove fan. Be careful not to damage the fan blade pitch.
5a. If replacing fan, remove old fan and discard. Go to step 7 below.
5b. If cleaning fan,use soft cloth moistened with kerosene or solvent.
6. Dry fan thoroughly.
7. Place fan onto motor shaft. Make sure set screw contacts flat sur-
face on motor shaft. Tighten set screw firmly (40-50 inch-pounds
[46,08 a 57,60 kgf/cm]).
8. Place motor and fan guard into rear of heater shell. Make sure
power cord is properly located (see Figure 13).
9. Insert three screws through heater shell and into fan guard.
Tighten screws firmly.
Figure 12 - Removing or
Attaching Fan Guard from Motor
111708-01A