Owner's Manual

www.desatech.com
111656-01E
8
Figure 11 - Removing or Attaching Fan
Guard from Motor
Figure 12 - Replacing Motor and Fan
Guard Into Heater
Fan Guard
Motor
Nut
Screw
Screw
Motor and
Fan Guard
Screw
Screw
SERVICE PROCEDURES
Continued
5 Disconnect the green power cord wire from
motor and remove black and white wire ter
-
minals.
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 [46.08-57.60 kg-cm]).
11. Place motor and fan guard into rear of heater
shell. Make sure power cord is properly lo
-
cated (see Figure 12).
12. Insert three screws through heater shell and
into fan guard (see Figure 12). Tighten screws
firmly.
Figure 14 - Removing Ignitor Mounting
Screw and Ignitor
Figure 13 - Removing Ignitor Wire from
Piezo Ignitor
Ignitor
Mounting
Screw
Ignitor Wire
Piezo
Ignitor
Underside
of Heater
FAN
1. Remove three screws that attach fan guard to
heater shell.
2. Remove motor and fan guard from heater shell
(see Figure 9, page 7).
3. Use hex wrench to loosen set screw that holds
fan to motor shaft (see Figure 10, page 7).
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 surface on motor shaft.
Tighten set screw firmly (40-50 inch-pounds
[46.08-57.60 kilogram-centimeters]).
8. Place motor and fan guard into rear of heater
shell. Make sure power cord is properly lo
-
cated (see Figure 12).
9. Insert three screws through heater shell and
into fan guard. Tighten screws firmly.
IGNITOR
1. Remove motor and fan guard from heater (see
Motor, page 7, steps 1 and 2).
2. Remove black ignitor wire from piezo ignitor.
Access ignitor wire through underside of
heater base (see Figure 13). Push wire up
through notch in filler panel.
3. Remove ignitor mounting screw from rear
head using nut-driver or standard screwdriver
(see Figure 14).