www.desatech.com
121231-01B
9
Figure 6 - Fan, Motor Shaft and Setscrew
Location
Figure 7 - Fan Cross Section
serViCe ProCedures
Continued
Figure 8 - Removing Spark Plug Wire
from Spark Transformer (Heater may
vary from illustration)
Bushing
Spark
Plug
Wire
FAN
1. Remove motor, motor mount and fan (see
Motor
, steps 1 through 8, page 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 6).
5. Place setscrew on flat of shaft. Tighten
setscrew firmly (40-50 inch-pounds
[46.08-57.60 kilogram-centimeters]).
6. Place motor, motor mount and fan guard
into rear of heater shell (see
Motor
, steps
14 through 18, page 8).
Figure 9 - Removing Spark Plug Nut and
Spark Plug (Heater may vary from illustration)
Rear Head
Spark Plug
3/4" Hex
Head Nut
SPARK PLUG
1. Remove motor, motor mount and fan guard
(see
Motor
, steps 1 through 6, page 8).
2. Remove orange spark plug wire from
spark plug.
3. From front of heater loosen 3/4" hex nut
holding spark plug in place (see Figure 9).
4. Remove spark plug from rear head.
5. Install new spark plug. Attach spark plug
to rear head with ignitor hex nut removed
in step 3.
6. Attach spark plug wire.
7. Test for spark.
WARNING: Make sure heater
is disconnected from propane
supply. Heater could ignite caus-
ing severe burns.
Plug into extension cord and watch for
spark at spark plug.
8. Place motor, motor mount and fan guard
into rear of heater shell (see
Motor
, steps
14 through 18, page 8).
Motor Shaft
Fan
Setscrew
Fan
Hub
Setscrew
Motor Shaft
SPARK TRANSFORMER
1. Remove access panel.
2. Locate and disconnect white, black and
orange wires from spark transformer.
3. Remove screw holding spark transformer
to base. Remove sheet metal nut on trans-
former and install on new transformer.
Discard spark transformer.
4. Install new spark transformer. Position
new spark transformer in same manner
as old transformer.
5. Connect white, black and orange wires
to new spark transformer. Connect wires
to correct terminals as noted in
Wiring
Diagram
, page 10.
6. Replace access panel.
