www.desatech.com
121232-01A
9
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.kg-cm]).
6.. Place.motor,.motor.mount..and.fan.guard.
into.rear.of.heater.shell.(see.
Motor
,.steps.
14.through.18,.page.8).
Motor.Shaft
Fan
Setscrew
Figure 6 - Fan, Motor Shaft and
Setscrew Location
Figure 7 - Fan Cross Section
Fan
Hub
Setscrew
Motor.
Shaft
serViCe ProCedures
Continued
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.
Figure 9 - Removing Spark Plug Nut and
Spark Plug (Heater may vary from illustration)
Rear.Head
Spark.Plug
3/4".Hex.
Nut
SPARK PLUG
1.. Remove.motor,.motor.mount..and.fan.guard.
(see.
Motor
,.page.8,.steps.1.through.6).
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).
Figure 8 - Removing Spark Plug Wire
from Spark Transformer (Heater may
vary from illustration)
Bushing
Spark.Plug.
Wire