8
103868
PROPANE CONSTRUCTION HEATER
50,000 BTU/HR
Ignitor
1.
Remove motor and fan guard from
heater (see Motor, page 7, steps 1
through 5).
2.
Remove black ignitor wire from piezo
ignitor. Access ignitor wire through un-
derside of heater base (see Figure 14).
Push wire up through bushing in heater
shell.
3.
Remove ignitor mounting screw from
rear head using nut-driver or standard
screwdriver (see Figure 15).
4.
Remove ignitor from rear head.
5.
Install new ignitor. Attach ignitor to rear
head with ignitor mounting screw.
6.
Run ignitor wire from new ignitor
through bushing in heater shell. Attach
ignitor wire to piezo ignitor.
7.
Set gap between ignitor electrode and
target plate to .17" (see Figure 16).
Rear
Head
Figure 15 - Removing Ignitor Mounting
Screw and Ignitor
Figure 14 - Removing Ignitor Wire from
Piezo Ignitor
Bushing
Piezo
Ignitor
Underside of Heater Base
Ignitor Wire
Ignitor
Target Plate
Gap
Area
Figure 16 - Clearance between Ignitor
Electrode and Target Plate
Ignitor
Electrode
Ignitor
Mounting
Screw
Fan Nut
Figure 12 - Removing Fan Nut from Motor
Shaft
Figure 11 - Removing Motor and Fan
Guard from Heater
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 11).
3.
Use pliers to remove the fan nut from
front of motor shaft (see Figure 12).
4a. If replacing fan, remove old fan and
discard. Go to step 7 below.
4b. If cleaning fan, remove fan. Be careful
not to damage the fan blade pitch.
5.
Clean fan using soft cloth moistened
with kerosene or solvent.
6.
Dry fan thoroughly.
7.
Place fan onto motor shaft.
IMPORTANT:
When placing fan onto
motor shaft, make sure part number
stamped on fan is facing motor.
8.
Attach fan nut to end of motor shaft.
Tighten fan nut firmly.
9.
Place motor and fan guard into rear of
heater shell. Make sure power cord is
properly located (see Figure 13).
10. Insert three screws through heater shell
and into fan guard. Tighten screws
firmly.
SERVICE
PROCEDURES
Continued
WARNING: Make sure heater
is disconnected from propane
supply. Heater could ignite caus-
ing severe burns.
8.
Test for spark. Push piezo ignitor but-
ton and watch for spark between igni-
tor electrode and target plate.
9.
Place motor and fan guard into rear of
heater shell (see Motor, page 7, steps 9
through 10).
