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12 116170-01A
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SERVICE PROCEDURES
Continued
IGNITOR
1. Remove upper shell and fan guard (See Upper
Shell Removal, page 10).
2. Remove fan (see page 10).
3. Remove 4 side cover screws with a 5/16" nut
driver. Remove side cover (see Figures 19 or
20, page 11).
4. Disconnect ignitor wires from ignition control
assembly (see Figure 21). Pull the ignitor
wires up through the hole in the lower shell.
5. Disconnect fuel line hose and air line hose.
Remove photocell from photocell bracket (see
Figure 21).
6. Remove combustion chamber. Stand com
-
bustion chamber on end with nozzle adapter
bracket on top (see Figure 22).
7. Remove ignitor screw with a 1/4" nut driver.
Carefully remove ignitor from nozzle adapter
bracket.
CAUTION: Do not bend or
strike ignitor element. Handle
with care.
8. Carefully remove replacement ignitor from
packing.
9. Carefully guide ignitor into opening in nozzle
adapter bracket. Do not strike ignitor element.
Attach ignitor to nozzle adapter bracket with
screw using a 1/4" nut driver (see Figure 23).
Torque .90 to 1.69 N-m (8 to 15 in-lbs) Do not
over torque.
10. Replace combustion chamber.
11. Route the ignitor wires back down through the
hole in the lower shell. Connect wires to the
ignition control assembly (see Figure 22).
12. Replace side cover (see Figures 19 or 20,
page 11).
13. Connect and route fuel line hose and air line
hose to nozzle adapter assembly. See Fuel and
Air Line Replacement and Proper Routing
,
page 14.
14. Replace photocell in photocell bracket. Route
wires as shown in either (see Figure 23 or
Figure 24, page 13).
15. Replace fan (see page 10).
16.
Replace fan guard and upper shell (see
page 10).
Photocell
Bracket
Ignitor
Ignitor Screw/
Washer Assembly
Nozzle
Adapter
Bracket
Ignitor
Element
Combustion
Chamber
Nozzle Adapter
Bracket Opening
Figure 22 - Ignitor Replacement
Figure 21 - Disconnecting Ignitor Wires
from Ignition Control Assembly
Photocell
Bracket
Air Line
Hose
Fuel
Line
Hose
Combustion
Chamber
Photocell
Assembly
Ignitor
Nozzle
Adapter
Bracket
Ignition
Control
Assembly
Side Cover
Ignitor
Wire
Figure 23 - Removing Air and Fuel Line
Hoses (40/55/70 Models Only)
Fuel Line Hose
Air Line
Hose
Nozzle/
Adapter
Assembly
Combustion
Chamber
Photocell
Bracket
Nozzle
Adapter
Bracket