Desa RH125TH Owner's Manual page 10

SERVICE PROCEDURES
10
SERVICE PROCEDURES
Continued
IGNITOR
1. Remove upper shell (See Upper Shell Removal, page 8).
2. Remove fan (see page 8).
3. Remove 2 control cover screws with a phillips screwdriver.
Remove control cover (see Figure 11, page 9).
4. Disconnect ignitor wires from ignition control assembly (see
Figure 12). 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 12).
6. Remove combustion chamber. Stand combustion chamber on
end with nozzle adapter bracket on top (see Figure 13).
7. Remove ignitor screw with a 5/16" nut driver. Carefully re-
move ignitor from nozzle adapter bracket.
8. Carefully remove replacement ignitor from packing.
CAUTION: Do not bend or strike ignitor element.
Handle with care.
Combustion
Chamber
Air Line Hose
Fuel Line Hose
Photocell
Bracket
Photocell
Assembly
Control Cover
Figure 12 - Disconnecting Ignitor Wires from Ignition Control
Assembly
Nozzle Adapter
Bracket
Ignitor
Ignitor Wire
Ignition
Control
Assembly
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For more information, visit www.desatech.com
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 5/16" nut driver (see Figure 13).
Torque 8 to 15 in-lbs (.90 to 1.69 N-m) 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 Fig-
ure 12).
12. Replace control cover (see Figure 11, page 9).
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 11.
14. Replace photocell in photocell bracket. Route wires as shown
in either Figure 14, page 11.
15. Replace fan (see page 8).
16. Replace upper shell (see page 8).
Ignitor Element
Photocell
Bracket
Combustion
Nozzle Adapter
Chamber
Bracket Opening
Figure 13 - Ignitor Replacement
Ignitor
Nozzle Adapter
Bracket
112865-01A