OWNER’S MANUAL

SERVICE

PROCEDURES

Continued

IGNITOR

1.Remove upper shell and fan guard (see page 8).

2.Remove fan (see page 13).

3.Remove 4 side cover screws with a 5/16" nut driver. Remove side cover (see Figure 9 or 10, page 8).

4.Disconnect ignitor wires (gray) from ignition control assembly (see Figure 11). 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 11).

Combustion

Nozzle

Chamber

Adapter

 

Bracket

 

Ignitor

Air

Ignitor

Line

Wires

Hose

 

Fuel

 

Line

 

Hose

 

Photocell

Ignition

Control

Bracket

Assembly

Photocell

 

Assembly

 

Side Cover

 

Figure 11 - Disconnecting Ignitor Wires from Ignition Control Assembly

6.Remove combustion chamber. Stand combustion chamber on end with nozzle adapter bracket on top (see Fig- ure 12).

7.Remove ignitor screw with a 1/4" nut driver. Carefully remove ignitor from nozzle adapter bracket.

CAUTION:Donotbendorstrike ignitor element. Handle with care.

8.Carefully remove replacement ignitor from styrofoam packing.

9.Carefully guide ignitor into opening in nozzle adapter bracket. Do not strike ignitor element. Attach ignitor to nozzle adapter bracket with screw us- ing a 1/4" nut driver (see Figure 12). Torque 8 to 15 in. lbs. Do not over torque.

Ignitor Screw/Washer

Assembly

Ignitor

Ignitor

Element

Nozzle

Photocell

Adapter

Bracket

Bracket

 

Combustion

Nozzle Adapter

Bracket Opening

Chamber

 

Figure 12 - Ignitor Replacement

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.

12.Replace side cover (see Figure 9 or 10, page 8).

13.Connect and route fuel line hose and air line hose to burner head. See Fuel and Air Line Replacement and Proper Routing, page 11.

14.Replace photocell in photocell bracket. Route wires as shown in Fig- ures 17, 18, and 19 page 11.

15.Replace fan (see page 13).

16.Replace fan guard and upper shell (see page 8).

Continued

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Desa D20N, D44N, D30N owner manual Disconnecting Ignitor Wires from Ignition Control Assembly

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