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
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).
Combustion | Nozzle | |
Adapter | ||
Chamber | ||
Bracket | ||
| ||
Air Line | Ignitor | |
Hose | ||
| ||
Fuel |
| |
Line | Ignitor | |
Hose | ||
Wire | ||
| ||
Photocell |
| |
Bracket | Ignition | |
| ||
Photocell | Control | |
Assembly | ||
Assembly | ||
| ||
Side Cover |
| |
Figure 21 - Disconnecting Ignitor Wires | ||
from Ignition Control Assembly | ||
Ignitor Screw/ |
| |
Washer Assembly |
| |
| Ignitor | |
Ignitor | Nozzle | |
Element | ||
Photocell | Adapter | |
Bracket | Bracket | |
Combustion | Nozzle Adapter | |
Chamber | ||
Bracket Opening | ||
| ||
Figure 22 - Ignitor Replacement | ||
Combustion |
| |
Chamber |
| |
Nozzle |
| |
Adapter |
| |
Bracket | Nozzle/ | |
| ||
Photocell | Adapter | |
Assembly | ||
Bracket | ||
| ||
Air Line | Fuel Line Hose | |
Hose | ||
| ||
Figure 23 - Removing Air and Fuel Line | ||
Hoses (40/55/70 Models Only) | ||
12 | www.desatech.com |
