Dayton Operating Instructions and Parts Manual
Model 3VG79B
Maintenance (Continued)
4.Disconnect red and white wires from fuel valve (See Figure 11).
5.Using 1/4" nut driver remove 2 screws/ lockwashers holding fuel valve and bracket to lower shell (See Figure 11). Save these screws/lock washers.
6.Using 1/4" nut driver remove 2 screws holding fuel valve to bracket. Save these screws.
7.Attach new fuel valve to bracket with 2 screws.
8.Install new fuel valve and bracket on lower shell with 2 screws/lockwashers.
9.Connect red and white wires (polarity not important). Connect upper and lower fuel lines to fuel valve.
10.Replace fan, fan guard, upper shell, and side cover.
Bushing, Lower Fuel Line, and Fuel Filter 
Side | Fuel Valve | |
Fitting | ||
Cover | ||
|
Figure 10 - Fuel Filter Removal
| Valve | Lock Washer |
| Fittings | |
| Screw | |
Fuel Valve |
| |
|
| |
Electrical |
|
|
Wires |
|
|
Bracket
Screw
Lower Fuel
Line
Figure 11 - Fuel Valve Replacement
IGNITOR
1.Remove upper shell and fan guard (See Figure 5, page 5).
2.Remove fan (See pages 5 and 6).
3.Remove 4 side cover screws with a 5/16" nut driver. Remove side cover (See Figure 10).
4.Disconnect ignitor wires (black) 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 photo- cell bracket (See Figure 12).
6.Remove combustion chamber. Stand combustion chamber on end with nozzle adapter bracket on top (See Figure 13, page 8).
7.Remove ignitor screw with a 1/4" nut driver. Carefully remove ignitor from nozzle adapter bracket.
Do not bend or strike 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 using a 1/4" nut driver (See Figure 13, page 8). Torque 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.
12.Replace side cover (See Figure 10).
13.Connect and route fuel line hose and air line hose to nozzle assembly (See Figure 14, page 8).
14.Replace photocell in photocell bracket.
15.Replace fan (See pages 5 and 6).
16.Replace fan guard and upper shell (See pages 5 and 6).
Combustion | Nozzle | |
Adapter | ||
Chamber | ||
Bracket | ||
| ||
| Ignitor | |
Air | Ignitor | |
Line | Wires | |
Hose |
| |
Fuel |
| |
Line |
| |
Hose |
| |
Photocell | Ignition | |
Bracket | Control | |
Photocell | Assembly | |
Assembly |
|
Side Cover
Figure 12 - Disconnecting Ignitor Wires from Ignition Control Assembly
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7
Version B - For Reduction | G016.J |