110,000 Btu/Hr H.S.I. Series
PORTABLE FORCED AIR HEATER
SERVICE
PROCEDURES
Continued
WARNING: Never service heater while it is plugged in, oper- ating, or hot. Severe burns and electrical shock can occur.
FUEL FILTER
1.Remove side cover screws using 5/16"
2.Remove side cover.
3.Pull upper fuel line off fuel filter neck.
4.Carefully pry bushing, fuel filter, and lower fuel line out of fuel tank.
5.Wash fuel filter with clean fuel and re- place in tank.
6.Attach upper fuel line to fuel filter neck.
7.Replace side cover.
Fuel Filter, Bushing,
and Lower Fuel Line 
Upper Fuel Line
Side Cover
Figure 9 - Fuel Filter Removal
IGNITOR
1.Remove upper shell and fan guard (see page 7).
2.Remove fan (see page 7).
3.Remove 4 side cover screws with a 5/16" nut driver. Remove side cover (see Figure 9).
4.Disconnect ignitor wires (yellow) from ignition control assembly (see Figure 10). 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 10).
6.Remove combustion chamber. Stand combustion chamber on end with nozzle adapter bracket on top (see Figure 11).
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 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 11). 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 9).
13.Connect fuel line hose and air line hose to nozzle assembly. See Fuel and Air Line Replacement and Proper Routing, page 9.
14.Replace photocell in photocell bracket.
15.Replace fan (see page 7).
16.Replace fan guard and upper shell (see page 7).
Combustion | Nozzle | |
Chamber | Adapter | |
| Bracket | |
| Ignitor | |
Air | Ignitor | |
Line | Wires | |
Hose |
| |
Fuel |
| |
Line |
| |
Hose |
| |
Photocell | Ignition | |
Control | ||
Bracket | ||
Assembly | ||
Photocell | ||
| ||
Assembly |
| |
Side Cover |
|
Figure 10 - Disconnecting Ignitor Wires from Ignition Control Assembly
Ignitor Screw/Washer
Assembly
Ignitor | Ignitor | |
Element | Nozzle | |
Photocell | ||
Adapter | ||
Bracket | ||
Bracket | ||
|
|
| Nozzle Adapter | |
Combustion | |||
Bracket Opening | |||
Chamber | |||
| |||
Figure 11 - Ignitor Replacement
8 | 104192 |
