70,000 Btu/Hr H.S.I. Series
PORTABLE FORCED AIR HEATERS
SERVICE PROCEDURES
Continued
WARNING: Never service heater while it is plugged in, op- erating, or hot. Severe burns and electrical shock can occur.
FUEL FILTER
6.Remove combustion chamber. Stand combustion chamber on end with nozzle adapter bracket on top (see Fig- ure 10).
7.Remove ignitor screw with a 1/4" nut driver. Carefully remove ignitor from nozzle adapter bracket.
CAUTION:Donotbendorstrike ignitor element. Handle with care.
Photocell Bracket
Ignitor Element
Ignitor Screw/
Washer
Assembly
Ignitor
Nozzle Adapter Bracket
1.Remove 4 side cover screws using 5/16"
2.Remove side cover.
3.Pull upper fuel line off fuel filter neck.
4.Carefully pry bushing and fuel filter 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
8.Carefully remove replacement ignitor from styrofoam packing.
9.Carefully guide ignitor into opening in nozzle adapter bracket. Do not strike ig- nitor element. Attach ignitor to nozzle adapter bracket with screw using a 1/4" nut driver (see Figure 10). 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 8).
13.Connect and route fuel line hose and air line hose to nozzle adapter (see Figure 9).
14.Replace photocell in photocell bracket. Route wires as shown in Figure 12, page 9.
15.Replace fan (see page 7).
16.Replace fan guard and upper shell (see page 7).
Combustion | Nozzle Adapter |
Chamber | Bracket Opening |
Figure 10 - Ignitor Replacement
IGNITION CONTROL
ASSEMBLY
(Procedure for Replacing Fuse)
WARNING: High Voltage
1. | Unplug heater |
2. | Remove side cover screws (4) using |
| 5/16" |
| trol assembly. |
3. | Remove fuse cover. |
4. | Remove fuse from fuse clips. |
5. | Replace fuse with fuse of the same type |
| and rating |
Side Cover | Upper Fuel Line |
Figure 8 - 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 |
Combustion Chamber
Air Line
Hose
Fuel
Line
Hose
Nozzle Adapter Bracket
Ignitor
Ignitor
Wires
| tute a fuse with a higher current rating. |
6. | Replace fuse cover. |
7. | Replace side cover. |
Fuse | Fuse | |
Clips | ||
Cover | ||
| ||
| Fuse |
| (see Figure 8). |
4. | Disconnect ignitor wires (yellow) from |
| ignition control assembly (see Figure |
| 9). 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 9). |
Photocell | Ignition | |
Bracket | ||
Control | ||
| ||
Photocell | Assembly | |
| ||
Assembly |
| |
Side Cover |
|
Figure 9 - Disconnecting Ignitor Wires from Ignition Control Assembly
Figure 11 - Replacing Fuse
8 | 103685 |
