Nozzle Assembly - Desa B155DST Manual De Propietario

SPARK IGNITOR
1. Remove upper shell and fan guard (See
Upper Shell Removal, page 10).
2. Remove fan (see page 10).
3. Remove electronic ignitor wire from spark
ignitor.
4. Remove spark ignitor from bracket using
1/4" nut driver.
5. Clean and regap spark ignitor electrodes
to 0.11" ± 0.01" gap (see Figure 14).
6. Install spark ignitor into bracket.
7. Attach electronic ignitor wire to spark
ignitor.
8. Replace fan (see page 10).
9. Replace fan guard and upper shell.
Figure 13 - Removing Spark Ignitor
Figure 14 - Ignitor Gap
12
SerVice prOcedureS
Continued
Nozzle
Adapter
Bracket
Spark
Ignitor
0.11"
± 0.01"
www.desatech.com

NOZZLE ASSEMBLY

1. Remove upper shell (see Upper Shell
Removal, page 10).
2. Remove fan (see page 10).
3. Remove fuel and air line hoses from
nozzle assembly (see Figure 15).
4. Turn nozzle assembly counterclockwise
and pull toward motor to remove (see
Figure 16).
5. Place plastic hex-body into vise and lightly
tighten.
6. Carefully remove nozzle from the nozzle
adapter using 5/8" socket wrench (see
Figure 17, page 13).
7. Blow compressed air through face of
nozzle. This will free any dirt in nozzle
area.
8. Inspect nozzle sleeve for damage.
9. Replace nozzle into nozzle adapter until
nozzle seats. Tighten 1/3 turn more using
5/8" socket wrench 4.5 to 5.1 N-m (40 to
45 in-lbs). See Figure 17, page 13.
10. Attach nozzle assembly to burner strap
(see Figure 16).
Combustion
Chamber
Nozzle
Adapter
Bracket
Air Line
Hose
Fuel
Line
Hose
Figure 15 - Removing Air and Fuel Line
Combustion
Chamber
Figure 16 - Removing Nozzle/Adapter
Assembly
Nozzle/
Adapter
Assembly
Photocell
Bracket
Nozzle/
Adapter
Assembly
122358-01A