Desa 70 - Manual (Page 16)

16
099606
Nozzle
(70/90,000 BTU/Hr Models)
1. Remove upper shell (see
page 10).
2. Remove fan (see page 19).
3. Remove fuel and air line
hoses from burner head.
4. Remove spark plug wire
from spark plug.
5. Remove spark plug from
burner head using 13/16"
open-end wrench.
6. Remove three screws
using 5/16" nut-driver and
remove burner head from
combustion chamber.
7. Place burner head into vise
and lightly tighten.
8. Carefully remove nozzle
from burner head using
5/8" socket wrench (see
Figure 28).
9. Blow compressed air thru
face of nozzle. This will
free any dirt in nozzle area.
10. Inspect nozzle seal for
damage.
11. Replace nozzle into burner
head and tighten firmly
(80-110 inch-pounds/9.1-
12.4 n-m).
12. Attach burner head to
combustion chamber.
13. Install spark plug in burner
head.
14. Attach spark plug wire to
spark plug.
15. Attach fuel and airline
hoses to burner head.
16. Replace fan (see page 19).
17. Replace fan guard and
upper shell.
Figure 27 - Removing Burner Head, 70/90,000 BTU/Hr Models
Spark
Plug
Combustion
Chamber
Burner Head
Air Line Hose
Fuel Line Hose
Screw
Spark Plug
Wire
Figure 28 - Removing Nozzle, 70/90,000 BTU/Hr Models
Nozzle
Face
Nozzle
Burner
Head
Air line
Fitting
Fuel line
Fitting
Nozzle
Seal