Desa 20 - Manual (Page 15)

15
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Nozzle
(8,8 kW [30,000 Btu/Hr] Model)
1. Remove upper shell (see
page 10).
2. Remove fan (see page 19).
3. Remove fuel and air line
hoses from nozzle assem-
bly.
4. Turn nozzle assembly 1/4
turn to left and pull toward
motor to remove.
5. Place plastic hex-body into
vise and lightly tighten.
6. Carefully remove nozzle
from the nozzle adapter
using 5/8" socket wrench.
7. Blow compressed air thru
face of nozzle. This will
free any dirt in nozzle area.
8. Inspect nozzle seal for
damage.
9. Replace nozzle into nozzle
adapter until nozzle seats.
Tighten 1/3 turn more
using 5/8" socket wrench
(40-45 inch-pounds/4.5-
5.1 n-m).
10. Attach nozzle assembly to
burner strap.
11. Attach fuel and airline
hoses to nozzle assembly.
12. Replace fan (see page 19).
13. Replace fan guard and
upper shell.
Combustion
Chamber
Fuel Line Hose
Air Line Hose
Figure 24 - Removing Air and Fuel Line Hoses, 8,8 kW (30,000 Btu/Hr) Model
Nozzle
Assembly
Burner
Strap
Figure 25 - Removing Nozzle Assembly, 8,8 kW (30,000 Btu/Hr) Model
Figure 26 - Nozzle and Nozzle Adapter, 8,8 kW (30,000 Btu/Hr) Model
Air line
Fitting
Fuel line
Fitting
Nozzle
Face
Nozzle
Adapter
Nozzle
Assembly
Nozzle
Seal
Nozzle