114278-01C
12
SERVICE PROCEDURES
Continued
NOZZLE ASSEMBLY
1. Remove upper shell (see
Upper Shell Re-
moval
, page 9).
2. Remove fan (see
Fan
, page 9).
3. Remove fuel and air line hoses from nozzle
assembly (see Figure 20 or 21).
4. Turn nozzle assembly 1/4 turn to left and pull
toward motor to remove (see Figure 22).
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 23).
7. Blow compressed air through face of nozzle.
This will free any dirt in nozzle area.
8. Inspect nozzle sleeve for damage.
Nozzle/
Adapter
Assembly
Combustion
Chamber
Air Line
Hose
Figure 20 - Removing Air and Fuel Line
Hoses (70,000 Btu Model Only)
Fuel Line Hose
Air Line
Hose
Nozzle
Adapter
Bracket
Nozzle/
Adapter
Assembly
Combustion
Chamber
Photocell
Bracket
Nozzle
Adapter
Bracket
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 23.
10. Attach nozzle assembly to burner strap (see
Figure 22).
11. Attach fuel and airline hoses to nozzle as-
sembly. See
Fuel and Airline Replacement
and Proper Routing
, page 13.
12. Replace fan (see
Fan
, page 9).
13. Replace fan guard and upper shell (see
Upper
Shell Removal
, page 9).
Figure 21 - Removing Air and Fuel Line
Hoses (165,000 Model Only)
Fuel
Line
Hose
Photocell
Bracket
Figure 22 - Removing Nozzle/Adapter
Assembly
Nozzle/
Adapter
Assembly
Combustion
Chamber
Figure 23 - Nozzle and Nozzle Adapter
Nozzle Face
Nozzle
Nozzle Sleeve
Nozzle Adapter
Air Line
Fitting
Fuel Line Fitting
