Nozzle Assembly - Desa H.S.I. Serie Manual Del Propietário

SERVICE PROCEDURES
Continued

NOZZLE ASSEMBLY

(For 40/55/60/70/110/115/155/165 Models Only)
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 21 or 22, page 12).
4. Turn nozzle assembly 1/4 turn to left and pull
toward motor to remove (see Figure 23).
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 24).
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 24.
10. Attach nozzle assembly to burner strap (see
Figure 23).
11. Attach fuel and airline hoses to nozzle assem-
bly. See Fuel and Airline Replacement and
Proper Routing, page 14.
12. Replace fan (see Fan, page 9).
13. Replace fan guard and upper shell (see Upper
Shell Removal, page 9).
Combustion
Chamber
Figure 23 - Removing Nozzle/Adapter
Assembly
Nozzle Face
Nozzle
Nozzle Adapter
Air Line
Fitting
Figure 24 - Nozzle and Nozzle Adapter
114008-01A
Nozzle/
Adapter
Assembly
Nozzle Sleeve
Fuel Line Fitting
www.desatech.com
(For 200 Model Only)
1. Remove combustion chamber and ignitor by
following steps 1 through 7 under Ignitor,
pages 11 and 12.
2. Carefully place the ignitor in a safe location.
3. Remove two nozzle adapter bracket screws
(see Figure 25).
4. Place hex-shaped aluminum nozzle adapter
into vise (do not overtighten).
5. Carefully remove nozzle from nozzle adapter
using 5/8" socket wrench (see Figure 26).
6. Blow compressed air through face of nozzle.
This will remove any debris in nozzle.
7. Inspect nozzle seal for damage.
8. Replace nozzle into nozzle adapter until
nozzle seats. Tighten 80-110 inch-pounds.
9. Attach nozzle adapter bracket to combustion
chamber with two screws removed in step 3.
10. Repeat steps 9 through 16 under Ignitor, pages
11 and 12.
Combustion
Chamber
Nozzle
Adapter
Bracket
Photocell
Bracket
Air Line
Hose
Figure 25 - Removing Air and Fuel Line
Hoses (200 Model Only)
Nozzle Face
Nozzle
Sleeve
Nozzle
Nozzle
Adapter
Bracket
Air Line
Fitting
Figure 26 - Nozzle and Nozzle Adapter
Nozzle
Adapter
Bracket
Screw
Nozzle/
Adapter
Assembly
Fuel Line Hose
Nozzle
Adapter
Fuel Line Fitting
13