Desa Master B35CED Manuel D'utilisation page 10

SERVICE PROCEDURES
8
GB
Model Pump pressure (Bar/PSI)
35.000 Btu/Hr 0,207 / 3
70.000 Btu/Hr 0,365 / 5,3
100.000 Btu/Hr 0,275 / 4
150.000 Btu/Hr 0,337 / 4,9
A.
Figure 19 – Adjusting pump pressure.
NOZZLE
(35,000 Btu/Hr Model)
1. Remove upper shell (see page 6).
2. Remove fan (see page 9).
3. Remove fuel and air line hoses from nozzle assembly.
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 through 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 4.5 to 5.1 N-m (40 to
45 in-lbs).
10.Attach nozzle assembly to burner strap.
11.Attach fuel and airline hoses to nozzle assembly. See Fuel
and Airline Replacement and Proper Routing see page 9.
12.Replace fan (see page 9).
13.Replace fan guard and upper shell.
A.
B.
E.
C .
D .
Figure 20 – Removing air
and fuel line hoses, 35.000
Btu/Hr Model.
A. Pressure gauge
.
Combustion
A
Chamber
B. Burner strap
C. Nozzle as-
sembly
D. Fuel line
hose
E. Air line hose.
C .
Figure 21 – Removing nozz-
le assembly, 35.000 Btu/Hr
Model.
B.
A.
F .
E.
D.
C.
Figure 22 – Nozzle and nozzle adapter, 35.000 Btu/Hr.
NOZZLE
(70/100/150,000 Btu/Hr Models)
1.Remove upper shell (see page 6).
2.Remove fan (see page 9).
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 24).
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 fi rmly (9.1-12.4
n-m/80-110 inch-pounds).
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 9).
17.Replace fan guard and upper shell.
B.
A.
G .
F.
D .
E.
Figure 23 – Removing burner head, 70.000, 100.000,
150.000 Btu/Hr models.
A.
B.
F.
E.
Figure 24 – Removing nozzle, 70.000, 100.000, 150.000
Btu/Hr models.
A. Nozzle face
B. Nozzle seal
C. Fuel line fi tting
D. Air line fi tting
E. Nozzle adapter
F. Nozzle
A. Combustion Chamber
C .
B. Burner head
C. Spark plug wire
D. Spark plug
E. Fuel line hose
F. Air line hose
G. Screw
A. Nozzle face
B. Nozzle seal
C. Foel line fi tting
D. Air line fi tting
E. Burner head
F. Nozzle
C .
D .
Continued