Nozzle

(20,5/26,4/44 kW [70/90/150,000 Btu/Hr] Models)

1.

Remove upper shell (see

 

page 10).

2.

Remove fan (see page 17).

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

Combustion

Chamber

Burner Head

Spark Plug

Wire

Screw

Spark

Plug

Air Line Hose

Fuel Line Hose

Figure 23 - Removing Burner Head, 20,5/26,4 kW (70/90,000 Btu/Hr) Models

head and tighten firmly

(80-110 inch-pounds/9.1-

12.4 n-m).

12. Attach burner head to

combustion chamber.

Nozzle Face

Nozzle Seal

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 17).

17. Replace fan guard and

upper shell.

Nozzle

Burner

Head

Air line

Fuel line

Fitting

Fitting

Figure 24 - Removing Nozzle, 20,5/26,4 kW (70/90,000 Btu/Hr) Models

15

102748

Page 15
Image 15
Desa 000) 26, 000) 20 owner manual Remove upper shell see

000) 26, 000) 20 specifications

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