Desa BY100CEB Service Procedures, Continued, 35,000 Btu/Hr Model, 70/100/150,000 Btu/Hr Models

OWNER’S MANUAL

SERVICE

PROCEDURES

Continued

Nozzle

(35,000 Btu/Hr Model)

1.Remove upper shell (see page 8).

2.Remove fan (see page 13).

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 thru face of nozzle. This will free any dirt in nozzle area.

8.Inspect nozzle seal for damage.

9.Replace nozzle into nozzle adapter un- til nozzle seats. Tighten 1/3 turn more using 5/8" socket wrench (4.5-5.1 n-m/ 40-45 inch-pounds).

10.Attach nozzle assembly to burner strap.

11.Attach fuel and airline hoses to nozzle assembly.

12.Replace fan (see page 13).

13.Replace fan guard and upper shell.

Combustion

Chamber

Nozzle

Assembly

Fuel Line

Hose

Air Line

Hose

Figure 20 - Removing Air and Fuel Line Hoses, 35,000 Btu/Hr Model

Burner

Strap

Nozzle

Assembly

Figure 21 - Removing Nozzle Assembly, 35,000 Btu/Hr Model

Nozzle

Face

Nozzle

Seal

Nozzle

Nozzle

Adapter

Air line

Fitting

Fuel line

Fitting

Figure 22 - Nozzle and Nozzle Adapter, 35,000 Btu/Hr Model

Nozzle

(70/100/150,000 Btu/Hr Models)

1.Remove upper shell (see page 8).

2.Remove fan (see page 13).

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 Fig- ure 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 firmly (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 13).

17.Replace fan guard and upper shell.

Combustion	Burner
Chamber	Head
	Spark Plug
Screw	Wire
	Spark
	Plug

Fuel Line

Air LineHose

Hose

Figure 23 - Removing Burner Head, 70/ 100/150,000 Btu/Hr Models

Nozzle

Face

Nozzle

Seal

Nozzle

Burner Head

Fuel line

Fitting

Air line Fitting

Figure 24 - Removing Nozzle, 70/100/ 150,000 Btu/Hr Models

Continued

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