Desa BTU/HR Service Procedures, Continued, Nozzle Assembly, Removing Nozzle/Adapter Assembly

SERVICE PROCEDURES

Continued

Combustion

Chamber

Nozzle
Adapter
Bracket	Nozzle/
Photocell	Adapter
	Assembly
Bracket

Air Line	Fuel Line Hose
Hose

Figure 23 - Removing Air and Fuel Line Hoses (40/50/55/60/70 Models Only)

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 26).

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 26.

10.Attach nozzle assembly to burner strap (see Figure 25).

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

Nozzle

Adapter

Bracket

Air Line

Hose

Fuel

Line

Hose

Nozzle/

Adapter

Assembly

Photocell

Bracket

Combustion

Chamber Nozzle/

Adapter

Assembly

Figure 25 - Removing Nozzle/Adapter

Assembly

Figure 24 - Removing Air and Fuel Line Hoses (110/115/155/165 Models Only)

NOZZLE ASSEMBLY

(For 40/50/55/60/70/110/115/155/165 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 23 or 24).

4.Turn nozzle assembly 1/4 turn to left and pull toward motor to remove (see Figure 25).

Nozzle Face

Nozzle Sleeve

Nozzle

Nozzle Adapter

Air Line

Fitting

Fuel Line Fitting

Figure 26 - Nozzle and Nozzle Adapter

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