Desa D30N, D20N, D44N owner manual Nozzle Assembly, Fuel and AIR Line Replacement Proper Routing

Page 11

OWNER’S MANUAL

SERVICE

PROCEDURES

Continued

NOZZLE ASSEMBLY

1.

Remove upper shell (see page 8).

2.

Remove fan (see page 13).

3.

Remove fuel and air line hoses from nozzle

 

assembly (see Figure 17, 18, or 19).

4.

Turn nozzle assembly 1/4 turn to left

 

and pull toward motor to remove (see

 

Figure 20).

Combustion Chamber

Burner

Strap

Air Line

Hose

Photocell Bracket

Nozzle/

Adapter

Assembly

Fuel Line

Hose

FUEL AND AIR LINE

REPLACEMENT AND

PROPER ROUTING

1.

Remove upper shell (see page 8).

2.

Remove side cover screws using 5/16"

 

nut driver.

3.

Remove side cover.

4.

Inspect fuel and air line hoses for cracks

 

and/or holes. If fuel line hose is dam-

 

aged, disconnect from nozzle adapter

 

(see Figure 17, 18, or 19) and from fuel

 

filter (see page 8). If air line hose is

5. Place plastic hex-body into vise and

lightly tighten.

Figure 18 - Removing Air and Fuel Line Hoses (D30N Model Only)

damaged, disconnect from

nozzle

adapter (see Figure 17, 18, or 19) and

6.

Carefully remove nozzle from the

 

nozzle adapter using 5/8" socket

 

wrench (see Figure 21).

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 un-

 

til nozzle seats. Tighten 1/3 turn more

 

using 5/8" socket wrench (40-45 inch-

 

pounds). See Figure 21.

10.

Attach nozzle assembly to burner strap.

11.

Attach fuel and airline hoses to nozzle

 

assembly. See Fuel and Airline Re-

Combustion

Chamber

Burner

Strap

Photocell

Bracket

Air Line

Hose

Nozzle/

Adapter

Assembly

Fuel Line

Hose

from barb fitting on pump end cover

(see Figure 22).

5. Install new air and/or fuel line. Attach

one end of air line hose to barb fitting

on pump end cover (see Figure 22) and

the other end to nozzle adapter (see

Figure 17, 18, or 19). Attach one end

of fuel line hose to fuel filter (see page

8) and the other end to nozzle adapter

(see Figure 17, 18,or 19).

Route air and fuel line approximately as shown. For D20N model heater, see Figure 17. For D30N model heater, see Figure 18. For D44N model heater, see Figure 19.

 

placement and Proper Routing.

12.

Replace fan (see page 13).

13.

Replace fan guard and upper shell (see

 

page 8).

Combustion

Chamber

Figure 19 - Removing Air and Fuel Line Hoses (D44N Model Only)

Combustion

Nozzle/

Chamber

 

Adapter

 

Assembly

Note: Hoses are not to be touching pho- tocell bracket.

6.Replace side cover.

7.Replace upper shell and fan guard (see page 8).

Pump End Cover

Barb Fitting

Burner

 

Figure 20 - Removing Nozzle/Adapter

Strap

 

 

 

Assembly

Photocell

 

Nozzle Face

Nozzle/

Nozzle

Bracket

Adapter

 

Seal

 

Assembly

 

 

Air Line

 

Nozzle

Hose

Fuel Line

Nozzle

 

 

Hose

Adapter

Figure 17 - Removing Air and Fuel Line

Air Line

Hoses (D20N Model Only)

Fitting

 

 

Fuel Line Fitting

 

Figure 21 - Nozzle and Nozzle Adapter

Air Hose

Figure 22 - Air Hose to Barb FItting

Continued

105843

11

Image 11
Contents Portable Forced AIR Heaters D20N, D30N and D44N Models Portable Forced AIR Heaters Safety InformationFuels Product Identification UnpackingTools Needed AssemblyVentilation To Start Heater To Reset HeaterExtension Cord Wire Size Requirements Theory OperationSchedule Preventative MaintenanceTroubleshooting Storing TRANSPORTING, or ShippingPhotocell and ignition control assembly Obstruction in nozzle assemblyWater in fuel tank Drain and flush fuel tank with clean ON/OFF switch light remains on FilterD20N Model Service ProceduresUpper Shell Removal Fuel FilterIgnitor Disconnecting Ignitor Wires from Ignition Control AssemblyAIR OUTPUT, AIR INTAKE, and Lint Filters Pump Pressure AdjustmentFuel and AIR Line Replacement Proper Routing Nozzle AssemblyPump Rotor Procedure if Rotor is BindingFAN Ignition Control AssemblyRemove Old Assembly Installing the New AssemblyD20N Model Motor and Pump AssemblyIllustrated Parts Breakdown Number Description QTY Parts ListD30N Model KEY Part Number Description QTY D44N Model Desired part D44N ModelNTC-3C Wheels and HandlesWiring Diagram SpecificationsAccessories EC Conformity Declaration EC Conformity Declaration105843 Warranty Information

D30N, D44N, D20N specifications

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