Desa B70D - Manual (Page 9)

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OWNER’S MANUAL
SERVICE
PROCEDURES
Continued
Figure 12 - Removing Air and Fuel Line
Hoses
NOZZLE ASSEMBLY
1. Remove upper shell (see page 7).
2. Remove fan (see page 7).
3. Remove fuel and air line hoses from
nozzle assembly (see Figure 12).
4. Turn nozzle assembly 1/4 turn to left
and pull toward motor to remove (see
Figure 13).
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 14).
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).
10. Attach nozzle assembly to burner strap.
11. Attach and route fuel and airline hoses
to nozzle assembly as shown (see Fig-
ure 12). Route photo cell wires as
shown in Figure 12.
12. Replace fan (see page 7).
13. Replace fan guard and upper shell.
Figure 13 - Removing Nozzle/Adapter
Assembly
Nozzle
Face
Nozzle
Nozzle
Seal
Nozzle
Adapter
Air Line
Fitting
Fuel Line
Fitting
Figure 14 - Nozzle and Nozzle Adapter
Nozzle/
Adapter
Assembly
Combustion
Chamber
Continued
Fuel Line
Hose
Nozzle/
Adapter
Assembly
Combustion
Chamber
Air Line
Hose
Burner
Strap
Photocell
Wires
FUEL AND AIR LINE
REPLACEMENT AND
PROPER ROUTING
1. Remove upper shell (see Upper Shell
Removal, page 7).
2. Remove side cover screws using 5/16"
nut driver (see Figure 8, page 8).
3. Remove side cover.
4. Inspect fuel and air line hoses for cracks
and/or holes. If fuel line hose is damaged,
disconnect from nozzle adapter (see Fig-
ure 12) and from fuel filter (see Fuel Fil-
ter, page 8). If air line hose is damaged,
disconnect from nozzle adapter (see Fig-
ure 12) and from barb fitting on pump
end cover (see Figure 15).
5. Install new air and/or fuel line. Attach
one end of air line hose to barb fitting
on pump end cover (see Figure 15) and
the other end to nozzle adapter (see
Figure 12). Attach one end of fuel line
hose to fuel filter (see Fuel Filter, page
8) and the other end to nozzle adapter
(see Figure 12). Route air and fuel line
approximately as shown in Figure 12.
Note: Route hoses as shown in Figure
12. Hoses are not to touch photocell
bracket.
6. Replace side cover.
7. Replace upper shell and fan guard (see
Upper Shell Removal, page 7).
Figure 15 - Air Hose to Barb FItting
Barb Fitting
Air Hose
Pump End Cover