Filter
Top Products
11
105787
OWNER’S MANUAL
Continued
SERVICE
PROCEDURES
Continued
Figure 18 - Removing Air and Fuel Line
Hoses (100,000 Btu/Hr Model Only)
Figure 20 - Removing Nozzle/Adapter
Assembly
Figure 21 - Nozzle and Nozzle Adapter
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).
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 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 4.5 to 5.1 N-
m (40 to 45 in-lbs). See Figure 21.
10. Attach nozzle assembly to burner strap.
11. Attach fuel and airline hoses to nozzle
assembly. See Fuel and Airline Re-
placement and Proper Routing.
12. Replace fan (see page 13).
13. Replace fan guard and upper shell (see
page 8).
Continued
Figure 19 - Removing Air and Fuel Line
Hoses (150,000 Btu/Hr Model Only)
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 damaged,
disconnect from nozzle adapter (see Fig-
ure 17, 18, or 19) and from fuel filter (see
page 8). If air line hose is damaged, dis-
connect from nozzle adapter (see Figure
17, 18, or 19) and 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).
For 35/50/70,000 Btu/Hr model heat-
ers, route air and fuel lines approxi-
mately as shown in Figure 17.
Note:
Hoses are not to be touching pho-
tocell bracket.
For 100,000 Btu/Hr model heater, route
air and fuel lines approximately as
shown in Figure 18.
Note:
Hoses are not to be touching pho-
tocell bracket.
For 150,000 Btu/Hr model heater, route
air and fuel lines approximately as
shown in Figure 19.
Note:
Hoses are not to be touching pho-
tocell bracket
6. Replace side cover.
7. Replace upper shell and fan guard (see
page 8).
Figure 22 - Air Hose to Barb FItting
Nozzle Face
Nozzle
Nozzle Seal
Nozzle Adapter
Air Line Fitting
Fuel Line Fitting
Nozzle/
Adapter
Assembly
Combustion
Chamber
Fuel Line Hose
Nozzle/
Adapter
Assembly
Combustion
Chamber
Photocell
Bracket
Air Line
Hose
Fuel Line
Hose
Nozzle/
Adapter
Assembly
Combustion
Chamber
Air Line
Hose
Photocell Bracket
Figure 17 - Removing Air and Fuel Line
Hoses (35/50/70,000 Btu/Hr Models Only)
Fuel Line Hose
Nozzle/
Adapter
Assembly
Combustion
Chamber
Photocell
Bracket
Air Line
Hose
Barb Fitting
Air Hose
Pump End Cover
Nozzle
Adapter
Bracket
Nozzle Adapter
Bracket
Nozzle Adapter
Bracket