Desa B600D - Manual (Page 10)

10 099507
HIGH PRESSURE PORTABLE FORCED AIR
HEATER 350,000 AND 600,000 BTU/HR
Figure 7 - Spark Plug Removal
Spark
Plug Wire
Spark Plug
Burner Head
SPARK PLUG
1. Remove upper shell (see column 1).
2. Remove spark plug wire from spark
plug (see Figure 7).
3. Remove spark plug from burner head
using 13/16" open-end wrench (see
Figure 7).
4. Replace spark plug if damaged or
heavily coated with carbon.
5. Clean and regap spark plug electrodes
to .075 inch (see Figure 8).
6. Install spark plug in burner head.
7. Attach spark plug wire to spark plug.
8. Replace upper shell.
.075
inch
NOZZLE
1. Remove upper shell (see column 1).
2. Remove fuel line from solenoid valve
using 7/16" wrench.
3. Remove spark plug wire from spark plug.
4. Remove spark plug from burner head
using 13/16" open-end wrench.
5. Remove five screws using 5/16" nut-
driver and remove burner head from
combustion chamber.
6. Place burner head into vise and
lightly tighten.
7. Carefully remove nozzle from burner
head using 5/8" socket wrench (see Fig-
ure 9, page 11).
8. Inspect nozzle for damage. If damaged
or clogged, replace nozzle.
9. Make sure plug is in place on burner head.
10. Replace nozzle into burner head and
tighten firmly (175-200 inch-pounds).
11. Attach burner head to combustion
chamber.
12. Install spark plug in burner head.
13. Attach spark plug wire to spark plug.
14. Attach fuel line to solenoid valve.
Tighten firmly.
15. Replace upper shell.
Figure 8 - Spark Plug Gap
SERVICE
PROCEDURES
WARNING: Never service
heater while it is plugged in, op-
erating, or hot. Severe burns and
electrical shock can occur. Only
a qualified service person should
service and repair heater.
UPPER SHELL REMOVAL
1. Remove screws along each side and top
of heater using 5/16" nut-driver. These
screws attach upper and lower shells
together (see Figure 5).
2. Lift upper shell off.
Figure 6 - Fan Blades and Air Deflectors
Fan Blade
Figure 5 - Upper Shell Removal, 600,000
Btu/Hr Model
Upper Shell
FAN BLADES AND AIR
DEflECTORS
1. Remove upper shell (see column 1).
2. Clean fan blades and air deflectors with
clean, soft cloth moistened with kero-
sene or solvent (see Figure 6).
3. Dry fan blades and air deflectors thor-
oughly.
4. Replace upper shell.
Air Deflector