SERVICE PROCEDURES
Continued
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
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.
PUMP PRESSURE ADJUSTMENT FOR HEATERS WITH FUEL FILTER/ CANISTER EXTERNAL TO PUMP
1.Remove pressure gauge plug from fuel pump port marked “GAUGE.”
2.Install accessory pressure gauge (part num- ber
3.Start heater (see Operation, page 5). Allow motor to reach full speed.
4.Adjust pressure. Use small flat blade screw- driver to turn slotted screw at fuel pump pres- sure adjusting port. Turn screw clockwise to increase pressure. Turn screw counterclockwise to decrease pressure. See specifications in Fig- ure 11 for correct pressure for each model.
5.Stop heater (see page 5).
6.Remove pressure gauge. Replace pres- sure gauge plug in fuel pump port marked “GAUGE.”
Model | Pump Pressure |
350,000 Btu/Hr | 100 PSI |
600,000 Btu/Hr | 110 PSI |
PUMP PRESSURE ADJUSTMENT FOR HEATERS WITH FUEL FILTER INTERNAL TO PUMP
1.Remove pressure gauge plug from fuel pump port marked “GAUGE.”
2.Install accessory pressure gauge (part num- ber
3.Start heater (see Operation, page 5). Allow motor to reach full speed.
4.Adjust pressure. Use small flat blade screw- driver to turn slotted screw at fuel pump port at top right side of pump. Turn screw clockwise to increase pressure. Turn screw counterclockwise to decrease pressure. See specifications in Figure 12 for correct pressure for each model.
5.Stop heater (see page 5).
6.Remove pressure gauge. Replace pres- sure gauge plug in fuel pump port marked “GAUGE.”
Model | Pump Pressure |
350,000 Btu/Hr | 100 PSI |
600,000 Btu/Hr | 110 PSI |
Pressure | psi |
Gauge |
|
Fuel Pump |
|
Port Marked |
|
“GAUGE” |
|
Pressure
Gauge
psi | Fuel Pump | |
Fuel Pump Port | Port Marked | |
“PRESS ADJ” | ||
Marked “GAUGE” |
Figure 11 - Adjusting Pump Pressure
Pressure
Adjustment Port
Figure 12 - Adjusting Pump Pressure
12 | www.desatech.com |