803
Thermo 230 / 231 / 300 / 301 / 350
8 Servicing
8.5.2 Burner Head Opening and Closing
The igniter box operates with high voltage. Prior to
opening the burner head the connectors of the cable
harness in the vehicle have to be disconnected to
prevent lethal injuries.
After closing burner head, reconnect connectors in the
vehicle.
NOTE:
Maintenance on the heater is easy. By swinging the
burner head open the following components become
accessible:
–
fuel pump and fuel nozzle
–
solenoid valve
–
igniter box
–
igniter electrodes
–
flame sensor
–
combustion chamber
–
nozzle block preheater (if installed)
In order to obtain a convenient burner head opening angle
it is required to disconnect the electrical connection(s) to
the temperature limiter and temperature sensor.
Opening
1. Disconnect electrical connections to temperature
limiter and temperature sensor.
2. Loosen nuts (3,
) enough to release hinge
bolts (2).
3. Swing hinge bolts (2) outwards.
4. Swing burner head (4) away.
Closing
1. If required engage burner head (4,
) into the
hinge and secure it using the cotter pin (1).
2. Swing burner head (4) into closed position.
3. Swing hinge bolts (2) into lock position and secure
with nuts (3).
4. Tighten nuts (3).
5. Reconnect electrical connections to the temperature
limiter and temperature sensor.
NOTE
When making electrical connections observe wiring color
codes.
Fig. 801 Swinging Burner Head open
High voltage!
Danger to life!
Warning!
1 Cotter pin
2 Screw (2)
3 Nut (2)
4 Burner head
1
2
3
4
NOTE
Depending on the burner head direction of swing the
cotter pin may be located on the opposite side.
7.5 +1 Nm
Summary of Contents for spheros thermo 230
Page 70: ...memos...
