11
420010280903
Max 15 - 20 - 30
EN
Once having installed the burner, check the following items:
- The burner power feeding and the main line protection fuses.
- The correct electrical connections.
- The correct length of pipes and that the same are sealed.
- The type of fuel, which must be suitable for burner.
- The connection of boiler’s thermostats and all safeties.
When all said conditions are checked and accomplished, it is possible to go on with burner’s tests.
Power the burner. The control box feeds at the same time the ignition transformer and the burner’s motor,
which will run a prepurging of the combustion chamber for about 12 seconds. At the end of prepurging, the
control box opens the fuel pump solenoid valve, the ignition transformer produces a spark and the burner
ignites. After a safety interval of 5÷10 seconds and a correct ignition, the control box turns off the ignition
transformer. In case of faulty ignition, the control box switches the burner into safety condition within 10
secs. The fuel pump feeding pressure, must keep around 12 bar.
Note: With preheated version, the burner runs a preheating of the combustion head for about 1 minute. In
such a case, at the boiler’s thermostats make, the ignition signal shall be done by the thermostat mounted on
the preheater itself.
BURNER START-UP AND ADJUSMENT
NOZZLE CLEANING AND REPLACEMENT
Use only the suitable box wrench provided for this operation to remove the nozzle, taking care to not damage
the electrodes. Fit the new nozzle by the same care. Note: Always check the position of electrodes after having
replaced the nozzle (see illustration). A wrong position could cause ignition troubles.
6 mm
4 mm
1 - HOSE
2 - OIL FILTER
3 - OIL COCK
1 - 2
3
2
1
1
3
2
1
1
prepurging, due to a fuel pressure drop in the pump, rearm the burner’s lock-out to restart the burner. Do
never allow the pump working without oil for more than three minutes.
Note: before starting the burner, check that the return pipe is open. An eventual obstruction could damage
the pump sealing device.
