pag.9
LB1007
Minor 20.1/30.1
B
3,5 mm
6 mm
BURNER START-UP AND ADJUSMENT
Once having installed the burner, check the following items:
- The burner power feeding and the main line protection fuses
- The correct length of pipes and that sames are sealed.
- The type of fuel, which must be suitable for burner.
- The connection of boiler’s thermostats and all safeties.
- The motor direction of rotation.
- The correct calibration of the motor’s thermal protection.
When all said conditions are checked and accomplished, it is possible to go on with burner’s tests.
Power the burner, in this case the ventilation is continuous. 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 13 seconds
(20 seconds with Brahma control box). 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 seconds and a
correct ignition, the control box turns off the ignition transformer. In case of faulty ignition, the control box swit-
ches the burner into safety condition within 10 secs. In such a case, the manual rearming of the burner shall not
take place before 30 seconds are elapsed from the burner’s safety shutdown. The fuel pump feeding pressure, must
keep around 12 bar.
FIRING HEAD SETTING
AIR REGULATION SUCTION SIDE
MIN
MAX
–
+
MIN
MAX
MINOR 30
-
+
-
+
1
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