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420010683000 Minor 20.1 / 30.1
EN
- 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. 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 switches 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 ela-
psed from the burner's safety shutdown. 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 prehea-
ter itself.
FIRING HEAD SETTING
AIR REGULATION SUCTION SIDE
+
–
MINOR 30
MIN
MAX
-
+
MAX
1
7
-
+
MIN
11
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