Idiomas disponibles
Idiomas disponibles
All burners factory tested at 400 V 50 Hz three-phase for motors and 230 V 50 Hz monophase with neutral for auxi-
liary equipment. If mains supply is 230 V 50 Hz threephase withuot neutral, change position of connectors on burner
as in fig. Protect burner supply line with safety fuses and any other devices required by safety standards obtaining in the
country in question.
Once connected the burner to the gas pipeline, it is necessary to control that this last is perfectly sealed. Also verify that
the chimney is not obstructed. Open the gas cock and carefully bleed the piping through the pressure gauge connector,
then check the pressure value trough a suitable gauge. Power on the system and adjust the thermostats to the desired
temperature. When thermostats close, the sealing control device runs a seal test of valves; at the end of the test the bur-
ner will be enabled to run the start-up sequence.
Before starting the burner, make sure it is mounted correctly. Then check connections are correct according to the dia-
gram and piping is appropriate to the system. Before connecting the burner to the electricity supply, make sure voltage
corresponds to burner plate data. The connection diagram and start-up cycle are shown separately. For wiring from
control box to burner, see the enclosed connection diagram. Pay particular attention to neutral and phase connections :
never exchange them!. Vent air and impurities of gas pipe. Check gas pressure conforms to the
limits stated on the burner plate when connecting a master gauge to the test port provided on
the burner. Blower motor starts and pre-purging begins. Since pre-purging has to be carried out
with the max. air delivery, the burner control circuit turns the air damper to the max. delivery
position by the air servocontrol in approximately 30 seconds time. When the servocontrol is
fully open, a signal to the electronic control unit starts the 66 seconds (36 s. LFL 1.333)
seconds pre-purge cycle. At the end of the prepurging time, the air servocontrol gets to the Low
Flame position so that burner ignition is ensured at min. output. Simultaneously the ignition transformer receives vol-
tage and after 3 seconds (pre-ignition) opens the pilot gas valve. Fuel flows to the combustion head and ignites. Two
seconds after pilot gas valves have opened, the ignition transformer is excluded from the circuit. In case of no ignition
the burner goes to lock-out within two seconds. After 6 sec. open the working gas valve, governed by the gas firing but-
terfly valve.Now the burner is operating at the min. firing rate (about 30% of the max. firing rate). The air servocontrol
runs at the Low Flame position and in case the temperature control has to be set at the max. output it goes to a fully
open position of air damper and butterfly valve. During the burner-off periods the air damper closes up fully.
IMPORTANT: to obtain the right adjustment of the combustion and thermal capacity it is important to analyze the
reducts of combustion with the aid of suitable instruments. The combustion and thermal capacity adjustment is done
simultaneously, together with the analysis of the products of combustion, making sure that the measured values are sui-
table and that they comply with current safety standards. On this matter, please refer to the table and figure below.
THESE OPERATIONS MUST BE DONE BY PROFESSIONALLY-QUALIFIED TECHNICIANS.
ELECTRICAL CONNECTIONS
CONNECTION TO THE GAS PIPELINE
OPERATION OF BURNER WITH GAS
ADJUSTING THE COMBUSTION PROCESS
420010311300 MULTIFLAM 2000.1 - 2500.1 PR/PR TS
19
EN
2
1
0 - STOP
HEAVY-OIL
1 - GASOLIO
2 - GAS
0
