Ecoflam Multicalor 170.1 Manual De Instrucciones página 27

WORKING OF THE BURNER WITH LIGHT-OIL FUEL
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 the same are sealed. - The type of fuel, which must be suitable for bur-
ner. - The connection of boiler's thermostats and all the safeties. - The motor rotation
direction. - The correct calibration of the motor's thermal protection.
When all the above mentioned conditions are checked and accomplished, it is possible
to go on with burner's tests. Power the burner. The control box feeds the ignition tran-
sformer and the burner's motor at the same time, which will run a prepurging of the
combustion chamber for about 20 sec. At the end of prepurging, the control box opens solenoid valves and the burner
starts. After a safety interval of 5 seconds and a correct ignition, the control box turns off the ignition transformer and,
10 seconds later, sets the motorised air damper to its maximum opening (High flame). In case of faulty ignition, the
control box switches the burner into safety condition within 5 second. In such a case, the manual rearming of the bur-
ner shall not take place before 30 seconds have elapsed from the burner's safety shutdown. In order to obtain an opti-
mal combustion, it is necessary adjust the LOW - HIGH flame air flow, according to the instruction given further on.
During such a phase, it will be possible to manually switch between HIGH and LOW flame and viceversa, through the
High/Low flame switch. At the end of the adjusting phase, leave the switch in position AUTO.
The diagram illustrates the fuel feeding system of these types of burners, which incorporates a by-
pass nozzle with oil flow regulation on its return pipe. The oil supply is varied by acting on the
nozzle through the pressure in the return line. Max. oil supply is therefore reached when the pressu-
re in the pump line is about 22 bar and the return line is fully closed; min. oil supply when the
return line is fully open. Relevant pressure readings in the return line are as follows:
Pump pressure 22-25 bar.
Max Burner output, return oil pressure:
FLUIDICS nozzle : 16 ÷19 bar.
BERGONZO nozzle : 20 ÷24 bar.
Min Burner output, return oil pressure:
FLUIDICS nozzle : 6 ÷9 bar
BERGONZO nozzle : 4 ÷8 bar
OIL DELIVERY ADJUSTMENT
POSITION OF IGNITION ELECTRODES
3÷4 mm
pag.27
420010243004 MULTICALOR 170.1-200.1 PR/PR
SAgG
1
0
5÷6 mm
EN
2 0=STOP
3
1=OIL
2=AUTO
3=GAS