12
EN
420010331102
M ulticalor 45 ÷ 140 AB/AB
ELECTRICAL CONNECTIONS
All burners are factory tested and set at 400 V 50 Hz three-phase for motors and 230 V 50 Hz monophase with neu-
tral for auxiliaries. If it is necessary to supply the burner at 230 V 50 Hz without neutral,make the necessary altera-
tions referring to the wiring diagram of the burner and check that the termal relay is within the absorption range of
the motor. Also check that the fan motor rotates in the correct direction.
CONNECTION TO THE GAS PIPELINE
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 con-
nector, 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 burner will be enabled to run the start-up sequence.
I
I
I
I
I
I
I
I
I
I
I
I
0
1
2
0 - STOP
1 - GASOLIO
2 - GAS
ADJUSTING THE COMBUSTION PROCESS
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.
NOTE:
ALL SAFETY DEVICES (AIR PRESSURE SWITCH, MINIMUM GAS PRESSURE SWITCH, GAS SOLENOID
VALVES AND GAS GOVERNOR) SHALL BE DULY SEALED AFTER CALIBRATION AND BURNER START
UP BY ECOFLAM’S TECHNICIANS.
ECCESSO D'ARIA (%)
FATTORE D'ARIA
10
10
20
3
0
40 50 60
70
8
0
90
100
200
3
00 400
500
600
700
8
00
900
1000
2000
1,1
1,15
1,2
1,2
1,2
1,25
1,
3
15
20
25
3
0
POTENZA UTILE NOMINALE (kW)
SUGGESTED REFERENCE VALUES
N
a
t
u
r
a
l G
as
CO
2
9,6%
CO <100 ppm
EXCESS AIR (%)
AIR FACTOR
RATED USEFUL CAPACITY (KW)
OPERATION OF BURNER WITH GAS
PRELIMINARY CHECKS
Before starting up the boiler check the following:
• gas type and feed pressure;
• gas valves closed;
• the seals in the pipe fittings;
• gas pipe breather and input pressure;
• that the cable complies with the diagram and the phase and neutral wires correspond;
• that the burner shuts down when the boiler thermostat opens
• the seal of the boiler furnace which prevents air from entering
• the seal on the flue-boiler pipe fitting;
• the condition of the flue (sealed, free from blockage, etc.).
If all these conditions are present, start the burner. The control device starts the motor to carry out prewashing of the
combustion chamber. During this prewash period (about 30 seconds) the device checks that air pressure is correct via
the air pressure switch. At the end, it supplies power to the transformer and opens the gas valves. The flame must be lit
and stabilize within 3 seconds, which is the device's safety time limit. Check to ensure the flame is lit before placing any
control instrument in the flue. Adjust and check the gas flow necessary for the boiler at the meter. Adjust the air flow
according to the gas flow to obtain correct combustion.
IMPORTANT ADVICE
All adjustable parts must be fixed by the installer after making adjustments. Check flue combustion after each adjust-
ment. The CO
2
values must be approx. 9.7 (G20) 9.6 (G25 11.7 (G30) 11.7 (G31) and the CO must be less than 75
ppm.
