20037556
7
GB
COMBUSTION ADJUSTMENT
In conformity with Efficiency Directive 92/42/EEC, the application of the burner on the boiler,
adjustment and testing must be carried out by observing the instruction manual of the boiler,
including verification of the CO and CO
2
concentration in the flue gases, their temperatures and
the average temperature of the water in the boiler. It is advisable to set the burner according to
the type of gas used and following the indications of the table:
PROBE - ELECTRODE POSITIONING
IMPORTANT
Do not turn the starting electrode but leave it as shown in the drawing; if the starting electrode is put
near the ionization probe, the amplifier of the control box might be damaged.
IONIZATION CURRENT
The minimum current necessary for the control box operation is 3 µA.
The burner normally supplies a higher current value, so that no check is needed. However, if you want to meas-
ure the ionization current, you must open the connector fitted to the red wire and insert a microammeter.
EN 676
AIR EXCESS: max. output
1.2 – min. output
1.3
GAS
Theoretical max. CO
2
0 % O
2
Setting
CO
2
%
CO
mg/kWh
NO
x
mg/kWh
= 1.2
= 1.3
G 20
11.7
9.7
9.0
100
170
G 25
11.5
9.5
8.8
100
170
G 30
14.0
11.6
10.7
100
230
G 31
13.7
11.4
10.5
100
230
D5033
Ignition electrode
Diffuser
WARNING
2.5
–
3.5 mm
Probe
Probe
Electrode
Put the ceramic
near the diffuser disc
2
Legend
C
- Capacitor 100...470µF; DC 10...25V
ION
- Ionization probe
M
-
Microammeter, Ri max. 5000
S8270
