35
20140262
GB
Start-up, calibration and operation of the burner
6.1
Notes on safety for the first start-up
6.2
Adjustments prior to ignition
Check the adjustment of the head as shown in page 18.
Check the adjustment of the air damper.
Slowly open the manual valves situated upstream from the
gas train.
Adjust the air pressure switch to start of the scale.
Purge the air from the gas line.
We recommend using a plastic tube routed outside the build-
ing and to purge air until gas is smelt.
6.2.1
Air damper setting
The air damper 10)(Fig. 25) leaves the factory set to 1.
To vary the setting proceed as follows:
loosen the nut 9) and act on the screw 8);
when the operation is completed, tighten nut 9).
6.3
Combustion adjustment
In conformity with Efficiency Directive EN 676, the application of
the burner on the boiler, the adjustment and testing must be car-
ried out in compliance with the instruction manual of the boiler, in-
cluding control of the CO and CO
2
concentration in the flue
gases, their temperature and the average temperature of the wa-
ter in the boiler.
It is advisable to set the burner according to the type of gas used
and following the indications in Tab. T.
Tab. T
6
Start-up, calibration and operation of the burner
ATTENTION
The first start-up of the burner must be carried out
by qualified personnel, as indicated in this manual
and in compliance with the standards and regula-
tions of the laws in force.
ATTENTION
Check the correct working of the adjustment, com-
mand and safety devices.
CAUTION
Before starting up the burner, it is good practice to
adjust the gas train so that ignition takes place in
conditions of maximum safety, i.e. with gas deliv-
ery at the minimum.
ATTENTION
Do not carry out the first ignition with the air damp-
er lower than set point 1.
9
10
-
+
8
Fig. 25
S9485
EN 676
Excess air: max. output
1.2 – min. output
1.3
GAS
Theoretical max CO2
0 % O2
Setting CO2 %
CO
mg/kWh
NOx
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
