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4.3 AIR DAMPER SETTING
The regulation of the air-rate is made by adjusting the air damper (1), af-
ter loosing the screws (2).
When the optimal regulation is reached, screw tight the screws (2).
4.4 BURNER STARTING
Air evacuation: it can be obtained by opening the right screw on the
pressure test point placed at the beginning of the valves (see scheme
page 4).
REVISION OF THE GAS OUTPUTS
In order to obtain the gas output Qn under normal conditions
(0°C - 1013 mbar), correct the output measured at the counter Qr
with a corrective factor ( f ):
Qn = f . Qr
or:
Patm + Pgaz
f = 0.2695 .
273 + tgaz
Example:
Output measured at the counter . = 14 m
Atmospheric pressure . . . . . . . . = 998 mbar
Gas temperature . . . . . . . . . . . . . = 10°C
Gas pressure . . . . . . . . . . . . . . . . = 25 mbar
Corrective factor . . . . . . . . . . . . . = 0.9742
Nominal output . . . . . . . . . . . . . . = 13.64 m
4.5 COMBUSTION CHECK
It is advisable to set the burner according to the type of gas used and following the indications of the table:
EN 676
Theoretical max. CO
GAS
0 % O
G 20
11.7
G 25
11.5
G 30
14.0
G 31
13.7
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 measure the ionization current, you
must open the connector fitted to the red wire
and insert a microammeter.
20014622
3
(m
/h)
Patm = atmospheric pressure (mbar)
Pgaz = gas pressure at the counter (mbar)
tgaz = temperature at the counter (°C)
3
/h
3
Setting CO
2
= 1.2
2
9.7
9.5
11.6
11.4
/h
AIR EXCESS:
max. output 1.2 – min. output 1.3
%
2
= 1.3
9.0
8.8
10.7
10.5
Terminal board
of control-box
10
7
GB
4
3
NO
CO
mg/kWh
mg/kWh
100
170
100
170
100
230
100
230
Connector
Probe
D5006
2
1
D5231
x
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