Riello Gulliver BS2D TL Installation, Use And Maintenance Instructions page 62

4.3 AIR DAMPER ADJUSTMENT,
First start-up must always be performed, adjusting screw (12), so
st
that the 1 stage air damper position pointer is beyond mark 1,
(factory setting mark 1).
To adjust, proceed as follows:
nd
Take the burner to 2

in the 4-pin plug (X4, wiring on page 8).
Fan thrust causes the air damper to go to the 2

reference to the factory setting (screw 8 on mark 3).
Loosen nut (9) and turn screw (8) to adjust 2

CO values given in the table below).
2
st
Take the burner to 1

in the 4-pin plug (X4, page 8).
st
Adjust 1 stage by turning screw (12), loosening (clockwise) nut (11)

first, referring to the table below for CO
Once you have achieved the optimal setting, tighten (anticlock-

wise) nut (11). When the burner stops, the air damper closes
automatically under its own weight until maximum negative flue
pressure is 0.5 mbar.
ATTENTION
st nd
To adjust 1 and 2 stage output, follow the instructions below:
st
Output ratio between 1
nd
Example for BS3D: 2
Minimum 1
Whatever the case, the burner's minimum 1
the operating range.
nd
Example for BS3D: 2
Minimum 1
4.4 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 con-
trol box operation is 5 µA.
The burner normally supplies a higher cur-
rent value, so that no check is needed. Any-
way, if you want to measure the ionization
current, you have to open the connector
(CN1) (see electrical scheme page 8) fitted
on the wire and insert a microammeter.
3115
(fig. 10)
stage by closing the T6-T8 connection found
nd
nd
stage by opening the T6-T8 connection found
values.
2
nd
and 2 stage must be no more than 1:2.
stage output required 140 kW;
st
stage output no less than 70 kW.
st
stage output required 110 kW;
st
stage output no less than 65 kW (minimum in operating range page 4).
AIR EXCESS: max. output 
Setting CO
2
 = 1.2
2
9.7
9.5
11.6
11.4
Fig. 10
-stage position with
-stage air flow (see
stage output must not be lower than the value indicated in
%
2
 = 1.3
9.0
8.8
10.7
10.5
10 GB
0
5
6
 1.2
– min. output 
CO
mg/kWh
mg/kWh

100

100

100

100
CN1
_
+
D4631
8
9
1
2
3
4
11
12
 1.3
NO
x

170

170

230

230
SO