Riello Gulliver BS3/M TXL, Installation, Use And Maintenance Instructions

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20050873
14
GB
4.5 COMBUSTION CHECK
In conformity with Efficiency Directive 92/42/EEC the application of the burner on the boiler, adjustment and
testing must be carried out 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:
IONIZATION CURRENT
The minimum current necessary for the control box operation is 2 µA.
The burner normally supplies a higher current value, so that no check is needed. Anyway, if you want to
measure the ionization current, you have to open the connector
(CN3) , (see electrical scheme page 8) fitted
on the wire and insert a microammeter.
4.6 AIR PRESSURE SWITCH
Adjust the air pressure switch once you have performed all the other burner adjustments with the air pressure
switch set to the start of the scale. With the burner operating at minimum output, turn the knob slowly clockwise
until the burner locks out. Next, turn the knob anticlockwise by a value of approx. 20% of the set value and then
make sure the burner starts properly. If the burner locks out again, turn the knob just a bit further anticlockwise.
Attention:
As a rule, the air pressure switch must prevent the air pressure from lowering below 80 % of the adjustment
value as well as preventing the CO in the fumes from exceeding 1% (10,000 ppm).
To check this, insert a combustion analyser into the chimney, slowly close the fan suction inlet
(for example
with cardboard) and check that the burner locks out, before the CO in the fumes exceeds 1 %.
4.7 GAS PRESSURE SWITCH
For the gas pressure switch setting see the gas train instruction manual.
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 30 14.0 11.6 10.7

100

230
G 31 13.7 11.4 10.5

100

230
Probe
Connector
Terminal block
of control-box
D5006
1
Fig. 14