Combustion Check; Air Pressure Switch; Gas Pressure Switch - Riello Gulliver BS2/M TL 916M Montage- Und Bedienungsanleitung

5.5 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
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:
EN 676
Theoretical max. CO
GAS
0 % O
G 20 11.7
G 30 14.0
G 31 13.7
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.
5.6

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 %.
5.7

GAS PRESSURE SWITCH

For the gas pressure switch setting see the gas train instruction manual.
3134
Setting CO
2
 = 1.2
2
9.7
11.6
11.4
Terminal block
of control-box
1
AIR EXCESS:
max. output  1.2 – min. output 

%
2
 = 1.3
9.0
10.7
10.5
Connector
Probe
D5006
13 GB
1.3

NO
CO
mg/kWh
mg/kWh
100 170
 
100 230
 
100 230
 
2
x