See
Checking and setting the gas/air ratio, page 42
7.6.2 Checking and setting the gas/air ratio
1. Unscrew the cap from the flue gas measuring point.
2. Insert the probe for the flue gas analyser into the measurement
opening.
Warning
During measurement, seal the opening around the sensor fully.
Note
The flue gas analyser must have a minimum accuracy of
±0.25% O
2
/CO
2
.
The flue gas analyser must meet the requirements of BS 7927
or BS-EN 503793 and be calibrated according to the manufac
turer's requirements.
3. Measure the percentage of O
2
/CO
2
in the flue gases. Take meas
urements at full load and at low load.
Note
Measurements must be taken with the front housing off.
Checking/setting values for O
2
/CO
2
at full load
1. Set the boiler to full load. Press the two keys at the same time.
The display shows
. The symbol appears.
2. Measure the percentage of O
2
/CO
2
in the flue gases.
3. Compare the measured value with the checking values in the table.
Tab.23 Checking/setting values O
2
/CO
2
at full load for G20 (H gas)
Values at full load for G20 (H
gas)
O
2
(%)
CO
2
(%)
Quinta Pro 30
4.3 – 4.8
(1)
9.0
(1)
– 9.3
Quinta Pro 45
4.3 – 4.8
(1)
9.0
(1)
– 9.3
Quinta Pro 65
4.3 – 4.8
(1)
9.0
(1)
– 9.3
Quinta Pro 90
3.4 – 3.9
(1)
9.5
(1)
– 9.8
Quinta Pro 115
4.2 – 4.7
(1)
9.1
(1)
– 9.4
(1) Nominal value
Tab.24 Checking/setting values O
2
/CO
2
at full load for G31 (pro
pane)
Values at full load for G31 (pro
pane)
O
2
(%)
CO
2
(%)
Quinta Pro 30
4.1 – 4.6
(2)
10.7
(2)
– 11.0
Quinta Pro 45
4.1 – 4.6
(1)
10.7
(2)
– 11.0
Quinta Pro 65
4.1 – 4.6
(2)
10.7
(2)
– 11.0
Quinta Pro 90
4.1 – 4.6
(2)
10.7
(2)
– 11.0
Quinta Pro 115
4.4 – 4.9
(2)
10.5
(2)
– 10.8
(1) Nominal value
Caution
The O
2
values at full load must be lower than the O
2
values at
low load.
The CO
2
values at full load must be higher than the CO
2
values
at low load.
Fig.37 Flue gas measuring point
AD-0000069-01
Fig.38 Setting to full load
AD-0000070-01
rpm
kWµA
± 30
l/min
bar
Psi
St
ºC
ºCºFh
7 Commissioning
42
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