Inspection and maintenance
52
Installation and maintenance instructions ecoTEC 0020173113_01
12
1
12.1
Measuring the CO
2
concentration
i
The boiler is fitted with a flue gas analysis point
(
1
). A suitable flue gas analyser can be con-
nected to this point to establish the combustion
performance of the boiler.
>
Remove the front casing (
¬ section 4.7
).
>
Start the testing program P.01 (
¬ section 10.2
).
>
Wait at least 5 minutes until the boiler reaches its oper-
ating temperature.
>
Measure the CO
2
concentration at the flue gas analysis
point (
1
). Compare the measured value with the corre-
sponding value in
¬ table 12.1
.
>
If all these points are as required, proceed as described
in
¬ section 12.2
.
>
If one of the flue gas values is greater than the accepta-
ble values in
¬ table 12.1
, then proceed as described in
the following
¬ section 12.1.4
.
12.1.4
Adjusting the CO
2
concentration (or the air
ratio)
a
Danger!
Increased risk of poisoning due to incor-
rect settings!
If one of the flue gas values is greater than
the acceptable values in
¬ table 12.1
then:
>
Check the integrity of the complete flue
gas installation.
>
Check the integrity of the combustion
circuit seals.
>
Check the gas inlet working pressure.
>
Check the gas flow rate.
2
1
12.2
Removing the covering cap for the air ratio setting adjust-
ing screw (gas setting) and making the air ratio setting
If the flue gas value needs to be adjusted, proceed as
follows.
The adjusting screw for making the air ratio setting is
located beneath a blue covering cap (
1
), which is easy to
remove.
>
Remove the yellow sticker.
>
Remove the covering cap.
>
Set the relevant CO
2
value (value with removed front
casing
¬ table 12.1
) by turning the screw (
2
). Use a
2.5 mm Allen key for this.
– Turn to the left: higher CO
2
concentration,
– Turn to the right: lower CO
2
concentration.
i
Channel islands gas: Only perform the adjust-
ment in very small increments (approximately
1/16 turns), and wait approximately 1 minute
after each adjustment until the value stabilises.
>
Press the "Cancel" selection button once the settings
have been adjusted.
>
When the adjusting work is complete, put the covering
cap back on again.
>
Put the front casing back on (
¬ section 4.7
).
