Checking The Combustion Parameters - Wolf CGB-2 Service Instructions Manual

If work was carried out on the ionisation electrode or the ignition electrode during maintenance, carry out a full cali-
bration. See description HG43 in chapter "Parameter description" in the installation instructions.
The condensing boiler is equipped with electronic combustion control which ensures optimum combustion quality. For
a detailed description of the combustion control, see chapter "Combustion air control".
During commissioning and maintenance, a check of CO, CO
with the boiler closed.
A flue gas emissions test by a contractor is necessary after every modification of the GBC-e PCB,
mixing device, burner and gas valve.
Note: The combustion control carries out an automatic calibration after every boiler start. This can lead to briefly
increased CO emissions.
Therefore, test the emissions no sooner than 60 seconds after the burner has started.
Checking the intake air
1. Remove screw A from the left hand test port.
2. Open the gas ball valve.
3. Insert the test probe.
4. Switch ON the boiler and select Emissions test via
the function keys.
5. Check the temperature and CO
6. In the case of a balanced flue, the flue is not gas-
tight if the CO content is > 0.3 %. The leak must be
2
rectified.
7. After the test has been completed, switch the boiler
OFF, remove the test probe and close the test port.
Ensure the screws are tightly secured.
Checking the flue gas parameters
When the test port is open, flue gas can
escape into the installation room. There is
a risk of asphyxiation.
1. Remove screw B from the right hand test port.
2. Open the gas ball valve.
3. Insert the test probe.
4. Switch ON the boiler and select the Emissions test
key.
5. Carry out the checks after a minimum of 60 seconds
of operation, measuring first at maximum load and
then at minimum load.
6. Flue gas values (for permissible values, see table)
Gas type
Natural gas E/H/
LL
LPG (G31) 9.1 - 11.4
Max. base CO value = 11.7 % (G20)
1)
2
Max. base CO value = 13.7 % (G31)
2)
2
7. After the test has been completed, switch the boiler
OFF, remove the test probe and close the test port.
Ensure the screws are tightly secured.
3064812_201804
16. Checking the combustion parameters
.
2
14/20/24kW-appliance
CO in % O in %
2 2
3.5 - 7.0
7.8 - 9.8
1)
2)
is required. Test the combustion parameters
or O
2 2
Lambda
1.35
+/- 0.15
Seite 30
A
B
Status
Operating mode
Heating mode
Burner status
ON
23