Wolf CGB-2 - Combustion Parameter Checks and Calibration; Calibration and Emissions Testing Requirements; Intake Air and Flue Gas Measurements

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16.Checkingthecombustionparameters
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
2
or O
2
is required. Testthecombustionparameters
withtheboilerclosed.
AuegasemissionstestbyacontractorisnecessaryaftereverymodicationoftheGBC-ePCB,
mixingdevice,burnerandgasvalve.
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
2
.
6. In the case of a balanced ue, the ue is not gas-
tight if the CO
2
content is > 0.3 %. The leak must be
rectied.
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uegasparameters
When the test port is open, ue 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 rst at maximum load and
then at minimum load.
6. Flue gas values (for permissible values, see table)
14/20/24kW-appliance
Gastype CO
2
in % O
2
in % Lambda
Natural gas E/H/
LL
7.8 - 9.8
1)
3.5 - 7.0 1.35
+/- 0.15
LPG (G31) 9.1 - 11.4
2)
1)
Max. base CO
2
value = 11.7 % (G20)
2)
Max. base CO
2
value = 13.7 % (G31)
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.
Note: The combustion control carries out an automatic calibration after every boiler start. This can lead to briey
increased CO emissions.
Therefore, test the emissions no sooner than 60 seconds after the burner has started.
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A
B
Operatingmode
Heating mode
Burnerstatus
ON
Status