Checking combustion CO
2
The CO
2
percentage is set in the factory. This has to be checked during commissioning,
inspection, maintenance and in case of a failure.
CO
2
High Load reading
This can be verified by means of the following action:
• Ensure that the boiler is in operation and that the heat, which it produces,
can be discharged
• If taps are opened the internal diverter motor will move and heat can be discharged
through the hot water side of the boiler. (multiple taps open is preferred)
• Calibrate the flue gas analyser
• Place the lance of the flue gas analyser into the flue gas test point
After this check has been done at full load, the CO
2
value at low load need to be tested.
If there are any deviations in the result, then these must be corrected (see Step 3).
• Press the chimney sweep button for 5 seconds;
• Turn the selector wheel until you reach 100%;
• Press OK; The boiler will switch to maximum power output (full load) of the boiler;
the screen shows 100% (heating capacity)
• Calibrate the Flue Gas Analyser, and then insert the flue gas probe of the Flue Gas Analyser
into the measuring point of the flue gas pipe “A” (see illustration)
• Wait for one minute and then carry out a combustion analysis
• Check whether the CO
2
values that are listed below correspond to the measured value
* Only possible if LPG conversion kit is installed! Note: Values are valid with closed cover/air box.
FULL LOAD NATURAL GAS G20 PROPANE GAS LPG G31*
CO
2
Nominal 9.0% Nominal 10.3%
Minimum 8.6% – Maximum 9.6% Minimum 9.9% – Maximum 11.0%
If required, you may turn the setting screw
"B" (see above illustration) to set the correct CO
2
percentage.
RESET
BACK OK
19°25/07/18 09:00
80°60°
ECO AUTO
Press OK to enter Menu
1.5 bar
Step 1: Set the full load
You can set the full load of the boiler as follows:
A
B
A - Measuring point for the flue gas probe B - Set screw for CO
2
22
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