44
15.1 Checking the CO
2
The CO
2
check consists of 2 steps or, if necessary, 3 steps:
Step 1: Check on full load
Step 2: Check on low load
Step 3: Adjustment (if necessary).
Step 1: CO
2
check on full load
The CO
2
setting is preset at the factory on all boilers. A calibrated CO
2
control measurement must be carried
out during commissioning.
- Ensure that the boiler is in operation and that the heat, which it produces, can be discharged.
Set the full load
You can set the full load of the boiler as follows:
- Press both + buttons for 6 seconds (this will only give full CH output);
- When the ame symbol appears in the display press both + buttons again for 6 seconds;
- The display shows the ow water temperature (
appears in the display);
The boiler will switch to maximum power output of the boiler;
- Press 1x the eco- button;
the display shows XX% (heating capacity)
- Calibrate the CO
2
measuring tool, and then insert the ue gas probe of the measuring tool into the
measuring point of the ue 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.
After this check has been done, once more test the CO
2
value at low load (see Step 2 on page 45). If there
are any deviations in the result, then these must be corrected (see Step 3 on page 46).
Measuring point CO
2
Figure 15.1.a
CO
2
check on full load (Step 1)
Full load Natural gas (G20) Propane (G31)
CO
2
Nominal 9,0% Nominal 10,3%
Minimum 8,6%, maximum 9,6% Minimum 9,9%, maximum 11,0%
Values are valid with closed cover/air box.
6 sec.
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