Installation & Servicing instructions ATAG iC-Range
55
13.1 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 Flue Gas Analyser must be carried out
during commissioning.
- 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)
Set the full load
You can set the full load of the boiler as follows:
- 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 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.
After this check has been done at full load, the CO
2
value at low load need to be tested (see Step 2 on page
56). If there are any deviations in the result, then these must be corrected (see Step 3 on page 57).
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.
a
* Only possible if LPG conversion kit is installed!
