45
Step 2: CO
2
check on low load
Set the low load
The low load of the boiler can be set by you as follows:
- Press on the - button until the minimum value (0%) has been reached (low load)
- Use the measuring tool to carry out a CO
2
control measurement. The detected values must lie in the
measuring range shown below.
The CO
2
value at low load must be lower than the CO
2
value at full load. The measuring procedure must
be carried out, until a constant measuring result is achieved. Please contact ATAG, if the values should lie
outside of the applicable tolerances.
End of measuring:
- Press the ESC button (
button).
The device switches o.
The display shows for 2 seconds code 180 or 181.
This completes the procedure.
The maximum duration of the commissioning function, without interruption, is 8 minutes.
%
Measuring point CO
2
Figure 15.1.a
CO
2
check on low load (Step 2)
Low load Natural gas (G20) Propane (G31)
CO
2
Minimal 0,3% lower than measured on full load Minimal 0,1% lower than measured on full load
Minimum 7,5% Minimum 8,9%
Values are valid with closed cover/air box.
a
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