57
Step 3: Adjustment on the gas valve
Adjust the gas valve only in case the measured values lies out of range of the values mentioned in the table
on previous page.
- Open the boiler as described on page 55;
- Set the boiler on full load (see Step 1)
- The CO
2
values are set by using an Allen key (2 mm), or a large at
head screwdriver, on the screw “b”.
Please observe the following rotating direction:
- Clockwise means less CO
2
- Counterclockwise means more CO
2
a
b
After this setting has been made, once more test the CO
2
value at full load
and low load. See Step 1 and 2.
Adjustment of the gas valve in case the measured values lies out of range of the values on full load (Step 3)
Full load Natural gas (G20) Propane (G31)*
CO
2
9.0% 10.3%
Values are valid with closed cover/air box.
Legend
a Measuring point for the ue gas
probe
b Set screw for CO
2
* Only possible if LPG conversion kit is installed!
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