Atag iR 15 - Page 42

Installation & Servicing instructions ATAG iR-Range
42
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 45;
- 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
6 sec.
-
-
+ +
reset
eco
°C
-
-
+ +
reset
eco
%
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