Atag XL75W - Adjustment on the Gas Valve (Step 3;3)

87
Commissioning
Flue gas analysis
Adjustment on the gas valve (Step 3/3)
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 85;
- First put engine 1 on full load (see
Step 1) and follow next steps;
- The O
2
/CO
2
values are set by using
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head screwdriver, on the screw
“3”. Please observe the following
rotating direction;
- Clockwise means more O
2
/
less CO
2
;
- Counterclockwise means less O
2
/
more CO
2
;
- Once done, repeat the steps above
for engine 2.
Legend
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probe
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3. Main throttle regulation
4. Pressure P-int
5. Pressure P-out
$IWHUWKLVVHWWLQJKDVEHHQPDGHRQFHPRUHWHVWWKH2
2
/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)*
O
2
4,8% 5,0%
CO
2
9,0% 10,5%
Values are valid with closed cover/air box. *only possible if LPG conversion kit is installed
1
5 2
34
Attention; close the venturi intake for the non-running engine (bare in mind
there is a 3 minute post purge time active).