58
IMPORTANT
► A deviation at maximum output cannot
be corrected by adjusting the gas
valve. In that case, the boiler must be
meticulously inspected for gas density
and correctness of components used
(especially the gas restriction ring and
the fan including venturi).
Value limits
Gas category
Natural gas
G20
LPG
G31
O
2
[%] O
2
[%]
Upper limit 5.60 6.05
Lower limit 3.85 4.50
Table 2a: Allowed O
2
(H) limits at maximum output (open casing)
Value limits
Gas category
Natural gas
G20
LPG
G31
CO
2
[%] CO
2
[%]
Upper limit 9.6 10.8
Lower limit 8.6 9.8
Table 2b: Allowed CO
2
(H) limits at maximum output (open casing)
J. Then perform the measurement at minimum output (see
§8.10.2).
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