Wolf CGB-2-24 - Gas Type and Combustion Checks; Determining and Changing Gas Type

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28.Determining/changingthegastype
Determiningthegastype
The condensing boiler is equipped with electronic com-
bustion control which regulates the gas-air-ratio in ac-
cordance with the prevailing gas quality and so provides
optimum combustion.
1 Request information regarding the gas type and
Wobbe index from your local gas supply utility or
LPG supplier.
2. Change the gas type for operation with LPG
(see "Changing the gas type").
3. Enter the gas type in the commissioning report.
4. Open the gas ball valve.
NaturalgasE/H15.0:
W
S
= 11.4 - 15.2 kWh/m³ = 40.9 - 54.7 MJ/m³
NaturalgasLL12.4:
1)
W
S
= 9.5 - 12.1 kWh/m³ = 34.1 - 43.6 MJ/m³
LPG B/P
W
S
= 20.2 - 24.3 kWh/m³ = 72.9 - 87.3 MJ/m³
1)
not applicable to Austria/Switzerland
Table: Wobbe index in relation to gas type
Gascategoriesandsupplypressures
Country Appliancecategory Supplypressureinmbar
Natural
gas
LPG Naturalgas LPG
Nom. Min. Max. Nom. Min. Max.
DE II2N3P 20 18 25 50 42.5 57.5
AT II2H3P 20 18 25 50 42.5 57.5
BE I2N I3B/P 20/25 18 30 30 25 35
ES, IE
II2N3+ 20 18 25
28-30 25 35
37 25 45
FR II2N3B/P 20/25 18 30 30 25 35
FR II2N3B/P 20/25 18 30 50 42.5 57.5
BA, BY II2N3P 20 18 25 37 25 45
DK, EE, FI, GB, GR, HR, IT, LT, NO, PT, RO,
RU, SE, SI, TR
II2N3B/P 20 18 25 30 25 35
BG, CZ, IS, ME, RS, SK, UA II2N3B/P 20 18 25 37 25 45
CH II2N3B/P 20 18 25 50 42.5 57.5
CY I3B/P 30 25 35
CY I3B/P 50 42.5 57.5
HU, NL II2H3B/P 25 18 30 30 25 35
NL
II2N3B/P, II2EK3B/P
25 18 30 30 25 35
LU, LV, MT I2N 20 18 25
PL II2E Lw3B/P, II2N3B/P 20 18 25 30 25 35
Ifthesupplypressureisoutsidethespeciedrange,adjustmentsmustnotbecarriedoutandtheboilermustnotbestarted.
Gas categories of group "N" indicate a self-calibrating system (automatic matching to all gases of family 2; this includes natural
gas E, H, L, LL) to DIN EN 437.