Determining/Changing The Gas Type - Wolf CGB-2 Series Installation Instructions For Contractors

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.
Gas categories and supply pressures
Country
DE
AT
BE
ES, IE
FR
FR
BA, BY
DK, EE, FI, GB, GR, HR, IT, LT, NO, PT, RO,
RU, SE, SI, TR
BG, CZ, IS, ME, RS, SK, UA
CH
CY
CY
HU, NL
NL
LU, LV, MT
PL
If the supply pressure is outside the specified 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.
58
28. Determining/changing the gas type
Table: Wobbe index in relation to gas type
Appliance category
Natural LPG
gas
II2N3P
II2H3P
I2N I3B/P
II2N3+
II2N3B/P
II2N3B/P
II2N3P
II2N3B/P
II2N3B/P
II2N3B/P
I3B/P
I3B/P
II2H3B/P
II2N3B/P, II2EK3B/P
I2N
II2E Lw3B/P, II2N3B/P
Natural gas E/H 15.0:
W = 11.4 - 15.2 kWh/m³ = 40.9 - 54.7 MJ/m³
S
Natural gas LL 12.4:
1)
W = 9.5 - 12.1 kWh/m³ = 34.1 - 43.6 MJ/m³
S
LPG B/P
W = 20.2 - 24.3 kWh/m³ = 72.9 - 87.3 MJ/m³
S
not applicable to Austria/Switzerland
1)
Supply pressure in mbar
Natural gas
Nom. Min. Max.
20 18
20 18
20/25 18
20 18
20/25 18
20/25 18
20 18
20 18
20 18
20 18
25 18
25 18
20 18
20 18
LPG
Nom. Min. Max.
25 50 42.5 57.5
25 50 42.5 57.5
30 30 25 35
28-30 25 35
25
37 25 45
30 30 25 35
30 50 42.5 57.5
25 37 25 45
25 30 25 35
25 37 25 45
25 50 42.5 57.5
30 25 35
50 42.5 57.5
30 30 25 35
30 30 25 35
25
25 30 25 35
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