Determining The Gas Type - Wolf FGB-K Series Installation And Maintenance Instructions For Contractors

Setting the gas/air mixture
Carry out the adjustments in the order
Please note
described below. The gas combination
valve has been set at the factory to the gas
type specified on the type plate. Only adjust
the gas combination valve after the system
has been changed to a different gas type.

Determining the gas type

The gas condensing boiler is equipped with a
pneumatic gas/air mixing facility. In the delivered
condition the boiler is set to natural gas E/H.
For operation with natural gas LL remove the gas
restrictor.
For operation with LPG P, replace the gas restrictor as
indicated in the table "Gas restrictors".
1. Request information regarding the gas type and
Wobbe index from your local gas supply utility or
LPG supplier.
2. For operation with natural gas LL and LPG P,
match the gas restrictor.
3. Enter the gas type in the commissioning report.
4. Open the gas ball valve.
Gas categories and supply pressures
Country of destination
DE
AT, LU
BE
BE
BE
BE
FR
FR
PL
TR
DK,EE, SI,
RO,MO,BG,CN,FI,NO,SE
CZ, IT,ES,GR,TR,HR,IE,SI
LT,LV,NO,PT,SE
CH,CZ,ES,GB,NO,SE
RU
UA
HU
HU
NL
NL
If the supply pressure is outside the specified range, no adjustments may be carried out and the boiler must not be started.
52
21. Determining the gas type
Appliance category
Natural
LPG
gas
II2ELL3P
II2H3P
I2ER
I2ES
I3P
I3P
II2Esi3P
II2Esi3P
II2ELw3P
II2H3P
II2H3P
II2H3P
II2H3P
II2H3P
II2H3P
II2H3P
II2H3P
II2L3P, II2EK3P
II2L3P, II2EK3P
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:
W = 9.5 - 12.1 kWh/m³
S
LPG P
W = 20.2 - 21.3 kWh/m³ = 72.9 - 76.8 MJ/m³
S
not applicable in Austria / Switzerland
1)
Table: Wobbe index subject to gas type
Supply pressure in mbar
Natural gas
nom. min max
20 18 25
20 18 25
20/25 18 30
20/25 18 30
20/25 17 25
20/25 17 30
20 18 25
20 18 25
20 18 25
20 18 25
20 18 25
20 13 25
20 13 25
20 18 25
20 18 25
25 18 30
25 18 30
1)
= 34.1 - 43.6 MJ/m³
LPG
nom. min
50 42,5
50 42,5
37 25
50 42,5
37 25
50 42,5
37 25
30/37 25
30 25
37 25
50 42,5
30 25
50 42,5
37 25
37 25
50 42,5
30/37 25
50 42,5
3064458_201811
max
57,5
57,5
45
57,5
45
57,5
45
45
35
45
57,5
35
57,5
45
45
57,5
45
57,5