Wolf FGB-K Series Installation And Maintenance Instructions For Contractors page 54

Changing the gas type
(for operation with natural gas LL and LPG only)
Change the gas type for operation with natural
gas or LPG.
1. The gas boiler must be switched OFF. Close the
gas ball valve.
The boiler starts automatically when there is
Please note
a heat demand, even if the gas type has not
yet been correctly set.
2. Pull the plug from the gas combination valve
3. Undo the union nut fitting at gas combination valve
(A)
4. Remove screws (B) on the gas combination valve
5. Pull the gas combination valve downwards and
forwards, then remove it (C)
6. Remove gas restrictor (E) from rubber grommet
(D)
7. Insert the gas restrictor according to the table "Gas
restrictors".
8. Refit parts in reverse order, ensuring that all
gaskets are seated properly.
9. Open the gas ball valve.
10. Check the gas combination valve is gas-tight
11. Switch the gas boiler ON (button 5)
If the appliance is connected to a BM-2, the
operating mode key is disabled. The BM-2
takes over this function.
12. Set the gas type in the contractor level
(only for LPG).
• Call up the HG parameter list:
Press and hold (key 4) for 10 s
• Briefly press (key 4) again
• Select H12 via (key 1 or 2)
• Set the gas type according to the table
(via key 6 or 7)
• Exit contractor level (via key 4)
• Update the type plate.
Affix the label "Conversion to LPG" (included with
the LPG P conversion kit) next to the type plate.
If converted to natural gas LL, affix the label
"Conversion to natural gas LL" (included with the
documentation) next to the type plate.
13. Carry out the CO test
2
with open appliance – lower load
with open appliance – upper load
(see next page)
54
23. Changing the gas type
Fig: Changing the gas type
Gas
type
Natural
gas E/H
Natural
gas LL
LPG P
Table: Gas restrictors
Fig: Control unit buttons
Fig: HG parameter H12
A
E
D
C
Gas restrictor
28 kW 35 kW
One notch / green Three notches / white
(delivered condition) (delivered condition)
No gas restrictor No gas restrictor
Two notches / yellow Four notches / red
1
2
4
H 12
1 28 kW natural gas
2 28 kW LPG
3 35 kW natural gas
4 35 kW LPG
B
6
7
5
Type
3064458_201811