Conversion To Natural Gas E/Ll (G20/G25) (If Necessary) - Wolf CGB-75 Installation And Operating Instructions Manual

As delivered, the gas condensing boilers CGB-75/CGB-100 are equipped for operation with natural gas E/H (G20).
For operation with natural gas LL (G25), the gas restrictor must be replaced.
The necessary gas restrictor with the code number "1260" for operation with natural gas LL (G25) is included in the scope of delivery
and is attached to the gas pipe for use.
1)
1
2
Unplug the connector  (first unscrew the Phillips head
screws)
2)
Undo gas connection at the gas combination valve
3)
Unscrew the mixing chamber from the fan (three Allen screws 5
mm), and remove air inlet pipe if necessary
Re-assemble in reverse order.
Note: During the conversion from LPG to natural gas, the gas combination valve and the flue gas orifice plate (see page 24/25)
must be removed prior to assembly.
3062555_201804
14. Conversion to natural gas E/LL
(G20/G25) (if necessary)
4)
5)
6)
4 x screws
SW8
Undo the gas combination valve from the mixing chamber
for gas/air (four SW8 screws).
Gas restrictor
Remove integral gas restrictor and replace with the gas
restrictor for the new gas type (in accordance with the
table on page 25).
O-ring
After assembly of the gas restrictor, gas combination valve
and air inlet pipe, push the O-ring lubricated with silicone
grease into the packing groove of the fan and refit the
mixing chamber.
29