Conversion To Other Gas Types - Wolf CGB-75 Installation And Technical Manual

The gas condensing boilers CGB-75/CGB-100 are equipped as part of the standard delivery for operation with natural gas H
(G20).
For operation with LPG (G31), the gas restrictor must be replaced.
1)
1
2
Unplug the connector   (first undo Phillips head
screws)
2)
Undo gas connection at the gas combination valve
3)
Undo the mixing chamber from the ventilator (three
Allen screws 5 mm), and remove air inlet pipe where
necessary
Re-assemble in reverse order.
Note: During conversion from LPG to natural gas, the flue gas orifice plate (see Conversion to LPG, point 9, page 24) must
be removed prior to assembly.
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Conversion to other gas types

(if required)
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 the fitted gas restrictor and replace it with the gas
restrictor designated for LPG (G31).
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.
23