Wolf CGB-75 Installation And Operating Instructions Manual page 20

Gas connection
Only a licensed gas fitter may route the gas pipe
and make the gas connections. Close the gas
ball valve on the condensing boiler to pressure
test the gas pipe.
Remove all residues from the heating pipework
and the gas pipe prior to connecting the con-
densing boiler, particularly in older systems.
Prior to commissioning, test all gas pipes and
connections for leaks according to TRGI. Only
foaming leak detection sprays which are ap-
proved by the DVGW should be used.
Inappropriate installation or using unsuitable
components or assemblies may lead to gas
escaping, which results in a risk of poisoning
and explosion.
Install a gas ball valve with fire protection
in the gas supply line upstream of the Wolf
condensing boiler. Otherwise explosions may
occur if there is a fire. Size the gas supply pipe
in accordance with DVGW-TRGI regulations
[Germany].
Gas fittings on the appliance may only be pres-
sure-tested to a maximum of 150 mbar. Higher
pressure may damage the gas train, resulting in
a risk of explosion, asphyxiation or poisoning.
Close the gas ball valve on the gas condensing
centre to pressure test the gas pipe.
Mount the gas ball valve in an easily accessible
place.
- Prior to installation, ensure that the boiler corresponds to the
local gas type. The factory settings for the particular type of
gas can be obtained from the following table.
20
10. Installation
Fig.: Straight-through gas ball valve (accessory)
Table: Factory setting according to gas type
Not applicable for Austria/Switzerland
1)
Does not apply to Switzerland
2)
Natural gas E/H:
Ws = 11.4 -15.2 kWh/m = 40.9-54.7 MJ/m
3
Natural gas LL:
1)
Ws = 9.5 -12.1 kWh/m = 34.1-43.6 MJ/m
3
LPG P:
2)
Ws = 20.2 -21.3 kWh/m = 72.9-76.8 MJ/m
3
3
3
3
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