Gas Connection - Wolf CGS-2-14/120L Installation Instructions Manual

With the power supply disconnected, connect the gas supply
pipe to the gas connection at a 90° angle and connect the
flexible gas hose to gas connection R½". Use an approved
sealant.
Only a licensed gas fitter may route the gas pipe
and make the gas connections.
Remove all residues from the heating pipework
and the gas line prior to connecting the con-
densing boiler, particularly in older systems.
Prior to commissioning, test all gas pipes and
connections for leaks. Inappropriate installation
or the use of unsuitable components or assem-
blies may lead to gas escaping, resulting in a
risk of poisoning and explosion.
Install a gas ball valve with fire protection in the
gas supply pipe upstream of the condensing
boiler. Otherwise explosions may occur during a
fire. Size the gas supply pipe in accordance with
DVGW-TRGI regulations [Germany].
Mount the gas ball valve in an easily acces-
sible place.
Carry out a tightness test on the gas line
without the gas condensing boiler. Never re-
lease the test pressure via the gas valve.
Gas fittings on the appliance should be
pressure tested to a maximum of 150 mbar.
Higher pressure may damage the gas valve,
resulting in a risk of explosion, asphyxiation
and poisoning. Before pressure testing the
gas line, close the gas ball valve on the gas
condensing boiler.
When installing the gas connection, ensure
all fittings are sufficiently tightened to pre-
vent gas leaks.
Installing the gas line
Only DVGW or DINDVGW-approved sealant,
Please
e.g. non-woven tapes, pastes, PTFE tape may
note
be used.
Use approved sealant to seal the R½" elbow from the
installation set at the gas connection of the appliance.
Screw in the threaded part of the stainless steel corrugated
hose and seal it to the conical threaded connection on the R½"
elbow using an approved sealant.
When installing the hose, ensure that the sealing ring
between the stainless steel corrugated hose (flange) is
always inserted before the union nut is tightened on the
threaded part.
First loosely tighten the union nut, check the gas hose for
torsion-free alignment and then tighten securely.
24
12. Gas connection
Fig.: Gas ball valve, straight (accessory)
Fig.: Gas ball valve, angled (accessory)
Fig.: Gas connection installation
When tightening, counterhold with an open-ended spanner
to avoid torsion.
The bending radius must not be less than 20 mm.
Subject to the design of the hose, carry out checks at suitable
intervals.
After installation and inspection have been performed, in-situ
tightness tests may, for corrosion protection reasons, only be
carried out using a DVGW-tested spray medium to EN 14291.
Afterwards, wipe the gas line dry.
After opening the threaded parts, always insert a new gasket
and carry out a tightness test.
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Gaskugelhahn, Durchgangsform
Gaskugelhahn, Eckform
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