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Fig: Gas ball valve, straight (accessories)
Fig: Gas ball valve, angled (accessories)
Fig: Gas connection installation
Seite 16
Gaskugelhahn, Durchgangsform
Connect the gas supply line at the gas connection or the
expansion joint (recommended) using gas connection
R½" and an approved sealant. Ensure the supply line is
stress-free.
Only a licensed gas tter 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
condensing boiler, particularly in older systems.
Prior to commissioning, test all pipe and gas
connections for leaks. 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 re protection in the
gas supply line upstream of the condensing
boiler. This prevents a risk of explosion during a
re. Size the gas supply line in accordance with
DVGW-TRGI regulations.
Mount the gas ball valve in an easily
accessible place.
Carry out a tightness test on the gas line
without the gas condensing boiler. Never
release the test pressure via the gas valve.
Gas ttings 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
or poisoning. When pressure testing the
gas line, close the gas ball valve on the gas
condensing boiler.
When installing the gas connection, ensure
all ttings are sufciently tightened to
prevent gas leaks.
11. Gas connection
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