Gas Connection - Wolf MGK-2-390 Installation Instructions Manual

Gas connection R2"
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13. Gas connection

With the power supply disconnected, connect the gas supply line to gas connection
R2" at the gas connection or the expansion joint (recommended) using the approved
sealant.
Routing the gas pipe and making the gas connections must only be
carried out by a licensed gas fitter.
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 fire protection in the gas supply line upstream
of the Wolf condensing boiler. Otherwise explosions may occur during a
fire. Size the gas supply line in accordance with DVGW-TRGI regulations.
Check the gas line for tightness without the boiler. Never release 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 train,
resulting in a risk of explosion, suffocation or poisoning. Close the
gas ball valve on the gas condensing boiler to pressure test the gas
line.
Mount the gas ball valve in an easily accessible place.
• Prior to installation, ensure that the boiler is set to the available gas type.
At the factory, the boiler is set up for natural gas E/H 15.0:
Ws = 11.4 - 15.2 kWh/m3 = 40.9 - 54.7 MJ/m
Only commission the appliance when the rated supply pressure has been reached.
If the supply pressure for natural gas (flow pressure) lies outside the
Caution
18 to 25 mbar range, adjustments must not be carried out and the boiler
must not be put into operation.
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