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3.8
Connection to gas mains
DANGER
Before connecting the boiler to the gas mains, make sure that the gas type and the supply conditions correspond to the
specifications on the boiler technical data plate.
If this is not the case, do not connect the boiler to the gas mains.
Cross-section gas pipe size must be chosen depending on its length, layout pattern, gas flow rate.
Gas supply pipe cross-section must be equal or greater than boiler gas pipe.
DANGER
Comply with installation standards enforced in the country where the boiler is installed which are considered as fully transcribed
in this booklet.
Remember that before operating an indoor gas distribution system and before connecting it to a meter, it must be checked for
leaks.
If some system parts are not visible, the leak test is to be carried out before the pipes are covered.
Leak test is NOT to be carried out employing flammable gas: use air or nitrogen for this purpose.
Once gas is in the pipes, leak test by a naked flame is forbidden; use specific products available on the market.
When connecting the boiler to gas supply network, it is COMPULSORY to install an appropriately sized gasket (A) made from
suitable material (see Fig. 13 Connection to gas mains).
The boiler gas inlet coupling is NOT suitable for hemp, teflon tape or similarly made gaskets.
Fig. 13 Connection to gas mains
32
A
Instructions for the installer
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