Beretta 20141085, Installation Manual

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2.8 Gas connections
The gas connection must be made respecting the installation reg-
ulations in force, and sized to ensure the correct gas delivery to the
burner.
Before making the connection, check that:
b
The gas type is suitable for the appliance
b
If the appliance needs to be adapted for use with another gas
fuel, contact your local Technical Assistance Centre to have
the necessary modifications made. These operations may not
be performed by the installer under any circumstances.
b
The piping is thoroughly clean
b
The gas meter's flow rate is capable of ensuring the simultane-
ous use of all the appliances connected to it. The appliance's
connection to the gas supply line must be carried out in ac-
cordance with the current regulations.
b
Intake pressure with the appliance in the off position has the
following reference values:
- powered by methane gas: optimal pressure 20 mbar
- powered by L.P.G.: optimal pressure 37 mbar
a
Do not use any fuels other than those provided under any cir-
cumstances.
While it is normal for the intake pressure to decrease while the appli-
ance is in operation, it is advisable to verify that no excessive pres-
sure fluctuations take place. In order to limit the extent of these types
of variations, the diameter of the gas supply line to be used must
be assessed based on the length and the pressure drops of the line
itself, from the meter to the thermal module.
b
If fluctuations in the gas distribution pressure are encountered,
it is recommended to install an appropriate pressure stabiliser
upstream of the appliance's gas intake. For G30 and G31 gas
supply, all the necessary precautions must be taken in order
to prevent the gas from freezing in the case of extremely low
outdoor temperatures.
If the gas distribution network contains solid particles, install a filter on
the fuel supply line. When selecting it, consider that pressure drops
due to the filter should be as low as possible.
b
On completion of the installation, check that all joints are
sealed.
2.9 Discharge of combustion products
The appliance is supplied as standard in B-type configuration (B23-
B23P-B53P), i.e. pre-fitted to suction air directly into the installation
room and may be converted into a C-type appliance with the use of
specific accessories. In this configuration, the appliance will suction
the air directly from outdoors, with the possibility of coaxial or dual
piping.
For flue gas extraction and the intake of combustion air, it is essential
to use only specific pipes for condensing boilers and ensure that they
are correctly connected, as shown in the instructions supplied with
the flue gas accessories.
b
Do not connect this appliance's flue gas extraction pipes with
those of other appliances, unless this is specifically authorised
by the manufacturer. Non-compliance with this precaution may
cause a build-up of carbon monoxide in the room where the
appliance is installed. This could jeopardise people's health
and safety.
b
For further information on flue gas extraction pipes for thermal
modules connected in a cascaded system, see Catalogue
and the instructions provided for the relevant accessories.
b
Ensure that combustion air (suction line air) is not contaminat-
ed by:
- waxes/chlorinated detergents
- chemical products based on swimming pool chlorine
- calcium chloride
- sodium chloride use to soften tap water
- refrigerant leaks
- paint or varnish removers
- chloridric acid/muriatic acid
- cements and glues
- anti-static softeners used in dryers
- chloride used for domestic or industrial applications as deter-
gent, whitener or solvent
- adhesives used to glue construction and other similar prod-
ucts.
b
To prevent contamination of the thermal module, do not install
suction line air intakes and gas flue extraction pipes near:
- dry-cleaners/laundry rooms and factories
- swimming pools
- metal processing plants
- beauty parlours
- fridge repair shops
- photo-processing facilities
- body-shops
- plastics manufacturing plants
- furniture workshops and manufacturing plants.