Gas Connections; Discharge Of Combustion Products - Beretta POWER MAX 50 P DEP Installation And Operation Manual

2 9 Gas connections

The gas connection must be made respecting the instal-
lation regulations 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 As-
sistance 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
simultaneous use of all the appliances connected to
it. The appliance's connection to the gas supply line
must be carried out in accordance 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 35 mbar
b
Check that the pressure never falls below 15 mbar
a
Do not use any fuels other than those provided under
any circumstances.
While it is normal for the intake pressure to decrease while
the appliance is in operation, it is advisable to verify that
no excessive pressure fluctuations take place. In order to
limit the extent of these types of variations, the diameter of
22
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 en-
countered, it is recommended to install an appropri-
ate pressure stabiliser upstream of the appliance's
gas intake. For G30 and G31 gas supply, all the nec-
essary 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, in-
stall a filter on the fuel supply line. When selecting it, con-
sider 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.
GAS 1" M
2 10 Discharge of combustion
products
The appliance is supplied as standard in B-type configu-
ration (B23-B23P-B53P), i.e. pre-fitted to suction air direct-
ly 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 extrac-
tion 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
contaminated by:
- waxes/chlorinated detergents
- chemical products based on swimming pool chlo-
rine
- 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 detergent, whitener or solvent
- adhesives used to glue construction and other sim-
ilar products.
b
To prevent contamination of the thermal module, do
not install suction line air intakes and gas flue extrac-
tion 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.