Gas Connection; Electric Connection - Beretta CIAO S 20 C.S.I. Manuel D'utilisation

ENGLISH
- do not place it on a cooker or other cooking device
- do not leave infl ammable products in the room where the boiler is
installed
- heat sensitive walls (for example, wooden walls) must be protected
with proper insulation.
IMPORTANT
Before installation, wash every system piping carefully in order to
remove any residues that may impair the operation of the appliance.
Under the safety valve, install a water collecting funnel with the
corresponding discharge in the event of leaks due to the overpres-
sure of the heating system. The domestic hot water circuit does not
need a safety valve, but make sure that the pressure of waterworks
does not exceed 6 bar. In case of doubts, install a pressure reducer.
Prior to ignition, make sure that the boiler is designed to operate
with the gas available; this can be checked by the message on the
packaging and the adhesive label indicating the gas type.
It is very important to highlight that in some cases the smoke pipes
are under pressure and therefore, the connections of several ele-
ments must be airtight.
ANTI-FREEZE SYSTEM
The boiler is fi tted as standard with an automatic anti-freeze system
that activates when the temperature of the water in the primary
circuit falls below 6 °C. This system is always active, guaranteeing
boiler protection to an outdoor temperature level of -3 °C. To take
advantage of this protection (based on burner operation), the boiler
must be able to switch itself on; any lockout condition (e.g. lack of
gas/electricity supply, or safety device intervention) therefore deac-
tivates the protection.
The anti-freeze protection is also active when the boiler is on standby.
In normal operation conditions, the boiler can protect itself against
freezing. If the machine is left unpowered for long periods in areas
where temperatures may fall below 0 °C, and you do not want to
drain the heating system, you are advised to add a specifi c, good
quality anti-freeze liquid to the primary circuit. Carefully follow the
manufacturer's instructions with regards not only the percentage of
anti-freeze liquid to be used for the minimum temperature at which
you want to keep the machine circuit, but also the duration and
disposal of the liquid itself.
For the domestic hot water part, we recommend you drain the cir-
cuit. The boiler component materials are resistant to ethylene glycol
based anti-freeze liquids.
3.2 Securing the boiler to the wall and hydraulic connections
To fasten the boiler to the wall, use the cardboard template (fi g.
4-5) in the packaging. The position and size of the hydraulic con-
nections are indicated below:
A CH return
B CH delivery
C

gas connection

D DHW output
E DHW input
In case of replacement of Beretta boilers from previous type, there
is an adaptation kit of hydraulic connections available.

3.3 Electric connection

The boilers leave the factory completely wired with the power cable
already connected and they only need the connection of the ambient
thermostat (AT) to be carried out in the specifi c terminals.
To access the terminal board:
- turn off the system general switch
- undo the fi xing screws (A) of the shell (fi g. 6)
- move forward and then upwards the shell base to unhook it from the
chassis
- undo the fi xing screws (B) of the instrument panel (fi g. 7)
- turn the instrument panel upside down
- remove the terminal board cover (fi g. 8)
- insert the cable of the possible T.A. (fi g. 9)
The ambient thermostat must be connected as indicated on the
wiring diagram.
Ambient thermostat input in safety low voltage (24 Vdc).
4
3/4"
3/4"
3/4"
1/2" (for C.S.I.) - 3/4" (for R.S.I.)
1/2" (for C.S.I.) - 3/4" (for R.S.I.)
The connection to the mains supply must be carried out through a
separation device with an omnipolar opening of at least 3.5mm (EN
60335-1, category III).
The appliance operates with an alternating current of 230 Volt/50 Hz
and an electrical power of 100W for 20 C.S.I. - 115W for 24 C.S.I.
and 24 R.S.I. (and complies with the standard EN 60335-1).
It is compulsory to carry out connection with an effi cient earth
circuit, according to national and local legislation.
It is advisable to comply with neutral phase connection (L-N).
The earth wire must be a couple of centimetres longer than the
others.
Do not use gas and/or water pipes to earth electrical ap-
pliance.
The manufacturer declines liability for any damage if the appliance
was not connected to an earth circuit.
Use the power cable supplied to connect the boiler to the mains power
supply.
If the power cable is replaced, use a cable type HAR H05V2V2-F,
3 x 0.75 mm 2 , with max. outside diameter 7 mm.
3.4 Gas connection
Before connecting the appliance to the gas network, check that:
- national and local regulations are complied
- the gas type is the one suitable for the appliance
- the piping is clean.
The gas pipe must be installed outdoor. If the pipe goes through
the wall, it must go through the central opening, in the lower part
of the template.
It is advisable to install a fi lter of suitable dimensions on the gas line
if the distribution network had solid particles.
Once the appliance has been installed check that connections are
sealed according to current installation regulations
3.5 Fumes exhaustion and air suction
For fumes exhaustion, refer to the current local and national regula-
tions. Always comply with local standards of the Fire Department,
the Gas Company and with possible municipal dispositions.
The release of combustion products is assured by a centrifugal fan
placed inside the combustion chamber and its correct operation
is constantly checked by a pressure switch. The boiler is supplied
without the fl ue gas outlet/air suction kit, since it is possible to use
the accessories for appliance with a forced draught sealed chamber
that better adapts to the installation characteristics.
It is essential for fl ue gas release and the restoration of boiler com-
bustion air to use certifi ed pipes and that connection is carried out
correctly as indicated by the instructions supplied with the fl ue gas
accessories.
With only one smoke pipe you can connect more pieces of appli-
ance provided that every piece of appliance is sealed chamber type.
"FORCED OPEN" INSTALLATION (TYPE B22P/B52P)
Fumes outlet duct Ø 80 mm (fi g. 10a)
The fumes outlet duct can be aimed in the most suitable direction for
installation needs. To install follow the instructions supplied with the kit.
In this confi guration, the boiler is connected to the Ø 80 mm
fumes outlet duct by means of a Ø 60-80 mm adaptor.
In this case, the combustion supporting air is taken from the
room in which the boiler is installed, which must be a suitable
and ventilated technical room.
Non-insulated fumes outlet ducts are potential sources of
danger.
When necessary, the fl ue gas fl ange (F) must be removed using a
screwdriver as a lever.
The boiler automatically adapts ventilation according to the type of
installation and the length of the duct.
20 C.S.I.
Pipe length
ø 80 [m]
up to 1,5
from 1,5 to 5
from 5 to 14
(**) fi tted in boiler
Load losses for each
Flue gas
bend (m)
fl ange (F)
45°
Ø 39
1,2
Ø 41 (**)
Ø 43
90°
1,7