Electrical Connections; Gas Connection - Beretta CIAO AT Installer And User Manual

Connect the fi ttings and gaskets available from the catalogue as optional accessories.
We recommend connecting the boiler to the systems introducing both the DHW shut-off
valve as well as the shut-off valves for the heating system; for this purpose a heating system
valves kit and heating valves kit with fi lter is available.
Connect the brass taps and valves to the connections and the boiler.
M heating delivery
AC hot water outlet
G gas
R heating return line
AF cold water inlet
3.9

Electrical connections

The boiler leaves the factory completely wired with the power supply cable already electri-
cally connected; only the room thermostat (TA) needs to be connected to the dedicated
terminals. To access the terminal board:
- set the main system switch to OFF
- undo the casing mounting screws (A - fi g. 10)
- move the casing forward to release it from the frame
- undo the control panel mounting screws (B - fi g. 10)
- rotate the control panel towards you
- make the electrical connections using the M4 terminal located the electrical box cover
and referring to the diagram below.
S.E.
(Contatto privo di tensione)
-t°
Low voltage users:
rosa = pink
arancione = orange
S.E. = outdoor sensor
TA/OT+ = room thermostat - Opentherm
they must be connected to the M4 terminal on the cover
b
Room thermostat low voltage safety input. The connection to the mains supply must
be made via a separation device with an omnipolar opening of at least 3.5 mm (EN
60335-1, category III). The appliance works with alternating current at 230 Volt/50
Hz, and complies with Standard EN 60335-1.
b
It is compulsory to carry out connection with an effi cient earth circuit, according to
national and local legislation.
b
It is advisable to comply with neutral phase connection (L-N).
b
The earth wire must be a couple of centimetres longer than the others.
a
It is forbidden to use gas and/or water pipes to earth electrical appliances.
b
The manufacturer declines liability for any damage if the appliance was not
connected to an earth circuit.
b
If the power cable is damaged, it must be replaced by the manufacturer or by the
Technical Assistance Service or by a person with similar qualifi cations, in order to
avoid any risk.
If the power cable is replaced, use a cable of the HAR H05V2V2-F type, 3 x 0.75mm
max. outside diameter 7mm.
3.10

Gas connection

Before connecting the appliance to the gas network, check that:
- national and local installation regulations have been respected
- the gas type is appropriate for the appliance
- the piping is clean.
The gas pipe must be installed outdoors.
If the pipe has to pass through the wall, it must pass through the central opening in the lower
part of the template.
b
It is advisable to install a fi lter of suitable dimensions on the gas line if the distribution
network contains solid particles.
b
Once the appliance has been installed, check the connections are sealed according
to current installation regulations.
3.11 Releasing the circulator
- Press the MODE button to select the OFF state and switch off the boiler.
- Remove the circulator cap.
- With a fl at-bladed screwdriver, rotate the shaft, taking care not to damage the slot (fi g. 1).
- To remove the connector holder, lever with a screwdriver as shown in fi g. 2.
- Replace the cap and press MODE to select the type of operation desired.
3/4" M
1/2" M
3/4" M
3/4" M
1/2" M
TA / OT+
rosa
rosa
arancione
arancione
M4
b
Carry out the operation with extreme caution to avoid damaging the individual com-
ponents.
fi g. 1
3.12 Flue gas exhaust and combustion air intake (fi g. 11-12)
For the removal of combustion products, refer to the UNI 7129 and 7131 standards. Always
comply with local standards of the Fire Department, the Gas Company and with possible
municipal dispositions. Combustion products are removed by a centrifugal fan placed inside
the combustion chamber.
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. For fl ue gas extraction and the restoration of boiler combustion
air, it is essential to use only certifi ed pipes and ensure that the connection is made correctly
as indicated in the instructions supplied with the fl ue gas accessories.
A single fl ue can be connected to several appliances provided that every appliance is the
condensing type. The boiler is a C-type appliance (with airtight chamber), and must therefore
have a safe connection to the fl ue gas discharge pipe and to the combustion air suction pipe;
these both carry their contents outside, and are essential for the operation of the appliance.
Suction/discharge pipes length table
Concentric pipe Ø 60/100 mm
Concentric pipe Ø 80/125 mm
Twin pipe Ø 80 mm
Flue gas exhaust pipe Ø 80 mm
(type B22P-B52P)
b
The straight length includes the fi rst bend (connection to the boiler), endpieces and
joints. An exception is made for the vertical Ø 60-100 mm concentric pipe, whose
straight length excludes bends.
b
The maximum lengths of the pipes refer to the fl ue accessories available in the
catalogue.
b
The boiler automatically adjusts the ventilation according to the type of installation
2 , with
and the length of the
b
The use of specifi c piping is
b
Make sure the fl ue gas discharge pipe is tilted 3° towards the
b
Do not obstruct or choke the combustion air suction pipe in any
b
Non-insulated fl ue gas pipes are potential sources of
b
The concentric pipes can be fi tted in most suitable direction in relation to installation
requirements. For installation, follow the instructions supplied with the kits.
For the maximum lengths of single piping with Ø 80 mm, refer to the graph (fi g. 11).
fi g. 2
maximum
straight length air flange (Ø)
[m]
up to 0.85 84
0.85 to 3.5 not installed
up to 2 84
2 to 9 not installed
0.5 to 2 84
2 to 14 not installed
0.5 to 2 84
2 to 14 not installed
pipe.
mandatory.
danger.
ENGLISH
Pressure drop
Bend Bend
45° 90°
1.3 m 1.6 m
1 m 1.5 m
boiler.
way.
5