Installation Regulations; Electric Connection - Beretta Ciao 24 C.A.I. e Instrucciones De Instalacion Y Uso

3 - INSTALLATION REGULATIONS

This natural draught boiler is intended to be connected only to
a flue shared between multiple dwellings in existing buildings
that evacuates the residues of combustion to the outside of
the room containing the boiler. It draws the combustion air
directly from the room and incorporates a draught diverter.
Due to lower efficiency, any other use of this boiler shall be
avoided and would result in higher energy consumption and
higher operating costs.
3.1 Installation regulations
Installation must be carried out by qualified personnel.
Always comply with national and local regulations.
POSITION
Class B appliances cannot be installed in bedrooms, bathrooms or
showers, or in rooms with open flues without adequate ventilation.
It is imperative that the room in which a gas appliance is installed
has a sufficient inflow of air to supply the quantity of air necessary
for normal combustion and ensure proper ventilation of the room
itself. Natural direct ventilation with external air must be provided
for via:
- permanent openings in the walls of the room in which the
appliance is installed leading outdoors. These openings must be
made in such a way as to ensure that the orifices on both the
internal and external side of the wall cannot be obstructed or
be reduced in effective diameter, the orifices themselves must
be protected with metal grilles or similar means and must be
situated near floor level and in a location that does not interfere
with the function of the flue exhaust system (where this position
is not possible, the diameter of the ventilation openings must be
increased by at least 50%),
- while single or multiple branched the ventilation ducts may be
used.
The ventilation air must be sourced directly from outside the
building, away from sources of pollution. Indirect ventilation, with
air drawn from rooms next to the room in which the appliance
is installed, is permitted, provided that the limitations indicated
by current local regulations. The room in which the boiler is to
be installed must be adequately ventilated in compliance with
applicable legislation. Detailed prescriptions for the installation
of the flue, gas piping and ventilation ducting are given in current
local regulations. The aforementioned regulations also prohibit the
installation of electric fans and extractors in the room in which the
appliance is installed. The boiler must have a fixed outward leading
exhaust duct with a diameter not smaller than the exhaust hood
collar. Before fitting the exhaust outlet connector to the flue, check
that the flue has adequate draught and has no restrictions and that
the exhausts of no other appliances are connected to the same
flue pipe. When connecting to a pre-existing flue pipe, check that
the latter is perfectly clean, as deposits may detach from the wall
of the pipe during use and obstruct the passage of the flue gases,
creating a situation of severe danger for the user.
CIAO e can be installed indoors (fig. 2).
The boiler has protection that guarantees correct operation with a
temperature range from 0°C to 60°C.
To take advantage of protections, the appliance must be able to
start up, since any lockout condition (for example, absence of gas or
electrical supply, or safety intervention) deactivates the protections.
MINIMUM DISTANCES
In order to have access to the boiler to perform regular maintenance
operations, respect the minimum spaces foreseen for installation
(fig. 3).
For correct appliance positioning:
- do not place it on a cooker or other cooking device
- do not leave inflammable 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
overpressure 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
elements must be airtight.
ANTI-FREEZE SYSTEM
The boiler is fitted 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
deactivates 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 specific, 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
circuit. The boiler component materials are resistant to ethylene
glycol based anti-freeze liquids.
3.2 Cleaning the system and characteristics of the
heating circuit water
In the case of a new installation or replacement of the boiler, it
is necessary to clean the heating system. To ensure the device
works well, top up the additives and/or chemical treatments (e.g.
antifreeze liquids, filming agents, etc.) and check the parameters in
the table are within the values indicated.
unit of
Parameters
measurement
pH value -
Hardness °F
Appearance -
Fe mg/kg
Cu mg/kg
3.3 Securing the boiler to the wall and hydraulic
connections
To fasten the boiler to the wall, use the cardboard template (fig.
4-5) in the packaging. The position and size of the hydraulic
connections are indicated below:
A CH return 3/4"
B CH delivery 3/4"
C gas connection 3/4"
D DHW output 1/2"
E DHW input 1/2"
In case of replacement of Beretta boilers from previous type, there
is an adaptation kit of hydraulic connections available.

3.4 Electric connection

The boilers leave the factory completely wired with the power cable
already connected and they only need the connection of the room
thermostat (T.A.) to be carried out in the specific terminals.
To access the terminal board:
- turn off the system general switch
- undo the fixing screws (A) of the shell (fig. 6)
- move forward and then upwards the shell base to unhook it from
the chassis
- undo the fixing screws (B) of the instrument panel (fig. 7)
- turn the instrument panel upside down
- remove the terminal board cover (fig. 8)
- insert the cable of the possible T.A. (fig. 9)
The room thermostat must be connected as indicated on the wiring
diagram.
Room thermostat input in safety low voltage (24 Vdc).
CIAO C.A.I. e
Hot water Filling
circuit water
7-8 -
- <15
- clear
0,5 -
0,1 -
5