Installation Regulations; Electric Connection - Beretta Mynute S 24 C.A.I.E Instrucciones De Instalacion Y Uso

ENGLISH

3 - INSTALLATION REGULATIONS

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 ap-
pliance 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 situ-
ated 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 build-
ing, away from sources of pollution. Indirect ventilation, with air
drawn from rooms next to the room in which the appliance is in-
stalled, is permitted, provided that the limitations indicated by cur-
rent local regulations. The room in which the boiler is to be installed
must be adequately ventilated in compliance with applicable leg-
islation. 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. Be-
fore fitting the exhaust outlet connector to the flue, check that the
flue has adequate draught and has no restrictions and that the ex-
hausts 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.
Mynute S 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 protec-
tions.
MINIMUM DISTANCES
In order to have access to the boiler to perform regular mainte-
nance operations, respect the minimum spaces foreseen for instal-
lation (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 pro-
tected with proper insulation.
IMPORTANT
Before installation, wash every system piping carefully in order to
remove any residues that may impair the operation of the appli-
ance.
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.
4
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 fitted as standard with an automatic anti-freeze sys-
tem 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 ac-
tive 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 cir-
cuit. The boiler component materials are resistant to ethylene gly-
col 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 (fig.
4-5) in the packaging. The position and size of the hydraulic con-
nections 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.

3.3 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 (AT) 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
- 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).
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 56 W (24
C.A.I. E) 54 W (28 C.A.I. E)(and complies with the standard EN
60335-1).
It is compulsory to carry out connection with an efficient 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 appli-
ance.
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 mm², with max. outside diameter 7 mm.