Beretta Mynute S 24 C.A.I. E Manuel D'installation Et D'utilisation page 8

ENGLISH
USER
1A GENERAL WARNINGS
The instruction manual is an integral part of the product and it must
therefore be kept carefully and must accompany the appliance; if
the manual is lost or damaged, another copy must be requested
from the Technical Assistance Service.
Boiler installation and any other assistance and maintenance
operation must be carried out by qualified personnel accord-
ing to current local and national regulations.
For installation, it is advisable to contact specialised person-
nel.
The boiler must only be used for the application foreseen by
the manufacturer. The manufacturer shall not be liable for
any damage to persons, animals or property due to errors in
installation, calibration, maintenance or due to improper use.
The safety and automatic adjustment devices must not be
modified, during the system life cycle, by the manufacturer or
supplier.
This appliance produces hot water, therefore it must be con-
nected to a heating system and/or a domestic hot water
mains, compatible with its performance and output.
In case of water leakage, close the water supply and contact
the Technical Assistance Service immediately.
In case of absence for long periods time, close the gas sup-
ply and switch off the electrical supply main switch. In case of
risk of frost, empty the boiler.
From time to time check that the operating pressure of the
hydraulic system does not decrease under 1 bar.
In case of failure and/or malfunctioning, deactivate the appli-
ance, and do not try to repair or intervene directly on it.
Appliance maintenance must be carried out at least once a
year: program it with the Technical Assistance Service will
avoid wasting time and money.
The ventilation openings are vital for correct combustion.
Boiler use requires to strictly observe some basic safety rules:
Do not use the appliance in any manner other than its in-
tended purpose.
It is dangerous to touch the appliance with wet or damp body
parts and/or in bare feet.
Under no circumstances cover the intake grids, dissipation
grids and ventilation vents in the installation room with cloths,
paper or any other material.
Do not activate electrical switches, telephone or any other
object that causes sparks if there is a smell of gas. Ventilate
the room by opening doors and windows and close the gas
central tap.
Do not place anything in the boiler.
Do not perform any cleaning operation if the appliance is not
disconnected from the main power supply.
Do not cover or reduce ventilation opening of the room where
the generator is installed.
Do not leave containers and inflammable products in the in-
stallation room.
Do not attempt to repair the appliance in case of failure and/
or malfunctioning.
It is dangerous to pull or twist the electric cables.
Children or unskilled persons must not use the appliance.
Do not intervene on sealed elements.
Do not cover or reduce the size of the ventilation openings in
the room where the boiler is installed. The ventilation open-
ings are vital for correct combustion.
For better use, remember that:
- a periodic external cleaning with soapy water not only improves
its aesthetic aspect but also preserves panelling from corrosion,
extending its life cycle;
- if the wall-mounted boiler is enclosed in pendant furniture, leave
at least 5 cm for ventilation and maintenance;
8
- installation of an room thermostat will favour a greater comfort, a
more rational use of the heat and energy saving; the boiler can
also be connected to a programming clock in order to manage
ignition and switching off during the day or week.
2A IGNITION
First ignition must be carried out by personnel from the Technical
Assistance Service. At the same time, if it is necessary to put the
appliance in service again, carefully follow the described operations.
To start-up the boiler it is necessary to carry out the following op-
erations:
- power the boiler
- open the gas tap present in the system to allow fuel flow
- turn the mode selector (3 fig. 1a) to the desired position:
Summer mode: turning the selector to the symbol summer
(fig. 2a) the traditional function of only domestic hot water is acti-
vated. If there is a domestic hot water request the digital display
shows the hot water system temperature, the icon to indicate the
hot water supply and the flame icon
Winter mode: by turning the mode selector within the area
marked + and - (fig. 2b), the boiler provides domestic hot water
and heating. If there is a heat request, the boiler switches on and
the digital monitor indicates the heating water temperature, the
icon to indicate heating and the flame icon (fig. 3a). If there is a
domestic hot water request, the boiler switches on and the digital
display shows the hot water system temperature, the icon to indi-
cate the hot water supply and the flame icon (fig. 4a)
Pre-heating (faster hot water): rotate the domestic hot water
temperature adjustment knob (4 - fig. 1a) to the
5a), to activate the pre-heating function. This function keeps the
water in the domestic hot water exchanger hot, to reduce stand-
by times when a request is made. When the pre-heating function
is enabled, the monitor indicates the delivery temperature of the
heating water or the domestic hot water, according to the current
request. During burner ignition following a pre-heating request,
the monitor indicates the
To deactivate the pre-heating function, rotate the domes-
tic hot water temperature adjustment knob back to the
symbol. Bring the domestic hot water temperature adjust-
ment knob back to the required position. This function cannot be
activated when the boiler is OFF: function selector (3 fig.1a) on
OFF.
- Adjust the room thermostat to the required temperature (~20°C)
Adjustment of domestic hot water temperature
To adjust domestic water temperature (bathrooms, showers, kitch-
en, etc.), turn the knob with symbol
marked + and -.
The boiler is standby status until, after a heat request, the burner
switches on and the digital display shows the hot water system
temperature, the icon to indicate the hot water supply and the flame
icon.
The boiler will be in function until the adjusted temperature is
reached, afterwards it will be in "standby" again.
Environment Automatic
(S.A.R.A.) fig. 7a
By setting the heating water temperature selector to the area
marked by AUTO - temperature value from 55 to 65°C - the
S.A.R.A. self-adjusting system is activated: the boiler varies the
delivery temperature according to the closing signal of the room
thermostat. When the temperature set with the heating water tem-
perature selector is reached, a 20 minutes count begins. If during
this period the room thermostat still requests heat, the value of the
set temperature automatically increases by 5 °C.
When the new value is reached, other 20 minutes count begins.
If during this period the room thermostat still requests heat, the
value of the set temperature automatically increases by 5 °C.
This new temperature value is the result of the temperature set
manually with the heating water temperature selector and the in-
crease of +10 °C of the S.A.R.A function. After the second cycle the
temperature value should be kept at the set value +10°C until the
request of the room thermostat is satisfied.
symbol (fig.
symbol (fig. 5b).
(fig. 2b) within the area
Adjustment System Function