User Guide; Switching On The Appliance; Switching Off - Beretta MYNUTE GREEN 50 R.S.I. Manuel D'utilisation

USER GUIDE

1A GENERAL WARNINGS AND SAFETY
The instruction manual is an integral part of the product and it must there-
fore 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 opera-
tions must be carried out by qualified personnel according to the
provisions of local legislation.
For installation, it is advisable to contact specialised personnel.
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, calibra-
tion, 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 connected
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 supply and
switch off the electrical supply main switch. If there is a risk of frost,
drain the boiler.
From time to time check that the operating pressure of the hydraulic
system does not go below 1 bar.
In case of failure and/or malfunctioning, deactivate the appliance,
and do not try to repair or operate directly on it.
Appliance maintenance must be carried out at least once a year:
scheduling it with the Technical Assistance Service will avoid wasting
time and money.
Boiler use requires strict observation of some basic safety rules:
Do not use the appliance in any manner other than its intended
purpose.
It is dangerous to touch the appliance with wet or damp body parts
and/or when barefoot.
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 use electrical switches, telephone or any other object that
causes sparks if there is a smell of gas. Ventilate the room by open-
ing doors and windows and close the central gas tap.
Do not place anything in the boiler.
Do not perform any cleaning operation if the appliance is not discon-
nected from the mains 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 installation
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 carry out operations on sealed elements.
For better use, remember that:
- periodic external cleaning with soapy water not only improves its appear-
ance but also preserves panelling from corrosion, extending its life cycle;
- if the wall-mounted boiler is enclosed in a hanging unit, leave at least 5
cm for ventilation and maintenance;
- installation of a room thermostat will greatly improve comfort, a more
rational use of the heat and energy saving; the boiler can also be con-
nected to a programmable timer in order to control the switching on and
off of the appliance during the day or week.
2A SWITCHING ON THE APPLIANCE
Every time the appliance is powered up, a series of data is shown on the
display including the flue gas sensor meter reading (-C- XX) (see para-
graph 4A - fault A09); the automatic purge cycle then starts, lasting around
2 minutes. During this phase, the three LEDs light up alternately and the
symbol is shown on the monitor (fig. 36).
To start up the boiler it is necessary to carry out the following operations:
- power the boiler
- open the gas tap to allow the flow of fuel
12
- set the room thermostat to the required temperature (~20°C)
- turn the mode selector to the desired position:
Winter mode: turning the function selector (fig. 38) within the area marked
+ and -, the boiler supplies hot water for heating and, if connected to an
external storage tank - supplies hot water for DHW.
If there is a heat request, the boiler switches on and the boiler status indica-
tor LED lights up with a fixed green light. The digital monitor indicates the
heating water temperature (fig. 40).
If there is a domestic hot water request, the boiler switches on and the
boiler status indicator LED lights up with a fixed green light.
The display indicates the delivery temperature (fig. 41).
Adjustment of the heating water temperature
To adjust the heating water temperature, turn the knob with symbol
(fig. 38) clockwise to increase water temperature and anti-clockwise to
lower it.
Depending on the type of system, the most suitable temperature range can
be pre-selected:
- standard installations 40-80°C
- floor installations 20-45°C.
Adjusting the heating water temperature with an external probe con-
nected
When an external probe is installed, the delivery temperature is automati-
cally selected by the system, which quickly adjusts the ambient tempera-
ture according to variations in the outside temperature. If you want to alter
the temperature value (increasing or reducing the value automatically cal-
culated by the electronic card), use the heating water temperature selector:
turn it clockwise to increase the temperature, or anticlockwise to reduce it.
The correction possibility is between -5 and +5 levels of comfort, shown on
the digital display by rotating the knob.
Summer mode only active when the external storage tank is connected:
turning the selector to the summer mode symbol
traditional domestic hot water only function, the boiler supplies water at
the temperature set on the external storage tank.
If there is a domestic hot water request, the boiler switches on and the
boiler status indicator LED lights up with a fixed green light. The display
indicates the delivery temperature (fig. 41).
Adjustment of the domestic hot water temperature
CASE A heating only with storage tank - adjustment does not apply
CASE B heating only + external storage tank with thermostat - adjustment
does not apply.
CASE C heating only + external storage tank with probe - to adjust the
temperature of the domestic hot water in the storage tank, turn the knob-
but with the symbol clockwise to increase water temperature and anti-
clockwise to lower it.
On the control panel, the green LED flashes with ON for 0.5 seconds, OFF
for 3.5 seconds.
The boiler is standby status until, after a heat request, the burner switches
on and the indicator LED turns fixed green to indicate flame presence.
The boiler continues to operate until the temperatures set on the boiler are
reached, or the heat request is met; after which it goes back on standby.
If the red LED indicator near the
lights up, this means the boiler is in temporary shutdown status (see the
chapter "Light signals and faults").
The digital monitor indicates the fault code detected.
S.A.R.A. function fig. 45
Setting the heating water temperature selector in the zone marked by
AUTO, activates the automatic temperature control system (green led
flashing): according to the temperature set on the room thermostat and
the time taken to reach it, the boiler varies automatically the heating water
temperature reducing the operating time, allowing greater ease of opera-
tion and energy saving. On the control panel, the green LED flashes ON for
0.5 seconds, OFF for 3.5 seconds.
Reset function
To restore operation, set the mode selector to
then set the mode selector to the required position, checking that the red
indicator light is OFF.
At this point the boiler will automatically start and the red lamp switches
on in green.
N.B. If the attempt to reset the appliance does not activate operation, con-
tact the Technical Assistance Service.
3A SWITCHING OFF
Temporary switch-off
In case of absence for short periods of time, set the mode selector (fig.
42) to (OFF). In this way (leaving the electricity and fuel supplies ena-
bled), the boiler is protected by the following systems:
Anti-frost device: when the temperature of the water in the boiler falls
below 5°C, the circulator and, if necessary, the burner are activated at mini-
mum output levels to bring the water temperature back to the values for
safety (35°C). During the anti-frost cycle, the symbol
on the digital monitor.
(fig. 39) activates the
symbol (fig. 44) on the control panel
(fig. 42), wait 5-6 seconds
(fig. 46) appears