4
MYNUTE X
1 WARNINGS AND SAFETY
b The boilers manufactured in our factories are checked even in the smallest details
in order to protect users and installers against possible injury. After working on
the product, qualied personnel must check the electrical wiring, in particular the
stripped part of leads, which must not protrude from the terminal board and avoiding
possible contact with live parts of the leads themselves.
b This installer and user manual constitutes an integral part of the product: make sure
they are always kept with the appliance, even if it is transferred to another owner or
user, or moved to another heating system. In the event of loss or damage, please
contact your local Technical Assistance Centre for a new copy.
b The boiler must only be installed and serviced by qualied personnel, in accordance
with current regulations.
b The installer must instruct the user about the operation of the appliance and about
essential safety regulations.
b This boiler must only be used for the application it was designed for. The manufacturer
accepts no liability within or without the contract for any damage caused to people,
animals and property due to installation, adjustment and maintenance errors or to
improper use.
b This appliance should not be operated by children younger than 8 years, people
with reduced physical, sensory or mental capacities, or inexperienced people
who are not familiar with the product, unless they are given close supervision or
instructions on how to use it safely and are made aware by a responsible person
of the dangers its use might entail. Children must not play with the appliance. It is
the user's responsibility to clean and maintain the appliance. Children should never
clean or maintain it unless they are given supervision.
b After removing the packaging, make sure the content is in good condition and
complete. Otherwise, contact the dealer from whom you purchased the appliance.
b The safety valve outlet must be connected to a suitable collection and venting
system. The manufacturer declines all liability for any damage caused due to any
intervention carried out in the safety valve.
b The seal of the condensate drainage connection line must be secure, and the line
must be fully protected against the risk of freezing (e.g. by insulating it).
b Check that the rainwater drainage channel of the ue gas exhaust coupling and the
relative connecting pipe are free of obstructions.
b Dispose of all the packaging materials in the suitable containers at the corresponding
collection centres.
b Dispose of waste by being careful not to harm human health and without employing
procedures or methods which may damage the environment.
b During installation, inform the user that:
- in the event of water leaks, the water supply must be shut off and the Technical
Assistance Centre contacted immediately
- periodically check that the operating pressure of the hydraulic system is com-
prised between 1 and 1.5 bar.
b If the boiler is not used for a long period of time, it is recommended to perform the
following operations:
-turn the main switch of the appliance to "OFF"
-set the boiler status to OFF ( )
- close the fuel and water taps of the heating and domestic hot water system
- empty the heating and domestic hot water circuits if there is the risk of freezing
b Boiler maintenance must be carried out at least once a year; this should be booked
in advance with the Technical Assistance Centre to ensure the necessary safety
standards.
b For the assembly, programming and commissioning of the boiler when used in
hybrid systems with a heat pump, storage cylinder and solar heating circuit refer
to the system manual.
At the end of its life, the product should be not be disposed of as solid urban waste,
but rather it should be handed over to a differentiated waste collection centre.
For safety reasons, please remember that:
a It is forbidden to activate electric devices or appliances such as switches, household
appliances and so on if you notice a smell of fuel or unburnt fuel. In this case:
- ventilate the room by opening the doors and windows:
- close the fuel shut-off device;
- ask the Technical Assistance Service or professionally qualied personnel to
intervene promptly.
a It is forbidden to touch the appliance while barefoot or if parts of your body are wet.
a Any
technical or cleaning operation is forbidden before disconnecting the appliance from
the main power supply by turning the system's main switch to "OFF" by setting the boiler
to "OFF" ( )
.
a Do not modify the safety or adjustment devices without the manufacturer’s
authorisation and precise instructions.
a It is prohibited to pull, detach or twist the electrical cables coming from the appliance
even if it is disconnected from the mains power supply.
EN ENGLISH a Avoid blocking or reducing the size of the air vent openings in the installation
room, do not leave inammable containers and substances in the room where the
appliance is installed.
a Do not leave ammable containers and substances in the room where the device
is installed.
a It is forbidden to disperse the packaging material in the environment and leave it
within children's reach as it may be a potential source of danger. It must be disposed
in accordance with the present law.
a It is forbidden to obstruct the condensate drain outlet. The condensate drain pipe
should be facing the discharge pipe, preventing the formation of further drain pipes.
a Never carry out any work on the gas valve.
a Only for the user: Do not access the inside of the boiler. Any work on the boiler
should be carried out by the Technical Assistance Centre or by professionally
qualified personnel.
INSTALLATION MANUAL
2 DESCRIPTION
The MYNUTE X C boilers have a new ACC combustion control system (active combustion
control). This new control system, developed by Beretta, in all circumstances provides
functionality, efciency and low emissions. The ACC system uses an ionisation sensor
immersed in the burner ame, whose information allows the control board to operate the
gas valve that regulates the fuel. This sophisticated control system provides for the auto
adjustment of the combustion, thereby eliminating the need for an initial calibration. The
ACC system can adapt the boiler to operate with different gas compositions, different pipe
lengths and various altitudes (within the design limits). The ACC system can also perform
an auto-diagnostic operation that locks out the burner before the permitted upper emission
limit is exceeded.
MYNUTE X C is a type C condensing wall-hung boiler to be used for heating and the
production of domestic hot water.
Depending on the fume discharge accessory used, it is classied in categories B23P; B53P;
C(10)*; C13,C13x; C33,C33x; C43,C43x; C53,C53x; C83,C83x; C93,C93x.
* Currently not available on model 40kW.
In conguration B23P (when installed indoors), the appliance cannot be installed in
bedrooms, bathrooms, showers or where there are open replaces without a proper air ow.
The room where the boiler is installed must have proper ventilation. Detailed requirements
for the installation of the ue, the gas piping and for ventilating the room, can be found in
UNI 7129-7131.
In conguration C, the appliance can be installed in any type of room and there are no
limitations due to ventilation conditions or room volume.
3 INSTALLATION
3.1 Cleaning the system and characteristics of the 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. anti-freeze liquids, lming agents, etc.) and check the parameters in the
table are within the values indicated.
PARAMETERS UM HEATING CIRCUIT WATER FILLING WATER
pH value 7–8 -
Hardness °F - < 15
Appearance - clear
Fe mg/kg 0.5 -
Cu mg/kg 0.1 -
3.2 Handling
After unpacking, handling of the boiler is done manually using the support frame.
3.3 Installation room
The MYNUTE X C boiler can be installed in various types of room, as long as the discharge
of the combustion product and the combustion air suction are outside the room itself. In this
case the room does not need any ventilation opening since the MYNUTE X C boilers have a
combustion circuit that is "airtight" with respect to the installation environment.
b Consider the clearances necessary to access safety and adjustment devices and to
perform maintenance operations.
b Check that the electric protection level of the appliance is adapted to the installation
room characteristics.
b If the boilers are supplied with fuel gas of a specic weight greater than that of the
air, the electric parts will have to be positioned more than 500mm above ground
level.
3.4 Installation on appliances that are old or that need to be updated
When the MYNUTE X C boiler is installed in old systems or systems being updated, check that:
- the ue is suitable for the temperature of the combustion products with condensation,
calculated and built according to Standard, is as straight as possible, airtight, insulated
and has no blockages or narrow sections. It is equipped with appropriate condensate
collection and discharge systems
