Beretta MYNUTE X C Installer And User Manual page 5

- The electrical system is installed in compliance with the specific standards and by
qualified personnel
- The fuel supply line and eventual tank (LPG) are made according to specific Standards
- The expansion tank ensures the total absorption of the dilatation of the fluid contained
in the system
- The flow rate and head of the circulator are suitable to the characteristics of the system
- The system is washed, cleansed of any mud, build-up, vented and sealed. It is
recommended that a magnetic filter be installed on the system's return line
- The boiler condensate drain system (siphon) is connected and routed to the collection
of "white" water.
3.5 Installation regulations
The installation must be carried out by qualified personnel, in compliance with the following
reference standards: UNI 7129-7131 and CEI 64-8.
Always comply with local standards of the Fire Department, the Gas Company and with
possible municipal dispositions.
POSITION
MYNUTE X C is a wall-hung boiler for heating and for the production of hot water, that
comes in two categories, depending on the type of installation:
- B23P-B53P boiler type - forced open installation, with flue gas discharge pipe and pick-
up of combustion air from the installation area. If the boiler is not installed outdoors, air
intake in the installation area is compulsory.
- C(10), C13,C13x; C33,C33x; C43,C43x; C53,C53x; C83,C83x, C93,C93x boiler type:
appliance with airtight chamber, with flue gas discharge pipe and pick-up of combustion air
from outside. It does not require an air intake point in the installation area. This type MUST be
installed using concentric pipes, or other types of discharge designed for condensing boilers
with an airtight chamber.
MYNUTE X C can be installed indoor and outdoor, in a partially protected place (i.e. a place
where the boiler is not exposed to direct contact or infiltration of rain, snow or hail) and in
compliance with local and national regulation. The boiler can operate in a temperature range
from >0°C to +60°C.
MYNUTE X 25 C can also be installed outdoor in the built-in unit.
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 5°C. This system is always active
and provides protection for the boiler up to an air temperature in the installation area of 0°C.
b
To take advantage of this protection (based on burner operation), the boiler
must be able to switch itself on; any lockout condition (for ex. due to a lack
of gas or electrical supply, or the intervention of a safety device) therefore
deactivates the protection.
b
When the boiler is installed in a place where there is a risk of freezing, with
outside air temperatures below 0 °C, an antifreeze heater kit must be used to
protect the DHW circuit and condensation drain (available on request - see
catalog) that protects the boiler up to -15 °C.
b
The installation of the antifreeze heater kit must be carried out only by authorized
personnel, following the instructions contained in the kit.
In normal operating conditions, the boiler can protect itself against frost. If the machine is left
without power 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 hot domestic water part, we recommend you drain the circuit.
The boiler component materials are resistant to ethylene glycol based antifreeze liquids.
MINIMUM DISTANCES (Fig. 8a-8b)
To ensure access to the boiler for normal maintenance operations, respect the minimum
installation clearances envisaged.
For correct appliance positioning, bear in mind that:
- it must not be placed above a cooker or other cooking device
- it is forbidden to leave inflammable products in the room where the boiler is installed
- heat-sensitive walls (e.g. wooden walls) must be protected with proper insulation.
b
When installing it is ABSOLUTELY NECESSARY to provide the spaces necessary for the
introduction of the instrument for analysing the combustion. We have provided a sample
diagram where the distances between the boiler and wall unit /recess have been obtained
using an instrument with a length of 300 mm. Longer instruments require more space.
3.6 Installation of condensate drain pipe (Fig. 9)
b
Before starting the boiler, even just temporarily, the SRD device supplied must
be installed.The manufacturer does NOT accept liability for damage to persons
or objects caused by the boiler operating without the SRD device being installed
correctly.
For the installation proceed as follows:
- remove the plug (T) from the siphon
- fix the SRD device to the siphon, placing the gasket in-between, screwing it on all the
way and checking its seal
- connect the condensate discharge pipe supplied as standard with the product, then drain
the condensate into a suitable drainage system in compliance with current norms.
b
If it is not possible to fit the SRD device due to the interference with other objects
under the boiler, it is possible to fit it in a different position by inserting a connecting
pipe between the SRD device and the siphon in order to provide a fully airtight seal.
The SRD device should always be positioned VERTICALLY in order to ensure it
functions correctly.
3.7 Positioning the wall-mounted boiler and hydraulic
connections (Fig. 10)
The boiler comes as standard with a boiler support plate. The position and dimension of
hydraulic fittings are shown in the detail drawing. For the assembly, proceed as follows:
- fasten the boiler support plate (F) to the wall and use a spirit level to make sure it is
perfectly horizontal
- mark the 4 holes (ø 6 mm) envisaged for securing the boiler support plate (F)
- make sure that all measurements are exact, then drill the wall using drill tips with the
diameters indicated above
- fix the plate with the built-in template (G) to the wall.
- fix the safety valve pipe supplied in the documentation envelope onto the coupling of the
safety valve (S), then connect it to an adequate discharge system.
Make the hydraulic connections:
M
heating delivery
AC hot water outlet
G gas
R heating return line
AF cold water inlet
S
safety valve
3.8 Electrical connections
L
ow voltage connections
Make the low voltage connections as follows:
ƒ use connectors supplied as standard:
ƒ 4-poles connector for BUS 485 (- A B +)
ƒ 8-poles connector for TBT - TA -OT+ - SE
CN4
- A B +
CN4 (- A B +) Bus 485
CN8 TBT Low temperature limit thermostat
TA Room thermostat (voltage free contact input)
OT+ Open therm
SE Outdoor temperature sensor
bianco white
nero black
ƒ carry out the electrical wiring connections using the desired connector as shown in the
detailed drawing
ƒ once the electrical wiring connections have been made, correctly insert the connector
into its counterpart.
b
We recommend using conductors with a section no larger than 0,5 mm
b
In the event of TA or TBT connection, remove the related jumpers on the terminal board.
b
If the low voltage electrical connection box is not connected the boiler does not ignite.
CN8
CN4
OTBus remote control connection
When an OTBus remote control is connected to the system, the boiler display shows the fol-
lowing screen:
3/4" M
1/2" M
3/4" M
3/4" M
1/2" M
1/2" M
CN8
TBT
TA OT+ SE
Utilizzare contatto privo di tensione
voltage free contact input
.
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ENGLISH
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