Beretta Mynute Green E C.S.I. Series Installer And User Manual page 5

MINIMUM DISTANCES
In order to have access to the boiler to perform regular maintenance
operations, respect the minimum spaces foreseen for installation (fig.
1a).
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 protected
with proper insulation.
IMPORTANT
Before installation, wash every system piping carefully in order to
remove any residues that may impair the operation of the appliance.
Connect the discharge manifold to a suitable discharge system (for
details, refer to chapter 3.5). 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.
It is very important to highlight that in some cases the smoke pipes
are under pressure and therefore, the connections of several elements
must be airtight.
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 0 °C. This system is always active, guaranteeing boiler
protection to an outdoor temperature level of 0 °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 active 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 circuit.
The boiler component materials are resistant to ethylene glycol based
anti-freeze liquids.
3.2 Cleaning the system/characteristics of the heating
circuit 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, filming agents, etc.) and check the
parameters in the table are within the values indicated.
unit of
Parameters
measurement
pH value -
Hardness °F
Appearance -
Fe mg/kg
Cu mg/kg
3.3 Positioning the wall-mounted boiler and hydraulic
connections
The boiler is supplied as standard with a boiler support plate with
built-in pre-assembly template (fig. 3). The position and dimension of
hydraulic fittings are shown in the detail drawing.
For the assembly, proceed as follows:
- secure the boiler support plate (F) using the pre-assembly template
(H) to the wall and use a spirit level to make sure that everything is
perfectly horizontal
- mark the 4 holes (ø 6 mm) envisaged for securing the boiler support
plate (F) and the 2 holes (ø 4 mm) for securing the pre-assembly
template (H)
- 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 to the wall.
Make the hydraulic connections.
Hot water Filling
circuit water
7-8 -
- <15
- clear
0,5 -
0,1 -
The position and size of the hydraulic connections are indicated below:
R heating return line 3/4"
M
heating delivery 3/4"
G gas connection 3/4"
AC hot water 1/2" (C.S.I.) M
AF cold water 1/2" (C.S.I.) M
RB water tank return 3/4" (R.S.I.) M
MB
water tank delivery 3/4" (R.S.I.) M
3.4 Installing the external probe (fig. 4)
The correct operation of the external probe, supplied as an accessory,
is fundamental for the good operation of the climatic control.
INSTALLING AND CONNECTING THE EXTERNAL PROBE
The probe must be installed on an external wall of the building to be
heated, observing the following indications:
- it must be mounted on the side of the building most often exposed
to winds (the NORTH or NORTHWEST facing wall), avoiding direct
solar irradiation;
- it must be mounted about 2/3 of the way up the wall;
- it must not be mounted near doors, windows, air outlet points, or
near smoke pipes or other heat sources.
The electrical wiring to the external probe is made with a bipolar cable
with a section from 0.5 to 1 mm
of 30 metres. It is not necessary to respect the polarity of the cable
when connecting it to the external probe. Avoid making any joints on
this cable however; if joints are absolutely necessary, they must be
watertight and well protected.
Any ducting of the connection cable must be separated from live cables
(230V AC).
FIXING THE EXTERNAL PROBE TO THE WALL
The probe must be placed on a smooth part of the wall; in the case
of exposed brickwork or an uneven wall, look for the smoothest
possible area. Loosen the plastic upper protective cover by turning it
anticlockwise.
After deciding on the best fixing area of the wall, drill the holes for the
5x25 wall plug.
Insert the plug in the hole. Remove the card from its seat.
Fix the box to the wall, using the screw supplied.
Attach the bracket, then tighten the screw.
Loosen the nut of the cable grommet, then insert the probe connection
cable and connect it to the electric clamp.
To make the electrical connection between the external probe and the
boiler, refer to the "Electrical wiring" chapter.
b
Remember to close the cable grommet well, to prevent any air
humidity getting in through the opening.
Put the card back in its seat.
Close the plastic upper protective cover by turning it clockwise. Tighten
the cable grommet very well.
3.5 Condensate collection
The discharge manifold (A - fig. 5) collects condensate water, any
evacuation water from the safety valve and the system discharge water.
b
The manifold must be connected via a rubber pipe (not provided)
to an appropriate collection and evacuation system in the white
water discharge drain in compliance with current regulations. The
outer diameter of the manifold is 20 mm: it is therefore advisable
to use a rubber pipe Ø 18-19 mm closed with a suitable clamp
(not provided).
b
The manufacturer is not liable for any damage/flooding resulting
from the failure to channel the condensate.
b
Sealing of the condensate drainage connection line must be
guaranteed.
3.6 Gas connection
Before connecting the appliance to the gas network, check that:
- current prevailing standards have been met
- the gas type is appropriate for the appliance
- the piping is clean.
The gas pipe must be installed outdoors. If the pipe has to pass through
the wall, it must pass through the central opening in the lower part of
the template.
It is advisable to install a filter of suitable dimensions on the gas line if
the distribution network contains solid particles.
Once the appliance has been installed, check the connections are
sealed according to current installation regulations.
Mynute Green E C.S.I. - R.S.I.
M
M
M
(not supplied), with a maximum length
2
5