Beretta Mynute Green E 25 C.S.I. Installer And User Manual page 4

ENGLISH
- 3-way valve with electric actuator
- heat exchanger for DHW preparation in brazed stainless steel with
anti-limescale device
- expansion tank
- low consumption modulating circulator
- manual loading of the heating circuit
- water pressure switch
- hydrometer to visualise heating water pressure
- circulator anti-blocking device
- airtight combustion chamber
- electrically operated gas valve with dual shutter to command the
burner
- domestic hot water heat exchanger pre-heating function to reduce
domestic hot water standby times
- self-diagnostics for signalling the cleaning of the primary circuit
heat exchanger.
The safety devices of the appliance are:
- a water limit thermostat, to check for any overheating of the appli-
ance and thereby ensure the 100% safety of the system. To restore
operation if a limit thermostat has been triggered, set the function
selector to OFF/RESET and then return it to the desired position
- flue gas probe: this intervenes (putting the boiler in safety stop
mode) if the temperature of the combustion products exceeds the
maximum operating temperature of the discharge pipes
- 3 bar safety valve on the heating circuit
- a microprocessor check of probe continuity, with any faults indicat-
ed on the display
- a syphon with float, for discharging the condensate and preventing
the leakage of flue gases
- a condensate level sensor that operates by blocking the boiler if
the level of condensate in the heat exchanger exceeds the allowed
limit
- first level anti-freeze function (suitable for indoor installations)
which also operates with the boiler in standby and which is activat-
ed when the water temperature falls below 6°C
- diagnosis for absence of circulation (via the display of the temper-
atures read by the delivery and return probes)
- diagnosis for absence of water (via the water pressure switch)
- a flue gas safety evacuation system incorporated in the pneumatic
operation of the gas valve
- diagnosis for overtemperature on both the delivery and return
lines, with dual probe - limit temperature 95°C -
- high modulation, the boiler can automatically modulate the output
power in a maximum and minimum range (see technical data)
The boiler is installation ready for the following:
- a safety thermostat for reduced temperature systems
- an ambient thermostat or hourly timer
- connection to remote control with related alarm signalling.
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3 - INSTALLATION
3.1 Installation regulations
Installation must be carried out by qualified personnel in compliance
with local regulations.
POSITION
Mynute Green E C.S.I. is a wall-mounted boiler for heating and for
the production of hot water. There are two categories, depending on
the type of installation:
1. B23P-B53P type boiler - forced open installation, with flue gas
discharge pipe and pick-up of combustion air from the installa-
tion area. If the boiler is not installed outdoors, air intake in the
installation area is compulsory.
2. C13, C13x type boiler; C23; C33, C33x; C43, C43x; C53, C53x;
C63, C63x; C83, C83x, C93, C93x: appliance with airtight cham-
ber, 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 condensation boilers with an air-
tight chamber.
MINIMUM DISTANCES
In order to have access to the boiler to perform regular maintenance
operations, respect the minimum spaces foreseen for installation
(fig. 1).
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 3.6). 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 wording on the packag-
ing and by 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 ele-
ments must be airtight.
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.
Parameters Um
PH value
Hardness ° F
Appearance
Heating
Filling water
circuit water
7~8 -
- 15~20
- clear