Switching Off - Beretta MYNUTE GREEN E Installer And User Manual

ENGLISH
automatically calculated by the electronic board, turn the heating
water selector (fig. 3b) clockwise to increase and anticlockwise to
decrease.
Adjustment settings range from comfort levels - 5 to + 5 which are
indicated on the digital display when the knob is turned.
Mynute Green C.S.I. E:
Adjustment of domestic hot water temperature
To adjust domestic water temperature (bathrooms, showers, kitch-
en, etc.), turn the knob with symbol
marked + and -.
The boiler is standby status until, after a heat request, the burner
switches on and the digital display shows the hot water system tem-
perature, the icon to indicate the hot water supply and the flame icon
The boiler will be in function until the adjusted temperature is
reached, afterwards it will be in "standby" again.
Mynute Green R.S.I. E:
Adjustment of the domestic hot water temperature
CASE A heating only - adjustment does not apply
CASE B heating only + external storage tank with thermostat - ad-
justment 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 tempera-
ture and anti-clockwise to lower it.
The boiler is standby status until, after a heat request, the burner
switches on and the digital display shows the hot water system tem-
perature, the icon to indicate the hot water supply and the flame icon
The boiler will be in function until the adjusted temperature is
reached, afterwards it will be in "standby" again.
Environment Automatic
(S.A.R.A.) fig. 7a
By setting the heating water temperature selector to the area
marked by AUTO - temperature value from 55 to 65°C - the
S.A.R.A. self-adjusting system is activated: the boiler varies the
delivery temperature according to the closing signal of the room
thermostat. When the temperature set with the heating water tem-
perature selector is reached, a 20 minutes count begins. If during
this period the room thermostat still requests heat, the value of the
set temperature automatically increases by 5 °C.
When the new value is reached, other 20 minutes count begins.
If during this period the room thermostat still requests heat, the
value of the set temperature automatically increases by 5 °C.
This new temperature value is the result of the temperature set
manually with the heating water temperature selector and the in-
crease of +10 °C of the S.A.R.A function.
After the second cycle the temperature value should be kept at the
set value +10°C until the request of the room thermostat is met.
3A SWITCHING OFF
Temporary switching off
In case of absence for short periods of time, set the mode selector
(3 - fig. 1a) to (OFF) (fig. 2a).
In this way (leaving the electricity and fuel supplies enabled), the
boiler is protected by the following systems:
- Anti-frost device: when the temperature of the water in the boil-
er falls below 5°C, the circulator and, if necessary, the burner are
activated at minimum output levels to bring the water tempera-
ture back to the values for safety (35°C). During the anti-frost
cycle, the symbol appears on the digital monitor.
- Circulator anti-blocking function: an operation cycle is acti-
vated every 24 hours.
- DHW Antifreeze (only when connected to an external stor-
age tank with probe): the function is activated if the temperature
measured by the storage tank probe drops below 5° C. A heat re-
quest is generated in this phase with the ignition of the burner at
minimum power, which is maintained until the water temperature
reaches 55° C. During the anti-frost cycle, the symbol
on the digital monitor.
Long period switching off
In case of absence for long periods of time, set the mode selector
(3 - fig. 1a) to (OFF).
Then, close the gas tap present on the system. In this case, anti-
frost device is deactivated: empty the systems, in case of risk of
frost.
16
(fig. 3a) within the area
Adjustment System Function
4A CONTROLS
At the beginning of the heating season, and occasionally during
use, make sure the hydrometer-thermohydrometer indicates cold
system pressure values between 0.6 and 1.5 bar: this avoids sys-
tem noise levels due to the presence of air. In case of insufficient
water circulation, the boiler will switch off. Under no circumstances,
water pressure must be below 0.5 bar (red field).
If this condition is checked, it is necessary to restore water pres-
sure in the boiler proceeding as follows:
- set the mode selector (3 - fig.1a) to
- turn on the filling tap (B fig. 17 for C.S.I. - external for R.S.I.) until
the pressure value is between 1 and 1.5 bar.
Carefully close the tap. Replace the mode selector on the initial
position. If pressure drop is frequent, contact the Technical Assis-
tance Service.
5A LIGHT SIGNALS AND FAULTS
The operating status of the boiler is shown on the digital display,
below is a list of the types of displays.
BOILER STATUS
Stand-by
OFF status
ACF module lockout alarm
ACF electrical fault alarm
Limit thermostat alarm
Air pressure switch alarm
H2O pressure switch alarm
NTC domestic water fault (R.S.I only with external
storage heater with probe)
Primary (flow) thermistor fault - Primary (flow) thermi-
stor over temperature - Temperature differential
Return thermistor fault - Return thermistor overtem-
perature - Temperature differential inverted
Flue thermistor or flue thermistor counter fault -
Flue thermistor over temperature
False flame
Low temperature thermostat fault
Calibration
Service operation
Transient awaiting ignition
H2O pressure switch intervention
Purge cycle mode active
Preheating Function active (only C.S.I.)
Preheating heat request (only C.S.I.)
External probe present
Domestic water heat request
Heating heat request
Anti-freeze heat request
Flame present
To restore operation (deactivate alarms):
Faults A 01-02-03
Position the function selector to
set it to the required position
mode). If the reset attempts do not reactivate the boiler, contact the
appears
Technical Assistance Centre.
Fault A 04
In addition to the fault code, the digital display shows the symbol
Check the pressure value indicated by the water gauge:
if it is less than 0.3 bar, position the function selector to
and adjust the filling tap (B fig. 17 for C.S.I. - external for R.S.I.)
until the pressure reaches a value between 1 and 1.5 bar.
Then position the mode selector to the desired position
(OFF)
DISPLAY
-
OFF
A01
A01
A02
A03
A04
A06
A07
A08
A09
A11
A77
ADJ
ACO
88
°C flashing
flashing
flashing
60
°C
80
°C
(OFF), wait 5-6 seconds then
(summer mode) or (winter
(OFF)
(sum-
.