Reset Function; Switching Off - Beretta Mynute J 20 C.S.I. Manuel D'installation Et D'utilisation

ENGLISH
2A IGNITION
First ignition must be carried out by personnel from the Technical Assistance
Service. At the same time, if it is necessary to put the appliance in service
again, carefully follow the described operations.
To start-up the boiler it is necessary to carry out the following operations:
- power the boiler
- open the gas tap present in the system to allow fuel flow
- turn the mode selector to the desired position:
summer mode: turning the mode selector to the summer symbol "
(fig. 2a) the traditional function of only domestic hot water is activated.
If there is a domestic hot water request, the boiler switches on and the
boiler status indicator LED (1) lights up with a fixed green light. The digital
monitor (5) indicates the domestic hot water temperature (fig. 4a).
winter mode: turning the mode selector to the area divided in segments
(fig. 2b) the boiler provides hot water and heating. If there is a heat re-
quest, the boiler switches on and the boiler status indicator LED (1) lights
up with a fixed green light. The digital monitor (5) indicates the heating
water temperature (fig. 3a). If there is a domestic hot water request, the
boiler switches on and the boiler status indicator LED (1) lights up with a
fixed green light. The digital monitor (5) indicates the domestic hot water
temperature (fig. 4a).
Adjust ambient thermostat to desired temperature (approximately 20°C)
Adjustment of the heating water temperature
To adjust the heating water temperature, turn the knob with symbol "
(fig. 5a) to the area divided in segments.
Adjustment of domestic hot water temperature
To adjust domestic water temperature (bathrooms, showers, kitchen, etc.),
turn the knob with symbol " " (fig. 6a): to one of the numerical values within
1 (min value 37 °C) and 9 (max. value 60 °C).
Pre-heating (faster hot water): rotate the domestic hot water temperature
adjustment knob (3 - fig. 1a) to the "
one of the numbers between 1 (min. value 37°C) and 6 (max. value 60°C)
(fig. 6a) to activate the pre-heating function. This function keeps the water
in the domestic hot water exchanger hot, to reduce standby times when a
request is made. When the pre-heating function is enabled, the yellow LED
(1) in line with the " " symbol is ON. The monitor (5) indicates the delivery
temperature of the heating water or the domestic hot water, according to the
current request. During burner ignition following a pre-heating request, the
monitor indicates the " " symbol. To deactivate the pre-heating function,
rotate the domestic hot water temperature adjustment knob back to the
" " symbol. The yellow LED will switch off. Bring the domestic hot water
temperature adjustment knob back to the required position.
This function cannot be activated when the boiler is OFF: function
selector (2 fig.1a) on "
If the red indicator light near the "
up, this means the boiler is in temporary stop status (see the chapter
about light signals and faults). The digital monitor indicates the fault code
detected (fig. 8a).
Environment Automatic Adjustment System Function (S.A.R.A.) fig. 10a
By setting the heating water temperature selector to the area marked by
AUTO, the S.A.R.A. self-adjusting system is activated (frequency 0.1 sec.
on; 0.1 sec. off; duration 0.5): according to the temperature set on the
ambient thermostat and the time employed to reach it, the boiler varies
automatically the heating water temperature reducing the operating time,
allowing great operation comfort and energy saving.
On the control panel, the green LED flashes with a frequency of 0.5 second
ON, 3, 5 seconds OFF.

Reset function

To restore operation, set the function selector to " " (fig. 11a), wait 5-6
seconds then bring the function selector to the required position, checking
that the red indicator light is OFF.
At this point the boiler will automatically start and the red lamp switches
on in green.
N.B. If the attempt to reset the appliance does not activate operation,
contact the Technical Assistance Service.
3A SWITCHING OFF
Temporary switching off
In case of absence for short periods of time, set the mode selector to " "
OFF (fig. 11a). Anti-frost device remains active. The monitor appears as
in fig. 12.a.
Long period switching off
In case of absence for long periods of time, set the mode selector to
" " OFF (fig. 11a).
Turn the main system switch OFF.
Turn off the fuel and water taps of the heating and domestic hot water
system. In this case, anti-frost device is deactivated: empty the systems,
in case of risk of frost.
4A CONTROLS
At the beginning of the heating season, and occasionally during use,
8
" symbol, then rotate it in line with
" (OFF).
" symbol on the command panel lights
make sure the hydrometer-thermohydrometer indicates cold system pres-
sure values between 0.6 and 1.5 bar: this avoids system 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 pressure in the
boiler proceeding as follows:
- set the mode selector (2 - fig.1a) to " " OFF
- turn on the filling tap (fig. 13a) 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 Assistance Service.
5A LIGHT SIGNALS AND FAULTS
The control panel has two led that indicate the boiler operating status:
Green led
Flashing
- Flashing with frequency 0.5 second on - 3.5 seconds off = boiler in standby,
there is no flame.
- Flashing with frequency 0.5 second on - 0.5 second off = temporary stop
of the appliance due to the following self-restoring faults:
- water pressure switch (standby time 10 minutes approximately)
- differential air pressure switch (standby time 10 minutes approximately)
"
- transitory waiting for ignition.
In this phase, the boiler waits for restoration of working conditions. If after
standby time, the boiler will not restore regular operation, stop will be perma-
nent and light signalling will be red.
- Fast flashing (frequency 0.1 sec. on; 0.1 sec. off; duration 0.5) S.A.R.A.
input/output function (Italian acronym for Environment Automatic Adjustment
System) - Fig. 10a.
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 ambient thermostat. When the temperature set
with the heating water temperature selector is reached, a 20 minutes count
begins. If during this period the ambient 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 ambient 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 increase of +10 °C of
the S.A.R.A function
After the second increasing cycle, the temperature value is restored to the
value set by the user and the above mentioned cycle is repeated until the
ambient thermostat request is fulfilled.
Fixed green
If there is a flame, the boiler works regularly.
Red led
If the red LED lights up, this indicates the presence of a fault; the monitor
visualises a code interpreted as follows:
A 01 flame failure (fixed red LED + flame failure icon "
A 02 limit thermostat intervention (blinking red LED)
A 03 differential air pressure switch intervention (fixed red LED)
A 04 water pressure switch after the transitory phase (fixed red LED + filling
icon " ")
A 06 domestic hot water NTC probe (blinking green + red LEDs)
A 07 heating NTC probe (fixed red LED)
To restore operation: faults A 01-02-03
Position the function selector on "
the required position (summer) "
do not reactivate the boiler, contact the Technical Assistance Centre.
Fault A 04
Along with the fault code, the digital monitor visualises the "
the pressure value indicated by the hydrometer-thermohydrometer: if it is less
than 0.3 bar, position the function selector on OFF and adjust the filling tap
until the pressure reaches a value between 1 and 1.5 bar. Position the function
selector on the required position (summer) "
pressure drops occur frequently, contact the Technical Assistance Centre.
Fault A 06
The boiler functions normally but does not guarantee a constant domestic
hot water temperature, which remains set at around 50°C.
Fault A 07
Contact the Technical Assistance Centre.
Fixed yellow LED
Pre-heating function activated.
")
" OFF, wait 5-6 seconds then rotate it to
" or " " (winter). If the reset attempts
" symbol. Check
" or " " (winter). If these