Switching Off - Beretta Mynute S 24 C.S.I. Manuel D'utilisation Et D'installation

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 fl ame 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.) fi g. 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 - fi g. 1a) to (OFF).
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 - fi g. 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.
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 insuffi cient
water circulation, the boiler will switch off. Under no circumstances,
water pressure must be below 0.5 bar (red fi eld).
If this condition is checked, it is necessary to restore water pres-
sure in the boiler proceeding as follows:
- set the mode selector (3 - fi g.1a) to
- turn on the fi lling tap (L fi g. 13 for C.A.I. - 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.
Adjustment System Function
(OFF)
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 (C.S.I. models)
Fumes thermostat (C.A.I. models)
H2O pressure switch alarm
NTC domestic water fault (R.S.I only with external
storage heater with probe)
NTC heating fault
Parasite fl ame
Electric calibration min and max heating
Transient awaiting ignition
Air pressure switch intervention (C.S.I. models)
Fumes thermostat intervention (C.A.I. models)
H2O pressure switch intervention
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
Technical Assistance Centre.
Fault A 04
appears
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 fi lling tap (L fi g. 13 for C.A.I. - 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
mer) or (winter).
If pressure drops are frequent, request the intervention of the Tech-
nical Assistance Service.
Fault A 06 (only C.A.I. - C.S.I.)
The boiler operates normally but cannot reliably maintain a con-
stant domestic hot water temperature, which remains set at around
50°C. Contact the Technical Assistance Centre.
Fault A 07
Contact the Technical Assistance Centre.
Mynute S
DISPLAY
-
OFF
A01
A01
A02
A03
A04
A06
A07
A11
ADJ
88°C
fl ashing
fl ashing
fl ashing
fl ashing
60°C
80°C
(OFF), wait 5-6 seconds then
(summer mode) or (winter
(OFF)
.
(sum-
13