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- if the wall-mounted boiler is enclosed in pendant furniture, leave
at least 5 cm for ventilation and maintenance;
- installation of an room thermostat will favour a greater comfort, a
more rational use of the heat and energy saving; the boiler can
also be connected to a programming clock in order to manage
ignition and switching off during the day or week.
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 op-
erations:
- power the boiler
- open the gas tap present in the system to allow fuel flow
- turn the mode selector (3 - fig. 1a) to the desired position:
Summer mode: turning the selector to the symbol summer
(fig. 2a) the traditional function of only domestic hot water is acti-
vated and the boiler supplies water at the temperature set on the
external storage tank. If there is a domestic hot water request the
digital display shows the hot water system temperature, the icon
to indicate the hot water supply and the flame icon.
Winter mode: by turning the mode selector within the area
marked + and - (fig. 3a), the boiler provides domestic hot water
and heating. If there is a heat request, the boiler switches on
and the digital monitor indicates the heating water temperature,
the icon to indicate heating and the flame icon (fig. 4a). If there
is a domestic hot water request, the boiler switches on and the
digital display shows the hot water system temperature, the icon
to indicate the hot water supply and the flame icon (fig. 5a).
- Adjust the room thermostat to the required temperature (~20°C)
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.
Environment
Automatic
(S.A.R.A.) fig. 5a
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.
Anti-legionellosis function
Legionellosis is an illness that can be caught by breathing in small
drops of water (aerosol) containing the legionellosis bacillus (this
bacterium is found in rivers and lakes all over the world).
The bacterium can be eliminated by heating the storage water to a
temperature of over 50/55 °C.
At least every 2/3 days, therefore, the domestic hot water tempera-
ture selector (knob with symbol
maximum temperature in order to heat the water in the storage
boiler to 60°C and remain at this temperature for at least 5 minutes.
20
(fig. 2b) within the area
Adjustment
System
Function
- fig. 7a) should be moved to
3A SWITCHING OFF
Temporary switching off
In case of absence for short periods of time, set the mode selector
(3 - fig. 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.
Long period switching off
In case of absence for long periods of time, set the mode selec-
tor (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.
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. 10) until the pressure value is be-
tween 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
Fumes thermostat
H
O pressure switch alarm
2
NTC water tank fault
NTC heating fault
Parasite flame
Electric calibration min and max heating
Transient awaiting ignition
H
O pressure switch intervention
2
External probe present
Domestic water heat request
Heating heat request
Anti-freeze heat request
Flame present
(OFF)
DISPLAY
-
OFF
A01
A01
A02
A03
A04
A06
A07
A11
ADJ
88°C
flashing
flashing
60°C
80°C
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