ENGLISH
9
If there is a domestic hot water request, the boiler switches on and the
boiler status indicator LED lights up with a fixed green light.
The digital di-
splay shows the hot water system temperature, the icon to indicate the hot
water supply and the flame icon (fig. 30).
Pre-heating (faster hot water):
turning the domestic hot water tempera-
ture adjustment knob to the
symbol (fig. 31) activates the pre-heating
function. Bring the domestic hot water temperature adjustment knob back
to the required position.
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 next to the
symbol is lit. The monitor 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 tem-
perature 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
to
(OFF) (fig.32).
Adjustment of the domestic hot water temperature
To adjust the domestic hot water temperature (bathrooms, shower, kitchen,
etc.), turn the knob with the
symbol (fig. 33)
rotate clockwise to increase
the temperature and anticlockwise to reduce it. On the control panel, the
green LED flashes with ON for 0.5 seconds, OFF for 3.5 seconds.
The boiler is standby status until, after a heat request, the burner switch-
es on and the indicator LED turns fixed green to indicate flame presence.
The boiler continues to operate until the temperatures set on the boiler are
reached, or the heat request is met; after which it goes back on standby.
If the red LED indicator near the symbol (fig. 34) on the control panel
lights up, this means the boiler is in temporary shutdown status (see the
section on “Light signals and faults”).
The digital monitor indicates the fault code detected.
Automatic Temperature Control System function (S.A.R.A.) fig. 35
Setting the heating water temperature selector to the area indicated (tem-
perature range 55 to 65°C
), activates the automatic temperature control
system (frequency 0.1 sec. on; then 0.1 sec. off; for 0.5 seconds): according
to the temperature set on the room thermostat and the time taken to reach
it, the boiler varies automatically the heating water temperature reducing
the operating time, allowing greater ease of operation and energy saving.
On the control panel, the green LED flashes ON for 0.5 seconds, OFF for
3.5 seconds.
Reset function
To restore operation, set the function selector to (OFF)
(fig. 32), wait 5-6
seconds then set 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.
NOTE:
If the attempt to reset the appliance does not activate operation,
contact the Technical Assistance Service.
4.2 Switching off
Temporary switch-off
In case of absence for short periods of time, set the mode selector to
(OFF) (fig. 32).
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 boiler falls
below 5°C, the circulator and, if necessary, the burner are activated at mini
-
mum output levels to bring the water temperature back to the values for
safety (35°C).
During the anti-frost cycle, the symbol
(fig. 36) appears
on the digital monitor.
Circulator anti-blocking function:
an operation cycle is activated every
24 hours.
Switching off for long periods
In case of absence for long periods of time, set the mode selector to
(OFF) (fig. 32). Turn the main system switch OFF. Close the fuel and water
taps of the heating and domestic hot water system. In this case, anti-frost
device is deactivated: drain the systems, in case of risk of frost.
BOILER STATUS
DISPLAY
RED LED
YELLOW LED
GREEN LED
TYPES OF
ALARMS
Off status (OFF)
OFF
flashing 0.5 on/
3.5 off
None
Stand-by
-
flashing 0.5 on/
3.5 off
Signal
ACF alarm lockout module
A01
on
Definitive lockout
ACF electronics fault alarm
Limit thermostat alarm
A02
flashing 0.5 on/
0.5 off
Definitive lockout
Tacho fan alarm
A03
on
Definitive lockout
Water pressure switch alarm
A04
on
on
Definitive lockout
NTC domestic water fault
A06
flashing 0.5 on/
0.5 off
flashing 0.5 on/
0.5 off
Signal
NTC heating outlet fault
A07
on
Temporary stop
Heating outlet probe overtemperature
Temporary then
definitive
Outlet/return line probe differential alarm
Definitive lockout
NTC heating return line fault
A08
on
Temporary stop
Heating return line probe overtemperature
Temporary then
definitive
Outlet/return line probe differential alarm
Definitive lockout
Cleaning the primary heat exchanger
A09
flashing 0.5 on/
0.5 off
flashing 0.5 on/
0.5 off
Signal
NTC flue gases fault
Temporary stop
Flue gases probe overtemperature
on
Definitive lockout
False flame
A11
flashing 0.2 on/
0.2 off
Temporary stop
Low temperature system thermostat alarm
A77
on
Temporary stop
Temporary pending ignition
flashing 0.5 on/
0.5 off
Temporary stop
4.3 Light signals and faults
