6
Vent cycle
Whenever the electrical supply to the appliance has been
disrupted (OFF) and then restored (ON), it will enter a 4-min
vent cycle.
b
When the air purging cycle is in progress, all heat
requests are inhibited except those for domestic hot
water when the boiler is not set to OFF and -AIR is
displayed on the interface screen.
The display shows the message -AIR lighting up the icon
RESET.
The purge cycle can be interrupted early by keeping key 2
(the icon
RESET
comes on). The purge cycle can also be
interrupted, if the boiler is not set to OFF, by a domestic hot
water request.
Adjust the ambient temperature thermostat to the desired
temperature (~20°C) or, if the system is equipped with a
programmable thermostat or timer, ensure that the thermo-
stat or timer is “active” and set correctly (~20°C)
Then set the boiler on
WINTER
or
SUMMER
depending on
the type of operation desired.
The boiler will start up and continue working until the set
temperatures are reached, after which it will then go back
to standby.
2.3A OPERATING MODE
For changing the operating status from WINTER to SUMMER
to OFF press key 1 until the icon for the desired function is
displayed.
2.3.1A WINTER MODE
Set the boiler to the WINTER status by pressing key 1 until
both the domestic hot water icon and the heating icon are
displayed.
The interface normally displays the delivery temperature
unless there is a domestic hot water request in progress, in
which case the domestic hot water temperature is displayed.
When there is a heat request and the burner is lit, the icon
appears on the display.
Heating REQUEST, the radiator icon blinks:
Bar
2.3.2A SUMMER MODE
Set the boiler to the SUMMER status by pressing key 1
until the domestic hot water icon is displayed.
In this status the boiler activates the traditional function of
just domestic hot water, the interface normally displays the
delivery temperature. In the event of a domestic hot water pick
up, the display shows the temperature of the domestic hot
water.
Domestic hot water REQUEST, t
he tap icon blinks:
DAY
2.3.3A OFF
Set the boiler to the OFF status by pressing key 1 until the
central segments are displayed.
2.3.4A ADJUSTING THE HEATING WATER
TEMPERATURE WITHOUT AN OUTDOOR
TEMPERATURE SENSOR CONNECTED
If there is no outdoor temperature sensor the boiler operates
at a fixed point, the HEATING setpoint in this case can be set
on the main page of the screen.
The successive pressing of the key
C
or
D
on the main screen
displays the current value of the heating setpoint; the value
blinks with a frequency of 0.5 sec ON, 0.5 sec OFF and the
icons
and
come on.
RESET
+
MENU
+
D
C
The successive pressing of the key
C
or
D
allows you to set the
value of the heating setpoint within the preset range:
[40°C - 80.5°C] for high temperature systems
[20°C - 45 °C] for low temperature systems
with steps of 0.5°C. The level bars beside the heating icon
show the setpoint value set with respect to the operating range:
- four bars on = max setpoint
- one bar on = min setpoint
Keeping one of the two keys
C
or
D
pressed for longer, the
meter increases the speed of advancement modifying the set
value. If no key is pressed for 5sec, the value set is taken as
the new heating setpoint and the display returns to the main
page.
