Green Heating Technology
9
Typical use
Preliminary operations
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Be sure the gas cock
3
is opened�
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Be sure the boiler is electrically powered and set in
OFF
: only
has to be displayed on the screen�
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Make sure, by the gauge
1
that the
cold-system temperature is always within 0.5 and 1.5 Bar (opti-
mal: 1÷1.5 Bar)
. When the pressure
drops below 0.5 Bar
, the boiler
stops working
. In this case, open
the system filling cock
2
up to obtain, on the gauge,
a value between 1.0 and 1.5 Bar
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The system pressure raises with the temperature: a too high initial cold-system pressure could
lead to
water drain from the 3 Bar safety valve
after the system heating-up.
Boiler activation
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Press the button
:
• once to set the boiler in summer mode only (DHW only). Summer mode is recognizable by the
only symbol presence
on the display and not by the symbol presence
;
•
pressing twice to set the boiler in winter mode for making the boiler working both for CH and
DHW. Winter mode is recognizable by the both symbols presence
and
on the display;
• at each press of the button
, the boiler cyclically switches from
OFF
to summer
and to
winter
+
mode�
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Opening a DHW tap, the burner fires up, and later then DHW is available.
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On winter mode
+
, when room thermostat demands for heating, the burner fires up and
thanks to the water flow the heating get transferred . In case of contemporary demand of both DHW
and CH, the DHW demand has the priority till the demand finish. Usually, as DHW does not last for
long, this priority does not affect the CH efficiency in the system.
Temperature adjustment
Note:
correct adjustment leads to creating the conditions for energy saving.
Note:
if a Low Temperature Kit or an Outdoor Probe Kit are installed, refer to the relevant documen
-
tation for what concerns the heating system temperature adjustment.
Note:
don't make confusion between the heating system temperature
here described, with the
temperature of the room set on the Room Thermostat.
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Heating system adjustment:
by using the buttons
and
, the setting of the heating
system temperature is made (the value, during the adjustment, is shown on the display under the
symbol
). Generally, in the deep cold season and/or with poor building thermal insulation (or
if you notice that the burner stays on for a long time, but the room temperature rises too slowly)
prefer higher settings. On the contrary, if you notice that the room temperature exceeds too much,
for thermal inertia, the value set on the room temperature, it's appropriate to decrease the system
temperature.
When the optional Outdoor Temperature Probe Kit is installed, the system tempera-
ture is automatically managed and the use of the buttons
and
is different:
for details,
see also "Outdoor Sensor Kit" on page 52.
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Domestic hot water adjustment:
the buttons
and
set the temperature of the hot water
produced by the boiler (the value, during the adjustment, is shown on the display under the sym
-
bol
). On this type of boiler, we suggest to set it in such a way to have a comfortable hot water
temperature by drawing only hot water or eventually by mixing it with a little cold water. Avoid
