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12 - USE
12.4 - Start-up
procedure
1. Open the manual shutoff gas valve;
2. switch on electric power to the
boiler;
3. If the display shows code E21, it
means that the polarity has not
been observed between phase and
neutral;
4. on initial start-up, the appliance
carries out an auto-purging
cycle lasting two minutes. This is
indicated by the appearance of
on the display;
5. wait two minutes until the end of the
auto-purging cycle;
6. turn knob "7" of fi gure 37 until it
reaches the heating temperature
desired. Turn knob "11" of fi gure 37
until it reaches the domestic water
temperature desired.
The fl ame control appliance will start-
up the burner.
If the burner fails to ignite within 15
seconds, the boiler will automatically
attempt ignition another three times,
after which if it fails to start-up, it will
shut down and the display will show
01.
Press the
button in order to
re-set normal operating conditions.
The boiler will automatically attempt
another start-up.
CAUTION!!! If the appliance
frequently shuts down, contact
a qualifi ed technician to restore
normal running conditions.
Now the boiler will continue to operate
in relation to the service requested
and will indicate the following on
display "1":
-
if a domestic water request is
active;
-
if a heating request is active;
-
if there is no domestic water or
heating request active.
45
12.5 - Summer
mode
To disable the heating functions for
a prolonged period, leaving only the
domestic hot water function, switch
OFF the heating temperature, until
the wording OFF appears, by turning
knob "7" of fi gure 37 to the minimum.
12.6 - Winter mode
In Winter mode, by means of the
pump, the boiler sends the water to
the system at the temperature set
using knob "7" of fi gure 37.
When the temperature inside the
boiler reaches the temperature set,
the burner starts to modulate the
fl ame so as to reduce the output to
a minimum. If the temperature rises
further, the burner shuts down.
Simultaneously, the pump which
sends the water to the system is
switched on and off by the room
thermostat. This can be noted,
because indicator "6" of fi gure 37
switches on and off in correspondence
with the on and off of the pump.
At fi rst the pump may make a noise.
This is due to the presence of residual
air in the hydraulic system which will
soon disappear on its own.
We recommend keeping the
temperature set using knob "7" at
the point shown by the symbols on
the panel for a rational use of the
boiler. If it is a particularly cold Winter
and it is diffi cult to maintain the
desired temperature, turn knob "7" to
gradually higher values.
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