36
User instructions
for the user
Controls and indicators
1
Termometer (°C)
• It indicates the temperature of the water sent to the heating system. This temperature is
influenced by the knob position [6].
2
Pressure gauge (bar)
• It indicates the pressure of the water in the heating system. For a correct functioning, the
system pressure, COLD-measured, must be between 0,5 and 1,5 bar (optimal value:
1÷1,5 bar).
• A correct pressure is important for the system good operation.
• In case of inferior pressures, reset the correct pressure (see “System Pressure” section).
If the pressure should decrease under 0,5 bar, the boiler will stop working.
3
Lamp
(electric supply)
OFF:
the boiler is without electric supply. The main supply switch (outside the boiler) could be
switched off or there could be a lack of mains voltage. It is not possible to execute any
function of the boiler, included the anti-freezing and anti-lockout functions.
ON:
the boiler is working, ready to ignite the burner to supply heating and/or hot water.
NORMAL FLASHING: STAND-BY:
the boiler is supplied but the Summer/Winter knob [6] is
in position “0”. The boiler does not execute the main functions, but the anti-freezing and
anti-lockout functions only (for details see “Boiler Inactivity”).
FLASHING WITH SHORT LIGHTNINGS:
It has been activated accidentally the chimney-
sweeper function (that is for the technician use only).
Exclude the Chimney-sweeper function, turning the Hot Water knob [7] between “I” and “IIIII”
and momentarily move the knob [6] to
0 -
, then move it [6] again to its previous
position.
4
Lamp (burner)
OFF:
the burner is switched off (there is no flame).
ON:
the burner is switched on (the flame is present).
5
Lamp
(lockout)
OFF:
the functioning is regular.
ON or FLASHING:
the boiler is locked for a problem or a malfunctioning. See “Alarms” section.
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