5
User’s operating instructions
Reset key with “Chimneysweeper” mode
WARNING!
This operation can be carried out exclusi-
vely by personnel from authorized After Sa-
les Service centres. The user is NOT autho-
rized to activate the following described
mode.
By pressing this key the “Chimneyswee-
per” mode is activated. This means that
the boiler will be forced to operate at the
maximum (or minimum) output so as to
permit the adjustment operations and the
combustion analysis.
By pressing this key for at least 3 seconds
the boiler will operate at the maximum ou-
tput (led
D
= illuminated and flashing and
led
E
= constantly illuminated).
By briefly pressing this key again (<3 secs.),
the boiler will operate at the minimum ou-
tput (both the leds
D
and
E
flashing).
The “chimneysweeper” mode will remain enabled for 15 minu-
tes.
To disenable the
“CHIMNEYSWEEPER”
mode before this set
time has elapsed, press the reset/chimneysweeper key
“G”
for at least 3 seconds.
System temperature control/pressure gauge
This displays:
- on the upper scale the central heating
hot water flow temperature is indicated.
- On the lower scale the water pressure
in the central heating system is indica-
ted.
- If the pressure is lower then 0,7 bar, then
it will be necessary to restore the cor-
rect pressure by operating the filling
valve when the system is cold and the
boiler not operating.
Power On indicator led
This led will illuminate when the boiler is connected to
the electricity supply
Central heating mode indicator led
This led will illuminate when there is a request for cen-
tral heating. If simultaneously there is a request for
domestic hot water production, the led will switch off.
Burner On indicator led
When this led is illuminated it indicates that the burner is
functioning correctly, both in central heating request
mode and in domestic hot water production mode.
“RIRA” pre-heating function
If this function is enabled it will ensure an
immediate supply of domestic hot water.
- This function is enabled if the led (green)
is illuminated.
- This function is
disenabled
if the led (gre-
en) is switched off.
To enable/disenable the
RIRA
function
press the appropriate key.
Lock-out indicator led
When this led is illuminated it indicates that the burner’s
safety cut-off device has shut-down the boiler.
Reset key
The function of this key is to reset correct boiler ope-
ration after the cut-off device has shutdown the boi-
ler (red led indicator illuminated)
If the cut-off device operates more than 3
times, causing boiler shutdown, do not try
to reset the boiler yourself. Contact your
nearest Unical authorized After Sales Servi-
ce Centre.
