5
User’s operating instructions
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).
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 mi-
nutes.
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 indica-
ted.
- 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
correct 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
central 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 fun-
ctioning correctly, both in central heating request mode and in
domestic hot water production mode.
Lock-out indicator led
When this led is illuminated it indicates that the bur-
ner’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 boiler
(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 nea-
rest Unical authorized After Sales Service
Centre.
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 “Chimneysweeper”
mode is activated. This means that the boiler
will be forced to operate at the maximum (or
minimum) output so as to permit the adjust-
ment operations and the combustion analysis.
6.2 - CHECK LIST BEFORE COMMISSIONING
THE BOILER
Before commissioning the appliance it is recommended to
check the following points:
-
Check that the On-Off gas valve, positioned upstream of
the boiler, is in the On position..
-
Check that any On-Off valves fitted on the flow and return
pipes for servicing purposes are in the On position.
-
Check that any On-Off valves fitted on the cold water inlet
for servicing purposes are in the On position.
-
Check that the pressure relief valve drainage pipe is con-
nected to the sewage system.
-
Check that the boiler is connected to the electrical supply;
the green indicator led (
) on the control panel must be
illuminated..
-
Check the heating system pressure, indicated by the pres-
sure gauge. For correct operation the pressure should be
between 0,8 and 1 bar (with the pump not running).
If the pressure falls below 0,7 bar restore the correct pres-
sure by regulating the filling valve when the system is cold
and the boiler not operating (refer to paragraph 6.5).
