9
JUNIOR GREEN R.S.I.
4.1 Switching on the appliance
Every time the appliance is powered up, a series of data is shown on the
display including the ue gas sensor meter reading (-C- XX) (see para-
graph 4.3 - fault A09); the automatic purge cycle then starts, lasting around
2 minutes. During this phase, the three LEDs light up alternately and the
symbol “ ” is shown on the monitor (g. 25).
To interrupt the automatic purge cycle proceed as follows:
access the electronic board by removing the housing, turning the instru-
ment panel towards you and opening the board casing (g. 16)
Then:
- press the CO button (g. 26).
Live electrical parts (230 V AC).
To start up the boiler it is necessary to carry out the following operations:
- power the boiler
- open the gas tap to allow the ow of fuel
- set the room thermostat to the required temperature (~20°C)
- turn the mode selector to the desired position:
Winter mode: turning the function selector (g. 27) in the area divided into
segments, the boiler supplies hot water for heating and, if connected to an
external storage tank - supplies hot water for DHW.
If there is a heat request, the boiler switches on and the boiler status indi-
cator LED lights up with a xed green light. The display the delivery tem-
perature (g. 29).
If there is a domestic hot water request, the boiler switches on and the
boiler status indicator LED lights up with a xed green light.
The display indicates the domestic hot water temperature (g. 30).
Adjustment of the heating water temperature
To adjust the heating water temperature, turn the knob with symbol “ ”
(g. 27) clockwise to the area divided into segments.
Summer mode only active when the external storage tank is connected:
turning the selector to the summer mode symbol “ ” (g. 28) activates the
traditional domestic hot water only function, the boiler supplies water at
the temperature set on the external storage tank.
If there is a domestic hot water request, the boiler switches on and the
boiler status indicator LED lights up with a xed green light. The display
indicates the delivery temperature (g. 30).
Adjustment of the domestic hot water temperature
CASE A heating only with storage tank - adjustment does not apply
CASE B heating only + external storage tank with thermostat - adjustment
does not apply.
CASE C heating only + external storage tank with probe - to adjust the
temperature of the domestic hot water in the storage tank, turn the knob-
but with the symbol (g. 32) in the area marked with numbers 1 (mini-
mum 37° C) and 9 (maximum 60° C).
On the control panel, the green LED ashes with ON for 0.5 seconds, OFF
for 3.5 seconds.
The boiler is standby status until, after a heat request, the burner switches
on and the indicator LED turns xed green to indicate ame presence.
The boiler continues to operate until the temperatures set on the boiler are
reached, or the heat request is met; after which it goes back on standby.
If the red LED indicator near the symbol (g. 33) on the control panel
lights up, this means the boiler is in temporary shutdown status (see the
chapter on Light signals and faults).
The digital monitor indicates the fault code detected.
Automatic Temperature Control System function (S.A.R.A.) g. 34
Setting the heating water temperature selector to the area marked “AUTO”,
activates the automatic temperature control system (frequency 0.1 sec. on;
then 0.1 sec. off; for 0.5 seconds): according to the temperature set on the
room thermostat and the time taken to reach it, the boiler varies automati-
cally the heating water temperature reducing the operating time, allowing
greater ease of operation and energy saving. On the control panel, the
green LED ashes ON for 0.5 seconds, OFF for 3.5 seconds.
Reset function
To restore operation, set the function selector to ” ” (g. 31), wait 5-6 sec-
onds then set the function selector to the required position, checking that
the red indicator light is OFF.
At this point the boiler will automatically start and the red lamp switches
on in green.
N.B. If the attempt to reset the appliance does not activate operation, con-
tact the Technical Assistance Service.
4.2 Switching off
Temporary switch-off
In case of absence for short periods of time, set the mode selector (g.
31) to (OFF).
In this way (leaving the electricity and fuel supplies enabled), the boiler is
4 - SWITCHING ON AND OPERATION
protected by the following systems:
Anti-frost device: when the temperature of the water in the boiler falls
below 5°C, the circulator and, if necessary, the burner are activated at mini-
mum output levels to bring the water temperature back to the values for
safety (35°C). During the anti-frost cycle, the symbol (g. 35) appears
on the digital monitor.
Circulator anti-blocking function: an operation cycle is activated every
24 hours.
DHW Antifreeze (only when connected to an external storage tank with
probe): the function is activated if the temperature measured by the stor-
age tank probe drops below 5° C. A heat request is generated in this phase
with the ignition of the burner at minimum power, which is maintained until
the water temperature reaches 55° C. During the anti-frost cycle, the sym-
bol (g. 35) appears on the digital monitor.
Switching off for long periods
In case of absence for long periods of time, set the mode selector (g. 31)
to “ ” (OFF).
Turn the main system switch OFF.
Close the fuel and water taps of the heating and domestic hot water sys-
tem.
In this case, anti-frost device is deactivated: drain the systems, in case of
risk of frost.
4.3 Light signals and faults
The control panel has three LEDs that indicate the boiler operating status:
Green LED
Flashing
Flashing (0.5 seconds on, then 3.5 seconds off) = boiler in standby, there
is no ame.
Flashing (0.5 seconds on, then 0.5 seconds off) = temporary shutdown of
the appliance due to the following automatic-reset faults:
- water pressure switch (standby time 10 minutes approximately)
- transitory waiting for ignition.
In this phase, the boiler waits for restoration of working conditions. If after
the standby time, the boiler does not restore regular operation, the shut-
down will be permanent and the signal light will be red.
Fast ashing (0.1 second on; then 0.1 second off; for 0.5 seconds) = Auto-
matic Temperature Control System input/output function (g. 34).
Setting the heating water temperature selector to the area marked “AUTO”
(temperature value from 55 to 65°C) activates the Automatic Temperature
Control System: the boiler varies the output temperature according to the
closing signal of the room thermostat.
When the temperature set with the heating water temperature selector is
reached, a 20-minute countdown begins. If during this period the room
thermostat still requests heat, the value of the set temperature automati-
cally increases by 5°C.
When the new value is reached, other 20-minute countdown begins. If dur-
ing this period the room thermostat still requests heat, the value of the set
temperature automatically increases by 5°C. This new temperature value
is the result of the temperature set manually with the heating water tem-
perature selector and the increase of +10°C of the Automatic Temperature
Control System (S.A.R.A) function.
After the second cycle, the temperature value is not increased any further
(set temperature +10°C) and cycle described above is repeated until the
room thermostat request is met.
Fixed green
there is ame, the boiler works regularly.
Red LED
If the red LED lights up, this indicates the presence of a fault; the monitor
shows a code interpreted as follows:
A 01 ame lockout (xed red LED + flame lockout icon )
A 02 limit thermostat operation (ashing red LED)
A 03 fan fault (xed red LED)
A 04 water pressure switch after transitory phase (xed green + red LEDs
+ lling icon “ ”)
A 06 storage tank probe (ashing red+green LEDs) (only with storage
tank with probe)
A 07 delivery/return differential or heating NTC sensor (xed red LED)
A 08 delivery/return differential or return NTC sensor (xed red LED)
A 09 ue gas sensor heat safety operation (xed red LED)
A 09
ue gas NTC sensor or exchanger cleaning (ashing red+green LEDs)
A 77 low temperature thermostat operation/generic alarm (ashing
red+green LEDs)
To restore operation (deactivate alarms):
Faults A 01-02-03
Position the function selector to (OFF), wait 5-6 seconds then set it to
