Beretta JUNIOR GREEN 25 C.S.I. Manual De Instalacion Y Uso página 10

JUNIOR GREEN C.S.I.
A09 flue gas sensor heat safety operation (fixed red LED)
A09 flue gas NTC sensor or exchanger cleaning (flashing red+green LEDs)
A77 low temperature thermostat operation / generic alarm (flashing
red+green LEDs)
To restore operation (deactivate alarms):
Faults A 01-02-03
Position the function selector to
the required position (summer mode) or
If the reset attempts do not reactivate the boiler, contact the Technical As-
sistance Centre.
Fault A 04
In addition to the fault code, the digital display shows the symbol
Check the pressure value indicated by the water gauge:
if it is less than 0.3 bar, position the function selector to
just the filling tap until the pressure reaches a value between 1 and 1.5 bar.
Then position the mode selector to the desired position
(winter).
The boiler will perform one purge cycle lasting approximately 2 minutes.
If pressure drops are frequent, request the intervention of the Technical
Assistance Service.
Fault A 06
The boiler operates normally but cannot reliably maintain a constant do-
mestic hot water temperature, which remains set at around 50°C. Contact
the Technical Assistance Centre.
Fault A 07
Contact the Technical Assistance Centre.
Fault A 08
Contact the Technical Assistance Centre.
Fault A 09 with fixed red LED lit
Position the function selector to
the required position (summer mode) or (winter mode).
If the reset attempts do not reactivate the boiler, request the intervention of
the Technical Assistance Service.
Fault A 09 with flashing red and green LEDs
The boiler is equipped with an auto-diagnostic system which, based on the
total number of hours in certain operating conditions, can signal the need
to clean the primary exchanger (alarm code 09 with flashing red and green
LEDs and flue gas meter >2,500).
Once the cleaning operation has been completed, using the special kit
supplied as an accessory, the total hour meter will need to be reset to zero
as follows:
- switch off the power supply
- remove the housing
- loosen the fixing screw then turn the instrument panel
- loosen the fixing screws on the cover (F) to access the terminal board
(fig. 16)
- while the boiler is powered up, press and hold the CO button (fig. 26) for
at least 4 seconds, to check the meter has been reset, power down then
power up the boiler; the meter reading is shown on the monitor after the
"-C-" sign.
Live electrical parts (230 V AC).
Note: the meter resetting procedure should be carried out after each in-
depth cleaning of the primary exchanger or if this latter is replaced. To
check the status of the total hour meter, multiply the reading by 100 (e.g.
reading of 18 = 1800 total hours; reading of 1 = 100 total hours).
The boiler continues to operate normally even when the alarm is activated.
Fault A77
This is an automatic-reset fault, if the boiler does not restart, contact the
Technical Assistance Centre.
Fixed yellow LED
Pre-heating function activated
Flashing yellow LED
Combustion analysis in progress.
4.4 Boiler configuration
There is a series of jumpers (JPX) available on the electronic board which
enable the boiler to be configured.
To access the board, proceed as follows:
- turn off the main switch on the system
- loosen the fixing screws on the housing, move the base of the housing
forwards and then upwards to unhook it from the chassis
- undo the fixing screws (E) from the instrument panel (fig. 14)
- loosen the screws (F - fig. 16) to remove the cover of the terminal board
(230V)
10
(OFF), wait 5-6 seconds then set it to
(winter mode).
(OFF) and ad-
(summer) or
(OFF), wait 5-6 seconds then set it to
JUMPER JP7 - fig. 37:
preselection of the most suitable heating temperature adjustment field ac-
cording to the installation type.
Jumper not inserted - standard installation
Standard installation 40-80°C
Jumper inserted - floor installation
Floor installation 20-45°C.
In the manufacturing phase, the boiler is configured for standard installa-
tions.
JP1 Calibration (Range Rated)
JP2 Reset heating timer
JP3 Calibration (see paragraph on "Adjustments")
.
JP4
Absolute domestic hot water thermostat selector
JP5
Do not use
JP6 Enable night-time compensation function and continuous pump (only
with external sensor connected)
JP7 Enable management of low temperature/standard installations (see
above)
JP8 Do not use
4.5 Setting the thermoregulation (graphs 1-2-3)
The thermoregulation only operates with the external sensor connected;
once installed, connect the external sensor (accessory available on request)
to the special terminals provided on the boiler terminal board (fig. 5).
This enables the THERMOREGULATION function.
Selecting the compensation curve
The compensation curve for heating maintains a theoretical temperature
of 20°C indoors, when the external temperature is between +20°C and
-20°C. The choice of the curve depends on the minimum external temper-
ature envisaged (and therefore on the geographical location), and on the
delivery temperature envisaged (and therefore on the type of system). It is
carefully calculated by the installer on the basis of the following formula:
KT=
Tshift = 30°C standard installations
25°C floor installations
If the calculation produces an intermediate value between two curves, you
are advised to choose the compensation curve nearest the value obtained.
Example: if the value obtained from the calculation is 1.3, this is between
curve 1 and curve 1.5. Choose the nearest curve, i.e. 1.5.
Select the KT using trimmer P3 on the board (see multiwire wiring dia-
gram).
To access P3:
- remove the housing,
- loosen the fixing screw on the instrument panel
- turn the instrument panel towards you
- loosen the fixing screws on the terminal board cover
- unhook the board casing
Live electrical parts (230 V AC).
The KT values which can be set are as follows:
standard installation: 1.0-1.5-2.0-2.5-3.0
floor installation 0.2-0.4-0.6-0.8
and these are displayed for approximately 3 seconds after rotation of the
trimmer P3.
TYPE OF HEAT REQUEST
Boiler connected to room thermostat (JUMPER 6 not inserted)
The heat request is made by the closure of the room thermostat contact,
while the opening of the contact produces a switch-off. The delivery tem-
perature is automatically calculated by the boiler, although the user may
modify the boiler settings. Using the interface to modify the HEATING, you
will not have the HEATING SET-POINT value available, but a value that
you can set as preferred between +5 and -5°C. The modification of this
value will not directly modify the delivery temperature, but will automati-
cally affect the calculation that determines the value of that temperature,
altering the reference temperature in the system (0 = 20°C).
Boiler connected to a programmable timer (JUMPER JP6 inserted)
With the contact closed, the heat request is made by the delivery sen-
sor, on the basis of the external temperature, to obtain a nominal indoor
temperature on DAY level (20°C). With the contact open, the boiler is not
switched off, but the weather curve is reduced (parallel shift) to NIGHT
level (16°C).
This activates the night-time function.
The delivery temperature is automatically calculated by the boiler, al-
though the user may modify the boiler settings.
envisaged delivery T. - Tshift
20- min. envisaged external T.