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ENGLISH
3.5 Gas connection
Before connecting the appliance to the gas network, check that:
- national and local regulations are complied
- the gas type is the one suitable for the appliance
- the piping is clean.
The gas pipe must be installed outdoor. If the pipe goes through the
wall, it must go through the central opening, in the lower part of the
template. It is advisable to install a filter of suitable dimensions on
the gas line if the distribution network had solid particles.
Once the appliance has been installed check that connections are
sealed according to current installation regulations.
3.6 Fumes exhaustion and air suction
Observe applicable legislation regarding flue gas exhaustion.
The exhaust system must be made using rigid ducting, the joints
between elements must be hermetically sealed and all components
must be resistant to heat, condensation and mechanical stress and
vibration.
Non insulated outlet pipes are potential sources of danger.
The apertures for the combustion air must be realised in compliance
with applicable legislation. If condensation forms, the exhaust duct
must be insulated.
Figure 12 shows a top-down view of the boiler with the dimensions
for the flue gas exhaust outlet.
Flue gas safety system
The boiler features a system monitoring that flue gases are correctly
exhausted which arrests the boiler in the event of a fault: flue gas
thermostat - fig. 11. To restore normal operation, turn the function
selector to
(3 - fig.1a), wait a few seconds, then turn the function
selector into the desired position.
If the fault persists, call a qualified technical from the Technical
Support Service. The flue gas exhaustion monitoring system must
never be bypassed or rendered inoperable. Use only original
replacement parts when replacing the whole system or faulty
system components.
3.7 Filling the heating system (fig. 13)
Once the hydraulic connections have been carried out, fill the
heating system. This operation must be carried out with cold
system following this instructions:
- turn by two or three turns the automatic relief valve cap (
I
)
- make sure the cold water inlet tap is open
- turn on the filling tap (
L
) until the pressure indicated by the water
pressure gauge is between 1 and 1.5 bar.
Once filling is complete, close the filling tap.
The boiler has an efficient air separator so no manual intervention
is needed. The burner switches on only if the air relief phase is
finished.
3.8 Emptying the heating system (fig. 13)
To empty the system, proceed as follow:
- switch off the boiler
- loose the boiler outlet tap (
M
)
- empty the lowest points of the system.
3.9 Emptying the domestic hot water (fig. 13)
When there is risk of frost, the domestic hot water system must be
emptied in the following way:
- close the main tap of the water mains
- open all the hot and cold water taps
- empty the lowest points.
WARNING
When carrying out the discharge of the safety valve (
N
), it must be
connected to a suitable collection system. The manufacturer is not
responsible for possible damages due to safety valve operation.
4 - IGNITION AND OPERATION
4.1 Preliminary checks
First ignition is carried out by competent personnel from an
authorised Technical Assistance Service Beretta.
Before starting up the boiler, check:
a) that the supply networks data (electric, water, gas) corresponds
to the label data
b) that piping leaving the boiler is covered by thermal insulation
sheath
c) that flue gas extraction and air suction pipes work correctly
d) that conditions for regular maintenance are guaranteed if the
boiler is placed inside or between furniture
e) the seal of the fuel adduction system
f) that fuel capacity corresponds to values requested by the boiler
g) that the fuel supply system has the correct capacity for the
necessary capacity to the boiler and that it has all the safety
and control devices prescribed by current regulations.
4.2 Appliance ignition
To start-up the boiler it is necessary to carry out the following
operations:
- power the boiler
- open the gas tap present in the system to allow fuel flow
- turn the mode selector (3 - fig. 1a) to the desired position:
Summer mode:
turning the selector to the symbol summer
(fig. 2a) the traditional function of only domestic hot water
is activated. If there is a domestic hot water request, the boiler
status indicator LED lights up with a fixed green light. The digital
display shows the hot water system temperature, the icon to
indicate the hot water supply and the flame icon (fig. 4a)
.
Winter mode:
by turning the mode selector
within the area
divided into segments (fig. 2b), the boiler provides domestic hot
water and heating. If there is a heat request, the boiler switches
on and
the boiler status indicator LED lights up with a fixed green
light. The digital display indicates the heating water temperature,
the icon to indicate heating and the flame icon (fig. 3a)
.
If there
is a domestic hot water request, the boiler switches on and
the
boiler status indicator LED lights up with a fixed green light.
The
digital display shows the hot water system temperature, the icon
to indicate the hot water supply and the flame icon (fig. 4a).
Pre-heating (faster hot water):
rotate the domestic hot water
temperature adjustment knob (4 - fig. 1a) to the
symbol (fig.
5a), to activate the pre-heating function. This function keeps the
water in the domestic hot water exchanger hot, to reduce standby
times when a request is made. When the pre-heating function is
enabled, the yellow LED next to the
symbol is lit.
The monitor
indicates the delivery temperature of the heating water or the
domestic hot water, according to the current request. During burner
ignition following a pre-heating request, the monitor indicates the
symbol (fig. 5b). To deactivate the pre-heating function, rotate
the domestic hot water temperature adjustment knob back to the
symbol. T
he yellow LED will switch off. Bring the domestic
hot water temperature adjustment knob back to the required
position. This function cannot be activated when the boiler is
OFF: function selector (fig.6b) on OFF.
Adjustment of the heating water temperature
To adjust the heating water temperature, turn the knob with symbol
within the area divided into segments (fig. 2b).
Adjustment of domestic hot water temperature
To adjust domestic water temperature (bathrooms, showers,
kitchen, etc.), turn the knob with symbol (fig. 8a)
within the area
marked 1 and 6
. Rotate clockwise to increase the temperature and
anticlockwise to reduce it.
On the control panel, the green LED
flashes with ON for 0.5 seconds, OFF for 3.5 seconds
The boiler is stand-by status until, after a heat request, the burner
switches on and the
indicator LED turns fixed green to indicate flame
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 stand-by.
If the red LED indicator near the
symbol on the control panel
lights up, this means the boiler is in temporary stop status (see
chapter "Light signals and faults"). The digital monitor indicates the
fault code detected (fig. 6a).
Automatic Adjustment Control System Function (S.A.R.A.) fig. 7a
By setting the heating water temperature selector to the area
marked by AUTO - temperature value from 55 to 65°C - the
S.A.R.A. self-adjusting system is activated, the green LED flashes
(frequency 0.1 sec. on; then 0.1 sec. off; for 0.5 seconds): the boiler
varies the delivery temperature according to the closing signal of
the room thermostat. When the temperature set with the heating
water temperature selector is reached, a 20 minutes count begins.
If during this period the room thermostat still requests heat, the
value of the set temperature automatically increases by 5 °C.
When the new value is reached, other 20 minutes count begins.
If during this period the room thermostat still requests heat, the
value of the set temperature automatically increases by 5 °C.
