Boiler Functions; Switching Off - Beretta EXCLUSIVE GREEN HE 25 B.S.I. Installer And User Manual

EXCLUSIVE BOILER GREEN HE B.S.I.
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Working the boiler
Adjust the ambient thermostat to the required temperature (approx.
20 °C). If there is a demand for heating water, the boiler starts
and the symbol is shown on the display (fi g. 25). The boiler
will remain working until the set temperatures are reached, after
which it will go on stand-by. In the event of ignition or operating
faults, the boiler will perform a "safety stop".
The fl ame symbol will go out and the fault code and
be displayed (fi g. 26). For a description of faults and how to reset
them, consult chapter "Troubleshooting".
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26

Switching off

Switching off for short periods
For brief absences press the
display will show two segments in the central area (fi g. 27). When
the boiler remains powered with the gas tap open, it is protected
by the following systems:
- anti-freeze: when the temperature of the water in the boiler
falls below safety values, the circulator and the burner work
at minimum power to increase the water temperature to a safe
value (35 °C). The symbol lights up on the display (fi g. 27).
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- circulator anti-block: one operating cycle is performed every
24 hours.
Switching off for long periods
For prolonged absences press the
(fi g. 27). The display will show two segments in the central area.
Turn the main switch to "off".
Turn off the gas tap under the boiler by turning it clockwise (fi g. 28).
tap
closed
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In this case, the anti-freeze and anti-block systems are disa-
bled.
Empty the water circuit or suitably protect it with a good make
of anti-freeze. Drain the domestic hot water circuit.
14
B
button to switch off the boiler. The
button to switch off the boiler

Boiler functions

Semi-automatic fi lling
The boiler features a semi-automatic fi lling device which turns on
by pressing the button when the corresponding symbol
shown on the display (fi g. 29).
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If this condition occurs it means that the system is incorrectly pres-
surised though the boiler will continue to work regularly. Press the
will
circuit fi lling button
Press the circuit fi lling button
fi lling sequence. During fi lling, the drops of the circuit fi lling symbol
and the growing pressure value appear on the display in a
cascade sequence (fi g. 30).
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After fi lling, the symbol is displayed for a few moments and
then turns off.
Note
During fi lling, the boiler does not perform other functions. For
example, if there is a request for domestic hot water, the boiler is
unable to provide it until fi lling has fi nished.
Note
If circuit pressure reaches 0.6 bar, the pressure value fl ashes
on the display (fi g. 31a); if it falls below a minimum safety value
(0.3 bar), fault code 41 appears on the display (fi g. 31b) for a
certain time, following which, if the fault persists, fault code 40
is displayed (see chapter on "Troubleshooting").
31a
31b
In the event of fault 40, press
the circuit. After correcting fault 40, the boiler runs an automatic
vent cycle lasting about 2 minutes; the display reads "SF" (fi g.
32) and the "function selectors"
the button to interrupt the automatic venting
you have to fi ll the system several times, contact the Technical
Service Centre to check whether the heating circuit is watertight
(see if there are any leaks).
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to start-up the fi lling sequence.
a second time to interrupt the
to reset and then
light up in sequence. Press
is
to start fi lling
cycle.
If