Routine Maintenance; Extraordinary Maintenance - Beretta CIAO AT 25 C.S.I. Manuel D'installation Et D'utilisation

Disconnect the pressure gauge and re-tighten the pressure test point
screw.
To finish the calibration function without storing the set values, proceed
as follows:
a) set the function selector to
b) remove power supply voltage
c) remove JP1/JP2
The calibration function is automatically finished, without storing
minimum and maximum values, after 15 minutes of its activation.
The function is automatically finished also in case of definitive
stop or lockout. Also in this case, function conclusion DOES NOT
provide values storing.
Note
To calibrate maximum heating only, you can remove jumper JP2 (to
store the maximum) and then quit the function without storing the min-
imum, bringing the function selector to
power supply to the boiler.
After each intervention on the adjustment element of the gas
valve, seal it with sealing varnish.
When adjustment is complete:
- bring the temperature set via the ambient thermostat back to the
required value
- bring the heating water temperature selector to the required position
- close the control panel
- replace the housing.
4.6 Gas conversion operations
Conversion from a family gas to other family gas can be performed
easily also when the boiler is installed.
The boiler is supplied for operation with methane gas (G20), but it can
be converted to LPG (G31). It is pre-adjusted in the factory (as shown
on the technical label) and so does not required any further calibration.
Proceed as follows:
- disconnect the boiler from the electricity supply and turn off the gas tap
- remove in the following order: housing, air distribution box cover and
combustion chamber cover (fig. 41)
- disconnect the glowplug cable connection
- remove the lower cable grommet from its seat on the air distribution box
- remove the burner fixing screws and then remove the burner with the
glowplug still attached and with the relative cables
- using a socket or fork spanner, remove the nozzles and the washers
and replace them with the ones in the kit (fig. 42)
Use and assemble the washers contained in the kit also in
case of manifolds without washers.
- replace the burner in the combustion chamber and tighten the screws
that fix it to the gas manifold
- place the cable grommet with the glowplug cable in its seat on the
air distribution box
- reconnect the glowplug cable
- replace the combustion chamber cover and the air distribution box
cover
- tip the control panel towards the front of the boiler
- remove the terminal board cover
- on the control card (fig. 43):
- if the conversion is from methane gas to LPG, insert the jumper in
position JP3
- if the conversion is from LPG to methane gas, remove the jumper
from position JP3
- reposition the previously removed components
- restore voltage to the boiler and turn on the gas tap (with the boiler
operating, check correct seal of the gas feeding circuit connections).
Conversion must be carried out by qualified personnel.
Once the conversion has been made, adjust the boiler again
as indicated in the specific paragraph, and attach the new
identification label included with the kit (red for LPG or yel-
low for MTN).
5 - MAINTENANCE
To ensure product characteristics and efficiency remain intact and to
comply with prescriptions of current regulations, it is necessary to ren-
der the appliance to systematic checks at regular intervals.
Control frequency depends on the installation and use conditions, but
an annual check-up performed by authorised Technical Assistance
Service personnel is advisable.
All manuals and user guides at all-guides.com
OFF
(OFF) or disconnecting the
Turn off the appliance before carrying out work or maintenance of
structures near the flue discharge connections and/or fume discharge
devices and their accessories. Once work is completed, a qualified
technician must check the efficiency of the appliance.
IMPORTANT: before carrying out any cleaning or maintenance work
on the appliance, use appliance and system switches to interrupt pow-
er supply and close the gas supply turning the tap placed on the boiler.

5.1 Routine maintenance

This normally means the following tasks:
- removing any oxidation from the burner
- removing any scale from the heat exchanger
- checking and cleaning the discharge pipes
- checking the external appearance of the boiler
- checking the ignition, switch-off and operation of the appliance, in
both domestic water mode and heating mode
- checking the seal on the gas and water couplings and pipes
- checking the gas consumption at maximum and minimum output.
- checking the position of the ignition-flame detection glowplug
- checking the "no gas" safety system
Do not clean the appliance or its parts with inflammable substances
(e.g. petrol, alcohol, etc.).
Do not clean panels, painted parts and plastic parts with paint thinner.
Panel cleaning must be carried out only with soapy water.

5.2 Extraordinary maintenance

These tasks restore appliance operation in accordance with the design
and regulations - e.g. following the repair of an accidental fault.
This normally means:
- replacement
- repair
- overhaul of components.
These tasks require special means, equipment and tools.
After routine and extraordinary maintenance operations have
been carried out, fill the siphon, following the instructions in the
section "Preliminary checks".
5.3 Check the combustion parameters
To carry out the combustion analysis, proceed as follows:
- open the hot water tap to its maximum output
- set the function selector to summer
ture selector to the maximum value (fig. 44)
- insert the analyser probes in the specific positions on the air distribution
box, after removing the screws (fig. 45)
- power the boiler
- the appliance works at maximum output and you can check combustion.
After analysis is complete:
- turn off the hot water tap
- remove the analyser probe and close the combustion analysis inlet,
carefully replacing the previously removed screws.
6 - SERIAL NUMBER
Domestic hot water operation
Heating operation
Qn
Heat input
Qm Reduced heat delivery
Pn
Heat output
Pm Reduced heat output
IP Protection level
Pmw Maximum DHW pressure
Pms Maximum heating pressure
T Temperature
D Specific capacity
NOx NOx class
Via Risorgimento 13 - 23900 Lecco (LC) Italy
D:
Serial N. COD.
NOx:
230 V ~ 50 Hz W
Pmw = bar T= 60 °C
IPX5D
B22 -B52 -C12-C22-C32-C42-C52-C62-C82
P P
C92-C12x-C32x-C42x-C52x-C62x-C82x-C92x
Pms = bar T= 90 °C
CIAO AT C.S.I.
(fig. 44) and the DHW tempera-
80-60 °C 80-60 °C 50-30 °C
Qn = kW Qm = kW
Qn = kW
Pn = kW Pn = kW
Pm = kW Pn = kW
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