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table 2

MINIMUM NUMBER
OF FAN ROTATIONS

METHANE
GAS (G20)

LIQUID GAS

(G31)

G25

rpm

table 3

Max. CO2

METHANE
GAS (G20)

LIQUID GAS

(G31)

G25

8,8

table 4

Min. CO2

METHANE
GAS (G20)

LIQUID GAS

(G31)

G25

8,8

4.7 Gas conversion (fi g. 34)

Conversion from a family gas to other family gas can be performed easily also
when the boiler is installed.
This operation must be carried out by professionally qualifi ed personnel.
The boiler is designed to operate with methane gas (G20) according to the pro-
duct label.
It is possible to convert the boiler to another gas, using the special kit.
For disassembly, refer to the instructions below:
-  remove power supply from the boiler and close the gas tap
-  remove the casing
-  remove the gas pipe (A) - fi g. 34
-  remove the nozzle (B) - fi g. 34 - contained in the gas train, and replace it with

the one supplied

- reassemble the gas train
- re-power the boiler and turn on the gas tap

Conversion must be carried out by qualifi ed personnel.

After conversion, adjust the boiler again (observing the “Adjust-
ments” section) and apply the new identifi cation label contained in
the kit.

4.8 Checking the combustion parameters (chimney sweep fun-
ction)

To carry out the combustion analysis, proceed as follows:
- turn the function selector in OFF position
- turn the chimney sweep selector from position

to position (fi g. 25)

Live electrical parts (230 V AC).

- Wait for burner ignition (about 6 seconds). The display shows “ACO”, the yel-

low LED fl ashes and the boiler operates at maximum heat output.

- insert the analyser probe in the ports provided in the air distribution box, after

removing the screws from the cover (fi g. 33)

- check that the CO2 values match those given in the table, if the value shown is

diff erent, change it as indicated in the chapter entitled “Gas valve calibration”.

- perform the combustion check.

Then:
- remove the analyser probe and close the sockets for combustion analysis with

the special screw

The

fl ue gas analysis probe must be fully inserted as far as possible.

IMPORTANT

- Even during the combustion analysis phase, the function that switches the

boiler off when the water temperature reaches the maximum limit (about
90°C) remains enabled.

- The combustion analysis function remains active for 15 minutes; it is possible

to interrupt it in advance moving the chimney sweep selector in

position.

5 MAINTENANCE

To ensure product characteristics and effi

ciency remain intact and to comply

with prescriptions of current regulations, it is necessary to render the appliance
to systematic checks at regular intervals.
When carrying out maintenance work, observe the instructions given in the
“Warnings and safety” chapter.
Turn off the appliance to carry out the maintenance of the structure near the fl ue
discharge connections or devices, and their accessories. Once the interventions
are completed, a qualifi ed technician must check that the pipes and the devices
work correctly.

IMPORTANT

: before carrying out any cleaning or maintenance operation of the

appliance, use the appliance and system switch to interrupt power supply and
close the gas supply turning the tap placed on the boiler.

Routine maintenance

This normally means the following tasks:
-   removing any oxidation from the burner;
-   removing any scale from the heat exchangers;
-   removing any residue from the condensate drainage pipe;
-   checking and cleaning the drainage pipes;
-   checking the external appearance of the boiler;
-   checking the ignition, switch-off  and operation of the appliance, in both do-

mestic 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-fl ame detection glowplug;
-   checking the gas failure safety device.
Do not clean the appliance or its parts with easily infl ammable substances (e.g.
benzine, alcohol, etc.).
Do not clean panels, painted parts or plastic parts with paint thinner.
Panel cleaning must be carried out only with soapy water.

Extraordinary maintenance

These tasks restore appliance operation in accordance with the design and regu-
lations - 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.

During the initial installation phase, or in the event of extraordinary
maintenance, you are advised to activate the procedure to discharge air
from the heating circuit and boiler (see the relevant paragraph).

6 SERIAL NUMBER

Heating

function

Nominal heat delivery

Nominal heat output

Degree of Protection

Pms

Maximum heating pressure

T Temperature

ŋ Performance

NOx NOx

class