Maintenance Indicator - Beretta CIAO AT Installer And User Manual

- Press the CH+ and MODE buttons simultaneously for 5 seconds. The display shows
the message "Auto" (alternating). Wait for the burner to start, which is signaled by the
presence of the symbol .
b
The system deletes the old q01/q02 values.
b
The new initial q01/q02 values are automatically assigned based on the quality of
the fl ame and the performance of the gas valve. If the system does not detect the
fl ame signal, the lockout condition is detected and the parameters are not saved. It
is then necessary to repeat the procedure.
- The display shows q02 fl ashing.
- Press MODE to modify the q02 value.
- Press the DHW+/- button to adjust the q02 parameter until the maximum nominal
pressure specifi ed in the multigas tables is reached on the pressure gauge.
- Wait 10 seconds for the pressure to stabilise; if the pressure read on the pressure gauge
is different from the maximum nominal pressure, proceed by pressing the DHW+/- button
to adjust parameter q02. After each modifi cation, wait 10 seconds for the pressure to
stabilise. The value of the "q02" parameter is automatically saved.
- It is very important that the q02 value does not exceed the maximum nominal pres-
sure (see multigas table): if it does, the procedure must be repeated.
- Press RESET to exit q02 modifi cation.
- Press the CH+/- button to select the q01 parameter. The modulation current is forced on
the default q01 parameters.
- Press MODE to modify the q01 value.
- Press the DHW+/- button to adjust the q01 parameter until the minimal nominal pressure
is reached on the pressure gauge.
- Wait 10 seconds for the pressure to stabilise; if the pressure read on the pressure gauge
is different from the minimum nominal pressure, proceed by pressing the DHW+/- button
to adjust parameter q01. After each modifi cation, wait 10 seconds for the pressure to
stabilise. The value of the q01 parameter is automatically saved.
- It is very important that the q01 value does not fall below the minimum nominal
pressure (see multigas table): if it does, the procedure must be repeated.
- Press RESET to exit q01 modifi cation.
- Check both settings again by pressing the CH+/- buttons, with MODE you can see the
q01 and q02 values, whereas with RESET you will quit the page. If necessary, correct the
values by repeating the above procedure.
- The calibration procedure ends automatically after 15 minutes or by simultaneously
pressing the CH+ and MODE buttons for 5 seconds.
- After making the necessary adjustments, disconnect the power supply to the boiler and
then reconnect it so that parameter P19 = 0 (default value).
4.16.2 Limited range adjustment
THIS PROCEDURE MUST BE PERFORMED ONLY TO MAKE LIMITED SYSTEM AD-
JUSTMENTS, FOR EXAMPLE SMALL CORRECTIONS ARISING FROM THE NEED FOR
ADJUSTMENT DURING FLUE GAS ANALYSIS.
- Place the boiler in winter mode.
- Press the RESET and MODE buttons simultaneously for 5 seconds.
- The boiler will switch on at max. power, the display will show the value 100 and the
symbols will fl ash.
- Press the MODE button for 2 seconds to enter automatic confi guration mode. The
display shows q02.
- Press MODE again to modify the q02 value. Use the pressure gauge to check that the
gas pressure values correspond to those specifi ed in the multigas table; if they do not,
press DHW+/- to modify the parameter value within the range ± 12.
- Press RESET to save and exit from q02.
- Press the CH+/- button to select the q01 parameter.
- Press MODE to modify the q01 value. Use the pressure gauge to check that the gas
pressure values correspond to those specifi ed in the multigas table; if they do not, press
DHW+/- to modify the parameter value within the range ± 12.
- Press RESET to save and exit from q01.
- The combustion analysis mode ends automatically after 15 minutes or by pressing CH+
and MODE button simultaneously for 5 seconds.
After these operations
- disconnect the pressure gauge and re-tighten the pressure test point screw
- reposition the previously removed components.
b
After each intervention on the adjustment element of the gas valve, seal it with
sealing varnish.
4.17 Maintenance
Periodic maintenance is an "obligation" of the regulations in force and is essential for the
safety, effi ciency and durability of the boiler, it also reduces consumption and polluting emis-
sions and keeps the product reliable over time.
b
During maintenance of the boiler, the use of protective clothing is recommended to
avoid personal injury.
Before starting maintenance operations:
- perform the analysis of the combustion products to check the boiler operation status then
cut the electrical supply by turning off the system's general switch
- close the fuel and water taps of the heating and domestic hot water system.
To ensure that product characteristics and effi ciency remain intact and compliance with
current regulations, the appliance must undergo systematic checks at regular intervals. For
maintenance, follow the instructions in the chapter "1 WARNINGS AND SAFETY".
This normally means the following tasks:
- removing any oxidation from the burner;
- removing any scale from the heat exchangers;
- checking the post-exchanger;
- checking siphon fi lling;
12
- 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/fl ame detection glowplug
- checking the gas failure safety device.
b
After routine and extraordinary maintenance operations have been carried out, fi ll
the siphon, following the instructions in the section "4.2 First commissioning".
b
After performing the necessary maintenance operations, the original adjustments
must be restored and the combustion product analysis must be performed to check
the correct operation.
a
Do not clean the appliance or its parts with infl ammable substances (e.g. petrol,
alcohol, etc.).
a
Do not clean panels, painted parts and plastic parts with paint thinner.
a
Panel cleaning must be carried out only with soapy water.
4.18

Maintenance indicator (

The key symbol on the display indicates that 52 weeks have passed since the
previous maintenance work or initial start-up, and the intervention of professionally
qualifi ed personnel is called for.
In the INFO MENU (see paragraph "4.12 Info menu (In)") you can see the number of
weeks left before maintenance is required.
Resetting the maintenance countdown
Once maintenance has been carried out, press the DHW+ and DHW- buttons
simultaneously to reset the week counter, which will thus return to 52.
The symbol will disappear from the display.
4.19 Cleaning the boiler and dismantling the internal
components
Before any cleaning operation, switch off the electrical supply by turning the system's main
switch to "Off".
OUTDOOR
Clean the casing, the control panel, the painted parts and the plastic parts with a cloths
dipped in soap and water.
In the case of stubborn stains dampen the cloth with a mixture of 50% water and methylated
spirit or with specifi c products.
a
Do not use fuels and/or sponges soaked in abrasive solutions or powder detergents.
INDOOR
Before starting internal cleaning operations:
- Close the gas shut-off valve.
- Close the system taps.
Burner cleaning
- Clean the burner with a soft brush, check and clean the nozzles on the burner manifold.
Check the ignition/detection electrode and replace it if necessary.
- In case of replacement, check the reference dimensions with the ignition/detection elec-
trode paragraph "4.15 Gas conversion".
Exchanger cleaning
- Remove the exchanger and clean it with a soft brush. Check the insulating panels inside
the combustion chamber and replace them if necessary.
Post exchanger cleaning
- Remove the post exchanger body by unscrewing the three fi xing screws, then remove
it (fi g. 14).
- Remove the fan and smoke exhaust gaskets from their seat.
- Plug the fan connection holes, fl ue gas analysis socket and condensate drain of the post
exchanger casing with the plugs supplied in the special kit.
- Place the post exchanger in a vertical position with the smoke outlet facing upwards.
- Fill the post exchanger with white vinegar (about 1.5 liters) and leave to act for about
10 minutes.
- Empty the vinegar and, after removing the caps, rinse with plenty of running water.
- Drain any liquid residues.
b
Reassemble the post exchanger in its seat by proceeding in reverse order.
b
Before proceeding with the assembly, visually check that the fan connection holes, fl ue
gas exhaust, analysis socket and condensate drain are free from any residual of dirt.
b
During cleaning and maintenance operations, always check the absence of deposits
inside the condensate drain of the post exchanger by pouring water inside from the fl ue
gas outlet, or from the fl ue gas analysis outlet, and checking that it is properly evacuated
from the condensate drain itself.
Siphon cleaning
- Remove the siphon. Unscrew the lower cap, then remove the internal capsule including
the seal and fl oat. Clean the parts of the siphon from any solid limestone residues. Care-
fully reposition the previously removed components, check the fl oating seal and replace
it if necessary. After routine and extraordinary maintenance, proceed to refi ll the siphon,
following the indications in paragraph "4.2 First commissioning".
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