Checking The Combustion Parameters - Beretta Ciao Green 25 C.S.I. Manual De Instalacion Y Uso

table 1
MAXIMUM NUMBER OF
FAN ROTATIONS
25 C.S.I. heating - DHW
29 C.S.I. heating - DHW
table 2
MINIMUM NUMBER OF
FAN ROTATIONS
table 3
Max. CO
2
table 4
Min. CO
2
table 5
SLOW IGNITION
4.7 Gas conversion (fig. 42-43)
Gas conversion from one family of gases to another can also be easily
performed when the boiler is installed.
This operation must be carried out by professionally qualified personnel.
The boiler is designed to operate with methane gas (G20) according to the
product label.
It is possible to convert the boiler to propane gas, using the special kit.
For disassembly, refer to the instructions below:
- switch off the power supply to the boiler and close the gas tap
- remove in sequence: housing and air distribution box cover
- remove the fixing screw from the instrument panel
- unhook and turn the instrument panel forwards
- remove the gas valve (A)
- remove the nozzle (B) inside the gas valve and replace it with the nozzle
from the kit
- refit the gas valve
- remove the silencer from the mixer
- open the two half-shells by prising apart the corresponding hooks (C)
- replace the air diaphragm (D) in the silencer
- refit the air distribution box cover
- re-power the boiler and turn on the gas tap
Adjust the boiler as described in the chapter "Adjustments" with reference
to the information on LPG.
Conversion must be carried out by qualified personnel.
Once the conversion is complete, affix the new identification
label supplied in the kit.
METHANE LIQUID GAS
GAS (G20) (G31)
49 - 61 49 - 61
53 - 62 52 - 60
METHANE LIQUID GAS
GAS (G20) (G31)
14 14
METHANE LIQUID GAS
GAS (G20) (G31)
9,0 10,5
METHANE LIQUID GAS
GAS (G20) (G31)
9,5 10,5
METHANE LIQUID GAS
GAS (G20) (G31)
40 40

4.8 Checking the combustion parameters

- Position the function selector on
- Turn the DHW temperature selector on
Wait until the ignition of the burner (about 6 seconds). The display shows
rpm
"ACO", the boiler operates at full power heating.
rpm
- Remove the screw C and the cover E on the air box (fig. 41).
- Insert the probes of the analyzer in the positions provided on the air box.
The flue gas analysis probe must be fully inserted as far as
possible.
- Check that the CO
shown is different, change it as indicated in the chapter entitled "Gas
rpm
valve calibration".
Max. CO
2
%
Min. CO
2
%
- Perform the combustion check.
- Check the flue combustion.
The "combustion analysis" remains active for a time limit of 15 min; in the
event it is reached in a flow temperature of 90 °C the burner shutdown.
It will turn back when this temperature falls below 78 °C.
If you wish to stop the process turn the hot water temperature in the area
rpm
between the "+" and "-".
Then:
- remove the analyser probe and close the sockets for combustion analy-
sis with the special screw
- close the instrument panel and refit the housing.
5 - MAINTENANCE
The appliance must be systematically controlled at regular intervals to
make sure it works correctly and efficiently and conforms to legislative pro-
visions in force.
The frequency of controls depends on the conditions of installation and
usage, it being anyhow necessary to have a complete check carried out
by authorized personnel from the Technical Assistance Service every year.
- Check and compare the boiler's performance with the relative specifica-
tions. Any cause of visible deterioration must be immediately identified
and eliminated.
- Closely inspect the boiler for signs of damages or deterioration, particu-
larly with the drainage and aspiration system and electrical apparatus.
- Check and adjust – where necessary – all the burner's parameters.
- Check and adjust – where necessary – the system's pressure.
- Analyze combustion. Compare results with the product's specification.
Any loss in performance must be identified and corrected by finding and
eliminating the cause.
- Make sure the main heat exchanger is clean and free of any residuals or
obstruction.
- Check and clean – where necessary – the condensation tray to make
sure it works properly.
IMPORTANT: always switch off the power to the appliance and close the
gas by the gas cock on the boiler before carrying out any maintenance and
cleaning jobs on the boiler.
Do not clean the appliance or any latter part with flammable substances
(e.g. petrol, alcohol, etc.).
Do not clean panelling, enamelled and plastic parts with paint solvents.
Panels must be cleaned with ordinary soap and water only.
The flame side of the burner is made of state-of-the-art material.
Being fragile:
- be particularly careful when handling, mounting or dismantling the burner
and adjacent components (e.g. electrodes, insulation panelling etc.)
- avoid direct contact with any cleaning appliance (e.g. brushes, aspira-
tors, blowers, etc.).
to switch off the boiler
.
values match those given in the table, if the value
2
METHANE LIQUID GAS
GAS (G20)
9,0
METHANE LIQUID GAS
GAS (G20)
9,5
ENGLISH
(G31)
10,5 %
(G31)
10,5 %
11