Gas Conversion - Beretta Mynute Green 50 R.S.I Installation And User Manual

4.8 Gas conversion

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 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:
- remove power supply from the boiler and close the gas tap
- loosen the three fixing screws of the upper cover, and the two lower screws
that fix the casing
- remove the cover and casing
- remove the gas train (A) - fig. 34
- remove the nozzle (B) - fig. 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 qualified personnel.
After conversion, adjust the boiler again (observing the "Adjust-
ments" section) and apply the new identification label contained
in the kit.
5 - MAINTENANCE
To ensure product characteristics and efficiency remain intact and to com-
ply 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
flue discharge connections or devices, and their accessories. Once the in-
terventions are completed, a qualified 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
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 gas failure safety device.
Do not clean the appliance or its parts with easily inflammable 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
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.
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).
5.1 Checking the combustion parameters
To carry out the combustion analysis, proceed as follows:
- loosen the three fixing screws of the upper cover, and the two lower screws
that fix the casing
- remove the cover and casing
- insert the analyser probes in the flue gas inlet (A) and air inlet (E) in the
boiler, after removing the screw B, the plug C and the plug D (fig. 35).
The flue gas analysis probe must be fully inserted as far as pos-
sible
- tighten the analyser sealing screw in the flue gas analysis inlet hole
- loosen the fixing screws (E) on the instrument panel (fig. 20)
- lift then turn the instrument panel towards you
12
- loosen the fixing screws on the cover (F) to access the terminal board
(fig. 22)
- Press the "CO" button (fig. 37)
Live electrical parts (230 V AC).
- Wait for burner ignition. The display shows "ACO", the yellow LED flash-
es and the boiler operates at maximum heat output.
- check that the CO2 values match those given in the table, if the value
shown is different, change it as indicated in the chapter entitled "Gas
valve calibration".
- perform the combustion check.
Then:
- remove the analyser probes and replace the plugs that you removed earlier
- close the instrument panel and refit the housing
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.
5.2 Serial number
Heating function
Qn Nominal heat delivery
Pn Nominal heat output
Qm Reduced heat delivery
Pm Reduced heat output
IP Degree of Protection
Pms Maximum heating pressure
T Temperature
ŋ Performance
NOx NOx class
Condensing Boiler
N.
00000000000
230 V ~ 50 Hz W
Pms = bar T= 90 °C
****
Gas type:
Gas category:
80-60 C
80-60 C
Qm
Qn =
Pm Pn
Pn =
50-30 C