Gas Conversion - Beretta POWER GREEN 50 Installation And User Manual

Exit the CALIBRATION & SERVICE functions by pressing the ESCAPE key.
After each intervention on the adjustment element of the gas valve,
seal it with sealing varnish.
When adjustment is complete:
- restore set temperature with the ambient thermostat to the desired tem-
perature
- close the instrument panel
- replace the casing
- reposition and fix the upper cover
The boiler is supplied with the adjustments shown in the table. Depending
on plant engineering requirements or regional flue gas emission limits
however, it is possible to modify this value, referring to the charts on the
right.

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
supplied.
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.50
- remove the nozzle (b) - Fig.50 - 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.
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 interventions 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.
18
Thermal output curve - emissions (Qnrisc)
Power Green 50
200
190
180
170
160
150
140
130
120
110
100
90
80
70
60
50
40
30
20
10
0
8 10 12 14 16 18 20 22
Thermal heating output (kW)
Thermal output curve - no. of fan rotations (Qnrisc)
Power Green 50
6000
5600
5200
4800
4400
4000
3600
3200
2800
2400
2000
1600
1200
8 10 12 14 16 18 20 22
Thermal heating output (kW)
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).
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.
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
- access the CALIBRATION & SERVICE phase by setting the combustion
analysis password as indicated in the "Adjustments" chapter
- the first display will show the number of rotations corresponding to the
maximum heating output, at which the boiler has been set (see "adjust-
ments" item P23).
When the domestic water temperature selector is rotated again, the boiler
ignites for the combustion check.
- perform the combustion check.
If the boiler needs to be calibrated, refer to the "Adjustments" chapter
- remove the analyser probes and replace the plugs that you removed
earlier
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.
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