Beretta Mynute Green 25 C.S.I. E Manual De Instalacion Y Uso página 14

Mynute Green C.S.I. E - R.S.I. E
RANGE RATED
This boiler can be adapted to the heating requirements of the sys-
tem, in fact it is possible to set the maximum delivery for heating
operation of the boiler itself:
- switch off the power supply
- setting the heating water temperature selector at the maximum
value
- remove the shell
- turning the instrument panel towards you
- unscrew the two screws of the small cover on the electronic
board to have access to the terminals
- insert JP1 jumper
- power up the boiler.
The display shows "ADJ" for about 4 sec.: it is then possible to
change the maximum heating value by means of the heating water
temperature selector and the CO button in order to set and confirm
the desired value.
The icon will appear on the display.
Finish the procedure by removing the jumper JP1 to store the set
values.
Once the desired output (maximum heating) has been set, note the
value on the table on the back cover.
For subsequent controls and adjustments, refer to the set value.
The calibration does not entail the ignition of the boiler. By ro-
tating the heating setpoint selector knob, the value expressed
in hundreds (e.g. 25 = 2500 rpm) is automatically displayed.
The boiler is supplied with the adjustments shown in the table.
Depending on plant engineering requirements or regional flue gas
emission limits it is, however, possible to modify this value, refer-
ring to the graphs below.
4.8 Gas conversion (fig. 22)
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 LPG, 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 the housing
- 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
- re-power the boiler and turn on the gas tap.
Adjust the boiler as described in the chapter entitled "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.
If you need to convert Mynute Green 25 C.S.I. - 25 R.S.I.
(clapet inside) from natural gas to other types of gas
you MUST remove the clapet and put the new gasket
contained into the conversion kit.
If you need to convert Mynute Green 25 C.S.I. - 25 R.S.I.
from other gas types to natural gas you need to regulate
G20 values as follows:
Numbers of fan revolutions at slow start
Maximum number of fan rotation (CH-DHW)
Minimum number of fan rotation (CH-DHW)
14
G20
rpm/min 3.400
rpm/min 5.600
rpm/min 1.800
4.9 Checking the combustion parameters (fig. 21)
Mynute Green C.S.I. E:
- Position the function selector on
- Turn the DHW temperature selector on
Wait until the ignition of the burner (about 6 seconds). The dis-
play shows "ACO", the boiler operates at full power heating.
- Remove the screw C and the cover E on the air box.
- 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 values match those given in the table, if the
2
value shown is different, change it as indicated in the chapter
entitled "Gas valve calibration".
MAXIMUM CO
2
25 C.S.I.
30 C.S.I.
38 C.S.I.
MINIMUM CO
2
25 C.S.I.
30 C.S.I.
38 C.S.I.
Mynute Green R.S.I. E:
- Position the function selector on
- Turn the DHW temperature selector on
Wait until the ignition of the burner (about 6 seconds). The dis-
play shows "ACO", the boiler operates at full power heating.
- Remove the screw C and the cover E on the air box.
- 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 values match those given in the table, if the
2
value shown is different, change it as indicated in the chapter
entitled "Gas valve calibration".
MAXIMUM CO
2
12 R.S.I.
15 R.S.I.
25 R.S.I.
35 R.S.I.
MINIMUM CO
2
12 R.S.I.
15 R.S.I.
25 R.S.I.
35 R.S.I.
- 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 between the "+" and "-".
Then:
- remove the analyser probe and close the sockets for combustion
analysis with the special screw
- close the instrument panel and refit the housing.
to switch off the boiler
.
METHANE LIQUID GAS
GAS (G20) (G31)
9,0 10,0 %
9,0 10,0 %
9,5 10,5 %
METHANE LIQUID GAS
GAS (G20) (G31)
9,5 10,0 %
9,5 10,5 %
9,5 10,5 %
to switch off the boiler.
.
METHANE LIQUID GAS
GAS (G20) (G31)
9,0 10,0 %
9,0 10,0 %
9,0 10,0 %
9,0 10,0 %
METHANE LIQUID GAS
GAS (G20) (G31)
9,5 10,0 %
9,5 10,0 %
9,5 10,0 %
9,5 10,0 %