Beretta MYNUTE GREEN 50 R.S.I. Manuel D'utilisation page 10

- Insert the analyser probe in the ports provided, after removing the screws
from the cover (fig. 35).
- Press the "combustion analysis" button a second time to reach the num-
ber of rotations corresponding to the maximum domestic hot water output
(table 1); the yellow LED continues to flash while the red LED is fixed.
- Check the CO value: (table 3) if the value does not match the value
2
given in the table, use the gas valve maximum adjustment screw.
- Press the "combustion analysis" button a third time to reach the number
of rotations corresponding to the minimum output (table 2); the yellow
LED continues to flash while the green LED is fixed.
- Check the CO value: (table 4) if the value does not match the value
2
given in the table, use the gas valve minimum adjustment screw.
- To exit the "combustion analysis" function, turn the control knob.
- Remove the flue gas probe and refit the plug.
- Close the instrument panel and refit the housing.
The "combustion analysis" function is automatically deactivated if the board
triggers an alarm. In the event of a fault during the combustion analysis
cycle, carry out the reset procedure.
table 1
MAXIMUM NUMBER OF
FAN ROTATIONS
table 2
MINIMUM NUMBER OF
FAN ROTATIONS
table 3
Max. CO
2
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, referring to the graphs below.
HTG curve (Qnheating)
6000
5600
5200
4800
4400
4000
3600
3200
2800
2400
2000
1600
1200
8 12 16
10
METHANE LIQUID GAS
GAS (G20) (G31)
58 57
METHANE LIQUID GAS
GAS (G20) (G31)
13 16
METHANE LIQUID GAS
GAS (G20) (G31)
9,0 10,0
20 24 28 32
Heat output (kW)
RANGE RATED
This boiler can be adapted to the plant's thermal need, in fact, the maxi-
mum flow rate can be set for the boiler's heating function:
- Disconnect the power supply to the boiler.
- Turn the heating water temperature selector to the maximum value.
- Lift and rotate the control panel towards you.
- Remove the cover by releasing the fixing hooks.
- Insert jumper JP1 (fig. 50).
- Put the power to the boiler on.
The three LEDs on the control panel flash alternately and an "ADJ" messa-
ge is shown on the display for about 4 sec, after which the maximum hea-
ting value can be changed using the heating temperature selector and CO
button (fig. 37) to set and confirm the required value. The display shows
the icon . End the procedure by removing jumper JP1 to save the values
set in the memory.
Once the required (maximum heating) power is set indicate the value
on the instruction manual (see back cover). For subsequent checks and
adjustments, see the value set. Setting does not switch on the boiler. When
the heating setpoint selector knob is turned the display automatically shows
the number of rpm expressed in hundreds (e.g. 25 = 2500 rpm).
table 4
rpm
Min. CO
rpm
table 5
SLOW IGNITION
%
36 40 44 48
200
190
180
170
160
150
140
130
120
110
100
90
80
70
60
50
40
30
20
10
0
8 12 16
METHANE
GAS (G20)
2
9,5
METHANE
GAS (G20)
30
COs.a. curve (Qnheating)
20 24 28 32
Heat output (kW)
LIQUID GAS
(G31)
10,0 %
LIQUID GAS
(G31)
30 rpm
36 40 44 48