Beretta MYNUTE GREEN 28 C.S.I. Manual De Instalacion Y Uso página 19

15
.
It is easy to convert from one gas family to another even after the
boiler has been installed.
This operation must be performed by professionally qualified staff.
The boiler is designed to work with natural gas (G20), as indicated
on the product plate.
The boiler can be converted to propane using the relative kit
supplied as an accessory.
To disassemble, proceed as follows (fig. 38):
- disconnect the boiler from the power supply and close the gas
tap
- remove the shell and cover of the air distribution box
- release the panel and turn it forwards
- remove the gas pipe (D)
- remove the nozzle (E) contained in the gas train and replace it
with the one contained in the kit
- remount the gas train (check that the gas pipe connected to the
fan mixer is in position)
- put back the air distribution box cover
- power the boiler and open the gas tap.
Adjust the boiler as described in the "Adjustments" section, refer-
ring to LPG data.
The boiler may only be converted by qualified staff.
After conversion, apply the new identification plate
contained in the kit.
16
CHECKING COMBUSTION PARAMETERS
.
To analyse combustion, proceed as follows:
- turn the function selector to OFF/RESET (digit "--")
- pull out the central knob (B, fig. 39) on the panel
- press the combustion analysis button (CO, fig. 40)
- insert the analyser probes in the relative positions on the air
distribution box, after removing the screw F and the plug G (fig.
41)
- check that the values of CO
the table.
If the value displayed is different, modify it as indicated in the
"Gas valve calibration" section
- check combustion.
Then:
- remove the analyser probes and close the combustion analysis
taps with the relative screw cap
- put back the central knob B on the panel.
The fumes analysis probe must be fully inserted.
IMPORTANT
The function that switches off the boiler when water temperature
reaches a maximum of about 95°C is still enabled during the
combustion analysis phase.
GAS CONVERSION
correspond to those indicated in
2
B
39
display
KT
A
40
41
17
.
DHW operation
CH operation
Q n nominal capacity
Pn nominal power
IP protection level
P. min minimum pressure
Pmw DHW maximum pressure
Pms CH maximum pressure
T temperature
η η η η η
working efficiency
D specific capacity
NOx NOx value class
condensing boiler
IP
P. min.
N.
230 V ~ 50 Hz
Pmw = 6 bar T= 60 °C
Pms = 3 bar T= 90 °C
19
B
Off/Reset
Estate
Inverno
LA
CO
Inverno con
preriscaldo
B
C
F
G
SERIAL NUMBER PLATE
gas
gas type
category
Qn =
Pn =
ç
=
D: 16,5 l/min
NOx: 5