27
4. GAS ADJUSTMENTS
CA
TEGORY II2H3+
Methane Gas
G20
Liquid Butane Gas
G30
Liquid Pr
opane Gas
G31
Lower Wobbe Index (15°C;1013mbar) MJ/m
3
h
Nominal Delivery Pressure mbar
45.67
20
80.58
29
80.58
37
0.72
---
2.06 - 0.85
35.6 - 6.8
0.77
---
2.31 - 0.93
36.0 - 6.0
0.80
---
2.60 - 1.09
34 - 6.5
0.72
---
2.09 - 0.87
28.1 - 5.0
0.77
---
2.35 - 0.95
28.0 - 5.0
0.80
---
2.64 - 1.10
26.8 - 5.3
1.25
2.80 - 1.16
---
10.3 - 2.0
1.30
3.15 - 1.27
---
10.8 - 2.0
1.35
3.54 - 1.48
---
11.5 - 2.1
microGenus II 24 MFFI
Main Burner: n. 14 jets (ø) mm
Consumption (15°C; 1013mbar) max - min m
3
/h
Consumption (15°C; 1013mbar) max - min Kg/h
Gas Burner Pressure
max - min mbar
micr
oGenus II 28 MFFI
Main Burner: n. 14 jets (ø) mm
Consumption (15
°C; 1013mbar) max - min m
3
/h
Consumption (15°C; 1013mbar) max - min Kg/h
Gas Burner Pressure
max - min mbar
microGenus II 31 MFFI
Main Burner: n. 14 jets (ø) mm
Consumption (15°C; 1013mbar) max - min m
3
/h
Consumption (15°C; 1013mbar) max - min Kg/h
Gas Burner Pressure
max - min mbar
The boiler can be converted to use either methane
(natural) gas (G20) or L.P.G. (G30 - G31) by an
Authorised Service Centre.
The operations that must be performed are the following:
1. Replace the jets on the main burner
(see table in section 4);
2. Adjust the maximum and minimum thermal capacity
values for the boiler
(see table in section 4 and 4.2 Adjusting the Gas
Pressures);
3. Adjust the maximum thermal power setting
(see tables in section 4.3 and FIG. 4.1);
4. Adjust the soft-light feature
(see table below for recommended pressure and
Fig. 4.1);
5. Adjust the ignition delay feature for the heating system
by adjusting the Jumper as indicated in Section 2.14
(FIG. 2.23). It can be set from 0 to 2 mins.).
4.1 CHANGING THE TYPE OF GAS
CATEGORY
II2H3+
Methane
Gas
G20
Liquid
Butane
Gas
G30
Liquid
Propane
Gas
G31
Recommended
Soft-light
Pressure (mbar)
24 kW
28 kW
31 kW
5.0
5.0
4.5
12.0
12.0
12.0
12.0
12.0
12.0
TABLE A
RECOMMENDED SOFT LIGHT PRESSURES
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