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Ariston Microgenus II 31 MFFI Boiler
Compact wall-hung gas combination boiler, room sealed combustion chamber
24,6 kW / 83900 Btu/h, Fan flued, Natural Gas
microGENUS II combines the most advanced heating and domestic hot water production technologies in one compact unit, with tiny dimentions of just 700 x 400 x 300 mm, it can be installed almost anywhere.
Reliable, quiet, durable and hard working, this boiler looks great and offers three different outputs to suit most needs.
Guarantee:
2 Year Guarantee (extended up to 5 years).
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Main Technical Information |
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Usable thermal power max |
kW |
31 |
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Heigth |
mm |
700 |
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Width |
mm |
400 |
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Depth |
mm |
300 |
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Characteristics |
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Compact dimentions (300x400x700mm)
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Available in 3 outputs of 24.6 kW, 28.1 kW and 31.0 kW
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Fully modulating in C.H./D.H.W. with an accuracy to
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Auto-diagnostic system and integrated control in P.C.B
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Government standard assessment procedure (SAP) efficiency rating up to 80.3%
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Comfort Switch (pre heat function) guaranteeing hot water at the outlet in less than 5 seconds
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High D.H.W flow rates up to 12.7 l/min (2.8 gal/min) (31 kW - 105800 Btu/h version)
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Anti-frot device
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Anti-scale device
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Anti-seizing device for the pump
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Built-in mechanical time clock
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Coaxial flue system up to 4m, twin pipe system up to 30m
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split exhust and intake pipes for built-in combustion analysis
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Optional outdoor sensor: regulates the heating temperature automatically
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D.H.W Stainless steel plate heat exchanger guaranteed for 5 years
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| Technical Data |
| Power |
| Heating capacity max |
kW |
33,5 |
| Heating capacity max |
Btu/h |
114300 |
| Heating capacity min |
kW |
14 |
| Heating capacity min |
Btu/h |
47700 |
| Usable thermal power max |
kW |
31 |
| Usable thermal power max |
Btu/h |
105800 |
| Usable thermal power min |
kW |
12,6 |
| Usable thermal power min |
Btu/h |
43000 |
| Characteristics |
| Heat loss to the casing (DT=50°C) |
% |
1,1 |
| Heat loss through the flue when burner on |
% |
6,5 |
| Heat loss through the flue when burner off |
% |
0,4 |
| Maximum exhaust discharge (natural gas) |
kg/h |
74.3 |
| Exhaust gas temperature at nominal capacity |
°C |
0132,1 |
| Minimum ambient temperature |
°C |
5 |
| Gas inlet pressure - Natural Gas (G20) |
mbar |
20 |
| Gas inlet pressure - LPG (G30) |
mbar |
28 |
| Gas inlet pressure - LPG (G31) |
mbar |
30 |
| Residual discharge head |
mbar |
1,6 |
| Pressure loss through boiler (max) (DT=20°C) |
mbar |
200 |
| Maximum heating pressure |
bar |
3 |
| Maximum water content of system |
l |
130 |
| Built-in expansion vessel pre-charge pressure |
bar |
1 |
| Maximum domestic hot water pressure |
bar |
6 |
| Minimum domestic hot water pressure |
bar |
0,2 |
| D.H.W minimum flow rate |
l/min |
2,5 |
| Built-in expansion vessel capacity |
l |
6 |
| Gas consumption at nominal capacity G20 (15°C; 1013 mbar) |
m³/h |
3,54 |
| Gas consumption G30 (15°C; 1013 mbar) |
kg/h |
2,64 |
| Gas consumption G31 (15°C; 1013 mbar) |
kg/h |
2,6 |
| Heigth |
mm |
700 |
| Width |
mm |
400 |
| Depth |
mm |
300 |
| Performance |
| Maximum heating temperature |
°C |
82 |
| Minimum heating temperature |
°C |
38 |
| Maximum domestic hot water temperature |
°C |
56 |
| Minimum domestic hot water temperature |
°C |
36 |
| D.H.W flow rate (DT=35°C) |
gal/min |
2,8 |
| Electrical data |
| Supply voltage |
V |
230 |
| Power consumption |
W |
125 |
| Protection grade of electrical system |
IP |
X4D |
| Internal fuse rating |
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FAST 2 AT |
Technical Drawing
Legend:
A Central heating flow Ø 3/4" BSP
B Domestic hot water outlet Ø 1/2"" BSP
C Gas inlet Ø 3/4" BSP
D Domestic hot water inlet Ø 1/2" BSP
E Central heating return Ø 3/4" BSP
F Flue (Ø mm)
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Residual Head |
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(Image not available)
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Hydraulic Schematic |
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Legend:
ACentral heating flow Ø 3/4" BSP
B Domestic hot water outlet Ø 1/2"" BSP
C Gas inlet Ø 3/4" BSP
D Domestic hot water inlet Ø 1/2" BSP
E Central heating return Ø 3/4" BSP
F Flue (Ø mm) | |
