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Ariston Microcombi 27 MFFI Boiler
Compact wall-hung electronic ignition gas combination boiler
Fan flued, Natural Gas
The microCombi boiler is compact and reliable. Hot water is always available independently to the central heating. Water is heated instantaneously when required thereby dramatically reducing gas consumption.
Guarantee:
1 year (extendible up to 5 years).
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Main Technical Information |
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Heigth |
mm |
700 |
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Width |
mm |
400 |
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Depth |
mm |
315 |
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Characteristics |
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23.7/80,900 & 27.0 kW/92,100 Btu/h Outputs
Built-in mechanical time
Fully modulating
Fast "twin pass" heat exchanger
Built-in by-pass
Anti-frost device
Anti-scale protection
Connection kit
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Internal View |
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Legend:
1 - Flue connector
2 - Air intake
3 - Fan
4 - Combustion chamber hood
5 - "Twin-pass" heat exchanger
6 - Domestic hot water temperature probe
7 - Combustion chamber
8 - Burner
9 - Detection electrode
10 - Ignition electrodes
11 - Diverter valve
12 - Control panel
13 - Gas valve
14 - Spark generator
15 - Water entry filter
16 - Circulation pump with automatic air release valve
17 - 3 bar safety valve
18 - Expansion vessel
19 - Central heating temperature probe
20 - Venturi
21 - Air pressure switch
22 - Combustion analysis points | |
| Technical Data |
| Power |
| Heat input min (net) |
kW |
11 |
| Heat input min (net) |
Btu/h |
37500 |
| Heat input max (net) |
kW |
27,3 |
| Heat input max (net) |
Btu/h |
93100 |
| Heat output min |
kW |
9,3 |
| Heat output min |
Btu/h |
31700 |
| Heat output max |
kW |
27 |
| Heat output max |
Btu/h |
92100 |
| Efficiency |
| SEDBUK Rating |
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D |
| Characteristics |
| Exhaust gas temperature at nominal capacity |
°C |
149 |
| Gas inlet pressure - Natural Gas (G20) |
mbar |
20 |
| Pressure loss through boiler (max) (DT=20°C) |
mbar |
200 |
| Residual head of system |
bar |
0,25 |
| 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 after 10 minutes |
m³ |
0,36 |
| GC number |
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47-116-24 |
| Heigth |
mm |
700 |
| Width |
mm |
400 |
| Depth |
mm |
315 |
| Weight |
kg |
41 |
| Performance |
| Maximum heating temperature |
°C |
82 |
| Minimum heating temperature |
°C |
42 |
| Maximum domestic hot water temperature |
°C |
56 |
| Minimum domestic hot water temperature |
°C |
36 |
| D.H.W flow rate (DT=35°C) |
gal/min |
2,5 |
| D.H.W flow rate (DT=35°C) |
l/min |
11 |
| Electrical data |
| Supply voltage |
V |
230 |
| Supply frequency |
Hz |
50 |
| Power consumption |
W |
155 |
| Protection grade of electrical system |
IP |
X4D |
| Internal fuse rating |
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FAST 2 AT |
Dimensions
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
G Flue (Ø mm) G1 60/100 - G2 80
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Residual Head |
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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
G Flue (Ø mm) G1 60/100 - G2 80
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