4
B004
23 MFFI 27 MFFI 27 RFFI SYSTEM 30 MFFI
CE Certification
Heat Input max/min kW 25.6/11.0 29.8/12.0 29.8/12.0 33.0/12.0
Heat Output max/min kW 23.1/9.2 27.3/10.1 27.3/10.1 30.3/10.2
Efficiency of Nominal Heat Input % 90.2 91.6 91.6 92.0
Efficiency at 30% of Nominal Heat Input % 87.8 88.3 88.3 88.6
Heat Loss to the Casing (³T=50°C) % 1.2 1.3 1.3 1.4
Flue Heat Loss with Burner Operating % 8.6 7.1 7.1 6.6
Flue Heat Loss with Burner Off % 0.4 0.4 0.4 0.4
Maximum Discharge of Fumes (G20-G25) Kg/h 59 62 62 61
Residual Discharge Head mbar 1.15 1.4 1.4 1.4
Consumption at Nominal Capacity (G20-G25) m
3
/h 2.72/3.32 3.16/3.86 3.16/3.86 3.49/4.05
Gas Consumption after 10 Minutes* m
3
0.32/0.39 0.37/0.45 0.37/0.45 0.41/0.47
(15°C, 1013 mbar) (G30-G31) Kg/h 2.02/2.00 2.35/2.32 2.35/2.32 2.60/2.57
Temp. of exhaust fumes at nominal
capacity (G20-G25) °C 137 128 128 135
CO
2
Content % 5.8 6.6 6.6 7.5
O
2
Content % 9.2 8.0 8.0 8.0
CO Content ppm 32 34 34 49
Minimum Ambient Temperature °C +5 +5 +5 +5
Head Loss on Water Side (max) (³T=20°C) mbar 200 200 200 200
Residual Head of System bar 0.25 0.25 0.25 0.25
Heating Temperature max/min °C 82/42 82/42 82/42 82/42
Domestic Hot Water Temperature max/min °C 56/36 56/36 --- 56/36
D.H.W. Flow Rate ³T=35°C l/min 9.5 11.2 --- 12.3
D.H.W. Flow Rate ³T=35°C gal/min 2.1 2.5 --- 2.7
D.H.W. Flow Minimum Rate l/min 2.6 2.6 --- 2.6
Pressure of Domestic Hot Water max/min bar 6/0.2 6/0.2 --- 6/.02
Expansion Vessel Capacity l 7 7 7 7
Expansion Vessel Pre-load Pressure bar 1 1 1 1
Maximum Water Content in System l 145 145 145 145
Maximum Heating Pressure bar 3 3 3 3
Nominal Pressure Natural Gas (G20-G25) mbar 20-25 20-25 20-25 20-25
Liquid Gas (G30-G31) mbar 30-37 30-37 30-37 30-37
Electrical Supply V/Hz 230 / 50 230 / 50 230 / 50 230 / 560
Power Consumption W 150 190 190 190
Protection Grade of Electrical System IP X4D X4D X4D X4D
Internal Fuse Rating FAST 2 AT FAST 2 AT FAST 2 AT FAST 2 AT
Weight Kg 47 47 46.5 47
G.C. Number 47-116-08 47-116-09 41-116-01 47-116-13
1.2 Technical Information
3 - Check the general condition of the appliance and of the combustion
chamber visually.
4 - Visual check of the combustion: clean burners if necessary.
5 - With reference to point 3, dismantle and clean the combustion chamber if
necessary.
6 - With reference to point 4, dismantle and clean the injectors if necessary.
7 - Visual check of the primary heat exchanger:
- check for overheating of the exchangers fins;
- clean the exhaust side of the exchanger and fan if necessary.
8 - Regulate the gas pressure, ignition pressure, partial flame, maximum flame.
9 - Check proper operation of the heating safety system:
- maximum safety temperature;
- maximum safety pressure.
10 - Check the proper operation of the gas safety system:
- gas or flame safety device;
- gas valve safety device.
11 - Check that the electrical connections have been made in compliance with
the instructions shown in the Installation Instructions.
12 - Check the efficiency of the hot water supply (flow and temperature).
13 - Check general operation of the appliance.
14 - Check the exhaust system for the combustion products.
*Calculated at 70% maximum output
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