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
Summary of Contents for GENUS 27 MFFI
Page 17: ...17 B004 Aa GENUS 23 27 30 MFFI Aa GENUS 27 RFFI SYSTEM...
Page 18: ...18 B004 CN202 P GENUS 23 27 30 MFFI P GENUS 27 RFFI SYSTEM...
Page 29: ...B004 NOTES...
Page 30: ...30 B004 NOTES...
Page 31: ...31 B004...
