3 Technical specifications
Combi 2
15
Tab.7 Characteristics of the heating circuit
424
430
Maximum pressure
bar
2.5
2.5
Minimum pressure
bar
0.5
0.5
Temperature range for heating circuit
°C
25 - 80
25 - 80
Water capacity of expansion vessel
l
7
7
Tab.8 Characteristics of the domestic water circuit
424
430
Minimum pressure
bar
0.8
0.8
Maximum pressure
bar
8.0
8.0
Minimum dynamic pressure
bar
0.15
0.15
Minimum water flow
l/min
2.0
2.0
Specific flow (D)
l/min
11.5
14
Temperature range for domestic water circuit
°C
35 - 60
35 - 60
Domestic water production with
ΔT
= 25 °C
l/min
13.8
16.7
Domestic water production with
ΔT
= 35 °C
l/min
9.8
11.9
Tab.9 Combustion characteristics
Dynamic (nominal) inlet pressure (Natural gas — G20) 20mbar with a CV of 37.78 MJ/m
3
424
430
G20 gas consumption (Qmax)
m
3
/h
2.61
3.17
G20 gas consumption (Qmax) with domestic hot water tank
m
3
/h
–
-
G20 gas consumption (Qmin)
m
3
/h
0.52
0.63
G31 propane gas consumption (Qmax)
kg/h
1.92
2.33
G31 propane gas consumption (Qmin)
kg/h
0.38
0.47
Diameter of separate discharge pipes
mm
80/80
80/80
Diameter of coaxial discharge pipes
mm
60/100
60/100
Flue gas mass flow rate (max)
kg/sec
0.011
0.014
Flue gas mass flow rate (max) with domestic hot water tank
kg/sec
–
-
Flue gas mass flow rate (min)
kg/sec
0.002
0.003
Tab.10 Electrical characteristics
424
430
Power supply voltage
V
230
230
Power supply frequency
Hz
50
50
Rated electric power
W
90
90
Rated electrical output with domestic hot water tank
W
–
-
Tab.11 Other characteristics
424
430
Humidity protection rating (EN 60529)
IP
X5D
X5D
Net weight when empty/filled with water
kg
28/30
29/31
Dimensions (height/width/depth)
mm
700/395/285
700/395/285
