38
Technical features and dimensions
2.7
General characteristics
Description
um
KRBS 12
KRBS 24
KRBS 28
KRBS 32
CH nominal heat input
kW
12.0
23.7
26.4
30.4
Minimum heat input
kW
2.0
3.0
3.3
4.2
Maximum heat output (80-60°C) - CH
kW
11.6
22.9
25.4
29.4
Minimum heat output (80-60°C) - CH
kW
1.8
2.7
3.0
3.9
Maximum heat output (50-30°C) - CH
kW
12.6
24.9
27.9
32.3
Minimum heat output (50-30°C) - CH
kW
2.1
3.22
3.58
4.4
Minimum CH system pressure
bar
0.5
0.5
0.5
0.5
Maximum CH system pressure
bar
3.0
3.0
3.0
3.0
DHW maximum heat input
kW
18.0
27.3
30.4
34.5
DHW minimum heat input
kW
2.0
3.0
3.3
4.2
DHW circuit min. pressure
bar
0.5
0.5
0.5
0.5
DHW circuit max. pressure
bar
6.0
6.0
6.0
6.0
DHW speciic low rate (ΔT=25K)
l/min
28.3
28.3
30.4
31.6
DHW speciic low rate (ΔT=30K)
l/min
23.6
23.6
25.3
26.3
Qualiication of domestic hot water - EN 13203-1
-
Draw capacity for 10 min. - EN 13203-1
l/min
17.6
22.0
22.4
22.4
Electric power supply – voltage / frequency
V - Hz
230 -50
230 -50
230 -50
230 -50
Power mains supply fuse
A
3.15
3.15
3.15
3.15
Maximum power consumption
KRBS
W
95
103
106
114
KRBS V
W
181
189
191
199
KRBS Z
W
230
238
240
199
Pump absorption
KRBS
W
46
46
46
46
KRBS V
W
125
125
125
125
KRBS Z
W
170
170
170
170
Electric protection rating
IP
X5D
X5D
X5D
X5D
Natural gas consumption at maximum CH output (Value referred to 15
°C - 1013 mbar)
cu. m/h
1.27
2.51
2.79
3.22
Propane gas consumption at maximum CH output
kg/h
0.93
1.84
2.05
2.36
Maximum CH working temperature
°C
83
83
83
83
Maximum DHW working temperature
°C
65
65
65
65
Heating expansion vessel total capacity
l
10
10
10
10
DHW expansion vessel total capacity
l
12
12
12
12
Solar total expansion vessel capacity (+ additional vessel)
l
18+5
18+5
18+5
18+5
Maximum recommended system capacity (Maximum water
temperature 83°C, expansion vessel pressure 1 bar)
l
200
200
200
200
Tab. 6 General specifications
For M versions (KRBS M, MV and MZ) add 1 W to power indication of the corresponding versions (KRBS, V and Z).
