27
2.5.
General characteristics
model
12 kW
24 kW
28 kW
32 kW
Device category
-
II2H3P
II2H3P
II2H3P
II2H3P
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 system min. pressure (KC)
bar
0.5
0.5
0.5
0.5
DHW system max. pressure (KC)
bar
6.0
6.0
6.0
6.0
DHW specific flow rate (Δt 30K) (KC)
l/min
8.6
13.4
15.5
16.3
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
W
131
151
151
151
Electric protection rating
IP
X5D
X5D
X5D
X5D
Net weight (KC)
kg
29.8
30.5
32
38
Net weight (KRB)
kg
28.8
29.5
31
37
Net weight (KR)
kg
28.3
29
30.5
36.5
Natural gas consumption at maximum CH output (*)
m
3
/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
Max CH working temperature
°C
83
83
83
83
Max DHW working temperature (mod. KC)
°C
62
62
62
62
Max DHW working temperature (mod. KR and KRB with optional water cylinder)
°C
65
65
65
65
Total capacity of expansion vessel
l
10
10
10
10
Maximum recommended system capacity (**)
l
200
200
200
200
Table 13 - General specifications, KC/KRB/KR model
(*) Value referred to 15°C - 1013 mbar
(**) Maximum water temperature 83°C, expansion vessel pressure 1 bar
KC 24/KRB 24/KR 24
Max. output
Min. output
30% load
Casing heat loss with burner on
%
0.97
6.49
-
Casing heat loss with burner off
%
0.28
Flue system heat loss with burner on
%
2.62
2.09
-
Flue system mass capacity
g/s
12.43
1.33
-
Flue gas temp. – air temp.
°C
61
33
-
Maximum heat output efficiency rating (60/80°C)
%
96.7
-
-
Maximum heat output efficiency rating (30/50°C)
%
105.1
-
-
Minimum heat output efficiency rating (60/80°C)
%
-
91.4
-
Minimum heat output efficiency rating (30/50°C)
%
-
104.9
-
30% heat output efficiency rating
%
-
-
106.5
Efficiency rating (according to 92/42/EC)
-
NO
x
emission class
-
5
Table 15 - Combustion specifications, KC 24/KRB 24/KR 24 model
KC 12/KRB 12/KR 12
Max. output
Min. output
30% load
Casing heat loss with burner on
%
0.26
7.78
-
Casing heat loss with burner off
%
0.55
Flue system heat loss with burner on
%
2.64
1.92
-
Flue system mass capacity
g/s
8.25
0.89
-
Flue gas temp. – air temp.
°C
57.9
34.5
-
Maximum heat output efficiency rating (60/80°C)
%
97.1
-
-
Maximum heat output efficiency rating (30/50°C)
%
105.1
-
-
Minimum heat output efficiency rating (60/80°C)
%
-
90.3
-
Minimum heat output efficiency rating (30/50°C)
%
-
105.0
-
30% heat output efficiency rating
%
-
-
106.0
Efficiency rating (according to 92/42/EC)
-
NO
x
emission class
-
5
Table 14 - Combustion specifications, KC 12/KRB 12/KR 12 model
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