35
KR - KRB 24
Fuel type
CH
max.
heat input
[kW]
CH
heat output
(80-60°C)
[kW]
CH
heat output
(50-30°C)
[kW]
Gas mains
pressure [mbar]
nozzle
[mm/100]
diaphragm
diameter
[mm]
Flue gas
Co
2
value
[%]
min.
max.
min.
max.
Natural gas G20
23.7
2.7
22.9
3.22
24.9
20
3.7
-
9 ÷ 9.3
Propane Gas G31
23.7
2.7
22.9
3.22
24.9
37
3
-
10
Table 9 – KR/KRB 24 model adjustment rates
2.5.
General characteristics
KC - KR - KRB MoDeL
KC-KR-KRB 12 KC-KR-KRB 24 KC-KR-KRB 28 KC-KR-KRB 32
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
3
3
3
DHW circuit min. pressure (KC only)
bar
0.5
0.5
0.5
0.5
DHW circuit min. pressure (KC only)
bar
6
6
6
6
DHW specific flow rate (Δt 30K) (KC only)
l/min
8.8
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
121
121
121
121
Electric protection rating
IP
X5D
X5D
X5D
X5D
Net weight (KC model)
kg
-
36.9
38.4
39.4
Net weight (KR model)
kg
-
34.4
35.4
36.4
Net weight (KRB model)
kg
34.4
34.9
35.9
36.4
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
Maximum CH working temperature
°C
83
83
83
83
Maximum DHW working temperature (KC)
°C
62
62
62
62
Maximum DHW working temperature (KR - KRB + external 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 12 - General specifications, KC/KR/KRB model
(*) Value referred to 15°C - 1013 mbar
(**) Maximum water temperature 83°C, expansion vessel pressure 1 bar
ATTeNTIoN: the technical data listed above refer to gas category II2H3P with supply pressure 20 mbar for G20 and 37 mbar for G31. In
case of different gas categories, please contact the manufacturer.
KR - KRB 28
Fuel type
CH
max.
heat input
[kW]
CH
heat output
(80-60°C)
[kW]
CH
heat output
(50-30°C)
[kW]
Gas mains
pressure [mbar]
nozzle [mm/100]
diaphragm diameter
[mm]
Flue gas
Co
2
value
[%]
min.
max.
min.
max.
Natural gas G20
26.4
3
25.4
3.58
27.9
20
4
-
9 ÷ 9.3
Propane Gas G31
26.4
3
25.4
3.58
27.9
37
3.3
-
10 ÷ 10.3
Table 10 – KR/KRB 28 model adjustment rates
KR - KRB 32
Fuel type
CH
max.
heat input
[kW]
CH
heat output
(80-60°C)
[kW]
CH
heat output
(50-30°C)
[kW]
Gas mains
pressure [mbar]
nozzle [mm/100]
diaphragm diameter
[mm]
Flue gas
Co
2
value
[%]
min.
max.
min.
max.
Natural gas G20
30.4
3.9
29.4
4.4
32.3
20
4.45
-
9.0 ÷ 9.3
Propane Gas G31
30.4
3.9
29.4
4.4
32.3
37
3.55
7.2
10
Table 11 – KR/KRB 32 model adjustment rates
