4
3
Specifications
Tab.
№
. 1
Sizes, operation temperature and electrical variables
K 2 L3X
K 2 L5X
Fuel type
[-]
ZP
ZP
Appliance category
[-]
I
2H
I
2H
Weight
[kg]
69
95
Water content
[l]
9
13
Boiler dimensions - width (L2)
[mm]
502
587
- depth
[mm]
548
548
- height
[mm]
956
956
Ø connection of the combustion air
[mm]
80
80
Ø smoke socket
[mm]
80
110
Maximum working water overpressure
[kPa]/[bar]
250/2.5
250/2.5
Testing water overpressure
[kPa]/[bar]
600/6
600/6
Dissipation factor
[-]
11.37
6.85
Maximum allowable operating temperature
[°C]
85
85
Connecting fuel overpressure G20
[mbar]
20
20
Noise level
[dB]
< 55
< 55
Boiler connection
- heating water outlet
[Js]
3/4“
3/4“
- heating water outlet to the heater
[Js]
3/4“
3/4“
- return heating water inlet
[Js]
3/4“
3/4“
- return water inlet from the heater
[Js]
3/4“
3/4“
- condensate outlet
[mm]
Ø 25
Ø 25
- safety valve outlet
[Js]
3/4“
3/4“
- gas inlet
[Js]
3/4“
3/4“
Supply voltage
1/N/PE 230 VAC 50 Hz TN-S
Input power including pumps
[W]
110
110
El. protection
IP
41
41
Tab.
№
. 2
Heat-technical parameters
Comparative conditions 15 °C and 1013,25 mbar, dry gas
K 2 L3X
K 2 L5X
Performance
B
23
,
B
53
, C
83
B
23
,
B
53
, C
83
Boiler power range
[kW]
3.8 - 24
7.8 – 48.1
Rated heat output 80/60 °C
[kW]
22.4
45.3
Minimum heat output 80/60 °C
[kW]
3.8
7.8
Rated heat output 50/30 °C
[kW]
24.3
48.1
Minimum heat output 50/30 °C
[kW]
4.3
8.8
Rated heat input
[kW]
23.7
47.3
Minimum heat input
[kW]
4
8.1
Efficiency at rated heat output 80/60 °C
[%]
97.2
97.2
Efficiency at rated heat output 50/30 °C
[%]
103.1
102
Efficiency at minimum heat output 50/30 °C
[%]
108.2
107.7
Volumetric flow rate of fuel
[m
3
.h
-1
]
0.408 - 2.4
0.836 – 4.877
Flue gas mass flow
[kg.h
-1
]
5.2 - 39.2
12.26 - 80.85
NOx Class
[-]
5
5
Flue gas temperature
[°C]
30 - 85
40 - 85
Fig.
№
. 1
Dependence of the pressure loss on flow
3 sect.
5 sect.
