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Specifications
Rated power [kW]
Rated voltage
Economy setting e [kW]
1st stage
2nd stage
Intensive setting II [kW]
1st stage
2nd stage
Switch-on point [I/min]
1st stage
2nd stage
Mixed water [I/min] at rated power
approx. 38 °C
approx. 50 °C
(supply temperature 12 °C)
Minimum flow pressure of appliance*
[MPa (bar)]
with flow limiter
without flow limiter
Application area in water specific
electric resistance at 15 °C [Ωcm]
Rated pressure [MPa (bar)]
Maximum permissible
supply temperature [°C]
Energy efficiency class
Load profile
Annual energy consumption [kWh]
Daily energy consumption [kWh]
Sound power level [dB]
Hot water heating energy efficiency [%]
* Plus any pressure loss at the tap mixer
Dimensions
C
Special accessories
BZ45U21 Pipe set: for use of the continuous-flow heater
as an under sink appliance
Priority switch (load shedding relay) BZ45L21:
for operation with the priority circuit
Mounting set BZ45K23: for surface-mount installation
10
en
DH12400M DH18400M DH21400M DH24400M DH40018M DH40021M DH40024M
13.2
18
21
400 V 3~
400 V 3~
400 V 3~
–
–
–
8
12
14
–
–
–
12
18
21
–
–
–
3.6
5.0
5.8
6.6
9.9
11.6
4.5
6.8
7.9
0.03 (0.3) 0.07 (0.7) 0.08 (0.8) 0.09 (0.9) 0.07 (0.7) 0.08 (0.8) 0.09 (0.9)
0.02 (0.2) 0.04 (0.4) 0.05 (0.5) 0.06 (0.6) 0.04 (0.4) 0.05 (0.5) 0.06 (0.6)
≥ 800
≥ 1 300
≥ 1 300
1 (10)
1 (10)
1 (10)
20
20
20
A
A
A
S
S
S
480
481
483
2.213
2.215
2.228
15
15
15
38.4
38.4
38.2
24
18
21
400 V 3~
400 V 3~
400 V 3~
–
6
7
16
12
14
–
9
10.5
24
18
21
–
4.0
4.5
6.6
5.0
5.8
13.2
9.9
11.6
9.1
6.8
7.9
≥ 1 300
≥ 1 300
≥ 1 300
1 (10)
1 (10)
1 (10)
20
20
20
A
A
A
S
S
S
483
481
483
2.232
2.215
2.228
15
15
15
38.1
38.4
38.2
24
400 V 3~
8
16
12
24
5.0
6.6
13.2
9.1
≥ 1 300
1 (10)
20
A
S
483
2.232
15
38.1
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