Technical Data; Special Accessories; Dimensions - Siemens DE1821555 Notice De Montage

Technical data

Rated output
Rated voltage
Fuse protection
Minimum conductor cross-section **
Warm water flow at rated output
with temperature increase from
12 °C to 38 °C
12 °C to 60 °C
Start-up flow
Start-up flow pressure *
Application area in water
specific electric resistance at 15 °C
Rated pressure
Maximum permissible supply temperature
Maximum mains impedance at connection point
Energy efficiency class
Load profile
Annual energy consumption
Daily energy consumption
Sound power level
Hot water heating energy efficiency
* Larger cable cross-sections may be required depending on the connection configuration.
** The pressure loss on the mixer must also be added.
Operation with prewarmed water (solar heated)
The continuous-flow heater can only heat prewarmed water
to a max. of 60 °C. If the cold water supply exceeds a tem-
perature of 55 °C, the water will not be warmed any further.
Important: The cold water supply temperature must not be
higher than 55 °C!
If the cold water supply exceeds a temperature of 60 °C, a
circuit breaker will trigger and shut the appliance off. There-
fore, the residential plumbing must be equipped with a ther-
mostatic premixer (e. g. special accessory BZ 45T20) that will
limit the cold water supply temperature to a max. of 55 °C by
appropriately mixing in cold water.

Dimensions

D
8
en
DE1821555
18
[kW]
21
[V] 400
[A] 32
[mm 2 ] 4
9.9
[l/min]
11.6
5.4
[l/min]
6.3
[l/min] 2.6
[MPa (bar)] 0.025 (0.25)
[Ωcm] ≥ 1 300
[MPa (bar)] 1.0 (10.0)
[°C] 55
[Ω] ≤ 0.244
A
S
[kWh] 484
[kWh] 2.235
[dB] 15
[%] 38.1

Special accessories

Pipe kit BZ 45U20: for use of the continuous-flow heater
as an under sink appliance
Priority switch (load shedding relay) BZ 45L21:
for operation with a priority circuit
Mounting kit BZ 45K23: for surface mount installation
Thermostatic premixer BZ 45T20: for installation in the
domestic plumbing when using preheated water
DE2427555
24
27
400
40
6
13.2
13.9
7.2
7.6
2.6
0.025 (0.25)
≥ 1 300
1.0 (10.0)
55
≤ 0.244
A
S
481
2.220
15
38.3