9
en
Solar heated
Only for appliances that are suitable for solar heating
systems:
The appliance can only heat prewarmed water to a max.
of 60 °C. If the cold water supply exceeds a temperature 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.
VIII.
Dimensions
Special accessories
■ Pipe kit BZ 45U20 for use of the appliance 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
■ Only for appliances that are suitable for solar heating
systems:
Thermostatic premixer BZ 45T20: for installation in the
domestic plumbing when using preheated water
Environmentally-friendly disposal
This appliance is labelled in accordance with Euro-
pean Directive 2012/19/EU concerning used elec-
trical and electronic appliances (waste electrical
and electronic equipment – WEEE).
The guideline determines the framework for the
return and recycling of used appliances as appli-
cable throughout the EU.
Please ask your specialist retailer about current
disposal facilities.
Subject to change without notice.
–
–
–
–
DE1518527M
–
–
–
–
DE1821417
DE4161821M
DE5261821M
DE2124527M
–
–
–
DE2427527M
–
DE4162427M
DE5262427M
Rated output
[kW] 15/18 18/21 21/24 24/27
Rated voltage
[V] 400 400 400 400
Fuse protection [A] 25/32 32 32/40 40
Minimum conductor cross-section *
[mm
2
] 2.5/4 4 4/6 6
Warm water flow at rated output
with temperature increase from
12 °C to 38 °C (without flow-rate limiter)
12 °C to 38 °C (with flow-rate limiter)
12 °C to 60 °C
[l/min]
[l/min]
[l/min]
8.1/9.8
6.5
4.4/5.3
9.8/11.6
7.6
5.3/6.2
11.6/13.0
8.7
6.2/7.1
13.0/14.6
9.3
7.1/7.9
Start-up flow
[l/min] 2.5 2.5 2.5 2.5
Start-up flow pressure **
[MPa (bar)]
0.009
(0.09)
0.009
(0.09)
0.009
(0.09)
0.009
(0.09)
Application area in water
specific electric resistance at 15 °C
[Ωcm] ≥ 1 300 ≥ 1 300 ≥ 1 300 ≥ 1 300
Rated pressure
[MPa (bar)] 1.0 (10) 1.0 (10) 1.0 (10) 1.0 (10)
Maximum permissible supply temperature
[°C] 60 60 60 60
Maximum mains impedance at connection point
[Ω]
0.067/0.104 0.067/0.104 0.067/0.104 0.067/0.104
Energy efficiency class
AAAA
Load profile
SSSS
Annual energy consumption
[kWh] 478 479 479 479
Daily energy consumption
[kWh] 2.199 2.203 2.204 2.207
Sound power level
[dB] 15 15 15 15
Hot water heating energy efficiency
[%] 38.6 38.5 38.5 38.5
* Larger cable cross-sections may be required depending on the connection configuration.
** The pressure loss on the mixer must also be added.
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