4
Id.Nr.: 228843-13
Electric water heater EKA, EKR, EWH, EKL
1. Function
The water stored in the enamelled interior tank is heated by an electrical heater insert. A
user-adjustable knob is available to preset the desired temperature. At the times determi-
ned by the responsible power supply company, the temperature controller automatically
switches on the heating. Once the desired temperature in the storage tank is reached,
the temperature controller switches the heater off again. If the water temperature drops,
for instance because water is used up or as a result of natural cooling (an effect that is
minimised by the high-quality CFC-free PU foam insulation), the heating will switch on
until the preset storage water temperature is reached again.
If the storage tank is equipped with a heater battery (EKR), the water may be heated with
the system’s water heater as an alternative to electrical heating.
2. Hot water requirement
The hot water requirement of the household depends on the number of persons in the
household, the sanitary installations of the flat or house, the insulation, the piping and
the individual user’s habits.
The following table provides a list of standard consumption values for orientation.
In this table, it was assumed that the temperature of the cold water required for mixing
to the indicated hot water temperature is approximately 12°C.
Hot water demand in
litres
Required storage water
quantity in litres
at 37 °C
at 55 °C
with 80 °C with 60 °C
Full bath
150 - 180
55 - 66
78 - 94
Shower
30 - 50
11 - 18
16 - 26
Washing hands
3 - 6
1 - 2
1,6 - 3,1
Hair wash (short hair)
6 - 12
3 - 4,4
4,2 - 6,3
Hair wash (long hair)
10 - 18
3,7 - 6,6
5,2 - 9,4
Use of bidet
12 - 15
4,4 - 5,5
6,3 - 7,8
Washing dishes
for 2 persons per day
16
10
14
for 3 persons per day
20
12,5
18
for 4 persons per day
24
15,2
21,5
House cleaning per bucket
of cleaning water
10
6,3
9
