Pressure drop on the heating water side
0.4
0.5
0.6
0.8
1.0
2.0
3.0
4.0
5.0
6.0
8.0
10.0
20.0
30.0
40.0
50.0
500 600
800
1000
2000
3000
4000
5000 6000 7000
4
5
6
8
10
20
30
40
50
60
80
100
200
300
400
500
kPa
C
Pressure drop
in
Heating water flow rate in l/h
mbar
for one cylinder
A
B
A
Cylinder capacity 500 l
B
Cylinder capacity 300 l
C
Cylinder capacity 750 l and 950 l
Pressure drop on the DHW side
0.1
0.2
0.3
0.4
0.5
0.6
0.8
1.0
2.0
3.0
4.0
5.0
6.0
8.0
10.0
500 600
800
1000
2000
3000
4000
5000 6000
1
2
3
4
5
6
8
10
20
30
40
50
60
80
100
kPa
Pressure drop
in
DHW flow rate in l/h
mbar
for one cylinder
A
C
B
D
A
Cylinder capacity 300 l
B
Cylinder capacity 500 l
C
Cylinder capacity 750 l
D
Cylinder capacity 950 l
EHE Immersion heater
Part no. Z012676
■ For cylinder capacity of
300 l
■ For installation into the
lower
flanged aperture
■ Use the immersion heater only with soft to medium hard water with
a calcium hardness up to 14 °dH (hardness level 2, up to
2.5 mol/m
3
).
■ The heating output can be selected: 2, 4 or 6 kW
Components:
■ High limit safety cut-out
■ Temperature controller
Note
■ A contactor relay, part no. 7814681, is required for switching the
immersion heater via the heat pump.
■ The immersion heater is not intended for operation with 230 V~. If
no 400 V connection is available, use commercially available
immersion heaters.
Specification
Output
kW
2
4
6
Rated voltage
3/N/PE 400 V/50 Hz
IP rating
IP 44
Rated current
A
8.7
8.7
8.7
Heat-up time from 10 to 60 °C
7.4
3.7
2.5
Capacity that can be heated by
the immersion heater
l
254
Impressed current anode
Part no. 7265008
■ Maintenance free
■ Install in place of the magnesium anode supplied
Installation accessories
(cont.)
VITOCAL
VIESMANN
81
5831388
6
