Adjusting The Charge Controller; Power Supply / Connecting Cables - STIEBEL ELTRON ETW 120 Plus Operation And Installation

INsTALLATIoN
Installation
f Undo the screws in the front panel. f
f Pull the front panel forwards and lift it upwards to remove it. f
f Undo the screws on the inner front panel at the bottom edge. f
f Pull the inner front panel forwards and lift it upwards to re- f
move it.
1 R.h. side panel (with loosened screws)
f Undo the 3 screws at the front and back of the right side f
panel.
f Pull the side panel forwards slightly and tilt it to the side at f
the top.
f Lift the side panel slightly and remove it. f

12.2 Adjusting the charge controller

Note
Observe the following information. After installation,
these settings can be made, in some cases to a limited
extent, subject to the installation location and version.
40 | ETW 120-480 Plus
1
12.2.1 Reducing the connected load
WARNING Electrocution
According to the technical connection conditions of
power supply utilities, a single phase connection may
only be made up to 2 kW (ETW 120-180 Plus).
The appliance connection is fully wired at the factory to the max-
imum output (100 %).
You can reduce the connected load by 3 output stages by moving
or removing jumpers at the terminals (see chapter "Specification /
Reducing the connected load").
Size the cross-sections and fuse according to the maximum pos-
sible output of the appliance.
Note
Observe the requirements of the local power supply util-
ity.
Any subsequent increase in connected load must be ap-
proved by the relevant power supply utility [Germany]. If
such a subsequent increase in load is not notified to the
power supply utility, this would represent a breach of the
power supply contract.
12.2.2 Output matching according to an increased nominal
charge duration
If jumpers at the terminals are moved or removed, the connected
load can be matched to the nominal charge duration specified by
the power supply utility. The storage heater is sized at the factory
to a nominal charge duration of 8 hours.
f Observe the details specified in chapter "Specification / Out- f
put matching".
12.2.3 Connection to DC control signal
If a charge control system with a DC control signal (DC voltage
0.91 V - 1.43 V) is installed on the system, you will need the DC
Control Input assembly (accessory). The DC control signal must be
connected to terminals A1/Z1 "DC + (positive)" and A2/Z2 "DC –
(negative)" on terminal strip X3. Observe the polarity.
12.3 Power supply / connecting cables
WARNING Electrocution
f Before any work on the appliance, isolate the con- f
necting cables in the control panel.
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