INsTAllATION
INsTAllATION
30
|ETW 120, 180, 240, 300, 360, 420, 480 electronic
www.stiebel-eltron.com
9. Installation
9.1 Installation conditions and preparation
Observe the following explanations prior to installation.
9.1.1
Reducing the connected load
The connected load can be reduced by three output stages by
moving or removing jumpers at the terminals, in conjunction
with a charge level reduction at the charge controller (see chapter
"Specification", section "Reducing the connected load"). Size the
cross-sections and fuse according to the maximum possible output
of the appliance.
Danger of electrocution!
According to the technical connection conditions of
power supply utilities, a single phase connection may
only be made up to 2 kW (ETW 180).
9.1.2
Reducing the charge level
Jumper X17 is located on the electronic charge controller, and
is used to select the charge level of the heat storage part in four
stages (positions I, II, III or IV), in conjunction with the adjustable
connected load. At the factory, a charge level of 100% (position I)
is preselected. If the jumper is plugged into the other row of pins,
a reduced charge level results (reduced switch-off temperature of
the electronic charge controller).
I
80 % PS
II
80 % NS
III
68/72 %
IV
37/40 %
X15
X14
X13
X12
X1
1
X10
% PS
Electronic charge controller
V4
X17
X16
A1
26
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7�
27
�0
32
9
A1 Electronic charge controller
X16 Jumper for control signal matching has four stages.
X17 Jumper for output reduction has four stages.
V4 Operating and fault display.
9.1.3 Fault characteristics of the electronic charge controller
The charge controller is factory-set to "positive fault characteristics
(80% PS)", i.e. if the charge control system is faulty (e.g. control
signal failure), the appliance is fully charged.
You can change to "negative fault characteristics" (storage heater
is not charged) by replugging jumper X16 to position "80% NS",
if the appliance is connected to a digital charge control system.
9.1.4
Operation with charge control system
Observe the relevant information in the charge control system
instructions.
9.1.5
Control signal
The electronic charge controller can be connected to different
control unit control signals (ED), and can thus also be integrated
in existing systems. It is set at the factory to an AC control signal
(alternating current signal at terminals "A1+A2") with 80% ED.
Other ED signals (68/72, 37/40%) can be selected by replugging
jumper X16. This is necessary if the appliance is to be integrated
in an existing system which regulates charging with one of the
ED signals listed.
DC control signal connection (X3)
If a charge control system with a DC control signal (DC voltage
0.91 V – 1.43 V) is installed, the control signal must be connected
to the control terminals covered at the factory "DC + (positive) and
DC – (negative)" (observe polarity).
Danger of electrocution!
Never connect the 230 V AC control signal to the
terminals "DC + and DC -". This would completely
destroy the charge controller.
9.1.6 Output matching according to rated charge duration
(see chapter "Specification – output matching")
If jumpers at the terminals are moved or removed, the connected
load can be matched to the rated charge duration specified by the
power supply utility.
