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4 Electrical connections
Upon installing the electrical cables,
you are required to observe the regula
-
tions concerning electrical power in
-
stallations according to DIN VDE 0100
as well as the regulations of your local
power supplier.
Use a suitable power supply to ensure
that no dangerous voltages from the
system or parts of the system reach the
device in standard operation or in case
of a fault.
Warning!
Only connect the device to the main
power network when the power is
switched off. Make sure the power
cannot be switched on unintentionally!
4
Perform the electrical wiring as required
depending on the application (refer to
section 4.1 to 4.3).
As soon as the actuator is connected to the
power supply, the initialization procedure
starts:
The actuator stem extends and the red and
yellow LEDs located under the cover on top
of the actuator light up. As soon as the actu
-
ator stem has reached the final position, the
red LED is turned off. The yellow LED re
-
mains illuminated and indicates that the
controller with electric actuator is ready for
operation.
4.1 Type 5757-7 Controller with
Electric Actuator
Heating application: The controller with
electric actuator requires a Pt 1000 temper
-
ature sensor to be connected to measure the
flow temperature. Depending on the control
task, an outdoor sensor or a room sensor or
a room panel can be connected. Combining
one of these sensors with a return flow sen
-
sor is usually possible. Additionally, the con
-
troller with electric actuator has a potenti
-
ometer input 1000 to 1100/2000
Ω
. The
non-floating pump output can alternatively
be used as an binary output for an external
request for heat demand.
The default setting (WE) is configured for an
application with a flow sensor, outdoor sen-
sor and return flow sensor as well as with
an active binary input to switchover the op-
erating modes (see Fig. 2).
4.2 Type 5757 Controller with
Electric Actuator
Domestic hot water heating in instanta
-
neous heating system: The controller with
electric actuator requires a Pt 1000 temper
-
ature sensor to be connected for it to func
-
tion. Two set points W1 and W2 can be
used for control. A binary input BE1 is used
to switch between them.
In addition, a water flowmeter or a flow
switch can be connected to quickly recog
-
nize when hot water is being tapped.
The 0(4) to 20 mA current input can be used
in place of the Pt 1000 sensor for control
purposes.
EB 5766 EN 11
Electrical connections