3 Electrical connection
When installing electric lines, you
are required to observe the regula-
tions governing electrical power
plant installation according to
DIN VDE 0100 as well as the regu-
lations of your local power supply
company.
Use a suitable power supply which
guarantees that no dangerous volt-
ages reach the device in standard
operation or in case of a fault in the
system or any other system parts.
The controller with electric actuator requires
a Pt 1000 temperature sensor (e.g. Type
5267-2) to be connected to measure the
flow temperature.
Depending on the control task, an outdoor
sensor (e.g. Type 5227-2) or a room sensor
(e.g. Type 5257-2) or a room panel
(Type 5257-7 only) can be connected. Com-
bining one of these sensors with a return
flow sensor (e.g. Type 5267-2) is usually
possible.
Additionally, the controller with electric ac-
tuator has a potentiometer input 1000 to
1100 Ω(e.g. Type 5257-7) or 1000 to
2000 Ω(e.g. Type 5257-2). This input is
used to correct the room set point (±5 K) in
case of fixed set point control with room
temperature influence (see section 5.2). On
using an outdoor sensor, it can change the
adjusted heating characteristic (see sec-
tion 5.1).
The non-floating pump output can alterna-
tively be used as an binary output for an ex-
ternal request for heat demand.
The connected sensors are monitored for
line breakages.
A fault in the line of a sensor is indicated by
the red LED blinking slowly.
Caution!
Connect the actuator to the electrical
network only after the power supply
has first been switched off. Make
sure the power cannot be switched
on unintentionally!
The pump output L’ is non-floating
(230 V~).
4Perform the electrical connection de-
pending on the heating application ac-
cording to one of the following wiring di-
agrams (Figs. 4 and 5).
As soon as the actuator is connected to
the power supply, the initialization pro-
cedure starts.
The actuator stem extends (with operat-
ing direction selected for globe valves)
and the red and yellow LEDs are illumi-
nated located under the cover on top of
the actuator.
As soon as the actuator stem has
reached the final position, the red LED is
turned off. The yellow LED remains illu-
minated and indicates that the controller
with electric actuator is ready for opera-
tion.
8EB 5757-7 EN
Electrical connection
