Electrical Connection - Samson 5757-7 Mounting And Operating Instructions

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Electrical connection

Risk of electric shock!
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 normal op-
eration or in case of a fault in the
system or any other system parts.
Connect the actuator to the electrical
network only after the power supply
is first switched off. Make sure the
power cannot be switched on unin-
tentionally!
The pump output L' is non-floating
(230 V~).
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 6.2). On
using an outdoor sensor, it can change the
adjusted heating characteristic (see sec-
tion 6.1).
The non-floating switching output can alter-
natively be used as an output for an external
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 (underneath the cover
on top of the circuit board). Each sensor has
its own blinking pattern (see section 2.3).
In the event that several sensors are
defective, the LED blinks using the sequence
for the sensor with the highest priority:
Highest priority
Lowest priority
Example: In the event that the flow sensor
and outdoor sensor are defective, the LED
initially blinks to indicate that the flow sen-
sor is defective. When this fault is elimina-
ted, the LED then blinks to indicate that the
outdoor sensor is defective.
Electrical connection
Flow sensor
Outdoor sensor or
room sensor
Return flow sensor
Potentiometer
EB 5757-7 EN
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