PC-250 Filter control unit operating manual Page: 12 (24
Dosing system connection
PC-250
20 21
Dosiertechnik
(potentialfrei)
max. 230V / 8A
There is a floating relay contact between terminals 20
and 21. This can, for example, be used for activation of
the dosing system (the contact remains closed during
filter operation).
This contact can be loaded with a maximum of 230 V/8A.
Temperature sensor connection
Schwimmbad
Temperaturfühler
30 31
Fühler
Solar-
32 33
Filtersteuerung PC-250
-Tauchhülse
The swimming pool temperature sensor is connected to terminals 30 and 31. The
temperature sensor is supplied with a cable length of 1.5 m as standard. If required, this
can be lengthened to maximum 20 m (cross-section minimum 0.5 mm²) with a 2-core
cable. You should avoid routing the sensor cable near power cables to prevent possible
interference.
Since precise temperature control can only be achieved with good heat transfer between
temperature sensor and swimming pool water, an
immersed sleeve R ½" (Art. No.
3200200003) should be built into the piping system. The sensor polarity is as required.
A solar temperature sensor (Art. No. 3100000030) can be additionally connected to
terminals 32 and 33. The temperature sensor is supplied with a cable length of 20 m as
standard. If required, this can be lengthened to maximum 50 m (cross-section minimum
0.5mm²) with a 2-core cable. You should avoid routing the sensor cable near power cables
to prevent possible interference. The solar temperature sensor should be connected at the
solar collector output and must have good heat contact to the returning water flow. The
temperature at the temperature sensor installation site may not exceed 80 °C.
Setting motor protection
Please see the Info key information in menu command 10.
Starting the backflushing process
If the backflushing key is pressed for 3 seconds without interruption, the backflushing
process will start. Backflushing will not start unless a backflushing duration has been
entered.
Submerged sleeve
