PC-250 Filter control unit operating manual Page: 11 (24
The floating relay contact between terminals 22 and 23 can be loaded with a voltage of
maximum 230 V and a current of maximum 8 A.
If the heater requires 230 V, it can be connected to terminal U2. Terminals are also
available for the heater N connection.
A 230 V
solar actuating drive can be connected to terminals U5 and U6 for operating
the solar heater. When operating solar heater, terminal U5 carries the mains voltage and
terminal U6 is voltage-free. If the solar heater is not being operated, terminal U5 remains
voltage-free and terminal U6 carries the mains voltage. These contacts may the loaded
with a maximum 230 V/1.5A.
Level regulation and backflushing control
Filtersteuerung PC-30
NR-12-TRS-2
steuerung
Auffangbehälter-
11 12 13 14
11 12 13 14
U3 N
R
ü
c
ks
p
ü
lv
e
n
ti
l
230V
m
a
x
.2
A
EUROTRONIK-10
2 3 4 5
2 3 4 5
Rückspülsteuerung
U4 N
K
la
rs
p
ü
lv
e
n
ti
l
230V
m
a
x
.2
A
A 230 V bar valve for backflushing can be connected to terminals U3 and N.
A 230 V bar valve for rinsing can be connected to terminals U4 and N.
Both valves will be controlled by the internal backflushing controller.
Heater and dosing systems are blocked during the backflushing and rinsing processes.
Either bar valves or a EUROTRONIK-10 can be used for backflushing or rinsing.
The bridge fitted in the works between terminals
13
and
14
must be removed if level
regulation system NR-12-TRS-2 is connected. The bridge can remain between these
terminals if no level regulation system is connected. Terminals
11
and
12
remain unused in
this case. These terminals carry mains voltage!
The bridge fitted in the works between terminals
3
and
5
must be removed if a
EUROTRONIK-10 system is connected. The bridge can remain between these terminals if
no EUROTRONIK-10 system is connected. Terminals
2
and
4
remain unused in this case.
These terminals carry mains voltage!
Opening any of the contacts between terminals
13
and
14
or
3
and
5
causes filter pump,
dosing systems and heater to be turned off immediately.
Closing any of the contacts between terminals 2 and 4 or 11 and 12 causes forced
switching on of the filter pump, whereas heater and dosing systems are switched off.
