Grundfos LCD 108, Инструкция по установке и эксплуатации

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10
AC/DC selector:
The AC/DC selector switch for electrodes and/or float switches is
placed as shown in fig. 6.
Fig. 6
If the distance between the controller and pit exceeds 20 metres,
it is not advisable to use electrodes as problems with the signal
values sent back to the controller may arise. In such cases, it is
recommended to use float switches.
4.3 Control panel
Parallel operation with 4 float switches, pages 25 and 26.
Figure 7 shows the control panel of the CU 212 module.
Fig. 7
Key to the symbols in fig. 7:
TM
02
57
47
39
02
Operation with electrodes and
float switches:
Selector switch in position AC:
It is possible to connect 3
electrodes (1 as reference
electrode) and 2 float switches.
The controller transmits a 13 to
18 VAC signal.
Operation with float switches:
Selector switch in position AC:
It is possible to connect 4 float
switches.
The controller transmits a 13 to
18 VAC signal.
Operation with float switches:
Selector switch in position DC:
It is possible to connect 4 float
switches.
Cables of up to 100 metres can be
connected between the controller
and the float switches.
The controller transmits a 12 VDC
signal.
AC 1 2
13-18 VAC
0 V
AC DC
G 3 4
AC 1 2
13-18 VAC 0 V
AC DC
G 3 4
AC 1 2
12 VDC 0 V
AC DC
G 3 4
TM
01 639
7 390
2
Pos. Description
1
Green indicator light for pump 1 and 2, indicating
starting delay (flashing) and pump operation
(permanently on).
2
Red indicator light for pump 1 and 2.
Flashing: Fault in PTC resistor/thermal switch
On: Fault in motor-protective circuit breaker.
3
Red indicator light, indicating wrong phase sequence
(only certain variants and three-phase pumps only).
4 Red indicator light, indicating common alarm.
5
ON-OFF-AUTO selector switch for pump 1, three
positions, see section
4.5
.
6
ON-OFF-AUTO selector switch for pump 2, three
positions, see section
4.5
.
7
Reset button, push-button for manual resetting of alarm
signals to
external
alarm devices and the built-in buzzer
(only certain variants), see section
4.5
.
8
Orange indicator light, which is activated by the float
switch for common stop.
9
Orange indicator light, which is activated by the float
switch for start of the first pump.
10
Orange indicator light, which is activated by the float
switch for start of the next pump.
11
Orange indicator light, which is activated by the float
switch for high-level alarm. In case of high-level alarm,
the indicator light is flashing.
12
Green indicator light, indicating that the electricity
supply has been switched on.
CU 212
2 1
1
2
1 2 3 4
7
5 6
12
11
9
8
10