Grundfos LCD 108 Installations- Und Bedienungsanleitung Seite 9

• Switches 5, 6 and 7, stop delay:
When the DIP switch setting is changed, the controller must
be switched off for at least 1 minute!
The stop delay is the time from the stop signal is given until the
pump is stopped.
It must be ensured that the pump is not running dry.
0 sec.
15 sec.
30 sec.
45 sec.
• Switch 8:
When the DIP switch setting is changed, the controller must
be switched off for at least 1 minute!
Switch 8 has no function in connection with the actual
application (parallel operation with 3 float switches,
pages 142 and 143), but this setting must be
maintained!
• Switch 9, automatic alarm resetting:
When the DIP switch setting is changed, the controller must
be switched off for at least 1 minute!
This setting ensures automatic resetting of alarm
signals to external alarm devices and the built-in
buzzer. However, an alarm signal will only be reset if
the cause of the fault no longer exists.
At this setting, the alarm signal must be reset manually
by means of the reset button (the reset button is
described in section 4.5).
• Switch 10, automatic restarting:
When the DIP switch setting is changed, the controller must
be switched off for at least 1 minute!
This setting enables automatic restarting after the PTC
resistance/thermal switch of the motor has cut out the
pump. Restarting will not be carried out until the motor
has cooled to normal temperature.
When the pumps connected are used in explosion
hazard areas, switch 10 must not be in this
position!
At this setting, the pump must be restarted manually after
the PTC resistance/thermal switch of the motor has cut
out the pump. To restart the pump, push the
ON-OFF-AUTO selector switch into position OFF for a
short period (the ON-OFF-AUTO selector switch is
described in section 4.5).
When the pumps connected are used in explosion
hazard areas, switch 10 must be in this position!
60 sec.
90 sec.
120 sec.
180 sec.
AC/DC selector:
The AC/DC selector switch for electrodes and/or float switches is
placed as shown in fig. 7.
Fig. 7
Operation with electrodes and
float switches:
Selector switch in position AC:
It is possible to connect 3
13-18 VAC 0 V
electrodes (1 as reference
electrode) and 2 float switches.
AC 1 2 G 3 4
The controller transmits a 13 to
AC DC
18 VAC signal.
Operation with float switches:
Selector switch in position AC:
It is possible to connect 4 float
13-18 VAC 0 V
switches.
The controller transmits a 13 to
AC 1 2 G 3 4 18 VAC signal.
AC DC
Operation with float switches:
Selector switch in position DC:
It is possible to connect 4 float
switches.
12 VDC 0 V
Cables of up to 100 metres can be
connected between the controller
AC 1 2 G 3 4
and the float switches.
AC DC The controller transmits a 12 VDC
signal.
If the distance between the controller and pit
exceeds 20 metres, it is not advisable to use
electrodes as problems with the signal values
Note
sent back to the controller may arise.
In such cases, it is recommended to use float
switches.
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