Electrical Connection, Three-Phase Pumps; Alarm Relay/Communication Connection; Configuring The Product; Default Settings 14 Note - Grundfos SEG AUTOADAPT Montage- Und Betriebsanleitung

8.3 Electrical connection, three-phase
pumps
The pump motor is designed so that the phase
sequence in the terminal box is clockwise. This can
be determined with a phase sequence detector. The
pump does not start unless the phase sequence is
correct.
If the dry-running sensors are covered by liquid, and
the pump does not start, the cause may be wrong
phase sequence. Interchange L1 and L2.
Fig. 5 Wiring diagram for three-phase pumps

8.4 Alarm relay/communication connection

The pump incorporates an alarm relay output. NC
and NO are available and can be used as required,
for example for acoustic or visual alarms. Maximum
load of relay is 230 VAC 2 A.
Alternatively, the wires 4 and 6 can be used for
external communication via a CIU unit
(communication interface).
If a CIU unit is connected, the relay must
Note
not be used. The CIU unit incorporates a
relay which takes over the alarm function.
See example of wiring diagram in the documentation
supplied with the CIU unit.
14

9. Configuring the product

9.1 Default settings
The pump is supplied from the factory with the
following default settings.
Parameter
Start delay (random)
Start level
High-level alarm
Anti-seizing:
Interval
Duration
If one or more of the above parameters are to be
changed, use the optional CIU unit together with a
Grundfos GO.
The CIU unit can be connected temporarily for
configuration. If no CIU units are available, change
the parameters by using the Grundfos PC Tool. For
further information, see the installation and operating
instructions for the CIU unit.
Fig. 6 Start and stop levels

9.2 Pump alternation

If several pumps (up to four) are installed in the
same pit, the control logic incorporated in the pumps
ensures that the load is distributed evenly among the
pumps over time.
Alternation is carried out according to a patented
method based on measurement of the liquid level in
the pit.
The barometric pressure may affect the
Note
alternating sequence.
0.9 - 4.0 kW
Off
25 cm
+ 10 cm
3 days
2 seconds
Alarm
Start
Stop