Electrical Connection - Three-Phase Pumps; Alarm Relay/Communication Connection; Configuration; Default Settings - Grundfos AUTOADAPT SL1 Serie Instrucciones De Instalación Y Funcionamiento

8.3 Electrical connection - three-phase
pumps
The pump motor is designed so that the phase
sequence in the electrical panel is clockwise (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 a wrong
phase sequence. Interchange L1 and L2.
Fig. 6 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
relay load is 230 VAC 2 A.
Alternatively, the wires 4 and 6 can be used for
external communication via a CIU.
If a CIU is connected, the relay must not
Note
be used. CIU incorporates a relay which
takes over the alarm function.
See example of wiring diagram in the documentation
supplied with the CIU unit.

9. Configuration

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 together with a
Grundfos GO.
CIU can be connected temporarily for configuration.
If no CIU is available, the parameters can be
changed by means of Grundfos PC-tool. For further
information, see installation and operating
instructions for CIU.
Fig. 7 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 pump
will ensure 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 - 1.5 kW
Off
25 cm
+ 10 cm
3 days
2 sec.
Alarm
Start
Stop
15