Electrical Connection; Ciu Unit (Communication Interface); Electrical Connection - Single-Phase Pumps - Grundfos SEG AUTOADAPT Montage- Und Betriebsanleitung

9. Electrical connection

The pump must not be used with
Caution
a frequency converter.
The electrical connection should be carried out in
accordance with local regulations.
Warning
The pump must be connected to an
electrical panel in accordance with
local regulations. The electrical panel
typically includes fuses, main switch
and earth leakage circuit breaker with
a contact separation according to
EN 60204-1, 5.3.2.
It must be possible to lock the mains
switch in position 0. Type and
requirements as specified in
EN 60204-1, 5.3.2.
The pump incorporates a motor-
protective circuit breaker and all
control logic.
Warning
If the pump has an Ex mark on the
nameplate, make sure that the pump is
connected in accordance with the
instructions given in this booklet.
Warning
The explosion protection classification
of the pump is CE
T4 Gb. See section 4.2.
The classification of the installation
site must in each individual case be
approved by the local authorities.
The CIU unit, if used, (see section 9.1)
must not be installed in potentially
explosive environments.
Warning
On explosion-proof pumps, make sure
that an external earth conductor is
connected to the external earth
terminal on the pump using a
conductor with a secure cable clamp.
Clean the surface for external earth
connection, and fit the cable clamp.
The cross section of the earth
conductor must be at least 4 mm
type H07 V2-K (PVT 90 °) yellow/green.
Make sure that the earth connection is
protected from corrosion.
Warning
Before installation and the first start-up
of the pump, check the cable for visible
defects to avoid short-circuits.
Warning
The pump must not run dry.
The supply voltage and frequency are marked on the
pump nameplate. For voltage tolerance, see section
14.1 Supply voltage. Make sure that the motor is
suitable for the power supply available at the
installation site.
All pumps are supplied with 10 metres of cable and
a free cable end.

9.1 CIU unit (communication interface)

The Grundfos CIU unit (CIU = Communication
Interface Unit) is used as a communication interface
between an SEG pump and a main network.
The CIU unit is optional. See separate installation
and operating instructions supplied with the unit.
9.2 Electrical connection –
The pump has a patented start function which
eliminates the need of a starting capacitor.
The operating capacitor is incorporated in the pump.
II 2 G, Ex bcd IIB
2
, e.g.
A possible replacement of the cable
must be carried out by Grundfos or
Caution
an authorised service workshop.
single-phase pumps
2 A 230 VAC
Fig. 3 Wiring diagram for single-phase pumps
2 A 230 VAC
17