English (GB)
9
The supply voltage and frequency are marked on the
pump nameplate. The voltage tolerance must be
within - 10 %/+ 6 % of the rated voltage. Make sure
that the motor is suitable for the power supply
available at the installation site.
All pumps are supplied with 10 m power cable and a
free cable end, except for pumps for Australia which
have 15 m cable.
Pumps without sensor must be connected to one of
these two controller types:
• a control box with motor-protective circuit
breaker, such as a Grundfos CU 100 control box
• a Grundfos LC, LCD 107, LC, LCD 108, LC, LCD
110 or DC, DCD pump controller.
Pumps with sensor must be connected to a
Grundfos IO 113 and one of these two controller
types:
• a control box with motor-protective circuit
breaker, such as a Grundfos CU 100 control box
• a Grundfos LC, LCD 107, LC, LCD 108, LC, LCD
110 or DC, DCD pump controller.
Pumps with WIO sensor
Every explosion-proof pump is assembled with a
WIO sensor.
For safe installation and operation of pumps
equipped with a WIO sensor, we recommend that
you install an RC filter between the power supply
and the pump.
Please note that the following aspects may cause
problems in case of transients in the power supply
system:
• Motor power:
– The bigger the motor, the higher the transients.
• Length of power cable:
– Where power and signal cables are running in
parallel close to each other, the risk of
transients causing interference between power
and signal cables will increase with the length
of the cables.
• Switchboard layout:
– Power and signal cables must be physically
separated as much as possible. Close
installation can cause interference in case of
transients.
• Supply network "stiffness":
– If a transformer station is located close to the
installation, the supply network may be "stiff"
and transient levels will be higher.
If combinations of the above aspects are present, it
may be necessary to install RC filters for pumps with
WIO sensors to protect against transients.
Transients can be completely eliminated if soft
starters are used. But be aware that soft starters and
variable-speed drives have other EMC-related
issues that must be taken into consideration. For
more information, see section 8. Servicing the
product.
For further information see the installation and
operating instructions for the selected control box or
pump controller.
Observe the following points:
• Do not install Grundfos control boxes,
pump controllers, Ex barriers, or leave
the free end of the power cable, in
potentially explosive environments.
• The classification of the installation site
must be defined by the owner of the
site in each individual case.
• On explosion-proof pumps, make sure
that an external earth conductor is
connected to the external earth
terminal on the pump using a secure
cable clamp. Clean the surface of the
external earth connection and mount
the cable clamp.
• The cross section of the earth
conductor must be at least 4 mm
2
, e.g.
type H07 V2-K (PVT 90 °) yellow and
green.
• Make sure that the earth connection is
protected from corrosion.
• Make sure that all protective equipment
has been connected correctly.
• Float switches used in potentially
explosive environments must be
approved for this application. They
must be connected to the Grundfos LC,
LCD 108 or DC, DCD pump controller
via the intrinsically safe LC-Ex4 barrier
to ensure a safe circuit.
Set the motor-protective circuit breaker to
the rated current of the pump. The rated
current is stated on the pump nameplate.
A damaged power cable must be replaced
by the manufacturer, its service agent or
similarly qualified persons.
Before installation and the first startup of
the pump, check the condition of the power
cable visually to avoid short circuits.
If an RC filter is installed to avoid any kind
of transients in the installation, install the
RC filter between the power supply and
the pump.
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