Wiring Diagrams; Cu 100 Control Box - Grundfos SEG Instrucciones De Instalación Y Operación

Warning
If the supply cable is damaged, it must be
replaced by the manufacturer, his service
agent or similarly qualified person.
Set the motor-protective circuit breaker to
Caution
the rated current of the pump. The rated
current is stated on the pump nameplate.
Warning
If the pump has an FM mark on the
FM
nameplate, make sure that the pump is
connected in accordance with the
instructions given in this booklet.
The supply voltage and frequency are marked on the
pump nameplate. The permissible voltage tolerance
is - 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 metres of cable and a
free cable end.
All pumps are supplied without a control box.
The pump 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 or LC,
LCD 110 pump controller.
See fig. 5 or 6 and the installation and operating
instructions for the selected control box or pump
controller.
Potentially explosive environments
In potentially explosive environments you have two
options:
• Use float switches made for Ex environment and
a safety barrier in combination with either DC,
DCD or LC, LCD 108.
• Use air bells in combination with LC, LCD 107.
Warning
Before installation and the first start-up of
FM
the pump, check the condition of the cable
visually to avoid short circuits.
For more information about the function of the
thermal switches, see section
8.4 Thermal switches.

8.1 Wiring diagrams

Fig. 5 Wiring diagram for single-phase pumps
Fig. 6 Wiring diagram for three-phase pumps

8.2 CU 100 control box

The CU 100 control box incorporates a motor-
protective circuit breaker and is available with level
switch and cable.
Single-phase pumps
A run capacitor must be connected to the control
box.
For capacitor sizes, see the table below.
CS
Pump
(starting capacitor)
type
[kW]
[μF]
0.9 and
150
1.2
1.5 150
125 °C, 135 °C
below apply to
single-phase,
1.5 kW, pumps
CR
(run capacitor)
[V] [μF] [V]
230 30 450
230 40 450
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