Wiring Diagrams; Cu 100 Control Box - Grundfos SL1.50 Installation And Operating Instructions Manual

Warning
If the supply cable is damaged, it must
be replaced by the manufacturer, its
service agent or a similarly qualified
person.
Set the motor-protective circuit breaker
to the rated current of the pump. The
Caution
rated current is stated on the pump
nameplate.
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.
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 cable and a free
cable end.
The pump must be connected to one of these two
controller types:
• a control box with motor-protective circuit
breaker, such as Grundfos CU 100 control box
• a Grundfos LC, LCD 107, LC, LCD 108 or
LC, LCD 110 pump controller.
See fig. 4 or 5 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 the pump, check the condition of the
cable visually to avoid short circuits.
For more information about the function of the
thermal switches, see 8.4 Thermal switches.
32

8.1 Wiring diagrams

L N
PE
PE
1 2 3
1
Fig. 4 Wiring diagram for single-phase pumps
L1 L2 L3
PE
PE
1 2 3
3
Fig. 5 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 size, see the table:
Pump type
SL1 and SLV
4 5 6
T2 T1 T3
˚ ˚
160 C 150 C
4 5 6
T2 T1 T3
˚ ˚
170 C 150 C
Run capacitor
[μF] [V]
30 450