Installation; Wiring Diagrams; Maintenance - Grundfos CU 100 Montage- Und Betriebsanleitung

6. Installation

Warning
Before starting any work on pumps
used to pump liquids which could be
constituted as being hazardous to
health, thorough cleaning/venting of
pumps, pits, etc. must be carried out
according to local regulations.
Before making any connections in the
CU 100 or work on pumps, pits, etc., it
must be ensured that the electricity
supply has been switched off and that it
cannot be accidentally switched on.
The control box CU 100 must not be
installed and used for pumps installed
in
potentially explosive environments.
• Check that the control box is suitable for the local
conditions, i.e. pump (current, voltage, etc.).
• Remove transport protectors, if any, from inside
the cabinet.
• Remove the cabinet front and mount the control
box on a plane surface with four screws through
the mounting holes in the back plate of the
cabinet, see fig. 6. The cable entries for the pump
and the float switch must pointing downwards.
B
Fig. 6
Three-phase and
single-phase with
Pos.
start and run
capacitor
A 180
B 155
C 253
D 305

7. Wiring diagrams

The figures in the table below refer to the wiring
diagrams at the end of these instructions.

8. Maintenance

During normal operation, the control box CU 100 is
maintenance-free.
It is advisable to carry out periodic checks of the
control box and the installation, i.e. cable entries,
cables, float switch, gasket of the cabinet front and
the pump. In particularly aggressive environments, it
is advisable to check the contact in the control box.
A
263
Single-phase with
run capacitor
180
133
253
305
Control box
CU 100.230.1.9.30
CU 100.230.1.9.30.A
CU 100.230.1.9.30/150
CU 100.230.1.9.30/150.A
CU 100.230.3.5.A
CU 100.230.3.12.A
CU 100.400.3.5.A
Figure
A
B
C
D
E
F
7