English (GB)
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2. Installing the product
CU 323 is only intended for factory wiring.
Before installing the product, check the following:
• CU 323 corresponds to the order.
• CU 323 is suitable for the supply voltage and
frequency at the installation site.
• CU 323 has not been damaged during
transportation.
The installation must be carried out by authorised
staff in accordance with local regulations.
Observe all safety regulations at the installation site.
Be aware that terminals L and N as well as 70 to 81
may be connected to dangerous contact voltage.
External control voltage from other groups may
occur.
2.1 Location
CU 323 is designed for indoor installation in the front
of a control panel or a separate cabinet.
For outdoor installation, mount CU 323 in a control
cabinet with an enclosure class of minimum IPX4.
2.1.1 Potentially explosive environments
CU 323 must not be installed in potentially explosive
environments, but may be used together with
Grundfos pumps approved for installation in
potentially explosive environments.
2.2 Mechanical installation
Fasten CU 323 with the four M5 x 10 screws
supplied with the product. See fig. 1 (1).
Maximum torque: 1.4 Nm.
For dimensions of CU 323, see section 9. Disposing
of the product.
Fig. 1 Mounting in panel front, standard
Connect the earth terminal between the cable
clamps on CU 323 to the mounting frame. See fig. 1
(2) and fig. 2.
Fig. 2 Earth connection
DANGER
Electric shock
Death or serious personal injury
- Switch off the power supply before you
start any work on the product. Make
sure that the power supply cannot be
accidentally switched on.
DANGER
Electric shock
Death or serious personal injury
- The installation must incorporate a main
switch.
The main switch must be placed close
to CU 323 and easily accessible for the
operator.
The switch must be marked as main
switch for CU 323.
The main switch must be according to
IEC 60947-1 and IEC 60947-3.
WARNING
Electric shock
Death or serious personal injury
- All wires to units outside the control
panel must be of the type H05VV-F
according to CENELEC HD21.
USA and Canada: All wires must
comply with the National Electrical Code
(NEC) and/or Canadian Electrical Code.
Install CU 323 in a well-ventilated location,
and do not place it close to any heat
sources.
TM03 1301 4105
Pos. Description
1 Screw (4 pcs)
2 Mounting frame
TM04 9274 3810
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