Electrical Connection; Nameplate - Grundfos LC 241 Montage- Und Betriebsanleitung

6. Refit the back cover to the CU product and secure it with the
mounting screw. Secure cables using the cable tie holders.
1.25 Nm
Lead the low-voltage wires from the CIM module through the
right side of the cable tray.
Related information
8.14 Code 159 (Communication error CIMxxx)

2.3 Electrical connection

2.3.1 Motor overload protection
For installation of the motor overload protection, follow the
manufacturer's installation manual.
2.3.2 Protection of controller and supply cables
The controller and power cables must be overload-protected. The
protection must be accomplished using components such as:
• fuse of melt type gL and gG
• fuse type gD
• circuit breaker of type C.
See the rated current for this specific product on the product

nameplate.

See the maximum fuse size for this specific product on the product
nameplate.
Related information
4.6.1 Nameplate
2.3.3 Connecting the pump supply and power supply
Pumps are typically equipped with PTC/Klixon sensors (thermal
switched) which protect against overheating.
Some also have moisture sensors indicating water in the pump.
DANGER
Electric shock
Death or serious personal injury
‐
If national legislation requires a Residual-Current
Device (RCD) or equivalent in the electrical installation,
this must be of at least type B, due to the nature of the
constant DC leakage current.
8
WARNING
Electric shock
Death or serious personal injury
‐
Switch off the power supply before making any
electrical connections. Make sure that the power
supply cannot be switched on accidentally.
‐
Remember to indicate where the main switch is
located by placing a label or similar on the control unit.
‐
Make sure that the voltage between the phase and
neutral does not exceed 250 VAC.
‐
Electrical connections must be carried out according to
the wiring diagrams.
Do not add additional components other than those
illustrated on the wiring diagram. Do not use unused pin
holes for other connections.
Do not connect the phase inputs to the IO 242 module if
the input is higher than 3 x 480 VAC.
All cable glands and plugs must be mounted after the
installation is completed.
If the gaskets are not pre-mounted on the cable glands,
mount them on the cable glands before the control unit is
mounted on the wall.
For the US market only, use flexible metal conduits (FMC)
only.
For the PTC connection, do not connect the third wire
(common wire). It must be isolated with a cable-end cap.
The residual-current circuit breaker must be marked like this:
Take into account the total leakage current of all the electrical
equipment in the installation.
1. Check that the supply voltage and frequency correspond to the
values stated on the nameplate.
2. Cut the power supply and pump cables as short as possible.
3. Before switching the power on, check all voltages with a
multimeter and ensure that the voltage between neutral and
each phase does not exceed 250 VAC.