Electrical Connection - Grundfos LC 231 Montage- Und Betriebsanleitung

3. Pull out the flat cable that is connected to the circuit board. Do
not remove the flat cable from the front cover.
2.2.4 Installing the control unit
The product is designed to be mounted on a flat and
vertical surface. The cable glands must face downwards.
1. Loosen the screws and remove the front cover.
Be careful not to damage the cable between the front cover
and the back cover.
2. Drill holes in the surface.
255 (10.0")
280 (11.0")
3. Insert wall plugs, if applicable.
4. Fit the four screws in the mounting holes and cross-tighten the
screws, 1.25 Nm.
The mounting screws must have a minimum length of
32 mm (Ø 8.2 mm). If the wall is more than 3 mm
uneven, insert rubber blocks between the surface and
the control unit to even the surface. The box of the
control unit must not be bent.
Related information
2.2.2 Removing the front cover
2.2.5 Installing a communication interface module
You can fit a communication interface module (CIM) in the control
unit to enable communication with external systems. The module is
optional and is not delivered with the product. See the installation
and operating instruction for the module regarding electrical
connections.
Use an antistatic service kit when handling electronic
components. This prevents static electricity from
damaging the components.
1. Loosen the screws and remove the front cover.
Be careful not to damage the cable between the front cover
and the back cover.
2. Push the module on to the three guide pins and into the socket.
Press the module home, using your fingers.
3. Fit the screw to lock the module.
4. Place the labels supplied with the module on the back of the
front cover.
5. Make the electrical connections to the module as described in
the instructions supplied with the module.
6. Route the wires for the module through one of the cable
glands.
For modules with LAN or antenna cables, you must order an
additional cable gland M20.
7. Fit the cover and cross-tighten the mounting screws.
Related information
2.2.2 Removing the front cover
4.7 Supported communication interface modules and protocols
8.20 Code 159 (Communication error CIMxxx)
2.2.6 Removing the membrane
For applications where drainage is required, the membrane must be
removed.
1. Pull the membrane off the back of the control unit.
115 (4.5")

2.3 Electrical connection

2.3.1 Cable requirements
WARNING
Electric shock
Death or serious personal injury
‐
‐
The wires from the pump phases must be rated at 90
°C (194 °F).
The wires from the temperature sensor, if any, must be
rated at 480 V and 70 °C (158 °F).
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