Grundfos CU 300 Installation and Operating Instructions - Geotech

2. CU 300 as an alarm unit
2.1 Description
When the CU 300 is connected to an SQE pump,
any alarm will be indicated by one of the eight red
indicator lights on the CU 300.
The indications are based on signals from the motor
and from sensors, if installed. The individual alarms
are described in detail in section 11. Alarm functions.
It is possible to connect an external alarm signal
transmitter and an external on/off switch, see section
2.5 Electrical connection concerning connection, etc.
Fig. 2 shows an example of an installation with the
CU 300 as an alarm unit.
Fig. 2
2.4 Mounting the CU 300
The CU 300 is designed for wall mounting.
The box has six mounting holes (ø4), see fig. 3
(dimensions stated in mm).
The CU 300 must be mounted:
• horizontally (see fig. 3) to allow condensed water,
if any, to escape.
• on a plane surface to avoid deformation of the
box.
Fig. 3
104.5
104.5
TM01 2824 2498
100
TM01 3150 4601
140.5
The CU 300 is supplied with a set of gaskets for the
Pg screwed connections.
The gaskets are to be used for the connection of
cables/wires to ensure tight connections (IP 55) and
cable relief.
The CU 300 functions as an alarm unit for the pump.
Furthermore, it is possible to communicate with the
pump via the remote control R100, see also section
12. CU 300 with R100.
2.2 Installation
2.3 Location
Before starting any work on the CU 300,
make sure that the electricity supply has
been switched off and that it cannot be accidentally
switched on.
The CU 300 can be placed both indoors and outdoors.
It must not be exposed to direct sunlight.
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