Product Manual

SQ, SQE construction
SQ, SQE, CU 331, and SP
9
29
Control units for SQ, SQE
CU 301
The CU 301 is a control and communication unit
developed especially for the SQE submersible pumps
in constant-pressure applications.
The CU 301 control unit provides:
• Full control of the SQE pumps
• two-way communication with the SQE pumps
• possibility of adjusting the pressure
• alarm indication (LED) when service is needed
• possibility of starting, stopping and resetting the
pump simply by means of a push-button
• configuration with R100 remote control.
The CU 301 communicates with the pump via mains
borne signalling (Power Line Communication),
meaning that no extra cables are required between the
CU 301 and the pump.
The CU 301 features the following indications (see
drawing in right column):
1. Pump running indicator
2. System pressure setting
3. System ON/OFF
4. Button lock indicator
5. Dry-running indicator
6. Service needed in case of:
– no contact to pump
– overvoltage
– undervoltage
– speed reduction
– overtemperature
– overload
– sensor defective.
The CU 301 incorporates:
• External signal input for pressure sensor
• connection to an operating relay for indication of
pump operation.
Optional R100 remote control
Wireless infrared remote control of the CU 301 is
possible by means of the R100.
Using the R100, it is possible to monitor and change
the operating parameters, see the R100 menu
structure on page 30.
The R100 is a valuable tool in case fault finding is
required.
Fig. 15 CU 301 control unit
Fig. 16 CU 301 entry ports
Fig. 17 CU 301 dimensions
TM03 3426 0406TM02 3427 0406TM03 3003 2010
bar
5.0
4.5
4.0
3.5
3.0
2.5
2.0
23
4
1
5
6
R 100
R100
Pressure sensor
entry
Power supply
entry
Submersible drop
cable entry
Operating relay
entry
9.13 in.
(232 mm)
4.49 in.
(114 mm)
7.68 in.
(195 mm)
bar
5.0
4.5
4.0
3.5
3.0
2.5
2.0