Grundfos CU 301 Constant Pressure Box for SQE Pumps

Grundfos CU301 Constant Pressure Box with Transducer for SQE pumps

The CU 301 is a control and communication unit
developed especially for the SQE submersible pumps
in constant-pressure applications.

Transducer Included

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

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.

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