4
CONTENTS
Page
1. Constant-pressure control 5
1.1 Description 5
1.2 Function 5
1.3 System sizing 7
1.4 SQE and SQE-NE 7
1.5 Positioning the pressure sensor 8
1.6 Precharge pressure setting 8
1.7 Pressure relief valve 8
2. Operating functions 9
2.1 On/Off button 9
2.2 Indication of pump operation 9
2.3 Pressure setting 9
2.4 Button locking 10
3. Alarm functions 10
3.1 Service alarm 10
3.2 Dry-running protection 11
4. Position of LEDs 12
5. CU 301 with R100 13
5.1 Menu OPERATION 15
5.1.1 Pressure setting 15
5.1.2 Operating mode 15
5.1.3 Alarm 15
5.2 Menu STATUS 16
5.2.1 Operating mode 16
5.2.2 Actual pressure 16
5.2.3 Speed 16
5.2.4 Temperature 16
5.2.5 Power input and power consumption 16
5.2.6 Operating hours and number of starts 17
5.3 Menu INSTALLATION 17
5.3.1 Sensor 17
5.3.2 Choice of sensor 17
5.3.3 Maximum pressure setting 17
5.3.4 Automatic restart 18
5.3.5 Dry-running stop 18
5.3.6 Maximum speed 18
5.3.7 Cut-in speed 18
5.3.8 Buttons on the CU 301 19
5.3.9 Indication of pump operation 19
5.3.10 Number 19
6. Print 20
7. Troubleshooting 21
7.1 Service 21
8. Technical data 25
8.1 Electrical connection 26
8.1.1 Mains supply 27
8.1.2 Pump supply 27
8.1.3 Pressure sensor 27
9. Pressure sensor voltage chart 28
10. Disposal 29
Prior to installation, read these installation
and operating instructions. Installation and
operation must comply with local regula-
tions and accepted codes of good prac-
tice.
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