Grundfos LC 108 User Manual

English (GB)
2
English (GB) Installation and operating instructions
Original installation and operating instructions
CONTENTS
Page
1. Symbols used in this document
2. General
The LC 108 controller is designed for the control of pumps in
wastewater, water supply and drainage systems.
Type key:
1. Symbols used in this document
2
2. General
2
2.1 Applications
3
2.2 Variants
3
3. Location and mounting
3
3.1 Location
3
3.2 Mounting of LC 108 for direct-on-line starting
3
3.3 Mounting of LC 108 for star-delta starting
4
4. Systems with 2 float switches
5
4.1 Electrical connection
5
4.2 Setting
6
4.3 Control panel
7
4.4 Battery back-up functions
8
4.5 Reset button and ON-OFF-AUTO selector switch
9
5. Systems with 3 float switches
10
5.1 Electrical connection
10
5.2 Setting
10
5.3 Control panel
12
5.4 Battery back-up functions
12
5.5 Reset button and ON-OFF-AUTO selector switch
13
6. Systems with 4 float switches
14
6.1 Electrical connection
14
6.2 Setting
14
6.3 Control panel
16
6.4 Battery back-up functions
16
6.5 Reset button and ON-OFF-AUTO selector switch
17
7. Systems with 2 electrodes
18
7.1 Electrical connection
18
7.2 Setting
18
7.3 Control panel
20
7.4 Battery back-up functions
20
7.5 Reset button and ON-OFF-AUTO selector switch
21
8. Systems with 3 electrodes
22
8.1 Electrical connection
22
8.2 Setting
22
8.3 Control panel
24
8.4 Battery back-up functions
24
8.5 Reset button and ON-OFF-AUTO selector switch
25
9. Systems for filling applications
26
9.1 Electrical connection
26
9.2 Setting
26
9.3 Control panel
28
9.4 Battery back-up functions
28
9.5 Reset button and ON-OFF-AUTO selector switch
29
10. Systems for drainage applications
30
10.1 Electrical connection
30
10.2 Setting
30
10.3 Control panel
32
10.4 Battery back-up functions
32
10.5 Reset button and ON-OFF-AUTO selector switch
33
11. Start-up
34
12. Maintenance
34
13. Technical data
35
14. Fault finding chart
36
15. Disposal
36
Warning
Prior to installation, read these installation and
operating instructions. Installation and operation
must comply with local regulations and accepted
codes of good practice.
Warning
If these safety instructions are not observed, it may
result in personal injury.
Warning
If these instructions are not observed, it may lead to
electric shock with consequent risk of serious
personal injury or death.
Warning
These instructions must be observed for explosion-
proof pumps.
Caution
If these safety instructions are not observed, it may
result in malfunction or damage to the equipment.
Note
Notes or instructions that make the job easier and
ensure safe operation.
Example LC 108 400 3 23 SD
LC = one-pump controller
108 = type designation
Phase voltage [V]
1 = single-phase
3 = three-phase
Maximum operating current per pump [A]
SD = Star-delta starting

Grundfos LC 108 Specifications

General

Brand	Grundfos
Model	LC 108
Category	Control Unit
Language	English