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LS
Grundfos LS User Manual
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99212774
04.2024
ECM: 1392621
www
.grundfos.com
Trademarks displayed in this material, including but not limited to Grundfos and the Grundfos logo, are registered trademarks owned by The Grundfos Group.
© 2024 Grundfos Holding A/S, all rights reserved.
48
Table of Contents
English (GB)
4
1. General information
5
1.1 Hazard statements
5
1.2 Notes
5
2. Receiving the product
6
2.1 Inspecting the product
6
2.2 Temporary storage
6
3. Installing the product
6
3.1 Location
6
3.2 Mechanical installation
6
3.2.1 Lifting the product
7
3.2.2 Foundation
7
3.2.3 Vibration dampers
7
3.2.4 Expansion joints
7
3.2.5 Foundation and preliminary alignment
8
3.2.6 Installing coupling guard
12
3.3 Electrical connection
14
3.3.1 Frequency converter operation
14
3.4 Pipes
15
3.4.1 General precautions
15
3.4.2 Inlet pipes
15
3.4.3 Valves in the inlet pipe
15
3.4.4 Outlet pipe
15
3.4.5 Auxiliary pipes
16
3.4.6 Measuring instruments
16
3.5 Inlet pipe guidelines
17
3.5.1 Common guidelines
17
3.5.2 Flooded systems
17
3.5.3 Suction lift systems
17
3.5.4 Inlet pipe if the feed line comes in different horizontal planes
18
3.5.5 Inlet pipe with a horizontal elbow in the feed line
18
3.5.6 Installations with vertical inlet pipe in confined space
19
4. Starting up the product
20
4.1 General information
20
4.1.1 Pumps with stuffing box
20
4.1.2 Flushing the pipe system
20
4.2 Prestart checks
20
4.2.1 Bearings
20
4.2.2 Stuffing boxes
20
4.2.3 Pressure gauges
20
4.2.4 Direction of rotation
20
4.3 Priming
21
4.3.1 Opening of valves
21
4.4 Startup
22
4.5 Final alignment
22
4.5.1 Aligning the pump and motor with a straightedge ruler
23
4.5.2 Aligning the pump and motor with a dial indicator
24
4.5.3 Aligning the pump and motor with a laser equipment
26
4.5.4 Tightening torques
29
4.5.5 Pin coupling air-gap width S2
29
5. Product introduction
30
5.1 Applications
30
5.2 Pumped liquids
30
5.3 Identification
30
5.3.1 Nameplate
30
5.3.2 Type key
31
6. Servicing the product
34
6.1 Contaminated pumps
34
6.2 Operating checks
34
6.3 Maintaining the product
34
6.3.1 General information
34
6.3.2 Frequency of inspections
34
6.3.3 Lubrication
35
7. Taking the product out of operation
36
7.1 Short-term shutdown
36
7.2 Long-term shutdown
36
8. Fault finding the product
38
8.1 The pump delivers no liquid
38
8.2 The pump does not deliver enough liquid
38
8.3 The pump does not create enough pressure
39
8.4 The pump loses liquid after running for a short time
40
8.5 The pump consumes too much power
40
8.6 The motor is overloaded
41
8.7 Vibrations
41
8.8 Cavitation noise
42
8.9 The pump bearings are overheated
42
8.10 The pump operates for a short time and then stops
42
9. Technical data
43
9.1 Operating conditions
43
9.1.1 Ambient temperature and altitude
43
9.1.2 Liquid temperature
43
9.1.3 Pressure in the pump
43
9.1.4 Flow rate
44
9.1.5 Frequency of starts and stops
44
9.2 Flange forces and torques
45
10. Disposing of the product
46
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Grundfos LS Specifications
General
Type
Submersible Pump
Protection class
IP68
Frequency
50 Hz
Application
Drainage
Liquid Temperature
0 °C to 40 °C
Seal Type
Mechanical seal
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