Grundfos NBG Series - 1 Symbols Used in this Document; 2 General Information; Table of Contents

English (GB)
2
English (GB) Installation and operating instructions
Original installation and operating instructions
CONTENTS
Page
1. Symbols used in this document
2. General information
NB, NBG are non-self-priming, single stage,
centrifugal volute pumps with axial suction port and
radial discharge port.
NB pumps comply with EN 733.
NBG pumps comply with ISO 2858.
1. Symbols used in this document
2
2. General information
2
3. Delivery and handling
3
3.1 Delivery
3
3.2 Handling
3
4. Identification
4
4.1 Nameplate
4
4.2 Type key
5
5. Applications
7
5.1 Pumped liquids
7
6. Operating conditions
7
6.1 Ambient temperature and altitude
7
6.2 Liquid temperature
7
6.3 Max. operating pressure
8
6.4 Min. inlet pressure
8
6.5 Max. inlet pressure
8
6.6 Min. flow rate
8
6.7 Max. flow rate
8
6.8 Shaft seals
9
7. Pump without motor
10
7.1 Mounting of motor on pump housing
without feet
10
7.2 Mounting of motor on pump housing with
feet
12
8. Mechanical installation
14
8.1 Preparations before installation
14
8.2 Pump location
14
8.3 Connection
15
8.4 Foundation of NB, NBG pump without
base frame
15
8.5 Foundation of NB, NBG pump with base
frame
16
8.6 Pipework
19
8.7 Vibration dampening
20
8.8 Expansion joints
20
8.9 Measuring instruments
21
9. Flange forces and torques
22
10. Electrical connection
24
10.1 Motor protection
24
10.2 Frequency converter operation
24
11. Commissioning and startup
25
11.1 General information
25
11.2 Commissioning
25
11.3 Priming
25
11.4 Checking the direction of rotation
25
11.5 Startup
26
11.6 Shaft seal run-in period
26
11.7 Start/stop
26
11.8 Reference readings of monitoring
equipment
26
12. Maintenance
27
12.1 Pump
27
12.2 Mechanical shaft seals
27
12.3 Motor
27
12.4 Lubrication
27
13. Periods of inactivity and frost
protection
27
14. Service
27
14.1 Service kits
27
15. Technical data
27
15.1 Electrical data
27
15.2 Sound pressure level
27
16. Fault finding
28
17. Disposal
29
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.
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.