6
Original installation and operating instructions.
CONTENTS
1. Symbols used in this document - 6
2. General information - 6
3. Delivery and handling - 7
3.1 Delivery - 7
3.2 Handling - 7
4. Type keys - 8
4.1 Type NB - 8
4.2 Type NBG - 8
4.3 Impeller diameter - 10
4.4 Pumped liquids - 10
5. Technical data - 10
5.1 Ambient temperature - 10
5.2 Liquid temperature - 10
5.3 Operating pressure - 10
5.4 Min. inlet pressure - 10
5.5 Maximum inlet pressure - 10
5.6 Minimum flow rate - 10
5.7 Maximum flow rate - 10
5.8 Electrical data - 10
5.9 Weight - 10
5.10 Sound level - 10
5.11 Pump speed relative to material and size - 10
6. Pump without motor - 11
6.1 Motor without feet - 11
6.2 Motor with feet - 13
7. Mechanical installation - 15
7.1 Preparations before installation - 15
7.2 Pump location - 15
7.3 Connection - 15
7.4 Foundation of NB, NBG pump without base frame - 16
7.5 Foundation of NB, NBG pump with base frame - 16
7.6 Pipework - 20
7.7 Vibration dampening - 20
7.8 Expansion joints - 21
7.9 Measuring instruments - 21
8. Flange forces and torques - 22
9. Electrical connection - 23
9.1 Motor protection - 23
9.2 Frequency converter operation - 23
10. Start-up - 24
10.1 General information - 24
10.2 Priming - 24
10.3 Checking the direction of rotation - 24
10.4 Start-up - 24
10.5 Start/stop - 24
11. Maintenance - 25
11.1 Pump - 25
11.2 Mechanical shaft seals - 25
11.3 Motor-25
11.4 Lubrication - 25
12. Periods of inactivity and frost protection - 25
13. Service - 25
13.1 Service kits - 25
14. Calculation of minimum inlet pressure - 25
15. Fault finding chart - 26
16. Disposal - 26
1. Symbols used in this document
2. General information
Pump type and model are stated on the pump nameplate
The pumps are fitted with Grundfos motors, type MG or MMG. If
the pump is fitted with a motor make other than Grundfos, please
note that the motor data may differ from the data stated in this
booklet. This may also influence the pump performance.
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!
If these safety instructions are not observed,
it may result in malfunction or damage to the
equipment!
Notes or instructions that make the job easier
and ensure safe operation.
To Next Page
Need help?
General
