General Information - Grundfos NK Serie Instrucciones De Instalación Y Funcionamiento

English (GB) Installation and operating instructions
Original installation and operating instructions.
CONTENTS
1. Symbols used in this document
2.

General information

3. Receiving the product
3.1 Delivery
3.2 Transporting the product
3.3 Handling
3.4 Storing the product
4. Identification
4.1 Nameplate
4.2 Type key
5. Applications
5.1 Pumped liquids
6. Operating conditions
6.1 Ambient temperature and altitude
6.2 Liquid temperature
6.3 Maximum operating pressure
6.4 Minimum inlet pressure
6.5 Maximum inlet pressure
6.6 Minimum flow rate
6.7 Maximum flow rate
6.8 Shaft seals
7. Mechanical installation
7.1 Pump location
7.2 Foundation and grouting of horizontally mounted NK,
NKG pumps with base frame
7.3 Alignment
7.4 Pipework
7.5 Vibration damping
7.6 Expansion joints
7.7 Stuffing box piping
7.8 Bearing bracket
7.9 Bearing monitoring
7.10 Pressure gauge and mano-vacuum gauge
7.11 Ammeter
8. Flange forces and torques
9. Electrical connection
9.1 Motor protection
9.2 Frequency converter operation
10. Commissioning and startup
10.1 General information
10.2 Commissioning
10.3 Priming
10.4 Checking the direction of rotation
10.5 Startup
10.6 Shaft seal run-in period
10.7 Motor start/stop
10.8 Reference readings of monitoring equipment
11. Maintenance
11.1 Pump
11.2 Lubrication of bearings in bearing bracket
11.3 Monitoring equipment
11.4 Motor
12. Periods of inactivity and frost protection
13. Service
13.1 Service kits
14. Technical data
14.1 Electrical data
14.2 Sound pressure level
14.3 Belt drive
14.4 Operation with combustion engine
15. Fault finding
16. Disposal
Warning
Prior to installation, read these installation and
operating instructions. Installation and operation
Page
must comply with local regulations and accepted
codes of good practice.
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1. Symbols used in this document
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Warning
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If these safety instructions are not observed, it may
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result in personal injury.
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If these safety instructions are not observed, it may
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Caution
result in malfunction or damage to the equipment.
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Notes or instructions that make the job easier and
Note
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ensure safe operation.
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2. General information
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NK, NKG are non-self-priming, single stage, centrifugal volute
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pumps with axial suction port and radial discharge port.
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NK pumps comply with EN 733.
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NKG pumps comply with ISO 2858.
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11 3. Receiving the product
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3.1 Delivery
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The pumps are tested 100 % before leaving the factory. The test
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includes a function test where the pump performance is
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measured to ensure that the pump meets the requirements of
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relevant standards. Test certificates are available from Grundfos.
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After the installation, the alignment of pump and motor must be
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checked again. See section
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3.2 Transporting the product
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Always transport the pump in the specified position. During
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transport, the pump must be fastened securely to prevent
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damage to the shaft and shaft seal caused by excessive
vibrations and knocks. The pump must not be lifted by the shaft.
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Warning
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Pay attention to the pump weight, and take
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precautions to prevent personal injury if the pump
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should topple or fall by accident.
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7.3 Alignment.
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