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Grundfos NB User Manual

Grundfos NB
51 pages
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NB, NBG, MTB
Installation and operating instructions
NB NBG MTB
Installation and operating instructions
(all available languages)
http://net.grundfos.com/qr/i/QR96483177
GRUNDFOS INSTRUCTIONS

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Grundfos NB Specifications

General IconGeneral
Insulation ClassF
Pump TypeCentrifugal
Frequency50 Hz
MaterialStainless Steel
Seal TypeMechanical Seal
ApplicationsWater Supply, Pressure Boosting, Irrigation
Flange StandardDIN
Impeller MaterialStainless Steel
VoltageVaries depending on model (e.g., 3 x 220-240D/380-415Y V, 3 x 380-415D/660-690Y V)

Summary

General Information

Hazard Statements

Explains hazard symbols and statements used in instructions.

Notes

Explains symbols used for important notes and tips.

Product Introduction

Product Description

Describes NB, NBG, and MTB pumps and their applications.

Identification

Details how to identify pump models and their components via nameplates.

Nameplate

Type Key, NB, NBG

Type Key, MTB

Receiving the Product

Performance Test

States pumps are tested before factory dispatch.

Transporting the Product

Provides warnings and precautions for safely handling and moving the pump.

Inspecting the Product

Guides on checking product conformity, voltage, and for any damage upon receipt.

Storage After Delivery

Advises on proper storage to prevent corrosion or damage.

Installing the Product

Mounting of Motor on Bare Shaft Pumps

Instructions for mounting the motor onto pumps without a base frame.

Mounting of Motor on Pump Housing with Feet

Steps for attaching the motor to pumps with feet.

Vertical Installation Clearances

Specific clearance requirements for vertical pump installations.

Horizontal Installation Clearances

Clearance requirements for horizontal pump installations.

MTB Minimum Clearance

Clearance specifications for MTB pump installations.

Mechanical Installation

Lifting the Product

Instructions and safety precautions for lifting the pump unit.

Installation Positions

Shows pump installation orientations and flow direction.

Foundation of NB, NBG, MTB Pump Without Base Frame

Requirements for preparing a concrete foundation for pumps without base frames.

Foundation of NB, NBG Pump with Base Frame

Guidelines for creating a foundation for pumps with base frames.

Pipe Installation

Details on installing inlet and outlet pipes without stressing the pump.

Elimination of Noise and Vibrations

Methods to achieve optimal operation and minimize noise and vibration.

Vibration Dampers

Guidance on selecting and using vibration dampers for pump isolation.

Expansion Joints

Advantages and installation guidelines for expansion joints in piping.

Pressure Gauge and Mano-Vacuum Gauge Installation

Recommendations for installing pressure gauges for operation monitoring.

Condensation Cover

Advice on fitting condensation covers for outdoor pump installations.

Electrical Connection

Motor Protection

Requirements for protecting the motor against overload and electric shock.

Cable Entry and Screwed Connection, MG Motor

Details on cable entry holes and connections for MG motors.

Torque for Terminal Cover of MG Motors

Specifies tightening torques for MG motor terminal covers.

Synchronous Motors

Connection requirements for synchronous motors using a CUE frequency converter.

Frequency Converter Operation

Guidance on operating pumps with frequency converters and potential effects.

Startup

Flushing the Pipe System

Instructions for flushing the pipe system before pump startup.

Priming the Product

Procedures for filling and venting the pump with liquid.

Priming the Product in Open Systems Where the Liquid Level is Below the Pump Inlet

Steps to prime the pump in systems with liquid below inlet.

Checking the Direction of Rotation

How to verify the correct direction of pump rotation.

Starting Up the Pump

Step-by-step guide for safely starting the pump.

Shaft Seal Run-in Period

Explanation of the initial run-in period for mechanical shaft seals.

Number of Motors Starting or Stopping

Table showing maximum allowed motor starts per hour based on frame size and poles.

Reference Readings of Monitoring Equipment

Recommendation to take initial readings for monitoring equipment.

Storing the Product

Precautions for Storage

Recommendations for protecting the pump from moisture, dust, and damage during storage.

Servicing the Product

Contaminated Products

Procedures for handling and returning contaminated pump products.

Service Kits

Information on how to find and order service kits.

Maintaining the Product

Maintenance of the Pump

States that the pump is maintenance-free.

Maintaining the Mechanical Shaft Seals

Guidance on checking and replacing mechanical shaft seals.

Maintaining the Motor

Importance of keeping the motor clean for ventilation.

Lubrication of Motor Bearings

Instructions for lubricating motor bearings based on motor type and size.

Applying Sealant to Plugs

Reminder to apply sealant to plugs during assembly.

Taking the Product Out of Operation

Protecting the Pump During Periods of Inactivity and Frost

Procedures for draining the pump to prevent damage from frost.

Fault Finding the Product

Troubleshooting Common Pump Issues

Lists common faults, their causes, and remedies for pump operation problems.

Technical Data

Operating Conditions

Details on ambient temperature, altitude, and liquid temperature limits.

Maximum Operating Pressure

Guidelines on not exceeding the maximum pressure stated on the nameplate.

Minimum Inlet Pressure

Importance of minimum inlet pressure to avoid cavitation and its causes.

Maximum Inlet Pressure

Constraints on inlet pressure combined with pump pressure.

Minimum Flow Rate

Prohibition of running the pump against a closed valve.

Maximum Flow Rate

Risks associated with exceeding the maximum flow rate.

Shaft Seals

Operating ranges and specifications for different types of shaft seals.

Electrical Data

Refers to the motor nameplate for electrical specifications.

Sound Pressure Level

Tables showing maximum sound pressure levels for different motor configurations.

Disposing of the Product

Environmental Disposal Guidelines

Instructions for environmentally sound disposal of the product and its parts.

Appendix A

China RoHS

Table detailing hazardous substances in product components according to China RoHS.

Appendix B

Flange Forces and Torques

Tables providing force and torque data for cast iron and stainless steel flanges.

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