Grundfos NB Series Installation And Operating Instructions Manual
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Grundfos NB Series Installation And Operating Instructions Manual

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GRUNDFOS INSTRUCTIONS
NB, NBG
Installation and operating instructions

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Summary of Contents for Grundfos NB Series

  • Page 1 GRUNDFOS INSTRUCTIONS NB, NBG Installation and operating instructions...

  • Page 2: Table Of Contents

    English (GB) Installation and operating instructions Original installation and operating instructions Maintenance 12.1 Pump CONTENTS 12.2 Mechanical shaft seals 12.3 Motor Page 12.4 Lubrication Symbols used in this document Periods of inactivity and frost General information protection Receiving the product Service Delivery 14.1 Service kits...

  • Page 3: Receiving The Product

    The test includes a function test where the pump performance is measured to ensure that the pump meets the requirements of relevant standards. Test certificates are available from Grundfos. 3.2 Transporting the product Always transport the pump in the specified position.

  • Page 4: Storing The Product

    3.4 Storing the product The contractor must inspect the equipment on delivery and make sure that it is stored in such a way that corrosion and damage are avoided. If more than six months will pass before the equipment is put into operation, please consider applying a suitable corrosion inhibitor to the internal pump parts.

  • Page 5: Type Key

    4.2 Type key Model B Example 1, pump design according to EN 733 32 -125 .1 /142 AE F 1 A E S BAQE Example 2, pump design according to ISO 2858 NBG 125 -100 -160 /160-142 A F 2 N K S DQQK Type range Nominal diameter of inlet port (DN) Nominal diameter of outlet port (DN)
  • Page 6 Example 1, pump design according to EN 733 32 -125 .1 /142 AE F 1 A E S BAQE Example 2, pump design according to ISO 2858 NBG 125 -100 -160 /160-142 A F 2 N K S DQQK Bronze H EN-GJL-250 EN-GJL-250 1.4401...
  • Page 7 Example 1 shows an NB 32-125.1 pump with these Example 2 shows an NBG 125-100-160 pump with characteristics: these characteristics: • reduced performance • 160-142 mm conical impeller • 142 mm impeller • basic version • basic version • DIN flange to EN 1092-2 pipe connection •...

  • Page 8: Applications

    5. Applications 6.2 Liquid temperature -40 - +140 °C. 5.1 Pumped liquids The maximum liquid temperature is stated on the Clean, thin, non-explosive liquids without solid pump nameplate. It depends on the shaft seal particles or fibres. The pumped liquid must not attack chosen.

  • Page 9: Minimum Inlet Pressure

    • The flow rate is considerably higher than the pump when selecting it in Grundfos Product Center. pump's rated flow rate. See www.grundfos.com. •...

  • Page 10: Shaft Seals

    6.8 Shaft seals The operating range of the seals is described for two We do not recommend that you operate main applications: Pumping of water or pumping of the pump at maximum temperature and coolants. Note maximum pressure at the same time as Seals with a temperature range of 0 °C and up are the seal life will be reduced and periodic mainly used for pumping water, while seals for...

  • Page 11: Mounting Of Motor On Bare Shaft Pumps

    7. Mounting of motor on bare shaft pumps 7.1 Mounting of motor on pump housing without feet The pumps are supplied with a transport bracket protecting the shaft seal during transport. When you mount the motor, follow the instructions shown in these drawings.
  • Page 12 5. Press down the threaded pipe to ensure that 6. Remove the threaded pipe. the shaft is in bottom position. 7. Apply Loctite 243 to the threads of the set 8. Fit the coupling guard. Tighten the screws to screws. Tighten the set screws to the correct the correct torque.

  • Page 13: Mounting Of Motor On Pump Housing With Feet

    7.2 Mounting of motor on pump housing with feet The pumps are supplied with a transport bracket protecting the shaft seal during transport. When you mount the motor, follow the instructions shown in these drawings. 1. Remove the coupling guard and loosen the 2.
  • Page 14 5. Press down the threaded pipe to ensure that 6. Remove the threaded pipe. the shaft is in bottom position. 7. Apply Loctite 243 to the threads of the set 8. Fit the coupling guard. Tighten the screws to screws. Tighten the set screws to the correct the correct torque.

  • Page 15: Mechanical Installation

    8. Mechanical installation Horizontal installation • Pumps fitted with motors up to and including 4 kW require a 0.3 m clearance behind the motor. 8.1 Pump location • Pumps fitted with motors of 5.5 kW and up The pump must be sited in a well-ventilated, but require a 0.3 m clearance behind the motor and frost-free location.

  • Page 16: Installation Positions

    8.2 Installation positions Arrows on the pump housing show the direction of flow of liquid through the pump. The pumps can be installed with the motor/pump shaft in all positions between vertical and horizontal, but the motor must never fall below the horizontal plane.

  • Page 17: Foundation Of Nb, Nbg Pump With Base Frame

    8.4 Foundation of NB, NBG pump with base frame This section applies only to 50 Hz pumps Note as base frames are not supplied for 60 Hz pumps. We recommend that you install the pump on a plane and rigid concrete foundation which is heavy enough to provide permanent support for the entire pump.
  • Page 18 1: Preparing the foundation We recommend the following procedure to ensure a good foundation. Illustration Step Action Use an approved, non-shrinking concrete. Contact your concrete supplier for advice if any doubts. Pour the foundation without interruptions to within 19-32 mm of the final level. Use vibrators to ensure that the concrete is evenly distributed.
  • Page 19 3: Grouting Grouting compensates for an uneven foundation, distributes the weight of the unit, dampens vibrations and prevents shifting. Use an approved, non- shrinking grout. If you have questions or doubts about the grouting, please contact an expert on grouting. Illustration Step Action...

  • Page 20: Pipework

    8.5 Pipework 8.5.2 Direct mounting in pipes Pumps fitted with motors up to and including frame 8.5.1 Piping size 132 are suitable for direct mounting in When installing the pipes, make sure that the pump supported pipes. housing is not stressed by the pipes. The inlet and outlet pipes must be of an adequate size, taking the pump inlet pressure into account.

  • Page 21: Vibration Damping

    8.6 Vibration damping 8.7 Expansion joints Expansion joints provide these advantages: 8.6.1 Elimination of noise and vibrations • absorption of thermal expansion and contraction In order to achieve optimum operation and minimum of pipes caused by variations in liquid noise and vibration, consider vibration damping of temperature the pump.

  • Page 22: Measuring Instruments

    8.8 Measuring instruments 8.8.1 Pressure gauge and mano-vacuum gauge To ensure continuous monitoring of the operation, we recommend that you install a pressure gauge on the outlet side and a mano-vacuum gauge on the inlet side. Open the pressure gauge tappings only for test purposes.

  • Page 23: Flange Forces And Torques

    9. Flange forces and torques Flange forces and torques Fig. 23 Force [N] Torque [Nm] Grey cast iron Diameter DN ΣF* ΣM* 1155 1383 Horizontal pump, z- 1173 1050 1838 axis, outlet port 1120 1383 1243 2170 1068 1418 1750 1575 2748 1278...
  • Page 24 1855 2275 3360 ΣF and ΣM are the vector sums of the forces and torques. If not all loads reach the maximum permissible value, one of the values is allowed to exceed the normal limit. Contact Grundfos for further information.

  • Page 25: Electrical Connection

    Cable length All three-phase Grundfos MG and MMG motors of 3 The length of the cable between kW and up incorporate a thermistor. See the motor and frequency converter instructions in the motor terminal box.

  • Page 26: Startup

    11. Startup Suction operation with non-return valve The inlet pipe and the pump must be filled with liquid and vented before the pump is started. Do not start the pump until it has been Caution 1. Close the isolating valve in the outlet pipe and filled with liquid and vented.

  • Page 27: Starting Up The Pump

    11.4 Starting up the pump 11.5 Shaft seal run-in period 1. Open the isolating valve on the inlet side of the The seal faces are lubricated by the pumped liquid, pump completely and leave the isolating valve on meaning that there may be a certain amount of the outlet side almost closed.

  • Page 28: Maintenance

    Motors larger than frame size 132 must be greased be classified as contaminated. according to the indications on the motor nameplate. If you request Grundfos to service such a pump, Grease spills from the motor may occur. contact Grundfos with details about the pumped Grease specifications: See section 12.4.1 Bearing...

  • Page 29: Sound Pressure Level

    15.2 Sound pressure level The data in this table applies for pumps including motor, (MG, MMG, Siemens and TECO motors). The values stated are maximum sound pressure levels. Tolerances are according to ISO 4871. 50 Hz 60 Hz 2-pole: n = 2900 min 2-pole: n = 3500 min 4-pole: n = 1450 min 4-pole: n = 1750 min...

  • Page 30: Fault Finding

    16. Fault finding Warning Before removing the terminal box cover and before removing/dismantling the pump, make sure that the power supply has been switched off and that it cannot be accidentally switched on again. Fault Cause Remedy Pump delivers Wrong electrical connection, for Check the electrical connection and remedy, no or too little instance two phases.

  • Page 31: Disposal

    This product or parts of it must be disposed of in an environmentally sound way: 1. Use the public or private waste collection service. 2. If this is not possible, contact the nearest Grundfos company or service workshop. Subject to alterations.
  • Page 32 Argentina China Hong Kong Bombas GRUNDFOS de Argentina S.A. GRUNDFOS Pumps (Shanghai) Co. Ltd. GRUNDFOS Pumps (Hong Kong) Ltd. Ruta Panamericana km. 37.500 Centro 10F The Hub, No. 33 Suhong Road Unit 1, Ground floor Industrial Garin Minhang District Siu Wai Industrial Centre 1619 Garín Pcia.
  • Page 33 Malaysia Serbia Turkey GRUNDFOS Pumps Sdn. Bhd. Grundfos Srbija d.o.o. GRUNDFOS POMPA San. ve Tic. Ltd. 7 Jalan Peguam U1/25 Omladinskih brigada 90b Sti. Glenmarie Industrial Park 11070 Novi Beograd Gebze Organize Sanayi Bölgesi 40150 Shah Alam Phone: +381 11 2258 740...
  • Page 34 96483177 0716 ECM: 1189747 www.grundfos.com...

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Nbg series

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