Grundfos NBG Series Installation And Operating Instructions Manual
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Grundfos NBG 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 NBG 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 Page 12.3 Motor 12.4 Lubrication Symbols used in this document Periods of inactivity and frost General information protection Delivery and handling Service Delivery 14.1 Service kits...

  • Page 3: Delivery And Handling

    The pumps are tested 100 % before leaving the factory. 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 Handling Weight: See label on the packing. Warning...

  • Page 4: Identification

    4. Identification 4.1 Nameplate Type 0.70 68.8 DK-8850 Bjerringbro, Denmark NB 32-125.1/142 AE-F-1-A-E-S-BAQE B 96126252 P2 0612 0001 Model 23.4 m /h 22.6 2900 16/120 bar/°C Made in Hungary Fig. 5 Example of nameplate for NB Legend Pos. Description Type designation Model Flow rate Max.

  • Page 5: Type Key

    4.2 Type key Model B Example 1 (pump design according to EN 733) -125 .1 /142 AE F S BAQE Example 2 (pump design according to ISO 2858) NBG 125 -100 -160 /160-142 A S DQQK Type range Nominal diameter of suction port (DN) Nominal diameter of discharge port (DN) Nominal impeller diameter [mm] Reduced performance = .1...
  • Page 6 Example 1 (pump design according to EN 733) -125 .1 /142 AE F S BAQE Example 2 (pump design according to ISO 2858) NBG 125 -100 -160 /160-142 A S DQQK 1.4408 1.4408 1.4517 1.4401 1.4517 1.4517 1.4517 1.4462 M 1.4408 1.4517 1.4517 1.4401...

  • Page 7: Applications

    6. Operating conditions 4.2.1 Letter codes for shaft seals Example: 10 = BAQE B A Q E 6.1 Ambient temperature and altitude The ambient temperature and the installation altitude Shaft seal type are important factors for the motor life as they affect A O-ring seal with fixed driver the life of the bearings and the insulation system.

  • Page 8: Max. Operating Pressure

    The minimum and maximum flow rates can be read pressure above atmospheric pressure either from the performance curve pages in the relevant data booklets or from a curve for a specific pump when selecting it in Grundfos Product Center. Pump pressure Inlet pressure Fig. 7...

  • Page 9: Shaft Seals

    6.8 Shaft seals The operating range of the seals is described for two main applications: pumping of water or pumping of coolants. Seals with a temperature range of 0 °C and up are mainly used for pumping water, while seals for temperatures below 0 °C are mainly intended for coolants.

  • Page 10: Pump Without Motor

    7. Pump without motor 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. 1. Remove the coupling guard and loosen the 2.
  • Page 11 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 12: 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 13 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 14: Mechanical Installation

    8. Mechanical installation Vertical installation • Pumps fitted with motors up to and including 4 8.1 Preparations before installation kW require a 0.3 m clearance above the motor. • Pumps fitted with motors of 5.5 kW and up The contractor must inspect the equipment on require at least a 1 metre clearance above the delivery and make sure that it is stored in such a way motor to allow the use of lifting equipment.

  • Page 15: Connection

    8.3 Connection 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 16: Foundation Of Nb, Nbg Pump With Base Frame

    8.5 Foundation of NB, NBG pump with base frame This section applies only to 50 Hz pumps 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 17 1: Preparing the foundation We recommend the following procedure to ensure a good foundation. Step Illustration 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 18 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. Step Illustration Action...

  • Page 19: Pipework

    8.6 Pipework 8.6.2 Direct mounting in pipework Pumps fitted with motors up to and including frame 8.6.1 Piping size 132 are suitable for direct mounting in When installing the pipes, make sure that the pump supported pipework. housing is not stressed by the pipework. The suction and discharge pipes must be of an adequate size, taking the pump inlet pressure into account.

  • Page 20: Vibration Dampening

    8.7 Vibration dampening 8.8 Expansion joints Expansion joints provide these advantages: 8.7.1 Elimination of noise and vibrations • absorption of thermal expansion and contraction In order to achieve optimum operation and minimum of pipework caused by variations in liquid noise and vibration, consider vibration dampening of temperature the pump.

  • Page 21: Measuring Instruments

    8.9 Measuring instruments 8.9.1 Pressure gauge and mano-vacuum gauge To ensure continuous monitoring of the operation, we recommend installing a pressure gauge (on the discharge side) and a mano-vacuum gauge (on the suction side). The pressure gauge taps should only be opened for test purposes.

  • Page 22: Flange Forces And Torques

    9. Flange forces and torques Fig. 23 Flange forces and torques Force [N] Torque [Nm] Diameter Grey cast iron ΣF * ΣM * 1155 Horizontal 1383 pump, 1173 1050 1838 z-axis, 1120 1383 1243 2170 1068 discharge port 1418 1750 1575 2748 1278...
  • Page 23 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 24: Electrical Connection

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

  • Page 25: Commissioning And Startup

    11. Commissioning and startup Open systems where the liquid level is below the pump inlet Do not start the pump until it has been 1. If an isolating valve is fitted on the suction side of Note filled with liquid and vented. the pump, the valve must be fully open.

  • Page 26: Startup

    11.5 Startup 11.7 Start/stop Before starting the pump, completely open the isolating valve on the suction side of the pump and Max. number of starts/hour leave the isolating valve on the discharge side almost closed. Frame size Number of poles Start the pump.

  • Page 27: Maintenance

    If the pump is installed in a dusty If Grundfos is requested to service such a pump, environment, it must he cleaned and checked Grundfos must be contacted with details about the regularly.

  • Page 28: 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 no Wrong electrical connection Check the electrical connection and remedy, if or too little liquid.

  • Page 29: Disposal

    17. 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.
  • Page 30 Appendix Sound pressure levels 60 Hz The data in this table applies for pump including 2-pole: n = 3500 min motor, (MG, MMG, Siemens and TECO motors). 4-pole: n = 1750 min The values stated are maximum sound pressure 6-pole: n = 1170 min levels.

  • Page 31: Declaration Of Conformity

    Standard used: EN 809:1998 + A1:2009. – Ecodesign Directive (2009/125/EC). Electric motors: Commission Regulation No. 640/2009. Applies only to three-phase Grundfos motors marked IE2 or IE3. See the motor nameplate. Standard used: EN 60034-30:2009. – Ecodesign Directive (2009/125/EC). Water pumps: Commission Regulation No.
  • 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 96658389 0818 ECM: 1240712 www.grundfos.com...

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