Xylem Flygt 2620.172 Service And Repair Instructions
  1. Manuals
  2. Brands
  3. Xylem Manuals
  4. Water Pump
  5. Flygt 2620.172
  6. Service and repair instructions

Xylem Flygt 2620.172 Service And Repair Instructions

Hide thumbs
Table of Contents

Advertisement

Quick Links

Service and Repair Instructions
885611_2.0
2620.172/.281

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the Flygt 2620.172 and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Xylem Flygt 2620.172

Summary of Contents for Xylem Flygt 2620.172

  • Page 1 Service and Repair Instructions 885611_2.0 2620.172/.281...

  • Page 3: Table Of Contents

    Table of Contents Table of Contents 1 Introduction and Safety......................3 1.1 Introduction.......................... 3 1.2 Safety terminology and symbols..................3 1.3 User safety..........................4 1.4 Special hazards........................4 1.4.1 Working in temporary installations................4 1.4.2 Biological hazards......................4 1.4.3 Wash the skin and eyes....................5 1.5 Protecting the environment....................5 1.6 End of life product disposal....................5 1.7 Spare parts..........................6 1.8 Warranty..........................
  • Page 4 Table of Contents 4.6 Assemble the pump......................40 4.6.1 Assembly overview..................... 40 4.6.2 Install the stator......................41 4.6.3 Install the pump top: Standard version only............42 4.6.4 Install the bearings: Standard version only............. 48 4.6.5 Install the shaft unit.....................49 4.6.6 Install the mechanical seal: Standard versions only..........50 4.6.7 Check the seal tightness....................

  • Page 5: Introduction And Safety

    This includes any modification to the equipment or use of parts not provided by Xylem. If there is a question regarding the intended use of the equipment, please contact a Xylem representative before proceeding.

  • Page 6: User Safety

    1 Introduction and Safety Special symbols Some hazard categories have specific symbols, as shown in the following table. Electrical hazard Magnetic fields hazard Electrical Hazard: CAUTION: 1.3 User safety All regulations, codes, and health and safety directives must be observed. The site •...

  • Page 7: Wash The Skin And Eyes

    • Clean-up of spills Exceptional sites CAUTION: Radiation Hazard Do NOT send the product to Xylem if it has been exposed to nuclear radiation, unless Xylem has been informed and appropriate actions have been agreed upon. 1.6 End of life product disposal Handle and dispose of all waste in compliance with local laws and regulations.

  • Page 8: Spare Parts

    1 Introduction and Safety 1.7 Spare parts CAUTION: Only use the manufacturer’s original spare parts to replace any worn or faulty components. The use of unsuitable spare parts may cause malfunctions, damage, and injuries as well as void the warranty. 1.8 Warranty For information about warranty, see the sales contract.

  • Page 9: Product Description

    2 Product Description 2 Product Description 2.1 Products included Pump model Standard MSHA Drainage Sludge 2620.172 2620.281 2.2 Pump design The pump is submersible, and driven by an electric motor. Intended use The product is intended for moving waste water, sludge, raw and clean water. Always follow the limits given in Technical Reference on page 65.

  • Page 10: Monitoring Equipment

    2 Product Description Version code 281: D Sludge 2.3 Monitoring equipment The following applies to the monitoring equipment of the pump: • The stator incorporates thermal contacts connected in series that activate the alarm at overtemperature. • The thermal contacts open at 125°C (257°F) and close at 95°C (203°F). •...

  • Page 11: Product Denomination

    2 Product Description 1. Curve code or Propeller code 2. Serial number 3. Product number 4. Country of origin 5. Additional information 6. Phase; type of current; frequency 7. Rated voltage 8. Thermal protection 9. Thermal class 10.Rated shaft power 11.International standard 12.Degree of protection 13.Rated current...
  • Page 12 2 Product Description Type of Callout Number Indication Parameter Hydraulic end Type of installation Sales code Version Production year Production cycle Running number 2620.172/.281 Service and Repair Instructions...

  • Page 13: Installation

    3 Installation 3 Installation 3.1 Hazardous atmospheres DANGER: Explosion/Fire Hazard Special rules apply to installations in explosive or flammable atmospheres. Do not install the product or any auxiliary equipment in an explosive zone unless it is rated explosion- proof or intrinsically-safe. If the product is rated explosion-proof or intrinsically-safe, then see the specific explosion-proof information in the safety chapter before taking any further actions.

  • Page 14: Grounding (Earthing)

    3 Installation • if the pump will be connected to the public mains, then the supply authority must be notified before installing the pump. When the pump is connected to the public power supply, it can cause flickering of incandescent lamps when started. •...

  • Page 15: Product-Specific Precautions

    3 Installation WARNING: Electrical Hazard Risk of electrical shock or burn. You must connect an additional ground- (earth-) fault protection device to the grounded (earthed) connectors if persons are likely to come into contact with liquids that are also in contact with the pump or pumped liquid. Ground (earth) conductor length The ground (earth) conductor must be longer than the phase conductors in the junction box of the unit.

  • Page 16: Connect The Motor Cable To The Pump

    3 Installation Figure 3: Aluminum foil on control element. b) Put a white shrink hose over the drain wire and the cable terminal. c) Fit a cable lug on the drain wire. d) Twist T1+T2 and T3+T4. e) Put a shrink hose over the control element. Make sure that the conductive aluminum foil and drain wire is covered.

  • Page 17: Cable Charts

    3 Installation DANGER: Explosion/Fire Hazard Special rules apply to installations in explosive or flammable atmospheres. Do not install the product or any auxiliary equipment in an explosive zone unless it is rated explosion- proof or intrinsically-safe. If the product is rated explosion-proof or intrinsically-safe, then see the specific explosion-proof information in the safety chapter before taking any further actions.
  • Page 18 3 Installation Code Description Orange Green GNYE Green-Yellow Grey Blue Yellow Terminal plate markings, 1–phase Marking Description Auxiliary winding Common Main winding 2620.172/.281 Service and Repair Instructions...
  • Page 19 3 Installation Stator leads and thermal contacts connection to the terminal plate Terminal plate 2610.160 2610.172 2620.172 2620.281 773 45 02 STATOR LEADS AND THERMAL CONTACTS 1-PHASE STATOR LEADS 1-ph serial U1,Z5 Terminal 9 leads plate 4 leads 8 leads 8 leads Terminal plate W / A...
  • Page 20 3 Installation Motor cable and starter unit connection to the terminal plate SYMBOLS AND DENOMINATIONS Terminal plate BN=Brown =Terminal plate BK=Black =Screen 2610.160 WH=White =Ground OG=Orange 2610.172 GN=Green =Functional ground 2620.172 GNYE=Green-Yellow =Crimp isolation for RD=Red 2620.281 cable, if not in use GY=Grey =Socket - Plug BU=Blue...

  • Page 21: Check The Impeller Rotation

    3 Installation 3.3 Check the impeller rotation CAUTION: Crush Hazard The starting jerk can be powerful. Make sure nobody is close to the unit when it is started. Check the direction of rotation each time the cable has been re-connected and after phase or total supply failure.

  • Page 22: Maintenance

    4 Maintenance 4 Maintenance 4.1 Precautions Before starting work, make sure that the safety instructions in the chapter Introduction and Safety on page 3 have been read and understood. DANGER: Crush Hazard Moving parts can entangle or crush. Always disconnect and lock out power before servicing to prevent unexpected startup.

  • Page 23: The Fault-Tracing Process

    4 Maintenance Figure 5: Example of O-ring adjacent surfaces During the reassembly, always make sure that existing index markings are in line. The reassembled drive unit must always be insulation-tested and the reassembled pump must always be test-run before normal operation. 4.2 The fault-tracing process 4.2.1 Trace faults in the drive Check the stator.

  • Page 24: Trace Faults In The Wet End

    4 Maintenance Parameter Measurement — ground — ground — ground — V — W — W 2. With an ohm meter, check that R — R are reasonably uniform. Parameter Measurement — U — V — W 3. Use the following flowchart to determine the action needed. Insulation test →...

  • Page 25: Change The Oil

    4 Maintenance If there is a question regarding the tightening torques, then contact a sales or authorized service representative. Screws and nuts Table 1: Stainless steel, A2 and A4, torque Nm (ft-lbs) Property class 1.0 (0.74) 2.0 (1.5) 3.0 (2.2) 8.0 (5.9) 15 (11) 27 (20)
  • Page 26 4 Maintenance CAUTION: Compressed Gas Hazard Air inside the chamber may cause parts or liquid to be propelled with force. Be careful when opening. Allow the chamber to de-pressurize before removal of the plug. 3. Turn the pump so that the oil hole faces downwards and let the oil run out into a container.

  • Page 27: Disassemble The Pump

    4 Maintenance Fill with oil 1. Replace the oil screw O-ring. 2. Turn the pump so that the oil hole faces upwards and fill with new oil. Fill until the oil level reaches the inlet hole. Pump Oil Quantity, L (qt) 2620.172 0.44 (0.46) 2620.281...

  • Page 28: Remove The Discharge Connection: Drainage Version Only

    4 Maintenance Complete dismantling to access the stator The following flowchart shows the general workflow for a complete dismantling in order to access the stator. Handle Cover → Electrical connections → Cable entry → ↓ Strainer Cooling jacket Terminals ← ←...

  • Page 29: Remove The Impeller: Drainage Version

    4 Maintenance 4.5.4 Remove the impeller: Drainage version CAUTION: Cutting Hazard Worn parts can have sharp edges. Wear protective clothing. 1. Remove the strainer. 2. Loosen the impeller: a) Lock the impeller to prevent rotation. Use pliers, a screwdriver, or similar. b) Remove the impeller screw and the washer.
  • Page 30 4 Maintenance 3. Remove the diffuser. 4. Remove the impeller: a) Lock the impeller to prevent rotation. Use pliers, a screwdriver, or similar. b) Turn the adjustment screw counterclockwise until the impeller loosens from the shaft. Use an 8 mm hexagon bit adapter (Allen socket). c) Pull off the impeller.

  • Page 31: Remove The Impeller: Sludge Version

    4 Maintenance 4.5.5 Remove the impeller: Sludge version CAUTION: Cutting Hazard Worn parts can have sharp edges. Wear protective clothing. 1. Remove the stand and the lower pump housing. 2. Loosen the impeller: a) Lock the impeller to prevent rotation. Use pliers, a screwdriver, or similar.

  • Page 32: Remove The Mechanical Seal

    4 Maintenance 3. Remove the impeller: a) Lock the impeller to prevent rotation. Use pliers, a screwdriver, or similar. b) Turn the adjustment screw counterclockwise until the impeller breaks free from the shaft. Use an 8 mm hexagon bit adapter (Allen socket) with a 100 mm (4 in.) extension. c) Pull off the impeller.

  • Page 33: Remove The Shaft Unit

    4 Maintenance b) Pry off the seal housing cover. Use a screwdriver in the gaps between the seal housing and the lower intermediate piece. 2. Remove the remaining oil from inside the intermediate piece. Use a syringe. 3. Remove the mechanical seal. Use a screwdriver on each side to pry the mechanical seal off the shaft.
  • Page 34 4 Maintenance 2. Reinstall the diffuser. Tighten the screws evenly until the intermediate piece is released from the outer casing. 3. Remove the diffuser. 4. Remove the screws for the seal housing cover. 5. Lift straight up and remove the intermediate piece and rotor shaft. 6.

  • Page 35: Remove The Bearings

    4 Maintenance 7. Remove the o-ring from the stator housing unit: a) Put the stator housing unit on the work bench. b) Remove the o-ring from the groove. Use stiff wires. 4.5.8 Remove the bearings 1. Remove the small retaining ring. 2.

  • Page 36: Remove The Pump Top: Standard Version Only

    4 Maintenance NOTICE: Only use a puller with three claws. Otherwise, the intermediate piece can be damaged. For more information about the tool, see Tools on page 68. 3. Remove the large retaining ring. Use pliers. 4. Remove the main bearing from the intermediate piece. Use a press or the dismantling tool and make sure that the intermediate piece is evenly supported during the removal of the main bearing.
  • Page 37 4 Maintenance a) Remove the screws. b) Lift off the handle. 3. Remove the cover from the pump top: a) Remove the screws from the cover. b) Remove the screws and washers from the entrance flange. 2620.172/.281 Service and Repair Instructions...
  • Page 38 4 Maintenance c) Pry the entrance flange from the cover with a screwdriver. d) Remove the cover and the cable entrance from the pump top, as far as the slack of the cable allows. e) Disconnect the power leads. f) Disconnect the ground (earth) lead. 2620.172/.281 Service and Repair Instructions...
  • Page 39 4 Maintenance g) Remove the cover and cable from the pump top. 4. Remove the screws for the thermal protector and starter unit. 5. Remove the starter unit, as far as the slack of the cables allows. 6. Disconnect the cables between the starter unit and the terminal plate unit. 2620.172/.281 Service and Repair Instructions...
  • Page 40 4 Maintenance 7. Remove the pump top. a) Remove the screws. b) Remove the pump top. 2620.172/.281 Service and Repair Instructions...

  • Page 41: Remove The Stator

    4 Maintenance 4.5.10 Remove the stator 1. Remove the terminal plate unit, as far as the slack of the cables allows. 2. Install a lifting eye bolt in the stator housing. 3. Remove the terminal plate unit: a) Disconnect the stator leads from the terminal plate unit. 2620.172/.281 Service and Repair Instructions...

  • Page 42: Assemble The Pump

    4 Maintenance Use a screwdriver. b) Remove the terminal plate unit. Position the stator leads downwards in the stator. 4. Lift the stator housing. Use the lifting eye bolt. 5. Place a protective material underneath to prevent the stator from breaking when released.

  • Page 43: Install The Stator

    4 Maintenance Shaft unit ↓ Seals ↓ Impeller ↓ Discharge connection or cover 4.6.2 Install the stator 1. Place the stator on a support no wider than the stator. Position the stator leads downwards in the stator. 2. Heat the stator housing to maximum 150°C (302°F). 3.

  • Page 44: Install The Pump Top: Standard Version Only

    4 Maintenance 9. Remove the lifting eye bolt. 10.Install the terminal plate unit and O-ring on top of the stator. 4.6.3 Install the pump top: Standard version only 1. Install a new O-ring on top of the stator housing. Lubricate the O-ring. 2620.172/.281 Service and Repair Instructions...
  • Page 45 4 Maintenance 2. Install the air release valve. Install it from the inside of the pump top and use pliers to pull it through the hole. 3. Install the pump top: a) Guide the cables from the terminal plate unit through the pump top opening. b) Install and tighten the screws.
  • Page 46 4 Maintenance 4. Connect the starter unit to the terminal plate unit. For more information, see Make the electrical connections on page 11. 5. Install the starter unit in the pump top. Install and tighten the screws for the starter unit and the thermal protector.
  • Page 47 4 Maintenance a) Install a new gasket in the cover. Lubricate the gasket. b) Guide the power cable through the hole in the cover. Make sure that all parts of the cable entrance are in position. 1. Washer 2. Seal sleeve 3.
  • Page 48 4 Maintenance The ground (earth) conductor must be longer than the phase conductors in the junction box of the unit. The table shows how much longer, than the phase conductors, the ground (earth) conductor must be. Pump Extra length of ground conductor, mm (in.) 2620.172 270 (10.6) 2620.281...
  • Page 49 4 Maintenance Install the cable so that a few centimeters of the outer sheathing is inside the cable entrance. 7. Install the handle. Tighten the screws. 8. Install a new O-ring on the edge of the pump top. Lubricate the O-ring. 9.

  • Page 50: Install The Bearings: Standard Version Only

    4 Maintenance 4.6.4 Install the bearings: Standard version only 1. Inner retaining ring 2. Main bearing 3. Small retaining ring 4. Intermediate piece 5. Shaft unit 6. Support bearing 1. Put the intermediate piece on the work bench. 2. Install the main bearing in the intermediate piece. Use a rubber mallet, and the SKF B20-52 fitting tool or a tube with the diameters: –...

  • Page 51: Install The Shaft Unit

    4 Maintenance Use a rubber mallet, and the SKF A12-37 fitting tool or a tube with the diameters: – ID = 12 mm (0.47 in) – OD = 19 mm (0.75 in) 4.6.5 Install the shaft unit 1. Install new O-rings on the intermediate piece. Lubricate the O-rings.

  • Page 52: Install The Mechanical Seal: Standard Versions Only

    4 Maintenance To facilitate the mounting, use a screwdriver. b) Pull the shaft-rotor unit against the spring. 5. Secure the alignment: a) Take one of the screws for the seal housing cover. b) Drop the screw into one of the assembly holes. Do not install the screw.

  • Page 53: Check The Seal Tightness

    4 Maintenance 4. Install the seal housing cover: a) Install and lubricate the O-rings. b) Install and tighten the screws. 4.6.7 Check the seal tightness After mounting a new seal, check that it is tight. Leakage can be detected by applying a vacuum in the seal housing, and monitoring any change of pressure over time.

  • Page 54: Install The Impeller: Drainage Version

    4 Maintenance = 0.017 ΔP = maximum allowed pressure change in the test object = differential pressure (bar) t = test time (minutes) V = the volume of the oil chamber, usually 1.2 × oil volume (liter) WARNING: Compressed Gas Hazard Compressed air/gas may cause parts to be propelled with force.
  • Page 55 4 Maintenance 3. Grease the threads of the impeller screw and the washer. The proper lubrication of the screw and washer is lubricating grease for assembly of bolts etc., for example, Kluber ALTEMP Q NB 50 or equivalent. 4. Check that the impeller screw is clean and easy to screw into the shaft end. This is to prevent the shaft from rotating with the impeller screw.
  • Page 56 4 Maintenance Use an 8 mm hexagon bit adapter (Allen socket) with a 100 mm (4 in) extension. 9. Fasten the impeller: a) Place the washer on the impeller screw. b) Lock the impeller to prevent rotation. Use pliers, a screwdriver, or similar. c) Tighten the impeller screw.

  • Page 57: Install The Impeller: Sludge Version

    4 Maintenance 4.6.9 Install the impeller: Sludge version 1. Prepare the shaft: a) Polish off any flaws with a fine emery cloth. The end of the shaft must be clean and free from burrs. b) Coat the inner conic, the outer cylindrical surfaces, and the thread of the conical sleeve with a thin layer of grease.
  • Page 58 4 Maintenance 3. Grease the threads of the screw and the washer. The proper lubrication of the screw and washer is lubricating grease for assembly of bolts etc., for example, Kluber ALTEMP Q NB 50 or equivalent. 4. Check that the impeller screw is clean and easy to screw into the shaft end. This is to prevent the shaft from rotating with the impeller screw.

  • Page 59: Install The Discharge Connection: Drainage Version Only

    4 Maintenance 8. Mount the O-ring, the pump housing, and stand. 4.6.10 Install the discharge connection: Drainage version only 1. Fit a new O-ring in the discharge connection. 2. Install the discharge connection. 2620.172/.281 Service and Repair Instructions...

  • Page 60: Install The Cover: Sludge Version Only

    4 Maintenance 4.6.11 Install the cover: Sludge version only 1. Place the pump in its upright position. 2. Fit new a greased O-ring on the cover. 3. Fit the cover. 4.7 Service Regular inspection and service of the pump ensures more reliable operation. Type of Purpose Inspection interval...

  • Page 61: Inspection

    4 Maintenance Type of Purpose Inspection interval service Overhaul To secure a long operating lifetime for the product. It 4,000 hours or 2 years, whichever comes includes replacement of key components and the first. These intervals apply to normal measures taken during an inspection. applications and operating conditions at media (liquid) temperatures <...

  • Page 62: Overhaul

    4 Maintenance Service item Action Cable 1. If the outer jacket is damaged, then replace the cable. 2. Check that the cables do not have any sharp bends and are not pinched. Cooling system If the flow through the system has been partly restricted, then rinse and clean. Level sensors or 1.

  • Page 63: Troubleshooting

    5 Troubleshooting 5 Troubleshooting 5.1 Electrical troubleshooting DANGER: Electrical Hazard Troubleshooting a live control panel exposes personnel to hazardous voltages. Electrical troubleshooting must be done by a qualified electrician. Follow these guidelines when troubleshooting: • Disconnect and lock out the power supply except when conducting checks that require voltage.

  • Page 64: The Pump Does Not Stop When A Level Sensor Is Used

    5 Troubleshooting Cause Remedy The installation is not receiving Check that: voltage. • The main power switch is on. • There is control voltage to the start equipment. • The fuses are intact. • There is voltage in all phases of the supply line. •...

  • Page 65: The Pump Starts-Stops-Starts In Rapid Sequence

    5 Troubleshooting 5.4 The pump starts-stops-starts in rapid sequence Cause Remedy The pump starts due to back-flow Check that: which fills the sump to the start level • The distance between the start and stop levels is sufficient. again. • The non-return valve(s) work(s) properly. •...

  • Page 66: The Pump Delivers Too Little Or No Water

    5 Troubleshooting Cause Remedy The density of the pumped fluid is too Make sure that the maximum density is 1100 kg/m (9.2 lb/US gal) high. • Change the impeller, or • Change to a more suitable pump • Contact a sales or authorized service representative. The ambient temperature exceeds the The pump must not be used for such an application.

  • Page 67: Technical Reference

    6 Technical Reference 6 Technical Reference 6.1 Application limits Data Description Media (liquid) temperature Maximum 40°C (104°F) Standard version option, Warm media (liquid) version: Maximum temperature 70°C (158°F). Warm liquid has certain operational limitations, which are stated on a plate on the pump. pH of the pumped media (liquid) 5–8 Media (liquid) density...
  • Page 68 6 Technical Reference 3-phase, 50 Hz Motor type: • 2,800 rpm • 2.2 kW (3.0 hp) Voltage, V Rated current, A Starting current, A Power factor, cos φ 220 D 0.88 230 D 0.85 240 D 0.81 380 Y 0.89 400 Y 0.88 415 Y...

  • Page 69: Dimensions And Weights

    6 Technical Reference Voltage, V Rated current, A Starting current, A Power factor, cos φ 460 Y serial 0.83 480 Y 0.86 480 Y serial 0.78 575 Y 600 Y 0.88 6.4 Dimensions and weights All measurements in the illustration are in millimeters, if not otherwise specified. Figure 7: BS/KS, standard version 2620.172/.281 Service and Repair Instructions...

  • Page 70: Tools

    6 Technical Reference Figure 8: DS, standard version 6.5 Tools List of tools To avoid possible damages to the unit, make sure that you have the following special tools available before servicing the unit. Part number Denomination Range of use 841362 Puller Main bearing...

  • Page 71: Winding Data

    6 Technical Reference 6.6 Winding data Stator number 13–10–2B Table 3: 1-phase Part number Number of stator leads Winding resistance (Ohm) 6389601 1.77 3.66 6389603 1.34 2.71 Table 4: 3-phase Part number Number of stator leads Winding resistance (Ohm) 6389501 3.06 6389503 3.65...
  • Page 72 For more information on how Xylem can help you, go to www.xylem.com Xylem Water Solutions Global Visit our Web site for the latest version of this document...

This manual is also suitable for:

Flygt 2620.281

Table of Contents

Save PDF