Service instructions. MS6 3.7 kw - 30 kw. 50/60 Hz 3~

Transcription

1 Service instructions MS6 3.7 kw - 30 kw 50/60 Hz 3~ 1. Symbols used in this document Identification Nameplate Frequency converter operation Product number key Type key Tightening torques and lubricants Service tools Special tools Standard tools Torque tools General information Position numbers Before dismantling Before assembly During assembly Inspection Dismantling and assembly kw / 5-12 hp kw / 5-40 hp Maintenance and service Fault finding Checking the motor and cable Measuring the insulation resistance Winding resistances MS6T MS6T Resistance values for cables Cable connection Drawings, model A kw / 5-12 hp kw / hp Drawings, model B kw / 5-12 hp kw / hp, model B GB 1 / 32

2 1. Symbols used in this document Warning If these safety instructions are not observed, it may result in personal injury! 2. Identification 2.1 Nameplate MS6REST30 Phase Voltage No Frequency P 2 Model: A SN: PC P10715 P 2 SF Max. SF. C. Cos n [-] [V] [Hz] [kw] [hp] [-] [A] [-] -1 [min ] Liquid t max. 30 C at 0.15 m/s /86 F at 0.5 ft/s Connection D Weight: 64 kg/141lb Duty S1 Transmitter temp. pmax. 60 bar kva code D IP 68 Ins.cl. F MADE IN HUNGARY C US TM Fig. 1 Nameplate Pos. Description Pos. Description 1 Model (A = first generation) 13 Service factor 2 Output power in [kw] and [hp] 14 Serial number 3 Product number - 78XXXXXX: Product without packaging 15 Cos φ 4 Type designation 16 Production code 5 Number of phases 17 Rated speed min -1 6 Supply voltage 18 Rated current 7 Frequency 19 Net weight in [kg] and [lb] 8 Maximum liquid temperature at minimum flow past the motor 20 Enclosure class 9 Motor designed for continuous operation (S1) 21 Insulation class 10 Built-in Tempcon temperature transmitter 22 Country of production 11 CE mark and approvals 23 Connection 12 Maximum operating pressure 24 Locked-rotor current in kva per hp 2.2 Frequency converter operation If the motor has been connected to a frequency converter, the temperature transmitter is damaged. Change the nameplate by striking through "Transmitter temp". The change must permanent so use for instance an engraving stylus. See fig. 2. MS6REST30 Phase Voltage No Frequency P 2 Model: A SN: PC P20639 P 2 SF Max. SF. C. Cos n [-] [V] [Hz] [kw] [hp] [-] [A] [-] -1 [min ] Liquid t max. 30 C at 0.15 m/s / F at 0.5 ft/s Connection D Weight: 78 kg/ lb Duty S1 Transmitter temp. pmax. 60 bar IP 68 Ins.cl. F MADE IN HUNGARY C US TM Fig. 2 Nameplate with change 2 / 30

3 2.3 Product number key Example Motor type 78: MS6 Supply voltage 09: 3 x 200 V, 50 Hz / 3 x V, 60 Hz 10: 3 x V, 50 Hz 19: 3 x V, 50 Hz 60: 3 x V, 50 Hz, SD 63: 3 x 400 V, 50 Hz / 3 x V, 60 Hz, SD 64: 3 x 400 V, 50 Hz / 3 x V 60 Hz, DOL/SD 69: 3 x V, 50 Hz, SD 28: 3 x V, 60 Hz 33: 3 x 380 V, 60 Hz 35: 3 x 400, 50 Hz / 3 x V, 60 Hz 39: 3 x V, 50 Hz / 3 x 575 V, 60 Hz 80: 3 x V, 60 Hz, SD 83: 3 x 380 V, 60 Hz, SD Standard versions 45 MS6T30, without Tempcon Materials: EN and NBR rubber Shaft seal: carbon/ceramic. Radial bearing: carbon/steel 50 MS6WT30, with Tempcon Materials: EN and NBR rubber Shaft seal: carbon/ceramic. Radial bearing: tungsten carbide/sic 51 MS6RESWT30, with Tempcon Materials: EN and FKM rubber Shaft seal: SiC/SiC. Radial bearing: tungsten carbide/sic 52 MS6EST30, with Tempcon Materials: EN and FKM rubber Shaft seal: SiC/SiC. Radial bearing: carbon/ceramic 55 MS6T30, with Tempcon Materials: EN and NBR rubber Shaft seal: carbon/ceramic. Radial bearing: carbon/ceramic 56 MS6REST30, with Tempcon Materials: EN and FKM rubber Shaft seal: SiC/SiC. Radial bearing: carbon/ceramic 58 MS6T60, with Tempcon Materials: EN and NBR rubber Shaft seal: carbon/ceramic. Radial bearing: carbon/ceramic 59 MS6REST60, with Tempcon Materials: EN and FKM Shaft seal: SiC/SiC. Radial bearing: carbon/ceramic 61 MS6RESWT60, with Tempcon Materials: EN and FKM rubber Shaft seal: SiC/SiC. Radial bearing: tungsten carbide/sic 86 MS6RESDT30, with Tempcon Materials: EN and FKM rubber, filled with demineralised water Shaft seal: SiC/SiC. Radial bearing: carbon/ceramic Output power 39: 3.7 kw, 5.0 hp 40: 4.0 kw, 5.5 hp 41: 5.5 kw, 7.5 hp 42: 7.5 kw, 10 hp 43: 9.2 kw, 12 hp 44: 11 kw, 15 hp 45: 13 kw, 18 hp 46: 15 kw, 20 hp 47: 18.5 kw, 25 hp 48: 22 kw, 30 hp 49: 26 kw, 35 hp 50: 30 kw, 40 hp 3 / 30

4 2.4 Type key - Example MS 6 R E S W D T60 Type range MS: Motor submersible Motor diameter [inch] Material Blank: stainless steel EN (AISI 304) R: stainless steel EN (AISI 904L) Rubber parts Blank: NBR E: FKM Shaft seal Blank: ceramic/carbon S: SiC/SiC Radial bearings Blank: carbon/stainless steel W: SiC/tungsten carbide Motor liquid Blank: SML-3 D: demineralised water Maximum liquid temperature T30: 86 F (30 C) T60: 140 F (60 C) 3. Tightening torques and lubricants Pos. Description Quantity Dimensions Torque [Nm] Lubricant 213 End cover Gardolube 215 Screw kw 1 M5 4 Screw kw 2 M b Nut (model A) 1 M Gardolube 219 Thrust bearing housing Gardolube 220a O-ring 1 24 x 2.0 mm - Rocol Sapphire Aqua-Sil 222 Valve 1 M b O-ring 1 11 x 2.0 mm - Rocol Sapphire Aqua-Sil 224 O-ring ( kw) x 3.0 mm - Rocol Sapphire Aqua-Sil O-ring (11-30 kw) x 3.0 mm - Rocol Sapphire Aqua-Sil 226 Shaft seal housing Gardolube 236 Bearing retainer, lower Gardolube 236a Screw 2 M O-ring 1 66 x 2.0 mm - Rocol Sapphire Aqua-Sil 248 Screw 2 M6 6 Rocol Sapphire Aqua-Sil: product number RM2924 (1 kg). Gardolube L6250: product number Note: To ensure correct assembly when using Gardolube L6250, the parts must be tightened when the lubricant is still wet. 4 / 30

5 4. Service tools A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 5 / 30

6 4.1 Special tools Pos. Description For pos. Further information Part number A Tool for bearing retainer B Tool for end cover C Strap wrench " SV0853 D Tool for shaft E Punch for shaft seal 226b V F Jaws 201 SV7900 G Shaft height gauge 201, 202 6" SV0115 H Filling syringe 201 SV8000 I Tool for thrust bearing (model A) 216b J Tool for thrust bearing (model B) K Punch for thrust bearing (model B) Standard tools Pos. Description For pos. Further information Part number L Hexagon socket 226, W, Y 1/2" M Screwdriver 226b SV0804 N Angle screwdriver x 5.5 V , 236a 3 mm SV0153 O Tee key mm SV mm SV0050 P Rubber mallet 207 SV0349 Q Puller Torque tools Pos. Description For pos. Further information Part number R Torque wrench 213, 216b, 219, 226, 236, 222, A, B, W, Y, W Nm SV0500 S Torque wrench 236a, T 9 x 12 mm SV0292 T Ratchet insert tool 222, 236a, U, Z 9 x 12 SV0295 U Hexagon head driver 236a M6-5 mm SV M10-8 mm SV0298 V Torque screwdriver 215, X 1-6 Nm SV0435 W Impact socket mm, 3/4" X Hexagon bit 215 HX-4 V Y Hexagon socket 216b 4 mm x 25 mm, 1/4" SV0424 Z Adapter W 3/4" - 1/2" / 30

7 5. General information 5.1 Position numbers Position numbers of motor parts (digits) refer to exploded views and parts lists in section 12. Drawings, model A and 13. Drawings, model B; position numbers of service tools (letters) refer to section 4. Service tools. 5.2 Before dismantling Switch off the power supply to the motor. Disconnect the power supply cable in accordance with local regulations. 5.3 Before assembly Clean and check all parts. Replace defective parts by new parts. Order the necessary service kits. Always replace gaskets and O-rings when the motor is serviced. 5.4 During assembly Lubricate and tighten screws and nuts to the correct torque. See section 3. Tightening torques and lubricants. 7 / 30

8 6. Inspection 1. Check the cable and the electric parts. See section 10. Checking the motor and cable. 2. Check that the holes in end cover (pos. 213) are not clogged. 3. Check that shaft with rotor (pos. 202) rotates freely and noiselessly. 4. Remove sand shield (pos. 229). 5. Check the distance between rotor shaft end (pos. 202) and stator housing (pos. 201) using a shaft height gauge (pos. G). 6. Remove shaft seal housing (pos. 226). 7. Check if stationary shaft seal part (pos. 226a) is worn or damaged. Replace, if necessary. 8. Pull off rotating shaft seal part (pos. 226b) using two screwdrivers. 9. Check the spring action of rotating shaft seal part (pos. 226b). 10.Model B: Remove washer (pos. 153a). 11. Pull out upper bearing retainer (pos. 205) using an angle screwdriver (pos. N) or a similar tool. 12.Check the bearing surfaces of upper bearing retainer (pos. 205). 13.Check that stator housing (pos. 201) is filled with motor liquid. Refill, if necessary. 14.Turn shaft with rotor (pos. 202) to let air escape ( kw) kw: Move shaft with rotor (pos. 202) up and down in stator housing (pos. 201) to let air escape. 16.Fit upper bearing retainer (pos. 205) on shaft with rotor (pos. 202). Check that it is in the correct position. 17.Lubricate rotor shaft end (pos. 202) and rotating shaft seal part (pos. 226b) with motor liquid. 18.Fit rotating shaft seal part (pos. 226b) on shaft with rotor (pos. 202) using a soft punch (pos. E). 19.Lubricate the thread of shaft seal hosing (pos. 226). Tighten shaft seal housing (pos. 226). See section 3. Tightening torques and lubricants. 20.Push sand shield (pos. 229) onto shaft with rotor (pos. 202). 21.Check that the shaft rotates freely and noiselessly. 22.Remove valve (pos. 222). Fill the stator housing with liquid using a filling syringe (pos. H). Move shaft with rotor (pos. 202) up and down in stator housing (pos. 201) to let air escape. Repeat until the stator housing has been filled. 23.Fit and tighten valve (pos. 222). See section 3. Tightening torques and lubricants. 24.Tighten the two screws of motor cable (pos. 248), if necessary. See section 3. Tightening torques and lubricants. 8 / 30

9 7. Dismantling and assembly kw / 5-12 hp Dismantling the motor 1. Remove the two screws of motor cable (pos. 248). 2. Pull motor cable (pos. 220) out of stator housing (pos. 201) and check it for visible damage. 3. Remove sand shield (pos. 229). 4. Remove shaft seal housing (pos. 226). 5. Pull off rotating shaft seal part (pos. 226b) using two screwdrivers. 6. Model B: Remove washer (pos. 153a). 7. Check the spring action of rotating shaft seal part (pos. 226b). 8. Pull out upper bearing retainer (pos. 205) using an angle screwdriver (pos. N) or a similar tool. 9. Check the bearing surfaces of upper bearing retainer (pos. 205). 10.Tilt stator housing (pos. 201) and drain the motor liquid into a bucket. 11. Place the stator housing in a horizontal position and loosen end cover (pos. 213) with tool for end cover (pos. B). 12.Remove strainer (pos. 207). 13.Remove the two screws (pos. 236a) of lower bearing retainer (pos. 236). 14.Loosen lower bearing retainer (pos. 236) with tool for bearing retainer (pos. A) and remove it. 15.Check if the radial bearings in lower bearing retainer (pos. 236) are worn or damaged. 16.Pull out shaft with rotor (pos. 202) a little and remove stationary thrust bearing (pos. 203) from the rotor shaft. 17.Check if stationary thrust bearing (pos. 203) is worn or damaged. 18.Pull out shaft with rotor (pos. 202). Check if the rotor has dragged against the stator, and if the bearing surfaces of the rotor are worn. 19.Remove upthrust disc (pos. 242) from shaft with rotor (pos. 202). Check if it is worn or damaged. 20.Model A: Hold the rotor shaft with tool for thrust bearing (pos. D) and remove nut (pos. 216b). Remove nut (pos. 216b), rotating thrust ring (pos. 206) and thrust bearing support (208) from shaft with rotor (pos. 202). Check if they are worn or damaged. 21.Model B: Remove O-ring (pos. 216d) and thrust ring (pos. 206). Check thrust bearing support (pos. 208). 9 / 30

10 7.1.2 Assembling the motor Fitting the shaft with rotor 1. Model A: Lubricate the thread on the non-drive end of shaft with rotor (pos. 202). See section 3. Tightening torques and lubricants. 2. Model A: Fit thrust bearing support (pos. 208) and thrust ring (pos. 206) on shaft with rotor (pos. 202). See fig. 3. Model B: Fit conical thrust bearing support (pos. 208) using punch (pos. K). Fit thrust ring (pos. 206) and O-ring (pos. 216d). See fig. 3. Model A Model B Fig. 3 Correct fitting of thrust bearing 3. Model A: Fit and tighten nut (pos. 216b) with a strap wrench and tool for thrust bearing (pos. C and D). See section 3. Tightening torques and lubricants. 4. Check that thrust ring (pos. 206) can move freely. 5. Fit upthrust disc (pos. 242) on shaft with rotor (pos. 202). 6. Insert shaft with rotor (pos. 202) carefully into stator housing (pos. 201). 7. Fit stationary thrust bearing (pos. 203) on shaft with rotor (pos. 202). 8. Lubricate the inner thread of lower bearing retainer (pos. 236) and outer thread of stator housing (pos. 201). See section 3. Tightening torques and lubricants. 9. Fit lower bearing retainer (pos. 236) on shaft with rotor (pos. 202) so that the pins engage with the slots of thrust bearing (pos. 203). See fig. 4. TM TM TM Fig. 4 Position of thrust bearing 10.Press on lower bearing retainer (pos. 236) to push shaft with rotor (pos. 202) home into stator housing (pos. 201). 11. Fasten lower bearing retainer (pos. 236) on stator housing (pos. 201) with tool for bearing retainer (pos. A). See section 3. Tightening torques and lubricants. 12.Fit the two screws (pos. 236a) for lower bearing retainer (pos. 236). See section 3. Tightening torques and lubricants. 13.Slacken screw (pos. 215) in lower bearing retainer (pos. 236). 14.Place stator housing (pos. 201) in a vertical position. 15.Fit upper bearing retainer (pos. 205) on shaft with rotor (pos. 202). Check that it is in the correct position. 16.Check the distance between rotor shaft end (pos. 202) and stator housing (pos. 201) using a shaft height gauge (pos. G). The distance must be 72.8 ± 0.2 mm. See fig / 30

11 17.Turn thrust bearing retainer (pos. 210) with a tee key or a similar tool to adjust the distance. See fig. 5. Fig. 5 Adjusting the distance 18.Check the distance between rotor shaft end (pos. 202) and stator housing (pos. 201) again. The distance must be 72.8 ± 0.2 mm. See fig. 6. TM TM Fig. 6 Checking the distance 19.Place the stator in a horizontal position and tighten screw (pos. 215) in lower bearing retainer (pos. 236). See section 3. Tightening torques and lubricants. 20.Fit strainer (pos. 207). 21.Lubricate the thread of lower bearing retainer (pos. 236) and end cover (pos. 213). See section 3. Tightening torques and lubricants. 22.Check that diaphragm (pos. 212), spring (pos. 218) and O-ring (pos. 224) are positioned correctly in end cover (pos. 213), and that they are intact. 23.Screw end cover (pos. 213) on lower bearing retainer (pos. 236). 24.Tighten end cover (pos. 213) with tool for end cover (pos. B). See section 3. Tightening torques and lubricants. Filling of motor liquid 1. Place stator housing (pos. 201) in a vertical position. Pull out upper bearing retainer (pos. 205) using an angle screwdriver (pos. N) or a similar tool. 2. Fill stator housing (pos. 201) with motor liquid. 3. Tilt stator housing (pos. 201) and turn shaft with rotor (pos. 202) to let air escape. Do not lift the rotor shaft. 4. Place stator housing (pos. 201) in a vertical position. 5. Fill more motor liquid into stator housing (pos. 201), if necessary. 6. Fit upper bearing retainer (pos. 205) on shaft with rotor (pos. 202). Check that it is in the correct position. 7. Model A: Lubricate rotor shaft end (pos. 202) and rotating shaft seal part (pos. 226b) with motor liquid. Model B: Fit washer (pos. 153a). 8. Fit rotating shaft seal part (pos. 226b) on shaft with rotor (pos. 202) using a soft punch (pos. E). 9. Press stationary shaft seal part (pos. 226a) out of shaft seal housing (pos. 226) with a screwdriver. 10.Knock lip seal (pos. 232) out of shaft seal housing (pos. 226) with a screwdriver (pos. M) and a rubber mallet (pos. P). It may be stuck. 11 / 30

12 11. Fit a new lip seal (pos. 232) in shaft seal housing (pos. 226) with the flat side against the motor. Use a soft punch (pos. E) and a rubber mallet (pos. P). See fig Press a new stationary shaft seal part (pos. 226a) into shaft seal housing (pos. 226) with the shiny side against the motor. Use a soft punch (pos. E). See fig Check that stationary shaft seal part (pos. 226a) is positioned correctly in shaft seal housing (pos. 226). TM Fig. 7 Correct fitting of lip seal and stationary shaft seal part 14.Lubricate the thread of shaft seal hosing (pos. 226). See section 3. Tightening torques and lubricants. 15.Tighten shaft seal housing (pos. 226). See section 3. Tightening torques and lubricants. 16.Push sand shield (pos. 229) onto shaft with rotor (pos. 202). 17.Check that the shaft rotates freely and noiselessly. 18.Place stator housing (pos. 201) at an angle of approximately 45 with valve (pos. 222) pointing upwards. 19.Remove valve (pos. 222). Fill the stator housing with motor liquid using a filling syringe (pos. H). Move shaft with rotor (pos. 202) up and down in stator housing (pos. 201) to let air escape. Repeat until the stator housing has been filled. 20.Fit valve (pos. 222). See section 3. Tightening torques and lubricants. 21.Connect motor cable (pos. 220) in stator housing (pos. 201) and fasten motor cable (pos. 220). See section 3. Tightening torques and lubricants. 12 / 30

13 kw / 5-40 hp Dismantling the motor 1. Remove the two screws of motor cable (pos. 248). 2. Pull motor cable (pos. 220) out of stator housing (pos. 201). Check it for visible damage. 3. Remove sand shield (pos. 229). 4. Remove shaft seal housing (pos. 226). 5. Pull off rotating shaft seal part (pos. 226b) using two screwdrivers. 6. Model B: Remove washer (pos. 153a). 7. Check the spring action of rotating shaft seal part (pos. 226b). 8. Pull out upper bearing retainer (pos. 205) using an angle screwdriver (pos. N) or a similar tool. 9. Check the bearing surfaces of upper bearing retainer (pos. 205). 10.Tilt stator housing (pos. 201) and drain the motor liquid into a bucket. 11. Place the stator housing in a horizontal position and loosen end cover (pos. 213) with tool for end cover (pos. B) and a strap wrench (pos. C). 12.Remove strainer (pos. 207) and the two screws (pos. 215). 13.Screw thrust bearing retainer (pos. 210) out of thrust bearing housing (pos. 219). 14.Remove thrust bearing housing (pos. 219) with tool for end cover (pos. B) and remove stationary thrust bearing (pos. 203) from shaft with rotor (pos. 202). 15.Check if stationary thrust bearing (pos. 203) is worn or damaged. 16.Model A: Remove nut (pos. 216b) and washer (pos. 216). Hold shaft with rotor (pos. 202) with tool for shaft (pos. D). Model B: Remove O-ring (pos. 216d) and thrust ring (pos. 206). Check if they are worn or damaged. 17.Model A: Remove rotating thrust ring (pos. 206), thrust bearing support (pos. 208) and upthrust disc (242) from shaft with rotor (pos. 202). Check if they are worn or damaged. Model B: Remove thrust bearing support (pos. 208). Check if it is worn or damaged. Replace, if necessary. 18.Slacken the two screws (pos. 236a) of lower bearing retainer (pos. 236). 19.Remove lower bearing retainer (pos. 236) with tool for bearing retainer (pos. A). 20.Check if the radial bearings in lower bearing retainer (pos. 236) are worn or damaged. 21.Pull out shaft with rotor (pos. 202). Check if the rotor has dragged against the stator, and if the bearing surfaces of the rotor are worn. 13 / 30

14 7.2.2 Assembling the motor Fitting the shaft with rotor 1. Model B: Fit upthrust disc (pos. 242) on shaft with rotor (pos. 202). 2. Insert shaft with rotor (pos. 202) carefully into stator housing (pos. 201). 3. Lubricate the inner thread of lower bearing retainer (pos. 236) and outer thread of stator housing (pos. 201). See section 3. Tightening torques and lubricants. 4. Fit lower bearing retainer (pos. 236) on shaft with rotor (pos. 202). 5. Fasten lower bearing retainer (pos. 236) on stator housing (pos. 201) with tool for bearing retainer (pos. A). See section 3. Tightening torques and lubricants. 6. Fit and tighten the two screws (pos. 236a). See section 3. Tightening torques and lubricants. 7. Model A: Fit upthrust disc (pos. 242) on shaft with rotor (pos. 202). 8. Model A: Fit thrust bearing support (pos. 208) and thrust ring (pos. 206) on shaft with rotor (pos. 202). See fig. 8. Model B: Fit conical thrust bearing support (pos. 208) using punch (pos. K). Hold shaft with rotor (pos. 202). Fit thrust ring (pos. 206) and O-ring (pos. 216d). See fig. 8. Model A Model B TM TM Fig. 8 Correct fitting of thrust bearing 9. Model A: Fit washer (pos. 216) on the rotor shaft and tighten nut (pos. 216b) with your fingers. 10.Check that thrust ring (pos. 206) can move freely. 11. Model A: Tighten nut (pos. 216b) with tool for shaft (pos. D). See section 3. Tightening torques and lubricants. 12.Model A: Check that thrust ring (pos. 206) can move freely. 13.Lubricate the thread of lower bearing retainer (pos. 236) and thrust bearing housing (pos. 219). See section 3. Tightening torques and lubricants. 14.Place stationary thrust bearing (pos. 203) at the bottom of thrust bearing housing (pos. 219) with the bearing surfaces against rotating thrust bearing (pos. 206). 15.Screw thrust bearing housing (pos. 219) on the lower bearing retainer (pos. 236) while holding stationary thrust bearing (pos. 203) in position with a finger through the hole in thrust bearing housing (pos. 219). See fig / 30

15 16.Keep holding stationary thrust bearing (pos. 203) in position with a finger and press shaft with rotor (pos. 202) down against stationary thrust bearing (pos. 203). Fig. 9 Keeping the stationary thrust bearing in position 17.Tighten thrust bearing housing (pos. 219) with tool for end cover (pos. B). See section 3. Tightening torques and lubricants. 18.Lubricate the thread of thrust bearing retainer (pos. 210) and fit it into thrust bearing housing (pos. 219). See section 3. Tightening torques and lubricants. 19.Place stator housing (pos. 201) in a vertical position. 20.Fit upper bearing retainer (pos. 205) on shaft with rotor (pos. 202). Check that it is in the correct position. 21.Check the distance between rotor shaft end (pos. 202) and stator housing (pos. 201) using a shaft height gauge (pos. G). The distance must be 72.8 ± 0.2 mm. See fig Turn thrust bearing retainer (pos. 210) to adjust the distance. See fig. 10. TM TM Fig. 10 Adjusting the distance 23.Place the stator housing in a horizontal position and tighten the two screws (pos. 215). See section 3. Tightening torques and lubricants. 24.Fit strainer (pos. 207). 25.Lubricate the thread of thrust bearing housing (pos. 219) and end cover (pos. 213). See section 3. Tightening torques and lubricants. 26.Check that diaphragm (pos. 212), spring (pos. 218) and O-ring (pos. 224) are positioned correctly in end cover (pos. 213), and that they are intact. 27.Screw end cover (pos. 213) on lower bearing retainer (pos. 236). 28.Place stator housing (pos. 201) in a horizontal position. 29.Tighten end cover (pos. 213) with tool for end cover (pos. B). See section 3. Tightening torques and lubricants. 15 / 30

16 Filling of motor liquid 1. Place stator housing (pos. 201) in a vertical position. 2. Pull out upper bearing retainer (pos. 205) using an angle screwdriver (pos. N) or a similar tool. 3. Fill stator housing (pos. 201) with motor liquid. Move shaft with rotor (pos. 202) up and down in stator housing (pos. 201) to let air escape. 4. Tilt stator housing (pos. 201) and turn shaft with rotor (pos. 202) to let air escape. 5. Place stator housing (pos. 201) in a vertical position. 6. Fill more motor liquid into stator housing (pos. 201), if necessary. 7. Move shaft with rotor (pos. 202) up and down in stator housing (pos. 201) to let air escape. 8. Fit upper bearing retainer (pos. 205) on shaft with rotor (pos. 202). Check that it is in the correct position. 9. Lubricate rotor shaft end (pos. 202) and rotating shaft seal part (pos. 226b) with motor liquid. 10.Model B: Fit washer (pos. 153a). 11. Fit rotating shaft seal part (pos. 226b) on shaft with rotor (pos. 202) using a soft punch (pos. E). 12.Press stationary shaft seal part (pos. 226a) out of shaft seal housing (pos. 226) with a screwdriver. 13.Knock lip seal (pos. 232) out of shaft seal housing (pos. 226) with a screwdriver (pos. M) and a rubber mallet (pos. P). Note: It has a tight fit. 14.Fit a new lip seal (pos. 232) in shaft seal housing (pos. 226) with the flat side against the motor. Use a soft punch (pos. E) and a rubber mallet (pos. P). See fig Press a new stationary shaft seal part (pos. 226a) into shaft seal housing (pos. 226) with the shiny side against the motor. Use a soft punch (pos. E). See fig. 11. TM Fig. 11 Correct fitting of lip seal and stationary shaft seal part 16.Check that stationary shaft seal part (pos. 226a) is positioned correctly in shaft seal housing (pos. 226). 17.Lubricate the thread of shaft seal hosing (pos. 226). See section 3. Tightening torques and lubricants. 18.Tighten shaft seal housing (pos. 226). See section 3. Tightening torques and lubricants. 19.Push sand shield (pos. 229) onto shaft with rotor (pos. 202). 20.Check that the shaft rotates freely and noiselessly. 21.Place stator housing (pos. 201) at an angle of approximately 45 with valve (pos. 222) pointing upwards. 22.Remove valve (pos. 222). Fill the stator housing with liquid using a filling syringe (pos. H). Move shaft with rotor (pos. 202) up and down in stator housing (pos. 201) to let air escape. Repeat until the stator housing has been filled. 23.Fit valve (pos. 222). See section 3. Tightening torques and lubricants. 24.Connect motor cable (pos. 220) in stator housing (pos. 201) and fasten motor cable (pos. 220). See section 3. Tightening torques and lubricants. 16 / 30

17 8. Maintenance and service Warning If a motor has been used in a liquid which is injurious to health or toxic, the motor will be classified as contaminated. If Grundfos is requested to service a contaminated motor, Grundfos must be contacted with details about the pumped liquid, etc. before the motor is returned for service. Otherwise Grundfos can refuse to accept the motor for service. Possible costs of returning the motor are paid by the customer. 9. Fault finding Fault Cause Remedy 1. The motor does not run. a) The fuses are blown. Replace the fuses. Check the electrical installation and the submersible drop cable if the new fuses burn too. b) The ELCB or the voltage-operated Cut in the circuit breaker. ELCB has tripped out. c) No power supply. Contact the power supply company. d) Motor-protective circuit breaker has tripped. Cut in the motor-protective circuit breaker (takes places automatically or must be done manually). Check the voltage if the motor-protective circuit breaker trips again. If the voltage is okay, see the items e) to h). e) Motor-protective circuit breaker/ contactor is defective. Replace the motor-protective circuit breaker/contactor. f) Starter device is defective. Repair/replace the starter device. g) The control circuit has cut out or is defective. Check the electrical installation. h) Motor/submersible drop cable is defective. Repair/replace the motor/submersible drop cable. 17 / 30

18 10. Checking the motor and cable 1. Supply voltage Measure the voltage between the phases by means of a voltmeter. On single-phase motors, measure between phase and neutral or between two phases, depending on the type of supply. Measure on the terminals where the submersible drop cable is connected. When the motor is loaded, the voltage should be within the required voltage quality for Grundfos MS and MMS submersible motors which - measured at the motor terminals - is - 10 %/+ 6 % of the rated voltage for continuous operation (including variation in the supply voltage and losses in cables). Check also that there is voltage symmetry in the power supply lines, i.e. the same difference of voltage between the individual phases. Large variations in voltage may cause the motor to burn. Large variations in voltage indicate poor power supply, and the motor should be stopped until the defect has been remedied. TM Current consumption TM TM Measure the current of each phase while the pump is operating at a constant discharge pressure (if possible, at the capacity where the motor is most heavily loaded). For maximum operating current, see nameplate. On three-phase motors, the difference between the current in the phase with the highest current consumption and the current in the phase with the lowest current consumption must not exceed 5 %. If so, or if the current exceeds the maximum operating current, there are the following possible faults: The contacts of the motor-protective circuit breaker are burnt. Replace the contacts or the control box for singlephase operation. Poor connection of conductors, possibly in the cable joint. See item 3. Too high or too low supply voltage. See item 1. The motor windings are short-circuited or partly disjointed. See item 3. Damaged pump is causing the motor to be overloaded. Pull out the pump for overhaul. The resistance value of the motor windings deviates too much (three-phase). Move the phases in phase order to a more uniform load. If this does not help, see item 3. Items 3 and 4: Measurement is not necessary when the supply voltage and current consumption are normal. 3. Winding resistance Disconnect the submersible drop For three-phase motors, the difference between the cable at the motor-protective highest and lowest winding resistance must not exceed 10 circuit breaker. Measure the %. If the deviation is higher, pull out the motor. Measure winding resistance between the motor, motor cable and submersible drop cable separately, conductors of the submersible and repair/replace defective parts. drop cable. See section 11. Winding resistances. Note: Include the resistance of the submersible drop cable. See section 11.3 Resistance values for cables. 4. Insulation resistance TM Disconnect the submersible drop cable at the motor-protective circuit breaker. Measure the insulation resistance from each phase to earth (frame). Make sure that the earth connection is made carefully. If the insulation resistance deviates from the values in section 10.1 Insulation resistance, the motor should be pulled out for motor or cable repair. Local regulations may stipulate other values of insulation resistance. 18 / 30

19 10.1 Insulation resistance Note The insulation resistance must be measured in accordance with local regulations. The table shows suggested values of insulation resistance and the test voltage in relation to the rated voltage of the motor. Rated voltage: 500 [V] > 500 [V] Condition of motor and cable [MΩ] [MΩ] New motor (without submersible drop cable) Used motor which can be re-installed in well New motor in well Motor in good condition in well Damaged insulation < 0.5 < 1 If the rated motor voltage is 500 V, the insulation resistance must be measured at a test voltage of 500 VDC. If the rated motor voltage is > 500 V, the insulation resistance must be measured at a test voltage of 1000 VDC. 19 / 30

20 11. Winding resistances 11.1 MS6T30 Voltage Output power Between two phases Winding resistance Across one phase [kw] [hp] [Ω] 3 x V, 50 Hz, DOL 3 x V, 50 Hz, SD 3 x V, 50 Hz, DOL 3 x V, 50 Hz, SD 3 x V, 60 Hz, DOL / 30

21 Voltage Output power Between two phases Winding resistance Across one phase 3 x V, 60 Hz, DOL 3 x V, 60 Hz, SD 3 x 380 V, 60 Hz, DOL 3 x 380 V, 60 Hz, SD 3 x 400 V, 50 Hz, 3 x V, 60 Hz, DOL [kw] [hp] [Ω] / 30

22 Voltage Output power Between two phases Winding resistance Across one phase 3 x V, 50 Hz, 3 x 575 V, 60 Hz, DOL [kw] [hp] [Ω] MS6T60 Voltage Output power Between two phases Winding resistance Across one phase [kw] [hp] [Ω] 3 x V, 50 Hz, DOL 3 x V, 50 Hz, SD 3 x 380 V, 60 Hz, DOL 3 x 200 V, 50 Hz, 3 x V, 60 Hz, DOL 3 x 200 V, 50 Hz, 3 x V, 60 Hz, SD / 30

23 Voltage Output power Between two phases Winding resistance Across one phase [kw] [hp] [Ω] 3 x 400 V, 50 Hz, 3 x V, 60 Hz, DOL 3 x 400 V, 50 Hz, 3 x V, 60 Hz, SD / 30

24 11.3 Resistance values for cables The resistance in the power supply cable depends on the cable diameter. Resistance per metre of cable: 1.5 mm 2 = Ω. Resistance per metre of cable: 2.5 mm 2 = Ω Cable connection Flat cable Single leads Pos. 4-wire 3-wire 4-wire 1 Brown Black Black 2 Black Yellow Yellow 3 Grey Red Red 4 Yellow/green - Green DOL SD TM Fig. 12 Wiring diagrams 24 / 30

25 12. Drawings, model A kw / 5-12 hp Exploded view TM Fig kw / 5-12 hp, model A 25 / 30

26 Sectional drawing TM Fig kw / 5-12 hp, model A 26 / 30

27 kw / hp Exploded view TM Fig kw / hp, model A 27 / 30

28 Sectional drawing TM Fig kw / hp, model A 28 / 30

29 13. Drawings, model B kw / 5-12 hp Exploded view TM Fig kw / 5-12 hp, model B 29 / 30

30 Sectional drawing TM Fig kw / 5-12 hp, model B 30 / 30

31 kw / hp, model B Exploded view TM Fig kw / hp, model B 31 / 30

32 Sectional drawing TM Fig kw / hp, model B Subject to alterations. 32 / 30