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Texmo Industries Taro Pumps NCH 2250, Instructions & Operating Manual, Page: 21 / 34

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Texmo Industries Taro Pumps NCH 2250 Instructions & Operating Manual Download Page 21

Connecting the Power Supply

Caution

Observe relevant Electricity Board regulations while powering up the pumpset

Warning

 Before inserting the power plug or connecting the wires to the terminal board, make 
sure the power supply is properly disconnected. Failure to do so may lead to electrical 
shock, short, or injury caused by the unintended starting of the pump

Caution

Do not use damaged cables, power plugs, or loose power outlets. Failure to observe 
this precaution could lead to electrical shock, short circuit or fire

Power cable connection to Non-clog Sewage Pump

Refer Fig. 9a and 9b, shown below, for connecting the lead wires to the Terminal Board of Single-phase and Three-
phase Non-clog Sewage Pumps.

Connection diagram for capacitor start and run motor

Note: If top fails, interconnect Z2 & A2 using 1.5 mm² wire

Z1

Z2

A1

A2

CONNECT 220V SINGLE PHASE

SUPPLY TO A1 & A2

(GREEN)

CAPACITOR

TOP

STARTING COIL

(RED)

(YELLOW)

RUNNING COIL

(BLUE)

Z1

Z2

A1

A2

Fig. 9 Cable lead wire connections

Fig. 9(a) Single-phase - NMH-S 7040 / NMH-S1550

OMSP001A

21

2020.01

Summary of Contents for Taro Pumps NCH 2250

Page 1: ...Non Clog Sewage Pumps Instruction Operating Manual OMSP001A 2020 01 ...

Page 2: ...OMSP001A 2 2020 01 ...

Page 3: ...ut your pump 6 Schematic drawings 7 Key product specifications features 8 Cross section view 9 Pre installation requirements 10 Installation procedures 11 Basic troubleshooting 12 Preventive maintenance checks 13 Do s and don ts 14 Important safety instructions 15 Storage handling 16 Company contact information OMSP001A 3 2020 01 ...

Page 4: ...xmo Industries should you need further information or help and support Please refer to your warranty card or visit www taropumps com for more information on your warranty IS 996 Single Phase a c Induction Motors for General Purpose IS 3043 Code of Practice for earthing Specification IS 4029 Guide for testing three phase motors IS 7538 Three Phase Squirrel cage Induction Motors for Centrifugal Pump...

Page 5: ...ely filled with the pumping liquid which is retained by the flap valve assembly When the pump is started the flap valve opens and air from the suction pipe is mixed with the casing liquid The mixture of air and liquid is transferred into the larger casing outside the pumping chamber and air escapes into the delivery branch from there This process continues until all the air in the suction line is ...

Page 6: ...6 Schematic drawing View of a Non clog Sewage Monoblock is shown below in Fig 1 Fig 1 View of Non clog Sewage Monoblock OMSP001A 6 2020 01 ...

Page 7: ...e 5 0 HP Motor Type Dry Starting method Single phase CSR Three phase DOL Operating Voltage Single phase 350 440 V Three phase 180 240 V Frequency 50 Hz Speed 2P 2850 rpm 4P 1440 rpm Duty S1 Continuous Insulation Class Refer name plate Max Fluid Temperature 330 C Impeller Type Semi Open Type of Enclosure TEFC Thermal Overload Protection TOP Provided for Single phase pumps OMSP001A 7 2020 01 ...

Page 8: ... in l s 4 4 4 2 3 9 3 6 3 2 2 8 2 2 1 8 1 4 0 6 7 NMH 1550 1 5 2 50 50 7 6 8 6 5 6 2 5 8 5 4 4 8 4 5 4 2 3 4 2 4 1 4 9 NMH 2250 2 2 3 50 50 7 5 7 5 7 4 7 3 7 3 7 2 7 6 8 6 4 5 5 4 2 2 6 10 Model Name Motor Rating Pipe Size mm TOTAL HEAD VALUES SHP in mm Power consump Max Metres 6 7 8 9 10 11 12 13 14 15 16 18 20 22 24 26 KW HP Suc Del Feets 20 23 26 30 33 36 39 43 46 49 52 59 65 72 78 85 NCH 2250 ...

Page 9: ...es not require a foot valve The impeller is dynamically balanced Water slinger provided to prevent water entry into the front bearing Stainless steel sleeve within the stuffing box provides additional protection to the shaft Key features Pump For single phase pumps simply connect the supply to the two terminals For three phase pumps connect the three wires from the Direct On Line starter to the th...

Page 10: ...22 Deep Groove Ball Bearing 23 Shield 24 Rotor With Shaft 25 Hexagon Head Bolt 26 Cap No PART NAME 27 Deep Groove Ball Bearing 28 Cover Dome 29 Casing 30 Gasket Circular 31 Gasket Square 32 Hex Stud Nut 33 O Ring 34 Drain Plug 35 Stud Hex Nut 36 Hammer Drive Screw 37 NRV Disc Face 38 NRV Flap 39 Washer Cross section view of single phase Capacitor Start and Run High Speed Monoblock is shown below i...

Page 11: ...r 14 Body No PART NAME 15 Rotor With Shaft 16 Support For Body 17 C H Screw Spring Washer 18 Split Cotter Pin 19 Fan Shield 20 Fan 21 Rear Cover 22 Deep Groove Ball Bearing 23 Coil 24 Stator Stack 25 Hex Socket Set Screw 26 Eye Bolt 27 Gasket 28 Terminal Box No PART NAME 29 Terminal Box Cover 30 Terminal Board 31 Cap 32 Cover Dome 33 Gasket Circular 34 Impeller 35 Washer 36 Wear Plate 37 CSK Head ...

Page 12: ...p 39 Parallel Key 40 Love Joy Coupling Set 41 Spider 42 Hex Head Bolt Spring Washer No PART NAME 43 Cap 44 Deep Groove Ball Bearing 45 Bearing Bracket 46 Shaft 47 Deep Groove Ball Bearing 48 Sheild 49 Water Slinger 50 Square Bolt 51 Gland Packing Rope 52 Lantern Ring 53 Grease Cup 54 Plain Washer 55 Gasket Circular 56 Wear Plate 57 Plug 1 2 Bsp 58 CSK Head Hex Socket Screw 59 NRV Disc Face Fixed 6...

Page 13: ...power cable with large number of joints as this can result in a significant voltage drop While installing the pump ensure the pump is not subject to shock loads which can damage the pump parts As the pump is air cooled ensure that air flow to the cooling fan located at the rear side of the motor is not blocked Leakage past the gland is necessary to ensure that the heat generated due to friction be...

Page 14: ...are taken while lifting and lowering the product Caution Use trained professionals to install the pump Warning Use a power supply cable that has sufficient rating Factor in low voltage operation Warning Provide proper Earthing as improper Earthing can cause electrical shock Caution Do not place the pump in a location subject to flooding as water can enter the motor and damage the windings and bear...

Page 15: ...st and then run it Warning Switch OFF the power before working on electrical lines Caution Do not use this pump for pumping liquid exceeding 330 C as this may lead to product failure Warning Do not switch ON the pump if there is any human contact with the pumped medium If any electrical leakage occurs this could be fatal Note For three phase models use a starter Operation Precautions OMSP001A 15 2...

Page 16: ...this pump was purchased 10 Installation procedure Please follow the below procedure to install the pump The following steps are executed prior to installation Installation Measure the Insulation Resistance using a Megger of 500 VDC Ensure contact points are clean Connect the measuring cable to the ground conductor Connect the other measuring cable to every core of the motor cable in succession Ens...

Page 17: ...ION DRAIN PLUG BOLT NUT SUPPORT FILLING PLUG DELIVERY FLANGE SUCTION FLANGE DRAIN COVER FOUNDATION BOLT NUT CONCRETE BASE EARTH SCREWS FILLING PLUG CONCRETE BASE FOUNDATION BOLT NUT EARTH SCREWS BASE PLATE DRAIN PLUG FILLING PLUG a NMH 7040 NMH 1550 c NCH 2250 NCS 3775 b NMH 2250 OMSP001A 17 2020 01 ...

Page 18: ... plate Place the pump centre line as close as possible to the water surface and with the free end of the suction pipe fixed above the bottom of the well Refer Fig 6 shown below for recommendations Fig 6 Recommendations for locating the pump and foot valve Fig 7 Priming arrangement for Non Clog Pumps During priming check the pump suction pipe for leakages Preferably 3m SUCTION PIPE SUPPORT FOR SUCT...

Page 19: ... be performed by an authorised electrician in compliance with local electrical equipment standards and internal wiring codes Ensure pump is primed For three phase connect the pump to the starter and power up the pump Check the direction of rotation of the motor shaft If the direction of rotation is in the same direction as that marked on the casing the connections are right For Single Phase produc...

Page 20: ... or telephone ground wire Improper grounding could cause electrical shock Electrical Installation Check the power supply voltage and frequency and compare with the product requirements specified on the nameplate Observe relevant EB regulations while providing power supply to the motor As far as possible do not use multiple joints in the electrical cabling while connecting the starter to the pump G...

Page 21: ...wer outlets Failure to observe this precaution could lead to electrical shock short circuit or fire Power cable connection to Non clog Sewage Pump Refer Fig 9a and 9b shown below for connecting the lead wires to the Terminal Board of Single phase and Three phase Non clog Sewage Pumps Connection diagram for capacitor start and run motor Note If top fails interconnect Z2 A2 using 1 5 mm wire Z1 Z2 A...

Page 22: ... Fig 9 b Three phase Connect three wires from the starter to the Motor Terminals marked A B C Interchange any two line leads for change of direction NMH 7040 NMH 2250 NCH 2250 NMH 1550 NCS 3775 OMSP001A 22 2020 01 ...

Page 23: ... too high Reduce the static suction lift Suction pipe free end foot valve not sufficiently submerged Lower the suction pipe free end foot valve and ensure that the foot valve is submerged at least 1 metre below the free surface of water NRV is jammed Check and replace Motor coil burnt Rewind the motor Single phase pump capacitor weak Check and replace capacitor Low voltage operation Operate in the...

Page 24: ...ions Clean the pipe Foreign bodies lodged in impeller casing Check the impeller casing and remove the foreign bodies The valve in the discharge pipe is partly closed blocked Check and clean replace the valves if necessary Impeller is worn out Check and replace Total head developed is too low Clearance between pump impeller and wear plate increased Check and replace worn out parts Abrasive and or c...

Page 25: ...cessive replace impeller Pump leaks excessively Gland not adequately tightened Tighten the gland Packing rope and oil seal worn out Replace packing Rope and Oilseal Casing gaskets damaged Check and replace gaskets Pipeline damaged Check and replace piping Mechanical Seal damaged Check and replace Mechanical Seal Note Conduct trial operation after maintenance Warning Do not try to solve unspecified...

Page 26: ...OMSP001A 26 2020 01 ...

Page 27: ...ecklist does not represent an exhaustive survey of maintenance steps necessary to ensure safe operation of the Non clog sewage pump Warning The pump must not be operated with the delivery valve shut off for more than a few seconds otherwise the motor will overheat possibly causing permanent damage Warning Engage the services of an electrician to carry out electrical measurements checking the funct...

Page 28: ...n of the motor Priming time All pump connections Pump noise Open the pump and check and clean internal parts Replace gland packing if worn out Replace shaft sleeve if worn out Inspect the integral NRV and replace if necessary Remove the impeller and inspect for wear and tear Replace if wear is excessive Inspect the wear plate and replace if worn out Replace gland packing if worn out Replace shaft ...

Page 29: ...o not over tighten the gland Tighten so that at least 20 drops of water continuously flows past the gland thereby ensuring cooling of the shaft Mount the pumpset on a level foundation Do not restrict the space behind the cooling cover as this will obstruct the flow of air required for cooling of the motor Check the direction of rotation of the pumpset matches the arrow mark cast on the casing Do n...

Page 30: ... handling installation and maintenance It is suggested that in case of non functioning of the product the customer is requested to contact the dealer through whom the purchase was made Danger Hazardous voltage will cause death serious injury electrocution Disconnect all power before working on this equipment Maintenance should be performed by only qualified personnel OMSP001A 30 2020 01 ...

Page 31: ...d check the condition of the rubber components and the condition of grease in the ball bearings Caution If the Non clog Sewage Pumps are stored the shaft must be turned by hand at least once a month Caution If the Non clog Sewage Pump has been stored for more than one year before installation dismantle the motor and check the rotating parts before use Ensure the impeller can rotate freely when tur...

Page 32: ...16 Company contact information For most up to date information on Texmo Industries please visit www taropumps com OMSP001A 32 2020 01 ...

Page 33: ...OMSP001A 33 2020 01 ...

Page 34: ...P B No 5303 Mettupalayam Road Coimbatore 641 029 India 1800 102 8888 www taropumps com info taropumps com OMSP001A 2020 01 ...

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