Texmo Industries Taro Pumps Borewell Parts list manual

Three Inch
Borewell
Submersible
Pump Sets
Instruction &
Operating Manual
OMBW001A 2020.01

OMBW001A 22020.01

Table of Contents
1. Introduction
2. Warranty information
3. Complying with standards
4. Contents in the packing box
5. Information about 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
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4. Contents of the
packing box
Based on model you have purchased, your Borewell
Submersible is packed along with instruction manual
and warranty card in a corrugated box
1. Introduction
2. Warranty
information
3. Complying
standards
Thank you for choosing a quality product manufactured
by Texmo Industries. We request you to read this
manual carefully to ensure that the system you have
purchased will be operated correctly.
This manual is intended to provide you with information
on your product and information on installation and
operation. You will also find information on how you
could contact Texmo 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 694: Polyvinyl Chloride insulated unsheathed and
sheathed cables / cords with rigid and flexible
conductor for rated voltages up to and
including 450/750 V
IS 3043: Code of Practice for earthing: Specifications
IS 8034: Submersible Pumpsets: Specifications
IS 9283: Motors for Submersible Pumpset: Specification
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5. Information about your pump
Taro Borewell Submersible pumpsets are manufactured
using high quality raw materials and components
using state-of-the-art manufacturing facilities. Taro
Borewell Submersible pumpsets will give trouble
free performance if they are properly installed and
maintained. Prior to installation, go through this
manual thoroughly and follow the instructions for
installation and maintenance of our submersible
pumpset so as to ensure reliable operation.
Applications include domestic and community water
supply, water supply to high rise buildings, municipal
water supply, industrial water supply.
The submersible pumpset should be installed by
technically qualified personnel in compliance with
national and local electrical codes and as per our
instructions in order to avoid electrical shocks,
unsatisfactory performance and equipment failure.
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6. Schematic drawing
View of a 3 inch Submersible Pump Set is shown below in Fig. 1:
Fig. 1 View of 3 inch Submersible Pump Set
Motor
Pump
Strainer
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7. Key specifications & features
Standard Specification of 3 inch Borewell Submersible Pumps is shown below in TABLE 1:
Phase and Power Single Phase: 1.0 HP
Motor Type Wet
Starting method DOL
Operating Voltage
Single Phase
Premium: 180 – 240 V
Power: 180 - 240 V
Prime: 160 - 220 V
Frequency 50 Hz
Speed 2850 rpm
Duty S1 Continuous
Max. Fluid Temperature 330C
Impeller Type Radial
Cable 3 Core PVC Insulated flat cable
Key features: Motor
Motor is filled with a mixture of pure clean water mixed with anti-corrosive liquid for improved
motor life
The motor houses water lubricated journal and thrust bearings
The stator winding is water cooled and is made from poly-wrapped copper wire
Texmo Industries has a wide variety of 3 inch Borewell Submersibles to meet your requirements. Please consult our
sales team / your nearest dealer to meet your specific requirements.
Product Performance Specification
OMBW001A 72020.01

Oil seal and sand guard is provided to prevent sand entry
High grade carbon thrust bearing enables reliable operation
Winding over hang protector provided to ensure the coil life
LTB 4 journal bearing bushes for longer life of motors
Motors fitted with copper rotor
Easily re-windable Squirrel-cage motor
Equipped with rubber diaphragm to compensate thermal expansion of water
High quality seal rings and sand guard to protect motor from sand entry
Special nitrile rubber bearing bushes for high wear resistance
Built-in NRV with low head loss design
Pumps fitted with high quality engineering polymer NORYL GF 30% impellers and diffuser
housings
TBRT Series pumps are provided with Stainless Steel clad Noryl diffusers
Stainless Steel pump shell for enhanced corrosion resistance
Stainless steel shaft for enhanced corrosion protection
Counter thrust collar to limit up-thrust
Key features: Pump
OMBW001A 82020.01

All submersible motors are provided with 3 core PVC insulated flat cable of length 3 metres
A Stainless Steel strainer, wrapped around the Inlet Bracket, prevents the ingress of pebbles into
the intake during pumping
Key features: Wiring Harness
Key features: Strainer
OMBW001A 92020.01

8. Cross-section view
Cross-section view of 3 Inch Submersible Motor assembled with Double D coupling mounted on the shaft is shown
below in Fig. 2:
Fig. 2 Cross-section view of 3 inch submersible motor
PART No. PART NAME
1Coupling
2 Hex. Nut
3Sand Guard
4 Hex Socket Head Cap Screw
5Bush
6Cable
7Stud
8 Cable Gland Bush
9Cable Gland
10 Oil Seal
11 Top Housing
12 Intermediate Shell - Top
13 Wdg Overhang Protector
14 Rotor With Shaft
15 Stator Stack With Winding
16 Stator Housing Shell
17 Intermediate Shell - Bottom
18 Bottom Housing
19 Parallel Key
20 Thrust Collar
21 Carbon Thrust Unit Assy
22 Thrust Insert
23 Diaphragm
24 Motor Base
6
1
27
8
9
3
4
10
11
5
12
13
14
15
16
18
17
20
21
22
23
24
19
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Cross-section view of 3 Inch Submersible radial flow pump, TRT Series, is shown below in Fig. 3:
Fig. 3 Cross-section view of 3 inch submersible radial flow pump – TRT series
PART No. PART NAME
1Cable Guard
2 Cable Clamp With Screw
3Hexagon Bolt
4 Nrv Cup Washer
5Hexagon Nut
6Sleeve
7Thrust Collar
8Bush
9 Inlet Seal Ring
10 Distance Sleeve
11 Strainer
12 CH Screw
13 Delivery Casing Outer
14 Delivery Casing Inner
15 Non - Return Valve
16 Lock Nut
17 Pump Housing
18 Impeller
19 Diffuser Housing
20 Intermediate Housing
21 Lock Pin
22 Pump Housing Shell
23 Shell Locking Nut
24 Hex Socket Head Set Screw
25 Hex Socket Head Cap Screw
26 Inlet Bracket
13
14
1
2
415
16
17
6
18
19
20
821
23
25
26
10
9
11
12
24
5
3
7
22
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Cross-section view of 3 Inch Submersible Box type radial flow pump, TBRT Series, is shown below in Fig. 4:
Fig. 4 Cross-section view of 3 inch submersible box type radial flow pump – TBRT series
PART No. PART NAME
1Cable Guard
2 Cable Clamp With Screw
3Tie Bar
4 CSK Screw
5Hexagon Nut
6 Pump Housing - Bush
7Thrust Collar
8 Impeller Sealing Plate
9Inlet Bracket
10 Strainer
11 CH Screw
12 Delivery Casing Outer
13 Hexagon Nut
14 NRV Cup Washer
15 NRV
16 Delivery Casing Inner
17 Lock Nut
18 Pump Housing
19 Sleeve
20 Impeller
21 Diffuser Housing
22 Lock Pin
23 Distance Sleeve
24 Hex Socket Head Set Screw
25 Hex Socket Head Cap Screw
1
2
3
12
13
16
15
14
4
5
17
6
19
7
20
21
22
23
25
8
9
10
24
11
18
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9. Pre-installation requirements
Arrangement for Installation
General Installation Precautions
Open the packaging and note down the serial number and model for future reference
Inspect the purchased pump for damage / leakage
Ensure all fasteners are tightened properly
Check the inside diameter of the well casing to ensure that it is not smaller than the size of the
submersible
Check depth of borewell to determine the length of piping and power cable required
Use the services of a professional and trained mechanic with experience in erecting
borewell submersibles
Ensure proper safety during installation
Ensure the availability of electrical power as indicated in Table 1
Note
If you detect damage or discrepancy in the product, contact the dealer from
whom the pump was purchased
Warning
Do not use this pump for oil or toxic, acetic, corrosive and flammable liquids.
Pumping flammable liquids could cause explosion
Caution
Do not use the pump cable for lifting / lowering the pump
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Caution
Use trained professionals to install the submersible pump. Improper fitment
can cause the pump to fall into the bottom of the bore
Warning
Use a power supply cable that has sufficient rating and has been exclusively
provided for the pump. Factor in low-voltage operation
Warning
Provide proper earthing as improper earthing can cause electrical shock
Caution
Use a Megger to verify the insulation resistance of the motor. Insulation
resistance should be 20MΩ minimum
Caution
Do not place the submersible pump with its base resting at the bottom of the
borewell. There is a possibility for the motor and pump to be buried in the silt
which collects at the bottom of the borewell
Note
Mount the pump vertically. Never inclined or horizontal
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Caution
Do not run the pump dry. It could lead to product damage
Warning
Switch OFF the power supply and ensure that the impeller completely stops
before making adjustments
Caution
Do not use this pump for pumping liquid exceeding 330C 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
Operation Precautions
OMBW001A 15 2020.01

Caution
The supply voltage should be within -15% to +6% of rated voltage.
Water temperature for operation of the pump should not exceed 330C.
Failure to observe the precautions given above could cause the pump to
malfunction, which may lead to current leakage or electrical shock.
10. Installation procedure
Please follow the below procedure to install the pump and motor.
The submersible motor is supplied pre-filled with a mixture of clear cold drinking water and anti-corrosive liquid.
The following steps are executed prior to installation:
Installation
Position the motor vertically on its base
Check if all fasteners are tight. Tighten if required
The two threaded plugs provided at the top are removed as shown in Fig. 5 below.
Check water level in the motor and if required, top up
with clear drinking water
Air bubbles, if any, are removed by gently rocking the
motor to and fro
Fig. 5 Topping up the 3 inch Submersible Motor
with Pure Drinking Water
OMBW001A 16 2020.01

The two threaded plugs are then re-assembled, ensuring the motor is encapsulated
Dry the exterior of the motor and check thoroughly for water leakage
If there is no leakage, the motor is now ready for coupling with the pump and then installation
Refer the sequence shown in Fig. 6 below for insulating the cable joint for under water application:
Danger
Hazardous voltage will cause death, serious injury, electrocution.
Disconnect all power before working on this equipment and that it cannot be
accidentally switched ON.
Before submerging the unit, measure the insulation resistance using a megger of 1000 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
Ensure that the insulation resistance, as shown on the Megger, is a minimum of 20MΩ
Waterproofing the Submersible Motor Cable - Supply Cable Joint
Checking Insulation Resistance
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Procedure for joining and Insulating
the 3 core conductors:
Procedure for joining and insulating
the cable joint for under-water cable:
Step 1: Soldering / knot the copper strands Step 6: Layer 1 - 1st layer of virgin rubber insulation
Step 7: Layer 2 - 1st layer of PVC Insulation tape
Step 8: Layer 3 - 2nd layer of PVC Insulation tape
Step 2: Layer 1 - 1st layer of virgin rubber insulation
Step 3: Layer 2 - 1st layer of PVC Insulation tape
Step 4: Layer 3 - 2nd layer of virgin rubber insulation
Step 5: Layer 4 - 2nd layer of PVC Insulation tape
Fig. 6 Cable Joint for under water application
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Checking direction of rotation of Motor
Coupling submersible motor to pump
Danger
Hazardous voltage will cause death, serious injury, electrocution.
All electrical work must be performed by an authorized electrician in
compliance with local electrical equipment standards & internal wiring codes.
After water-proofing the joint connecting the submersible motor cable and supply cable, check
if the direction of rotation of the motor shaft matches the direction marked on the visible face
of the top housing
The direction of rotation is counter-clockwise looking from the motor shaft end, as marked on
the cable box
Connect the free ends of the cable to the control panel and energize the motor for a second
or two
For added protection, continuously pour clean water over the sand guard to remove
heat generated
Check the direction of rotation of the motor shaft
If the direction of rotation is in the same direction as that marked on the Top Housing exposed
face, the connections are right
For Single-Phase models, in case the direction of rotation does not match the marking on the Top
Housing, return the set back to the dealer from where it was purchased
The tripod with chain block is erected
Unpack the submersible pump and remove the cable guard and strainer
Danger
Hazardous voltage will cause death, serious injury, electrocution.
Disconnect all power before working on this equipment and that it cannot be
accidentally switched ON.
To couple the submersible motor and pump, follow the following procedure:
OMBW001A 19 2020.01

Keep the submersible motor vertical
Couplings are supplied mounted on the motor shaft
Apply threading compound to the internal thread on the delivery casing and the external
threaded portion of the short length delivery pipe to be fitted to the delivery casing
Screw the short length of delivery pipe to the delivery casing
For motors with the coupling mounted on its shaft, carefully lower the pump while ensuring the
pump shaft is aligned with the coupling till the inlet bracket bottom face sits on the top housing
For pumps with the coupling mounted on its shaft, carefully lower the pump while ensuring the
motor shaft is aligned with the coupling till the inlet bracket bottom face sits on the top housing
Ensure that studs on the motor top housing should pass through the holes in the bottom portion
of the inlet bracket and that the face of inlet bracket rests on motor top housing.
Using hexagonal nuts, tighten the inlet bracket to top housing of the motor
Check the play by lifting the coupling with pump shaft
Lastly fit the cable guard and strainer back in position, ensuring that the cable is covered by the
Cable Guard
Refer Fig. 7 below for coupling the submersible motor to the pump:
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