EBARA TH Series Operating and maintenance manual

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End Suction Centrifugal
TH Series
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Operating Instructions, Installation & Maintenance Manual
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EBARA Pumps Americas Corporation

2
Rev10/2018
Operating, Installation, and Maintenance
Contents
Section Page
Introduction and Safety Information 2
TH Selection Chart 4
TH Specifications 7
TH Sectional View 8
Installation Instructions 9
Start-up Instructions 12
Operation 12
Maintenance and Service 12
THAssembly 14
Troubleshooting Checklist 20
Introduction
This Operation, Installation, and Maintenance manual is designed to help you get the best
performance and longest life from your EBARA pump.
This pump is a TH Series, end suction centrifugal pump. It is capable of being used in a variety of
applications including heating, air conditions, pressure boosting, cooling water transfer and non-potable
water supply.
If you have any questions regarding the pump or its applications which are not covered in this manual or
in other literature accompanying this unit, please contact your local EBARA distributor or visit
www.pumpsebara.com.
Safety Information
WARNING
IMPORTANT SAFETY INSTRUCTIONS
Rules for Safe Installation and Operation
1. Read these rules and instructions carefully. Failure to follow them could cause serious bodily injury and/or property damage.
2. Check your local codes before installing.You must comply with their rules and regulations
3. For maximum safety, this product should be connected to a grounded circuit equipped with a ground fault interrupter
device.
4. Before installing this product, have the electrical circuit checked by an electrician to make sure it is properly grounded.
5. Before installing or servicing your pump, BE CERTAIN pump power source is disconnected.
6. Make sure the line voltage and frequency of the electrical current supply agrees with the motor wiring. If motor
is dual voltage
type, BE SURE it is wired correctly for your power supply.
7. Complete pump and piping system MUST be protected against below freezing temperature. Failure to do so
could cause severe
damage and voids the Warranty.
8. Avoid system pressures that may exceed one and a half times the operating point selected from the pump performance
curve.
9. Do not run your pump dry. If it is, there will be damage to the pump seal.
!

3
Rev10/2018
Figure 1 - Transportation of components using
lug Figure 2 – Transportation of pump-motor assembly
Operating, Installation, and Maintenance
Safety Information (Continued)
PACKAGE CONTENTS
1. Be sure all parts have been furnished and that nothing has been damaged in shipment.
2. The catalog lists all parts included with package. A packing list packed with pump, also lists
contents.
3. OPEN PACKAGES AND MAKE THIS CHECK BEFORE GOING ON JOB.
HANDLING - Move with care and safety to avoid accidents or equipment damage. Heavy components
should be lifted using lugs provided, as shown in Figure 1. Pump-motor assembly must be lifted as
shown in Figure 2.
STORAGE - A rust inhibitor treatment that lasts for one year is to be applied to the inner parts of the
pump and areas that are not painted. If pump is stored over one year, a new treatment is needed. To
apply treatment, disassemble pump and clean the internal parts with organic solvents (kerosene or
benzene) to completely remove the old protective film.
Apply a new layer of inhibitor and let pump dry before reassembly. Suction and discharge nozzles must
always be covered to prevent the entry of foreign objects inside the pump.
FREEZING – Care should be taken to prevent the pump from freezing during cold weather. It may be
necessary to drain the pump casing when not in operation. Drain by removing the pipe plug in the bottom
of the casing.
ROTATION –Allmotorsshouldbecheckedtoensureproperrotation.Fillwithwaterpriortoconducting
rotationalchecks.
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STARTING – When the pump is up to operating speed, open the discharge valve to obtain desired
capacity or pressure. WARNING! DO NOT ALLOW THE PUMP TO RUN WITH THE DISCHARGE
VALVE TIGHTLY CLOSED. IF THE PUMP RUNS FOR AN EXTENDED PERIOD OF TIME WITHOUT
LIQUID BEING DISCHARGED, THE LIQUID IN THE PUMP CASING CAN GET EXTREMELY HOT
CAUSING SEVERE DAMAGE TO THE PUMP AND POSSIBLY CAUSE PERSONAL INJURY.

4
Rev10/2018
Operating, Installation, and Maintenance
Model TH Selection Chart Synchronous Speed 1750 RPM
1. 25-150
2. 25-200
3. 32-125.1
4. 32-125
5. 32-160.1
6. 32-160
7. 32-200
8. 32-350.1
9. 32-250
10. 40-125
11. 40-160
12. 40-200
13. 40-250
14. 40-315
15. 50-125
16. 50-160
17. 50-200
18. 50-250
19. 50-315
20. 65-125
21. 65-160
22. 65-200
23. 65-250
24. 65-315
25. 80-160
26. 80-200
27. 80-250
28. 80-315
29. 80-400
30. 100-160
31. 100-200
32. 100-250
33. 100-315
34. 100-400
35. 125-200
36. 125-250
37. 125-315
38. 125-400
39. 150-200
40. 150-250
41. 150-315
42. 150-400
43. 150-500
44. 200-315
45. 200-400

5
Rev10/2018
Operating, Installation, and Maintenance
Model TH Selection Chart Synchronous Speed 3500 RPM
1. 25-150
2. 25-200
3. 32-125.1
4. 32-125
5. 32-160.1
6. 32-160
7. 32-200
8. 32-350.1
9. 32-250
10. 40-125
11. 40-160
12. 40-200
13. 40-250
14. 40-315
15. 50-125
16. 50-160
17. 50-200
18. 50-250
19. 50-315
20. 65-125
21. 65-160
22. 65-200
23. 65-250
24. 80-160
25. 80-200
26. 80-250
27. 100-160
28. 100-200

6
Rev10/2018
Operating, Installation, and Maintenance
Model THD Specifications
Standard Optional
Size Suction x Discharge
ANSI Compatible
Flange
TH-25-150 – 1¼” x 1”
TH-25-200 – 1½” x 1”
TH-32 – 2” x 1¼”
TH-40 – 2½” x 1½”
TH-50 – 3” x 2”
TH-65 – 4” x 2½”
TH-80 – 5” x 3”
TH-100 – 5” x 4”
TH-125 – 6” x 5”
TH-150 – 8” x 6”
Consult factory for
threaded connections
Range of HP
Closed Coupled
Frame Mounted
1 HP to 60 HP
1 HP to 300 HP
Range of Performance
Capacity
Head
8 to 3,000
5 to 710 ft.
Liquid Handled
Type of Liquid
Temperature
Max. Working Pressure
Clean Water
221°F (105°C)
232 PSI (16 Bar)
Materials
Casing
Impeller
Shaft Sleeve
Bracket
Cast Iron
Cast Iron
304SS
Cast Iron
Consult factory for
optional materials
Shaft Seal
Seal Material
Mechanical Seal – Type 21
Carbon/Ceramic/Buna
Carbon/Ceramic/Viton
Carbon/Ceramic/EPDM
Silicon/Silicon/Viton
Direction of Rotation Clockwise when viewed from motor
Motor Type
Speed
Bearing
Single Phase
Three Phase
NEMA JP Frame
60 Hz, 1750 and 3500 RPM
2 Pole and 4 Pole
Ball Bearing
TEFC – Consult Factory
ODP - Consult Factory
TEFC - 1 HP to 60 HP
ODP - Consult Factory

7
Rev10/2018
Operating, Installation, and Maintenance
Model TH Sectional View Frame Mounted
ItemNumberPartNameMaterialNo.
001 Casing Cast Iron 1
011 Casing Cover Cast Iron 1
021 Impeller Cast Iron 1
025 Impeller Wear Ring
410 SS 1
031 Shaft SAE 1045 Steel 1
039-1 Key Steel 1
039-2 Key Steel 1
042 Shaft Sleeve 304 SS 1
048 Impeller Nut 316 SS 1
051 Bearing Housing
Cast Iron 1
093 Thrower Nitrile Rubber 1
107 Casing Wear Ring
410 SS 1
111 Mechanical Seal
Ceramic/Graphite/Buna 1
115-1 O-ring Buna 1
115-2 O-ring Buna 1
117 Gasket 2
120-1 Bolt Steel 8
120-2 Bolt Steel 6
120-3 Bolt Steel 8
120-4 Bolt Steel 1
135 Washer Steel 1
193 Plug Steel 3
696 Motor Support
Cast Iron 1
845 Bearing Cover
Cast Iron 2
849 Ball Bearing 2

8
Rev10/2018
Operating, Installation, and Maintenance
Model THD Sectional View Closed-Coupled
Item Number Part Name Material No.
001 Casing Cast Iron 1
011 Casing Cover Cast Iron 1
021 Impeller Cast Iron 1
025 Impeller Wear Ring
410 SS 1
039 Key Steel 1
042 Shaft Sleeve 304 SS 1
080 Bushing Steel 1
107 Casing Wear Ring
410 SS 1
111 Mechanical Seal Ceramic/Graphite/Buna 1
115-1 O-ring Buna 1
115-2 O-ring Buna 1
120-1 Bolt Steel 4
120-2 Bolt Steel 1
120-3 Bolt Steel 1
193 Plug Steel 3
275 Impeller Bolt Steel 1
800 Motor 1
803 Motor Bracket Cast Iron 1

9
Rev10/2018
Operating, Installation, and Maintenance
Rules for Safe Installation
LOCATION OF UNIT – The pump should be installed as near to the liquid source as is practical so that
the static suction head (vertical distance from the center line of the pump to water level) is maximized,
and so that a short, direct suction pipe may be used. The capacity of a centrifugal pump is reduced
when the unit is operated under a high suction lift. The piping should be as free from turns and bends as
possible, as elbows and fittings greatly increase friction loss. Place the unit so that it is readily accessible
for service and maintenance and on a solid foundation, which provides a rigid and vibration-free support.
Protect the pump against flooding and excess moisture.
FOUNDATION – Use a level concrete base to provide a rigid base that will minimize deflections and
vibration. Leveling should be done using metallic shims along with anchor bolts. When mounting pump to
foundation, disconnect suction and discharge pipes. Piping cannot be aligned until shaft alignment
procedure is finished. Use a precision level to adjust jackscrews to make sure the suction and discharge
flanges are level before connecting piping.
ALINGMENT PROCEDURES
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WARNING
Alignment
The alignment of the pump and motor is critical for trouble-free mechanical operation. Follow shaft
alignment procedures to prevent catastrophic failure of motor components or unintended contact of
rotating parts. It is imperative the alignment is checked after the pump is leveled on the foundation,
after the assembly has been grouted and after the piping has been connected. Misalignment can
cause noise during operation, assembly vibrations, premature bearing failure, and unit
displacement on the foundation. Failure to check alignment can cause personal injury or
damage to the motor/pump assembly. Always disconnect and lock out power to the motor before
you perform any installation or maintenance tasks.
!
Figure 3 – Foundation installation

10
Rev10/2018
Figure 4 – Alignment with feeler gauge and straight edge
Figure 5 – Coupling alignment using dial indicator
Operating, Installation, and Maintenance
Rules for Safe Installation (Continued)
ALINGMENT PROCEDURES(continued)
1. Check axial clearance of coupling at every 90° increment. (see figure 4) Axial clearances should be
examined using a feeler gauge.
2. Use a straight edge to check radial alignment at every 90° increment. Place the straight edge across
the two rims of the sleeve coupling to check there is no light path between the edge and the
coupling. The maximum admissible radial clearance is .008 in (0.2 mm.)
3. Align the assembly by loosening the motor bolts and move the motor laterally or insert shims as
needed.
4. Tighten the motor bolts then recheck the alignment.
Coupling Alignment can be performed using a dial indicator. See figure 7.
1. Make a reference line on coupling sleeves.
2. Move the dial to zero.
3. Turn the coupling half that has the dial fixed on it.
4. Make dial reading to determinate if the assembly requires an adjustment in the alignment.
GROUTING –After the alignment has been made and checked, tighten the anchor bolts, but not fully.
After this is completed the assembly base may be grouted. The anchor bolts may be tightened fully
after the grout has been able to dry for 48 hours. Grouting is necessary for a vibration free operation,
except in cases of portable units for specific applications. Unless otherwise noted in design
specifications, the metal base must be filled with grout. When grouting, please use the following
steps,
• Pour the grout into the cavities of the baseplate, vibrate as needed to avoid the formation of air
pockets or gaps.
• After piping has been connected and anchor bolts have been tightened, check the alignment of the
assembly again.
• After grouting has become completely dry, paint its edges to protect against moisture.
• Be sure to use non-shrink grout.

11
Rev10/2018
Operating, Installation, and Maintenance
Rules for Safe Installation (Continued)
PIPING - Pipes must line up and not be forced into position. Piping should be independently supported
near the pump so that no strain will be placed on the pump casing. Where any noise is objectionable,
pump should be insulated from the piping with vibration isolation devices. Always keep pipe size as large
as possible and use a minimum of fittings to reduce friction losses.
SUCTION PIPING – Suction pipe should be direct and as short as possible. It should be at least one size
larger than suction flange size and should have a minimum of elbows and fittings (5 to 6 pipe diameters
of straight pipe before inlet is recommended). The piping should be laid out so that it slopes upward to
pump without dips or high points so that air pockets are eliminated. The highest point in the suction
piping should be the pump inlet except where liquid flows to the pump inlet under pressure. The suction
pipe must be tight and free of air leaks or pump will not operate properly. To avoid vortex, make sure the
end of the suction pipe is submerged twice as much as the size of the pipe diameter.
DISCHARGE PIPING – Discharge piping should never be smaller than pump flange size and should
preferably be one size larger. A gate valve should always be installed in discharge line for throttling if
capacity is incorrect. To protect the pump from water hammer and to prevent backflow, a check valve
should be installed in the discharge line between the pump and gate valve. On points where it is
necessary to bleed air, vent valves should be installed.
ELECTRICAL CONNECTIONS – Be sure motor wiring is connected for voltage being used. Follow the
correct wiring procedure on the motor for the voltage you are using. Unit should be connected to a
separate circuit. A fused disconnect switch or circuit breaker must be used in this circuit. Wire of
sufficient size should be used to keep voltage drop to a maximum of 5%. Single phase motors have built-
in overload protection. Three phase motors require a control box. Install overload protection to help
prevent motor damage. Flexible metallic conduit should be used to protect the motor leads. Disconnect
the coupling sleeves and momentarily turn on the motor to check if the rotation direction is the same as
indicated at the pump. If the rotation is incorrect, change two power leads.
WARNING
Pre-operation Cautions
Make certain the motor is not connected to a power source until the motor is properly assembled
and mounted. Serious personal injury or damage to the motor/pump assembly could occur if the
motor is activated improperly. Only certified electricians should make electrical connections.
1. Prime the pump by adding fluid to the volute case through the top plug. To properly prime
the pump, venting may be required.
2. Check the nameplate on the motor to determine the correct wiring procedure for your
intended power source and if the motor is single or three phase. Connect the motor to a
power source by following the wiring procedure on the motor's nameplate.
!

12
Rev10/2018
Operating, Installation, and Maintenance
Start and Operation
STARTING – Please follow below procedure to start pump,
1. Check if the pump-motor assembly is aligned and securely fastened to the baseplate.
2. Check the piping is free of leakage, especially the suction piping.
3. Connect and run auxiliary pipelines and connections, if any.
4. Place the coupling guard and secure it to the baseplate.
5. Prime the pump. Remove the plug from the top of the casing. Fill with water or pumped liquid
through the hole. Place the plug back in place.
Note: Priming can also be performed using a vacuum system or directly when it is a positive
suction installation.
6. Check the rotation direction of the driver with a quick start. If the rotation direction is wrong, invert
the electric motor connection.
7. Close discharge valve and open suction valve, if any.
8. Start the driver.
9. Slowly open discharge valve. Check motor current. Motor power should not exceed nominal value.
Note: It is recommended, especially for single-phase small drivers, to check if the rotating
assembly is turning freely before starting the motor, to prevent unnecessary loads and
premature failure.
OPERATION – When the pump is up to operating speed, open the discharge valve to obtain desired
capacity or pressure. WARNING! DO NOT OPERATE FOR PROLONGED PERIODS OF TIME
WITHOUT FLOW THROUGH THE PUMP. THIS CAN RESULT IN DAMAGE TO THE MOTOR AND
PUMP. If there is a power failure, turn the power switch off. Otherwise the pump may start-up suddenly
when the power supply is resumed, exposing personnel to possible danger. When the pump is not in use
for prolonged periods, such as wintertime, drain all fluid from the pump to prevent freezing damage.
Maintenance
SERVICE - Keep ventilation openings clear of extraneous objects which may hinder free flow of air
through motor. Motor bearings are lubricated during manufacture. Additional lubrication is not required
during their normal lifetime.
WARNING
Draining
The pump and piping should always be protected against freezing temperatures. If there is any
danger of freezing, the unit should be drained. To drain the pump, remove the drain plug at the
bottom of the volute, and remove the priming plug to vent the pump. Drain all piping.
!

13
Rev10/2018
Operating, Installation, and Maintenance
Maintenance
DISASSEMBLY – All pump parts can be removed from casing without disturbing the piping. Remove
casing bolts, and motor mounting bolts, to slide the reminder of the pump and motor away from the
casing.
VOLUTE CASE
a) Drain pump case by removing drain plugs.
b) Remove the bolts securing volute case to pump bracket.
c) Pry volute case from casing cover.
IMPELLER
Hold the motor shaft and turn the impeller counterclockwise (as viewed from pump end).
SEAL
a) Remove the rotating part of the seal by pulling it off the shaft.
b) The stationary seat can be pressed from the casing cover.
CHECK LIST FOR EXAMINATION OF PUMP PARTS
IMPELLER - Replace the impeller if any vane is broken, excessive erosion shows, or if wear ring
surfaces are worn. Impeller cap screw, washer and lock washer should be replaced if damaged.
MECHANICAL SEAL - Seal face, O-ring and sealing members should be free of burrs and dirt.
Complete seal assembly should be replaced if not in perfect condition.
SHAFT- Shaft sleeve surface under seal must be clean, smooth and without any grooves. It should be
replaced if necessary.
VOLUTE AND SEAL PLATE WEAR RING SURFACES - If worn, replace the necessary part. If
furnished with pressed in wear rings, only the rings need be replaced.
GASKETS - Volute, suction pipe and discharge pipe gaskets should be checked for damage. Replace if
necessary.
NOTE
If replacement parts are ordered, please furnish the following information to your EBARA distributor:
1. EBARA Model number and Serial number on the nameplate.
2. Item numbers
3. Description of pump part
WARNING
Power Supply
Turn off power to motor and disconnect power cable before servicing unit. All maintenance
should be done by qualified personnel.
!

14
Rev10/2018
Operating, Installation, and Maintenance
THD Assembly Instruction
Pump Assembly – THD Closed Coupled
Step 1
FixO‐ring(item115)atcasecover(item011).Use
greasetoholdtheO‐ringinplace.Donotuseany
kindofadhesive,thisshouldcausechemical
damageatrubber/elastomer.

Step 2
Insertthestationarypartofmechanicalseal(item
696)intocasecover(item011)usinggreaseor
anothertypeoflubricant.Useasoftfacetoolto
avoiddamages.Afterthestationarypartisin
place,cleanthefacewithanalcoholwipe.

Step 3
Placetherotatingpartofthemechanical
sealontheshaftsleeve(item042),
centringthewashertotheimpellerside.
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Step 4 
InserttheO‐ring(item115‐2)andshaftsleeve
(item042)onthemotorshaft.
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Step 5 
Usebolts(item120‐1)tofixthebracket(item
803)tomotor‐flange

WARNING
Power
Make certain the motor is not connected to a power source. Do not install or assemble the
pump on a motor connected to a power source. Severe injury could occur if the motor
!

15
Rev10/2018
Operating, Installation, and Maintenance
THD Assembly Instruction (Continued)
Pump Assembly – THD Closed Coupled
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Step 6
Placethecasingcover(item011)onbracket(item
803).Usehexheadbolts(item120‐2).

Step 7
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
Insertthekey(item039)intomotorshaft.
Step 8 - A
Inserttheimpellerwearring(item025)onthe
impeller(item021),usingasoftfacehammer.
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Step 8 - B
Placetheimpeller(item021)onmotorshaftusing
theimpellerbolt(item275)andbushing(item080).
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Step 9
Insertthecasingwearring,(item107)oncasing
(item001)usingasoftfacehammer.


16
Rev10/2018
Operating, Installation, and Maintenance
THD Assembly Instruction (Continued)
Pump Assembly – THD Closed Coupled
Step 10 - A 
Placethecasing(item001)onthecasingcover(item
011).Fastenwithhexheadbolts(item120‐1)


17
Rev10/2018
Operating, Installation, and Maintenance
TH Assembly Instruction (Continued)
Pump Assembly – TH Frame Mounted
Step 1  
Heatthebearings(item849)toperformtheassemblyontheshaft
(item031).
Note:Ifpossible,werecommendusinganinductionheatertofacilitate
assemblyofbearings.
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Step 2 
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



Gasket 

Placethegaskets(item117)inthebearingcover(item845).
*Donotuseanyadhesivetypetoplacethegasket(item117).

Step 3 
Installtheshaft(item031)withthebearings(item849)intothe
bearinghousing(item051)accordingtheillustration.
Usesoftfacehammertoassemble.

Step 4 

Attachthebearingcovers(item845)andfastenthehexheadbolts
(item120‐3).

Step 5 

FixO‐ring(item115)atcasecover(item011).Use grease toholdthe
O‐ringinplace.Donotuseanykindofadhesive,thisshouldcause
chemicaldamageatrubber/elastomer.


18
Rev10/2018
Operating, Installation, and Maintenance
TH Assembly Instruction (Continued)
Pump Assembly – TH Frame Mounted
Step 6 
Insertthestationarypartofmechanicalseal(item696)intocase
cover(item011)usinggreaseoranothertypeoflubricant.Useasoft
facetooltoavoiddamages.Afterthestationarypartisinplace,clean
thefacewithanalcoholwipe.

Step 7


Usehexheadbolts(item120‐1)tofixthecasecover(item011)to
bearinghousing(item051).

Step 8


Placetherotatingpart ofthemechanicalsealontheshaftsleeve
(item042),centringthewashertotheimpellerside.

Step 9 

Lubricatetherotatingpartwithgrease tofacilitate assembly.

Step 10 

Placetheshaftsleeve(item042)andO‐ring(item115‐2) ontheshaft
(item031).


19
Rev10/2018
Operating, Installation, and Maintenance
THD Assembly Instruction (Continued)
Pump Assembly – TH Frame Mounted
Step 11 
Insertthekey(item039)ontheshaft(item031).
Step 12 


Installtheimpeller(item021).Locktheshaftinplace andtighten the
shaftnut(item048)withLoctite.


Step 13 


Installtheback‐pull‐outassemblyinthecasing(item001).
Installthecasingbolts(item120‐2)andtightenthem.

Step 15 

Attachthesupport(item696)withhexheadbolts(item120‐2)and
flatwasher(item135).
Note:Installthesupport(item696)alignedwiththepumpcasing(item
001).


20
Rev10/2018
Operating, Installation, and Maintenance
Troubleshooting
Trouble Possible Cause Probable Remedy
Motor Fails to Start Loss of supply voltage
Pump motor branch circuit breaker
open or tripped
Overload trips are open
Defective starter
Loose or poor connections in control
circuit
Poor contact
Open line circuit in control panel
Leads improperly connected
Defective motor
Check voltage across all phases
above circuit breakers
Check voltage below circuit
breakers (all phases) with circuit
breakers closed
Push reset button
Select manual operation and
check voltage across starter coil.
If correct voltage is measured and
starter is not energized, coil is
defective. If no voltage is
measured, control circuit is open.
(Also check with switch in AUTO)
Make visual inspection of all
connections in control circuit, or
make spot circuit checks
Open circuit breaker, close
magnetic switch by hand and
examine contactors and springs
Check voltage at T1-T2-T3; check
magnetic contactor
Check lead numbers and
connections
Repair or replace motor



Operating, Installation, and Maintenance
WARNING
Service Work
Only certified personnel should perform service work on these pumps and motors.
!