Page 1
Submersible Sump/Drainage Pump
Model DSU
Model DSHU
Operating Instructions, Installation & Maintenance Manual
EBARA Fluid Handling
EBARA International Corporation
CALL 1-800-577-8111 FOR SALES AND SUPPORT
Page 2
EBARA Submersible Semi-vortex Sewage Pumps DVSU/DVSHU
Operating, Installation, and Maintenance
CALL 1-800-577-8111 FOR SALES AND SUPPORT
Contents
Section Page
Safety Information and Introduction .................................................................................................. 2
Specifications .................................................................................................................................... 2
Pump Checks .................................................................................................................................... 3
Installation .......................................................................................................................................... 4
Operation .......................................................................................................................................... 7
Maintenance and Service .................................................................................................................. 8
Other .................................................................................................................................................. 11
Safety Information and Introduction
WARNING
Before handling this pump, always disconnect the power first. Do not use sparkable electrical devices or flames
in a septic (gaseous) or possible septic sump.
Do not work under heavy suspended objects unless there is a positive support under it to stop its fall in event
of sling or hoist failure. Disregard of this warning could result in personal injury.
This pump should only be serviced by qualified or factory trained personnel.
CAUTION
This instruction manual includes necessary items for installation, operation, and maintenance. Read this manual carefully
to ensure correct installation, operation, and maintenance.
Be sure to keep this instruction manual on hand for future reference.
Design of this EBARA pump is based on superior engineering and long experience. To prevent trouble and provide satisfactory operation and
long life, it is important to understand the EBARA pump thoroughly by careful study of this manual. If any questions arise regarding this manual,
please direct them to EBARA INTERNATIONAL CORPORATION.
Specifications
CAUTION
Be careful not to exceed the given specifications in the use of your products.
Check the nameplate for your pump's head (HEAD), discharge volume (CAPACITY), speed (SPEED), motor voltage and current.
Other specifications are noted in the chart below.
Item Specifications
Model DSU Model DSHU
Type Sewage, waste water, miscellaneous drain water
Liquid handled Temperature 32 - 122
Casing Cast iron
Materials Impeller Cast iron
Shaft 403 stainless steel
Motor type Air-filled submersible motor
Shaft seal lubrication oil Turbine No. 32 ISO VG - 32 Rotaly compressor oil A
Maximum water depth 65 ft 65 ft
Installation Floor mounted
••
F Motor: 1/2, 1HP: 32-158••F
Motor: 2-5HP: 32-176
••
F
EBARA Fluid Handling
rev. 0706
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EBARA Submersible Semi-vortex Sewage Pumps DSU/DSHU
Operating, Installation, and Maintenance
Installation
1. Check the following before beginning installation:
Insulation resistance measurement:
(1) For three phase motor:
With the motor and cable (excluding the power supply connections) immersed in water, use a meggar to measure the
insulation resistance between the ground wire and each phase of the motor.
(2) For single phase motor:
Use a megger to measure the insulation resistance betweeb each wire and grounding wire.
Pump Checks
1. Check the following points upon receipt of
your pump:
(1) Check the name plate to confirm that it is the pump
ordered.
(2) Ensure that the pump voltage is the same as the power
at your location.
(3) Check oil level at oil plug.
(4) Check that all plugs and fastening bolts are properly
tightened.
(5) Check that the pump has not been damaged and the
cable glands and cables are in a satisfactory condition.
(6) Check accessories and spare parts against the packing
list.
(7) Check that the impeller turns smoothly by hand.
2. Precautions when operation is suspended:
(1) If operation is to be suspended for 30 days with the pump
immersed in water, measure the insulation resistance of the
motor.
If resistance is over 1 mega ohm, operate pump to prevent
rust from developing on moving parts. Follow the instructions
under OPERATION when pump operation is to be resumed.
(2) For dry storage, clean out pump and store in a dry place.
Follow the instructions under INSTALLATION and OPERATION
when pump operation is to be resumed.
WARNING
Before insulation resistance measurement, always disconnect the power first.
All electrical work should be performed by a qualified electrician and all national and local electrical codes must
be observed.
CAUTION
When measuring the insulation resistance with meggar for motor windings do not test overload protection.
Overload protection is MOTOR PROTECTION (AUTO-CUT) that is used for up to 5HP; the motor still could have power to
it if AUTO-CUT is kicked out.
CAUTION
Measure the insulation resistance. The value should be more than 1 mega ohm. While making the measurement, keep the
power supply cable off the ground.
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Page 4
EBARA Submersible Semi-vortex Sewage Pumps DSU/DSHU
Operating, Installation, and Maintenance
Installation
2. Pump Installation
1. Clean the installation area.
2. Under no circumstances should the cable be pulled while
the pump is being transported or installed. Attach a chain
or rope to the grip and install the pump.
3. This pump must not be installed on its side. Ensure that it
is installed upright on a secure base.
4. Install the pump at a location in the tank where there is
the least turbulence.
5. If there is a flow of liquid inside the tank, support the
cable where appropriate (See Fig. 1).
6. Install piping so that air will not be entrapped. If piping
must be installed in such a way that air pockets are
unavoidable, install an air release valve wherever such air
pockets are most likely to develop.
7. Do not permit end of discharge piping to be submerged,
as backflow will result when the pump is shut down.
8. Non-automatic pumps (model DSU, DSHU) do not
have an automatic operating system based on built-in
floats. Do not operate the pump for a long time with the
water level near the minimum operating level as the
automatic cut-off switch incorporated inside the motor will
be activated.
To avoid dry operation, install an automatic operating
system, as shown in Fig. 2 and maintain a safe operating
water level.
WARNING
When lifting the pump, use appropriate crane (or hoist) and lift system, check position and tightness of lift system
so that weight of the pump is not UNBALANCED.
Failure to observe this precaution can result in serious accidents.
Handle the cables very carefully. If they are bent or pulled excessively, the cable and the moulded seal may be
damaged, resulting in insulation failure. Also, care is needed to protect cable ends against water intrusion.
CAUTION
Before installation check rotation. Correct rotation is clockwise when viewed from top of motor. Read ELECTRICAL WIRING.
Fig. 1
Fig. 2
Size Output L
(inch) (HP) (inch)
2 1/3-5 4 1/8
1-2 4 15/16
3 3-5 6 1/8
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Page 5
EBARA Submersible Semi-vortex Sewage Pumps DSU/DSHU
Operating, Installation, and Maintenance
WARNING
Check that the power is locked off and disconnected before working on pump. All electrical work should be
performed by a qualified electrician and all national and local electrical codes must be observed.
Three Phase
• Model DVSU
E : GREEN
U : RED
V : WHITE
W : BLACK
PR : PROTECTOR
(AUTO-CUT)
L
1
: RED
L2: WHITE
L3: BLACK
PR
for 230V
PR
for 460V
208/230V 460V
E : GREEN
L
1
: RED
L
2
: WHITE
L
3
: BLACK
PROTECTOR
Three Phase – Hot Water Type
• Model DVSHU
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Page 6
EBARA Submersible Semi-vortex Sewage Pumps DSU/DSHU
Operating, Installation, and Maintenance
Installation
(2) Cable
a) Never let the end of the cable contact water
b) If the cable is extended, do not immerse the splice in
water.
c) Fasten the cable to the discharge piping with tape or
vinyl strips.
d) Install the cable so that it will not overheat.
Overheating is caused by coiling the cable and exposing
it to direct sunlight.
(3) Grounding
As shown in Fig. 4 ground the green wire (label E). Under
no circumstances should the green wire be connected to
the power supply.
(4) Use short circuit breakers to prevent danger of electrical
shock.
Operation
1. Before starting the pump:
(1) After completing installation, measure the insulation resistance again as described in INSTALLATION.
(2) Check water level.
If the pump is operated continuously for an extended period of time in a dry condition or at the lowest water level, the
motor protector (less than 10HP) will be activated.
Constant repetition of this action will shorten pump service life. Do not start the pump again in such a situation until after
the motor has completely cooled.
2. Test Operation:
(1) Model DSU, DSHU
a) Turn the operating switch on and off a couple of times to check for normal pump start.
b) Check the direction of rotation. If discharge volume is low or unusual sounds are heard when the pump is operating,
rotation has been reversed. When this happens, reverse two of the three wires.
c) Check amperage, voltage, and head pressure.
Maintenance and Service
Check pressure, output, voltage, current, vibration, and other specifications. Unusual readings may indicate a problem requiring
immediate service. Contact your local EBARA INTERNATIONAL CORPORATION representative as soon as possible.
CAUTION
Check rotation. Correct rotation is clockwise when viewed from top of motor. Pump should be started with gate valve
closed, and then the operator should open the valve gradually.
Fig. 4
WARNING
Disconnect power cable from power source before servicing unit.
Normal maintenance should be done by qualified personnel.
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Page 7
EBARA Submersible Semi-vortex Sewage Pumps DSU/DSHU
Operating, Installation, and Maintenance
Maintenance and Service
1. Daily inspections:
(1) Check current and ammeter fluctuation daily. If ammeter fluctuation is great, even though within the limits of pump
rating, foreign matter may be clogging the pump. If the quantity of liquid discharged falls suddenly, foreign matter may
be blocking the suction inlet.
2. Regular inspections:
(1) Monthly inspections
Measure the insulation resistance. The value should be more than 1 mega ohm. If resistance starts to fall rapidly even
with an initial indication of over 1 mega ohm, this may be an indication of trouble and repair work is required.
(2) Every 6 months
Check the mechanical seal every six months. If you notice water
mixed with the oil or cloudy texture of the oil, these may be
indications of a defective mechanical seal requiring replacement.
The service life of the mechanical seal can be prolonged by
replacing the oil in the mechanical seal chamber once a year.
When replacing the oil, lay the pump on its side, with filler plug
on top as shown in Fig. 5.
For model DSU motors, inject turbine oil No. 32 (ISO VG-32) until it overflows. For model DSHU motors inject rotaly compressor
oil A until it overflows. Be certain to dispose of oil residue properly.
(3) Yearly preventive maintenance
Conduct an overhaul of the pump annually. These intervals will reduce the possibility of future trouble.
3. Parts that will need to be replaced:
Replace the appropriate part when the following conditions are apparent.
Above replacement schedule is based on normal operating conditions.
Fig. 5
Table 1
HP Oil
1/3 4 ozs
1/2 6 ozs
1 6 ozs
2 12 ozs
3 57 ozs
5 57 ozs
Replaceable Part Mechanical Seal Oil Filter plug gasket Lubricating oil O-ring
Whenever oil in Whenever oil is Whenever clouded Whenever pump
Replacement guide mechanical seal replaced or or dirty is overhauled
chamber is clouded inspected
Frequency Annually Annually Annually Annually
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Page 8
EBARA Submersible Semi-vortex Sewage Pumps DSU/DSHU
Operating, Installation, and Maintenance
Troubleshooting
CAUTION
All service should be done by factory trained or qualified personnel only.
Trouble Cause Remedy
Does not start. (1) Power failure (1)-(3) Contact electric power company; devise counter-measures
Starts, but (2) Large discrepancy between power source and voltage
immediately stops. (3) Significant drop in voltage
(4) Motor phase malfunction (4) Inspect connections and magnetic switch
(5) Electric circuit connection faulty (5) Inspect electric circuit
(6) Faulty connection of control circuit (6) Correct wiring
(7) Blown fuse (7) Replace with correct type of fuse
(8) Faulty magnetic switch (8) Replace with correct type of magnetic switch
(9) Water is not at level indicated by float (9) Raise water level
(10) Float is not in appropriate level (10) Move float to an appropriate starting level
(11) Float defective (11) Repair or replace
(12) Short circuit breaker is functioning (12) Repair location of short circuit
(13) Foreign matter clogging pump (13) Remove foreign matter
(14) Motor burned out (14) Repair or replace
(15) Motor bearing broken (15) Repair or replace
Operates, but stops (1) Prolonged dry operation has activated motor protector (1) Raise stop water level
after a while. and caused pump to stop
(2) High liquid temperature has activated motor protector (2) Lower liquid temperature
and caused pump to stop
Does not pump. (1) Reverse rotation (1) Correct rotation (see Operation 2, (3))
Inadequate volume. (2) Significant drop in voltage (2) Contact electric power company and devise
counter-measures
(3) Operating a 60Hz pump on 50Hz (3) Check nameplate
(4) Discharge head is high (4) Recalculate and adjust
(5) Large piping loss (5) Recalculate and adjust
(6) Low operating water level causes air suction (6) Raise water level or lower pump
(7) Leaking from discharge piping (7) Inspect, repair
(8) Clogging of discharge piping (8) Remove foreign matter
(9) Foreign Matter in suction inlet (9) Remove foreign matter
(10) Foreign matter clogging pump (10) Disassemble and remove foreign matter
(11) Worn impeller (11) Replace impeller
Over current (1) Unbalanced current and voltage (1) Contact electric power company and devise counter-measure
(2) Significant voltage drop (2) Contact electric power company and devise counter-measure
(3) Motor phase malfunction (3) Inspect connections and magnetic switch
(4) Operating 50HZ pump on 60Hz (4) Check nameplate
(5) Reverse rotation (5) Correct rotation (see Operation 2)
(6) Low head; excessive volume of water (6) Replace pump with low head pump
(7) Foreign matter clogging pump (7) Disassemble and remove foreign matter
(8) Motor bearing is worn or damaged (8) Replace bearing
Pump vibrates; (1) Reverse rotation (1) Correct rotation
excessive operating (2) Pump clogged with foreign matter (2) Disassemble and remove foreign matter
noise. (3) Piping resonates (3) Improve piping
(4) Gate valve is closed too far (4) Open gate valve
Single phase motor: (1) Defective start capacitor (1) Replace start capacitor.
Motor hums, but will not (2) Defective relay:
run, over load trips. a) Check relay coil with continuity meter (2a) Replace relay if open coil is found
In approximately 15-20 b) Check for loose or broken connection in relay and (2b) If circuit is intact, replace start capacitor and restart motor
seconds. After an off start capacitor circuit
time of 30-60 seconds, c) If after step (2b) motor fails to start, check with (2c) If no continuity is indicated, replace relay
overload protector will continuity indicator across terminal 162
reclose. If motor again (3) Defective motor; if motor fails to start after replacing (3) Check motor for electrical and mechanical defects
hums and overload trips, relay (start or run capacitor if used), motor may be
the fault is probably due to defective
either a defective start
capacitor or relay, or
perhaps the motor itself.
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Page 9
EBARA Submersible Semi-vortex Sewage Pumps DSU/DSHU
Operating, Installation, and Maintenance
5. Construction
Model DSHU
Hot Water Pumps
1
/
2 to 2HP
PA RT
NO.
001
012
†021
039
048
†111
†115
†117-1
†117-2
†117-3
†117-4
120-1
120-2
130-1
130-2
PART NAME
CASING
SUCTION COVER
IMPELLER
KEY
IMPELLER NUT
MECHANICAL SEAL
O-RING
GASKET
GASKET
GASKET
GASKET (MODEL DSU)
O-RING (MODEL DSHU)
BOLT
BOLTS
SCREW
SCREW
MATERIAL
CAST IRON
304 STAINLESS
CAST IRON
420 STAINLESS
BRASS
—
RUBBER (NBR)
PRESS BOARD
RUBBER (CR or NBR)
RUBBER (NBR)
RUBBER (NBR)
304 STAINLESS
304 STAINLESS
304 STAINLESS
304 STAINLESS
ASTM, AISI
CODE
A48 Class 30
AISI304
A48 Class 30
AISI420
B36 No. 272
AISI304
AISI304
AISI304
AISI304
NO. FOR
1 UNIT
1
1
1
1
1
1 SET
1
1
1
1
1
3 or 4
2
1
3 or 4
PA RT
NO.
193
219
244
801
802
†811
814
816
830
842
848
†849-1
† 849-2
865
915
PART NAME
OIL PLUG
COMPANION FLANGE
STRAINER
ROTOR
S TATO R
SUBMERSIBLE CABLE
MOTOR FRAME
BRACKET
SHAFT
MOTOR COVER
MOTOR PROTECTOR
BALL BEARING
BALL BEARING
HANDLE
EXTERNAL TERMINAL
MATERIAL
BRASS
CAST IRON
STEEL
—
—
—
CAST IRON
CAST IRON
403 STAINLESS
CAST IRON
—
—
—
304 STAINLESS
—
ASTM, AISI
CODE
B36 No. 272
A48 Class 30
A283 Grade D
A48 Class 30
A48 Class 30
AISI403
A48 Class 30
AISI304
—
NO. FOR
1 UNIT
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1~2
†: Recommended spare parts.
Motors purchased as a complete unit.
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Page 10
EBARA Submersible Semi-vortex Sewage Pumps DSU/DSHU
Operating, Installation, and Maintenance
Model DSU
3 to 10HP
Model DSHU
Hot Water Pumps
3 to 5HP
PA RT
NO.
001
005
012
†021
039
080
†107
†111
†115-1
†115-2
†115-3
†117-1
†117-2
†117-3
†117-4
120-1
120-2
120-3
120-4
125
PART NAME
CASING
INTERMEDIATE CASING
SUCTION COVER
IMPELLER
KEY
BUSHING
WEARING RING
MECHANICAL SEAL
O-RING
O-RING
O-RING
GASKET
GASKET
GASKET
GASKET
BOLT
BOLT
BOLT
BOLT
BOLT
MATERIAL
CAST IRON
CAST IRON
CAST IRON
DUCTILE IRON
420 STAINLESS
STEEL
304 STAINLESS
—
RUBBER (NBR)
RUBBER (NBR)
RUBBER (NBR)
PRESS BOARD
RUBBER (NBR)
304 STAINLESS
304 STAINLESS
304 STAINLESS
304 STAINLESS
304 STAINLESS
ASTM, AISI
CODE
A48 Class 30
A48 Class 30
A48 Class 30
A536 GR60-40-18
AISI420
A283 Grade D
AISI 304
AISI304
AISI304
AISI304
AISI304
AISI304
NO. FOR
1 UNIT
1
1
1
1
1
1
1
1 SET
1
1 or 2
1
1
1
1
1
4
4
4
2
1
PA RT
NO.
130
135
174
193
200
244
277
801
802
†811
814
816
817
830
842
848
†849-1
†849-2
915
PART NAME
SCREW
WASHER
DISCHARGE ELBOW
OIL PLUG
LIFTING HANGER
STRAINER
“V” RING
ROTOR
S TATO R
SUBMERSIBLE CABLE
MOTOR FRAME
BRACKET
BRACKET
SHAFT
MOTOR COVER
MOTOR PROTECTOR
BALL BEARING
BALL BEARING
EXTERNAL TERMINAL
MATERIAL
304 STAINLESS
304 STAINLESS
CAST IRON
BRASS
STEEL
STEEL
RUBBER (NBR)
—
—
—
CAST IRON
CAST IRON
CAST IRON
403 STAINLESS
CAST IRON
—
—
—
ASTM, AISI
CODE
AISI304
AISI304
A48 Class 30
B36 No. 272
A283 Grade D
A283 Grade D
A48 Class 30
A48 Class 30
A48 Class 30
AISI403
A48 Class 30
NO. FOR
1 UNIT
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
†: Recommended spare parts.
71/2, 10HP
3 to 5HP
Motors purchased as a complete unit.
Parts No. 915 is not installed for Model DSHU.
Parts No. 117-4 is not installed, No. 115-2 is installed 2
pcs. for 7
1
/2 -10HP.
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Page 11
EBARA Submersible Semi-vortex Sewage Pumps DSU/DSHU
Operating, Installation, and Maintenance
Maintenance and Service
6. Disassembly and Assembly:
Please contact the following for assistance:
EBARA Fluid Handling
Customer Service Manager
1651 Cedar Line Drive
Rock Hill, South Carolina 29730
Other
1. All specifications subject to change without notice
2. Limited warranty:
EIC warrants for a period of twelve months from the date of initial startup or eighteen months from the date of shipment,
whichever shall first occur (the "Warranty Period") the EIC Products to be delivered hereunder against defects in material
and workmanship, under normal use and service when installed, used and maintained in accordance with instructions
supplied by EIC. This is EIC's sole and exclusive warranty. It applies only to EIC Products and specifically excludes Other
Equipment, whether or not such Other Equipment is included in EIC's scope of supply hereunder. Such Other Equipment
is warranted only by its manufacturer. If such a defect appears in EIC Products within the Warranty Period and Purchaser
has given EIC immediate written notice of same, EIC will either repair the part, or at its option replace the part, by shipping
a similar part F.O.B. EIC's shipping point, or at its option refund an equitable portion of the purchase price. EIC may
require the return of the defective part, transportation prepaid, to establish the claim. All costs of removal, reinstallation,
field labor and transportation shall be borne by the Purchaser. No allowance will be made for repairs without EIC's written
consent or approval, and the Warranty Period shall not be suspended upon stopping operation for warranty repairs, nor
recommence upon completion of the warranty repairs, but shall run continuously from commencement until normal
expiration. Repair parts shall carry no greater warranty than the remaining balance of the underlying EIC Product into
which they may be installed, expiring at the same time as said underlying warranty.
Any descriptions of the EIC Products or Other Equipment, any specifications, and any samples, models, bulletins, or similar
material used in connection with this sale are for the sole purpose of identifying the said Equipment and are not to be
construed as express or implied warranties. Unless during the warranty period all repairs or replacements or parts or
components for EIC Products are with EIC-approved parts or components, and all warranty service is performed by EIC
or its authorized distributor or representative, the warranty responsibility of EIC shall immediately terminate.
EIC MAKES NO OTHER WARRANTY OF ANY KIND WHATSOEVER, EXPRESS OR IMPLIED; AND ALL WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED BY EIC AND
EXCLUDED FROM THESE CONDITIONS. The Purchaser's sole and exclusive remedy, whether upon warranty, contract
or tort, including negligence, will be to proceed under this warranty. All liability of EIC shall terminate no later than the
expiration of the Warranty Period.
CAUTION
All service should be done by factory trained or qualified personnel only.
Be sure to cut off power source before beginning disassembly.
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Page 12
Contact your dealer or supplier
for more information about other EBARA products:
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