EBARA DL User manual

CF3208U-H002 REV.0
EBARA CORPORATION.
- 1 -
EBARA
Submersible Sewage Pumps
Model DL
Model DL with cutter
Instruction Manual
To the personnel of installation works
The Instruction Manual shall be handed to the user who conducts operation, maintenance, and
inspection of the pump.
Contents
(page) (page)
１Warning indication.......................................2
７Maintenance..............................................13
２Precautions of safety...................................3
1. Daily inspection ...................................14
３Introduction..................................................5
2. Regular inspection...............................14
1. Confirmation of pump and auxiliaries.. 5
3. Precautions during stop-operation ......15
2. Confirmation of nameplate.................... 5
4. Consumables.......................................15
４Product specification................................... 6
5. Action when protective device is activated
...................................................................15
５Installation .................................................8
1. Confirmation before installation.............8
８Troubleshooting ........................................17
2. Installation .............................................8
９Structure.........................................................18
3. Electric wiring......................................10
1. Sectional view ...........................................18
６Operation...................................................12
10 Disassembling and Assembling................19
1. Before starting.....................................12
11 Limited Warranty.......................................19
2. Test operation .....................................12
12 Repair and after-sale service....................20
3. Test operation ..................................... 13
4. Operation.............................................13
Request
Welcome to the EBARA submersible sewage pump. EBARA fabricated the pump with special care for
assuring safe handling. Since, however, mal-operation of the pump may induce accident, correct use of
the pump referring to the instruction manual is requested.
The Instruction Manual shall be stored at a place allowing ready reference.
This operational instruction manual
shall be handed to the user.
D7

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1
Warning indication
The precautions given here are to assure safe and correct operation of the pump and to prevent
injury of you and other people, and damage of facilities. The precautions are classified to "Warning"
and "Caution" for the details of danger and damage expected to arise in case of mal-handling of the
pump in terms of the magnitude and the urgency of injury and damage. Since both the "Warning"
and the "Caution" describe serious matter relating to safety, the contents shall be observed in any
case.
Description of the indication
Terms of warning
Description
Warning
Wrong handling expects to raise a danger resulting in death or serious injury of
the operator.
Caution
Wrong handling expects to raise a danger resulting in slight injury of the
operator or sole physical damage.
Note
Providing specific precautions or specifically emphasizing information.
Description of symbol
Forbidden (not allowed to execute)matter.
Detail forbidding contents are instructed in or near the symbol by a sketch or a
sentence.
Compulsory (forceful execution) matter.
Detail compulsory contents are instructed by a sketch of a sentence given near
the symbol.

EBARA CORPORATION.
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2
Precautions of safety
Warning
On handling and installation work of the pump, assure safety by confirming the mass and
the shape of the pump referring to the appearance this instruction manual, drawing, the
catalogue, and other materials. There are dangers of dropping the pump and the injury of
worker.
Never execute the operation of the pump and the mounting work of parts in a lifted
position. That type of work is dangerous causing dropping of the pump and injury of
worker.
Do not damage, break, machine, forcefully bend, stretch, or twist the power cable, bind
the power cable into a bundle, or place a heavy load on the power cable. Those kinds of
handling cause fire and electric shock.
Execute correct wiring work by a qualified technician conforming to the appropriate legal
standards. Wrong wiring by non-qualified worker is illegal and may induce electric shock
and fire.
Do apply grounding wiring. The Green and Yellow stripe cord or the Green cord is the
grounding line. Never connect the Green and Yellow stripe cord to the power source
because there is a possibility of electric shock in case of trouble or electric leak.
To prevent electric shock, install an exclusive use ground fault breaker. The electric leak
may cause electric shock and fire.
If any dust is attached to a blade or blade-attaching face of the power source plug, fully
wipe the dust off with a dry-cloth. The attached dust may cause fire.
During operation of the pump, do not insert hand or foot in the suction opening of the
pump to avoid injury at the rotary section.
Never operate the pump in water in the presence of personnel.
If electric leak occurs, the personnel may suffer electric shock.
Disassembling, repairing, and modifying the pump shall be limited to a repair technician.
There is a possibility of injury caused by electric shock, ignition, abnormal functioning,
trouble, etc.
Before entering inspection and repair, cut OFF a power source at a main disconnect
device which is equipped with an operating handle which is lockable in OFF position.
There is a possibility of electric shock and of injury caused by sudden start of the pump in
automatic operation mode.
To stop operation for a certain period, cut OFF the power switch.
Deterioration of insulation may cause electric shock, electric leak, and fire.
The user of a standard model shall refer to the columns of standard specification. Do not
use the pump at outside the range of the specification in terms of handling liquid,
installing site, power source, etc. Operation at outside the specification may cause pump
trouble, injury, electric shock, electric leak, and fire.
Do not execute dry operation in air. That type of operation causes deterioration in
insulation to lead to electric shock and electric leak.
If the insulation resistance decreases to 1MΩ or less, immediately cut OFF the power
switch, and request the inspection and repair of the pump to the supplier or EBARA
CORP. There is a possibility of motor burn out, electric shock, and fire.
Confirm non-loosening at the wirings of motor, at the primary and secondary terminals of
control panel, and at the connection and wiring terminals of the power devices in the
control panel. Remove dust from these sections. Imperfect connection of wiring caused
by loosening and attached dust may cause ignition resulting in fire.
Do not attach parts other than EBARA's standard products, and do not modify EBARA's
products. There is a possibility of electric shock and ignition, or injury caused by abnormal
functioning, break, etc. Furthermore, there may fail in performing normal functioning.

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Warning
The handling and installation work of the pump shall be done only by a qualified
technician in accordance with the applicable legal standards. Unless follow the rule, the
work becomes illegal and there is a possibility of inducing accident such as fire and injury.
Mount a ground fault breaker exclusive to the pump. Recommended one is a wiring
ground fault breaker equipped with an electric leak alarm. There is a possibility of electric
shock and fire.
This submersible pump must be equipped with a main disconnect device in accordance
with requirements of appropriate legal standard (EN60204-1, clause 5.3.2). A suitable
rating over current protective device also needs to be provided in the final installation.
It is recommended to use a circuit breaker as main breaker that is suitable for isolation
according to appropriate legal standard (EN60947-2) and is equipped with an operating
handle which is lockable in OFF position and complies with the other requirements of
appropriate legal standard (EN60204-1, clause 5.3).
Caution
Do not operate a pump of 50Hz at 60Hz. The operation at wrong frequency induces break
of pump and other devices caused by excess pressure and motor burn-out caused by
overload.
Do not operate a pump of 60Hz at 50Hz. The pump performance deteriorates.
The pump cannot be used for food processing, food transportation, and other food-
relating uses. There is a possibility of generation of various bacteria and of inclusion of
foreign matter.
Do not use the pump at facilities for organisms (fish farm, fish preserve, aquarium, etc.)
There is a possibility of extinction of organisms caused by leak current or by leakage of
enclosed liquid from mechanical seal.
Do not use the pump at an important facility (computer cooling apparatus, cooling
apparatus for refrigerator, etc.)
Since machining oil, rubber-releasing agent, and foreign matter, used in pump-production
line, enter the handling liquid, operation of the pump shall be done after fully flushing the
pump to confirm the absence of foreign matter, depending on the facility.
Limit the handling liquid to water. Do not handle oil, seawater, organic solvent, etc. other
than water because these liquids cause trouble of pump to result in electric leak and
electric shock.
The pump is a submersible sewage pump. Do not operate the pump for a long period of
time or under vigorous startup-shutdown conditions. Such operations may lead to liquid
leak from mechanical seal to induce trouble of the pump within a short period of
operation.
If the pump failed to operate or if there occurred abnormality, immediately cut OFF the
power switch to prevent accident, and give request to the supplier or EBARA CORP. for
inspection and repair. Wrong operation and work may induce accident.
Install a stand-by pump preparing for an accidental stop of the operating pump. There is a
possibility of suspension of water supply to stop the facilities.
Consumable parts shall be regularly replaced. If the deteriorated or worn parts are used,
they may lead to serious troubles of water leak, seizing, and break of pump parts. For
regular inspection, parts replacement, and related works, request the work to the supplier
or EBARA CORP.
Do not lay the water level signal cable and the power cable in a single conduit. There is a
possibility of mal-functioning resulting from noise.
Assure the tightening of connection screws at the electric-conduction section. There is a
possibility of heat generation, trouble, and burn-out.

EBARA CORPORATION.
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3
Introduction
On receiving the pump, promptly check the following items.
1. Confirmation of pump and accessories
1) Confirm non-occurrence of damages and of loosening of bolts and nuts, which may be generated
during transportation.
2) Confirm the presence of full-set of accessories.
(For the standard auxiliaries, refer to the section of 9 "Structure". )
２．Confirmation of nameplate
1) The nameplate gives basic specification of the pump. Confirm the specification of your pump on the
nameplate. Specifically, care shall be paid on the frequency (50 Hz or 60 Hz).
Caution
Do not operate a pump of 50Hz at 60Hz. The operation at wrong frequency
induces pump break caused by excess pressure and motor burn-out caused by
overload.
Do not operate a pump of 60Hz at 50Hz. The pump performance deteriorates.
Fig. 1 Indication on nameplate
Model of motor
Pump name
Capacity (Unit: L/min)
Number of phases of Motor
Total head (Unit: m)
Rated output (Unit: kW)
Rated frequency (Unit：Hz)
Rated voltage (Unit: V)
Number of motor poles
Rated current (Unit：A)
Class of insulation
Maximum ambient temperature
(Unit: °C)
Company name
Manufacturing date
Code number
Degree of protection
Maximum operating depth

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4
Product specification
For the performance of your pump, refer to the nameplate in terms of total head (HEAD), discharge rate
(CAP.), rated voltage (V), rated current (A), etc. Other specifications are listed in the following table.
Warning
The user of a standard model shall refer to the columns of standard specification.
Other than the standard model, a modified specification is available as a special
specification on request of the user. Do not use the pump at outside the range of
the specification, such as handling liquid, installing site, and power source.
Operation at outside the specification may cause pump trouble, injury, electric
shock, electric leak, and fire.
Mount a ground fault breaker exclusive to the pump. Recommended one is a
wiring breaker equipped with an electric leak alarm. There is a possibility of
electric shock and fire.
Caution
The pump cannot be used for food processing, food transportation, and other
food-relating uses. There is a possibility of generation of various bacteria and of
inclusion of foreign matter.
Do not use the pump at facilities for organisms (fish farm, fish preserve, aquarium,
etc.) There is a possibility of extinction of organisms caused by leak current or by
leakage of enclosed liquid from mechanical seal.
Do not use the pump at an important facility (computer cooling apparatus, cooling
apparatus for refrigerator, etc.)
Since machining oil, rubber-releasing agent, and foreign matter, used in pump-
production line, enter the handling liquid, operation of the pump shall be done
after fully flushing the pump to confirm the absence of foreign matter, depending
on the facility.
Limit the handling liquid to water. Do not handle oil, seawater, organic solvent,
etc., other than water. These liquids cause trouble of pump to result in electric
leak and electric shock.
The pump is a submersible sewage pump. Do not operate the pump for a long
period of time or under vigorous startup-shutdown conditions. Such operations
may lead to liquid leak from mechanical seal to induce trouble of the pump within
a short period of operation.
Install a stand-by pump preparing for an accidentally stop of the operating pump.
There is a possibility of suspension of water supply to stop the facilities.

EBARA CORPORATION.
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■Standard specification
Handlin
g liquid
Liquid property
Liquid temperature
Liquid containing foreign matter
(PH 5-9, concentration of residual free chlorine: 10mg/L or less,
Concentration of chlorine ion: 200mg/L or less)
0-40°C：Non-automatic type
Size of
foreign
matter
Max. (mm)
Diameter of
spherical
shape (mm)
(Bore DIA.)
Φ65 -----------------------35
Φ80,Φ100(80) ---------50
Φ100 ---------------------60
(Bore DIA.)
Φ150-------------70
Φ200-------------76
Φ250-------------82
Φ300-------------90
Length of
fibrous shape
(mm)
(Bore DIA.)
Φ65 -----------------------195
Φ80,Φ100(80) ---------240
Φ100 ---------------------300
(Bore DIA.)
Φ150-------------400
Φ200-------------500
Φ250-------------550
Φ300-------------600
Max. submersible depth of the pump
Refer to Fig.1
Pump
Structure
Impeller
Shaft seal
Bearing
Non-clog
Single coil-double mechanical seal(1.5kW~3.7kW)
Tandem double mechanical seal(5.5kW~22kW)
Sealed ball-bearing (inside the motor)
Material
Casing
Impeller
Shaft seal
Sealed liquid at
shaft seal
FC200
FC200 or FCD400
SiC/SiC：sliding material at liquid side
Ceramics-carbon: sliding material at motor side
NBR：rubber material
Turbine oil ISO VG 32
Motor
*1,*2
Model, number of poles,
Thermal class
Phase, frequency, voltage,
current
Built-in protective device
Dry submersible type, refer to Fig.8
Refer to Fig.8
7.5kW or less: Auto-cut
11kW or larger: Thermal protector
Material
Frame
Main shaft
Cable
FC200
SUS403
200V：Only1.5kW H07RIV-F / To7.5kW VCT / From11kW 2PNCT
400V：H07RIV-F
Connection with piping
Flange
Environment of installation site
free from corrosive gas and vapor
Installation method
Vertical position
Mass of pump
Refer to Fig.8
Direction of rotation
Clock wise from top of motor
Flow, Head
Refer to Fig.8
Temperature of shipping, store
keeping
-5~40°C
*1 Cannot be driven by the inverter.
*2 Allowable range of voltage fluctuation is ±10 ％. Allowable range of frequency
fluctuation is ±1％. Allowable simultaneous fluctuation of voltage and frequency is 10%
as the sum of the absolute values of them. For both cases, however, the characteristics
and the temperature rise of motor are independent of the rated values.

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5
Installation
1. Confirmation before installation
Measurement of insulation resistance
Measure the insulation resistance between the ground and the grounding wire and between
phases using a megger in a state that the motor and the cables (excluding the power source
connection section) are immersed in water. If the insulation resistance at the respective sections
is 20MΩ or more, there is no problem. During the measurement, keep the power source
connection section of cables distant from the ground.
2. Installation
Warning
On handling and installation work of the pump, assure safety by confirming the
mass and the shape of the pump referring to the appearance this instruction
manual, drawing, the catalogue, and other materials. There are dangers of
dropping the pump and the injury of worker.
Never execute the operation of the pump and the mounting work of parts in a
lifted position. That type of work is dangerous causing dropping the pump and
injury of workers.
Do not damage, break, machine, forcefully bend, stretch, or twist the power
cable, bind the power cable into a bundle, or place a heavy load on the power
cable. Those kinds of handling cause fire and electric shock
The handling and installation work of the pump shall be done only by a
qualified technician in accordance with the applicable legal standards. Unless
follow the rule, the work becomes illegal and there is a possibility of inducing
accident such as fire and injury.
Note
Apply repair painting at an interval depending on the use environment. Depending on the
use environment, there may be generated rust at threaded sections, machined sections
with rust-proof coating, rust-proofing sections, etc.
1) On transporting and installing the pump, never apply tension to the cables. Those works shall be
done by attaching chain or rope to the handle.
2) The pump cannot be operated in horizontal position and in lifted position. Operate the pump at
vertical position on a base.
3) Install the pump at a place of free from turbulence in the tank, as far as possible. For a pump
equipped with a float, select the place of installation of the pump so as to avoid direct hitting of the
flowing-down liquid to protect the float.
4) If there is a flow in the tank, support the pipe at an adequate position, (refer to Fig. 2).
5) Avoid the generation of air-pocket in the pipe.
6) Do not immerse the discharge end of the pipe in water. Immersed end of the pipe induces
backflow on stopping the operation of the pump.
7) Apply a sewage check valve to every pump.
8) Since non-Automatic type pump (Model DL) has no Automatic operation device which is actuated
by a float in the pump, care shall be given to the pump operating water level. If that type of pump
is operated continuously for 10 minutes or longer period at near the operable minimum water level,
the Auto-cut in the motor is actuated. Therefore, the Automatic operation device shall be installed
as illustrated in Fig. 3, and the stop-operation water level shall be set at a position higher than the
operable minimum water level to avoid dry operation. The operation-start water level shall be set
to a position higher than the level of fully immersing the pump.

EBARA CORPORATION.
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Fig.3
Note
Limit the continuous operation time at the operable minimum water level to 10
minutes. Operation longer than 10 minutes actuates Auto-cut in the motor to
stop the operation of the pump.
9) Mounting a full-water alarm in the tank is recommended. The alarm panel and the float switch for
water-level control are available from EBARA CORP.
10) When an electrode is used in the Automatic operation unit, care shall be paid not to entangle dirt
around the electrode rod or not to adhere oil to the rod. Those phenomena may induce error in
functioning.
11) Installation of an attaching-detaching device shall conform to the instruction manual “Quick
Discharge Connector".
12) For automatic pumps (DLA), install the floats as shown in Fig. 4. The pump may not start if a
float switch touches the wall of the water tank or the piping. Install the float so that this will not
happen.
13) Models DLA and DLJ will undergo automatic alternate operation only when they are paired.
Position the floats for these automatic alternate operation pumps (DLJ) as shown in Fig. 5. The
pumps may not operate correctly if the floats are in the wrong position.
Note
Packing materials after installation, and wasted lubricant oil and grease, and parts after
inspection and repair shall be transferred to a qualified waste-treatment contractor observing
the applicable laws and the regional regulations.
Caution
Install a stand-by pump preparing for an accidental stop of the operating pump.
There is a possibility of suspension of water supply to stop the facilities.
Fig. 2
Pipe
support
Sewage
check valve
Inlet
Suspens
ion wire
Attach the end of
the wire near the
manhole.
Install this pipe joint near
the manhole.
Use a ground fault
breaker
Power
supply
Fig. 4
Operating water level
Stop water level
The float must not be placed
lower than this position.
250(0.4kW,0.75kW) 320(0.5kW～3.7kW)
Fig. 5
Pump No. 1
(DVJ type)
Pump No. 2
(DVA type)
30 mm or more
80 mm or more

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3.Electric wiring
Warning
Execute correct wiring work by a qualified technician conforming to the
applicable legal standards. Wrong wiring by non-qualified worker is illegal and
may induce electric shock and fire.
Do apply grounding wiring. The Green and Yellow stripe cord or the Green
cord is the grounding line. Never connect the Green and Yellow stripe cord or
the Green cord to the power source because there is a possibility of electric
shock in case of trouble or electric leak.
To prevent electric shock, install an exclusive use ground fault breaker. The
electric leak may cause electric shock and fire.
If any dust is attached to a blade or blade-attaching face of the power source
plug, fully wipe the dust off with a dry-cloth. The attached dust may cause fire.
Confirm non-loosening at the wirings of motor, at the primary and secondary
terminals of control panel, and at the connection and wiring terminals of the
power devices in the control panel. Remove dust from these sections.
Imperfect connection of wiring caused by loosening and attached dust may
cause ignition resulting in fire.
This submersible pump must be equipped with a main disconnect device in
accordance with requirements of appropriate legal standard (EN60204-1,
clause 5.3.2). A suitable rating over current protective device also needs to
be provided in the final installation.
It is recommended to use a circuit breaker as main breaker that is suitable for
isolation according to appropriate legal standard (EN60947-2) and is equipped
with an operating handle which is lockable in OFF position and complies with
the other requirements of appropriate legal standard (EN60204-1, clause 5.3).
Caution
Assure the tightening of connection screws at the electric-connection section.
There is a possibility of heat generation trouble and burn-out.
Do not lay the water level signal cable and the power cable in a single conduit.
There is a possibility of mal-functioning resulting from noise.
Execute correct power source work of motor and wiring work by a qualified technician conforming to the
applicable legal standards. Wrong wiring and grounding work by non-qualified worker is illegal and very
dangerous. To prevent electric shock, install a ground-fault breaker exclusively for this products.
MOTOR
L1
PE
Yellow/Green
Black 1 Black 2 Black 3
PE L2 L3
U1 V1 W1
0
L1
PE L2 L3
PE
2Yellow/Green
Black 1 Black 2 Black 3 Black 2 Black 3 Black 1
Brown
Thermal protector cable
Light blue
U1 V1 W1 W2 U2 V2
MOTOR
L1
PE L2 L3
PE
0
2Yellow/Green
Black 1 Black 2 Black 3 Black 2 Black 3 Black 1
Brown
Thermal protector cable
Light blue
U1 V1 W1 W2 U2 V2
MOTOR
ELECTRICAL WIRING FOR
PUMP UP 7.5kW
(Cable for 4wirees)
400V Class
ELECTRICAL WIRING FOR PUMP FROM 11kW TO 22kW
(2 Cable for 4wirees + Cable for 2wirees)
DELTA STRATING STAR/DELTA STRATING
400V Class

EBARA CORPORATION.
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Thermal Protection
Contact rating
AC230V, 13A (Max)
AC200V-6mA or DC12V-10nA (Min)
Contact type
Break Contact
(Normal: on, At temp. rise: OFF)
Contact Cable
2 cores PVC, Cab-tyre Cable 1mm2
Brown, Light Blue (non-polarity)
3-phase
Grounding
Green
E
Black
W
White
V
Red
U
3-phase
Black
Y
White
X
Red
Z
200V
3-phase
Grounding
Green/Yellow
PE
Black 3
W1
Black 2
V1
Black 1
U1
3-phase
Grounding
Green/Yellow
PE
Black 3
U2
Black 2
W2
Black 1
V2
400V
1)Wiring
Perform the wiring shown in Fig.6. After doing so, make sure that the pump’s cable is securely
connected to the panel’s terminals.
2)Cable
a) Never immerse the cable end in water.
b) If a cable is extended by connecting other cable, do not immerse the connected section in water.
c) Support the cable by the discharge pipe using an adhesive tape, a PVC band, etc.
d) Lay the cables with care to avoid overheating. Overlap winding or direct exposure to sunray
may cause overheating.
3)Grounding
a)For 3-phase, grounding shall be done using Green cord (Label E) Or Green and Yellow stripe
cord (Label PE) or the Green cord (Label E) among the four lines, as shown in Fig. 7. Never
connect the Green and Yellow stripe cord or the Green cord to the power source. The grinding
shall be surely conducted conforming to the Technology Standard of Electric Facilities.
b)For the cases of long cable or other situations, the ground fault breaker is actuated in spite of
fully grounding of motor, checked by a megger. The phenomenon occurs from an electrostatic
capacity between the cable and the ground. Specifically, a rush current at start of pump likely
induces the actuation of the ground fault breaker. In that case, the ground fault breaker shall be
the one having low sensitivity of sensitive current. On adopting the ground fault breaker with low
sensitivity of sensitive current, care shall be given to electrical safety by assuring grounding, etc.
4) Motor protection
a) Auto-cut
The motor (standard model of 7.5kW
or less) has a built-in Auto-cut that
covered from overload, short cooling
and etc.
Fig.6
Fig.2
Fig.7
Fig.2
MOTOR
L1
PE
Green
Red
White
Black
PE L2 L3
U
EV W
MOTOR
0
L1
PE L2 L3
PE
Green
UV W ZX Y
Thermal protector cable
Red
White
Black
Red
White
Black
White
Black
0
L1
PE L2 L3
PE
Thermal protector cable
MOTOR
Green
Red
White
Black
Red
White
Black
White
Black
UV W ZX Y
200V Class
200V Class

- 12 -
b) Thermal protector
The motor (standard 11kW or larger and special model of 2.2kW~7.5kW) has a built-in thermal
protector that outputs signals via a cable. Connect the thermal protector cable’s wires to the
control panel in accordance with the specifications in the table on the right, so that the pump will
be stopped if the motor’s internal temperature rises too high.
Use this protector in combination with a 3E relay or similar for phase failure.
6
Operation
Warning
During the operation of the pump, do not insert hand or foot in the suction opening of
the pump to avoid injury at the rotary section.
Never operate the pump in water in the presence of personnel.
If electric leak occurs, the personnel may suffer electric shock.
Do not execute dry operation in air. That type of operation causes deterioration in
insulation to lead to electric shock and electric leak.
1. Before starting
1) After completing the installation work, measure again the insulation resistance in accordance with
５-1 "Confirmation before installation".
2) Confirm that the water level is satisfactory. If the pump is operated for a long period of time under dry
condition or at near the operable minimum water level, the Auto-cut in the motor is actuated. If the
situation is repeated, the pump life becomes short. Once the Auto-cut is actuated, the motor does not
start until it is cooled. (Even during the period of Auto-cut functioning, the power is supplied up to the
pump. Since the pump will restart without indication, the inspection shall be given after cut OFF the
power source.)
3) Operate the pump within the range given in the chart.
4) Frequent start-stop operations damage the pump in early stage of life. Limit the starting frequencies
as below.
Motor out put
Less than 7.5kW
11~22kW
Frequencies of starting
Ten times per hour
Six times per hour
2. Test operation …Non-automatic type pump (Model DL)
…Automatic type pump (Model DLA)
1) Turn the switches 1 - 2 on and off a couple of times
with the gate valve slightly opened to check that it
starts up normally. It should be noted that a DLA
model pump does not start unless the upper float is
positioned up.
2) Next, check the direction of rotation. Reverse direction of rotation is indicated by low capacity and
abnormal noise and vibration. If the pump is found to be running in reverse rotation, change
around the onnections of 2 of the 3 phases to obtain the regular rotation direction (See Fig. 8).
Fig. 5
Switch box
Motor
Motor
U1
V1
W1
W1
V1
U1
Switch box
Fig. 8

EBARA CORPORATION.
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3. Test operation …Automatic alternate type pumps (DLJ)
Check automatic alternate operation of pumps No. 1
(DLJ) and pump No. 2 (DLA) as follows (See Fig. 9).
1)When the water level reaches pump No. 1 start level,
pump No. 1 will start and water will be pumped until pump
No. 1 stop water level is reached. At this point the
automatic alternate operation circuit built into pump No. 1
will stop the pump. The water level will now be at pump
No. 2 start level. Pump No. 2 will start and pump water
until its stop water level is reached. The process is
repeated when the water level is again at pump No. 1 start
level.
2)If the water flowing into the water tank exceeds the amount being pumped by pump No. 2 (abnormal
water increase) and the water level rises to pump No. 1 abnormal start water level, pump No. 1 will
start to operate. The two pumps will then be operating simultaneously in parallel operation.
* Check the direction of rotation for each pump using the same measure described in (2) of 2 while
the pump is operating.
3)Once the direction of rotation is verified, gradually open the gate valves to check for abnormal
conditions in pressure, discharge quantity, current value, etc., referring to ８“Troubleshooting.”
Do not operate the pump with the gate valve fully closed.
4. Operation
After the test operation is completed, the pumps are now ready for operation.
Note
Operate the pump at a discharge rate suitable for the facilities.
(Operation at excessively small or large capacity causes noise and vibration, and
consumes unnecessary power.)
7
Maintenance
Warning
Disassembling, repairing, and modifying the pump shall be done only by a repair
technician.
There is a possibility of electric shock, ignition, or injury caused by abnormal
functioning, break, etc.
Do not attach parts other than EBARA's standard parts, and do not modify
EBARA's standard products. Use of other than the standard parts may result in
electric shock, ignition, or injury caused by abnormal functioning or break, or may
fail to perform normal functioning.
Before entering inspection and repair, cut OFF a power source at a main
disconnect device which is equipped with an operating handle which is lockable in
OFF position. There is a possibility of electric shock and of injury caused by
sudden start of the pump in automatic operation mode.
To stop operation for a certain period, cut OFF the power switch.
Deterioration of insulation may cause electric shock, electric leak, and fire.
If the insulation resistance decreases to 1MΩ or less, cut immediately OFF the
power switch, and request the inspection and repair of the pump to the supplier or
EBARA CORP. There is a possibility of motor burn-out, electric shock, and fire.
Pump
No. 1
stop water
level
Pump No. 2
stop water level
Pump No. 1
abnormal start
water level
Pump No. 2 start
water level
Pump No. 1
start water
level
Fig.9
8

- 14 -
Caution
If there occurred abnormality such as failing in starting, immediately cut OFF the
power switch to prevent accident, and request the inspection and repair to the
supplier or EBARA CORP. Mal-operation or wrong work may induce accident.
Consumable parts shall be regularly replaced. If the deteriorated or worn parts
are used, they may lead to serious failures of water leak, seizing, and break of
pump parts. For regular inspection, parts replacement, and related works, request
the matter to the supplier or EBARA CORP.
If inspection of pressure, discharge rate, voltage, current, etc. finds any difference from those of normal
state, the phenomenon is a sign of accident. Therefore, it is important to give quick action to the matter
referring to ８"Troubleshooting". To do this, keep daily operational record. Preparation of a standby
pump is recommended to respond to an accident.
Note
The table of standard pump performance is available from EBRA CORP.
1. Daily inspection
1)Check current and ammeter fluctuation every day. If ammeter fluctuation is significant even it is
within the limit of pump rating, the pump may have caught foreign matter.
2)If the discharge rate showed a sudden decrease, foreign matter may have clogged the suction
opening.
2. Regular inspection
1) Once a month
Measure the insulation resistance. If the insulation resistance is 1MΩ or more, there occurs no
problem on operating the pump. If, however, a sudden drop appeared in the insulation resistance
even if the value is at or above 1MΩ, the phenomenon is abnormal, and repair of the pump is
required.
2) Once every six months
Replace oil in the mechanical seal chamber at every six months. If
water enters the oil to give significant cloudiness, replace the
mechanical seal. As illustrated in Fig. 7 oiling shall be done at a
specified quantity while the oiling plug faces upright and the pump is
positioned horizontally. After the oiling, fully tighten the plug with a
seal washer.
3) Once a year
Replace mechanical seal at an interval of one year or 6000 hours of total operating hours, either
shorter one. By the replacement, the pump life extends.
4) Once every two to five years
Overhaul of the pump assures safe and long period of operation. For the case of high frequency of
operations, early overhaul is requested.
Fig. 7
Fully tighten the
plug after oiling at a
specified quantity.

EBARA CORPORATION.
- 15 -
3. Precautions during stop operation
1)When the pump is left underwater in stop-operating state, measure the insulation resistance of motor
intermittently. If there is no abnormality in the insulation resistance, operate the pump to prevent the
sliding section of the pump from rusting. When the pump is entered restarting, the procedure shall
conform to ６"Operation".
2)When the pump is stored on ground, clean the pump and then store it at a dry site. (temperature of
storage: -5~40°C) On reusing the pump, follow the instructions of ５"Installation" and ６
"Operation".
4. Consumables
1) Replace the parts when they enter the following-described condition.
Consumable
parts
Mechanical
seal
Sheet
packing
Seal washer
Lubricant oil
O-ring
Power relay
Float switch
Symptoms
or
approximate
period for
replacement
Oil in the
mechanical
seal
chamber
becomes
cloudy.
At every
disassembly
for
inspection.
At every oil
replacement.
Lubricant
becomes
cloudy or
blackish.
At every
disassembly
for
inspection
Every 20000
cycles of
operation
Every
100000
cycles of
operation
Expected
replacement
time
One year or
6000 hours
of total
operating
hours, either
of shorter
one.
Once every
six months.
The above-given replacement time is a standard under normal operation.
Parts name
Output
1.5kW
2.2kW
3.7kW
5.5kW
7.5kW
11kW
15kW
18.5kW
22kW
Mechanical
seal
Φ25
Φ30
Φ40
Φ45
Seal washer
Φ11.8×Φ22(inner dia. × outer dia.) Nominal W12(SUS)
Lubricant oil
(Turbine oil)
For the quantity of oil, refer to the appearance dimensional drawing.
Oil seal
VC68x90x7
VC75x100x7
O-ring
Φ3×
Φ150
Φ3×Φ170
Φ3×Φ180
Φ3×φ220
For detail of Model, etc. of individual parts, inquiry shall be given to the supplier or EBARA CORP.
5. Action when protective device is activated
1）When thermal protector is activated:
Investigate the cause of the activation, take measures to eliminate the cause, then restart operation.
Thermal Protection
Contact rating
AC230V, 13A (Max)
AC200V-6mA or DC12V-10nA (Min)
Contact type
Break Contact
(Normal: on, At temp. rise: OFF)
Contact Cable
400V:2 cores YZW, Cab-tyre Cable 1mm2. Blue Brown, (non-polarity)
200V:2 cores 2PNCT, Cab-tyre Cable 1.25mm2. White Black,(non-polarity)

- 16 -
2）When leakage detector is activated
Lift the pump out and set upright. Remove the plug of the
leakage detector’s chamber and drain the oil and water to a
container. Then clean the inside the leakage detector’s
chamber and motor chamber, and replace the mechanical
seal as well as gaskets and O-rings.
Leakage Detector
Contact rating
AC280V, 0.5A AC50VA
Contact type
Break Contact
(Normal: on, At temp. rise: OFF)
Contact Cable
2 cores H07RIV-F ,Cab-tyre Cable
1.0mm2. Blue,Brown (non-polarity)

EBARA CORPORATION.
- 17 -
8
Troubleshooting
Trouble
Cause
Remedy
Pump does not
start, or starts
but immediately
stops.
- Float movement is obstructed.
- Power failure has occurred.
- Excessive imbalance in power supply
voltage.
- Excessive voltage drop.
- Phase interruption.
- Faulty connection in power circuits.
- Error in control circuit wiring.
- Blown fuse.
- Faulty magnet switch.
- Level switches are malfunctioning or faulty.
- Electrical leakage breaker activated.
- Foreign matter trapped in pump.
- Motor burned out.
- Motor bearings worn out.
- Mechanical seal locked.
- Remove the obstructions.
- Contact electric power company.
- Contact electric power company.
- Contact electric power company.
- Check wiring connections and magnetic switch.
- Check power circuits.
- Correct wiring error.
- Replace with fuse of correct capacity.
- Replace with item of correct specification.
- Replace or repair.
- Perform repair at location of leakage.
- Eliminate foreign matter.
- Replace or repair.
- Replace or repair.
- Replace or repair.
Operates, but
stops after a
while.
- Prolonged dry operation has activated automatic
cut-off function.
- High liquid temperature has activated automatic
cut-off function.
- Raise stop water level.
- Lower liquid temperature.
Thermal
protector
activates.
- Liquid temperature is high.
- Pump is run in air for prolong time.
- Overcurrent
- Lower liquid temperature.
- Raise stop water level.
- Refer to the column for overcurrent.
Flood-sensing
device
activates.
- Mechanical seal leaks.
- No longer serviceable.
- Replace the mechanical seal.
(Liquid quality and operation conditions need to
be reviewed.)
- Replace the mechanical seal.
Pumping not
effected, or
insufficient
pumping
capacity.
- Pump running in reverse rotation.
- Gate valve is damaged.
- Excessive voltage drop.
- 60 Hz pump used with 50 Hz.
- Discharge head too high.
- Piping loss too large.
- Water level too low, air drawn in.
- Discharge pipe leaking.
- Discharge pipe clogged.
- Foreign matter in suction inlet.
- Pump interior clogged with foreign matter.
- Impeller(s) worn out.
- Obtain regular rotation (Refer to ６-2. (2)).
- Inspect and repair.
- Contac electric power company.
- See nameplate for frequency.
- Rethink system plan.
- Rethink system plan.
- Raise water level or lower pump’s position.
- Inspect and repair.
- Unclog pipe.
- Remove foreign matter.
- Disassemble pump and eliminate foreign matter.
- Replace impeller(s).
Overcurrent
occurs.
- Excessive voltage imbalance between supply
phases.
- Excessive voltage drop.
- Phase interruption.
- 50 Hz pump used with 60 Hz.
- Pump running in reverse rotation.
- Head too low. Water flow rate too high.
- Foreign matter trapped in pump.
- Motor bearing worn out.
- Contact electric power company.
- Contact electric power company.
- Check connections and magnet switch.
- See nameplate for frequency.
- Obtain regular rotation (Refer to ６-2. (2)).
- Turn down the gate valve. If there is no gate
valve, replace the pump with the lower head
pump.
- Disassemble pump and eliminate foreign matter.
- Replace or repair.
Vibration
excessive or
noise.
- Pump running in reverse rotation.
- Foreign matter trapped in pump.
- Piping resonating.
- Obtain regular rotation (Refer to ６-2. (2)).
- Disassemble pump and eliminate foreign matter.
- Make improvements in piping to stop resonance.

- 18 -
9
Structure
1. Cross sectional view
* For automatic alternate operation model only
No.
Parts name
Quantity
No.
Parts name
Quantity
001
CASING
1
174
DISCHARGE ELBOW
1
005
INTERMEDIATE CASIN
1
193
OIL PLUG
1
012
SUCTION COVER
1
200
LIFTING HANGER
1
021
IMPELLER
1
213
AIR VENT VALVE
1
039
KEY
1
801
ROTOR
1
080
BUSHING
1
802
STATOR
1
111
MECHANICAL SEAL
1 SET
811
SUBMERSIBLE CABLE
1
115-1
O-RING
1
814
MOTOR FRAME
1
115-2
O-RING
1
816
BRACKET
1
115-3
O-RING
1
817
BRACKET
1
117-1
GASKET
1
830
SHAFT
1
117-2
SEAL WATER
1
849-1
BALL BEARING
1
120-1
BOLT
3 or 4
849-2
BALL BEARING
1
120-2
BOLT
4
876
MOTOR PROTECTOR
1
120-3
BOLT
4 or 8
*902
CONTROL UNIT
1
120-4
BOLT
4
*909-1
FLOAT SWITCH
1
120-5
BOLT
2
*909-2
FLOAT SWITCH
1
125
BOLT
1
*910
FLOAT SUPPORT
1
135
WASHER
1
・Accessories
Ground nameplate············· 1 sheet
Note
Drawings indicating the materials of individual parts are available from EBARA
CORP.

EBARA CORPORATION.
- 19 -
10
Disassembly and Reassembly
Refer to the cross sectional drawing.
1. Disassembling
1) Remove the locking bolts on the casing. Lift the motor section. Then, remove the rotating section
of the pump.
2) Remove the impeller bolt (125), and remove the impeller (021).
3) Remove the oiling plug(193), and collect the lubrication oil.
4) Remove the locking bolts on the intermediate casing (005). Remove the intermediate casing (005)
with special care.
(Care shall be paid on removing the intermediate casing (005) because the residual lubrication oil
in the mechanical seal chamber is discharged.)
5) Remove the mechanical seal (111) with special care not to damage the sliding face of the
mechanical seal and the motor shaft.
2. Assembling
Assembly work shall be conducted in reverse steps to those of the disassembly work. The O-ring and
gaskets shall be replaced with new ones.
(Note 1) On reassembling, when the mounting of impeller, Step 2), completed, rotate the impeller
with hands to confirm smooth rotation. If the rotation is not smooth, repeat the steps of 3) to 5).
(Note 2) On tightening the impeller bolt, apply adhesive for thread, (Locktight #262) to the bolt for
preventing loosening of the bolt.
(Note 3) After completing the reassembling work to Step 1), rotate the impeller by hands (inserting
hands from the suction opening), and confirm the smooth rotation of the impeller without contacting
with the suction cover. Then, enter the operation of the pump.
11
Limited Warranty
EBARA Corporation warrants to the original retail purchaser (“Customer”) the followings.
(1) This warranty valid for a period of twelve months from the date of delivery.
(2) During the said period, EBARA will repair the pump free of charge provided that:
the trouble is due to shortcomings in design, workmanship, etc., that can be attributed to EBARA,
and that the pump was being operated correctly and in a normal manner in accordance with the
Instruction Manual when the trouble occurred.
EBARA takes full responsibility to repair the pump including parts necessary for replacement,
however, EBARA do not take any other damages caused by the trouble.
(3) Fees will be charged for repair and consumable items in the following circumstances:
(a) If the trouble occurs after the warranty has expired.
(b) If the trouble is caused by mal-operation, and/or caused during storage.
(c) If the trouble is caused by fire, flood, earthquake or other circumstances beyond EBARA’s
control.
(d) If the trouble is caused by use of parts other than those recommended by EBARA.
(e) If the trouble is caused by repair or remodeling of the pump carried out by a party other than
EBARA or agent specified by EBARA.
(f) “Consumable items”refer to lubrication oil, gasket, seal washer, O-ring, mechanical seal,
and other parts that will eventually require replacement.
(4) EBARA’s liability shall not extend to any other costs beyond the above.
(5) The storage period of consumable items is 7 years after manufacturing stop.

- 20 -
12
Repair and After-sale service
If some failures are found ,please contact EBARA Corporation or an authorized Agent/Distributor, stating the
data on the identification nameplate and detail of the trouble.(Refer to section ８”Troubleshooting”)
Note
Packing materials after installation, and wasted lubricant oil and grease, and parts after
inspection and repair shall be transferred to a qualified waste-treatment contractor
observing the applicable laws and the regional regulations.
If you have any enquires about the pump, please contact EBARA.
<Singapore>
Ebara Engineering Singapore Pte. Ltd. Website: www.ebara.com.sg
E-mail: [e-mail]
<Malaysia>
Ebara Pumps Malaysia Sdn. Bhd. Website: www.ebara.com.my
E-mail: s[email protected].my
<Indonesia>
P.T. Ebara Indonesia Website: www.ebaraindonesia.com
E-mail: [e-mail]
<Thailand>
Ebara (Thailand) Limited Website: www.ebara.co.th
E-mail: [e-mail]
<Philippines>
Ebara Pumps Philippines,inc. Website: www.ebaraphilippines.com
E-mail: pum[email protected]om
<China>
Ebara Machinery (China) Co., Ltd. Website: www.ebara.cn
E-mail: em[email protected]
<Other countries>
Ebara Corporation (Japan)
Standard Products Business Office Website: www.ebara.co.jp/en