EBARA CVU User Manual
Submersible Vortex Sewage Pump
Model DVU
Operating Instructions, Installation & Maintenance Manual
EBARA Fluid Handling
EBARA International Corporation
EBARA Submersible Sewage Pumps DVU
Operating, Installation, and Maintenance
EBARA Fluid Handling
www.pumpsebara.com
3
(t) 803 327-5005 • (f) 803 327-5097
rev. 08/10
Contents
Section Page
Safety Information and Introduction ......................................................................................3
Specifications ........................................................................................................................3
Pump Checks ........................................................................................................................4
Installation ..............................................................................................................................4
Operation................................................................................................................................9
Maintenance and Service ....................................................................................................10
Sectional View ......................................................................................................................12
Warranty................................................................................................................................14
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.
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.
Specifications
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 object 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.
CAUTION
Be careful not to exceed the given specifications in the use of your products.
Item Specifications
Type Sewage, waste water, miscellaneous drain water
Liquid handled Temperature Motor: 1 - 10HP : 32 - 122
•
F
Motor: 15 - 30HP : 32 - 104
•
F
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
Maximum water depth 65 ft
Installation with Quick Discharge Connector or floor mounted
EBARA Submersible Sewage Pumps DVU
Operating, Installation, and Maintenance
EBARA Fluid Handling
www.pumpsebara.com
4
(t) 803 327-5005 • (f) 803 327-5097
rev. 08/10
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 between 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.
There are two different types of overload protection. One is MOTOR PROTECTION (AUTO-CUT), that is used for up to
10HP. The pump and motor could still have power to it if AUTO-CUT is kicked out.
The other is THERMAL PROTECTION (MINIATURE THERMAL PROTECTION OR MTP) that is used for 15HP to 30HP.
A MTP cable must be installed in the control circuit.
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.
EBARA Submersible Sewage Pumps DVU
Operating, Installation, and Maintenance
EBARA Fluid Handling
www.pumpsebara.com
5
(t) 803 327-5005 • (f) 803 327-5097
rev. 08/10
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 DVU) 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
H1: Operating water level
This must be above the top of the motor.
H
2
: Lowest water level (motor flange)
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