EBARA DLU Operating and maintenance manual

Submersible Sewage Pump

Model DLU

Model DLMU

Operating Instructions, Installation & Maintenance Manual

EBARA Pumps Americas Corporation

EBARA Submersible Sewage Pumps DLU / DLMU

Operating, Installation, and Maintenance

EBARA Pumps Americas Corporation

www.pumpsebara.com

(t) 803 327-5005 • (f) 803 327-5097

rev. 01/24

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

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.

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 PUMPS AMERICAS CORPORATION.

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: 1/2 - 5HP: 32 - 122••F

Motor: 1/2 - 5HP: 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

*These models are not recommended for use with VFDs

EBARA Submersible Sewage Pumps DLU / DLMU

Operating, Installation, and Maintenance

EBARA Pumps Americas Corporation

www.pumpsebara.com

(t) 803 327-5005 • (f) 803 327-5097

rev. 01/24

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

All electrical work should be performed by a qualified electrician and all national and local electrical codes must

be observed.

CAUTION

MOTOR PROTECTION (AUTO-CUT). The pump could 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.

EBARA Submersible Sewage Pumps DLU / DLMU

Operating, Installation, and Maintenance

EBARA Pumps Americas Corporation

www.pumpsebara.com

(t) 803 327-5005 • (f) 803 327-5097

rev. 01/24

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 DLU, DLMU) 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.

H2: Lowest water level (motor flange)

EBARA Submersible Sewage Pumps DLU / DLMU

Operating, Installation, and Maintenance

EBARA Pumps Americas Corporation

www.pumpsebara.com

(t) 803 327-5005 • (f) 803 327-5097

rev. 01/24

Installation

3. Electrical Wiring:

(1) Wiring

a) Wire as indicated for the appropriate start system as shown in Fig. 3.

b) Loose connections will stop the pump. Make sure all electrical connections are secure.

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.

Manual Operation Type – Single Phase

Output 1 to 5HP

U : RED

V : WHITE

Y : BLACK

G : GREEN

❖Output 1 to 2 HP Model : 3ARR3 FJ10EE3 6×551 (Mfr : GE)

Pick-up : 185-200V

Drop-out : 105-40V

Capacity : 35A

❖Output 3 to 5HP Model : 3ARR3 FJ4EK2 6×555 (Mfr : GE)

Pick-up : 260-275V

Drop-out : 135-60V

Capacity : 35A

❖

EBARA Submersible Sewage Pumps DLU / DLMU

Operating, Installation, and Maintenance

EBARA Pumps Americas Corporation

www.pumpsebara.com

(t) 803 327-5005 • (f) 803 327-5097

rev. 01/24

Manual Operation Type – Three Phase

Model DLU

Output 1HP

208/230V

G : GREEN

U : RED

V : WHITE

W : BLACK

PR : PROTECTOR (AUTO-CUT)

L1: RED

L2: WHT

L3: BLK

G = GREEN

460V

G = GREEN

EBARA Submersible Sewage Pumps DLU / DLMU

Operating, Installation, and Maintenance

EBARA Pumps Americas Corporation

www.pumpsebara.com

(t) 803 327-5005 • (f) 803 327-5097

rev. 01/24

Manual Operation Type – Three Phase

Model DLU

Output 2 - 5HP

208/230V

G : GREEN

U : RED

V : WHITE

W : BLACK

PR : PROTECTOR (AUTO-CUT)

L1: RED

L2: WHT

L3: BLK

460V

EBARA Submersible Sewage Pumps DLU / DLMU

Operating, Installation, and Maintenance

EBARA Pumps Americas Corporation

www.pumpsebara.com

(t) 803 327-5005 • (f) 803 327-5097

rev. 01/24

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 10 HP) or the thermal detector (more than 15 HP) 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 DLU, DLMU

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.

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

EBARA Submersible Sewage Pumps DLU / DLMU

Operating, Installation, and Maintenance

EBARA Pumps Americas Corporation

www.pumpsebara.com

(t) 803 327-5005 • (f) 803 327-5097

rev. 01/24

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 PUMPS AMERICAS CORPORATION representative as soon as possible.

WARNING

Disconnect power cable from power source before servicing unit.

Normal maintenance should be done by qualified personnel.

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.

Oil Capacities for DLU/DLMU pumps

(3) Preventive maintenance yearly

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

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

HP Oil

1 21 ozs

2 31 ozs

3 42 ozs

5 47 ozs

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