EBARA DSC4 User Manual

CT 259-08-09

As informações contidas neste manual poderão sofrer alterações sem prévio aviso.

Manual de Instruções

Modelo DSC4

Depto. Comercial São Paulo

Rua do Rócio, 84, 8º andar
Vila Olímpia - São Paulo - SP
Fone: (11) 2124 7744
Fax: [phone]
e-mail: [e-mail]

Depto. Comercial Recife

Av. Mal. Mascarenhas de Morais, 1776
Loja 04 - Imbiribeira - Recife - PE
Fone: (81) 3087 1190
Fax: [phone]
e-mail: [e-mail]

www.ebara.com.br

Depto. Comercial e Fábrica

Rua Joaquim Marques Figueiredo, 2-31 Bauru - SP
Fone: (14) 4009 0020 / 4009 0000
Fax: [phone]
e-mail: [e-mail]

Assistência Técnica

Rua Joaquim Marques Figueiredo, 2-31 Bauru - SP
Fone: (14) 4009 0024
Fax: [phone]
e-mail: [e-mail]

03

Contents

1. Preface …………………………………………..……….....................….………..

2. Acceptance Inspection ……………………………………......................…...…..

3. Installation ………………………………………..………………......................….

3.1 Foundation ….………………………………..…………........................…..

3.2 Floor Frame ……………………...…………..………………..........………..

3.3 Discharge Elbow Installation ……………………………….….........……..

3.4 Discharge Pipe Installation ...………………...…………..........….………..

3.5 Water Level Switch Installation …………………………….……..........…..

3.6 Check the Following Points (1) Through (6)

Prior to Pump Installation ……………...……………………...….........…..

3.7 Pump Installation ……………………………....…………..…...............…..

3.8 Cable Installation ………………………………………………..............…..

3.9 Floor Plate ……………………………………………..……............…...…..

4. Electric Wiring ………………………………………………….……...............…..

4.1 Power Cable Connection ………………………………….…...........……..

4.2 Grounding ……………………………….…………………...........………...

4.3 Protective Device Cable Connection …………………….............………..

4.4 Water Level Switch Cable Connection …….…………….…............……..

5. Operation ……………………………………………………..............…..………..

5.1 Operational Limitations ………………………………...…............………..

5.2 Checking Rotation Direction …………………………………...........……..

5.3 Cautions for Operation ……………………………….………...........……..

5.4 Operation ……………………………………………….……...........……….

5.5 Cautions During Operation ………………………………............…………

6. Maintenance and Overhaul …………..………………….…...…...............……..

6.1 Daily Checks …………..……………………………………............……….

6.2 Monthly Checks …………..…………………...…………..........…………..

6.3 Annual Checks …………..…………………...…………….……….............

6.4 Overhaul …………..…………………...…….………………..............……..

6.5 Disassembly and Reassembly …………..………..............…….….……..

6.6 Replacing Components …………..………………...…...........….….……..

7. Troubleshooting …………..…...............………………...…….…………….….....

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Page 05
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Page 06
Page 07
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Page 08
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Page 15
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Page 29

INSTRUCTION MANUAL

Model

DSC4

04

INSTRUCTION MANUAL

Model

DSC4

1. Preface

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. Your questions will be promptly answered and your suggestion
may be considered for incorporation into our future products.

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.

Safety Labels

Four different types of safety labels are used in this manual. Please study the labels carefully so
that the meaning of any safety warning you encounter is immediately clear.

DANGER: indicates a potentially hazardous situation which, if not avoided, will result in
death or serious injury.

WARNING: indicates a potentially hazardous situation which, if not avoided,
could result in death or serious injury

CAUTION: indicates a potentially hazardous situation which, if not avoided,
may result in minor or moderate injury or possible damage to the
equipment or machine.

Note: is used to call attention or to emphasize essential information.

2. Acceptance Inspection

Upon arrival of the pump –
(1) Check the nameplate information for agreement with specifi cations in respect to model
identifi cation, head, pumping capacity, speed, output, voltage and frequency.
(2) Check the pump has not been damaged during shipment and all plugs and fastening bolts
properly tightened.
(3) Check accessories and spare parts against the packing list.
If any problem is found, contact your dealer.

29

INSTRUCTION MANUAL

Model

DSC4

7. Troubleshooting

Symptoms Probable Causes Remedies

Pump fails to start • Defective cable or motor.

• Malfunction inside control panel.

• Power source trouble.

• Pump is mechanically locked.

• Defective protector.

• Lifts pump and replace cable or motor.

• Inspection made by competent
electrician.

• Inspection made by competent
electrician.

• Lift pump, inspect and/or overhaul.

• Replace protector.

Pump fails to function
despite motor operation

• System head too high.

• Clogged discharge pipe (Pressure
too high).

• Clogged pump or strainer
(Pressure too low).

• Wrong direction rotation.

• Internal pump wear.

• Valve is closed.

• Recheck requirements.

• Clean discharge pipe.

• Clean strainer or impeller and casing.

• Check and change rotation. Transpose
two of three phase leads at panel.

• Repair and/or replace.

• Check valve operation.

Insuffi cient capacity • Air suction.

• System head too high.

• Clogged discharge pipe.
(Pressure too high)

• Clogged pump or strainer.
(Pressure too low)

• Air accumulation in pipe.

• Internal pump wear.

• Wrong direction rotation.

• Liquid viscosity different from
design value.

• Damaged impeller.

• Raise water level in pump pit.

• Recheck requirements.

• Clean discharge pipe.

• Clean strainer, impeller and bowl.

• Install air vent valve.

• Repair and/or replace.

• Check and change rotation. Transpose
two of the three phase leads at panel.

• Recheck requirements.

• Repair and/or replace

Excessive current • Gravity of pumped liquid greater

than that specifi ed.

• Sand mixed with water.

• Refer to “Pump fails to start”

• Change pump unit.

• Lift the pump and overhaul. Remove
sand in tank.

Vibration and/or noise • Internal pump wear.

• Clogged pump.

• Cavitation or vortex.

• Resonance in pipe line or
foundation.

• Rotating component in contact
with fi xed component.

• Damaged impeller.

• Repair and/or replace.

• Clean pump.

• Raise suction water level. Operate at
proper fl ow rate.

• Repair to change characteristic
vibration.

• Internal pump check.
Repair and/or replace.

• Repair and/or replace.

28

INSTRUCTION MANUAL

Model

DSC4

Fig. 24

(4) Torque table

Table 4

WARNING: WHEN MACHINES SURFACES ARE DAMAGED AND MUST BE REPAIRED, USE
AN APPROPRIATE GRINDER. DURING GRINDING WORK, APPROVED PROTECTIVE GOOGLES
MUST ALSO BE WORN.

Bolt Size

Torque kg.m (Ft.lbs.)

Without anti seized

compound

With anti seized

compound

M8 1.1 (8) 0.8 (6)
M10 2.2 (16) 1.5 (11)
M12 3.8 (28) 2.6 (18)
M16 9.1 (66) 6.2 (45)
M20 17.8 (129) 12.1 (88)
M22 24.0 (174) 16.2 (117)
M24 30.8 (223) 20.9 (151)
M30 61.4 (444) 41.6 (301)
M36 107.0 (774) 72.4 (524)

05

INSTRUCTION MANUAL

Model

DSC4

3. Installation

3.1 Foundation

Place concrete to build up the fl oor and discharge elbow foundations to the values shown in
installation drawing. The discharge elbow foundation must have suffi cient size and strength to
support the weight of the pump body, submersible motor and accessories plugs the weights of
the discharge pipe, and to absorb vibrations and impacts resulting from operation. Usually, it
should weigh more than seven times the pump weight.

3.2 Floor Frame (Fig. 1, 2 and 3)

Install a cable lead-out elbow and a fl oor frame on the fl oor over the pump pit. Attach a guide
pipe holder securely to the fl oor frame with bolts. As the guide pipe must be installed vertically
(with a tolerance of 1mm or less per 1m), carefully check the positional relationship between
the fl oor frame location and the discharge elbow foundation. (See Fig. 1 * )

If the guide pipe holder is attached directly to the concrete, use hole-in anchor bolt as shown
in Fig. 3.

CAUTION: IF THE CABLE LEAD-OUT ELBOW IS TOO SMALL IN DIAMETER, THE CABLE
MAY BE HEATED WHERE IT RUNS THROUGH THE ELBOW.

Motor side

Impeller side

Cable lead-out elbow

*

Fig. 1

Fig. 2 Fig. 3

Hole-in anchor bolt