Grindex Bravo 20 Manual

Operation &

maintenance manual www.grindex.com

BRAVO

SLURRY PUMPS

No: 90 072 01 Revision 1 2005.07

2 (16) • No: 90 072 01 Rev 1 2005.07

Table of contents Page

Installation and use ............................................3

How to read the data plates ................................3

This is how to install your pump........................4

This is how the pump must stand in the sump ...4

Hose ...................................................................5

Cable and power supply .....................................5

Permanent installation ........................................6

Respect limitations .............................................6

Safety and environment .....................................7

Main parts ..........................................................8

Maintenance .......................................................8

Cable entry .........................................................9

Checking the oil level .......................................10

Oil change .........................................................11

Motor housing ...................................................12

Trouble shooting ...............................................13

Pump cable connectors .....................................14

Wiring diagrams ................................................15

Your choice of a submersible pump from Grindex has given you a pump that will serve you well

for a long time to come. Grindex pumps are designed and built for continuous use in hostile work-

ing conditions.

The service life of your Grindex pump will depend to some extent on you.

If you want optimal service for the longest possible time it’s important that you familiarize your-

self with the advice and directions given in these instructions.

With cordial greetings

GRINDEX

Technical Manager

Congratulations on a sound choice!

This GRINDEX pump has no motor protector.

The pump must be supplied with an external Motor starter ﬁtted in the end of the pump cable.

Following Motor starters can be used:

• On/Off switch and thermal overload circuit breaker.

• On/Off switch and thermal overload magnetic circuit breaker.

For connection of motor thermal contacts circuit a Motor starter with following features must be used:

• On/Off switch, thermal overload magnetic circuit breaker and integrated thermal monitoring

system.

The thermal overload circuit breaker must conform to the rated current and motor input power of

actual pump.

After connection to power, always check that direction of rotation of motor is correct!

Box 538 S-136 25 Haninge SWEDEN www.grindex.comU

Before use seeoperators manual

Ø 3 Ic/s~TYPE

NETHERLANDS

MADE IN THE

PmaxVQmaxHz20mHmaxAl/smNokg

ModelPump type No.Rated voltageRated currentNumber of phases

and frequency

Serial No.WeightMaximum power consumptionMaximum pressure headMaximum flow capacityMaximum submersion depth

accordance withtechnical dataexternal motorprotection inThis pump mustbe used withStart reactionRotation

3 (16) • No: 90 072 01 Rev 1 2005.07

How to read the data plates

If you need further technical data please refer to the

relevant data sheets.

Safety Precautions.

All electrical work should be performed by an authorized electrician. Follow local safe-

ty regulations and observe recommended safety precautions.

All electrical equipment must be earthed. This applies to both pump and equipment.

Before starting work on the pump, make sure that the pump is isolated from the power

supply and can not be energized. Be sure to disconnect the power supply before attempt-

ing inspection, as pump may start automatically. Respect limitations, see page 6.

Attention!

Before the pump is installed in the sump check the

direction of rotation. Start reaction is counter clock-

wise and rotation of motor is clock-wise when the

pump is viewed from top. See arrows on data plate of

pump.

WARNING!

The start reaction of motor can be powerful!

Installation and use

Read this manual before installing the pump.

Check that you have received the right type of pump and that the pump data corresponds

with what you ordered. The simplest way to do this is to check the particulars on the data

plate, which you will ﬁnd on the pump. The rated voltage, rated current and maximum

power consumption are particularly important. On the bases of these particulars you should

check that you have the right power supply, motor controller and fuse arrangement.

123

4 (16) • No: 90 072 01 Rev 1 2005.07

This is how the pump must stand in the sump

To attain maximum capacity and to prevent excessive wear, the pump should be positioned

in one of the following ways so that it doesn’t burrow itself into sand or clay.

This is how to install your pump

Connect the pump to power. If rotation of motor is wrong shift two phases.

(Shift two phases in the power supply terminal or in the CEE plug, or turn the knob on phase shifter).

If the pump still doesn’t start: Call a qualiﬁed electrician and ask him to check the mains and the junctions.

WARNING!

Swich off the current before installing or moving

the pump. Make sure that suspension brackets,

shackles and their means of attachment are undam-

aged. Before installing the pump attach a chain or

wire to the suspension bracket and use it to lower

the pump into the sump and lift it out again.

Place the pump on a ﬁrm base which prevents

it from sinking down or tilt over.

Hang the pump freely

by a chain or wire

Except for the pump the following

components are necessary:

1. Hose connection, which is fastened to the pump

2. Flexible hose

3. Lifting chain

Checkpoints before operating:

• Do not let the pump bury itself in the mud.

• Do not leave a large loop of the cable in the sump,

as the pump may eventually damage it.

• Check that the motor is adequately cooled. The

motorhousing should be at least 2/3 submerged

for continuous operation at full load (see Hmin.1 Fig.)

• It is good practice, whenever possible, to keep the

motorhousing completely under water.

• For choosing the discharge, pipe/hose inner diameter

to avoid sedimentation, the following minimum criti-

cal velocities can be used as a guide.

• Contaminated water containing ﬁne sand, the velocity

should exceed 2,5 m/s.

• Water and larger solids in suspension, the velocity

should exceed 3,5 m/s.

WARNING!

Never use the cable for lifting or lowering the pump.

5 (16) • No: 90 072 01 Rev 1 2005.07

Hose

Kinks in the hose will reduce the pump capacity.

Cable and power supply

Having the right cable and handling it properly will

save you from many malfunctions.

WARNING!

If the cable sheath is damaged and the cable is

lowered into the water, water may enter into the

junction chamber of the pump. If the cable is

damaged it has to be replaced.

Treat the electrical equipment with care. This will

prevent both malfunctions and accidents.

• Make sure that junctions don’t get into the water.

• Don’t lay the starting equipment directly on the ground.

WARNING!

If persons are likely to come into physical

contact with the pump or pumped media (liq-

uid), for example on construction sites or farms

etc, the earthed (grounded) socket must have

an additional earth- (ground-) fault protection

device (GFI) connected. When pumping near a

lake (beaches, ponds and fountains etc) a safety

distance of at least 20 meters (65ft) between the

person and the pump is applicable.

• If you use an extension cable, see that it is

correctly dimensioned. The longer the cable,

the greater the conductor cross-section you will

need in order to avoid voltage drop.

• Strong sunlight can also cause voltage drops.

• If you’re drawing your power from your

own generator it’s important that it is correctly

dimensioned. Do not use the Generator setting

Auto idle function.

If your cable is too long,

don’t coil it up, since this

could cause voltage drop.

6 (16) • No: 90 072 01 Rev 1 2005.07

Permanent installation

1. Submersible slurry pump

2. Overﬂow alarm

3. Level control equipment with ﬂoat switches

4. Hose

5. Non-return valve

6. Lifting tackle

• The pump must not be submerged to more

than 20 metres/65 feet. IP-68.

• The temperature of the medium must not

exceed 40°C/103°F.

• The pH-value should be between 4 and 10.

• The voltage drop in operation must not exceed

5 %.

• Maximum numbers of starts per hour:

15 evenly spread.

• Maximum cable lengths.

Excessively long cables cause voltage drops

that can result in malfunctions.

• By using a cable of greater conductor cross-

section you reduce the voltage drop and can

therefore increase the cable length.

• Pressure losses.

Long or unnecessarily small-bore hoses give

substantial pressure losses.

Respect limitations

In order to decide what pump would be best for

a permanent installation you will need to know

the following:

• Type of medium (sludge, abrasive, corrosive, etc.)

• Inﬂow of liquid

• Head

• Desired pump capacity

• Size of the pump sump

• Size and length of discharge pipe, number

of bends and valves, etc., for calculation of

WARNING!

The pump should not be used in explosive or

ﬁre-risk conditions or for pumping inﬂammable

liquids.

WARNING!

Don’t go near rotating parts of the pump.

7 (16) • No: 90 072 01 Rev 1 2005.07

In this manual

General warning

Danger!

Electrical hazard!

Danger of physical injury

Rotating parts!

On the pump

Danger of physical injury

Rotating parts!

Electrical hazard!

EC-conformity symbol

General safety instructions

• The pumps must be secured and prevented from

rolling during transportation.

• Approved equipment must be used for lifting

and lowering the pump.

• Only trained and authorized personnel may

install and maintain the pump after carefully

reading this manual.

• Only use the pump for its intended purpose and

under the regulated circumstances.

• Don’t go near rotating parts.

• Clean the pump before maintenance and inspec-

tion.

• Observe the local regulations when working

with agressive, corrosive, toxic, and/or chemi-

cals.

• Never remove safety signs, keep them clean.

• Always connect to a protective grounded circuit.

• Before maintenance and inspection always

disconnect the pump from the power supply.

• Use a proper hoist for lifting and handling the

pump.

• Do not leave a large loop of cable in the sump,

as the pump may eventually damage it.

• Never drop the loose cable end in water.

The water may enter the cable and ﬁnally enter

the motorhousing, eventually causing motor

failure.

Environment

Parts which are replaced during repair, maintenance

or renewal, could contain materials which could be

harmful to the environment.

Please take care in the disposal of these parts.

Do this in accordance with the local environmental

regulations.

Safety and environment

8 (16) • No: 90 072 01 Rev 1 2005.07

Main parts

Always disconnect the pump from the electical power before inspection or disassembly.

The motor housing can be hot when the pump is just switched off.

Ensure that the pump is fully supported

to prevent it from falling over !

Maintenance

Check the oil every 6 months or 500 running hours

If there is more than a few cm3 water in the oil chamber, contact your dealer.

Change the oil every year or when it is no longer transparant.

1 Pump casing

2 Impeller

3 Agitator

4 Discharge outlet

5 Motor housing

6 Rotor unit

7 Stator

8 Shaft

9 Bearings

10 Mechanical shaft seal (2x)

11 Oil chamber

12 Oil screw

13 Cable entry

14 Cable

15 Cover

16 Main cover

17 Terminal board

9 (16) • No: 90 072 01 Rev 1 2005.07

When the pump has been in use for a long time,

the compression of the rubber cable seal might be

diminished, which can cause leakage. By screwing-in

the cable entry the seal will be retensioned.

Bravo 20, 30, 40

• Unscrew the 2 hexagon socket screws (1).

• Remove the cable clamp (2).

• Turn the hexagon head of the entry (3) clockwise,

using the right tool, so far that it is possible to replace

the cable clamp again.

• Screw-in the 2 hexagon socket screws (1).

It is possible that your pump is ﬁtted with only 1 cable.

Bravo 50, 60

• Unscrew the 4 hexagon socket screws (1) from the

outer cable entries.

• Remove the cable clamps (2).

• Turn the hexagon heads of the entry clockwise, using

the right tool, so far that it is possible to replace the

cable clamps again.

• Screw-in the 4 hexagon socket screws (1).

It is possible that your pump is ﬁtted with only 1 cable.

Cable entry

10 (16) • No: 90 072 01 Rev 1 2005.07

Bravo 20, 30, 40

• Put the pump in a horizontal position so that 2 hexa-

gon socket screws are on top and one at the bottom.

• Unscrew the level plug (1) and the vent plug (2).

• The oil level should be at the lower side of the open-

ings (see drawing). By turning the pump a bit this

should be visible.

• If not so, ﬁll up to the right level.

Always use the right kind of oil!

Bravo 50, 60

• Put the pump in a vertical position.

• Unscrew the M20 oil pug (1) which can be found at

the opposite side of the cable entry box.

• The oil level should be at the lower side of the

opening. If not so, ﬁll up to the right level.

Always use the right kind of oil!

Checking the oil level

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