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
kW
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

11 (16) • No: 90 072 01 Rev 1 2005.07
Bravo 20, 30, 40
• Put the pump in a horizontal position so that the
drain plug (3) is at the bottom.
• Remove the vent plugs (1) and (2).
• Put a receiving bin underneath the drain plug.
• Remove the plug and drain the oil.
• Replace the drain plug.
• Refill the oilhousing. The oil level should be at the
lower side of the openings.
• Replace the plugs.
Bravo 50, 60
• Put the pump in a horizontal position so that the
drain plug (M20) is at the bottom.
• Remove the vent plugs (1) and (2).
• Put a receiving bin underneath the drain plug.
• Remove the plug and drain the oil.
• Replace the drain plug (3).
• Refill the oilhousing through the opening (1). The
oil level should be at the lower side of the opening.
Oil change
Note!
Collection, storage and removal of the oil should be done according to the regulations of the local authorities.
When necessary replace the sealing rings.
Always use the right kind of oil! See spare parts list.

12 (16) • No: 90 072 01 Rev 1 2005.07
Bravo 20, 30, 40
• Place the pump in a vertical position and remove
the 4 hexagon socket screws of the motorhousing.
• Lift the motor unit very carefully a few cm’s, see fig.
If water is present this will come out this way.
A small amount of water, due to condensation, is
permissible. More water is an indication of leak-
age of the construction. Oil is an indication of seal
failure between motorhousing and oil chamber.
If so, contact your dealer.
Bravo 50, 60
• Place the pump in a vertical position and remove
the 4 hexagon socket screws (1) of the cable entry
box cover (2) and check the entry box.
• Remove the 4 hexagon socket screws (1) of the
cable entry box and pull the cable entry box a few
cm’s from the pump.
If water is present this will come out this way.
A small amount of water, due to condensation, is
permissible. More water is an indication of leak-
age of the construction. Oil is an indication of seal
failure between motorhousing and oil chamber.
If so, contact your dealer.
Motor housing

13 (16) • No: 90 072 01 Rev 1 2005.07
Safety
When working on the motor, make sure
that the power is switched off.
When starting the pump, ensure nobody
goes near rotating parts.
Trouble shooting list
Problem
Pump does not start
Pump starts and
stops repeatedly
Current too high
Pump runs but
no flow or too
low flow
Possible cause
No voltage on motor
terminals
Motor failure
Fault in power supply
Motor overloaded
Motor overheated
Fault in power supply
Pump failure
Clogging or air lock
Pump failure
Fault in power supply
Too low capacity
Required action
Check power supply
Check motor protection
Check motor wiring
Check power supply
Check pump
Check cooling
Check motor
Check power supply
Check pump
Check dicharge and
coupling
Check pump
Check power supply
Check discharge
Checkpoints
• No power
• Main isolator switch
• Fuses
• Earth leakage relay
• Motor protection relay
• Motor temperature
• Continuity and isolation
• Phase resistance
• Low voltage
• Not all 3 phases available
• Setting of motor protection
• Wrong direction of rotation
• Impeller blocked
• Protection in automatic reset mode
• Continuity and isolation
• Fuses
• Low voltage
• Impeller blocked
• Visc. or spec. gravity too high
• Wrong direction of rotation
• Discharge obstructed
• Valve fully or partly closed
• Air pocket in pump or discharge
• Coupling leaks
• Impeller or volute blocked
• Pump is sucking to much air
• Worn or broken impeller
• Controlpanel
• Fuses
• Low voltage
• Discharge obstructed
• Valve fully or partly closed
• Air pocket
Trouble shooting
Attention!
• When working on the pump, make sure it cannot
start unexpectedly!
• Only qualified electricians may do the
electrical work.
Observe local electrical and safety regulations!

6
5
U1
V2
U2
W2
2
4
W1
V1 3
1
T
Bravo 20,30,40 DOL
U1
TBN
BU
BK
W1
V2
U2
V1
6
5
3
4
2
W2 1
U1
BN
T
BU
BK
W1
V2
U2
V1
BU
BN
BK
BU
W2
BN
BK
7x2.5mm2
7x2.5mm2
4x2.5mm2
4x6mm2/
3x6mm2+3x1.5mm2/
BN=brown
BU=blue/Grey
GN/YE=green/yellow
BK=black
1-2-3=U1-V1-W1 C1=thermal contact
C2=thermal contact
C3=not used
A=ground
4-5-6=W2-U2-V2
BN
BU
BU
BK
BK
BN
3x6mm2+3x1.5mm2
T
W1
W2 U1
V2 V1
U2
3x16mm2+3x2.5mm2
4x16mm2
3x6mm2+3x1.5mm2
Bravo 50,60Bravo 20,30,40 Y/D
6
5
4
3
2
1U
V
T
W
T
W
V
U
T
T
BK
BU
BK
G/Y
BK
BN
BU T
T
1
2
3
5
6
4
W1
V1
U1
W2
U2
V2
G/Y
BU
BN
BK
BU
BN
BK
BN
BU
BK
T
T
W1
U1
V1
W2
U2
V2
G/Y
G/Y
G/Y
G/Y
G/Y
G/Y
= The 4th conductor is split up in 3 parts, These 3 parts should be used as ground
core. thay have the same total cross section area as the none split core
BN
BU
BN
U2
W2
V2
U2
W2
V2
X=Connect the cable leads in GRINDEX external starter according to this sequence.
(x)
(x)
14 (16) • No: 90 072 01 Rev 1 2005.07
DOL
Y / D
Pump cable connectors

15 (16) • No: 90 072 01 Rev 1 2005.07
Wiring diagrams
NOTE
The overcurrent protection should be set to AUTO. The tripping current should be max. the rated
current of the pump. Note that the scales for direct online and star/delta are different. The Y/D over-
load relay should be set at phase current = 0,58 x line current. The Y/D time relay should be set at 3s.

Notes
16 (16) • No: 90 072 01 Rev 1 2005.07
Grindex AB Box 538 SE-136 25 Haninge Sweden
Tel:[phone] Fax:[phone]
e-mail: [email protected] www.grindex.com