Grindex MINEX Maintenance manual

Installation, care and maintenance
MINEX www.grindex.com
No: 89 73 73 Revision 02 2008.04

Installation, care and maintenance Minex
2
Guarantee
Grindex undertakes to remedy faults in products
sold by Grindex provided:
— that the fault is due to defects in design, ma-
terials or workmanship;
— that the fault is reported to Grindex or Grin-
dex’s representative during the guarantee
period;
— that the product is used only under condi-
tions described in the care and maintenance
instructions and in applications for which it is
intended;
— that the monitoring equipment incorporated in
the product is correctly connected;
— that all service and repair work is done by a
workshop authorized by Grindex;
— that genuine Grindex parts are used.
Hence, the guarantee does not cover faults
caused by de cient maintenance, improper
installation, incorrectly executed repair work or
normal wear and tear.
Grindex assumes no liability for either bodily
injuries, material damages or economic losses
beyond what is stated above.
Grindex guarantees that a spare parts stock will
be kept for 10 years after the manufacture of
this product has been discontinued.
The manufacturer reserves the right to alter
perfor mance, speci cation or design without
notice.
Guarantee ___________________2
Data plate interpretation ________2
Safety precautions _____________3
Product description ____________4
Applications _____________________ 4
Motor data ______________________ 4
Dimensions and weights ____________ 5
Performance curves _________ 6-7
Transportation and storage ______8
Installation __________________8
Electrical connections _______ 9-12
Operation __________________13
Care and maintenance ________14
Safety precautions _______________ 14
Inspection _____________________ 14
Recommended inspections _______ 15-16
Changing the oil _________________ 17
Removing the impeller __________ 18-19
Installning the impeller and setting
clearance ____________________ 19-20
Tools ______________________21
Service log _________________21
Contents
Data plate interpretation
F
E
G
C
KA
JS
H
D
R
B
M
L
N
O
Q
P
I
Data plate interpretation
A Pump model
B Serial No.
C Rated voltage
D Maximum height
E Direction of impeller rotation
F Direction of start reaction
G Rated current
H Maximum capacity
I Degree of protection
J Maximum submersion depth
K Pump type No.
L Frequency
M Phases, type of current
N Rated shaft power
O Thermal class
P Locked rotor code letter
Q Country of origin
R Maximum power consumption
SWeight

3
Installation, care and maintenance Minex
Safety symbols
Following symbols are used in
this manual:
For electrical related warnings.
Safety precautions
For all other warnings.
Precautionary measures
In order to minimize the risk of accident in con-
nection with service work, the following rules
should be followed:
1. Before starting work on the pump, make sure
that the pump is isolated from the power sup-
ply and cannot be energized.
2. Bear in mind the risk of accidents. Make sure
that the machine or parts of the machine can-
not roll or fall over and injure people or dam-
age property.
3. Make sure that the lifting equipment can han-
dle the weight you want to lift and that it is in
good condition.
4. Don't work under suspended load.
5. Carry out the work on a sturdy workbench.
6. Bear in mind the danger of electrical acci-
dents.
7. Check that tools and other equipment are in
good condition.
8. Bear in mind health hazards. Observe strict
cleanliness.
9. When carrying out repair work take care to
avoid injury by cutting or pinching.
10.Make sure you have a rst-aid box near at
hand.
Follow all other health and safety regulation, lo-
cal codes and ordinances.
Safety regulations for the
owner/operator
All government regulations, local health and
safety codes shall be complied with.
All dangers due to electricity must be avoided
(for details consult the regulations of your local
electricity supply company).
Unilateral modication and
spare parts manufacturing
Modications or changes to the unit/installation
should only be carried out after consulting with
Grindex.
Original spare parts and accessories authorized
by the manufacturer are essential for compli-
ance. The use of other parts can invalidate any
claims for warranty or compensation.
Recycling
Local and/or private laws and regulations regarding
recycling must be followed. If there are no laws or
regulations, or the product is not accepted by an aut-
horized recycling company, the product or it’s parts can
be returned to the nearest Grindex sales company or
service workshop.
WARNING!
Is used when there can be a
risk to cause severe injury to
people, death or considerable
damage to property.
CAUTION!
Is used when there will be or
is a risk to cause smaller inju-
ry to people, or smaller dam-
age to property.
NOTE!
Is used to pay intention to installation, use,
operation or service information that is im-
portant but not involved with any risk.
This manual contains basic information on the
installation, operting and maintenance and
should be followed carefully. It is essential that
these instructions are carefully read before
installation or commisioning by both the
installation crew as well as those responsible
for operation or maintenance. The operating
instructions should always be readily available at
the location of the unit.
DANGER!
Is used when there will be a
risk to cause severe injury to
people, death or considerable
damage to property.

Installation, care and maintenance Minex
4
Product description
Applications
Minex is intended to be used for:
— pumping of water which may contain abrasive
particles.
The pumps are available in the following
versions: 1 - 3 phase.
Liquid temperature: standard version, max.
40°C (104°F).
Liquid density: max. 1100 kg/m3(9.2 lb per US
gal.).
The pumped liquid may contain particles up to
a size which corresponds to the openings in the
strainer. See drawing.
The pH of the pumped liquid: 5 – 8.
Depth of immersion: max. 20 m (65 ft).
For other applications contact your nearest
Grindex representative for information.
WARNING!
The pump may not be used
in an explosive or ammable
environment or for pumping
ammable liquids.
WARNING!
If the pump run dry or snore,
the pump surface and the sur-
rounding liquid may be hot.
Bear in mind the risk of burn
injuries.
WARNING!
The machine is not to be
installed in locations classied
as hazardous in accordance
with the national electric code,
ANSI/NFPA 70-1990
Vol-
tage
V
Rated
cur-
rent
A
Star-
ting
cur-
rent A
220 D 4.8 20
230 D 4.7 21
380 Y 2.8 12
400 Y 2.7 12
415 Y 2.7 13
500 Y 2.1 9
550 Y 2.1 10
3~ 50 Hz, 2740 r/min
Rated output: 1.2 kW (1.6 hp)
Max cons. 1.6 kW (2.1 hp)
Vol-
tage
V
Rated
cur-
rent
A
Star-
ting
cur-
rent A
220 D 5.4 29
230 Y// 5.2 27
380 Y 3.1 17
460
Yser
2.6 14
480
Yser
2.6 14
575 Y 1.8 9.9
600 Y 2.0 10
3~ 60 Hz, 3365 r/min
Rated output: 1.4 kW (1.9 hp)
Max cons. 1.8 kW (2.4 hp)
Motor data
Motor type: Squirrel-cage 1- or 3-phase in-
duction motor for 50 Hz and 60 Hz markets.
Vol-
tage
V
Rated
cur-
rent
A
Star-
ting
cur-
rent A
220 7.4 31
230 7.2 32
240 7.2 34
1~ 50 Hz, 2870 r/min
Rated output: 1.3 kW (1.8 hp)
Max cons. 1.6 kW (2.1 hp)
Vol-
tage
V
Rated
cur-
rent A
Star-
ting
cur-
rent A
115 12 49
220 6 23
230 5.8 24
240 5.7 26
1~ 60 Hz, 3410 r/min
Rated output: 1.0 kW (1.3 hp)
Max cons. 1.3 kW (1.8 hp)
Vol-
tage
V
Rated
cur-
rent
A
Star-
ting
cur-
rent A
115 15 74
1~ 60 Hz, 3460 r/min
Rated output: 1.3 kW (1.8 hp)
Max cons. 1.6 kW (2.1 hp)
Vol-
tage
V
Rated
cur-
rent A
Star-
ting
cur-
rent A
220 5.3 19
230 5.1 20
240 5.1 21
1~ 50 Hz, 2785 r/min
Rated output: 0.85kW (1.15 hp)
Max cons. 1.1 kW (1.5 hp) Vol-
tage
V
Rated
cur-
rent
A
Star-
ting
cur-
rent A
220 8.4 35
230 8.2 37
240 8.2 39
1~ 60 Hz, 3460 r/min
Rated output: 1.3 kW (1.8 hp)
Max cons. 1.6 kW (2.1 hp)

5
Installation, care and maintenance Minex
Dimensions and weights

Installation, care and maintenance Minex
6
Performance curves
Each pump is tested in accordance with ISO 9906.
Minex 1-phase, 50 Hz Minex 3-phase, 50 Hz
10
20
30
50
40
60
0
2.0
1.8
1
P [hp] / [kW]
Head [feet] / [m]
Capacity [l/s] [usgpm]
30 60 90 120 150 180
1.6
1.4
0 2 4 6 8 10
0
2
4
6
8
10
12
14
16
18
1.0
1.2
1.4
10
20
30
50
40
60
0
2.0
1.8
1
P [hp] / [kW]
Head [feet] / [m]
Capacity [l/s] [usgpm]
30 60 90 120 150 180
1.6
1.4
0 2 4 6 8 10
0
2
4
6
8
10
12
14
16
18
1.0
1.2
1.4
0.85kW
0.85kW
1.3kW
1.3kW

7
Installation, care and maintenance Minex
Minex 1-phase 60 Hz Minex 3-phase 60 Hz
10
20
30
50
40
60
0
2.0
1.8
1
P [hp] / [kW]
Head [feet] / [m]
Capacity [l/s] [usgpm]
30 60 90 120 150 180
1.6
1.4
0 2 4 6 8 10
0
2
4
6
8
10
12
14
16
18
1.0
1.2
1.4
10
20
30
50
40
60
0
2.0
1.8
1
P [hp] / [kW]
Head [feet] / [m]
Capacity [l/s] [usgpm]
30 60 90 120 150 180
1.6
1.4
0246810
0
2
4
6
8
10
12
14
16
18
1.0
1.2
1.4
1.6
12
20
1.3kW
1.0kW
1.3kW
1.0kW

Installation, care and maintenance Minex
8
Installation
Pump installation
Run the cables so that they do not have any
sharp bends and are not pinched.
Connect the discharge connection and motor
cable. See “Electrical connections”.
Lower the pump into the sump.
Place the pump on a base which will prevent it
from sinking into a soft sump bottom. Alternati-
vely, the pump can be suspended by its lifting
handle just above the sump bottom.
NOTE!
Where required by local au-
thorities an acceptable motor-
circuit switch or other discon-
necting device shall be provid-
ed at the time of installation.
NOTE!
At certain installations and
operation points on the pump
curve the noise level 70 dB,
noise level specied for the
actual pump, can be exceeded.
Transportation and storage
The pump may be transported and stored in a
vertical or horizontal position. Make sure that it
cannot roll or fall over.
WARNING!
Always lift the pump by its
carrying handle or lifting eyes,
never by the motor cable or
the hose.
WARNING!
Before starting to work on the
pump or moving the pump,
make sure that the pump is
isolated from the power sup-
ply and cannot be energized.
This applies to the control cir-
cuit as well.
The pump is frostproof as long as it is operating
or is immersed in the liquid. If the pump is taken
up when the temperature is below freezing, the
impeller may freeze. The pump shall be operated
for a short period after being taken up in order
to expel all remaining water.
A frozen impeller can be thawed by allowing the
pump to stand immersed in the liquid for a short
period before it is started. Never use a naked
ame to thaw the pump.
For longer periods of storage, the pump must be
protected against moisture and heat. The impel-
ler should be rotated by hand occasionally (for
example every other month) to prevent the seals
from sticking together. If the pump is stored for
more than 6 months, this rotation is mandatory.
After a long period of storage, the pump should
be inspected before it is put into operation. Pay
special attention to the seals and the cable entry.
Follow the instructions under the heading “Be-
fore starting”
WARNING!
Make sure that the pump can-
not roll or fall over and injure
people or damage property

9
Installation, care and maintenance Minex
Electrical connections
All electrical work shall be carried out under the
supervision of an authorized electrician.
Local codes and regulations shall be complied
with.
Check that the mains voltage and frequency
agree with the specications on the pump data
plate.
NOTE! For safety reasons, the earth (ground)
lead should be longer than the phase and moni-
toring leads. If the motor cable is jerked loose
by mistake, the earth (ground) lead should be
the last lead to come loose from its terminal.
This applies to both ends of the cable.
Make sure that the pump is correctly earthed
(grounded).
When the pump is connected to the public mains
it may cause icker of incandescent lamps when
starting. In this case the supply authority should
be notied before installing the pump.
WARNING!
All electrical equipment must
be earthed (grounded). This
applies to both pump equip-
ment and any monitoring
equipment. Failure to heed
this warning may cause a le-
thal accident. Make sure that
the earth (ground) lead is cor-
rectly connected by testing it.
NOTE!
Make sure that the monitoring
equipment incorporated in the
product is correctly connected
and in use.
WARNING!
If the pump is equipped with
automatic level control or con-
tactor unit, there is a risk of
sudden restart.
WARNING!
Bear in mind the risk of elec-
trical shock if the electrical
connections are not correctly
carried out or if there is fault
or damage on the pump.
Start and stop of the pump at different water
levels may be manual or automatic. If automatic
start and stop is required, a level regulator can
be ordered (as option).
Level regulators are available in 1 phase for both
50 Hz and 60 Hz markets.
The level regulator can be set at different oper-
ating levels by adjusting the length of cable. A
clamping bracket situated at the discharge con-
nection holds the level regulator cable in place.
If continuous pumping is required at any time
the level regulator can be placed in a special
rubber bracket on the discharge connection thus
eliminating the level regulator function.
Level regulators
ON
OFF
NOTE!
If cable with ground check
is used for pump with level
regulator, the ground check
connection must be done at
the GC-connection point with
a stud and two nuts.

Installation, care and maintenance Minex
10
50/60 Hz 1~, SUBCAB®/SUBCAB®AWG
with contactor unit, with or without level regulator
WARNING!
If persons are likely to
come into physical contact
with the pump or pumped
media (liquid), e.g on con-
struction sites and farms,
the earthed (grounded)
socket must have an addi-
tional earth(ground-) fault
protection device (GFI)
connected.
WARNING!
When pumping near a lake
(jetties, beaches, ponds,
fountains etc) a safety-dis-
tance of at least 20 m (65
ft) between the person and
the pump is applicable. The
pump must never be placed
directly into a swim ming
pool. If used in connection
with swimming pools, spe-
cial safety regulations ap-
ply.

11
Installation, care and maintenance Minex
50/60 Hz 3~, SUBCAB®/SUBCAB®AWG/Screened cable
with contactor unit, Y or D, with or without transformer operation

Installation, care and maintenance Minex
12
50/60 Hz 3~, SUBCAB®/SUBCAB®AWG/Screened cable
with contactor unit, Yser. or Y//, with or without transformer operation
NOTE!
The thermal contacts in the winding are CSA approved only for 250 V and below.
For other voltages when CSA approval is required a transformer is used to reduce
the voltage over the thermal contacts.
As a consequence the transformer has to be disconnected when the connection is
changed from 440-460 V Yser to 220-240 V Y// or to 230 V single phase. If the
change is done from 220-240 V Y// or 230 V single phase to 440-460 V Yser the
transformer has to be connected.

13
Installation, care and maintenance Minex
Operation
Before starting
Check the oil level in the oil casing.
Remove the fuses or open the circuit breaker
and check that the impeller can be rotated by
hand.
Check that the monitoring equipment (if any)
works.
The impeller shall rotate clockwise, as viewed
from above. When started, the pump will jerk in
the opposite direction to the direction in which
the impeller rotates. See the  gure.
Starting jerk
WARNING!
Always lift the pump by its
carrying handle or lifting eyes,
never by the motor cable or
the hose.
Insert the plug
The pump
doesn’t start
START
Pull out the plug
and shift two phases
1. 2. 3. 4. 5.
Switch on Shift phases
If the pump still
doesn’t start, call a
quali ed electrician
CEE plug
Phase
shifter
On/Off
switch
The pumps are equipped with SMART ROTASENSE™ (rotation control). Note the following at start:
Connect the pump to power. If the pump fails to start and the fuses are correct, shift two phases in
the CEE plug or turn the knob on phase shifter to start the pump.
NOTE! Do not reverse phase sequence while pump motor is running. Doing so may cause temporary
incorrect rotation, resulting in damage to motor electronics and rotating parts.
If the pump still doesn’t start, call a quali ed electrician and ask him to check the mains and the
junctions.
Cleaning
If the pump has been running in very dirty wa-
ter, let it run for a while in clean water, or  ush
it through the discharge connection. If clay,
cement or other similar dirt is left in the pump it
may clog the impeller and seal, preventing the
pump from working.
During a longer period out of operation, the
pump must be test run every other month to
prevent the mechanical seals from sticking to-
gether.
WARNING!
Watch out for the starting jerk,
which can be powerful.
50/60 Hz 3~, SUBCAB®/SUBCAB®AWG/Screened cable
with contactor unit, Yser. or Y//, with or without transformer operation

Installation, care and maintenance Minex
14
Care and maintenance
Safety precautions Inspection
Regular inspection and preventive maintenance
ensure more reliable operation.
The pump should be inspected at least twice a
year, more frequently under severe operating
conditions.
Under normal operating conditions, the pump
should have a major overhaul in a service shop
once a year.
This requires special tools and should be done by
an authorized service shop.
When the pump is new or when the seals have
been replaced, inspection is recommended after
one week of operation.
WARNING!
Before starting to work on the
pump or moving the pump,
make sure that the pump is
isolated from the power sup-
ply and cannot be energized.
This applies to the control cir-
cuit as well.
WARNING!
Make sure that the pump can-
not roll or fall over and injure
people or damage property

15
Installation, care and maintenance Minex
Visible parts on pump
and installation
Pump casing and
impeller
Condition of the oil
Oil quantity
Liquid in the inspec-
tion chamber
Recommended inspections:
Inspection of Action
WARNING!
If the seal leaks, the oil casing may be under pressure.
Hold a rag over the oil casing screw in order to prevent
splatter. See “Safety precautions” for additional informa-
tion.
WARNING!
If there has been leakage, the stator casing may be un-
der pressure. Hold a rag over the inspection screw to
prevent splatter. See “Safety precautions” for additional
information.
Lay the pump on its side.
Tilt the pump so that any liquid in the inspection chamber can run out
through the hole.
If there is water in the stator casing, the cause may be:
— that the inspection screw is not sufciently tight.
— that the O-ring on the inspection screw or its sealing surface is dam
aged.
— that an O-ring is damaged.
— that the cable entry is leaking.
If there is oil in the inspections chamber, the cause may be:
— that the inner mechanical seal is damaged. Contact a Grindex serv
ice shop.
Replace or x worn and damaged parts.
Make sure that all screws, bolts and nuts are tight.
Replace worn parts if they impair function.
A check of the condition of the oil can show whether there has been an
increased leakage. Note! Air/oil mixture can be confused with water/oil
mixture.
Insert a tube (or hose) into the oil hole. Cover the top end of the tube and
take up a little oil from the bottom.
Change the oil if it contains too much water.
See “Changing the oil”. Check again one week after changing the oil.
If the oil contains too much water again, the fault may be:
— that an oil screw is not sufciently tight.
— that the O-ring on an oil screw or its sealing surface is damaged.
— that the mechanical seal is damaged. Contact a Grindex service
shop.
0.22 litres (0.058 US gallon)

Installation, care and maintenance Minex
16
Recommended inspections:
Inspection of Action
Make sure that the cable clamps are tight. If the cable entry leaks:
— check that the entry is rmly tightened into its bottom-most posi
tion.
— cut a piece of the cable off so that the seal sleeve closes around a
new position on the cable.
— replace the seal sleeve.
— check that the seal sleeve and the washers conform to the outside
diameter of the cables.
Replace the cable if the outer jacket is damaged. Make sure that the cable
do not have any sharp bends and are not pinched.
If faulty, contact an electrician.
Repair faults and notify supervisor of any faults or defects.
Contact a Grindex service shop.
Cables
Starter equipment
Pipes, valves and other
peripheral equipment
Insulation resistance in
the stator
Cable entry

17
Installation, care and maintenance Minex
WARNING!
If the seal leaks, the oil casing
may be under pressure. Hold
a rag over the oil casing screw
in order to prevent splatter.
See “Safety precautions” for
additional information.
Explanation of symbols
= Oil screw
= Inspection plug
It is easier to drain the oil if the other oil screw
is also removed.
Fill up with new oil.
A parafn oil with viscosity close to ISO VG32 is
recommended. The pump is delivered from fac-
tory with this type of oil.
In applications where poisonous properties are
of less concern, a mineral oil with viscosity up to
ISO VG32 can be used.
Always replace the O-rings on the oil screws. Put
the screws back and tighten them.
Changing the oil
Lift the pump horizontally on relief table.
Turn the pump so that one of the oil screws
faces downwards. Lock the pump with a support
preventing it from rolling over.
Unscrew the oil screw.

Installation, care and maintenance Minex
18
Removing the impeller
Lock the impeller with a screw driver or similar
(L= min. 200 mm/7.9 inch), see g. to prevent
rotation of the impeller.
Loosen and remove the impeller screw and
washer.
WARNING!
Worn impellers often have
very sharp edges. Use protec-
tive gloves.
Remove the strainer.
Remove the diffuser part.

19
Installation, care and maintenance Minex
Using a 8 mm hexagon bit adaptor (allen socket)
with a 100 mm (4”) extension turn the adjust-
ment screw counter clockwise until the impeller
breaks free from the shaft.
Remove the impeller.
Before assembly, check that the impeller screw
is clean and easy to screw into the shaft end
(a). This to prevent the shaft to rotate with the
impeller screw. Assemble the conical sleeve and
the impeller onto the shaft.
Installing the impeller and
setting clearance
Make sure that the end of the shaft is clean and
free from burrs. Polish off any aws with ne
emery cloth. Grease end of shaft, conical sleeve
and the threads of the adjustment screw. The
proper lubrication is grease for bearings e.g.
Exxon Mobile Unirex N3 or equivalent.
NOTE!
Remove surplus grease from conical and cy-
lindrical surfaces of the shaft and the sleeve
thoroughly.
Align the edge of the adjustment screw with the
edge of the conical sleeve so that they are ush.
Grease the threads of the screw and the washer.
The proper lubrication of the screw and washer
is lubricating grease for assembly of bolts etc.
e.g. Kluber ALTEMP Q NB 50 or equivalent.

Installation, care and maintenance Minex
20
Mount the strainer and the nuts, tightening
torque 22 Nm (16.2 Lbf ft).
Mount the diffuser part.
Tighten the screws, tightening torque 22 Nm
(16.2 Lbf ft).
Lock the impeller with a screw driver or similar
(L= min. 200 mm/7.9 inch), see g., to prevent
rotation of the impeller. Fit the washer and the
greased impeller screw and tighten, torque to 22
Nm (16.2 Lbf ft().
Check that the impeller rotates freely.
When changing an impeller or after service, we
recommend that the screw is rst tightened to
the prescribed torque and then turned an ad-
ditional 1/8 ( 45°) of a revolution. The screw
will be loaded to its yield point and the load
capacity of the joint will be higher.
Using a 8 mm hexagon bit adaptor (allen socket)
with a 100 mm (4”) extension, turn the adjust-
ment screw clockwise until the impeller makes
contact with the suction cover. Tighten it further
1/8 turn, 45o . This will ensure the correct clear-
ance between the impeller and the suction cover
in the next step.