Grindex MASTER N Maintenance manual

Installation, care and maintenance
MASTER www.grindex.com
No: 89 73 92 Revision 03 2009.01

Installation, care and maintenance MASTER
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

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

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
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
S Weight

3
Installation, care and maintenance MASTER
Safety symbols
Following symbols are used in
this manual:
For electrical related warnings.
Safety precautions
For all other warnings.
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.
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.

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).

spare parts manufacturing

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.

Installation, care and maintenance MASTER
4
Product description
Applications
Master N & Hare intended to be used for:
— pumping of water which may contain abrasive
particles.
The pumps are available in the following ver-
sions:
N= Normal head version
H= High head version
Liquid temperature: standard version, max.
40°C (104°F).
3(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

environment or for pumping

WARNING!
If the pump run dry or snore,
the pump surface and the sur-

Bear in mind the risk of burn
injuries.
WARNING!
The machine is not to be

as hazardous in accordance
with the national electric code,
ANSI/NFPA 70-1990
Voltage
V
Rated current
A
Starting current
A
220 D 34 195
230 D 33 205
240 D 34 215
380 D 20 124
400 D 19 107
415 D 18 111
440 D 18 119
500 D 15 94
550 D 14 84
Voltage
V
Rated current
A
Starting current
A
200 D 40 250
208 D 39 262
220 D 37 222
 37 213
230 D 35 233
 35 224
240 D 35 245
 35 235
380 D 21 128
400 D 20 136
440 D 19 129
440 Yser 18 107
460 D 17 110
460 Yser 18 112
480 D 17 115
480 Yser 17 117
575 D 14 96
600 D 14 101

Rated output: 10 kW (13.4 hp)
Max cons.: 11.7 kW (15.7 hp)

Rated output: 11.2 kW (15 hp)
Max cons.: 12.8 kW (17.2 hp)
Motor data

motor for 50 Hz and 60 Hz markets.

5
Installation, care and maintenance MASTER
Dimensions and weights
Master N Master H

Installation, care and maintenance MASTER
6
Performance curves
Each pump is tested in accordance with ISO 9906.
Master N, 50 Hz
Head [ft] / [m]
Capacity [l/s] / [usgpm]
120
80
40
0
0200 400 600 800 1000 1200
0 10 20 30 40 50 60 70 80
40
35
0
30
25
20
15
10
0
6
7
8
9
10
11
12
P
1
[hp] / [kW]
16
12
8
4
Master H, 50 Hz
4
6
8
10
12
P1[hp] / [kW]
0
10
20
30
40
50
60
0 5 10 15 20 25 30 35
Head [ft] / [m]
Capacity [l/s] / [usgpm]
180
120
60
0
16
12
8
4
0100 200 300 400 500

7
Installation, care and maintenance MASTER
Master N, 60 Hz
7
8
9
10
11
12
13
P1[hp] / [kW]
16
12
8
4
Head [ft] / [m]
Capacity [l/s] / [usgpm]
120
80
40
0
40
35
30
25
20
15
10
5
0
010 20 30 40 50 60 70 80
0200 400 600 800 1000 1200
Master H, 60 Hz
4
6
8
10
12
14
P1[hp] / [kW]
0 5 10 15 20 25 30 35 40
70
60
50
40
30
20
10
0
Capacity [l/s] / [usgpm]
Head [ft] / [m]
18
12
6
200
150
50
0
0100 200 300 400 500
100

Installation, care and maintenance MASTER
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!
-
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,

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

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 MASTER
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

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

starting. In this case the supply authority should

WARNING!

be earthed (grounded). This
-
ment and any monitoring

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

product is correctly connected
and in use.
WARNING!

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.
WARNING!
If persons are likely to
come into physical contact
with the pump or pumped
-
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-
distance of at least 20 m
(65 ft) between the person
and the pump is applica-
ble. The pump must never
be placed directly into a
swim ming pool. If used in
connection with swimming
pools, special safety regu-
lations apply.
NOTE!

an overload relay. If the relay
has tripped due to overload,
the pump must be restarted
manually by turning the power
off and then on.

Installation, care and maintenance MASTER
10
SUBCAB®4GX/SUBCAB®AWG,
6-leads, Y or D
SUBCAB®4GX/SUBCAB®AWG,
9-leads, Y// or Yser

11
Installation, care and maintenance MASTER
Connection of motor protector
NOTE!
The thermal contacts in the winding are CSA approved only for 250 V and below.

the voltage over the thermal contacts.

is changed from 440-460 V Yser to 220-240 V Y// . If the change is done from
220-240 V Y// to 440-460 V Yser the transformer has to be connected.

Installation, care and maintenance MASTER
12
SUBCAB®4GX/SUBCAB®AWG,
6-leads, Y/D

13
Installation, care and maintenance MASTER
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

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

CEE plug
Phase
shifter

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.

junctions.
Cleaning
If the pump has been running in very dirty wa-

it through the discharge connection. If clay, ce-
ment 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
together.
WARNING!
Watch out for the starting jerk,
which can be powerful.

Installation, care and maintenance MASTER
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 MASTER
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 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.

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

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 the O-ring on an oil screw or its sealing surface is damaged.
— that the mechanical seal is damaged. Contact a Grindex service
shop.
1.45 litres (0.38 US gallon)

Installation, care and maintenance MASTER
16
Recommended inspections:
Inspection of Action
Make sure that the cable clamps are tight. If the cable entry leaks:
 
— 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 MASTER
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.

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 with an overhead
crane and place 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 MASTER
18
Removing the impeller
Lock the impeller with a screw driver or similar

rotation of the impeller.
Loosen and remove the impeller screw and
washer.
Using a 10 mm hexagon bit adaptor (allen
socket) with a 100 mm (4”) extension turn the
adjustment screw counter clockwise until the
impeller breaks free from the shaft.
Remove the impeller.
WARNING!
Worn impellers often have
very sharp edges. Use protec-
tive gloves.
NH
Remove the strainer, the suction cover and
O-ring.

19
Installation, care and maintenance MASTER
Mount the cover with its O-ring.
Tighten the screws, tightening torque 44 Nm
(32.5 lbf-ft).
Make sure that the impeller rotates freely. If not,
the adjustment screw and the conical sleeve has
not been aligned and the shaft might have been
displaced relative to the main bearing!
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

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

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 MASTER
20
Mount the strainer and the nuts,
tightening torque 44 Nm (32.5 Lbf ft).
N H
Turn the adjustment screw clockwise until the
impeller makes contact with the suction cover.
o . This will ensure
the correct clearance between the impeller and
the suction cover in the next step.
Lock the impeller with a screw driver or similar

rotation of the impeller. Fit the washer and the
greased impeller screw and tighten, torque to 44
Nm (32.5 lbf-ft).
Check that the impeller rotates freely.
When changing an impeller or after service, we

the prescribed torque and then turned an addi-

be loaded to its yield point and the load capacity
of the jonit will be higher.