Grundfos SP User manual

SP/SPE
Installation and operating instructions
SP
Installation and operating instructions
Other languages
http://net.grundfos.com/qr/i/98074911
GRUNDFOS INSTRUCTIONS

SP/SPE
English (GB)
Installation and operating instructions ..........................................................4
Appendix A.............................................................................28
3
Table of contents

English (GB) Installation and operating instructions
Original installation and operating instructions
Table of contents
1. General Information ........................4
1.1 Hazard statements..........................4
1.2 Notes ..................................5
2. Introduction .............................5
3. Handling and storing the product ...............5
3.1 Handling ................................5
3.2 Storage.................................5
4. Applications .............................6
4.1 Pumped liquids ............................6
4.2 Sound pressure level ........................6
4.3 Drinking water ............................6
5. Installation requirements .....................7
5.1 Checking the motor liquid......................7
5.2 Positional requirements .......................9
5.3 Pump/motor diameter ........................9
5.4 Liquid temperatures and motor cooling ............10
5.5 Pipe connection ..........................10
6. Electrical connection ......................11
6.1 Motor protection ..........................12
6.2 Lightning protection ........................12
6.3 Cable sizing .............................13
6.4 Control of single-phase MS402 motors ............14
6.5 Connection of single-phase motors ...............14
6.6 Connection of three-phase motors ...............15
7. Setting up the CUE frequency converter in an SPE
system................................18
8. Mechanical installation .....................19
8.1 Removing and fitting the cable guard..............19
8.2 Fitting of the submersible drop cable and motor cable . ..19
8.3 Lifting the product .........................20
8.4 Riser pipe ..............................20
8.5 Placing in borehole ........................20
8.6 Cable clips..............................21
8.7 Lowering the pump ........................21
8.8 Installation depth ..........................21
9. Startup and operation ......................22
9.1 Startup ................................22
9.2 Operation ..............................22
10. Service ...............................23
10.1 SPE..................................23
11. Fault finding ............................24
11.1 SPE..................................24
12. Checking motor and cable ...................25
12.1 SPE..................................25
13. Disposing of hazardous or toxic materials ........27
14. Disposing of the product ....................27
1. General Information
Read this document before you install the product.
Installation and operation must comply with local
regulations and accepted codes of good practice.
Read this document and the online version of the
installation and operating instructions before installing the
product. Installation and operation must comply with local
regulations and accepted codes of good practice.
This appliance can be used by children aged from 8 years
and above and persons with reduced physical, sensory or
mental capabilities or lack of experience and knowledge if
they have been given supervision or instruction
concerning use of the appliance in a safe way and
understand the hazards involved.
Children shall not play with the appliance.
Cleaning and user maintenance shall not be made by
children without supervision.
1.1 Hazard statements
The symbols and hazard statements below may appear in Grundfos
installation and operating instructions, safety instructions and
service instructions.
DANGER
Indicates a hazardous situation which, if not avoided, will
result in death or serious personal injury.
WARNING
Indicates a hazardous situation which, if not avoided,
could result in death or serious personal injury.
CAUTION
Indicates a hazardous situation which, if not avoided,
could result in minor or moderate personal injury.
The hazard statements are structured in the following way:
SIGNAL WORD
Description of the hazard
Consequence of ignoring the warning
• Action to avoid the hazard.
4
English (GB)

1.2 Notes
The symbols and notes below may appear in Grundfos installation
and operating instructions, safety instructions and service
instructions.
Observe these instructions for explosion-proof products.
A blue or grey circle with a white graphical symbol
indicates that an action must be taken.
A red or grey circle with a diagonal bar, possibly with a
black graphical symbol, indicates that an action must not
be taken or must be stopped.
If these instructions are not observed, it may result in
malfunction or damage to the equipment.
Tips and advice that make the work easier.
2. Introduction
These instructions apply to Grundfos submersible pumps, type
SP/SPE and SPA, with submersible motors, types Grundfos MS/
MMS.
If the pump is fitted with a motor of another brand than Grundfos
MS or MMS, note that the motor data may differ from the data
stated in these instructions.
3. Handling and storing the product
3.1 Handling
WARNING
Crushing of feet
Death or serious personal injury
‐Stack the pumps with the biggest at the bottom, and
do not stack above 1 m.
‐Use lifting equipment which is approved for the weight
of the product.
‐Wear personal protective equipment.
WARNING
Crushing of hands
Death or serious personal injury
‐Stack the pumps with the biggest at the bottom, and
do not stack above 1 m.
‐Use lifting equipment which is approved for the weight
of the product.
Store the pump in the package until it is ready for
installation.
Handle the pump with care.
Fix the extra nameplate supplied with the pump at the
installation site.
Do not expose the pump to mechanical impact, vibrations etc.
3.2 Storage
Storage temperature
Pump: -20 - +60 °C.
Motor: -20 - +70 °C.
The motors must be stored in a closed, dry and well ventilated
room.
If MMS motors are stored, the shaft must be turned by
hand at least once a month. If a motor has been stored for
more than one year before installation, the rotating parts
of the motor must be dismantled and checked before use.
The pump must not be exposed to direct sunlight.
If the pump has been unpacked, it must be stored horizontally,
adequately supported, or vertically to prevent misalignment of the
pump. Make sure that the pump cannot roll or fall over.
During storage, the pump can be supported as shown in fig. Pump
position during storage.
TM001349
Pump position during storage
Frost protection
If the pump has to be stored after use, it must be stored on a frost-
free location, or the motor liquid must be frost-proof.
5
English (GB)

4. Applications
Grundfos SP submersible pumps are designed for a wide range of
water supply and liquid transfer applications, such as the supply of
fresh water to private homes or waterworks, water supply in
horticulture and agriculture, drawdown of groundwater and pressure
boosting, and various industrial jobs.
The pump must be installed so that the suction interconnector is
completely submerged in the liquid. The pump can be installed
horizontally or vertically. See section Positional requirements.
Related information
5.2 Positional requirements
4.1 Pumped liquids
Clean, thin, non-explosive liquids without solid particles or fibres.
The maximum sand content of the water must not exceed
50/100/150 ppm. A larger sand content will reduce the life of the
pump and increase the risk of blockage.
Pump type Maximum content of sand
[ppm]
SP 1A - SP 5A 50
SP 7 - SP 14 150
SP 18 - SP 62 100
SP 77 - SP 215 50
When pumping liquids with a density higher than water
(998-1000 kg/m3), motors with correspondingly higher
outputs must be used.
If liquids with a viscosity higher than that of water are to be pumped,
contact Grundfos.
N EN 1.4401 and R EN 1.4539 grade stainless steel pump sets are
designed for liquids more aggressive than drinking water.
The maximum liquid temperature appears from the section on liquid
temperatures and motor cooling.
Related information
5.4 Liquid temperatures and motor cooling
4.2 Sound pressure level
The sound pressure level has been measured in accordance with
the rules laid down in the EC machinery directive 2006/42/EC.
Sound pressure level of pumps
The values apply to pumps submerged in water.
Pump type LpA [dB(A)]
SP 1A
less than 70
SP 2A
SP 3A
SP 5A
SP 7
SP 9
SP 11
SP 14
SP 18
SP 30/32
SP 46/47
SP 60/62
SP 77
SP 95
SP 125 79
SP 160 79
SP 215 82
Sound pressure level of motors
The sound pressure level of Grundfos MS and MMS motors is lower
than 70 dB(A).
Other motor brands: See installation and operating instructions for
these motors.
4.3 Drinking water
If the product is used for drinking water, the following precautions
must be taken to avoid contamination:
• Before use, make sure that the product does not come into
contact with dust or with chemicals not suitable for contact with
drinking water, for example lubricants, greases or oils.
• If the pump is used with potentially toxic liquids, it can no longer
be used for drinking water.
• Always use original parts to maintain the initial hygienic
characteristics of the product.
6
English (GB)

5. Installation requirements
DANGER
Electric shock
Death or serious personal injury
‐Switch off the power supply before starting any work
on the product.
‐Make sure that the power supply cannot be
accidentally switched on.
WARNING
Crushing of feet
Death or serious personal injury
‐When lifting the pump out of the box, use lifting
equipment which is approved for the weight of the
product.
‐Wear personal protective equipment.
WARNING
Crushing of hands
Death or serious personal injury
‐When lifting the pump out of the box, use lifting
equipment which is approved for the weight of the
product.
‐Wear personal protective equipment.
Unless the requirements in the section on frequency
converter operation MS6000P are met, the use of a sine-
wave filter is mandatory when operating an SPE pump
set.
Grundfos recommends fitting a 30 cm long pipe to the
pump to facilitate handling of the pump during installation.
TM059648
Handling of the motor
5.1 Checking the motor liquid
The motors are factory-filled with a special FDA approved non-toxic
liquid which is frost-proof down to -20 °C.
Check the level of motor liquid and refill if required. Use
tap water.
If frost protection is required, special Grundfos liquid must
be used to refill the motor. Otherwise tap water may be
used for refilling; however refill liquid as described below.
5.1.1 Grundfos MS4000 and MS402 motors
The filling hole for motor liquid is placed in the following positions:
• MS4000: on the side of the motor near the top
• MS402: in the bottom of the motor.
1. Position the submersible pump as shown in fig. Motor position
during filling - MS4000 and MS402. The filling screw must be at
the highest point of the motor.
2. Remove the screw from the filling hole.
3. Inject liquid into the motor with the filling syringe until the liquid
runs back out of the filling hole. See fig. Motor position during
filling - MS4000 and MS402.
4. Replace the screw in the filling hole and tighten securely before
changing the position of the pump.
Torques
• MS4000: 3.0 Nm.
• MS402: 2.0 Nm.
The submersible pump is now ready for installation.
MS402
MS4000
TM006423
Motor position during filling - MS4000 and MS402
7
English (GB)

5.1.2 Grundfos MS6000 motors
• If the motor is delivered from stock, the liquid level must be
checked before the motor is installed. See fig. Motor position
during filling - MS6000.
• In the case of service, the liquid level must be checked. See fig.
Motor position during filling - MS6000.
Filling procedure:
The filling hole for motor liquid is placed at the top of the motor.
1. Position the submersible motor as shown in fig. Motor position
during filling - MS6000. The filling screw must be at the highest
point of the motor.
2. Remove the screw from the filling hole.
3. Inject liquid into the motor with the filling syringe (fig. Motor
position during filling - MS6000) until the liquid runs back out of
the filling hole.
4. Replace the screw in the filling hole and tighten securely before
changing the position of the motor.
Torque: 3.0 Nm.
The submersible motor is now ready for installation.
45°
TM038129
Motor position during filling - MS6000
5.1.3 Grundfos MMS6, MMS8000, MMS10000 and MMS12000
motors
Filling procedure:
Place the motor at a 45° angle with the top of the motor upwards.
See fig. Motor position during filling - MMS.
1. Unscrew the plug (A) and place a funnel in the hole.
2. Pour tap water into the motor until the motor liquid inside the
motor starts running out at the plug (A).
Do not use motor liquid that contains oil.
3. Remove the funnel and refit the plug(A).
Before fitting the motor to a pump after a long period
of storage, lubricate the shaft seal by adding a few
drops of water and turning the shaft.
The submersible motor is now ready for assembly with the pump
and ready for installation.
45°
A
TM030265
Motor position during filling - MMS
8
English (GB)

5.2 Positional requirements
WARNING
Crushing of hands
Death or serious personal injury
‐If the pump is to be installed in a position where it is
accessible, the coupling must be suitably isolated from
human touch. The pump can for instance be built into
a flow sleeve.
Depending on motor type, the pump can be installed either
vertically or horizontally. A complete list of motor types suitable for
horizontal installation is shown in section Motors suitable for
horizontal installation.
If the pump is installed horizontally, the outlet port must never fall
below the horizontal plane. See fig. Positional requirements.
A
B
TM001355
Positional requirements
Pos. Description
A Allowed
B Not allowed
If the pump is installed horizontally, e.g. in a tank, we recommend
that you fit it in a flow sleeve.
Related information
5.2.1 Motors suitable for horizontal installation
5.2.1 Motors suitable for horizontal installation
Motor
Output power
50 Hz
Output power
60 Hz
[kW] [kW]
MS All All
MMS6 5.5 - 37 5.5 - 37
MMS8000 22-92 22-92
MMS10000 75-170 75-170
MMS12000 147-190
CAUTION
Hot surface
Minor or moderate personal injury
‐If the pump is used for pumping hot liquids (40 to 60
°C), make sure that persons cannot come into contact
with the pump and the installation, e.g. by installing a
guard.
During operation, the suction interconnector of the pump
must always be completely submerged in the liquid. Make
sure that the NPSH values are fulfilled.
5.3 Pump/motor diameter
We recommend that you check the borehole with an inside calliper
to ensure unobstructed passage.
9
English (GB)

5.4 Liquid temperatures and motor cooling
The maximum liquid temperature and the minimum flow velocity
past the motor appear from the following table.
Grundfos recommends installing the motor above the well screen in
order to achieve proper motor cooling via liquid passing the motor.
In cases where the stated flow velocity cannot be
achieved, a flow sleeve must be installed.
If there is a risk of sediment build-up, such as sand, around the
motor, a flow sleeve should be used in order to ensure proper
cooling of the motor.
Motor
Installation
Flow
past the
motor
[m/s]
Vertical Horizontal
MS402
MS4000 (T40)
MS6000 (T40)
0.15 40 °C
(105 °F)
40 °C
(105 °F)
MS6000P (T60) 0.15 60 °C
(140 °F)
60 °C
(140 °F)
MS4000I (T60) 1)
MS6000 (T60 ) 1) 1.00
60 °C
(140 °F)
Flow sleeve
recommended
60 °C
(140 °F)
Flow sleeve
recommended
MS6000 (T60) 2) 0.15
60 °C
(140 °F)
Flow sleeve
recommended
60 °C
(140 °F)
Flow sleeve
recommended
MMS6
PVC
windings
0.20 25 °C
(86 °F)
25 °C
(86 °F)
0.50 30 °C
(95 °F)
30 °C
(95 °F)
PE/PA
windings
0.20 45 °C
(113 °F)
45 °C
(113 °F)
0.50 50 °C
(122 °F)
50 °C
(122 °F)
MMS
8000 to
12000
PVC
windings
0.15 25 °C
(77 °F)
25 °C
(77 °F)
0.50 30 °C
(86 °F)
30 °C
(86 °F)
PE/PA
windings
0.15 40 °C
(104 °F)
40 °C
(104 °F)
0.50 45 °C
(113 °F)
45 °C
(113 °F)
1) At an ambient pressure of minimum 1 bar (0.1 MPa).
2) At an ambient pressure of minimum 2 bar (0.2 MPa).
5.4.1 Flow velocity formula
V = Q × 353 [m/s]
D2 - d2
Qm3/h Flow rate
D mm Sleeve diameter or borehole diameter
d mm Pump diameter
For 37 kW MMS6 (only PVC windings), 110 kW MMS8000
and 170 kW MMS10000, the maximum liquid temperature
is 5 °C lower than the values stated in the above table.
For 190 kW MMS10000, 220-250 kW MMS12000/50 Hz
and MMS12000/60 Hz, the temperature is 10 °C lower.
5.5 Pipe connection
If noise may be transmitted to the building through the pipes, we
recommend that you use plastic pipes.
Plastic pipes are recommended for 4" pumps only.
When using plastic pipes, secure the pump by an unloaded
straining wire.
WARNING
Hot liquid
Death or serious personal injury
‐Use pipes designed for the maximum pump pressure
plus 10 % to avoid pipe burst.
‐Make sure that the plastic pipes are suitable for the
actual liquid temperature.
When connecting plastic pipes, use a compression coupling
between the pump and the first pipe section.
10
English (GB)

6. Electrical connection
DANGER
Electric shock
Death or serious personal injury
‐Switch off the power supply before starting any work
on the product.
‐Make sure that the power supply cannot be
accidentally switched on.
DANGER
Electric shock
Death or serious personal injury
‐The pump must be earthed.
‐The pump must be connected to an external main
switch and shall be provided with a means permitting it
to be locked in the OFF (isolated) position. Type and
requirements as specified in EN 60204-1, 5.3.2
The electrical connection must be carried out by an
authorised person in accordance with local regulations.
The supply voltage, rated maximum current and cos φ appear from
the separate name plate which must be fitted close to the
installation site.
The required voltage quality for MS and MMS motors, measured at
the motor terminals, is -10 % / +6 % of the nominal voltage during
continuous operation (including variation in the supply voltage and
losses in cables).
Check also that there is voltage symmetry in the power supply lines,
i.e. same difference of voltage between the individual phases. See
Appendix, item 2.
If MS motors with a built-in temperature transmitter (Tempcon) are
not installed together with an MP 204 motor protection unit, they
must be connected to a 0.47 μF capacitor approved for phase-
phase operation (IEC 384-14) to meet the EC EMC directive
(2004/108/EC). The capacitor must be connected to the two phases
to which the temperature transmitter is connected. See fig.
Connection of capacitor.
1
2
3
4
TM007100
Connection of capacitor
Colours of the conductors
Conductor Flat cable Single conductors
1 = L1 Brown Black
2 = L2 Black Yellow
3 = L3 Grey Red
4 = PE Yellow and green Green
The motors are wound for direct-on-line starting or star-delta
starting, and the starting current is between four and six times the
rated current of the motor.
The run-up time of the pump is only about 0.1 second. Direct-on-
line starting is therefore normally approved by the power supply
company.
11
English (GB)

6.1 Motor protection
6.1.1 Single-phase motors
Single-phase MS402 motors incorporate a thermal switch and
require no additional motor protection. As an exception, the 1.1 kW
(1.5 hp) MS402 requires external current protection.
DANGER
Electric shock
Death or serious personal injury
‐Switch off the power supply before starting any work
on the product.
‐Make sure that the power supply cannot be
accidentally switched on.
DANGER
Electric shock
Death or serious personal injury
‐The pump must be connected to protective earth.
‐Switch off the power supply before starting any work
on the product.
‐Make sure that the power supply cannot be
accidentally switched on.
Single-phase MS4000 motors must be protected. A protective
device can either be incorporated in a control box or be separate.
6.1.2 Three-phase motors
MS motors are available with or without a built-in temperature
transmitter.
Motors with a built-in and operational temperature transmitter must
be protected by:
• a motor-protective circuit breaker with thermal relay or
• an MP 204 motor protection unit and contactor(s).
Motors with or without a non-operational temperature transmitter
must be protected by:
• a motor-protective circuit breaker with thermal relay or
• an MP 204 motor protection unit and contactor(s).
MMS motors have no built-in temperature transmitter. A Pt100
sensor is available as an accessory.
Motors with a Pt100 sensor must be protected by the following:
• a motor-protective circuit breaker with thermal relay or
• an MP 204 motor protection unit and contactor(s).
Motors without a Pt100 sensor must be protected by the following:
• a motor-protective circuit breaker with thermal relay with max.
trip class 10 according to IEC 60947-4-1 or
• an MP 204 motor protection unit and contactor(s).
6.1.3 Required settings of motor-protective circuit breaker
For motors with an MP 204 motor protection unit, Grundfos
recommends using a special trip curve with P-characteristics at a
setting of Un times 5 for 1 second.
For cold motors, the tripping time for the motor-protective circuit
breaker must be less than 10 seconds at five times the rated
maximum current of the motor.
For all Grundfos submersible MMS motors, the maximum start and
stop ramp time is 3 seconds (minimum 30 Hz).
If this requirement is not met, the motor warranty will be
invalidated.
In order to ensure optimum protection of the submersible motor, set
the motor-protective circuit breaker in accordance with the
following:
1. Set the motor-protective circuit breaker to the rated maximum
current of the motor.
2. Start the pump and let it run for half an hour at normal
performance.
3. Slowly grade down the scale indicator until the motor trip point is
reached.
4. Increase the setting by 5 %.
The highest permissible setting is the rated maximum current of the
motor.
For motors wound for star-delta starting, the motor-protective circuit
breaker must be set as above, but the maximum setting must be
rated maximum current × 0.58.
The highest permissible startup time for star-delta starting or
autotransformer starting is 2 seconds.
6.2 Lightning protection
The installation can be fitted with a special overvoltage protection
device to protect the motor from voltage surges in the power supply
lines if lightning strikes somewhere in the area. See fig. 8
L1
L2
L3
PE PE
L
N
825045 825017
12
TM001357
Connecting an overvoltage protective device
Pos. Description
1 Three-phase
2 Single-phase
The overvoltage protective device will not, however, protect the
motor against a direct stroke of lightning.
Connect the overvoltage protective device to the installation as
close as possible to the motor and always in accordance with local
regulations. Ask Grundfos for lightning protective devices.
MS402 motors, however, require no further lightning protection as
they are highly insulated.
12
English (GB)

6.3 Cable sizing
Submersible motor cables are dimensioned for
submersion in liquid, and will not necessarily have
sufficient cross-section to be in free air.
Make sure that the submersible drop cable can withstand
permanent submersion in the actual liquid and at the actual
temperature.
The cross-section (q) of the cable must meet the following
requirements:
• The submersible drop cable must be sized to the rated
maximum current of the motor.
• The cross-section must be sufficient to make a voltage drop
over the cable acceptable.
Grundfos supplies submersible drop cables for a wide range of
installations. A cable sizing tool is available on Grundfos Insite at:
https://www.grundfos.com/sp-system/download-sp-app-html.
TM076259_GRAY
Cable sizing tool
The sizing tool provides an accurate calculation of the voltage drop
at a given cross-section on the basis of the following parameters:
• cable length
• operating voltage
• full-load current
• power factor
• ambient temperature.
The voltage drop can be calculated both for direct-on-line and star-
delta starting.
In order to minimise operating losses, the cable cross-section may
be increased. This is only cost-efficient if the borehole provides the
necessary space, and if the operating time of the pump is long. The
cable sizing tool also provides a power loss calculator that shows
the potential savings of an increased cross-section.
As an alternative to the cable sizing tool, select the cross-section on
the basis of the current values of the given cables.
The cross-section of the submersible drop cable must be large
enough to meet the voltage quality requirements specified in
section Electrical connection .
Determine the voltage drop for the cross-section of the submersible
drop cable by means of the diagrams in the Appendix.
Use the following formula:
I: rated maximum current of the motor.
For star-delta starting, I is equal to the rated maximum current of
the motor × 0.58.
Lx: length of cable converted to a voltage drop of 1 % of the
nominal voltage.
Lx = length of drop cable
permissible voltage drop in %
q: cross-section of submersible drop cable.
Draw a straight line between the actual I-value and the Lx-value.
Where the line intersects the q-axis, select the cross-section that
lies right above the intersection.
The diagrams are made on the basis of the formulas:
Single-phase submersible motor
L =
U × ΔU
I × 2 × 100 × (cos φ × ρ+ sin φ × Xl)
q
Three-phase submersible motor
L =
U × ΔU
I × 1.73 × 100 × (cos φ × ρ+ sin φ × Xl)
q
L Length of submersible drop cable [m]
U Rated voltage [V]
ΔU Voltage drop [%]
I Rated maximum current of the motor [A]
cos φ 0.9
ρSpecific resistance: 0.025 [Ωmm2/m]
qCross-section of submersible drop cable [mm2]
sin φ 0.436
Xl Inductive resistance: 0.078 × 10-3 [Ω/m].
Related information
6. Electrical connection
13
English (GB)

6.4 Control of single-phase MS402 motors
The single-phase MS402 motors smaller than 1.1 kW
incorporate motor protection which cuts out the motor in
case of excessive winding temperatures while the motor is
still supplied with voltage. Allow for this, when the motor
forms part of a control system.
If a compressor is included in a control system together with an
ochre filter, the compressor will run continuously once the motor
protection has cut out the motor, unless other special precautions
have been taken.
6.5 Connection of single-phase motors
6.5.1 2-wire motors
MS402 2-wire motors incorporate motor protection and a starter
device and can therefore be connected direct to the mains. See fig.
2-wire motors.
123
NL
M
1
TM001358
2-wire motors
1 Yellow and green
2 Blue
3 Brown
6.5.2 PSC motors
The PSC motors are connected to the mains via a run capacitor
which must be sized for continuous operation.
Select the correct capacitor size from the table below:
Motor
[kW]
Capacitor
[μF] 400 V, 50 Hz
0.25 12.5
0.37 16
0.55 20
0.75 30
1.10 40
1.50 50
2.20 75
MS402 PSC motors smaller than 1.1 kW incorporate motor
protection and must be connected to the mains as shown in fig.
PSC motors.
N
L
C
M
1
1234
TM001359
PSC motors
1 Yellow and green
2 Grey
3 Brown
4 Black
14
English (GB)

6.5.3 3-wire motors
MS402 3-wire single-phase motors incorporate motor protection
and must be connected to the mains via a Grundfos control box SA-
SPM 50 Hz or 60 Hz without motor protection.
MS4000, MS6000 3-wire single-phase motors must be connected
to the mains via a Grundfos SA-SPM 50 Hz or 60 Hz control box
incorporating motor protection.
When a conventional motor-protective circuit breaker is used, the
electrical connection must be carried out as described below.
N
L
C
M
1
1234
TM001359
CSIR
M
1
N L
Cs Cr
1234
TM074265
CSCR
6.6 Connection of three-phase motors
Three-phase motors must be protected. See section Three-phase
motors.
For electrical connection via the MP 204, see the separate
installation and operating instructions for this unit.
When a conventional motor-protective circuit breaker is being used,
the electrical connection must be carried out as described below.
Related information
6.1.2 Three-phase motors
6.6.1 Motors wound for direct-on-line starting
The connection of Grundfos submersible motors wound for direct-
on-line starting appears from the table below and fig. Grundfos
motors - direct-on-line starting.
Mains Cable/connection
Grundfos 4" and 6" motors
PE PE (yellow and green)
L1 U (brown)
L2 V (black)
L3 W (grey)
Check the direction of rotation as described in section Connection
of three-phase motors.
PE UVM
PE L1 L2 L3
M
3
TM032099
Grundfos motors - direct-on-line starting
Related information
6.6 Connection of three-phase motors
15
English (GB)

6.6.2 Motors wound for star-delta starting
The connection of Grundfos submersible motors wound for star-
delta starting appears from the table below and fig. Grundfos
motors wound for star-delta starting.
Connection Grundfos 6" motors
PE Yellow and green
U1 Brown
V1 Black
W1 Grey
W2 Brown
U2 Black
V2 Grey
Check the direction of rotation as described in section Connection
of three-phase motors.
PE L1 L2 L3
W2 U2 V2
U1 V1 W1
PE
M
3~
TM032100
Grundfos motors wound for star-delta starting
If direct-on-line starting is required, the motors must be connected
as shown in fig. Grundfos motors wound for star-delta starting -
direct-on-line starting.
PE L1 L2 L3
W2 U2 V2
U1 V1 W1
PE
M
3~
TM032101
Grundfos motors wound for star-delta starting - direct-on-line
starting
Related information
6.6 Connection of three-phase motors
6.6.3 MS6000P Synchronous motors requiring double cabling
PE L1
PE
L2 L3
M
U1 V1 W1
W2V2U2
3
~
TM076468
Grundfos MS6000P 37 kW and 45 kW
16
English (GB)

6.6.4 Connection in the case of unidentified cable marking/
connection
If it is unknown where the individual conductors are to be connected
to the mains in order to ensure the correct direction of rotation,
proceed as follows:
Motors wound for direct-on-line starting
Connect the pump to the mains as is expected to be right.
Then check the direction of rotation as described in section
Connection of three-phase motors.
Motors wound for star-delta starting
Determine the windings of the motor by means of an ohmmeter and
name the conductor sets for the individual windings accordingly:
U1-U2, V1-V2, W1-W2. See fig. Unidentified cable marking/
connection - motors wound for star-delta starting.
U1 U2
V1 V2
W1 W2
TM001367
Unidentified cable marking/connection - motors wound for star-
delta starting
If star-delta starting is required, connect the conductors as shown in
fig. Grundfos motors wound for star-delta starting.
If direct-on-line starting is required, connect the conductors as
shown in fig. Grundfos motors wound for star-delta starting - direct-
on-line starting.
Then check the direction of rotation as described in section
Connection of three-phase motors.
Related information
6.6 Connection of three-phase motors
6.6.2 Motors wound for star-delta starting
6.6.5 Checking the direction of rotation
The pump must not be started until the suction
interconnector has been completely submerged in the
liquid.
When the pump has been connected to the power supply, check the
direction of rotation:
1. Start the pump and measure quantity of water and head.
2. Stop the pump and interchange two phases.
3. Start the pump and measure quantity of water and head.
4. Stop the pump.
5. Compare the two results. The connection giving the larger
quantity of water and the higher head is the correct one.
6.6.6 Soft starter
Grundfos only recommends the use of soft starters which control
the voltage on all three phases and which are provided with a
bypass switch.
Ramp times: Maximum 3 seconds.
For further details, contact your soft starter supplier or Grundfos.
6.6.7 Frequency converter operation
Three-phase MS motors can be connected to a frequency
converter.
During frequency converter operation, it is not advisable to
run the motor at a frequency higher than the rated
frequency (50 or 60 Hz). In connection with pump
operation, it is important never to reduce the frequency
(and consequently the speed) to such a level that the
necessary flow of cooling liquid past the motor is no
longer ensured.
To enable the monitoring of the motor temperature,
Grundfos recommend that Pt100 or Pt1000 sensor is
installed.
If an MS motor with temperature transmitter is connected
to a frequency converter, a fuse incorporated in the
transmitter will melt and the transmitter will be inactive.
The transmitter cannot be reactivated. This means that
the motor will operate like a motor without a temperature
transmitter.
To avoid damage to the pump part, make sure that the motor stops
when the pump flow falls below 0.1 × rated flow.
Voltage peaks for Grundfos submersible motors should be limited in
accordance with the table below.
Motor type Max. U peak
voltage Max. dU/dt
MS402 650 V
phase-phase 2000 V/μs
MS4000 850 V
phase-phase 2000 V/μs
MS6000 and MS6000P 850 V
phase-phase 2000 V/μs
MMS6 850 V
phase-ground 500 V/μs
MMS8000 850 V
phase-ground 500 V/μs
MMS10000 850 V
phase-ground 500 V/μs
MMS12000 850 V
phase-ground 500 V/μs
For asynchronous motors:
Permissible frequency ranges:
• 30-50 Hz
• 30-60 Hz.
Ramp times: Maximum 3 seconds from standstill to minimum
frequency and vice versa
For synchronous motors MS6000P:
Permissible frequency ranges:
• 55-100 Hz
• 55-120 Hz.
Ramp times: Maximum 3 seconds from standstill to minimum
frequency and vice versa
Depending on the type, the frequency converter may cause
increased acoustic noise from the motor. Furthermore, it may
expose the motor to detrimental voltage peaks. This can be abated
by installing an LC filter or even better a sinus filter between the
frequency converter and the motor.
For further details, contact your frequency converter supplier or
Grundfos.
17
English (GB)

6.6.8 SPE and sine-wave filter
Grundfos SPE pump systems, consisting of one SPE pump set and
one CUE, meet the VFD and motor input requirements in the table
below. When application and grid requirements are fulfilled, a sine-
wave filter is not required.
Requirements for the MS6000P to operate without sine-wave
filter
Value Unit Grundfos SPE
systems
Application requirements
Max. media
temperature 60/140 [°C/°F] Must be met
Max. cable length 300/1000 [m/ft] Must be met
Grid requirements
Max. line-line
voltage 460 [V RMS] Must be met
Phases 3 [-] Must be met
VFD requirements
Max. DC voltage 620 [VDC]✔
Max. peak
voltage at inverter
terminals
650 [VLL]✔
Min. rise time at
VFD terminals
(10-90 % VDC)
100 [ns] ✔
Max. dU/dt at
VFD terminals 5 [V/ns] ✔
Max. switching
frequency 4 [kHz] ✔
Grid voltage
rectification Passive rectifier bridge ✔
Motor input requirements
Max. peak
voltage at
terminals
1500 [VLL]✔
Max. dU/dt at
motor terminals 6 [V/ns] ✔
• Local and national requirements regarding safety, EMI,
etc., must always be followed and can demand filtering
due to, for instance, noise suppression.
• Cables and other system components must be
properly rated for VFD use.
• If the cables are longer than 300 m/1000 ft and/or the
grid voltage is higher than 460 V, a sine-wave filter
must still be used.
7. Setting up the CUE frequency converter in an
SPE system
The SPE system consists of the following:
• SPE pump set
• CUE frequency converter.
The CUE has a start up guide. Follow the instructions on the
display.
For further information regarding safety and advanced settings, see
the CUE Installation and operating instruction.
QR96780034
Installation and operating instructions
http://net.grundfos.com/qr/i/9780034
18
English (GB)

8. Mechanical installation
WARNING
Sharp element
Death or serious personal injury
‐When mounting the facilitating pipe, wear personal
protective equipment to avoid cutting on sharp edges
on the pump.
WARNING
Contamination when pumping drinking water
Death or serious personal injury
‐Before the pump is used for supplying drinking water,
flush the pump thoroughly with clean water.
‐Do not use the pump for drinking water if the internal
parts have been in contact with particles or
substances not suitable for water intended for human
consumption.
The pump must be installed according to national water
regulations and standards.
Be careful not to ben or damage long pump sets, when
moving them from horizontal to vertical positions.
8.1 Removing and fitting the cable guard
The cable guard is screwed on to the pump, it must be removed
and fitted by means of screws. See appendix.
Make sure that the pump chambers are aligned when the
cable guard has been fitted.
8.2 Fitting of the submersible drop cable and motor
cable
Before connecting the submersible drop cable to the motor, make
sure that the cable socket is clean and dry.
To facilitate the connection of the cable, lubricate the rubber parts of
the cable plug with non-conducting silicone paste.
Tighten the screws holding the cable to the torques stated [Nm]:
MS402: 3.1 Nm
MS4000: 3.0 Nm
MS6000/MS6000P: 4.5 Nm
MMS6: 20 Nm
MMS8000: 18 Nm
MMS10000: 18 Nm
MMS12000: 15 Nm.
Connect the motor cable to the drop cable by use of original
Grundfos cable termination kits, such as shrink tube type KM or
cable termination kit type M0 to M4.
If necessary, shorten the motor cable to ensure that it is always
covered with pump medium prior to making the cable jointing as
described above.
Staybolt diameter Torque
[Nm]
5/16 UNF 18
1/2 UNF 50
M8 18
M12 70
M16 150
M20 280
Staybolt diameters and torques
19
English (GB)

8.3 Lifting the product
Grundfos recommends to fit a maximum 30 cm long pipe to the
pump to facilitate handling of the pump during installation.
Max 0.3m
A
TM076517
Lifting the pump set into vertical position
Lift the pump set by means of pipe clamps fitted to the riser pipe.
See fig. Lifting the pump set into position.
TM076518
Lifting the pump set into position
8.4 Riser pipe
WARNING
Sharp element
Death or serious personal injury
‐When mounting the riser pipe, wear personal
protective equipment to avoid cutting on sharp edges
on the pump.
If a tool, for example a chain pipe wrench, is used when the riser
pipe is fitted to the pump, the pump must only be gripped by the
pump outlet chamber.
The threaded joints on the riser pipe must all be well cut and fit
together to ensure that they do not work loose when subjected to
torque reaction caused by the starting and stopping of the pump.
The thread on the first section of the riser pipe, which is to be
screwed into the pump, must not be longer than the threads in the
pump.
Plastic pipes are recommended for 4" pumps only.
When plastic pipes are used, secure the pump by an unloaded
straining wire to be fastened to the outlet chamber of the pump. See
fig. Fixing the straining wire.
TM001368
Fixing the straining wire
When connecting plastic pipes, use a compression coupling
between the pump and the first pipe section.
From 6" to 10" there is no hook or connection eye for straining wire.
When flanged pipes are used, the flanges must be slotted to take
the submersible drop cable and a water indicator hose, if fitted.
Maximum installation pressure [mWC]
Grundfos MS402: 150
Grundfos MS4000: 600
Grundfos MS6000: 600
Grundfos MS6000P: 600
Grundfos MMS: 600
8.5 Placing in borehole
WARNING
Crushing of hands and feet
Death or serious personal injury
‐Stay clear of the wire and cable during placement in
borehole.
20
English (GB)