Grundfos SP Series User manual

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

Table of contents
2
SP
English (GB)
Installation and operating instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Български (BG)
Упътване за монтаж и експлоатация . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Čeština (CZ)
Montážní a provozní návod . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Deutsch (DE)
Montage- und Betriebsanleitung . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Dansk (DK)
Monterings- og driftsinstruktion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Eesti (EE)
Paigaldus- ja kasutusjuhend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Español (ES)
Instrucciones de instalación y funcionamiento. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
Suomi (FI)
Asennus- ja käyttöohjeet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Français (FR)
Notice d'installation et de fonctionnement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
Ελληνικά (GR)
Οδηγίες εγκατάστασης και λειτουργίας . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146
Hrvatski (HR)
Montažne i pogonske upute. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161
Magyar (HU)
Telepítési és üzemeltetési utasítás . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176
Italiano (IT)
Istruzioni di installazione e funzionamento. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191
Lietuviškai (LT)
Įrengimo ir naudojimo instrukcija . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206
Latviešu (LV)
Uzstādīšanas un ekspluatācijas instrukcija . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221
Nederlands (NL)
Installatie- en bedieningsinstructies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 236
Polski (PL)
Instrukcja montażu i eksploatacji . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 251
Português (PT)
Instruções de instalação e funcionamento. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 266
Română (RO)
Instrucţiuni de instalare şi utilizare . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 281
Srpski (RS)
Uputstvo za instalaciju i rad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 296
Svenska (SE)
Monterings- och driftsinstruktion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 311
Slovensko (SI)
Navodila za montažo in obratovanje . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 326
Slovenčina (SK)
Návod na montáž a prevádzku . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 341
Türkçe (TR)
Montaj ve kullanım kılavuzu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 356

Table of contents
3
SP
Українська (UA)
Інструкції з монтажу та експлуатації . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 372
中文 (CN)
安装和使用说明书 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 387
Қазақша (KZ)
Орнату және пайдалану нұсқаулықтары . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 401
ﺔﻳﺑﺭﻌﻟﺍ (AR)
ﻝﻳﻐﺷﺗﻟﺍ ﻭ ﺏﻳﻛﺭﺗﻟﺍ ﺕﺎﻣﻳﻠﻌﺗ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 430
Tiếng Việt (VI)
Hướng dẫn lắp đặt và vận hành . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 431
Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 446
Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 450

English (GB)
4
English (GB) Installation and operating instructions
Original installation and operating instructions
CONTENTS
Page
1. Symbols used in this documentGeneral
information
1.1 Hazard statements
The symbols and hazard statements below may appear in
Grundfos installation and operating instructions, safety
instructions and service instructions.
The hazard statements are structured in the following way:
1.2 Notes
The symbols and notes below may appear in Grundfos
installation and operating instructions, safety instructions and
service instructions.
2. Introduction
These instructions apply to Grundfos submersible pumps, type
SP and SPA, with submersible motors, types Grundfos MS/MMS
or Franklin 4"-8".
If the pump is fitted with a motor of another motor make brand
than Grundfos MS or MMS, note that the motor data may differ
from the data stated in these instructions.
1. Symbols used in this documentGeneral information 4
2. Introduction 4
3. Handling and storing the productDelivery and
storage 5
3.1 Delivery 5
3.2 Storage 5
4. Applications 5
4.1 Pumped liquids 5
4.2 Sound pressure level 5
4.3 Drinking water 6
5. Preparations before installationMechanical
installation 6
5.2 Checking the motor liquid 6
5.3 Positional requirements 8
5.4 Pump/motor diameter 8
5.5 Liquid temperatures/cooling Liquid temperatures and
motor cooling) 8
5.6 Pipe connection 9
6. Electrical connection 9
6.1 Frequency converter operation 11
6.2 Motor protection 12
6.3 Lightning protection 13
6.4 Cable sizing 13
6.5 Control of single-phase MS 402 motors 14
6.6 Connection of single-phase motors 14
Connection of three-phase motors 15
7. InstallationLifting the product 16
7.1 Fitting the motor to the pump 17
7.2 Removing and fitting the cable guard 17
7.3 Fitting of theConnecting the submersible drop cable and
motor cable. 18
7.4 Riser pipe 18
7.5 Maximum installation pressuredepth below water level
[mWC] 18
7.7 Cable clips 18
7.8 Lowering the pump 18
7.9 Installation depth 19
8. Startup and operationStarting up the product 19
8.1 Startup 19
8.2 Operation 20
9. Maintenance and serviceService 20
10. Fault finding 21
11. Checking motor and cable 23
12. Disposing of hazardous or toxic materials 23
Read this document 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.
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.
SIGNAL WORD
Description of hazard
Consequence of ignoring the warning.
- Action to avoid the hazard.
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.

English (GB)
5
3. Handling and storing the productDelivery and
storage
3.1 Delivery
When the pump part and motor are supplied as separate units
(long pumps), fit the motor to the pump as described in section
7.1 Fitting the motor to the pump.
Do not expose the pump to unnecessary impact and shocks.
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.
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. 1.
Fig. 1 Pump position during storage
3.2.1 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.
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 5.3 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 ppmg/m3. A larger sand content will reduce the life of
the pump and increase the risk of blockage.
If liquids with a viscosity higher than that of water are to be
pumped, contact Grundfos.
The pump versions SP A N, SP A R, SP(E) N, SP(E) R and SPE
are designed for liquids with higher aggressiveness than drinking
water.
The maximum liquid temperature appears from section 5.5 Liquid
temperatures/cooling 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, without external
regulating valve.
Sound pressure level of motors
The sound pressure level of Grundfos MS and MMS motors is
lower than 70 dB(A).
Other motor makesbrands: See installation and operating
instructions for these motors.
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.
-Wear personal protective equipment.
The pump must remain in the packing until it is
placed in vertical position during installation.
Handle the pump with care.
The extra nameplate supplied with the pump must be
fixed at the installation site.
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.
TM00 1349 2495
Pump type Maximum content of sand
[ppm]
SP 1A - SP 5A 50
SP 7 - SP 14 150
SP 17 - SP 60 100
SP 77 - SP 215 50
When pumping liquids with a density higher than that
of water (998-1000 kg/m2), motors with
correspondingly higher outputs must be used.
Caution
When pumping liquids with a density higher than that
of water, motors with correspondingly higher outputs
must be used.
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 17
SP 30
SP 46
SP 60
SP 77
SP 95
SP 125 79
SP 160 79
SP 215 82

English (GB)
6
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.
• In case of maintenance, be sure to always use original parts to
maintain the initial hygienic characteristics of the product.
5. Preparations before installationMechanical
installation
5.1
Fig. 2 Handling of the motor
5.2 Checking the motor liquid
The motors are factory-filled with a special FDA approved
non-toxicpoisonous liquid which is frost-proof down to -20 °C.
Refill liquid as described below.
5.2.1 Grundfos MS 40200 and MS 40002 motors
The filling hole for motor liquid is placed in the following positions:
• MS 4000: on the side of the motor near the topin the top of the
motor.
• MS 402: in the bottom of the motor.
1. Position the submersible pump as shown in fig. 3. 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. 3.
4. Replace the screw in the filling hole and tighten securely
before changing the position of the pump.
Torques
• MS 4000: 3.0 Nm.
• MS 402: 2.0 Nm.
The submersible pump is now ready for installation.
Fig. 3 Motor position during filling - MS 4000 and MS 402
5.2.2 Grundfos MS 6000 motors
•If the motor is delivered from stock, the liquid level must be
checked before the motor is installed. See fig. 4.
•In the case of service, the liquid level must be checked. See
fig. 4.
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. 4. 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. 4) 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.
•If the motor is delivered from stock, check the level of motor
liquid before fitting the motor to the pump. See fig. 4.
•When pumps are delivered direct from Grundfos, the level has
already been checked.
•Check the level in connection with service. See fig. 4.
The filling hole for motor liquid is placed at the top of the motor.
1. Position the submersible pump as shown in fig. 4. 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. 4.
4. Replace the screw in the filling hole and tighten securely
before changing the position of the pump.
Torque: 3.0 Nm.
The submersible pump is now ready for installation.
DANGER
Electric shock
Death or serious personal injury
-Switch off the power supply before you start 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.
Grundfos recommends fitting a 50 cm long pipe to
the pump to facilitate handling of the pump during
installation.
TM05 9648 4213
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.
TM03 8128 05070 6423 0606
MS 4000 MS 402

English (GB)
7
Fig. 4 Motor position during filling - MS 6000
5.2.3 Grundfos MMS 6, MMS 8000, MMS 10000 and MMS
12000 motors
Filling procedure:
Place the motor at a 45 ° angle with the top of the motor upwards.
See fig. 5.
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).
1. Place the motor at a 45 ° angle with the top of the motor
upwards. See fig. 5.
2. Unscrew the plug A and place a funnel in the hole.
3. Pour tap water into the motor until the motor liquid inside the
motor starts running out of A.
4. Remove the funnel and refit the plug A.
The submersible motor is now ready for assembly with the pump
and ready for installation.The submersible pump is now ready for
installation.
Fig. 5 Motor position during filling - MMS
5.2.4 Franklin motors from 3 kW and up
Check the level of motor liquid in Franklin 4" and 6" motors by
measuring the distance from the bottom plate to the built-in
rubber diaphragm. The distance can be measured by inserting a
rule or a small rod through the hole until it touches the diaphragm.
See fig. 6.
Fig. 6 Measuring the distance from bottom plate to
diaphragm
The table below shows the correct distance from the outside of
the bottom plate to the diaphragm:
Fig. 7 Franklin motors
If the distance is not correct, carry out an adjustment as
described in section 5.2.5 Franklin motors.
TM03 8129 0507
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.
TM03 0265 3605
Caution
Take care not to damage the diaphragm.
45°
45°
A
TM00 1353 5092
Motor Dimension Distance
[mm]
Franklin 4", 0.25 - 3 kW
(fig. 7a) A 8
Franklin 4", 3 - 7.5 kW
(fig. 7b) B16
Franklin 6", 4-45 kW
(fig. 7c) C1 35
Franklin 6", 4-22 kW
(fig. 7d) C2 59
TM00 6422 3695
6a 6b
6c 6d

English (GB)
8
5.2.5 Franklin motors
Check the level of motor liquid in Franklin 8" motors as follows:
1. Press out the filter in front of the valve at the top of the motor
using a screwdriver. If the filter is slotted, unscrew. Figure 8
shows the position of the filling valve.
2. Press the filling syringe against the valve and inject the liquid.
See fig. 8. If the valve cone is depressed too far, it may be
damaged thus causing the valve to leak.
3. Remove any air in the motor by pressing the point of the filling
syringe lightly against the valve.
4. Repeat the process of injecting liquid and releasing air until
the liquid starts running out or the diaphragm is in its correct
position (Franklin 4" and 6").
5. Refit the filter.
The submersible pump is now ready for installation.
Fig. 8 Position of filling valve
5.3 Positional requirements
The motor can be installed either vertically or horizontally.
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 5.3.1 Motors suitable
for horizontal installation.
If the pump is installed horizontally, the outlet port must never fall
below the horizontal plane. See fig. 9.
Fig. 9 Positional requirements
If the pump is installed horizontally, e.g. in a tank, we recommend
that you fit it in a flow sleeve.
5.3.1 Motors suitable for horizontal installation
When Franklin 4" motors up to and including 2.2 kW are started
more than 10 times a day, we recommend that you incline the
motor at least 15 ° above the horizontal plane in order to minimise
wearing of the upthrust disc.
5.4 Pump/motor diameter
We recommend that you check the borehole with an inside
calliper to ensure unobstructed passage.
5.5 Liquid temperatures/cooling Liquid temperatures
and motor cooling)
The maximum liquid temperature and the minimum flow velocity
past the motor appear from the table below.
We recommend that you install the motor above the well screen
in order to achieve proper 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.
If there is a risk of sediment build-up, such as sand, around the
motor, use a flow sleeve in order to ensure proper cooling of the
motor.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.
TM00 1354 5092
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.
TM00 1355 5092
Allowed
Not allowed
Motor
Output power
50 Hz
Output power
60 Hz
[kW] [kW]
MS All All
MMS 6 5.5 - 37 5.5 - 37
MMS 8000 22-92110 22-92110
MMS 10000 75-170190 75-170190
MMS 12000 147-190250 147-250
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.
In cases where the stated flow velocity cannot be
achieved, a flow sleeve must be installed.

English (GB)
9
5.5.1 Maximum liquid temperature
Out of consideration for the rubber parts in pump and motor, the
liquid temperature must not exceed 40 °C (105 °F). See also the
table below.
The pump can operate at liquid temperatures between 40 °C and
60 °C (105 °F and 140 °F) provided that all rubber parts are
replaced every third year.
*At an ambient pressure of minimum 1 bar (0.1 MPa).
**At an ambient pressure of minimum 2 bar (0.2 MPa). 5.6 Pipe connection
If noise may be transmitted to the building through the pipeswork,
we recommend that you use plastic pipes.
When using plastic pipes, secure the pump by an unloaded
straining wire.
When connecting plastic pipes, use a compression coupling
between the pump and the first pipe section.
6. Electrical connection
Motor
Installatio
n
Flow past
the motor
[m/s] Vertical Horizontal
MS 402
MS 4000 (T40)
MS 6000 (T40) 0.15 40 °C
(105 °F) 40 °C (105 °F)
MS 4000I (T60)*
MS 6000 (T60)* 1.00
60 °C
(140 °F)
Flow sleeve
recommended
60 °C
(140 °F)
Flow sleeve
recommended
MS 6000 (T60)** 0.15
60 °C
(140 °F)
Flow sleeve
recommended
60 °C
(140 °F)
Flow sleeve
recommended
MMS6
PVC
windings
0.15 25 °C
(86 °F) 25 °C (86 °F)
0.50 30 °C
(95 °F) 30 °C (95 °F)
PE/PA
windings
0.15 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)
Motor Flow past
the motor Vertical Horizontal
Grundfos
MS 402
MS 4000
MS 6000
0.15 m/s 40 °C
(105 °F)
40 °C
(105 °F)
Grundfos
MS 4000I* 0.15 m/s 60 °C
(140 °F)
Flow sleeve
recommended
60 °C
(140 °F)
Flow sleeve
recommended
Grundfos
MS 6000I* 1.00 m/s
Grundfos
MMS
0.15 m/s 25 °C
(77 °F)
25 °C
(77 °F)
0.50 m/s 30 °C
(86 °F)
30 °C
(86 °F)
Franklin 4" 0.08 m/s 30 °C
(85 °F)
30 °C
(85 °F)
Franklin 6"
and 8" 0.16 m/s 30 °C (85 °F)
30 °C
(85 °F)
*At an ambient pressure of minimum 1 bar (1 MPa).
For 37 kW MMS6 (only PVC windings), 110 kW MMS
8000 and 170 kW MMS 10000, the maximum liquid
temperature is 5 °C lower than the values stated in
the above table. For 190 kW MMS 10000, 220-250
kW MMS 12000/50 Hz and MMS 12000/60 Hz, the
temperature is 10 °C lower. Plastic pipes are recommended for 4" pumps only.
Note
We recommend plastic pipes for 4" pumps only.
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.
DANGER
Electric shock
Death or serious personal injury
-Switch off the power supply before you start any
work on the product.
-Make sure that the power supply cannot be
accidentally switched on.

English (GB)
10
The supply voltage, rated maximum current and cos φ appear
from the loose dataseparate 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 section 11. Checking motor and cable, item 2.
If MS motors with a built-in temperature transmitter (Tempcon)
are not installed together with an MP 204 or similar Grundfos
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. 10.
Fig. 10 Connection of capacitor
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.
DANGER
Electric shock
Death or serious personal injury
-The pump must be earthed.
-The pump must be connected to an external main
switch with a minimum contact gap of 3 mm in all
poles.
The electrical connection must be carried out by an
authorised person in accordance with local
regulations.
TM00 7100 0696
Colours of the leads conductors
LeadConductor Flat cable Single
leadsconductors
1 = L1 Brown Black
2 = L2 Black Yellow
3 = L3 Grey Red
4 = PE Yellow and green Green

English (GB)
11
6.1 Frequency converter operation
6.1.1 Grundfos motors
Three-phase Grundfos motors can be connected to a frequency
converter.
If a temperature transmitter is required, Grundfos offers a Pt100
or Pt1000 sensor for the submersible motor.
To avoid damage to the pump part, the motor must stop when the
pump flow falls below 0.1 x nominalflow
Depending on the frequency converter type, it may expose the
motor to detrimental voltage peaks.
To avoid damage to the pump part, make sure that the motor stops when
the pump flow falls below 0.1 x rated flow.
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 avoided by installing a correctly dimensioned sinus filter
between the frequency converter and the motor.
Grundfos recommends installing a sinus filter when a frequency converter
is used.
Voltage peaks for Grundfos submersible motors should be limited in
accordance with the table below.
Permissible frequency ranges: 30-50 Hz and 30-60 Hz.
Ramp times: Maximum 3 seconds for start and stop.
We recommend that you protect other motors against voltage
peaks higher than 850 V.
The above disturbance can be abated by installing an RC filter
between the frequency converter and the motor.
Possible increased acoustic noise from the motor can be abated
by installing an LC filter which will also eliminate voltage peaks
from the frequency converter.
We recommend that you install an LC filter when using a
frequency converter. See section 6.7.5 Frequency converter
operation.
For further details, contact your frequency converter supplier or
Grundfos.
6.1.2 Other motor makes than Grundfos
Contact Grundfos or the motor manufacturer.
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.
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.
Motor type Max. Upeak
voltage Max. dU/dt
MS 402 650 V
phase-phase 2000 V/μs
MS 4000 850 V
phase-phase 2000 V/μs
MS 6000 850 V
phase-phase 2000 V/μs
MMS6 850 V
phase-ground 500 V/μs
MMS 8000 850 V
phase-ground 500 V/μs
MMS 10000 850 V
phase-ground 500 V/μs
MMS 12000 850 V
phase-ground 500 V/μs
To enable monitoring of the motor temperature when running
at frequency converter operation, Grundfos recommends
installing a Pt100 sensor together with a PR 5714 relay.

English (GB)
12
6.2 Motor protection
6.2.1 Single-phase motors
Single-phase MS 402 motors incorporate a thermal switch and
require no additional motor protection.. As an exception, the 1.1
kW (1.5 hp) MS 402 requires external current protection.
Single-phase MS 4000 motors must be protected. A protective
device can either be incorporated in a control box or be separate.
Franklin 4" PSC motors must be connected to a motor-protective
circuit breaker.
6.2.2 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).
MS motors are available with or without a built-in temperature
transmitter.
The following motors must be protected by a motor-protective
circuit breaker with thermal relay, or a MP 204 and contactor(s):
•motors with a built-in and intact temperature transmitter
•motors with or without a defective temperature transmitter
•motors with or without a Pt100 sensor.
MMS motors have no built-in temperature transmitter. The Pt100
and the Pt1000 sensor are available as an accessory.
6.2.3 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).
For cold motors, the tripping time of the motor-protective circuit
breaker must be less than 10 seconds at 5 times the rated
maximum current of the motor. During normal operating
conditions the motor must be running at full speed in less than 3
seconds.
In order to ensure optimum motor protection of the submersible
motor, set the motor-protective circuit breaker in accordance with
the followingmust be set as follows:
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 x 0.58.
The highest permissible startup time for star-delta starting or
autotransformer starting is 2 seconds.
DANGER
Electric shock
Death or serious personal injury
-Switch off the power supply before you start 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 you start any
work on the product.
-Make sure that the power supply cannot be
accidentally switched on.
If this requirement is not met, the motor warranty will
be invalidated.

English (GB)
13
6.3 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.
11.The installation can be fitted with a special overvoltage
protective device to protect the motor from voltage surges in the
power supply lines when lightning strikes somewhere in the area.
See fig. 11.
Fig. 11 FittingConnecting an overvoltage protective device
The overvoltage protective device will not, however, protect the
motor against a direct stroke of lightning.
Connect Tthe overvoltage protective device must be connected to
the installation as close as possible to the motor and always in
accordance with local regulations. Ask Grundfos for lightning
protective devices.
MS 402 motors, however, require no further lightning protection
as they are highly insulated.
A special cable termination kit with a built-in overvoltage
protective device is available for Grundfos 4" motors (product No
799911 or 799912).
6.4 Cable sizing
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. For correct cable sizing, Grundfos offers a cable
sizing tool on the USB stick supplied with the motorA cable sizing
tool id available on Grundfos Insite at:
https://www.grundfos.com/sp-system/download-sp-app-html..
Fig. 12 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.
You can calculate tThe 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 6. Electrical connection.
Determine the voltage drop for the cross-section of the
submersible drop cable by means of the diagrams on pages 446
to 449.
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 times x 0.58.
Lx: length of cable converted to a voltage drop of 1 % of the
nominal voltage.
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
Three-phase submersible motor
TM00 1357 3605
Submersible motor cables are dimensioned for
submersion in liquid, and will not necessarily have
sufficient cross-section to be in free air.
TM07 6259 12205 8770 2613
825045 825017
L1
L2
PE
L3
L
PE
N
Three-phase Single-phase
Lx = length of drop cable
permissible voltage drop in %
L = U × ΔU
I × 2 × 100 ×
L = U × ΔU
I × 1.73 × 100 ×
L Length of submersible drop cable [m]
U Rated voltage [V]
ΔU Voltage drop [%]
I Rated maximum current of the motor [A]
cos φ0.9
ρ Specific resistance: 0.02 [Ωmm2/m]
q Cross-section of submersible drop cable [mm2]
sin φ0.436
Xl Inductive resistance: 0.078 x 10-3 [Ω/m].
cos 
q
---
 sin XI+


cos 
q
---
 sin XI+



English (GB)
14
6.5 Control of single-phase MS 402 motors
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.
6.6 Connection of single-phase motors
6.6.1 2-wire motors
MS 402 2-wire motors incorporate motor protection and a starter
device and can therefore be connected direct to the mains. See
fig. 13.
Fig. 13 2-wire motors
6.6.2 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:
MS 402 PSC motors smaller than 1.1 kW incorporate motor
protection and must be connected to the mains as shown in fig.
14.
Fig. 14 PSC motors
See www.franklin-electric.com and fig. 15.
Fig. 15 Franklin motors
6.6.3 3-wire motors
MS 402 3-wire motors incorporate motor protection and must be
connected to the mains via a Grundfos control box SA-SPM 5,7
or 8 without motor protection.
MS 4000, MS 6000 3-wire motors must be connected to the
mains via a Grundfos SA-SPM 5 (60 Hz), 7 or 8 (50 Hz) control
box incorporating motor protection.
MS 402 3-wire motors incorporate motor protection and must be
connected to the mains via a Grundfos control box SA-SPM 2, 3
or 5 (60 Hz), 7 or 8 (50 Hz) without motor protection.
When a conventional motor-protective circuit breaker is used, the
electrical connection must be carried out as described below.
The single-phase MS 402 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.
Warning
The single-phase MS 402 motor incorporates 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.
TM00 1358 5092
1 Yellow and green
2Blue
3Brown
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
23
1
TM00 1359 5092
1 Yellow and green
2Grey
3Brown
4Black
TM00 1361 1200
1Yellow and green
2Grey
3Brown
4Black
23
14
C
LN
M
1
4
2
3

English (GB)
15
Fig. 16 CSIR
Fig. 17 CSCR
Connection of three-phase motors
Three-phase motors must be protected. See section
6.2.2 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.
6.6.4 Checking the direction of rotation
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.
6.7 Connection of three-phase motors
Three-phase motors must be protected. See section
6.2.2 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.
6.7.1 Grundfos mMotors 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. 18.
Check the direction of rotation as described in section
6.6.4 Checking the direction of rotation.
Fig. 18 Grundfos motors - direct-on-line starting
TM072 4264 1219TM07 4265 1219
The pump must not be started until the suction
interconnector has been completely submerged in
the liquid.
M
1
NL
Cs
1234
1234
M
1
NL
Cs Cr
1234
Mains Cable/connection
Grundfos 4" and 6" motors
PE PE (yellow and green)
L1 U (brown)
L2 V (black)
L3 W (grey)
TM03 2099 3705
L1
PE WVU
PE
M
L3L2
3

English (GB)
16
6.7.2 Grundfos mMotors wound for- star-delta starting
The connection of Grundfos submersible motors wound for
star-delta starting appears from the table below and fig. 19.
Check the direction of rotation as described in section
6.6.4 Checking the direction of rotation.
Fig. 19 Grundfos motors wound for star-delta starting
If direct-on-line starting is required, the motors must be
connected as shown in fig. 20.
Fig. 20 Grundfos motors wound for star-delta starting -
direct-on-line starting
6.7.3 Connection in the case of unidentified cable
marking/connection (Franklin motors)
If you do not knowit is unknown where the individual leads
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
6.6.4 Checking the direction of rotation.
Motors wound for star-delta starting
Determine the windings of the motor by means of an ohmmeter
and name the lead conductor sets for the individual windings
accordingly: U1-U2, V1-V2, W1-W2. See fig. 21.
Fig. 21 Unidentified cable marking/connection - motors wound
for star-delta starting
If star-delta starting is required, connect the leads conductors as
shown in fig. 19.
If direct-on-line starting is required, connect the leads conductors
as shown in fig. 20.
Then check the direction of rotation as described in section
6.6.4 Checking the direction of rotation.
6.7.4 Soft starter
WeGrundfos 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.
6.7.5 Frequency converter operation
Three-phase MS motors can be connected to a frequency
converter.
Permissible frequency ranges: 30-50 Hz and 30-60 Hz.
Ramp times: Maximum 3 seconds for start and stop.
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.
7. InstallationLifting the product
.
Connection Grundfos 6" motors
PE Yellow and green
U1 Brown
V1 Black
W1 Grey
W2 Brown
U2 Black
V2 Grey
TM03 2100 3705TM03 2101 3705
L2L1
M
L3PE
W2 U2 V2
PE U1 W1V1
3
L2L1
M
L3PE
W2 U2 V2
PE U1 W1V1
3
TM00 1367 5092
To enable the monitoring of the motor temperature,
we recommend that Pt100 sensor together with a
PR5714 or CU 220 (50 Hz) is installed.
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.

English (GB)
17
We Grundfos recommend that you first fit fitting a 50 cm long pipe
to the pump to facilitate handling of the pump during installation.
Fig. 22 Lifting the pump into vertical position
7.1 Fitting the motor to the pump
When the pump part and the motor are supplied as separate units
(long pumps), fit the motor to the pump as follows:
1. Use pipe clamps when handling the motor
CMR???
2. Place the motor in vertical position at the borehole seal. See
fig. 23.
Fig. 23 Motor in vertical position
3. Lift the pump part by means of pipe clamps fitted to the
extension riser pipe. See fig. 24.
Fig. 24 Lifting the pump into position
4. Place the pump part on top of the motor.
5. Fit and cross-tighten the nuts to the torques stated. See table
below.
The bolts and nuts securing the straps to the pump must be
cross-tightened to the following torques:
When fitting the motor to the pump part, cross-tighten the nuts to
the following torques:
7.2 Removing and fitting the cable guard
If the cable guard is screwed on to the pump, it must be removed
and fitted by means of screws.
CAUTION
Description of hazard
Minor or moderate personal injury
-Lift the pump to vertical position before removing it
from the wooden box.
TM05 1617 3311
DANGER
Electric shock
Death or serious personal injury
-Switch off the power supply before you start any
work on the product.
-Make sure that the power supply cannot be
accidentally switched on.
WARNING
XXX
Death or serious personal injury
-When the motor is to be assembled with the pump
at the borehole, make sure to use suitable pipe
clamps.
TM02 5259 2402
TM02 5263 2502
Make sure that the coupling between the pump and
motor engages properly.
Bolt/nut Torque
[Nm]
M8 18
M10 35
M12 45
M16 120
Staybolt diameter Torque
[Nm]
5/16 UNF 18
1/2 UNF 50
M8 18
M12 70
M16 150
M20 280
Make sure that the pump chambers are aligned when
the cable guard has been fitted.

English (GB)
18
7.3 Fitting of theConnecting the submersible drop
cable and motor cable.
Grundfos motors
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 these torques stated[Nm]:
MS 402: 3.12.0
MS 4000: 3.0
MS 6000: 4.5
MMS 6: 20
MMS 8000: 18
MMS 10000: 18
MMS 12000: 15
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.
7.4 Riser pipe
If a tool, for example e.g. 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.
If noise may be transmitted to the building through the pipework,
we recommend that you use plastic pipes.
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. 25.
Fig. 25 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 no hook/connection eye for straining wire.
Whenre flanged pipes are used, the flanges must be slotted to
take the submersible drop cable and a water indicator hose, if
fitted.
7.5 Maximum installation pressuredepth below water
level [mWC]
Grundfos MS 402: 150
Grundfos MS 4000: 600
Grundfos MS 6000: 600
Grundfos MMS: 600
Franklin motors: 350
7.6 Placing in borehole
7.7 Cable clips
Fit cable clips every 3 metres to fix the submersible drop cable
and the straining wire, if fitted, to the riser pipe of the pump.
Grundfos supplies cable clip sets on request.
1. Cut off the rubber band so that the piece with no slit becomes
as long as possible.
2. Insert a button in the first slit.
3. Position the wire alongside the submersible drop cable as
shown in fig. 26.
Fig. 26 Fitting the cable clips
4. Wind the band once around the wire and the cable. Then wind
it tightly at least twice around the pipe, wire and the cable.
5. Push the slit over the button, and cut off the band.
Whenre cables with a large cable cross-sections are used, it will
be necessary to wind the band several times.
Whenre plastic pipes are used, some slackness must be left
between each cable clip as plastic pipes expand when loaded.
When flanged pipes are used, the cable clips must be fitted
above and below each joint.
7.8 Lowering the pump
Grundfos We recommends that you checking the borehole by
means of an inside calliper before lowering the pump to ensure
unobstructed passage.
Lower the pump carefully into the borehole, taking care not to
damage the motor cable and the submersible drop cable.
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.
Plastic pipes are recommended for 4" pumps only..
TM00 1368 2298
WARNING
Crushing of hands and feet
Death or serious personal injury
-Stay clear of the wire and cable during placement
in borehole.
TM00 1369 5092
Do not lower or lift the pump by means of the motor
cable.

English (GB)
19
7.9 Installation depth
The dynamic water level must always be above the suction
interconnector of the pump. See section 5.3 Positional
requirements and fig. 27.
Minimum inlet pressure is indicated in the NPSH curve for the
pump. The minimum safety margin must be 1 metre head.
We recommend that you install the pump so that the motor part is
above the well screen in order to ensure optimum cooling. See
section 5.5 Liquid temperatures/cooling Liquid temperatures and
motor cooling).
When the pump has been installed to the required depth, the
installation must be finished by means of a borehole seal.
Slacken Loosen the straining wire so that it becomes unloaded
and lock it to the borehole seal by means of wire locks.
8. Startup and operationStarting up the product
8.1 Startup
When the pump has been connected correctly and it is
submerged in the liquid to be pumped, it must be started with the
outlet valve closed off to approximately 1/3 of its maximum
volume of water.
Check the direction of rotation as described in section
6.6.4 Checking the direction of rotation.
If there are impurities in the water, open the valve gradually as
the water becomes clearer. Do not stop the pump until the water
is completely clean, as otherwise the pump parts and the
non-return valve may become blocked.
As the valve is being opened, check the drawdown of the water
level to ensure that the pump always remains submerged.
The dynamic water level must always be above the suction
interconnector of the pump. See section 5.3 Positional
requirements and fig. 27.
Fig. 27 Comparison of various water levels
L1: Minimum installation depth below dynamic water level. We
recommend minimum 1 metre0.5m or according to NPSH -
curve for the relevant pump.
L2: Depth to dynamic water level.
L3: Depth to static water level.
L4: Drawdown. This is the difference between the dynamic and
the static water levels.
L5: Installation depth.
If the pump can pump more than yielded by the well, we
recommend that you install the Grundfos MP 204 motor protector
or some other type of dry-running protection.
If no water level electrodes or level switches are installed, the
water level may be drawn down to the suction interconnector of
the pump and the pump will then draw in air.
For pumps fitted with plastic pipes, the expansion of
the pipes when loaded must be taken into
consideration, when deciding on the installation
depth of the pump.
DANGER
Electric shock
Death or serious personal injury
-The pump must be connected to protective earth.
-Switch off the power supply before you start any
work on the product.
-Make sure that the power supply cannot be
accidentally switched on.
TM00 1041 3695
Long time of operation with water containing air may
damage the pump and cause insufficient cooling of
the motor.
L2 L3
L1
L5
L4

English (GB)
20
8.2 Operation
8.2.1 Minimum flow rate
To ensure the necessary cooling of the motor, the pump flow rate
velocity must never be set so low that the cooling requirements in
section 5.5 Liquid temperatures/cooling Liquid temperatures and
motor cooling) cannot be met.
8.2.2 Operating range
Pump must never run outside rated pump curve - see Data
Booklet.
8.2.3 Frequency of starts and stops
9. Maintenance and serviceService
All pumps are easy to service.
Service kits and service tools are available from Grundfos.
The pumps can be serviced at a Grundfos service centre.
Additional service documentation including service videos are
available in Grundfos Product Center >
http://product-selection.grundfos.com/.
If Grundfos is requested to service the pump, Grundfos must be
contacted with details about the pumped liquid, etc. before the
pump is returned for service. Otherwise Grundfos can refuse to
accept the pump for service.
Possible costs of returning the pump are paid by the customer.
Motor type Number of starts
MS 402
•Grundfos We recommends
minimum 1 per year.
• Maximum 100 per hour.
• Maximum 300 per day.
MS 4000
•GrundfosWe recommends
minimum 1 per year.
• Maximum 100 per hour.
• Maximum 300 per day.
MS 6000
•GrundfosWe recommends
minimum 1 per year.
• Maximum 30 per hour.
• Maximum 300 per day.
MMS6
PVC windings
•GrundfosWe recommends
minimum 1 per year.
• Maximum 3 per hour.
• Maximum 40 per day.
PE/PA windings
•GrundfosWe recommends
minimum 1 per year.
• Maximum 10 per hour.
• Maximum 70 per day.
MMS 8000
PVC windings
•GrundfosWe recommends
minimum 1 per year.
• Maximum 3 per hour.
• Maximum 30 per day.
PE/PA windings
•GrundfosWe recommends
minimum 1 per year.
• Maximum 8 per hour.
• Maximum 60 per day.
MMS 10000
PVC windings
•GrundfosWe recommends
minimum 1 per year.
• Maximum 2 per hour.
• Maximum 20 per day.
PE/PA windings
•GrundfosWe recommends
minimum 1 per year.
• Maximum 6 per hour.
• Maximum 50 per day.
MMS 12000
PVC windings
•GrundfosWe recommends
minimum 1 per year.
• Maximum 2 per hour.
• Maximum 15 per day.
PE/PA windings
•GrundfosWe recommends
minimum 1 per year.
• Maximum 5 per hour.
• Maximum 40 per day.
DANGER
Electric shock
Death or serious personal injury
-Switch off the power supply before you start any
work on the product.
-Make sure that the power supply cannot be
accidentally switched on.
DANGER
Toxic or radio active liquidmaterial
Death or serious personal injury
-If a pump has been used for a liquid which is
injurious to health or toxic, the pump will be
classified as contaminated.
DANGER
Magnetic field
Death or serious personal injury
-Do not handle the motor or the rotor if having a
pacemaker.
WARNING
Sharp element
Death or serious personal injury
-For service - see service instructions. Must be
performed by qualified persons.