Grundfos SL1 Series User manual

SL1 and SLV pumps
1.1-11 kW, 50/60 Hz DIN
Installation and operating instructions
SL1 and SLV pumps
Installation and operating instructions
Other languages
http://net.grundfos.com/qr/i/96771279
GRUNDFOS INSTRUCTIONS

SL1 and SLV pumps
English (GB)
Installation and operating instructions ..................................5
Български (BG)
Упътване за монтаж и експлоатация.................................38
Čeština (CZ)
Montážní a provozní návod ........................................77
Deutsch (DE)
Montage- und Betriebsanleitung ....................................111
Dansk (DK)
Monterings- og driftsinstruktion .....................................151
Eesti (EE)
Paigaldus- ja kasutusjuhend.......................................185
Español (ES)
Instrucciones de instalación y funcionamiento...........................220
Suomi (FI)
Asennus- ja käyttöohjeet .........................................258
Français (FR)
Notice d'installation et de fonctionnement..............................292
Ελληνικά (GR)
Οδηγίες εγκατάστασης και λειτουργίας................................329
Hrvatski (HR)
Montažne i pogonske upute .......................................368
Magyar (HU)
Telepítési és üzemeltetési utasítás ..................................403
Italiano (IT)
Istruzioni di installazione e funzionamento .............................440
Lietuviškai (LT)
Įrengimo ir naudojimo instrukcija ....................................478
Latviešu (LV)
Uzstādīšanas un ekspluatācijas instrukcija .............................513
Nederlands (NL)
Installatie- en bedieningsinstructies ..................................549
Polski (PL)
Instrukcja montażu i eksploatacji....................................586
3
Table of contents

Português (PT)
Instruções de instalação e funcionamento .............................624
Română (RO)
Instrucţiuni de instalare şi utilizare...................................662
Srpski (RS)
Uputstvo za instalaciju i rad .......................................699
Русский (RU)
Паспорт, Руководство по монтажу и эксплуатации......................734
Svenska (SE)
Monterings- och driftsinstruktion ....................................775
Slovensko (SI)
Navodila za montažo in obratovanje .................................809
Slovenčina (SK)
Návod na montáž a prevádzku .....................................843
Türkçe (TR)
Montaj ve kullanım kılavuzu .......................................878
Українська (UA)
Інструкції з монтажу та експлуатації ................................912
中文 (CN)
安装和使用说明书 ..............................................950
Norsk (NO)
Installasjons- og driftsinstruksjoner ..................................983
(AR) ةيبرعلا
    ............................................1017
繁體中文 (TW)
安裝操作手冊 ................................................1050
Tiếng Việt (VI)
Hướng dẫn lắp đặt và vận hành ...................................1082
4SL1 and SLV pumps
Table of contents

English (GB) Installation and operating instructions
Original installation and operating instructions
Table of contents
1. General information ............. 5
1.1 Hazard statements .............. 5
1.2 Notes ..................... 6
1.3 Target groups ................. 6
2. Product introduction ............ 6
2.1 Product description .............. 6
2.2 Pumped liquids and intended use ...... 7
2.3 Operating conditions ............. 7
2.4 Identification.................. 8
2.5 Approvals ...................10
3. Receiving the product............12
3.1 Transporting the product ...........12
3.2 Handling and lifting the product .......12
4. Safety .....................12
4.1 Potentially explosive environments......12
5. Mechanical installation ...........14
5.1 Installation types ...............14
5.2 Torques for inlet and outlet flanges......16
6. Electrical connection ............17
6.1 Protection and control functions .......17
6.2 Wiring diagrams................19
6.3 Pump controllers ...............22
6.4 Thermal switch, Pt1000 and PTC
thermistor ...................22
6.5 Water-in-oil sensor ..............22
6.6 Moisture switch ................23
6.7 IO 113 .....................23
6.8 Frequency converter operation ........24
7. Startup ....................25
7.1 General startup procedure ..........25
7.2 Operating modes ...............25
7.3 Direction of rotation ..............27
8. Servicing the product ............27
8.1 Maintenance .................28
8.2 Dismantling the pump.............29
8.3 Assembling the pump.............31
8.4 Oil quantities .................33
8.5 Service kits ..................33
8.6 Contaminated pumps .............33
9. Storage ....................33
10. Fault finding .................34
10.1 The motor does not start. The fuses blow
or the motor-protective circuit breaker
trips immediately ...............34
10.2 The pump operates, but the motor-
protective circuit breaker trips after a
short while...................35
10.3 The thermal switch of the pump trips after
a short while..................35
10.4 The pump operates at below-standard
performance and power consumption ....35
10.5 The pump operates but gives no liquid....35
10.6 High power consumption (SLV)........35
10.7 Noisy operation and excessive vibrations
(SL1) .....................35
10.8 The pump is clogged .............36
11. Technical data ................37
12. Disposing of the product ..........37
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.
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.
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.
5
English (GB)

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.
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.
1.3 Target groups
These installation and operating instructions are
intended for professional installers.
2. Product introduction
2.1 Product description
This manual includes instructions for installation,
operation, and maintenance of Grundfos SL1 and
SLV submersible sewage and wastewater pumps
with 1.1 to 11 kW motors. The pumps are designed
for pumping domestic, municipal, and industrial
sewage and wastewater.
The following pump types are available:
•SL1 sewage pumps with S-tube® impeller
• SLV sewage pumps with SuperVortex free-flow
impeller.
The pumps can be installed on an auto-coupling
system or stand freely on the bottom of a tank.
Grundfos SL1 and SLV pumps are designed with S-
tube® or SuperVortex impellers to ensure reliable and
optimum operation.
The manual also includes specific instructions for the
explosion-proof pumps.
1
5
2
6
4
3
7
TM042648
L1 pump
Pos. Description
1 Lifting bracket
2 Nameplate
3 Oil screws
4 Outlet flange
5 Cable plug
6 Clamp
7 Pump housing
6
English (GB)

2.2 Pumped liquids and intended use
SL1 and SLV pumps are designed for pumping
the following:
• large quantities of drainage and surface water
• domestic wastewater with discharge from toilets
• wastewater with a high content of fibres
(SuperVortex impeller)
• municipal and commercial sewage and
wastewater.
2.3 Operating conditions
SL1 and SLV pumps are suitable for the following
operating situations:
•S1 operation (continuous operation), the pump
must always be covered by the pumped liquid to
the top of the motor.
•S3 operation (intermittent operation), the pump
must always be covered by the pumped liquid up
to the top of the cable entry.
S1
S3
TM042649
Stop levels
Pos. Description
1 S1 operation
2 S3 operation
pH values
SL1 and SLV pumps in permanent installations can
be used for pumping liquids with the following pH
values:
Pump
type
Material
variant Material pH value
SL1/SLV Standard
Cast-iron
impeller and
pump housing 6.5 - 141)
SL1/SLV Q
Stainless-steel
impeller and
cast-iron pump
housing
6-141)
1) For fluctuating pH values, the range is pH 4 to 14.
Liquid temperature
0-40 °C
For non-explosion-proof pumps, a temperature of up
to 60 °C is permissible for short periods (maximum 3
minutes).
Ambient temperature
-20 to +40 °C
Explosion-proof pumps must never pump
liquids of a temperature higher than +40
°C.
For explosion-proof pumps, the ambient
temperature on the installation site must
be in the range of -20 °C to +40 °C.
For explosion-proof pumps with a WIO
sensor, the ambient temperature on the
installation site must be in the range of
0-40 °C.
For non-explosion-proof pumps, the ambient
temperature may exceed +40 °C for a short period
(maximum 3 minutes).
Density and viscosity of the pumped liquid
When pumping liquids with a density and/or a
kinematic viscosity higher than water, use motors with
correspondingly higher outputs.
Flow
velocity
Keep a minimum flow velocity to avoid
sedimentation in the piping system.
Recommended flow velocities:
in vertical pipes: 0.7 m/s
in horizontal pipes: 1.0 m/s.
Free
spherical
passage
From 50 to 100 mm, depending on
pump size.
Operating
mode Maximum 20 starts per hour.
Related information
7.2 Operating modes
7
English (GB)

2.4 Identification
Nameplate
The nameplate states the operating data and
approvals applying to the pump. The nameplate is
fitted to the side of the motor housing close to the
cable entry.
Fix the extra nameplate supplied with the pump to the
cable end in the control cabinet.
3
1
2
4
5
6
7
8
9
10 11
12
14 13
15
16
18
20
22
24
19
21
23
25
26
17
TM075414
Nameplate
Pos. Description
1 Numbers of approval bodies
2 EU/IEC Explosion protection certificate No
3 UK Explosion-protection certificate No
4 Ex description
5 Type designation
6 Model number
7 Production code (year and week)
8 Enclosure class to IEC
9 Maximum installation depth
10 Maximum head
11 Maximum flow rate
12 Number of phases
13 Maximum liquid temperature
14 Rated input power
15 Shaft power
16 Rated speed
17 Power factor
18 Rated voltage, D
19 Rated current, D
Pos. Description
20 Rated voltage, Y
21 Rated current, Y
22 Frequency
23 Insulation class
24 Construction Products Regulation standard
25 Weight without cable
26 Country of production
8
English (GB)

Type key
The pump can be identified by the type designation
stated on the nameplate. Example:
SLV.80.80.40.A.Ex.4.50.0D.Q
Code Designation Explanation
SL Pump type Grundfos wastewater
pump
1Impeller type S-tube® impeller
V SuperVortex impeller
50
Free spherical
passage [mm] Maximum solids size
65
80
100
65
Pump outlet
[mm] Nominal outlet diameter
80
100
150
40 Power [kW] Output power P2/10
Blank Sensor version Standard version
A Sensor version
Blank Pump version
Non-explosion-proof
version
Ex Explosion-proof version
2Number of poles 2-pole
4 4-pole
50
60 Frequency [Hz]2) 50 Hz 60 Hz
Code Designation Explanation
0B
Voltage and
starting method
3 × 400-415 V, direct-on-
line connection
0D 3 × 380-415 V, direct-on-
line connection
1D 3 × 380-415 V, star-delta
connection
0E 3 × 220-240 V, direct-on-
line connection
1E 3 × 220-240 V, star-delta
connection
0F 3 × 220-277 V, star-delta
connection
0G 3 × 380-480 V, star-delta
connection
1F
3 × 220-277 V, delta /
380-480 V star
connection
1G 3 × 380-480 V, star-delta
connection
Blank
Generation
1st generation
A2nd generation
B3rd generation
C4th generation
Blank
Pump materials
Cast-iron impeller, pump
housing, and motor
housing
Q
Stainless-steel impeller,
cast-iron pump housing,
and motor housing
Blank Customisation
Pump in a standard
range
Z Custom-built pump
2) Maximum frequency in case of frequency converter
operation.
9
English (GB)

2.5 Approvals
SL1 and SLV pumps are tested by Dekra/KEMA. The explosion-proof versions have the following examination
certificates:
• ATEX(EU): KEMA08ATEX0125X
• IECEx: IECEx KEM08.0039X.
All certificates are issued by Dekra.
Approval standards
SL1 and SLV pumps have the following explosion protection classifications:
ATEX:
Direct-drive pump without sensor: II 2 G Ex db h IIB T4 Gb
Direct-drive pump with sensor: II 2 G Ex db eb h mb IIB T4 Gb
Pump driven by frequency converter without sensor: II 2 G Ex db h IIB T3 Gb
Pump driven by frequency converter with sensor: II 2 G Ex db eb h mb IIB T3 Gb
IECEx: IEC 60079-0:2017, IEC 60079-1:2014, IEC 60079-7:2017, IEC 60079-18:2017.
Pump without sensor: Ex db h IIB T3,T4 Gb
Pump with sensor: Ex db eb h mb T3,T4 Gb
2.5.1 Europe
Directive/standard Code Description
ATEX
CE 0344
CE marking of conformity according to the ATEX Directive 2014/34/EU.
0344 is the number of the approved body that has certified the quality
system for ATEX.
The equipment conforms to the Harmonised European standard.
II Equipment group according to the ATEX Directive, defining the
requirements applicable to the equipment in this group.
2Equipment category according to the ATEX Directive, defining the
requirements applicable to the equipment in this category.
G Explosive atmosphere caused by gases or vapours.
10
English (GB)

Directive/standard Code Description
Harmonised European
standard
Ex Marking of explosion protection.
hConstructional safety "c" and Liquid immersion "k" according to EN ISO
80079-36 and EN ISO 80079-37
db Flameproof enclosure according to EN 60079-1
eb WIO sensor protection according to EN 60079-7
mb WIO sensor insulation according to EN 60079-18
IIB Classification of gases, see EN IEC 60079-0. Gas group B includes gas
group A.
T4/T3 The maximum surface temperature is 135 °C / 200 °C according to EN
IEC 60079-0.
Gb Equipment protection level.
The standard variants are approved by TÜV LGA (approved body under the Construction Products Directive)
according to EN 12050-1 or EN 12050-2 as specified on the nameplate.
2.5.2 Australia and New Zealand
Explosion-proof variants for Australia and New Zealand are approved Ex db h IIB T3,T4 Gb (without WIO
sensor) or Ex db eb h mb T3,T4 Gb (with WIO sensor).
Standard Code Description
IEC Standard
Ex = Area classification according to IEC 60079-10-1
h = Constructional safety "c" and Liquid immersion "k" according to ISO
80079-36 and ISO 80079-37.
db = Flameproof enclosure according to IEC 60079-1.
eb = WIO sensor protection according to IEC 60079-7.
mb = WIO sensor encapsulation according to IEC 60079-18.
IIB = Classification of gases, see IEC 60079-0:2017. Gas group B includes gas
group A.
T4/T3 = Maximum surface temperature is 135 °C / 200 °C according to IEC
60079-0.
Gb = Equipment protection level.
11
English (GB)

3. Receiving the product
Before installation, make sure:
• The product corresponds to the order.
• The pump is suitable for the supply voltage and
frequency available at the installation site.
• Accessories and other equipment are not
damaged during transport.
3.1 Transporting the product
The pump may be transported and stored in a vertical
or horizontal position.
CAUTION
Crushing hazard
Minor or moderate personal injury
‐Make sure the pump cannot roll or fall
over.
3.2 Handling and lifting the product
All lifting equipment must be rated for the purpose
and checked for damage before lifting the pump. The
lifting equipment rating must under no circumstances
be exceeded. The pump weight is stated on
the nameplate.
WARNING
Crushing hazard
Death or serious personal injury
‐Always lift the pump by its lifting
bracket or by a forklift truck if the pump
is fixed on a pallet. Never lift the pump
by the power cable, hose, or pipe.
L
TM063920
Lifting bracket
Pos. Description
L Lifting bracket
4. Safety
Pump installation in tanks must be carried
out by specially trained persons.
Work in or near tanks must be carried out
according to local regulations.
Persons must not work in the installation
area when the atmosphere is potentially
explosive.
For safety reasons, all work in tanks must be
supervised by a person outside the tank.
Make all maintenance and service work
when the pump is placed outside the tank.
Tanks for submersible sewage and wastewater
pumps may contain toxic or contagious
substances. Wear appropriate personal protective
equipment and clothing. All work on and around the
pump must be carried out in strict compliance with
hygiene regulations.
WARNING
Crushing hazard
Death or serious personal injury
‐Make sure that the lifting bracket is
tightened before lifting the pump.
Carelessness during lifting or transport
may cause personal injury or damage
to the pump.
WARNING
Electric shock
Death or serious personal injury
‐Connect the pump to an external main
switch which ensures all-pole
disconnection with a contact
separation according to EN 60204 1. It
must be possible to lock the main
switch in position 0. The electrical
connection must comply with local
regulations.
4.1 Potentially explosive environments
Use explosion-proof pumps for applications in
potentially explosive environments.
SL1 and SLV pumps must under no
circumstances be used to pump explosive,
flammable, or combustible liquids.
The classification of the installation site
must be approved by the local fire-fighting
authorities.
12
English (GB)

Special conditions for safe use of SL1 and
SLV explosion-proof pumps:
1. Make sure the moisture switch and
thermal switches are connected in the
same circuit but have separate alarm
outputs (motor stop) in case of high
humidity or high temperature in the
motor.
2. Bolts used for replacement must be
class A2-70 or better according to
EN/ISO 3506-1.
3. Contact the manufacturer for
information on the dimensions of the
flameproof joints.
4. The level of pumped liquid must be
controlled by two level switches
connected to the motor control circuit.
The minimum level depends on the
installation type and is specified in this
installation and operating instructions.
5. Make sure the permanently attached
cable is suitably mechanically
protected and terminated in a suitable
terminal board placed outside the
potentially explosive area.
6. The sewage pumps have an ambient
temperature range of -20 °C to +40 °C
and a maximum process temperature
of +40 °C. The minimum ambient
temperature for a pump with a water-
in-oil (WIO) sensor is 0 °C.
7. The thermal protection in the stator
windings has a nominal switch
temperature of 150 °C and must
guarantee the disconnection of the
power supply. The power supply must
be reset manually.
8. The control unit must protect the WIO
sensor against short circuit current of
the supply to which it is connected.
The maximum current from the control
unit must be limited to 350 mA.
9. In case of frequency converter use, the
maximum surface temperature of the
pump can be 200 °C.
10. The WIO sensor is intended for use
only with a galvanically isolated circuit.
11. The lock nut of the cable connector
must only be replaced with an identical
one.
12. The WIO sensor must be connected
according to these installation
instructions.
EX pumps are equipped with a WIO
sensor optionally.
Related information
2.5 Approvals
13
English (GB)

5. Mechanical installation
Compliance with the standard EN
60079-14 is a customer responsibility.
Pump installation in tanks must be carried
out by specially trained persons. Work in
or near tanks must be carried out
according to local regulations.
Persons must not work in the installation
area when the atmosphere is potentially
explosive.
WARNING
Crushing hazard
Death or serious personal injury
‐During installation, always support the
pump by lifting chains or placing it in a
horizontal position to secure stability.
Prior to installation, make sure the tank
bottom is even.
WARNING
Electric shock
Death or serious personal injury
‐Before beginning the installation,
switch off the power supply and lock
the main switch in position 0.
‐Make sure that the power supply
cannot be switched on unintentionally.
‐Any external voltage connected to the
pump must be switched off before
working on the pump.
Further details concerning accessories can
be found in the data booklet on SL1 and
SLV pumps on www.grundfos.com.
Fix the extra nameplate supplied with the pump to the
cable end in the control cabinet.
All safety regulations must be observed at the
installation site.
Prior to installation, check the oil level in the oil
chamber.
WARNING
Crushing of hands
Death or serious personal injury
‐Do not put your hands or any tool into
the pump inlet or outlet port after the
pump is connected to the power supply
unless the pump has been switched off
by removing the fuses or switching off
the main switch. Make sure that the
power supply cannot be switched on
unintentionally. Make sure that all the
rotating parts have stopped moving.
Always use Grundfos accessories to avoid
malfunctions due to incorrect installation.
CAUTION
Crushing hazard
Minor or moderate personal injury
‐Use the lifting bracket only for lifting
the pump. Do not use it to hold the
pump during operation.
Related information
8. Servicing the product
8.1 Maintenance
5.1 Installation types
SL1 and SLV pumps are designed for the
following installation types:
• submerged installation on auto coupling
• free-standing submerged installation on a ring
stand.
14
English (GB)

5.1.1 Submerged installation on auto coupling
TM042650
Submerged installation on auto coupling
Pumps for permanent installation can be installed on
a stationary auto-coupling guide-rail system. The
auto-coupling system facilitates maintenance and
service as the pump can easily be lifted out of the
tank.
Before beginning installation procedures,
make sure that the atmosphere in the tank
is not potentially explosive.
Inspect the oil level and condition every
3000 operating hours or at least once a
year.
When the pump is new or after
replacement of the shaft seal, check the oil
level and water content after one week of
operation.
Make sure that the pipes are installed
without the use of undue force. No loads
from the weight of the pipes must be
carried by the pump. Use loose flanges to
ease the installation and to avoid pipe
tension at flanges and bolts.
Do not use elastic elements or bellows in
the pipes. These elements must never be
used to align the pipes.
Proceed as follows:
1. Drill mounting holes for the guide-rail bracket on
the inside of the tank and fasten the guide-rail
bracket with two screws.
2. Place the auto-coupling base unit on the bottom
of the tank. Use a plumb line to establish the
correct positioning. Fasten the auto coupling with
expansion bolts. If the bottom of the tank is
uneven, the auto-coupling base unit must be
supported so that it is level when being fastened.
3. Assemble the outlet pipe according to the
generally accepted procedures and without
exposing the pipe to distortion or tension.
4. Place the guide rails on the auto-coupling base
unit and adjust the length of the rails accurately to
the guide-rail bracket at the top of the tank.
5. Unscrew the provisionally fastened guide-rail
bracket. Insert the upper guide-rail bracket into
the guide rails. Fasten the guide-rail bracket on
the inside of the tank.
The guide rails must not have any axial
play as this would cause noise
during operation.
6. Clean out debris from the tank before lowering the
pump.
7. Fit the guide claw to the outlet port of the pump.
8. Slide the guide claw of the pump between the
guide rails and lower the pump into the tank by a
chain secured to the lifting bracket. When the
pump reaches the auto-coupling base unit, the
pump automatically connects.
9. Hang up the end of the chain on a suitable hook
at the top of the tank so that the chain cannot
come into contact with the pump housing.
10. Adjust the length of the power cable by coiling it
up on a relief fitting to ensure that the cable is not
damaged during operation. Fasten the relief fitting
to a suitable hook at the top of the tank. Make
sure that the cables are not sharply bent or
pinched.
11. Connect the power cable.
The free end of the cable must not be
submerged as water may penetrate
into the cable.
15
English (GB)

5.1.2 Free-standing submerged installation
on a ring stand
TM042651
Free-standing submerged installation on a ring
stand
Pumps for free-standing submerged installation must
be installed on a ring stand.
The ring stand is available as an accessory.
If a hose is used, make sure that the hose does not
buckle and the inside diameter of the hose matches
the pump outlet port.
If a rigid pipe is used, fit the parts in the following
order:
1. union or coupling
2. non-return valve
3. isolating valve.
If the pump is installed in muddy conditions or on
uneven ground, place it on a solid support.
Proceed as follows:
1. Fit a 90° elbow to the pump outlet port and
connect the outlet pipe or hose.
2. Lower the pump into the liquid by a chain secured
to the lifting bracket. Place the pump on a plain,
solid foundation. Make sure that the pump is
hanging from the chain and not the cable. Make
sure that the pump is standing securely.
3. Hang up the end of the chain on a suitable hook
at the top of the tank so the chain cannot come
into contact with the pump housing.
4. Adjust the length of the power cable by coiling it
up on a relief fitting to ensure that the cable is not
damaged during operation. Fasten the relief fitting
to a suitable hook at the top of the tank. Make
sure that the cable is not sharply bent or pinched.
5. Connect the power cable.
The free end of the cable must not be
submerged as water may penetrate into
the cable.
5.2 Torques for inlet and outlet flanges
Grade 4.6 (5) galvanised steel screws and nuts
DN DC
[mm] Screws
Specified torques
rounded off by ± 5
[Nm]
Slightly
oiled
Well
lubricated
DN 65 145 4 × M16 70 60
DN 80 160 8 × M16 70 60
DN 100 180 8 × M16 70 60
DN 150 240 8 × M20 140 120
Grade A2.50 (AISI 304) steel screws and nuts
DN DC
[mm] Screws
Specified torques
rounded off by ± 5
[Nm]
Slightly
oiled
Well
lubricated
DN 65 145 4 × M16 - 60
DN 80 160 8 × M16 - 60
DN 100 180 8 × M16 - 60
DN 150 240 8 × M20 - 120
The gasket must be a full face, reinforced
paper gasket, such as Klingersil C4300. If
softer gasket material is used, torques
must be reconsidered.
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English (GB)

6. Electrical connection
DANGER
Electric shock
Death or serious personal injury
‐Connect the pump to an external main
switch that ensures all-pole
disconnection with a contact
separation according to EN 60204-1. It
must be possible to lock the main
switch in position 0. The electrical
connection must comply with local
regulations.
The pumps must be connected to a control
box with a motor protection relay with IEC
trip class 10 or 15.
Power supply for motor protection circuit
must be low voltage, Class 2.
Related information
6.2 Wiring diagrams
6.8 Frequency converter operation
6.1 Protection and control functions
6.1.1 Level controllers
To prevent air intake, dry running, and vibrations,
install the stop level switch so the pump is stopped
before the liquid level falls below the upper edge of
the clamp.
S2
A
SR
S1
S3
TM042654
Start and stop levels
Pos. Description
A Alarm
SR Start
S1 Stop S1 operation
S2 Min. 10 cm
S3 Stop S3 operation
The pump must not run dry. Dry running
may cause ignition hazard.
Install an independent secondary level
switch to the same level to ensure that the
pump is stopped in case the primary stop
level switch is not working.
Stop level switches must be set to Stop S1
or Stop S3 levels, depending on the
operation.
6.1.2 Switches and sensors
Explosion-proof pumps are assembled with a WIO
sensor optionally. The sensor measures the water
content from 0 to 20 %. It also sends a signal if the
water content is outside the normal range (warning),
or if there is air in the oil chamber (alarm).
17
English (GB)

Pumps for hazardous locations must be
connected to a control box with a motor
protection relay with IEC trip class 10.
Do not install Grundfos control boxes,
pump controllers, Ex barriers, and the free
end of the power cable in potentially
explosive environments.
The classification of the installation site
must be approved by the local fire-fighting
authorities.
On explosion-proof pumps, make sure that
an external earth conductor is connected
to the external earth terminal on the pump
using a secure cable clamp. Clean the
surface of the external earth connection
and mount the cable clamp.
The cross-section of the earth conductor
must be at least 4 mm2, such as type H07
V2-K (PVT 90°) yellow and green.
Make sure that the earth connection is
protected from corrosion.
Make sure that all protective
equipment is connected correctly.
Float switches used in potentially
explosive environments must be approved
for this application. They must be
connected to the Grundfos LC 231 or LC
241 pump controller through the
intrinsically safe barrier to ensure a safe
circuit.
DANGER
Electric shock
Death or serious personal injury
‐If the supply cable is damaged, it must
be replaced by the manufacturer, its
service agent, or similarly qualified
persons.
Set the motor-protective circuit breaker to
the rated current of the pump. The rated
current is stated on the nameplate.
The main supply voltage and frequency are marked
on the nameplate. The voltage tolerance must be
within ±10 % of the rated voltage. Make sure that the
motor is suitable for the power supply available at the
installation site.
All pumps are supplied with 10 m cable and a free
cable end, except for pumps for Australia and New
Zealand which have 15 m cable.
Pumps without sensor must be connected to one of
the following controller types:
• a control box with a motor-protective circuit
breaker, such as a Grundfos CU 100
• a Grundfos LC 231 or LC 241 pump controller
• a Grundfos DC, DCD pump controller.
Pumps with WIO sensor must be connected to a
Grundfos IO 113 and one of the following controller
types:
• a control box with a motor-protective circuit
breaker, such as a Grundfos CU 100
• a Grundfos LC 231 or LC 241 pump controller
• a Grundfos DC, DCD pump controller.
Before installation and the first startup of
the pump, check the condition of the cable
to avoid short circuits.
6.1.3 Pumps with WIO sensor
CAUTION
Electric shock
‐For safe installation and operation of
pumps equipped with a WIO sensor,
an RC filter is recommended. If an RC
filter is installed to avoid any kind of
transient, the RC filter must be
installed between the power connector
and the pump.
The following may cause problems in case of
transients in the power supply system:
• Motor power:
- The bigger the motor, the higher the transients.
• Length of power cable:
- Where power and signal conductors are
running in parallel close to each other, the risk
of transients causing interference between the
power and signal conductors increases with
the length of the cable.
• Switchboard layout:
- Power and signal conductors must be
physically separated as much as possible.
Close installation can cause interference in
case of transients.
• Supply network "stiffness":
- If a transformer station is located close to the
installation, the supply network may be "stiff"
and transient levels may be higher.
If combinations of the above aspects are present, it
may be necessary to install RC filters for pumps with
WIO sensors to protect against transients.
Transients can be completely eliminated if soft
starters are used. Be aware that soft starters and
variable speed drives have other Electro-Magnetic
Compatibility (EMC)-related issues that must be
taken into consideration.
18
English (GB)

6.2 Wiring diagrams
WARNING
Electric shock
Death or serious personal injury
‐Make sure the earth and phase conductors are not mixed up. Make sure the earth conductor is
connected first. Make sure that the product is earthed properly.
The pumps are supplied with either a 7- or a 10-core cable. See the wiring diagrams below.
L1 L2 L3 P1 P2 P3
1 2 3 4 5 6 1 2 3 4 5 6
L1 L2 L3 P1 P2 P5
M
M
+T
WIO
A C
1 2 3 4 5 6
L1 L2 L3 P1 P2 P3
B
1 2 3 4 5 6
L1 L2 L3 P1 P2 P5
M WIO
D
Y&G
M
12
3
4
5
6
TM082914
Wiring diagram, 7-core cable, DOL
Pos. Description
Y&G Yellow and green
A Standard version with thermal switches and moisture switch
BStandard version with PTC thermistors and moisture switch3)
C Sensor version with thermal switches, Pt1000, moisture switch and WIO sensor
DSensor version with PTC thermistors, moisture switch and WIO sensor3)
3) 4 kW and larger pumps sold in Australia and New Zealand are fitted with a PTC thermistor.
19
English (GB)

A CB D
Y&G
1
9
8
7
3
4
5
2
6
L1 L2 L3 L1 L2 L3 P1 P2 P3
135462789
U1 V1 W1 U2 V2 W2
L1 L2 L3 L1 L2 L3 P1 P2 P3
135462789
U1 V1 W1 U2 V2 W2
L1 L2 L3 L1 L2 L3 P1 P2 P5
135462789
U1 V1 W1 U2 V2 W2
M
MWIO
L1 L2 L3 L1 L2 L3 P1 P2 P5
135462789
U1 V1 W1 U2 V2 W2
MWIO
+T
M
TM082915
Wiring diagram, 10-core cable, star/delta (Y/D)
Pos. Description
Y&G Yellow and green
A Standard version with thermal switches and moisture switch
BStandard version with PTC thermistors and moisture switch4)
C Sensor version with thermal switches, Pt1000, moisture switch and WIO sensor
DSensor version with PTC thermistors, moisture switch and WIO sensor4)
4) 4 kW and larger pumps sold in Australia and New Zealand are fitted with a PTC thermistor.
L1 L2 L3 P1 P2 P3 P1 P2 P3 P1 P2 P5
135462789
U1 V1 W1U2 V2 W2
L1 L2 L3
135462789
U1 V1 W1U2 V2 W2
L1 L2 L3
135462789
U1 V1 W1U2 V2 W2
A B C
P1 P2 P5
L1 L2 L3
135462789
U1 V1 W1U2 V2 W2
D
MWIO
MM
M
+T
WIO
Y&G
1
9
8
7
3
4
5
2
6
TM082906
Wiring diagram, 10-core cable, star-connected (Y)
20
English (GB)