Grundfos SE1 50 User manual

SE1 50, 80, 100
SEV 65, 80, 100
Installation and operating instructions
50 Hz
GRUNDFOS INSTRUCTIONS

English (GB)
2
English (GB) Installation and operating instructions
Original installation and operating instructions
These installation and operating instructions
describe Grundfos SE1, SEV pumps, 1.1 - 11 kW.
Sections 1-5 give the information necessary to be
able to unpack, install and start up the product in a
safe way.
Sections 6-11 give important information about the
product, as well as information on service, fault
finding and disposal of the product.
CONTENTS
Page
1. General 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. General information 2
1.1 Hazard statements 2
1.2 Notes 3
2. Receiving the product 3
2.1 Transportation 3
3. Installing the product 3
3.1 Mechanical installation 4
3.2 Electrical connection 8
4. Starting up the product 13
4.1 Checking the direction of rotation 14
4.2 Startup 14
5. Handling and storing the product 15
5.1 Handling 15
5.2 Storing the product 15
6. Product introduction 16
6.1 Product description 16
6.2 Applications 16
6.3 Pumped liquids 16
6.4 Potentially explosive environments 16
6.5 Identification 17
6.6 Installation types 18
6.7 Approvals 19
7. Protection and control functions 21
7.1 Pump controllers 21
7.2 Level controllers 21
7.3 Switches and sensors 23
8. Servicing the product 24
8.1 Maintenance schedule 25
8.2 Checking and changing the oil 25
8.3 Cleaning and inspecting the pump 26
8.4 Repairing the product 27
8.5 Spare parts 29
8.6 Contaminated pumps 29
9. Fault finding the product 30
10. Technical data 32
10.1 Operating conditions 32
10.2 Dimensions and weights 32
10.3 Storage temperature 32
10.4 Electrical data 32
11. Disposing of the product 32
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.

English (GB)
3
1.2 Notes
The symbols and notes below may appear in
Grundfos installation and operating instructions,
safety instructions and service instructions.
2. Receiving the product
When receiving the product, carry out these checks:
• Does the pump correspond to the order?
• Is the pump suitable for the supply voltage and
frequency available at the installation site?
• Are accessories and other equipment
undamaged?
Fix the extra nameplate supplied with the pump at
the installation site or keep it in the cover of this
booklet.
2.1 Transportation
The pump may be transported and stored in a
vertical or horizontal position. Make sure that it
cannot roll or fall over.
3. Installing the product
All safety regulations must be observed at the
installation site, such as the use of blowers for fresh-
air supply to the pit.
Prior to installation, check the oil level in the oil
chamber. See section 8.2 Checking and changing
the oil.
For safety reasons, all work in pits must be
supervised by a person outside the pump pit.
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.
WARNING
Crushing hazard
Death or serious personal injury
- Check that the screws of the lifting
bracket are tightened before attempting
to lift the pump. Tighten, if necessary.
- Always lift the pump by its lifting bracket
or by means of a fork-lift truck if the
pump is fixed on a pallet.
- Never lift the pump by the power cable
or the hose or the pipe.
Pump installation in pits must be carried
out by specially trained persons.
Work in or near pits must be carried out
according to local regulations.
WARNING
Crushing hazard
Death or serious personal injury
- Do not stand near or under the pump
when it is lifted.
Persons must not enter the installation
area when the atmosphere is explosive.
WARNING
Electric shock
Death or serious personal injury
- It must be possible to lock the main
switch in position 0. Type and
requirements as specified in EN 60204-
1.
We recommend that you make all
maintenance and service work when the
pump is placed outside the pit.

English (GB)
4
3.1 Mechanical installation
When mounted on a base stand or brackets, the
pump must be installed outside the pit. An inlet line
must be connected to the pump.
A dimensional sketch for each individual installation
type can be found at the end of this booklet.
3.1.1 Lifting the pump
All lifting equipment must be rated for the purpose
and checked for damage before any attempts to lift
the pump. The lifting equipment rating must under no
circumstances be exceeded. The pump weight is
stated on the pump nameplate.
Carelessness during lifting or transportation may
cause injury to persons or damage to the pump.
For horizontal, dry-installed pumps, a special lifting
bracket can be ordered to ease the lifting of the
pump. See the service instruction on
www.grundfos.com.
Prior to installation, make sure that the pit
bottom is even.
WARNING
Electric shock
Death or serious personal injury
- It must be possible to switch off the
power supply and lock the main switch
in position 0 with a padlock to ensure
that the power supply cannot be
accidentally switched on.
- Any external voltage connection to the
pump must be switched off before
working on the pump.
The pump must not run dry. Dry running
can cause ignition hazard.
Install an independent secondary level
switch to ensure that the pump is stopped
in case the primary stop level switch is not
working.
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.
Use the lifting bracket only for lifting the
pump.
Do not use it to hold the pump when it is in
operation.
We recommend that you always use
Grundfos accessories to avoid
malfunctions due to incorrect installation.
WARNING
Crushing hazard
Death or serious personal injury
- Check that the screws of the lifting
bracket are tightened before attempting
to lift the pump. Tighten, if necessary.
- Always lift the pump by its lifting bracket
or by means of a fork-lift truck if the
pump is fixed on a pallet.
- Never lift the pump by the power cable
or the hose or the pipe.
WARNING
Electric shock
Death or serious personal injury
- Never lift the pump by the power cable.

English (GB)
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3.1.2 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 pit.
See fig. 1.
Fig. 1 Submerged pump on auto coupling
Proceed as follows:
1. Drill mounting holes for the guide rail bracket on
the inside of the pit and fasten the guide rail
bracket provisionally with two screws.
2. Place the auto-coupling base unit on the bottom
of the pit. Use a plumb line to establish the
correct positioning. Fasten the auto coupling with
expansion bolts. If the bottom of the pit is
uneven, the auto-coupling base unit must be
supported so that it is level when being fastened.
3. Assemble the outlet pipe in accordance with 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 pit.
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 pit.
6. Clean out debris from the pit before lowering the
pump into the pit.
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 pit by
means of a chain secured to the lifting bracket of
the pump. When the pump reaches the auto-
coupling base unit, the pump will automatically
connect tightly.
9. Hang up the end of the chain on a suitable hook
at the top of the pit and in such a way 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 pit.
Make sure that the cable is not sharply bent or
pinched.
11. Connect the power cable.
Before beginning installation procedures,
make sure that the atmosphere in the pit is
not potentially explosive.
Make sure that the pipes are installed
without the use of undue force. Do not
allow loads from the weight of the pipes to
be carried by the pump. We recommend
that you 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; never use these elements as a
means to align the pipes.
TM02 8404 0616
The guide rails must not have any axial
play as this would cause noise during
pump operation.
The free end of the power cable must not
be submerged, as water may penetrate
through the cable into the motor.

English (GB)
6
3.1.3 Free-standing submerged installation on
ring stand
Pumps for free-standing submerged installation can
stand freely on the bottom of the pit. The pump must
be installed on a ring stand. See fig. 2.
The ring stand is available as an accessory.
In order to facilitate service on the pump, fit a flexible
union or coupling to the elbow on the outlet for easy
separation.
If a hose is used, make sure that the hose does not
buckle and that the inside diameter of the hose
matches that of the pump outlet port.
If a rigid pipe is used, fit the union or coupling, non-
return valve and isolating valve in the order
mentioned, when viewed from the pump.
If the pump is installed in muddy conditions or on
uneven ground, support the pump on bricks or a
similar support.
Fig. 2 Free-standing submerged pump on ring
stand
Proceed as follows:
1. Fit a 90 ° elbow to the pump outlet and connect
the outlet pipe or hose.
2. Lower the pump into the liquid by means of a
chain secured to the lifting bracket of the pump.
We recommend that you place the pump on a
plane, solid foundation. Make sure that the pump
is hanging from the chain and not the power
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 pit and in such a way that 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 pit.
Make sure that the cable is not sharply bent or
pinched.
5. Connect the power cable.
TM02 8405 0616
The free end of the power cable must not
be submerged, as water may penetrate
through the cable into the motor.

English (GB)
7
3.1.4 Dry installation
In dry installations, the pump must be installed
permanently outside the pit.
The motor is totally enclosed and watertight.
Consequently, it will not be damaged in case the
installation site is flooded.
Precautions
• As the pump is installed outside the pit, make
sure that the liquid level in the pit is high enough
to ensure sufficient NPSH.
• Size the inlet line according to the length and the
desired pump performance. A possible difference
in level between the pit and the pump inlet must
also be taken into account.
• Support the pipes so that no strain or other
mechanical influences are transmitted to the
pump. We recommend that you install expansion
joints and pipe hangers. See fig. 3.
Fig. 3 Horizontal dry installation with brackets
• If a reducer is fitted between the inlet line and the
pump, it must be of the eccentric type. The
reducer must be fitted so that the straight edge is
upwards to avoid air pockets in the inlet line. Air
in the inlet line may cause cavitation. See fig. 3.
• Install the pump on a separate foundation, for
instance a concrete foundation. The weight of the
foundation must be approx. 1.5 times the weight
of the pump. To prevent vibrations from being
transmitted to the building and pipes, we
recommend that you place the pump on vibration
absorbing material.
Fig. 4 Vertical dry installation on a base stand
Fig. 5 Horizontal dry installation with brackets
TM02 8399 5103
Pos. Description
1 Expansion joint
2 Non-return valve
3 Isolating valve
4 Pipe hanger
4
3
2
1
TM02 8401 0616
TM02 8402 0616

English (GB)
8
Proceed as follows:
1. Fit the base stand or brackets to the pump. See
dimensional sketches at the end of this booklet.
2. Mark and drill fixing holes in the concrete floor or
foundation.
3. Fasten the pump with expansion bolts.
4. Check that the pump stands vertically or
horizontally. Use a spirit level
5. Connect the power cable.
6. Install the inlet and outlet lines as well as the
valves, if any. Make sure that the pump is not
stressed by the pipes.
Tightening torques for inlet and outlet flanges
Grade 4.6 (5) galvanised steel screws and nuts.
Grade A2.50 (AISI 304) steel screws and nuts.
3.2 Electrical connection
Set the motor-protective circuit breaker to the rated
current of the pump. The rated current is stated on
the pump nameplate.
We recommend that you fit an isolating
valve on the inlet side of the pump and a
non-return valve as well as an isolating
valve on the outlet side.
DN DC Screw
Torque [Nm +/- 5]
Slightly
oiled
Well
lubricated
DN 65 145 4 x M16 70 60
DN 80 160 8 x M16 70 60
DN 100 180 8 x M16 70 60
DN 150 240 8 x M20 140 120
DN DC Screw
Torque [Nm +/- 5]
Slightly
oiled
Well
lubricated
DN 65 145 4 x M16 - 60
DN 80 160 8 x M16 - 60
DN 100 180 8 x M16 - 60
DN 150 240 8 x M20 - 120
The gasket must be a full face, reinforced
paper gasket like Klingersil C4300. If softer
gasket material is used, torques must be
reconsidered.
WARNING
Electric shock
Death or serious personal injury
- Before starting any work on the product,
make sure that the fuses have been
removed or the main switch has been
switched off and locked in position 0.
Make sure that the power supply cannot
be accidentally switched on.
WARNING
Electric shock
Death or serious personal injury
- Make sure the earth and phase
conductors are not mixed up, follow the
description in the wiring diagram.
- Make sure the earth conductor is
connected first.
Connect the pump to an external main
switch which ensures all-pole
disconnection with a contact separation
according to EN 60204-1.
Make sure that the main switch is locked in
position 0. Type and requirements as
specified in EN 60204-1.
The electrical connection must be carried
out in accordance with local regulations.
Connect the pump to a control box with a
motor protection relay with IEC trip class
10 or 15.
Connect pumps installed in hazardous
locations to a control box with a motor
protection relay with IEC trip class 10.

English (GB)
9
The supply voltage and frequency are marked on the
pump nameplate. The voltage tolerance must be
within - 10 %/+ 6 % 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 power cable and a
free cable end, except for pumps for Australia which
have 15 m cable.
Pumps without sensor must be connected to one of
these two controller types:
• a control box with motor-protective circuit
breaker, such as a Grundfos CU 100 control box
• a Grundfos LC, LCD 107, LC, LCD 108, LC, LCD
110 or DC, DCD pump controller.
Pumps with sensor must be connected to a
Grundfos IO 113 and one of these two controller
types:
• a control box with motor-protective circuit
breaker, such as a Grundfos CU 100 control box
• a Grundfos LC, LCD 107, LC, LCD 108, LC, LCD
110 or DC, DCD pump controller.
Pumps with WIO sensor
Every explosion-proof pump is assembled with a
WIO sensor.
For safe installation and operation of pumps
equipped with a WIO sensor, we recommend that
you install an RC filter between the power supply
and the pump.
Please note that the following aspects 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 cables are running in
parallel close to each other, the risk of
transients causing interference between power
and signal cables will increase with the length
of the cables.
• Switchboard layout:
– Power and signal cables 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 will 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. But be aware that soft starters and
variable-speed drives have other EMC-related
issues that must be taken into consideration. For
more information, see section 8. Servicing the
product.
For further information see the installation and
operating instructions for the selected control box or
pump controller.
Observe the following points:
• Do not install Grundfos control boxes,
pump controllers, Ex barriers, or leave
the free end of the power cable, in
potentially explosive environments.
• The classification of the installation site
must be defined by the owner of the
site in each individual case.
• 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, e.g.
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
has been connected correctly.
• Float switches used in potentially
explosive environments must be
approved for this application. They
must be connected to the Grundfos LC,
LCD 108 or DC, DCD pump controller
via the intrinsically safe LC-Ex4 barrier
to ensure a safe circuit.
Set the motor-protective circuit breaker to
the rated current of the pump. The rated
current is stated on the pump nameplate.
A damaged power cable must be replaced
by the manufacturer, its service agent or
similarly qualified persons.
Before installation and the first startup of
the pump, check the condition of the power
cable visually to avoid short circuits.
If an RC filter is installed to avoid any kind
of transients in the installation, install the
RC filter between the power supply and
the pump.

English (GB)
10
3.2.1 Wiring diagrams
7-core cable
Figure 6shows the wiring diagrams for SE1, SEV
pumps with 7-core cable in three versions, one
without sensors and two with WIO sensor and
moisture switch.
* Pumps from 4 kW and up sold in Australia or New Zealand are fitted with a PTC thermistor.
Fig. 6 Wiring diagram, 7-core cable, DOL
TM04 6884 0710
Yellow and green
(Not used)
Standard version with
thermal switches
Sensor version with thermal switch,
Pt1000, moisture switch and water-in-oil
sensor
Sensor version with thermal
switch, PTC thermistor *, moisture
switch and water-in-oil sensor

English (GB)
11
10-core cable
Figures 7, 8and 9show the wiring diagrams for SE1,
SEV pumps with 10-core cable in three versions, one
without sensors and two with WIO sensor and
moisture switch.
* Pumps from 4 kW and up sold in Australia or New Zealand are fitted with a PTC thermistor.
Fig. 7 Wiring diagram, 10-core cable, star/delta (Y/D)
TM04 6885 0710
Standard version with
thermal switches
Sensor version with thermal switch,
PTC thermistor *, moisture switch
and water-in-oil sensor
Yellow and green
(Not used)
Sensor version with thermal switch,
Pt1000, moisture switch and water-
in-oil sensor

English (GB)
12
* Pumps from 4 kW and up sold in Australia or New Zealand are fitted with a PTC thermistor.
Fig. 8 Wiring diagram, 10-core cable, star-connected (Y)
* Pumps from 4 kW and up sold in Australia or New Zealand are fitted with a PTC thermistor.
Fig. 9 Wiring diagram, 10-core cable, delta-connected (D)
TM04 6886 0710
Standard version with
thermal switches
Sensor version with thermal switch,
Pt1000, moisture switch and water-
in-oil sensor
Sensor version with thermal switch,
PTC thermistor *, moisture switch
and water-in-oil sensor
Yellow and green
(Not used)
TM04 6887 0710
Standard version with
thermal switches
Sensor version with thermal switch,
Pt1000, moisture switch and water-
in-oil sensor
Sensor version with thermal switch,
PTC thermistor *, moisture switch and
water-in-oil sensor
Yellow and green
(Not used)

English (GB)
13
3.2.2 Frequency converter operation
All SE1, SEV pump types are designed for frequency
converter operation to keep the energy consumption
at a minimum.
For frequency converter operation, please observe
the following information:
Requirements must be fulfilled.
Recommendations ought to be fulfilled.
Consequences ought to be considered.
Requirements
• The thermal protection of the motor must be
connected.
• Minimum switching frequency: 2.5 kHz.
• Peak voltage and dU/dt must be in accordance
with the table below. The values stated are
maximum values supplied to the motor terminals.
The cable influence has not been taken into
account. See the frequency converter data sheet
regarding the actual values and the cable
influence on the peak voltage and dU/dt.
• If the pump is an Ex-approved pump, check if the
Ex certificate of the specific pump allows the use
of a frequency converter.
• Set the frequency converter U/f ratio according to
the motor data.
• Local regulations or standards must be fulfilled.
Recommendations
Before installing a frequency converter, calculate the
lowest allowable frequency in the installation in order
to avoid zero flow.
• Do not reduce the motor speed below 30 % of
rated speed.
• Keep the flow velocity above 1 m/sec.
• Let the pump run at rated speed at least once a
day in order to prevent sedimentation in the
piping system.
• Do not exceed the frequency indicated on the
nameplate. In this case there is risk of motor
overload.
• Keep the power cable as short as possible. The
peak voltage will increase with the length of the
power cable. See data sheet for the frequency
converter used.
• Use input and output filters on the frequency
converter. See data sheet for the frequency
converter used.
• Use a screened power cable if there is a risk that
electrical noise can disturb other electrical
equipment. See data sheet for the frequency
converter used.
Consequences
When operating the pump via a frequency converter,
please be aware of these possible consequences:
• The locked-rotor torque will be lower. How much
lower will depend on the frequency converter
type. See the installation and operating
instructions for the frequency converter used for
information on the locked-rotor torque available.
• The working condition of bearings and shaft seal
may be affected. The possible effect will depend
on the application. The actual effect cannot be
predicted.
• The acoustic noise level may increase. See the
installation and operating instructions for the
frequency converter used for advice as to how to
reduce the acoustic noise.
4. Starting up the product
SE1 and SEV pumps are suitable for the following
operating situations:
• Dry installation without separate motor cooling.
• Submerged installation
– S1 operation (continuous operation).
The pump can operate continuously without
having to be stopped for cooling.
– S3 operation (intermittent operation).
S3 operation is a series of identical duty cycles
(TC) each with a constant load for a period,
followed by a rest period. Thermal equilibrium
is not reached during the cycle.
Maximum repetitive peak
voltage
[V]
Maximum dU/dt UN
400 V
[V/μsec.]
850 2000
The pump must not run dry.
Dry running can cause ignition hazard.
Do not open the clamp while the pump is
operating.
Do not start the pump if the atmosphere in
the pit is potentially explosive.
The pumps are fitted with impellers of S-
tube®design. S-tube®impellers are wet
balanced which will reduce the vibration
during operation. If the pumps are started
with the pump housing full of air, the
vibration level will be higher compared to
normal operation.
Local balancing of S-tube®impellers will
damage the wet balancing and lead to
higher vibration levels during operation.
The pumps are designed for continuous
operation, both for submerged and dry
installation.

English (GB)
14
4.1 Checking the direction of rotation
An arrow on the top cover indicates the correct
direction of rotation. Correct direction of rotation is
clockwise when viewed from above.
When started, the pump will jerk in the opposite
direction of the direction of rotation. See fig. 10.
Procedure
The direction of rotation must be checked in the
following way every time the pump is connected to a
new installation.
Proceed as follows:
1. Let the pump hang from a lifting device, for
example the hoist used for lowering the pump
into the pit.
2. Start and stop the pump while observing the
movement or jerk of the pump. If connected
correctly, the pump will rotate clockwise, and it
will jerk counterclockwise. See fig. 10.
3. If the direction of rotation is wrong, interchange
any two of the phases in the power cable. See
figs 6to 9.
Fig. 10 Jerk direction
4.2 Startup
4.2.1 SE1 pumps
1. Remove the fuses and check that the impeller
can rotate freely. Turn the impeller by hand.
2. Check the condition of the oil in the oil chamber.
See also section 8.2 Checking and changing the
oil.
3. Check that the system, bolts, gaskets, pipes and
valves etc. are in correct condition.
4. Check the direction of rotation. See section
4.1 Checking the direction of rotation.
5. Mount the pump in the system.
6. Switch on the power supply.
7. Check whether the monitoring units, if used, are
operating satisfactorily.
8. For pumps with sensor, switch on IO 113 and
check that there are no alarms or warnings. See
section 8. Servicing the product.
9. Check the setting of the air bells, float switches
or electrodes.
10. Open the isolating valves, if fitted.
11. Check that the liquid level is above the upper
edge of the clamp on the pump. If the level is
below the clamp, add liquid to the pit until the
minimum level is obtained.
12. Remove trapped air from the pump housing by
tilting the pump by means of the lifting chain.
13. Start the pump and let the pump run briefly, and
check if the liquid level is falling. A correctly
vented pump will quickly lower the liquid level.
After one week of operation or after replacement of
the shaft seal, check the condition of the oil in the
chamber. For pumps without sensor, this is done by
taking a sample of the oil. See section 8. Servicing
the product for procedure.
Only start and run an unsubmerged pump
for a few seconds to check the direction of
rotation.
TM06 6007 0216
CAUTION
Sharp element
Minor or moderate personal injury
- Wear protective gloves to avoid being
cut by the sharp edges of the impeller.
If the pump has not been in operation for
some time, vent it to let any explosive
gasses gathered in the pump escape. See
step 12 below.
In case of abnormal noise or vibrations
from the pump, other pump failure, power
supply failure or water supply failure, stop
the pump immediately. Do not attempt to
restart the pump until the cause of the fault
has been found and the fault corrected.

English (GB)
15
4.2.2 SEV pumps
1. Remove the pump from the system.
2. Check that the impeller can rotate freely. Turn the
impeller by hand.
3. Check the condition of the oil in the oil chamber.
See also section 8.2 Checking and changing the
oil.
4. Check whether the monitoring units, if used, are
operating satisfactorily.
5. Check the setting of the air bells, float switches
or electrodes.
6. Check the direction of rotation. See section
4.1 Checking the direction of rotation.
7. Submerged pumps:
– Start the pump above water level and lower the
pump into the pit to avoid air being trapped in
the pump housing.
8. Dry-installed pumps with positive inlet
pressure (the pump is installed in a pump room
next to the pit):
– Open the isolating valve on the inlet side.
– Loosen the vent screw until water comes out of
the vent hole; then tighten the vent screw
again.
– Open the isolating valve on the outlet side and
start the pump.
9. Dry-installed pumps with inlet pipe and foot
valve:
– Open the isolating valve on the outlet side to let
the water above the valve run backwards to
prime the inlet pipe.
– Loosen the vent screw until water comes out of
the vent hole; then tighten the vent screw
again.
– Start the pump.
10. Dry-installed pumps with inlet pipe and foot
valve, without or with short outlet pipe (we
recommend that you use a vacuum system):
– Keep the isolating valve on the outlet side
closed.
– Start the vacuum system until liquid has been
sucked in and the pump has been vented.
– Open the isolating valve on the outlet side and
start the pump.
Fig. 11 Position of the air vent screw
5. Handling and storing the product
5.1 Handling
See section 3.1.1 Lifting the pump.
5.2 Storing the product
During long periods of storage, the pump must be
protected against moisture, heat and cold.
We recommend that you leave the polyurethane-
embedded plug mounted in the pump to prevent
moisture from penetrating into the motor.
If the pump has been in use, the oil needs to be
changed before storage. See section 8.2 Checking
and changing the oil.
After a long period of storage, the pump must be
inspected before it is put into operation. Make sure
that the impeller can rotate freely. Pay special
attention to the condition of the shaft seal, O-rings,
oil and the cable entry.
Check that there is positive inlet pressure
before starting up the pump.
TM04 4139 0809
If the product is stored for more than one
year or if it will be a long time until it is put
into operation after the installation, turn the
impeller by hand at least once a month.
Air vent screw

English (GB)
16
6. Product introduction
6.1 Product description
Fig. 12 SE pump
6.2 Applications
The SE1 and SEV pumps are designed for handling
wastewater, process water and unscreened raw
sewage in heavy-duty municipal, utility and industrial
applications.
The pumps are available with the efficient S-tube®or
SuperVortex impellers allowing for free passage of
solids up to 100 mm.
The pumps can be used in permanent, dry
installations or in submerged installations on auto-
coupling systems. The pumps are also suitable for
free-standing installations or as portable pumps.
6.3 Pumped liquids
The standard cast iron versions are designed for
pumping these liquids:
• large quantities of drainage, surface and storm
water
• domestic wastewater with discharge from toilets
• wastewater with a high content of fibres
(SuperVortex impeller)
• industrial process water
• wastewater with gaseous sludge
• municipal and commercial sewage and
wastewater.
Stainless steel versions
The stainless steel versions are suitable for pumping
the following liquids:
• industrial process water containing chemicals
• aggressive or corrosive drain water and effluent
• wastewater with abrasive particles
• wastewater contaminated with seawater.
6.4 Potentially explosive environments
Use explosion-proof pumps for applications in
potentially explosive environments. See section
6.7 Approvals.
TM06 5987 0216
Pos. Description
1 Lifting bracket
2Nameplate
3 Sleeve
4Oilscrew
5 Outlet flange
6 Outlet opening
7 Cable plug
8 Top cover
9 Clamp
10 Pump housing
5
6
1
2
3
4
7
9
10
8
SE1 and SEV pumps must under no
circumstances pump combustible liquids.
The classification of the installation site
must be defined by the owner of the site in
each individual case.

English (GB)
17
6.5 Identification
6.5.1 Nameplate
The nameplate states the operating data and
approvals applying to the pump. The nameplate is
fitted to the top cover of the pump.
Fig. 13 Nameplate
Special conditions for safe use of
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 level switches connected
to the motor control circuit. The
minimum level depends on the
installation type and is specified in
these 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 pumps have an ambient
temperature range of -20 to +40 °C and
a maximum process temperature of
+40 °C. The minimum ambient
temperature for a pump with a water-
in-oil sensor is 0 °C.
7. The thermal protector in the stator
windings has a rated 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 the 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. For painted pumps, minimise the risk of
electrostatic discharge in the following
ways:
– Earthing is mandatory.
– In dry installations, keep a safety
distance between pumps and
walking paths.
– Use wet cloths for cleaning.
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.
TM02 8398 2417
Pos. Description
1Notified body and explosion protection
classification
2 Explosion protection mark
3 Type designation
4 Product number and serial number
5 Maximum head [m]
6 Enclosure class to IEC 60529
7 Maximum installation depth [m]
8 Number of phases
9 Frequency [Hz]
10 Speed [min-1]
11 Motor input power P1 [kW]
12 Motor output power P2 [kW]
13 Country of production
14 Explosion protection certificate number
15 Standard for wastewater lifting stations for
buildings and installation sites
16 Maximum flow rate [m3/h]
17 Production code (year/week)
18 Maximum liquid temperature [°C]
19 Insulation class
20 Power factor
21 Rated current 1
22 Rated voltage 1
23 Rated current 2
24 Rated voltage 2
25 Weight without cable [kg]
12 1311 19 6
2
1
3
4
5
7
8
9
10
18
17
16
15
20
21
22
23
24
25
14
Tmax: °C
Type: P.c.
Hmax: Qmax:m
VA
A
mh
/
3
V
Model:
m Insul.class: &RVij
Motor: Hz
0197
~
n: min-1
kgWeight:IP68P1/P2：/ kW
Made in Tatabánya
Hungary DK-8850 Bjerringbro, Denmark
DOP 98948763 98807641

English (GB)
18
6.5.2 Type key
Example: SE1.80.80.40.A.Ex.4.51D.B
1 Maximum frequency in case of frequency-
converter operation.
2 The generation code distinguishes between
pumps of different design, but with the same
power rating.
6.6 Installation types
SE1 and SEV pumps are designed for two
installation types:
• submerged installation:
– vertically on an auto coupling
– vertically, free-standing on a ring stand.
• dry installation:
– vertically on a base stand
– horizontally with brackets secured to a
concrete floor or foundation. For WIO-sensor
versions the outlet pipe must be directed
upwards to ensure proper operation of the
WIO sensor.
Code Explanation Designation
SE Grundfos sewage and
wastewater pumps Pump type
1 S-tube®impeller Impeller type
V SuperVortex impeller
80 Maximum solids size [mm] Pump
passage
80 Nominal diameter of pump
outlet port [mm] Pump outlet
40 Output power P2/10 Power [kW]
[ ] Standard (without sensor) Sensor
version
A Sensor version
[ ] Non-explosion-proof
pump (standard) Pump version
Ex Explosion-proof pump
2 2-pole Number of
poles
4 4-pole
50 50 Hz Frequency
[Hz] 1
0B 400-415 V, DOL
Voltage and
starting
method
0D 380-415 V, DOL
1D 380-415 V, Y/D
0E 220-240 V, DOL
1E 220-240 V, Y/D
[ ] First generation Generation 2
B Second generation
[ ] Cast iron impeller, pump
housing and top cover
Pump
materials
Q
Stainless steel impeller,
cast iron pump housing
and top cover
REntire pump of stainless
steel
S
Stainless steel pump
housing, impeller and
intermediate flange and
cast iron top cover (on
request)
D Stainless steel
Z Custom-built products Customisation
All the EX pumps are equipped with a WIO
sensor.
In case of dry, horizontal installation, the
outlet pipe must be directed upwards to
ensure the proper operation of the WIO
sensor.

English (GB)
19
6.7 Approvals
The standard versions of SE1 and SEV pumps have
been tested by VDE, and the explosion-proof
versions approved by DEKRA according to the ATEX
directive.
6.7.1 Approval standards
The standard variants are approved by LGA (notified
body under the Construction Products Directive)
according to EN 12050-1 or EN 12050-2 as specified
on the pump nameplate.
6.7.2 Explanation of the Ex approval
The SE1 and SEV pumps have the following
explosion protection classifications:
• CE 0344 II2 GD Ex db eb h mb IIB T4, T3 Gb:
Ex h mb tb IIICT135 °C, T200 °C Db.
* For motors supplied via a frequency converter,
the maximum surface temperature T3 is 200 °C.
Directive or
standard Code Description
ATEX
CE 0344 =
CE marking of conformity according to the ATEX directive 2014/34/EU. 0344
is the number of the notified body which has certified the quality system for
ATEX.
= Marking of explosion protection.
II = Equipment group according to the ATEX directive, defining the requirements
applicable to the equipment in this group
2=
Equipment category according to the ATEX directive, defining the
requirements applicable to the equipment in this category
G = Explosive atmosphere caused by gases, vapours or mists
D = Explosive atmosphere caused by dust
Harmonised
European
standard
Ex = The equipment conforms to harmonised European standard.
h=
Constructional safety (c) and Liquid immersion (k) according to EN 80079-36
and 80079-37
db = Flameproof enclosure according to EN 60079-1
eb = Protection according to EN 60079-7
mb = Encapsulation according to EN 60079-18
IIB = Classification of gases, see EN 60079-0. Gas group B includes gas group A.
T4/T3 =
Maximum surface temperature is 135 °C (T4) in direct-drive pumps and
200 °C (T3) in pumps driven by frequency converter, according to EN 60079-
0*
Gb = Suitable for use in explosive gas atmospheres in zone 1 and zone 2
tb = Protection by enclosure EN 60079-31
IIIC = Conductive dust
T135 °C
/ T200
°C
= Maximum surface temperature
Db = Suitable for use in explosive dust atmospheres in zone 1 and zone 2

English (GB)
20
6.7.3 Australia
Explosion-proof variants for Australia are approved
as Ex nA II T3 according to IEC 60079-15
(corresponding to AS 2380.9).
Standard Code Description
IEC 60079-
15:1987
Ex = Area classification according to AS 2430.1
nA = Non-sparking according to AS 2380.9:1991, section 3 (IEC 79-15:1987)
II = Suitable for use in explosive atmospheres (not mines)
T3 = Maximum surface temperature is 200 °C
X
The letter X in the certificate number indicates that the equipment is subject
to special conditions for safe use. The conditions are mentioned in the
certificate and the installation and operating instructions.