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)
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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)
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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)
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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)
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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.

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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