Grundfos SE1 50 Installation instructions

SE1 50, 80, 100 - SEV 65, 80, 100
Safety instructions
Safety instructions and other important information
GRUNDFOS INSTRUCTIONS

SE1 50, 80, 100 - SEV 65, 80, 100
English (GB)
Safety instructions................................................5
Български (BG)
Инструкции за безопасност .......................................33
Čeština (CZ)
Bezpečnostní pokyny ............................................68
Deutsch (DE)
Sicherheitshinweise .............................................97
Dansk (DK)
Sikkerhedsanvisninger...........................................132
Eesti (EE)
Ohutusjuhised ................................................160
Español (ES)
Instrucciones de seguridad........................................189
Suomi (FI)
Turvallisuusohjeet ..............................................223
Français (FR)
Consignes de sécurité ...........................................251
Ελληνικά (GR)
Οδηγίες ασφαλείας .............................................283
Hrvatski (HR)
Sigurnosne upute ..............................................318
Magyar (HU)
Biztonsági utasítások ...........................................346
Italiano (IT)
Istruzioni di sicurezza ...........................................377
Lietuviškai (LT)
Saugos nurodymai .............................................410
Latviešu (LV)
Drošības instrukcijas ............................................438
Nederlands (NL)
Veiligheidsinstructies ............................................468
Polski (PL)
Zasady bezpieczeństwa..........................................500
3
Table of contents

Português (PT)
Instruções de segurança .........................................532
Română (RO)
Instrucţiuni de siguranţă..........................................564
Srpski (RS)
Sigurnosna uputstva ............................................594
Русский (RU)
Указания по технике безопасности .................................622
Svenska (SE)
Säkerhetsinstruktioner...........................................658
Slovensko (SI)
Varnostna navodila .............................................687
Slovenčina (SK)
Bezpečnostné pokyny ...........................................716
Türkçe (TR)
  .............................................745
Українська (UA)
Інструкція з техніки безпеки ......................................774
中文 (CN)
安全指导 ....................................................810
Norsk (NO)
Sikkerhetsinstruksjoner ..........................................833
(AR) 
  ...................................................861
繁體中文 (TW)
安全指示 ....................................................885
Tiếng Việt (VI)
Hướng dẫn an toàn.............................................908
Declaration of conformity .......................................937
Declaration of conformity .......................................940
Declaration of performance ......................................942
Operating manual EAC .........................................958
4SE1 50, 80, 100 - SEV 65, 80, 100
Table of contents

English (GB) Safety instructions
■Original safety instructions
These safety instructions give a quick overview of the
safety precautions to be taken in connection with any
work on this product.
Observe these safety instructions during handling,
installation, operation, maintenance, service and
repair of this product.
These safety instructions are a supplementary
document, and all safety instructions will appear
again in the relevant sections of the installation and
operating instructions.
Keep these safety instructions at the installation site
for future reference.
General information
This appliance can be
used by children aged
from 8 years and above
and persons with re-
duced 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 under-
stand the hazards in-
volved.
Children shall not play
with the appliance.
Cleaning and user main-
tenance shall not be
made by children without
supervision.
Read this document be-
fore you install the prod-
uct. Installation and op-
eration must comply with
local regulations and ac-
cepted codes of good
practice.
Product description
5
6
1
2
3
4
7
9
10
8
TM065987
SE pump
Pos. Description
1 Lifting bracket
2 Nameplate
3 Sleeve
4 Oil screw
5 Outlet flange
6 Outlet opening
7 Cable plug
8 Top cover
9 Clamp
10 Pump housing
5
English (GB)

Intended use
The SE1 and SEV pumps are designed for
transferring wastewater, process water and
unscreened raw sewage in heavy-duty municipal,
utility and industrial applications.
The pumps are available with S-tube® or SuperVortex
impellers allowing the free passage of solids up to
100 mm.
The pumps can be used in permanent, dry- or
submerged installations on auto-coupling systems.
The pumps are also suitable for free-standing
installations or as portable pumps.
Pumped liquids
The standard cast iron versions are designed for
pumping the following 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 containing abrasives
• seawater contaminated with wastewater.
Nameplate
Fix the extra nameplate supplied with the pump at the
installation site or keep it in the cover of this booklet.
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
m h
/
3
V
Model:
mInsul.class: Cosφ :
Motor: Hz
0197
~
n: min-1
kgWeight: IP68P1/P2： / kW
U.K Importer: Grundfos Pumps ltd
Grovebury Road Leighton Buzzard
Bedfordshire LU74TL DK-8850 Bjerringbro, Denmark
98948763 99657185Made in Tatabánya Hungary
For Converter Operation,
see manual
TM028398
Nameplate
Pos. Description
1Notified body and explosion protection
classification
2 Explosion protection mark
3 Type designation
4 Product number
5 Maximum head [m]
6 Enclosure class
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 [A], delta connection
22 Rated voltage [V], delta connection
23 Rated current [A], star connection
24 Rated voltage [V], star connection
25 Net weight [kg]
Type key
Example: SE1.80.80.40.A.Ex.4.51D.B
Code Explanation Designation
SE Sewage and wastewater
pump Pump type
1S-tube® impeller Impeller type
V SuperVortex impeller
80 Maximum solids size [mm] Pump passage
80 Nominal diameter [mm] Pump outlet
40 Output power P2/10 Power [kW]
6
English (GB)

Code Explanation Designation
[ ] 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 Generation2
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 hous-
ing, impeller and intermedi-
ate flange and cast iron top
cover (on request)
D Stainless steel
Z Custom-built products Customisation
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.
Approvals
SE1 and SEV pumps have been tested by Dekra /
KEMA. The explosion-proof version hold two
examination certificates:
• ATEX(EU): KEMA 04ATEX2201X
• IECEx: IECEx DEK 21.0017X.
Both certificates have been issued by Dekra. The
standard versions of SE1 and SEV pumps are tested
by VDE.
Approval standards
The standard variants are approved by TÜV
Rheinland (LGA) notified body under the Construction
Products Directive according to EN 12050-1 or EN
12050-2 as specified on the nameplate.
Explanation of the Ex approval
The SE1 and SEV pumps have the following
explosion protection classifications:
• CE 0344 II 2 GD Ex db eb h mb IIB T4, T3 Gb;
Ex h mb tb IIIC T135 °C, T200 °C Db.
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.
= The equipment conforms to harmonised European standard.
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
7
English (GB)

Directive or
standard Code Description
Harmonised
European
standard
Ex = Marking of explosion protection
h = Constructional 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 = 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 operated 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
*For motors connected to a frequency converter, the
maximum surface temperature T3 is 200 °C.
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
XThe letter X in the certificate number indicates that the
equipment is subject to special conditions for safe use.
8
English (GB)

Potentially explosive environments
Use explosion-proof pumps for applications in
potentially explosive environments.
SE1 and SEV pumps
must under no circum-
stances pump combusti-
ble liquids.
The classification of the
installation site must be
defined by the owner.
Special conditions for
safe use of explosion-
proof pumps:
1. Make sure the mois-
ture switch and ther-
mal switches are
connected in the
same circuit, but
have separate alarm
outputs (motor stop)
in case of high hu-
midity or high tem-
perature in the mo-
tor.
2. Bolts used for re-
placement must be
class A2-70 or better
according to EN/ISO
3506-1.
3. Contact the manu-
facturer for informa-
tion on the dimen-
sions of the
flameproof joints.
4. The level of the pum-
ped 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 oper-
ating instructions.
5. Make sure the per-
manently attached
cable is suitably me-
chanically protected
and terminated in a
suitable terminal
board placed outside
the potentially explo-
sive area.
6. The pumps have an
ambient temperature
range of -20 to +40
°C and a maximum
process temperature
9
English (GB)

of +40 °C. The mini-
mum ambient tem-
perature for a pump
with a water-in-oil
(WIO) sensor is 0 °C.
7. The thermal protec-
tor in the stator wind-
ings has a rated
switch temperature
of 150 °C and must
guarantee the dis-
connection of the
power supply. The
power supply must
be reset manually.
8. The control unit must
protect the WIO sen-
sor against short cir-
cuit current. The
maximum current
from the control unit
must be limited to
350 mA.
9. For painted pumps,
minimise the risk of
electrostatic dis-
charge by:
• Earthing (mandato-
ry).
• In dry installations,
keep a safety dis-
tance between
pumps and walking
paths.
• Use wet cloths for
cleaning.
10. The WIO sensor
must be used only
with a galvanically
isolated circuit.
11. The lock nut of the
cable connector
must only be re-
placed with an identi-
cal one.
Transporting the product
The pump may be transported and stored in a vertical
or horizontal position.
CAUTION
Crushing hazard
Minor or moderate per-
sonal injury
‐Make sure the pump
cannot roll or fall
over.
10
English (GB)

CAUTION
Crushing hazard
Minor or moderate per-
sonal injury
‐Make sure the pump
cannot roll or fall
over.
Handling the product
All lifting equipment must be rated for the purpose
and checked for damage before lifting the pump. The
lifting equipment rating must not be exceeded. The
pump weight is stated on the nameplate.
WARNING
Crushing hazard
Death or serious person-
al injury
‐Do not stack pump
packages or pallets
on the top of each
other when lifting or
moving them.
‐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.
CAUTION
Sharp element
Minor or moderate per-
sonal injury
‐Wear protective
gloves when opening
the pump package.
Keep the cable end pro-
tectors in storage for lat-
er use.
WARNING
Crushing hazard
Death or serious person-
al injury
‐Do not stack pump
packages or pallets
on the top of each
other when lifting or
moving them.
‐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.
CAUTION
Sharp element
Minor or moderate per-
sonal injury
‐Wear protective
gloves when opening
the pump package.
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 not be exceeded.
11
English (GB)

WARNING
Crushing hazard
Death or serious person-
al injury
‐When lifting the
pump, make sure
your hand cannot get
caught between the
lifting bracket and
the hook.
WARNING
Crushing hazard
Death or serious person-
al injury
‐Make sure that the
hook is fixed properly
to the lifting bracket.
‐Make sure that the
lifting bracket is tight-
ened before lifting
the pump.
WARNING
Crushing hazard
Death or serious person-
al injury
‐Do not stand near or
under the pump
when it is lifted.
When lifting the pump,
use the right lifting point
to keep the pump bal-
anced.
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.
WARNING
Crushing hazard
Death or serious person-
al injury
‐When lifting the
pump, make sure
your hand cannot get
caught between the
lifting bracket and
the hook.
WARNING
Crushing hazard
Death or serious person-
al injury
‐Make sure that the
hook is fixed properly
to the lifting bracket.
‐Make sure that the
lifting bracket is tight-
ened before lifting
the pump.
WARNING
Crushing hazard
Death or serious person-
al injury
‐Do not stand near or
under the pump
when it is lifted.
Installation requirements
All safety regulations must be observed at the
installation site.
12
English (GB)

Prior to installation, check the oil level in the oil
chamber.
Compliance with the
standard EN 60079-14 is
a customer responsibili-
ty.
The pump must be in-
stalled vertically in both
auto-coupling or free-
standing submerged in-
stallation.
Pump installation in pits
must be carried out by
specially trained per-
sons.
Work in or near pits must
be carried out according
to local regulations.
Persons must not work
on the installation area
when the environment is
explosive.
DANGER
Electric shock
Death or serious person-
al injury
‐It must be possible to
lock the main switch
in position 0. Type
and requirements as
specified in EN
60204-1.
DANGER
Electric shock
Death or serious person-
al injury
‐Make sure there are
at least 3 m free ca-
ble above the maxi-
mum liquid level.
For safety reasons, all work in pits must be
supervised by a person outside the pit.
Make all maintenance
and service work when
the pump is placed out-
side the pit.
DANGER
Crushing hazard
Death or serious person-
al injury
‐Make sure that the
lifting bracket is tight-
ened before lifting
the pump.
Carelessness during lifting or transportation may
cause personal injury or damage to the pump.
DANGER
Electric shock
Death or serious person-
al injury
‐It must be possible to
lock the main switch
in position 0. Type
and requirements as
specified in EN
60204-1.
13
English (GB)

DANGER
Electric shock
Death or serious person-
al injury
‐Make sure there are
at least 3 m free ca-
ble above the maxi-
mum liquid level.
DANGER
Crushing hazard
Death or serious person-
al injury
‐Make sure that the
lifting bracket is tight-
ened before lifting
the pump.
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 installation type can be
found at the end of this booklet.
Before installing the
product, make sure that
the bottom of the pit is
even.
WARNING
Electric shock
Death or serious person-
al injury
‐It must be possible to
switch off the power
supply and lock the
main switch in posi-
tion 0 to ensure that
the power supply
cannot be switched
on unintentionally.
‐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.
14
English (GB)

Inspect the oil level and
condition every 3000 op-
erating 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 con-
tent after one week of
operation.
Use the lifting bracket
only for lifting the pump.
Do not use it to hold the
pump during operation.
DANGER
Electric shock
Death or serious person-
al injury
‐Before installing the
pump and starting it
up for the first time,
check the power ca-
ble for visible defects
to avoid short cir-
cuits.
CAUTION
Biological hazard
Minor or moderate per-
sonal injury
‐Flush the pump thor-
oughly with clean
water and rinse the
pump parts after
dismantling. Pits for
submersible drain-
age and effluent
pumps may contain
drainage or effluent
with toxic and/or con-
tagious substances.
‐Wear appropriate
personal protective
equipment and cloth-
ing.
‐Observe the local hy-
giene regulations in
force.
CAUTION
Sharp element
Minor or moderate per-
sonal injury
‐Do not touch the
sharp edges of the
impeller without
wearing protective
gloves.
15
English (GB)

Always use Grundfos
accessories to avoid
malfunctions due to in-
correct installation.
WARNING
Electric shock
Death or serious person-
al injury
‐It must be possible to
switch off the power
supply and lock the
main switch in posi-
tion 0 to ensure that
the power supply
cannot be switched
on unintentionally.
‐Any external voltage
connection to the
pump must be
switched off before
working on the
pump.
DANGER
Electric shock
Death or serious person-
al injury
‐Before installing the
pump and starting it
up for the first time,
check the power ca-
ble for visible defects
to avoid short cir-
cuits.
CAUTION
Biological hazard
Minor or moderate per-
sonal injury
‐Flush the pump thor-
oughly with clean
water and rinse the
pump parts after dis-
mantling. Pits for
submersible drain-
age and effluent
pumps may contain
drainage or effluent
with toxic and/or con-
tagious substances.
‐Wear appropriate
personal protective
equipment and cloth-
ing.
‐Observe the local hy-
giene regulations in
force.
CAUTION
Sharp element
Minor or moderate per-
sonal injury
‐Do not touch the
sharp edges of the
impeller without
wearing protective
gloves.
Dry installation
Tightening torques for inlet and outlet flanges
Grade 4.6 (5) galvanised steel screws and nuts.
16
English (GB)

DN DC Screw
Torque [Nm +/- 5]
Slightly
oiled
Well lubri-
cated
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 Screw
Torque [Nm +/- 5]
Slightly
oiled
Well lubri-
cated
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 pa-
per gasket, such as Klin-
gersil C4300. If softer
gasket material is used,
torques must be recon-
sidered.
Electrical connection
WARNING
Electric shock
Death or serious person-
al injury
‐Before starting any
work on the product,
make sure that the
fuses have been re-
moved or the main
switch has been
switched off and
locked in position 0.
Make sure that the
power supply cannot
be switched on unin-
tentionally.
WARNING
Electric shock
Death or serious person-
al injury
‐Make sure the earth
and phase conduc-
tors are not mixed
up, follow the de-
scription in the wiring
diagram.
‐Make sure the earth
conductor is connec-
ted first.
17
English (GB)

Connect the pump to an
external main switch
which ensures all-pole
disconnection with a
contact separation ac-
cording to EN 60204 1.
Make sure that the main
switch is locked in posi-
tion 0. Type and require-
ments as specified in EN
60204-1.
The electrical connection
must be carried out in
accordance with local
regulations.
Set the motor-protective circuit breaker to the rated
current of the pump. The rated current is stated on
the nameplate.
In hazardous locations,
connect pumps to a con-
trol box with a motor pro-
tection relay with IEC trip
class 10.
Set the motor-protective
circuit breaker to the rat-
ed current of the pump.
The rated current is sta-
ted on the nameplate.
A damaged power cable
must be replaced by the
manufacturer, its service
agent or similarly quali-
fied persons.
WIO sensor
Every explosion-proof pump is assembled with a WIO
sensor.
For safe installation and operation of pumps equipped
with a WIO sensor, install an RC filter between the
power supply and the pump.
If an RC filter should be
installed to avoid any
kind of transients in the
installation, install it be-
tween the power supply
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 cables are running in
parallel close to each other, the risk of
transients causing interference between power
and signal cables increases with the length of
the cables.
• Switchboard layout:
- Power and signal cables must be 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 can 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 EMC-related issues
that must be taken into consideration.
For further information, see the installation and
operating instructions for the selected control box or
pump controller.
Frequency converter operation
In principle, all three-phase motors can be connected
to a frequency converter.
However, frequency converter operation often
exposes the motor insulation system to a heavier load
and causes the motor to be more noisy due to eddy
currents caused by voltage peaks.
In addition, large motors operated with a frequency
converter are loaded by bearing currents.
18
English (GB)

For frequency converter operation, observe the
following:
• The thermal protection of the motor must be
connected.
• 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 is not taken into account. See
the frequency converter data sheet regarding the
actual values and the cable influence on the peak
voltage and dU/dt.
• Minimum switching frequency is 2.5 kHz. Variable
switching frequency is accepted.
• If the pump is Ex-approved, 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 complied
with.
Before installing a frequency converter, calculate the
lowest permissible frequency in the installation to
avoid zero flow.
• Do not reduce the motor speed to less than 30 %.
• Keep the flow rate above 1 m/sec.
• Let the pump run at rated speed at least once a
day to prevent sedimentation in the piping system.
• Do not exceed the frequency indicated on the
nameplate as this may cause motor overload.
• Keep the power cable as short as possible. The
peak voltage increases with the length of the
power cable.
• Use input and output filters on the frequency
converter.
• Use a screened power cable, if there is a risk that
electrical noise may disturb other electrical
equipment.
• Set frequency converter for constant-torque
operation. Pulse width modulation should be
used.
When operating the pump by a frequency converter,
consider the following:
• The locked rotor torque can be lower depending
on the type of the frequency converter.
• The noise level may increase. See the installation
and operating instructions for the selected
frequency converter.
Maximum repetitive
peak voltage
[V]
Maximum dU/dt UN 400 V
[V/μ sec.]
850 2000
Frequency converter use
may reduce the lifespan
of the bearings and the
shaft seal, depending on
operating mode and oth-
er circumstances.
For more information about the frequency converter
operation, see the data sheet and the installation and
operating instructions for the selected frequency
converter.
Pump controllers
The pumps can be controlled by the Grundfos LC
231, LC 241, DC and DCD controllers.
Pumps with a sensor are supplied with an IO 113,
which can receive signals from the following
transmitters:
• water-in-oil (WIO) sensor in the pump
• moisture sensor in the motor
• temperature sensor in the stator windings
• winding resistance sensor in the motor.
For further information, see installation and operating
instructions for the specific sensor.
Level controllers
The pump must not run
dry.
Install an additional level
switch to ensure that the
pump is stopped in case
the stop level switch is
not operating.
The pump must be stop-
ped when the liquid level
reaches the upper edge
of the clamp.
19
English (GB)

Float switches used in
potentially explosive en-
vironments must be ap-
proved for this applica-
tion. They must be
connected to the Grund-
fos LC 231 or LC 241
level controller by an in-
trinsically safe barrier to
ensure a safe circuit. In
potentially explosive en-
vironments, the anti-
seizing function must be
disabled on the pump
controllers.
Thermal switch, PT1000 and thermistor (PTC)
Explosion-proof pumps
The thermal protection
of explosion-proof
pumps must not restart
the pump automatically.
This ensures protection
against overtemperature
in potentially explosive
environments. In pumps
with sensor, this can be
done by removing the
short circuit between ter-
minals R1 and R2 in the
IO 113.
See electrical data in the IO 113 installation and
operating instructions.
Do not install the sepa-
rate motor-protective cir-
cuit breaker or control
box installed in potential-
ly explosive environ-
ments.
WIO sensor
The WIO sensor measures the water content in the
oil and converts the value into an analog current
signal. The two sensor conductors are for power
supply as well as for carrying the signal to the IO 113.
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).
The IO 113 module must
be configured to stop ex-
plosion-proof pumps in
case the WIO sensor
sends an alarm signal.
The pump must not re-
start automatically.
The sensor is fitted in a stainless steel tube for
mechanical protection.
3
2
1
59
12
TM031164
20
English (GB)