Wilo Rexa PRO Series User manual

Pioneering for You
Wilo-Rexa PRO
6065992 Ed.04-07/2015 WH
US Installation and operating instructions
fr Notice de montage et de mise en service
es Instrucciones de instalación y funcionamiento

Fig. 3
Fig. 2
Fig. 1
1
5
7
6
3
4
2
1
5
6
6
33
4
2
S1
S1/S2/S3
7a
7b
1
1
5
9
6
3
4
2
S1
S1/S2/S3
8
7b
7a
d
AA
min. 1 x d
A
d
min.
0,3 x d
B

Fig. 5
Fig. 6
Fig. 4
1
4
8
3
36
5
2
7
U1/Z1
3
U2
4
Cr
Z2
5
CS
M 1~
gn-ye
LNPE
1 2 6
3 4
gn-ye
1 2 6
2120 DK
5
1 2
4
3
M 3~
gn-ye
WV 2120UPE
6
DK
5
1 2
4
3
M 3~
gn-ye
WV 1110UPE
6
DK

Fig. 7
5
1
max. °C
min. °C
2
4
3
M 3~
gn-ye
WV 2021UPE
6
22
5
1 2
4
3
M 3~
gn-ye
WV 1011UPE
6
12
max. °C
min. °C
Fig. 8
5 4 3
W1V1U1
5 4 3
W2V2U2
1
max. °C
min. °C
2
M 3~
gn-ye
2021PE
6
22
5
1 2
4 3
M 3~
gn-ye
W1V1 1011U1
5 4 3
W2V2U2PE
6
12
max. °C
min. °C

Fig. 9
1

Installation and operating instructions Wilo-Rexa PRO 9
US English
1. Introduction 10
1.1. About this document 10
1.2. Personnelqualications 10
1.3. Copyright 10
1.4. Subject to changes 10
1.5. Warranty 10
2. Safety 11
2.1. Instructions and safety information 11
2.2. General safety 11
2.3. Electrical work 12
2.4. Safety and monitoring devices 12
2.5. Conduct during operation 12
2.6. Fluids 12
2.7. Sound pressure 13
2.8. Note on conformity 13
3. Product description 13
3.1. Intendeduseandeldsofapplication 13
3.2. Setup 13
3.3. Operation in an explosive atmosphere 14
3.4. Operating modes 14
3.5. Technical data 15
3.6. Type key 16
3.7. Scope of delivery 16
3.8. Accessories 16
4. Transport and storage 16
4.1. Delivery 16
4.2. Transport 16
4.3. Storage 16
4.4. Return delivery 17
5. Installation 17
5.1. General 17
5.2. Installation methods 18
5.3. Installation 18
5.4. Dry-running protection 21
5.5. Electrical connection 21
5.6. Motor protection and activation types 23
6. Commissioning 24
6.1. Electrical system 24
6.2. Rotation control 24
6.3. Level control 25
6.4. Operation in potentially explosive areas 25
6.5. Commissioning 25
6.6. Conduct during operation 25
7. Decommissioning/disposal 26
7.1. Temporary decommissioning 26
7.2. Decommissioning for maintenance work
or storage 26
7.3. Removal 26
7.4. Return delivery/storage 27
7.5. Disposal 27
8. Maintenance and repair 27
8.1. Operating materials 28
8.2. Maintenance intervals 28
8.3. Maintenance work 28
9. Troubleshooting 29
10. Appendix 31
10.1. Operation with frequency converters 31
10.2. Ex-approval 31
10.3. Spare parts 33

10 WILO SE 2015-07 V05 Letter
US English INTRODUCTION
1. Introduction
1.1. About this document
The language of the original operating instructions
is German. All other languages of these instructions
are translations of the original operating instruc-
tions.
The instructions are divided into individual sections,
which are listed in the table of contents. Each sec-
tion has a heading that clearly describes its content.
A copy of the EC declaration of conformity is a com-
ponent of these operating instructions.
Ifatechnicalmodicationismadeonthedesigns
named there without our agreement, this declara-
tion loses its validity.
1.2. Personnel qualications
All personnel who work on or with the pump must
bequaliedforsuchwork;electricalwork,for
example,mayonlybecarriedoutbyaqualied
electrician. All personnel must be of legal age.
Operating and maintenance personnel must also
observe national accident prevention regulations.
It must be ensured that personnel have read and
understood the instructions in this operating and
maintenancemanual;ifnecessary,thismanualmust
be ordered from the manufacturer in the required
language.
This pump is not intended for use by persons (in-
cluding children) with limited physical, sensory, or
mental capacities or without the relevant experi-
ence or knowledge, unless they are supervised by
a person responsible for their safety and receive
instructions from that person on how to use the
pump.
Children must be supervised in order to ensure that
they do not play with the pump.
1.3. Copyright
This operating and maintenance manual has been
copyrighted by the manufacturer. The operating
and maintenance manual is intended for use by
installation, operating, and maintenance personnel.
It contains regulations and drawings which may not
be reproduced or distributed, either completely or
in part, or used for any competitive purpose without
the expressed consent of the manufacturer. Illustra-
tions may differ from the original and serve only as
example illustrations of the pumps.
1.4. Subject to changes
The manufacturer reserves the right to make tech-
nicalmodicationstounitsorcomponents.This
operating and maintenance manual refers to the
pump shown on the title page.
1.5. Warranty
Ingeneral,thespecicationsinthecurrent“general
terms and conditions” apply for the warranty. You
canndthesehere:
www.wilo.com/legal
Any deviations must be contractually agreed and
shall then be given priority.
1.5.1. General
The manufacturer is obliged to correct any de-
fects found in the pumps it sells, provided that the
defects meet one or more of the following require-
ments:
• The defects are caused by the materials used or the
way the product was manufactured or designed.
• The defects were reported in writing to the manu-
facturer within the agreed warranty period.
• The pump was used only as prescribed.
• All monitoring devices are connected and were
tested before commissioning.
1.5.2. Warranty period
The duration of the warranty period is stipulated in
the“generaltermsandconditions.”
Any deviations must be contractually agreed.
1.5.3. Spare parts, attachments, and modications
Only genuine spare parts from the manufacturer
may be used for repairs, replacements, attach-
ments,andmodications.Unauthorizedadd-ons
andmodicationsortheuseofnon-originalspare
parts can seriously damage the pump and/or injure
personnel.
1.5.4. Maintenance
The prescribed maintenance and inspection work
should be carried out regularly. This work may only
becarriedoutbyqualied,trained,andauthorized
personnel.
1.5.5. Damage to the product
Damage and malfunctions that endanger safety
must be eliminated immediately by trained per-
sonnel. The pump may only be operated if it is in
perfect working order.
In general, repairs should only be carried out by Wilo
customer service.
1.5.6. Disclaimer
No warranty claims will be accepted and no liability
will be assumed for pump damage if any of the fol-
lowingitemsapply:
• Inadequate dimensioning by the manufacturer due
toinsufcientand/orincorrectinformationprovided
by the end user or customer
• Non-compliance with safety instructions and work-
inginstructionsasspeciedinthisoperatingand
maintenance manual
• Improper use
• Incorrect storage and transport
• Improper assembly/dismantling
• Insufcientorincorrectmaintenance
• Incorrect repairs

Installation and operating instructions Wilo-Rexa PRO 11
SAFETY US English
• Inadequate construction site or construction work
• Chemical,electrochemical,andelectricalinuences
• Wear
This means the manufacturer’s liability excludes
all liability for personal injury, material damage, or
nanciallosses.
2. Safety
This section lists all the generally applicable safety
information and technical instructions. In addition,
alltheothersectionscontainspecicsafetyinfor-
mation and technical instructions. All instructions
and information must be observed and followed
during the various phases of the pump’s life cycle
(installation, operation, maintenance, transport,
etc.). The end user is responsible for ensuring that
all personnel follow these instructions and guide-
lines.
2.1. Instructions and safety information
This manual uses instructions and safety infor-
mation regarding possible injury and damage to
property. To identify them clearly for personnel, the
instructions and safety information are distin-
guishedasfollows:
• Instructions appear in bold and refer directly to the
preceding text or section.
• Safety information is slightly indented and bold and
always starts with a signal word.
• Danger
Serious or fatal injuries can occur!
• Warning
Serious injuries can occur!
• Caution
Injuries can occur!
• Caution (instruction without symbol)
Substantial property damage can occur. Irrepa-
rable damage is possible!
• Note
Additional information on the current topic.
• Safety information that refers to personal injury
appears in black and is always accompanied by a
safety symbol. Danger, prohibition, or instruction
symbols are used as safety symbols.
Example:
Dangersymbol:Generalhazard
Danger symbol, for example, electrical current
Prohibition symbol, for example, Keep out!
Instruction symbol, for example, wear protective
clothing
The safety symbols used conform to generally ap-
plicable directives and regulations.
• Safety information that refers only to material dam-
age is printed in gray, without safety symbols.
2.2. General safety
• When installing or removing the pump, never work
alone in rooms or sumps. A second person must
always be present.
• The pump must always be switched off before any
work is performed on it (assembly, dismantling,
maintenance, installation). The pump must be dis-
connected from the electrical system and secured
against being switched on again. All rotating parts
must have come to a stop.
• The operator should inform his/her superior imme-
diately should any defects or irregularities occur.
• The operator must shut down the equipment im-
mediately if defects occur that represent a safety
risk.Theseinclude:
• Failure of the safety and/or monitoring devices
• Damage to important parts
• Damage to electrical equipment, cables, and
insulation.
• Tools and other objects should be kept in their des-
ignated places to ensure they can be used safely.
• Sufcientventilationmustbeprovidedwhenwork-
ing in enclosed rooms.
• When welding or working with electronic devices,
make sure there is no risk of explosion.
• Useonlyliftinggearwhichislegallydenedassuch
andofciallyapproved.
• The lifting gear must be adapted to the conditions
of use (weather, guide system, load, etc.) and be
stored carefully.
• Mobile equipment for lifting loads should be used
in such a way that it is guaranteed to remain stable
during operation.
• When using mobile equipment for lifting non-guid-
ed loads, take action to prevent tipping, shifting,
sliding, etc.
• Take measures to prevent anyone standing under
suspended loads. Furthermore, it is prohibited to
move suspended loads over working areas occupied
by people.
• If using mobile operating equipment for lifting
loads, get a second person to coordinate the proce-
dure if necessary (e.g. blocked visibility).
• The load to be lifted must be transported in such
a way that no one will be injured if there is a power
failure. Furthermore, if such work is being carried
out outdoors, it must be canceled if the weather
conditions worsen.

12 WILO SE 2015-07 V05 Letter
US English SAFETY
These instructions must be strictly observed.
Non-observance can result in injury or substantial
material damage.
2.3. Electrical work
DANGER: electrical hazard!
Incorrectly performed electrical work can result
in fatal injury! This work may only be carried out
by a qualied electrician.
CAUTION: beware of moisture!
Moisture penetrating the cable will damage
both the pump and the cable. Never immerse
the cable end in uid and always protect it from
moisture. Unused wires must be insulated!
Our pumps are operated with single or three phase
alternating current. The governing national direc-
tives, standards, and regulations (e.g. VDE 0100) as
well as the requirements of the local energy supply
company must be observed.
The person operating the pump must know where
it is supplied with power and how to cut off the
supply. A motor protection switch must be installed
by the customer for three phase AC motors. It is
advisable to install a residual-current device (RCD).
If there is a possibility that people can come into
contactwiththepumpandtheuid(forexample
on construction sites), the connection must be
equipped with an additional residual current device
(RCD).
Thesectionentitled“Electricalconnection”mustbe
observed when connecting the product. The techni-
calspecicationsmustbeobservedstrictly.Our
pumps must always be grounded.
If the pump has been switched off by a protective
device, it must not be switched on again until the
fault has been eliminated.
When the pump is connected to the electrical con-
trol panel, particularly when electronic devices such
as soft start control or variable frequency drives are
used,theswitchgearmanufacturer’sspecications
must be followed to comply with the electromag-
netic compatibility (EMC) requirements. Special
separate shielding measures (e.g. shielded cables,
lters,etc.)maybenecessaryforthepowersupply
and control cables.
The connection may only be made if the switch-
gear complies with the harmonized EU standards.
Cellphones and other mobile radio equipment may
cause malfunctions in the system.
WARNING: electromagnetic radiation!
Electromagnetic radiation can pose a fatal risk
for people with cardiac stimulators. Afx cor-
responding signs to the unit and inform affected
persons accordingly!
2.4. Safety and monitoring devices
The pumps are equipped with a thermal winding
monitor and motor leakage detection. If the motor
becomestoohotduringoperationorifuidleaks
into the motor, the pump is switched off.
These devices must be connected by an electrician
and checked to ensure that they function correctly
before commissioning.
Personnel must be informed about the installed
devices and how they work.
Caution!
Never operate the pump if the monitoring de-
vices have been removed or damaged, or if they
do not work.
2.5. Conduct during operation
When operating the pump, always follow the
locally applicable laws and regulations for work
safety, accident prevention, and handling electrical
machinery. To help ensure safe working practice,
the responsibilities of employees should be clearly
speciedbytheoperator.Allpersonnelarerespon-
sible for ensuring that regulations are observed.
Due to their design, centrifugal pumps have rotating
parts that are easily accessible. Depending on the
operating conditions, sharp edges can develop on
these parts.
WARNING: danger of crushing and amputation
of limbs!
Sharp edges can form on the rotating parts in
the hydraulics. These can result in crushing and
amputation of limbs.
• Never reach into the hydraulics when the ma-
chine is in operation.
• Before performing maintenance or repairs,
switch off the pump, disconnect it from the
power supply, and secure it against being
switched on again without authorization.
• Always allow the rotating parts to come to a
standstill!
2.6. Fluids
Eachuiddiffersinrespectofcomposition,cor-
rosiveness, abrasiveness, dry matter content, and
in many other aspects. Generally, our pumps can
be used for many applications. Please note that if
requirements change (density, viscosity, or general

Installation and operating instructions Wilo-Rexa PRO 13
PRODUCT DESCRIPTION US English
composition), this can also affect many parameters
of the pump.
If the pump is used in or switched over to a different
uid,observethefollowingpoints:
• Theuidcanbecontaminatedbyoilfromtheseal-
ing chamber if the mechanical seal is defective.
Use with potable water is not permitted!
• Pumps that have been operated in dirty waste water
must be cleaned thoroughly before being used for
otheruids.
• Pumps that have been operated in sewage water
containingfecesand/oruidsthatarehazardousto
health must be decontaminated before being used
withotheruids.
Clarication must be sought as to whether the
pump can be used with another uid at all.
2.7. Sound pressure
Dependingonthesizeandperformance(kW)ofthe
pump, it has a sound pressure level of approximately
70 dB (A) to 90 dB (A) during operation.
However, the actual sound pressure level depends
on several factors. These include, for example, the
installationdepth,installationmethod,xationof
accessories and piping, the duty point, immersion
depth, etc.
We recommend that the end user takes an addition-
al measurement at the workplace once the pump
is running at its duty point and under all operating
conditions.
CAUTION: Wear ear defenders!
According to applicable laws and regulations,
ear protection must be worn if the sound pres-
sure level is 85dB(A) or more. The end user is
responsible for ensuring compliance with this
regulation.
2.8. Note on conformity
This product was developed and manufactured in
accordance with the applicable EU product direc-
tives, to which all products sold in the EU must
conform.
This product therefore complies with the relevant,
general safety and health requirements of the
European Union, as well as the published European
standardsandinternationallyrecognizedGerman
standards.
Since this product was not intended to be sold and
used in the European Union, it does not have a CE
marking.
It is therefore not permitted to sell it in the Euro-
pean Union.
3. Product description
The pump is manufactured with great care and is
subject to constant quality controls. Trouble-free
operation is guaranteed if it is installed and main-
tained correctly.
3.1. Intended use and elds of application
DANGER: electrical hazard
When using the pump in swimming pools or
other basins that can be entered, there is a risk
of electrocution. Note the following:
• Use is strictly forbidden if there are people in the
pool or basin!
• If there are no people in the pool or basin, pro-
tective measures must be taken in accordance
with DINVDE0100-702.46 (or the appropriate
national regulations).
DANGER: explosive uids!
Pumping explosive uids (e.g. gasoline, kero-
sene, etc.) is strictly prohibited. The pumps are
not designed for these uids!
Wilo-Rexa PRO… submersible pumps are suitable
forpumpingthefollowinguids,inintermittentor
permanentoperation:
• Wastewater
• Sewage containing feces
• Sludges with up to 8% dry matter (depending on
pump type)
The submersible pumps must not be used for
pumpingthefollowing:
• Potable water
• Fluids containing hard components such as stone,
wood, metal, sand, etc.
• Highlyammableandexplosiveuidsinpureform
Intended use also includes compliance with these
instructions. Any other use is regarded as improper
use.
3.2. Setup
The Wilo-Rexa pumps are submersible sewage
pumps that can be operated vertically in station-
ary or portable wet well installation and vertically in
stationary dry well installation.
Fig. 1.: Description
1 Cable 5 Hydraulics housing
2 Handle 6 Suction connection
3 Motor housing 7 Pressure connection
4 Seal housing

14 WILO SE 2015-07 V05 Letter
US English PRODUCT DESCRIPTION
3.2.1. Hydraulics
Rotodynamic hydraulics with single-channel or
vorteximpeller,withhorizontalangeconnection
on the pressure side.
The hydraulics are not self-priming, in other
words, the uid must ow in either under natural
pressure or under supply pressure.
3.2.2. Motor
Single or three phase AC dry motors are used as the
motors.Themotoriscooledbytheuidaroundit.
Thewasteheatistransferreddirectlytotheuidvia
the motor housing.
NOTE
When the motor is non-immersed, observe and
complywiththespecicationsfor“non-immersed
operating mode”!
In the single-phase version, the start and operat-
ing capacitor is integrated in an external capacitor
switchgear in the connection cable.
Theconnectioncablehasalengthof40ft(12.5m),
is longitudinally watertight, and is available in fol-
lowingversions:
• Cable with plug
• Bare cable end
3.2.3. Monitoring equipment
• Motor compartment monitor:
The motor compartment monitor signals water
ingress into the motor compartment.
• Thermal motor monitor:
The thermal motor monitor protects the motor
winding from overheating. Bimetallic strips are used
for this as standard. The motors can be equipped
with PTC sensors as an option.
• P13motor:
Single-circuit temperature monitoring as tem-
perature limiter. When the threshold is reached,
the unit must switch off!
• P17motor:
2-circuit temperature monitoring as temperature
controller and temperature limiter. When the low
threshold is reached, a preliminary warning may
be issued, when the high threshold is reached, the
motor must switch off!
Themotorcanalsobettedwithanexternalpencil
electrode to monitor the sealing chamber. This sig-
nals if there is water ingress into the sealing cham-
berthroughthemechanicalsealontheuidside.
3.2.4. Seal
Thesealfortheuidandthemotorcompart-
ment is made via two mechanical seals. The sealing
chamberbetweenthemechanicalsealsislledwith
environmentally safe medicinal white oil.
3.2.5. Materials
• Motorhousing:
ASTM A48 Class 35/40B (EN-GJL-250)
• Hydraulichousing:
ASTM A48 Class 35/40B (EN-GJL-250)
• Impeller:
ASTM A48 Class 35/40B (EN-GJL-250)
• Shaftend:AISI420(1.4021)
• Staticgaskets:Nitrile(NBR)
• Seal
• Onpumpside:SiC/SiC
• Onmotorside:C/MgSiO4
3.2.6. Attached plug
In the "P" version, there is a corresponding plug for
either single-phase or three-phase power sockets.
These plugs are designed for use in commercially
availablesocketsandarenotwatertight(overow-
proof).
CAUTION: beware of moisture!
Ingress of moisture will result in damage to the
plug. Never immerse the plug in uid and always
protect it from moisture.
3.3. Operation in an explosive atmosphere
Pumpswiththe“Ex”markingaresuitableforopera-
tion in an explosive atmosphere. The pumps must
meet certain guidelines for this type of use. Certain
rules of conduct and guidelines must be also fol-
lowed by the operator.
Pumps that have been approved for use in an explo-
sive atmosphere must be marked as follows on the
ratingplate:
• “Ex”symbol
• InformationonExclassication
For use in an explosive atmosphere, observe the
further specications in the appendix to this
manual
DANGER: from incorrect use!
When used in an explosive atmosphere, the
pump must have a corresponding approval. Also,
the accessories must be approved for this appli-
cation. Check the pump as well as all accessories
before use to verify that they are approved in
accordance with regulations.
3.4. Operating modes
3.4.1. Operating mode S1 (permanent operation)
The pump can operate continuously at the rated
load without exceeding the permissible tempera-
ture.

Installation and operating instructions Wilo-Rexa PRO 15
PRODUCT DESCRIPTION US English
3.4.2. Operating mode S2 (short term operation)
Themaximumoperatingperiodisspeciedin
minutes, e.g. S2-15. The pause must last until the
machinetemperatureisnomorethan2Kawayfrom
the temperature of the coolant.
3.4.3. Operating mode S3 (intermittent operation)
Thisoperatingmodedenesacombinationofpe-
riods of operation and standstill. With S3 operation,
the values given are always calculated based on a
periodof10minutes.
Example: S3 25%
Operatingtime25%of10min=2.5min/standstill
time75%of10min=7.5min
3.4.4. "Non-immersed operation" operating mode
The "non-immersed operation" operating mode de-
scribes the possibility of the motor emerging during
the drainage pumping sequence in a wet well instal-
lation, which enables a further lowering of the water
level as far as the upper edge of the hydraulics.
During non-immersed operation, the medium
and ambient temperature must not exceed 104°F
(40°C).
• P13 motor: Non-immersed operation is permis-
sibleinaccordancewiththespecication"Non-
immersed operating mode" on the rating plate.
• P17 motor: Non-immersed operation is not per-
mitted!
3.5. Technical data
* S1 operation when non-immersed is not possible
with all motors. Observe the information on the
rating plate.
**OperatingmodeS350%ispermissibleifthe
necessary motor cooling is guaranteed by complete
immersion for at least 1 minute before the motor is
switched back on again.
Thespeciedtechnicaldataapplytothestandard
pumps in the PRO series.
The technical data for freely congured pumps in
the PRO series can be found in the relevant order
conrmation.
General data
Linepower[V/F]: See rating plate
Power consumption [P1]: See rating plate
Rated motor power [P2]: See rating plate
Maximumdeliveryhead[H]: See rating plate
Maximumvolumeow[Q]: See rating plate
Activationtype[AT]: See rating plate
Fluidtemperature[t]: 37…104°F(3…40°C)
Protectionclass: IP 68 (permanently im-
mersed)
Insulationclass[Cl.]: F (optionally H)
Speed[n]: See rating plate
Max.immersiondepth: 66 ft (20 m)
Explosionprotection: FM
Operating modes
Immersed [OTS]: S1
Non-immersed [OTE]:
-P13motor: S1*,S230min,S325%**
-P17motor: -
Switching frequency
Recommended: 20/h
Maximum: 50/h
Free ball passage
PROV05-…: 2in(50mm)
PROV06-…: 2.5in(65mm)
PROV08-…: 3in(80mm)
PROC05-…: 1.8in(45mm)
PROC06-…: 1.8in(45mm)
PROC08-41…: 2.6in(65mm)
PROC08-43…: 2.8in(70mm)
PROC10-51…: 4in(100mm)
Suction connection:
PRO…05-…: DN 50, PN 10
PRO…06-…: DN 65, PN 10
PRO…08-…: DN 80, PN 10
PRO…10-…: DN 100, PN 10
Pressure connection:
PRO…05-…: ANSI B16.1 125lbs 2
PRO…06-…: ANSI B16.1 125lbs 2.5/3
PRO…08-…: ANSI B16.1 125lbs 3
PRO…10-…: ANSI B16.1 125lbs 4

16 WILO SE 2015-07 V05 Letter
US English TRANSPORT AND STORAGE
3.6. Type key
Example: Wilo-Rexa
PRO V06DA-110/EAD1F2-T0015-646-O
PRO Series
V
Impeller shape
V=vorteximpeller
C=single-channelimpeller
06
Pressureconnectionsize
05=B16.12
06=B16.12.5/3
08=B16.13
10=B16.14
D
Hydraulic version
D=suctionsidedrilledacc.toDIN
N=suctionsidedrilledacc.toNorthAmerican
Standard (ANSI)
A
“Hydraulic”materialversion
A=standardversion
Y=specialversion
110 Hydraulics type
E
Motor version
E=glandedmotor
R=reduced-powerglandedmotor
A
“Hydraulic”materialversion
A=standardversion
Y=specialversion
D
Seal version
D=2independentmechanicalseals
B=cartridgeseal
1
IEefciencyclass(basedonIEC60034-30)
1=IE1(Standardclass)
3=IE3(Premiumclass)
F
WithEx-rating:
X=ATEX
F=FM
C=CSA
2Number of poles
T
Line power version
M=1~
T=3~
0015 /10=ratedpowerP2in kW
6
Frequency
5=50Hz
6=60Hz
46 Key for rated voltage
O
Additional electrical equipment
O=withbarecableend
P=withplug
3.7. Scope of delivery
Standard product
• Pumpwith40ft(12.5m)cable
• Single phase version with capacitor switchgear and
free cable end
• Three phase version with
• bare cable end
• with CEE plug
• Installation and operating instructions
Freely congured products
• Pump with cable length per customer request
• Cable version
• with bare cable end
• with plug
• withoatswitchandbarecableend
• withoatswitchandplug
• Installation and operating instructions
3.8. Accessories
• Cablelengthsupto160ft(50m)inxedlength
incrementsof40ft(12.5m)orcustomizedcable
lengths on request
• Guide system
• Pump foot
• External pencil electrode for sealing chamber con-
trol
• Level controls
• Fixing accessories and chains
• Switchgears, relays, and plugs
• Ceram coating
• Thermal motor monitoring with PTC sensors
4. Transport and storage
4.1. Delivery
On delivery, check immediately that the shipment is
complete and undamaged. If any parts are damaged
or missing, the transport company or the manu-
facturermustbenotiedonthedayofdelivery.
Claimsmadeafterthisdatecannotberecognized.
Any damage to parts must be noted on the freight
documentation.
4.2. Transport
Only the appropriate and approved fastening de-
vices and transportation and lifting equipment may
beused.Thesemusthavesufcientloadbearing
capacity to ensure that the pump can be transport-
ed safely. If chains are used they must be secured
against slipping.
Thepersonnelmustbequaliedforthetasksand
must follow all applicable national safety regula-
tions during the work.
The pumps are delivered by the manufacturer or
shipping agency in suitable packaging. This nor-
mally precludes the possibility of damage occurring
during transport and storage. The packaging should
be stored in a safe place for reuse if the product is
frequently used at different locations.
4.3. Storage
Newly supplied pumps are prepared so that they can
be stored for at least 1 year. The pump should be
cleaned thoroughly before it is put into temporary
storage.

Installation and operating instructions Wilo-Rexa PRO 17
INSTALLATION US English
The following should be taken into consideration for
storage:
• Placethepumponarmsurfaceandsecureit
against slipping and falling over. Submersible sew-
age pumps are stored vertically.
DANGER: from falling
Never set the pump down unsecured. If the
pump falls over, it could cause an injury.
• Our pumps can be stored at temperatures down to
+5°F(-15°C).Thestorageareamustbedry.We
recommend a frost-protected room for storage
withatemperaturebetween41°F(5°C)and77°F
(25°C).
• Do not store the pump in rooms in which welding
work is carried out, because the resulting gases or
radiation can damage the elastomer components
and coating.
• Suction and pressure connections must be sealed
securely to prevent the entry of contamination.
• All power supply cables must be protected against
kinking, damage, and moisture ingress.
DANGER: electrical hazard!
Damaged power supply cables can cause fatal
injury! Defective cables must be replaced by a
qualied electrician immediately.
CAUTION: beware of moisture!
Moisture penetrating the cable will damage
both the pump and the cable. Never immerse
the cable end in uid and always protect it from
moisture.
• The pump must be protected from direct sunlight,
heat, dust, and frost. Heat or frost can cause serious
damage to impellers and coatings!
• The impellers should be checked at regular intervals.
This prevents jamming of the bearings and it renews
thelmoflubricationonthemechanicalseal.
WARNING: sharp edges!
Sharp edges can form on the impellers and
hydraulic openings. There is a risk of injury!
Wear the necessary protective clothing, such as
protective gloves.
• If the pump has been stored for a long period of
time, it should be cleaned of contaminants such as
dust and oil residue before commissioning. Check
that the impellers move freely and check the hous-
ing coatings for damage.
Prior to commissioning, the ll level in the seal-
ing chamber should be checked and topped up, if
necessary.
Damaged coatings must be repaired immedi-
ately. Only an intact coating fullls its intended
purpose.
Please note that elastomer parts and coatings be-
come brittle over time. If the product is to be stored
for longer than 6 months, we recommend checking
these parts and replacing them as necessary. Con-
sult the manufacturer for details.
4.4. Return delivery
Pumps that are returned to the factory must be
properly packaged. This means that impurities have
been removed from the pump and that it has been
decontaminatedifusedwithuidsthatarehazard-
ous to health.
For shipping, the parts must be packed in tear-proof
plasticbagsofsufcientsizeinsuchamannerthat
they are tightly sealed and leak proof. Furthermore,
the packaging must protect the pump from damage
during transportation. If you have any questions,
please contact the manufacturer.
5. Installation
In order to prevent damage to the product or serious
injury during installation, the following points must
beobserved:
• Installation work – assembly and installation of
thepump–mayonlybecarriedoutbyqualied
persons. The safety instructions must be followed
at all times.
• The pump must be inspected for transport damage
before any installation work is carried out.
5.1. General
For planning and operation of sewage systems, ob-
serve the applicable local regulations and directives
for sewage technology (such as those of the Ger-
man Association for Water, Wastewater and Waste).
Note that pressure surges can occur, in particular
with stationary installations where water is pumped
with relatively long discharge pipes (especially with
steady ascents or steep terrain).
Pressure surges can result in destruction of the
pump/system and noise pollution due to valves
opening and closing suddenly. Pressure surges can
be prevented by applying suitable measures (e.g.
non-return valves with an adjustable closing time,
or special routing of the discharge pipeline).
After pumping water containing calcium, clay, or
cement,thepumpshouldbeushedwithpure
water to prevent encrustation and to avoid related
breakdowns later on.
If you are using level control, make sure that the
minimum water coverage is present. Air pockets
in the hydraulic housing or pipe system must be
avoided at all costs and must be removed by using
a suitable ventilation system and/or by placing the

18 WILO SE 2015-07 V05 Letter
US English INSTALLATION
pump at a slight angle (if installed as a portable
pump). Protect the pump from frost.
5.2. Installation methods
• Vertical stationary wet well installation with guide
system
• Vertical portable wet well installation with pump
foot
• Vertical stationary dry well installation
5.3. Installation
DANGER: from falling!
When installing the pump and its accessories,
work is sometimes performed directly at the
edge of the basin or sump. Carelessness or
wearing inappropriate clothing could result in a
fall. There is a risk of fatal injury! Take all neces-
sary safety precautions to prevent this.
The following information should be taken into
considerationwheninstallingthepump:
• Thisworkmustbecarriedoutbyaqualiedperson
and electrical work must be carried out by an elec-
trician.
• The operating space must be clean, free of coarse
solids, dry, frost-free and, if necessary, decontami-
nated. It must also be suitable for the particular
pump.
• When working in sumps, a second person must be
present for safety reasons. If there is a risk of toxic
or asphyxiating gases building up, the necessary
precautions must be taken.
• Thesystemplannershouldselectthesumpsizeand
motor cooling time according to the ambient condi-
tions in operation.
• Ensure that lifting equipment can be set up without
any trouble, since this is required for assembly and
removal of the pump. It must be possible to reach
the pump safely in its operating and storage loca-
tions using the lifting equipment. The machine must
bepositionedonarmbearingsurface.Fortrans-
porting the pump, the lifting gear must be secured
to the lifting eyelets or handle provided. When using
chains, they must be connected with a shackle to
the lifting eyelets or the handle. Lifting gear must
be technically approved.
• Power supply cables must be laid out in such a way
that safe operation and trouble-free assembly/dis-
mantling are possible at all times. The pump must
never be carried or dragged by the power supply
cable. Check whether the cable present is adequate
for the type of installation selected, in terms of its
cross-section and its length.
• When using switchgear, the corresponding protec-
tion class must be observed. In general, switchgear
is to be installed outside potentially explosive areas
in such a way that it is protected from submersion.
• When used in an explosive atmosphere, it must be
ensured that the pump and all accessories are ap-
proved for this purpose.
• Structural components and foundations must be of
sufcientstabilityinordertoallowtheproductto
bexedsecurelyandfunctionally.Theenduseror
the supplier is responsible for the provision of the
foundations and their suitability in terms of dimen-
sions, stability, and strength.
• Ifthemotorhousingistobetakenoutoftheuid
during operation, the operating mode for non-
immersed operation should be applied.
To keep glanded motors sufciently cooled in S3
mode, they must be ooded completely before
being switched back on if the motor has been
taken out of the uid!
• Never let the pump run dry. The water level must
never fall below the minimum. Therefore, we rec-
ommend installing a level control system or a dry-
running protection system where there are great
variations in the level.
• Useguideanddeectorplatesfortheuidintake.
If the water jet reaches the surface of the water, air
willbeintroducedintotheuid,whichcanaccumu-
late in the pipe system. This can result in inadmis-
sible operating conditions and to deactivation of
the entire system.
• Check that the available planning documentation
(installation plans, layout of the operating space,
intake ratios) is complete and correct.
• Also observe all regulations, rules, and legal require-
ments for working with and underneath heavy sus-
pended loads. Wear appropriate protective clothing/
equipment.
• Please also observe the applicable national accident
prevention regulations and trade association safety
provisions.
5.3.1. Maintenance work
After a storage period of more than 6 months, the
following maintenance work must be carried out
beforeinstallation:
• Rotate impeller
• Check oil level in the sealing chamber
Rotate impeller
1. Positionthepumphorizontallyonarmsurface.
Make sure that the pump cannot fall over and/or
slip.
2. Carefully and slowly reach into the hydraulics hous-
ing from below and rotate the impeller.
WARNING: sharp edges!
Sharp edges can form on the impellers and
hydraulic opening. There is a risk of injury! Wear
the necessary protective clothing, such as pro-
tective gloves.

Installation and operating instructions Wilo-Rexa PRO 19
INSTALLATION US English
Check oil level in sealing chamber
Thesealingchamberhasaholefordrainingandll-
ing the chamber.
1. Positionthepumphorizontallyonarmsurface
with the screw plug facing upward.
Make sure that the pump cannot fall over and/or
slip.
2. Unscrew the screw plug (see Fig. 8).
3. Theoilshouldreachuptoabout0.4in(1cm)below
the hole for the screw plug.
4. If there is not enough oil in the sealing chamber, top
itup.Todoso,followtheinstructionsunder“Oil
change”inthe“Maintenanceandrepair”section.
5. Clean the screw plug, replace the seal ring if neces-
sary, and screw it back in.
5.3.2. Stationary wet well installation
A guide system must be installed for wet well instal-
lation. This must be ordered from the manufacturer
separately. The pipe system on the pressure side is
connected to this.
The connected pipe system must be self-sup-
porting, i.e. it must not be supported by the guide
system.
The operating space must be laid out so that the
guide system can be installed and operated without
difculty.
If the motor emerges from immersion during opera-
tion, the following operating parameters must be
strictlyobserved:
• The max. uid temperature and ambient tempera-
ture is 104°F (40°C).
• Specicationsfor“non-immersedoperatingmode”
Fig. 2.: Wet well installation
1 Guide system 6 Lifting gear
2 Non-return valve 7a Min. water level for im-
mersed operation
3 Gate valve 7b Min. water level for non-
immersed operation*
4 Pipe elbow 8 Impact protection plate
5
Guide pipe
(to be provided by the
customer)
9 Inlet
A Minimum distances in parallel operation
B Minimum distances in alternating operation
Clearance “A”
DN 50 12 in (308 mm)
DN 65 15 in (385 mm)
DN 80 24 in (615 mm)
DN 100 24 in (615 mm)
Work steps
1. Installationoftheguidesystem:about3-6h
(see the installation and operating instructions for
the guide system).
2. Preparing the pump for operation on a guide sys-
tem:about1-3h
(see the installation and operating instructions for
the guide system).
3. Installingthepump:about3-5h
• Checkthattheguidesystemisrmlyxedand
functions properly.
• Secure the lifting equipment to the pump with
the shackle, lift the pump, and then lower slowly
onto the guide pipes in the operating space.
• Hold the power supply cables slightly taut when
lowering.
• When the pump is connected to the guide
system, ensure that the power supply cables are
secured adequately to prevent them falling down
and or being damaged.
• Have the electrical connections made by a quali-
edelectrician.
• The pressure connection is sealed by its own
weight.
4. Install optional accessories, such as dry-running
protection or level controls.
5. Startingupthepump:about2-4h
• Asdescribedinthe“Commissioning”section
• Fornewinstallation:Floodtheoperatingspace
• Vent the pressure pipe.
5.3.3. Portable wet well installation
In this installation type, the pump has to be
equipped with a pump foot (available as an option).
This is attached to the suction port and ensures the
minimum ground clearance and a secure footing
if placed on a solid bearing surface. In this ver-
sion, the pump can be positioned anywhere in the
operating space. If used in an operating space with
a soft bearing surface, a hard base must be used to
prevent sinking. A pressure hose is connected on
the pressure side.
If operated for longer periods of time in this instal-
lationtype,thepumpmustbefastenedtotheoor.
This prevents vibration and ensures quiet and low-
wearing running.
If the motor emerges from immersion during opera-
tion, the following operating parameters must be
strictlyobserved:
• The max. uid temperature and ambient tempera-
ture is 104°F (40°C).
• Specicationsfor“non-immersedoperatingmode”
CAUTION: beware of burns!
The housing parts can heat up to well above
104°F (40°C). There is a risk of burns! After
switching it off, let the pump cool down to am-
bient temperature.

20 WILO SE 2015-07 V05 Letter
US English INSTALLATION
Fig. 3.: Portable installation
1 Lifting gear 5 Storzhosecoupling
2 Pump foot 6 Pressure hose
3
Pipe elbow for hose
connectionorStorzpipe
coupling
7a Min. water level for im-
mersed operation
4Storzpipecoupling 7b Min. water level for non-
immersed operation
Work steps
1. Preparingpumps:about1h
• Install the pump foot on the suction connection.
• Install the pipe elbow on the pressure connection.
• Fasten the pressure hose to the pipe elbow with
a hose clip.
Alternatively,aStorzpipecouplingcanbe
installedonthepipeelbowandaStorzhosecou-
pling can be installed on the pressure hose.
2. Installingthepump:about1-2h
• Position pump in installation location. If neces-
sary, secure lifting equipment to the pump with
a shackle, lift the pump, and then lower to the
intended location (sump, pit).
• Check that the pump is vertical and on a solid
bearing surface. Avoid sinking.
• Route the power supply cable so it cannot be
damaged.
• Have the electrical connections made by a quali-
edelectrician.
• Route the pressure hose so that it is not damaged
andfastenitatcertainpoints(e.g.outow).
DANGER: risk of pressure hose becoming sepa-
rated!
Uncontrolled separation or movement of the
pressure hose can result in injuries. Secure the
pressure hose appropriately. Prevent buckling of
the pressure hose.
3. Startingupthepump:about1-3h
• Asdescribedinthe“Commissioning”section
5.3.4. Stationary dry well installation
In this installation type, the operating space is di-
vided into a collector tank and a machine room. The
uidiscollectedinthecollectortankandthepump
is installed in the machine room. The operating
space must be prepared according to the manufac-
turer'scongurationorplanningguide.Thepump
is connected to the pipe system on the suction and
pressuresidesatthespeciedpointinthemachine
room.Thepumpitselfisnotimmersedintheuid.
The pipe system on the suction and pressure sides
must be self-supporting, i.e. it may not be sup-
ported by the pump. In addition, the pump connec-
tion to the pipe system must be free of stress and
vibrations. We therefore recommend using elastic
connection pieces (expansion joints).
The following operating parameters must be ob-
served for dry well installation.
• The max. uid temperature and ambient tempera-
ture is 104°F (40°C).
• Specicationsfor“non-immersedoperatingmode”
The pump is not self-priming, so the hydraulics
housing must be completely lled with the uid.
The minimum level in the collector tank must
be at the same height as the upper edge of the
hydraulics housing.
CAUTION: beware of burns!
The housing parts can heat up to well above
104°F (40°C). There is a risk of burns! After
switching it off, let the pump cool down to am-
bient temperature.
Fig. 4.: Stationary dry well installation
1 Collector tank 5 Expansion joint
2 Machine room 6 Pump
3 Gate valve 7 Min. water level
4 Non-return valve 8 Dry-running protection
Work steps
1. Installingthepump:about3-5h
• Checkthatthepipesystemissecuredrmly.
• Secure lifting equipment to the pump with a
shackle, lift the pump, and then lower slowly on
to the pipe system.
• When lowering the pump, be mindful of the
power supply cables.
• When the pump is resting on the piping, fasten
the pump to the pipe system on the suction and
pressure sides.
• Route the power supply cables in accordance with
local requirements.
• Have the electrical connections made by a quali-
edelectrician.
2. Install optional accessories, such as dry-running
protection or level controls.
3. Startingupthepump:about2-4h
• Asdescribedinthe“Commissioning”section
• Open slide valves on suction and pressure sides.
• Vent the pressure pipe.
5.3.5. Level control
Levelcontrolcanbeusedtodetectuidlevelsand
to switch the pump on and off automatically. The
uidlevelscanberecordedusingoatswitches,
pressure and ultrasound measurements, or elec-
trodes.
Notethefollowing:
• Whenusingoatswitches,ensurethattheycan
move freely in the operating area.
• The water level must not fall below the minimum.

Installation and operating instructions Wilo-Rexa PRO 21
INSTALLATION US English
• The maximum switching frequency must not be
exceeded.
• Iftheuidlevelsuctuatestrongly,thenlevel
control should be implemented using two measur-
ing points as standard. This allows larger intervals
before control is triggered.
Installation
For correct installation, please see the installation
and operation instructions for the level control
device.
Observe the information on the maximum switch-
ing frequency and the minimum water level!
5.4. Dry-running protection
To ensure the necessary cooling, the pump may
need to be immersed when in operation, depend-
ing on the operating mode. In addition, it is also
important to ensure that no air enters the hydraulics
housing.
The pump must therefore always be immersed in
theuiduptothetopedgeofthehydraulichousing
or, if applicable, up to the top edge of the motor
housing. For optimum operational reliability, we rec-
ommend installing a dry-running protection system.
Thiscanbeimplementedusingoatswitchesor
electrodes.Theoatswitchorelectrodeisxedin
the sump and switches off the pump when the wa-
ter level falls below the minimum coverage level. If
thedry-runningprotectiononlyincludesoneoater
orelectrodeandtheuidlevelsdeviatesignicant-
ly, then the pump may switch on and off constantly.
This can result in the maximum number of motor
activations (switching cycles) being exceeded.
5.4.1. Remedies for avoiding excessive switching cycles
• Manual reset
The motor is switched off when the water level falls
below the minimum coverage level and switched
backonwhenasufcientwaterlevelisreached.
• Separate reactivation point
Asecondswitchingpoint(additionaloateror
electrode)isusedtoobtainasufcientdifference
between the activation and deactivation points.
This prevents constant switching. This function can
be implemented using a level control relay.
5.5. Electrical connection
ELECTROCUTION hazard!
Incorrect electrical connections can cause fatal
electric shocks. Electrical connections may only
be carried out by a qualied electrician ap-
proved by the local energy supply company, in
accordance with locally applicable regulations.
DANGER: from incorrect connection!
With Ex-rated pumps, the power supply cable
must be connected outside the potentially
explosive area, or inside a housing with an ap-
proved level of ignition protection. Non-obser-
vance may lead to fatal injury due to explosion!
• Always have the connection carried out by a
qualied electrician.
• Note the additional information about this in the
appendix.
• The line power current and voltage must be as
stated on the rating plate.
• Connect the power supply cable in accordance with
the applicable standards and regulations and ac-
cording to the wire assignment.
• Any monitoring equipment to be used, e.g. for
thermal motor monitoring, must be connected and
tested to ensure that it is working properly.
• For three-phase AC motors, a clockwise phase
sequence must be present.
• Ground the pump properly.
Pumps that are permanently installed must be
grounded in compliance with nationally applicable
standards. If a separate grounding conductor is
available, it must be connected to the marked hole
or ground terminal (;) using a suitable screw, nut,
toothlockwasher,andatwasher.Thecrosssec-
tion of the cable for the grounding conductor con-
nection must comply with the local regulations.
• A motor protection switch must be used for mo-
tors with a free cable end. We recommend using a
residual current device (RCD).
• Switchgear must be purchased as accessories.
5.5.1. Line-side fuse protection
The backup fuse required must be rated according
to the starting current. Refer to the rating plate for
the starting current.
Only slow-blow fuses or K-type circuit breakers can
be used as the backup fuse.
5.5.2. Checking the insulation resistance and monitoring
devices before commissioning
Ifthevaluesmeasureddeviatefromthespecica-
tions, moisture may have penetrated into the motor
or the power supply cable or the monitoring unit
may be defective. Do not connect the pump, and
consult Wilo customer service.
Insulation resistance of the motor winding
Before connecting the power supply cable, the
insulation resistance must be tested. This can be
measured with an insulation tester (measuring volt-
age=1000V):
• Oninitialcommissioning:insulationresistance
maynotbelessthan20MΩ.

22 WILO SE 2015-07 V05 Letter
US English INSTALLATION
• Forfurthermeasurements:valuemustbelarger
than2MΩ.
For motors with an integrated capacitor, the
windings must be short circuited before checking.
Temperature sensor and pencil electrode (avail-
able as an option) for sealing chamber control
Before connecting the monitoring devices, these
must be checked with an ohmmeter. The following
valuesmustbecompliedwith:
• Bimetallicstrip:Value=“0”passage
• PTCthermistorsensor:APTCthermistorsensor
hasacoldresistanceofbetween20and100Ω.
If there are 3 sensors in series, this results in a
valueof60to300 Ω.
If there are 4 sensors in series, this results in a
valueof80to400 Ω.
• Pencilelectrode:Thisvaluemustapproachinn-
ity. If the value is low, there is water in the oil. Also
observe the instructions of the optional evalua-
tion relay.
5.5.3. Single phase AC motor
The single-phase version has a capacitor switchgear
(start and operating capacitor) and free cable ends.
The connection to line power is made in the switch-
gear.
Electrical connections may only be made by a
qualied electrician!
Ifthepumpisttedwithaplug,itisconnected
to the power supply by inserting the plug into a
socket.
Fig. 5.: Connection diagram
7-wire connection cable
Wire number Terminal Designation
120/21 Temperature monitor for winding
2
3 L U1/Z1
4 N U2
5 Z2 Connection for start and operating
capacitor
6 DK Leakage detection for motor com-
partment
green/yellow
(gn-ye) PE Ground
Connection WITHOUT capacitor switchgear
If the unit is connected without a capacitor switch-
gear, the two capacitors have to be present in the
switchgear.
Thefollowingcapacitorsizesneedtobeusedhere:
• Startcapacitor:70µF,440V,60Hz
• Operatingcapacitor:35µF,440V,60Hz
5.5.4. Three phase AC motor
The three phase version is supplied with bare cable
ends. The connection to line power is made in the
switchgear.
Electrical connections may only be made by a
qualied electrician!
Ifthepumpisttedwithaplug,itisconnected
to the power supply by inserting the plug into a
socket.
The following wire assignments apply to the stan-
dard pumps in the PRO series.
Fig. 6.: Connection diagram: Direct starting P13 motor
7-wire connection cable
Wire number Terminal Designation
110/11
20/21 Temperature monitor for winding
2
3 U
Line power4 V
5 W
6 DK Leakage detection for motor com-
partment
Green/yellow PE Ground
Fig. 7.: Connection diagram: Direct starting P17 motor
7-wire connection cable
Wire number Terminal Designation
1 10, 20 Temperaturemonitoring:Center
terminal
2 11, 21 Temperaturemonitoring:High
temperature
3 U
Line power4 V
5 W
6 12, 22 Temperaturemonitoring:Low
temperature
Green/yellow PE Ground
Fig. 8.: Connection diagram: Star-delta starting P17 motor
10-wire connection cable
Wire number Terminal Designation
1 U1
Line power
2 U2
3 V1
4 V2
5 W1
6 W2

Installation and operating instructions Wilo-Rexa PRO 23
INSTALLATION US English
7 10, 20 Temperaturemonitoring:Center
terminal
8 11, 21 Temperaturemonitoring:High
temperature
9 12, 22 Temperaturemonitoring:Low
temperature
Green/yellow PE Ground
The wire assignment for freely congured pumps
in the PRO series can be found in the connection
diagram enclosed with this manual.
5.5.5. Connecting the monitoring devices
RISK of fatal injury due to explosion!
If the monitoring devices are not connected
correctly, there is a risk of fatal injury due to
explosion if used in potentially explosive areas!
Always have the connection carried out by an
electrician. If the pump is used in potentially
explosive areas:
• The temperature monitor must be connected via
an evaluation relay. We recommend the “CM-
MSS” relay for this. The threshold comes preset.
• Deactivation by the temperature limiter must be
conducted with an anti-reactivation mechanism,
meaning that reactivation should only be pos-
sible if the “release button” has been pressed
manually!
• The pencil electrode for sealing chamber control
must be connected via an intrinsically safe cir-
cuit with an evaluation relay. We recommend the
“XR-42x” relay for this. The threshold is 30kΩ.
• Also note the additional information in the ap-
pendix!
All monitoring devices must be connected at all
times.
Motor temperature monitor
The pump is equipped as standard with a tempera-
ture monitor with a bimetallic strip.
• P13motor:
The motor is equipped as standard with a tem-
perature limit (single-circuit temperature moni-
toring). When the threshold is reached, the motor
must switch off.
Ifatemperaturecontrollerandlimiteraretted
(two-circuittemperaturemonitoring;canbe
orderedasanoption),a“preliminarywarning”can
takeplaceatthelowvalueand“deactivation”
must take place at the higher value.
• P17motor:
The motor is equipped as standard with a tem-
perature control and limit function (2-circuit
temperature monitoring). When the low threshold
is reached, a "preliminary warning" may be issued,
when the high threshold is reached, the motor
must switch off.
• When used outside potentially explosive areas, the
bimetallic strips can be connected directly in the
switchgear.
Connectionvalues:max.250V(AC),2.5A,cosφ=1
• PTC sensors (optionally available) must be connect-
edviaanevaluationrelay.Werecommendthe“CM-
MSS” relay for this. The threshold comes preset.
For this reason, no warranty claims can be accepted
for any damage to the winding resulting from un-
suitable motor monitoring.
Motor compartment monitoring (P13 motor only)
• The motor compartment monitor must be con-
nected via an evaluation relay. We recommend the
“NIV101/A”relayforthis.Thethresholdis30kΩ.
When the threshold is reached, the unit must switch
off.
Connecting the pencil electrode (available as an
option) for sealing chamber control
• When used outside potentially explosive areas,
the pencil electrode can be connected via the
NIV101/Arelay.Thethresholdis30kΩ.Whenthe
threshold is reached, a warning must be given or the
unit switched off.
CAUTION!
If there is only a warning, the pump could be ir-
reparably damaged by water ingress. We recom-
mend always switching the pump off!
5.6. Motor protection and activation types
5.6.1. Motor protection
The minimum requirement for motors with a free
cable end is a thermal relay/motor protection switch
with temperature compensation, differential trig-
gering, and an anti-reactivation device, in accor-
dance with national regulations.
If the pump is connected to electrical systems
in which faults frequently occur, we recommend
installing additional protective devices, to be pro-
vided by the customer (e.g. relays for overvoltage,
undervoltage,orphasefailure;lightningprotection,
etc.). We also recommend installing a residual cur-
rent device (RCD).
Local and national regulations must be observed
when connecting the pump.
5.6.2. Activation types
Direct activation
At full load, the motor protection should be set
to the rated current shown on the rating plate. At
partial load, we recommend that the motor protec-
tion be set 5% above the current measured at the
duty point.