Wilo Rexa UNI User manual

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Wilo-Rexa UNI
6082109 • Ed.01/2017-03
en Installation and operating instructions

en
Installation and operating instructions Wilo-Rexa UNI 3
Table of contents
1 General information ................................................................................................................................................................. 5
1.1 About these instructions ..................................................................................................................................................................................5
1.2 Copyright ............................................................................................................................................................................................................5
1.3 Subject to change..............................................................................................................................................................................................5
1.4 Warranty..............................................................................................................................................................................................................5
2 Safety......................................................................................................................................................................................... 5
2.1 Identification of safety instructions................................................................................................................................................................5
2.2 Personnel qualifications....................................................................................................................................................................................6
2.3 Electrical work ....................................................................................................................................................................................................6
2.4 Monitoring devices ............................................................................................................................................................................................7
2.5 Use in fluids hazardous to health ....................................................................................................................................................................7
2.6 Transport.............................................................................................................................................................................................................7
2.7 Installing/dismantling........................................................................................................................................................................................7
2.8 During operation ................................................................................................................................................................................................7
2.9 Maintenance tasks.............................................................................................................................................................................................8
2.10 Operating fluid ...................................................................................................................................................................................................8
2.11 Operator responsibilities...................................................................................................................................................................................8
3 Application/use......................................................................................................................................................................... 8
3.1 Intended use.......................................................................................................................................................................................................8
3.2 Improper use.......................................................................................................................................................................................................9
4 Product description.................................................................................................................................................................. 9
4.1 Design..................................................................................................................................................................................................................9
4.2 Monitoring devices ......................................................................................................................................................................................... 10
4.3 Operating modes............................................................................................................................................................................................. 10
4.4 Operation with frequency converter............................................................................................................................................................ 10
4.5 Operation in an explosive atmosphere ........................................................................................................................................................ 10
4.6 Technical data .................................................................................................................................................................................................10
4.7 Type key........................................................................................................................................................................................................... 10
4.8 Scope of delivery............................................................................................................................................................................................. 11
4.9 Accessories ...................................................................................................................................................................................................... 11
5 Transportation and storage................................................................................................................................................... 11
5.1 Delivery............................................................................................................................................................................................................. 11
5.2 Transport.......................................................................................................................................................................................................... 11
5.3 Storage ............................................................................................................................................................................................................. 12
6 Installation and electrical connection .................................................................................................................................. 12
6.1 Personnel qualifications................................................................................................................................................................................. 12
6.2 Installation types............................................................................................................................................................................................. 12
6.3 Operator responsibilities................................................................................................................................................................................ 13
6.4 Installation ....................................................................................................................................................................................................... 13
6.5 Electrical connection...................................................................................................................................................................................... 17
7 Commissioning........................................................................................................................................................................ 19
7.1 Personnel qualifications................................................................................................................................................................................. 19

en
4 WILO SE 2017-03
7.2 Operator responsibilities................................................................................................................................................................................ 19
7.3 Direction of rotation check (for three-phase current motors only)........................................................................................................ 19
7.4 Before switching on........................................................................................................................................................................................ 19
7.5 Switch on and off............................................................................................................................................................................................ 19
7.6 During operation ............................................................................................................................................................................................. 20
8 Decommissioning/dismantling.............................................................................................................................................. 20
8.1 Personnel qualifications................................................................................................................................................................................. 20
8.2 Operator responsibilities................................................................................................................................................................................ 21
8.3 Decommissioning............................................................................................................................................................................................ 21
8.4 Removal............................................................................................................................................................................................................ 21
9 Maintenance and repair.......................................................................................................................................................... 23
9.1 Personnel qualifications................................................................................................................................................................................. 23
9.2 Operator responsibilities................................................................................................................................................................................ 23
9.3 Operating fluid ................................................................................................................................................................................................ 23
9.4 Maintenance intervals.................................................................................................................................................................................... 23
9.5 Maintenance measures .................................................................................................................................................................................. 24
10 Faults, causes and remedies .................................................................................................................................................. 25
11 Spare parts............................................................................................................................................................................... 27
12 Disposal.................................................................................................................................................................................... 27
12.1 Oils and lubricants........................................................................................................................................................................................... 27
12.2 Protective clothing .........................................................................................................................................................................................27
12.3 Information on the collection of used electrical and electronic products.............................................................................................. 27

General information en
Installation and operating instructions Wilo-Rexa UNI 5
1 General information
1.1 About these instructions
These installation and operating instructions are an in-
tegral part of the product. Read these instructions be-
fore commencing work and keep them in an accessible
place at all times. Strict adherence to these instructions
is a precondition for the intended use and correct oper-
ation of the product. All information and markings on
the product must be observed.
The language of the original operating instructions is
German. All other languages of these instructions are
translations of the original operating instructions.
1.2 Copyright
These installation and operating instructions have been
copyrighted by the manufacturer. Contents, of
whatever type, which may not be reproduced or dis-
tributed, or used for purposes of competition and
shared with others.
1.3 Subject to change
The manufacturer reserves the right to make technical
modifications to the device or individual components.
The illustrations used may differ from the original and
are intended as an example representation of the
device.
1.4 Warranty
The specifications in the current “General Terms and
Conditions” apply to the warranty and the warranty
period. These can be found at www.wilo.com/legal
Any deviations must be contractually agreed and shall
then be given priority.
Claim to warranty
If the following points are complied with, the manufac-
turer is obligated to rectify every qualitative or con-
structive flaw:
▪The defects are reported in writing to the manufacturer
within the warranty period.
▪Application according to intended use.
▪All monitoring devices are connected and tested before
commissioning.
Exclusion from liability
Exclusion from liability excludes all liability for personal
injury, material damage or financial losses. This exclu-
sion ensues as soon as one of the following applies:
▪Inadequate configuration due to inadequate or incor-
rect instructions by the operator or the client
▪Non-compliance with installation and operating in-
structions
▪Improper use
▪Incorrect storage or transport
▪Incorrect installation or dismantling
▪Insufficient maintenance
▪Unauthorised repairs
▪Inadequate construction site
▪Chemical, electrical or electro-chemical influences
▪Wear
2 Safety
This chapter contains basic information which must be
adhered to during the individual phases of the life
cycle. Failure to follow the installation and operating
instructions will result in injuries to persons, damage to
the environment and the device and result in the loss of
any claims for damages. Failure to follow the instruc-
tions can result in the following risks:
▪Danger to persons due to electrical, mechanical and
bacteriological factors as well as electromagnetic fields
▪Environmental risks due to leakage of hazardous sub-
stances
▪Property damage
▪Failure of important functions of the product
Additionally, the instructions and safety instructions
in the other chapters must be observed!
2.1 Identification of safety instructions
These installation and operating instructions set out
safety instructions for preventing personal injury and
damage to property. These safety instructions are
shown differently:
▪Safety instructions relating to personal injury start with
a signal word, are preceded by a corresponding sym-
bol and are shaded in grey.
DANGER
Type and source of the danger!
Consequences of the danger and instructions for
avoidance.
▪Safety instructions for property damage start with a
signal and are displayed without a symbol.
CAUTION
Type and source of the danger!
Consequences or information.

en Safety
6 WILO SE 2017-03
Signal words
▪DANGER!
Failure to observe the safety instructions will result in
serious injuries or death!
▪WARNING!
Failure to follow the instructions can lead to (serious)
injuries!
▪CAUTION!
Failure to follow the instructions can lead to property
damage and a possible total loss.
▪NOTE!
Useful information on handling the product.
Symbols
These instructions use the following symbols:
Danger of electric voltage
Danger of bacterial infection
Danger of explosion
General warning symbols
Warning of crushing
Warning of cutting injuries
Warning of hot surfaces
Warning of high pressure
Warning of suspended loads
Personal protective equipment: Wear a safety hel-
met
Personal protective equipment: Wear foot protec-
tion
Personal protective equipment: Wear hand protec-
tion
Personal protective equipment: Wear mouth protec-
tion
Personal protective equipment: Wear safety goggles
Autonomous work prohibited! A second person
must be present.
Useful information
Markups
‡Prerequisite
1. Work step/list
⇒ Information/instructions
▶ Result
2.2 Personnel qualifications
Personnel must:
▪Be instructed in the locally applicable accident preven-
tion regulations.
▪Have read and understood the installation and operat-
ing instructions.
Personnel must have the following qualifications:
▪Electrical work: Electrical work must be carried out by a
qualified electrician (in accordance with EN50110-1).
▪Installation-/dismantling: The technician must be
trained in the use of the necessary tools and mounting
materials for the relevant construction site.
▪Maintenance tasks: The technician must be familiar
with the use of operating fluids and their disposal. In
addition, the technician must have basic knowledge of
mechanical engineering.
Definition of “qualified electrician”
A qualified electrician is a person with appropriate
technical education, knowledge and experience who
can identify and prevent electrical hazards.
2.3 Electrical work
▪A qualified electrician must carry out the electrical
work.
▪When connecting to the mains, comply with the locally
applicable laws and regulations of the local energy sup-
ply company.
▪Before commencing work, disconnect the device from
the mains and secure it against being switched on again
without authorisation.
▪Personnel is trained on the execution of the electrical
connection and the options for switching off the
device.
▪Comply with the technical specifications contained in
these installation and operating instructions and on the
rating plate.
▪Earth the device.
▪Observe the manufacturer’s specifications when con-
necting to electrical switching systems.
▪Comply with the specifications on electro-magnetic
compatibility when connecting electronic start-up
controllers (e.g. soft starter or frequency converter). If
required, take into account special measures (e.g. shiel-
ded cables, filters etc.).

Safety en
Installation and operating instructions Wilo-Rexa UNI 7
▪Replace defective power supply cables immediately.
Contact customer service.
2.4 Monitoring devices
The following monitoring equipment must be provided
on-site:
Circuit breaker
The size of the circuit breakers conforms to the rated
current of the pump. The switching characteristics
should comply with group B or C. Observe local regula-
tions.
Motor protection switch
Make provision for an on-site motor protection switch
for devices without a plug! The minimum requirement
is a thermal relay/motor protection switch with tem-
perature compensation, differential triggering and
anti-reactivation device in accordance with the local
regulations. In case of sensitive mains, make provision
for the installation on-site of other protective equip-
ment (e.g. overvoltage, undervoltage or phase failure
relay, etc.).
Residual-current device (RCD)
Comply with the regulations of the local energy supply
company! The use of a residual-current device is re-
commended.
If persons come into contact with the device and con-
ductive fluids, secure the connection with a residual-
current device (RCD).
2.5 Use in fluids hazardous to health
There is a danger of bacterial infection when using the
device in fluids hazardous to health! Thoroughly clean
and disinfect the device after dismantling and prior to
further use. The operator must ensure the following:
▪The following protective equipment is provided and
worn when cleaning the device:
– Closed safety goggles
– Breathing mask
– Protective gloves
▪All persons are informed about the fluid, the associated
danger and its correct handling!
2.6 Transport
▪The following protective equipment must be worn:
– Safety shoes
– Safety helmet (when using lifting equipment)
▪Always hold the handle to transport the device. Never
pull the power supply cable!
▪Only use legally specified and approved lifting gear.
▪Select the lifting gear based on the available conditions
(weather, attachment point, load, etc.).
▪Always attach the lifting gear to the attachment points
(handle or lifting eyelet).
▪The stability of the lifting equipment must be ensured
during operation.
▪When using lifting equipment, a second person must be
present to coordinate the procedure if required (e.g. if
the operator’s field of vision is blocked).
▪Persons are not permitted to stand beneath suspended
loads. Do not lift loads above workplaces, on which
people are present.
2.7 Installing/dismantling
▪Wear the following protective equipment:
– Safety shoes
– Safety gloves against cuts
– Safety helmet (when using lifting equipment)
▪Locally applicable laws and regulations for work safety
and accident prevention must be complied with.
▪Disconnect the device from the mains and secure it
against being switched on again without authorisation.
▪All rotating parts must be at a standstill.
▪Provide adequate aeration in closed rooms.
▪When working in chambers and closed spaces, a second
person must be present for safety reasons.
▪Take immediate countermeasures if there is a build-up
of toxic or suffocating gases!
▪Clean the device thoroughly. Disinfect devices that are
used in fluids hazardous to health!
▪Make sure that there is no risk of explosion when carry-
ing out any type of welding work or work with electrical
devices.
2.8 During operation
▪Wear the following protective equipment:
– Safety shoes
– Ear protection (in accordance with the notice of the
work regulations)
▪Work area of the device is not an recreational area. No
persons are allowed in the work area during operation.
▪The operator must immediately report any faults or ir-
regularities to their line manager.
▪If safety-endangering defects occur, the operator must
immediately deactivate the device:
– Malfunction of the safety and monitoring equipment
– Damage to the housing parts
– Damage to the electrical equipment
▪Never reach into the suction port. The rotating parts
can crush and sever limbs.

en Application/use
8 WILO SE 2017-03
▪If the motor emerges during operation, the motor
housing can reach temperatures in excess of 40°C.
▪Open all gate valves in the piping on the suction and
pressure side.
▪Ensure minimum water submersion through dry-run-
ning protection.
▪Under normal operating conditions, the sound pressure
level of the device is below 85dB(A). However, the ac-
tual sound-pressure level depends on several factors:
– Installation depth
– Installation
– Fixation of accessories and pipe
– Duty point
– Immersion depth
▪If the device is operated under normal operating condi-
tions, the operator must measure the sound pressure.
Ear protection must be worn for sound pressure level of
85dB(A) and above and this must be noted in the work
regulations!
2.9 Maintenance tasks
▪Wear the following protective equipment:
– Closed safety goggles
– Safety shoes
– Safety gloves against cuts
▪Always carry out maintenance tasks outside the oper-
ating space/installation site.
▪Only carry out maintenance tasks mentioned in this in-
stallation and operating instructions.
▪Only original parts from the manufacturer may be used
for maintenance and repairs. Use of parts other than
the original parts releases the manufacturer from any
liability.
▪Collect any leakage of fluid and operating fluid immedi-
ately and dispose of it according to the locally applic-
able guidelines.
▪Store tools at the designated locations.
▪After completing work, reattach all safety and monitor-
ing devices and check that they function properly.
Changing operating fluid
In case of a defect, a pressure of several bar can build
up in the motor! This pressure escapes when the screw
plugs are opened. If screw plugs are opened without
due caution, they can be ejected at high speed! To
avoid injuries, observe the following instructions:
▪Adhere to the prescribed sequence of work steps.
▪Unscrew the screw plugs slowly, but never unscrew
them completely. As soon as the pressure escapes
(audible whistling or hissing of air), stop turning the
screw plug any further.
WARNING!Hot operating fluid can also spray out
when the pressure is escaping. This can result in
scalding! To avoid injuries, allow the motor to cool
down to the ambient temperature before carrying
out any work!
▪When the pressure has completely dissipated, fully un-
screw the screw plug.
2.10 Operating fluid
In the sealing chamber, the motor is filled with white
oil. Operating fluid must be replaced during regular
maintenance work and disposed off according to the
local guidelines.
2.11 Operator responsibilities
▪Installation and operating instructions must be in a lan-
guage which the personnel can understand.
▪Make sure that the personnel is relevantly trained for
the specified work.
▪Provide the necessary protective equipment and make
sure that the personnel wears it.
▪Safety and information signs mounted on the device
must be always legible.
▪Train the personnel pertaining to the functioning of the
system.
▪Eliminate risk from electrical current.
▪Equip hazardous components inside the system with an
on-site guard.
▪Identify and cordon off the work area.
▪To ensure safe working practice, define the responsib-
ilities of the employees.
Children and persons below 16years or with reduced
physical, sensory or mental capacities or limited experi-
ence are prohibited from handling the device! A techni-
cian must supervise persons below 18years!
3 Application/use
3.1 Intended use
Submersible pumps are suitable for pumping:
▪Sewage containing faeces (in accordance with
EN12050-1)
▪Wastewater (with small amounts of sand and gravel)
▪Fluids with dry matter up to max. 8%

Product description en
Installation and operating instructions Wilo-Rexa UNI 9
3.2 Improper use
DANGER
Explosion due to pumping of explosive fluids!
Pumping of highly flammable and explosive fluids
(gasoline, kerosene, etc.) in pure form is strictly pro-
hibited. There is a risk of fatal injury due to explo-
sion! The pumps are not designed for these fluids.
DANGER
Danger due to fluids hazardous to health!
If the pump is used in fluids hazardous to health, de-
contaminate the pump after dismantling and before
carrying out any other work! There is danger to life!
Observe the specifications in the work regulations!
The operator must make sure that the personnel has
received and read the work regulations!
The submersible pumps must not be used for pumping:
▪Drinking water
▪Fluids containing hard components (such as stones,
wood, metal, etc.)
▪Fluids containing large quantities of abrasive contents
(e.g. sand, gavel)
Intended use also includes compliance with this
manual. Any other use is regarded as non-compliant
with the intended use.
4 Product description
4.1 Design
Submersible sewage pump as a submersible monobloc
unit for intermittent operation for wet well installation.
4
5
6
1
2
3
Fig.1: Overview
1 Handle/attachment point
2 Motor housing
3 Hydraulics housing
4 Pressure port
5 Pump support foot, integrated in hydraulics housing
6 Power supply cable
4.1.1 Hydraulics
Rotodynamic hydraulics with vortex impeller and hori-
zontal flange connection on the pressure side. The
screwed connection is integrated in the pressure port.
The hydraulics are not self-priming, in other words, the
fluid must flow in either automatically or with supply
pressure.
NOTICE
Combined connection for DN50 and DN65!
The RexaUNIV06 is equipped with a DN50/65
combined connection. The factory setting of the
connection is DN65. To use the pump with a DN50
connection, press the nuts in the flange inwards
onto the small hole circle. The flange can be reset to
DN65 at any time!
4.1.2 Motor
The drive versions used are single-phase current and
three-phase current surface-cooled motors. The motor
is cooled by the fluid around it. The waste heat is trans-
ferred directly to the fluid via the motor housing. The
motor may emerge during operation.
With single-phase AC motors, the operating capacitor
is integrated in the motor. The connection cable is
available in the following versions:
▪Single-phase version:
– With shockproof plug
– With a shockproof plug and fitted with a float switch
▪Three-phase version:
– With bare cable end
– With CEE plug and fitted with a float switch
4.1.3 Seal
Different designs are used for the seal to the fluid and
the motor compartment:
▪RexaUNIV05: A rotary shaft seal is used on the motor
side, a mechanical seal is used on the fluid side.
▪RexaUNIV06: A mechanical seal is used on the motor
side and the fluid side.
The sealing chamber between both seals is filled with
medical white oil.

en Product description
10 WILO SE 2017-03
4.1.4 Material
▪Pump housing: PP-GF30
▪Impeller: PP-GF30
▪Motor housing: 1.4301
▪Shaft: 1.4401
▪Seal on the fluid side: SiC/SiC
▪Seal on the motor side: NBR (V05), C/Cr (V06)
▪Seal, static: NBR
4.1.5 Fitted accessories
Float switch
In the “A” version the pump is equipped with a float
switch. Depending on the fill level, it is possible to
switch the pump on and off automatically, by using the
float switch.
Plug
In the “P” and “A” version, a shockproof plug is at-
tached for single-phase AC motors and a CEE plug is
attached for three-phase motors The plug is designed
for use in commercially available shock-proof or CEE
sockets and is not overflow-proof.
4.2 Monitoring devices
Monitoring of motor winding
The thermal motor monitoring protects the motor
winding from overheating. Temperature limiting with
bimetallic strip is fitted as standard.
Thermal motor monitoring is self-switching for single-
phase current motors. I.e. if the motor is switched off
due to overheating and then cools down, it is automat-
ically switched on again.
For three-phase current motors, the thermal motor
monitoring must be connected in the switchgear or
plug.
4.3 Operating modes
Operating mode S1: Continuous duty
The pump can operate continuously at the rated load
without exceeding the permissible temperature.
Operating mode S2: Short-time duty
The maximum operating period is specified in minutes,
e.g.S2-15. The pause must last until the machine tem-
perature no longer differs from the temperature of the
coolant by more than 2K.
Operating mode S3: Intermittent periodic duty
This operating mode defines a switching cycle in a
combination of periods of operation and standstill.
Specified value (e.g. S325%) relates to the operating
time. The switching cycle has a duration of 10min.
If two values (e.g. S325%/120s) are specified, the first
value relates to the operating time. The second value
specifies the max. period of the switching cycle.
4.4 Operation with frequency converter
Operation on the frequency converter is not permitted.
4.5 Operation in an explosive atmosphere
Operation in an explosive atmosphere is not permitted.
4.6 Technical data
General
Mains connection [U/f] See rating plate
Power consumption [P1] See rating plate
Rated power [P2] See rating plate
Maximum delivery head
[H]
See rating plate
Max. volume flow [Q] See rating plate
Activation type [AT] See rating plate
Fluid temperature [t] 3...40 °C
Protection class IP68
Insulation class [Cl.] F
Speed [n] See rating plate
Max. switching fre-
quency
30/h
Max. immersion depth
[8]
See rating plate
Cable length (standard
version)
10 m
Explosion protection -
Operating modes
Immersed [OTs] S1
Non-immersed [OTe] S2-15, S3 10%*
Pressure connection
UNIV05... DN50, PN10
UNIV06... DN50/65, PN10
* Operating mode S325% is permitted if the necessary
motor cooling is guaranteed before the motor is
switched on again! To ensure the required cooling, the
motor must be completely immersed for at least 1min.!
4.7 Type key
Example: Wilo-Rexa UNI V05/T06-540/P
UNI Series

Transportation and storage en
Installation and operating instructions Wilo-Rexa UNI 11
Example: Wilo-Rexa UNI V05/T06-540/P
V Impeller= vortex impeller
05 Nominal diameter of pressure connection
T Mains connection version: M=1~, T=3~
06 /10=Rated power P2 in kW
5 Frequency mains connection: 5=50Hz, 6=60Hz
40 Code for rated voltage
P
Additional electrical equipment:
without= with free cable end
A= with float switch and plug
P= with plug
4.8 Scope of delivery
▪Pump with 10m cable
▪Single-phase version with
– Shockproof plug
– Float switch and shockproof plug
▪Three-phase version with
– Bare cable end
– Float switch and CEE plug
▪Installation and operating instructions
4.9 Accessories
▪Cable lengths in fixed length increments of 10m to
max. 30m in the single-phase current version or max.
50m in the three-phase version
▪Suspension unit
▪Level control devices
▪Fixation accessories and chains
▪Switchgear, relays and plugs
5 Transportation and storage
5.1 Delivery
After receiving the shipment, this must be checked im-
mediately for defects (damage, completeness). Defects
must be noted on the freight documentation! Further-
more, defects must be notified to the transport com-
pany or the manufacturer immediately on the day of
receipt of shipment. Subsequently notified defects can
no longer be asserted.
5.2 Transport
WARNING
Standing beneath suspended loads!
Never allow anyone to stand under suspended loads!
Danger of (serious) injuries caused by falling parts.
Loads may not be carried over work places where
people are present!
WARNING
Head and foot injuries due to lack of protect-
ive equipment!
Danger of (serious) injuries during work. Wear the
following protective equipment:
• Safety shoes
• Safety helmet must be used if lifting equipment
are used!
NOTICE
Only use lifting equipment in a technically
sound condition!
Only use lifting equipment in a technically sound
condition for lifting, lowering and transporting the
pump. Ensure that the pump does not become
jammed during lifting and lowering. Do not exceed
the max. permissible bearing capacity of the lifting
equipment!
CAUTION
Soaked packaging may tear!
As a result, the device may fall on the ground unpro-
tected and may be damaged. Soaked packaging
must be lifted carefully and replaced immediately!
Only remove the outer packaging at the place of util-
isation to ensure that the pump is not damaged during
transport. Use tear-proof plastic sacks of sufficient size
to package used pumps for transport in a leak-proof
manner.
The following points must also be observed:

en Installation and electrical connection
12 WILO SE 2017-03
Fig.2: Attachment point
▪Adhere to the applicable national safety regulations.
▪Use legally specified and approved lifting gear.
▪Select the lifting gear based on the existing conditions
(weather, attachment point, load, etc.).
▪Only attach the lifting gear to the attachment point. Fix
with a shackle.
▪Use lifting equipment with sufficient bearing capacity.
▪The stability of the lifting equipment must be ensured
during operation.
▪When using lifting equipment, a second person must be
present to coordinate the procedure if required (e.g. if
the operator’s field of vision is blocked).
5.3 Storage
DANGER
Danger due to fluids hazardous to health!
If the pump is used in fluids hazardous to health, de-
contaminate the pump after dismantling and before
carrying out any other work! There is danger to life!
Observe the specifications in the work regulations!
The operator must make sure that the personnel has
received and read the work regulations!
WARNING
Sharp edges on the impeller and suction port
Sharp edges can form on the impeller and suction
port. There is danger of limbs being cut-off! Pro-
tective gloves must be worn to protect from cuts.
CAUTION
Total damage due to moisture ingress
Moisture ingress in the power supply cable damages
the power supply cable and the pump! Never im-
merse the end of the power supply cable in a fluid
and firmly seal it during storage.
Newly supplied pumps can be stored for one year. Con-
tact customer service to store the pump for more than
one year.
The following must be observed for storage:
▪Securely position the pump on a firm bearing surface.
Store pumps with pump support foot in an upright pos-
ition, store pumps without pump support foot in a hori-
zontal position. Secure the pump against falling over
and slipping!
▪The max. storage temperature is -15°C to +60°C at a
max. relative humidity of 90%, non-condensing.
Frost-proof storage at a temperature of 5°C to 25°C
with relative humidity of 40% to 50% is recommen-
ded.
▪Do not store the pump in rooms in which welding work
is carried out. The resulting gases or radiation can cor-
rode the elastomer parts and coatings.
▪Seal the suction and pressure connection tightly.
▪Protect power supply cables against kinking and dam-
age.
▪Protect the pump from direct sunlight and heat. Ex-
treme heat can cause damage to the impellers and the
coating!
▪Impellers must be turned by 180° at regular intervals
(3–6months). This prevents jamming of the bearings
and renews the lubrication film of the mechanical seal.
WARNING!There is a risk of injury due to edges on
the impeller and suction port!
▪Elastomer parts and the coating are subject to natural
brittleness. Contact customer service if the pump must
be stored for more than 6months.
After storage, remove any dust and oil from the pump
and check the coating for damage. Repair damaged
coatings before further use.
6 Installation and electrical connection
6.1 Personnel qualifications
▪Electrical work: Electrical work must be carried out by a
qualified electrician (in accordance with EN50110-1).
▪Installation-/dismantling: The technician must be
trained in the use of the necessary tools and mounting
materials for the relevant construction site.
6.2 Installation types
▪Vertical stationary wet well installation with suspension
unit
▪Vertical portable wet well installation with pump sup-
port foot
The following installation types are not allowed:

Installation and electrical connection en
Installation and operating instructions Wilo-Rexa UNI 13
▪Dry well installation
▪Horizontal installation
6.3 Operator responsibilities
▪Observe locally applicable accident prevention and
safety regulations of trade associations.
▪Observe all regulations for working with heavy loads
and under suspended loads.
▪Provide protective equipment and ensure that the pro-
tective equipment is worn by personnel.
▪Observe local sewage technology regulations for the
operation of sewage systems.
▪Avoid pressure surges!
Pressure surges can occur in long discharge pipelines
with steep terrain. These pressure surges can lead to
the destruction of the pump!
▪Ensure the cooling time of the motor depending on the
operating conditions and the size of the pump cham-
ber.
▪Structural components and foundations must be of
sufficient stability in order to allow the device to be
fixed securely and functionally. The operator is re-
sponsible for the provision and suitability of the struc-
tural component/foundation!
▪Check that the available consulting documents (install-
ation plans, design of the operating space, inflow con-
ditions) are complete and correct.
6.4 Installation
DANGER
Potentially fatal danger due to dangerous
autonomous work!
Work in chambers and narrow rooms as well as work
involving risk of falling are dangerous work. Such
work may not be carried out autonomously! A
second person must be present for safety reasons.
WARNING
Hand and foot injuries due to lack of protect-
ive equipment!
Danger of (serious) injuries during work. Wear the
following protective equipment:
• Safety gloves against cuts
• Safety shoes
• Safety helmet must be used if lifting equipment
are used!
NOTICE
Only use lifting equipment in a technically
sound condition!
Only use lifting equipment in a technically sound
condition for lifting, lowering and transporting the
pump. Ensure that the pump does not become
jammed during lifting and lowering. Do not exceed
the max. permissible bearing capacity of the lifting
equipment!
NOTICE
Emerging of the motor during operation
If the motor emerges during operation, the specific-
ations for “Operating mode non-immersed” must be
complied with!
To ensure that the motor is cooled during continu-
ous duty, the motor must be immersed completely
before switching it on again!
▪Prepare operating space/installation location as follows:
– Clean, free of coarse solids
– Dry well
– Frost-free
– Decontaminated
▪Take immediate countermeasures if there is a build-up
of toxic or suffocating gases!
▪Use the handle for lifting, lowering and transporting the
pump. Never carry or drag the pump by the power sup-
ply cable!
▪It must be possible to attach lifting equipment safely.
The storage place and the operating space/installation
site must be accessible with the lifting equipment. The
set-down location must have a solid bearing surface.
▪Attach the lifting gear to the handle using a shackle.
Only use lifting gear which has been technically ap-
proved.
▪The routed power supply cables must allow safe opera-
tion. Check whether the cable cross-section and the
cable length are sufficient for the selected installation
type.
▪The corresponding IP class must be observed when us-
ing switchgear. Install the switchgear overflow-proof
and outside potentially explosive areas!
▪Avoid air intake into the fluid, use baffles or deflector
plates for the inlet. Air which has entered the system
can collect in the pipe system and lead to impermissible
operating conditions. Air pockets must be removed via
ventilation systems!

en Installation and electrical connection
14 WILO SE 2017-03
▪A dry run of the pump is prohibited! Avoid air pockets in
the hydraulics housing or in the pipe system. Ensure the
water level never falls below the minimum. The install-
ation of a dry-running protection is recommended!
6.4.1 Indications for double pump operation
If several pumps are used in an operating space, min-
imum distances between the pumps and the wall must
be complied with. Here there is a difference in the dis-
tances depending on the type of system: Alternating
operation or parallel operation.
d
A2
A1
Fig.3: Minimum distances
d Diameter hydraulics housing
A1
Minimum distance from the wall:
- alternating operation: min. 0.3×d
- parallel operation: min. 1×d
A2
Distance to discharge pipelines
- alternating operation: min. 1.5×d
- parallel operation: min. 2×d
6.4.2 Note on DN50/65 combination flange
The Rexa UNI V06... is equipped with a DN50/65 com-
bination flange. The nuts on the combination flange are
factory-set to the DN65 flange. For use with a DN50
flange, adjust the nuts at the flange. The flange can be
reset to DN65 at any time!
Fig.4: Adjust combination flange
‡No accessories mounted on flange.
‡Nut is freely accessible.
1. Push the nut inwards onto the small hole circle using a
screwdriver.
▶ The flange connection is reset to DN50.
6.4.3 Maintenance tasks
After a storage period of more than 6months, check
the oil in the sealing chamber prior to installation:
1
Fig.5: Check the oil
1 Screw plug sealing chamber
‡Pump is not installed.
‡Pump is not connected to the mains.
‡Protective equipment has been put on!
1. Place the pump horizontally on a firm surface. The
screw plug points upwards. WARNING!Risk of hands
being crushed. Ensure that the pump cannot fall over
or slip away!
2. Unscrew the screw plug.
3. Place a suitable tank to collect the operating fluid.
4. Drain the operating fluid: Rotate the pump until the
opening points downwards.
5. Check the operating fluid:
⇒ If the operating fluid is clear, reuse operating fluid.
⇒ If the operating fluid is contaminated (black), fill
with new operating fluid. Dispose of operating
fluid in accordance with the local regulations!
⇒ Notify customer service if an operating fluid con-
tains metal chips!
6. Pour in operating fluid: Rotate the pump until the
opening points upwards. Fill-in the operating fluid into
the opening.
⇒ Comply with the specifications for operating fluid
locations and quantity! When recycling the operat-
ing fluid, check the quantity and if required adjust
it!

Installation and electrical connection en
Installation and operating instructions Wilo-Rexa UNI 15
7. Clean the screw plug, replace the seal ring and screw it
back in. Max. tightening torque: 8Nm!
6.4.4 Stationary wet well installation
NOTICE
Delivery problems due to water level being
too low
The hydraulics are self-venting. As a result, smaller
air cushions are dissolved during the pumping pro-
cess. If the level of the fluid is lowered too much, the
volume flow can be interrupted. The minimum per-
missible water level must reach the upper edge of
the hydraulics housing!
The pump is installed in the fluid for the wet well in-
stallation. For this, a suspension unit must be installed
in the chamber. On the pressure side, the on-site pipe
system is connected to the suspension unit and on the
suction side to the pump. The connected pipe system
must be self-supporting. The suspension unit must not
support the pipe system!
CAUTION!If the motor emerges during operation,
observe the operating mode for non-immersed oper-
ation (S2-15, S3 10%*)!
* Operating mode S325% is permitted if the necessary
motor cooling is guaranteed before the motor is
switched on again! To ensure the required cooling, the
motor must be completely immersed for at least 1min.!
Work steps
1
5
6
S1
S2/S3
3
4
2
Fig.6: Wet well installation, stationary
1 Suspension unit
2 Non-return valve
3 Stop valve
4 Guide pipe (provided by the customer)
5 Lifting equipment
6 Attachment point for the lifting equipment
CAUTION
Damage to the pump due to incorrect install-
ation
Observe the following points during the installation
of the pump:
• Observe the max. permissible tightening torque:
15Nm (V05) or 25Nm (V06)
• Do not insert an additional gasket between the
flange and the accessories! A gasket is mounted
on the pump flange!
• Only use accessories with a flange shape in ac-
cordance with EN1092-2, type A. The use of
other flange shapes is not permitted!
‡Operating space/installation location is prepared for the
installation.
‡Suspension unit and pipe system were installed.
‡Pump is prepared for operation on the suspension unit.
1. Use a shackle to attach the lifting equipment to the at-
tachment point of the pump.
2. Lift the pump, swivel it above the chamber opening and
slowly lower the guide claw onto the guide pipe.
3. Lower the pump until it sets on the suspension unit and
is connected automatically. CAUTION!Hold the power
supply cables slightly taut when lowering the pump!
4. Loosen the lifting equipment from the lifting gear and
secure it at the chamber outlet against falling.
5. Have the power supply cables routed into the chamber
by a qualified electrician and route it outside properly
from the chamber.
▶ The pump is installed, the qualified electrician can
make the electrical connection.
6.4.5 Portable wet well installation
WARNING
Risk of burns from hot surfaces!
Motor housing can become hot during operation. It
may cause burns. Allow the pump to cool down at
ambient temperature after switching it off!

en Installation and electrical connection
16 WILO SE 2017-03
WARNING
Separation of pressure hose!
Separation or movement of the pressure hose can
lead to (serious) injuries. Securely attach the pres-
sure hose to the outlet! Prevent buckling of the
pressure hose.
NOTICE
Delivery problems due to water level being
too low
The hydraulics are self-venting. As a result, smaller
air cushions are dissolved during the pumping pro-
cess. If the level of the fluid is lowered too much, the
volume flow can be interrupted. The minimum per-
missible water level must reach the upper edge of
the hydraulics housing!
For portable installation, the pump is equipped with a
pump support foot. The pump support foot ensures
minimum ground clearance in the suction area and en-
ables secure footing if placed on a solid bearing sur-
face. In this installation type, the pump can be installed
anywhere in the operating space/installation site. A
hard base must be used at the installation location to
prevent sinking in case of soft bearing surfaces. A pres-
sure hose is connected on the pressure side.
CAUTION!If the motor emerges during operation,
observe the operating mode for non-immersed oper-
ation (S2-15, S3 10%*)!
* Operating mode S325% is permitted if the necessary
motor cooling is guaranteed before the motor is
switched on again! To ensure the required cooling, the
motor must be completely immersed for at least 1min.!
Work steps
1
2
3
4
5
S1
S2, S3
6
Fig.7: Wet well installation, portable
1 Pump with integrated pump support foot
2 Pipe elbow with hose connection or Storz pipe coupling
3 Storz hose coupling
4 Pressure hose
5 Attachment point
6 Lifting equipment
CAUTION
Damage to the pump due to incorrect install-
ation
Observe the following points during the installation
of the pump:
• Observe the max. permissible tightening torque:
15Nm (V05) or 25Nm (V06)
• Do not insert an additional gasket between the
flange and the accessories! A gasket is mounted
on the pump flange!
• Only use accessories with a flange shape in ac-
cordance with EN1092-2, type A. The use of
other flange shapes is not permitted!
‡Pressure connection prepared: Pipe elbow with hose
connection or pipe elbow with Storz coupling mounted.
1. Use a shackle to attach the lifting equipment to the at-
tachment point of the pump.
2. Lift the pump and lower it at the intended location
(chamber, pit).
3. Place the pump on a solid bearing surface. CAU-
TION!Sinking must be prevented!
4. Lay the pressure hose and fasten it to a certain point
(e.g. drainage). DANGER!Separation or movement of
the pressure hose can lead to (serious) injuries! Se-
curely attach the pressure hose to the outlet.
5. Lay the power supply cable properly. CAUTION!Do not
damage the power supply cable!
▶ The pump is installed, the qualified electrician can
make the electrical connection.
6.4.6 Level control
With a level control device, the current fill levels are de-
termined and the pump is switched on and off auto-
matically depending on the fill levels. Fill levels are re-
corded by using different sensor types (float switches,
pressure and ultrasound measurements or electrodes).
The following must be observed when using a level
control device:
▪Float switches can move freely!

Installation and electrical connection en
Installation and operating instructions Wilo-Rexa UNI 17
▪The water level must not fall below the minimum per-
missible!
▪The maximum switching frequency must not be ex-
ceeded!
▪If the fill levels fluctuate strongly, a level control with
two measuring points is recommended. This makes it
possible to achieve larger differential gaps.
Use of attached float switch
The “A” version is equipped with a float switch. The
pump is switched on and off depending on the fill level.
The switching level is determined by the cable length
of the float switch.
Use of on-site level controls
When using an on-site level control device, refer to the
manufacturer’s own installation and operating instruc-
tions for specifications on the installation.
6.4.7 Dry-running protection
Dry-running protection must prevent the pump from
operating without fluid and air from entering the hy-
draulics. Minimum permissible fill level must be de-
termined with the help of a signal transmitter. Once the
specified limit value is reached, the pump must be de-
activated with an appropriate signal. Dry-running pro-
tection can expand the available level controls by an
additional measuring point or function as an independ-
ent switch-off device. Depending on the system secur-
ity, the pump can be restarted automatically or manu-
ally. Installation of a dry-running protection is recom-
mended for optimum operational reliability.
6.5 Electrical connection
DANGER
Risk of death due to electrocution!
Improper conduct when carrying out electrical work
can lead to death due to electric shock! Electrical
work must be carried out by a qualified electrician in
accordance with the locally applicable regulations.
▪The mains connection must match the specifications
on the rating plate.
▪Power supply on mains side for three-phase current
motors with clockwise rotating field.
▪Lay the power supply cables in accordance with the
locally applicable regulations and connect them ac-
cording to the wire assignment.
▪Connect the monitoring devices and check their func-
tion.
▪Earth the device properly in accordance with the locally
applicable regulations.
6.5.1 Fuse on mains side
Circuit breaker
The size of the circuit breakers conforms to the rated
current of the pump. The switching characteristics
should comply with group B or C. Observe local regula-
tions.
Motor protection switch
Make provision for an on-site motor protection switch
for devices without a plug! The minimum requirement
is a thermal relay/motor protection switch with tem-
perature compensation, differential triggering and
anti-reactivation device in accordance with the local
regulations. In case of sensitive mains, make provision
for the installation on-site of other protective equip-
ment (e.g. overvoltage, undervoltage or phase failure
relay, etc.).
Residual-current device (RCD)
Comply with the regulations of the local energy supply
company! The use of a residual-current device is re-
commended.
If persons come into contact with the device and con-
ductive fluids, secure the connection with a residual-
current device (RCD).
6.5.2 Maintenance tasks
Carry out the following maintenance tasks prior to in-
stallation:
▪Check the insulation resistance of the motor winding.
▪Test the resistor of the temperature sensor.
If the measured values differ from the specifications,
moisture may have penetrated into the motor or the
power supply cable or the monitoring device is defect-
ive. Contact customer service in the event of a fault.
6.5.2.1 Checking the insulation resistance of the motor
winding
Use an insulation tester to measure the insulation res-
istance (measuring voltage = 1000V). Observe the fol-
lowing values:
▪At the time of initial commissioning: Insulation resist-
ance may not be less than 20MΩ.
▪For further measurements: Value must be greater than
2MΩ.
NOTICE!For motors with an integrated capacitor,
short-circuit the windings prior to checking!

en Installation and electrical connection
18 WILO SE 2017-03
6.5.2.2 Test the resistor of the temperature sensor
Measure the resistor of the temperature sensors with
an ohmmeter. The bimetallic strips must have a meas-
ured value of 0Ohm (passage).
6.5.3 Connection of the single-phase motor
U1/Z1
bn
U2
bu
Cr
M 1~
gn-ye
LNPE
Fig.8: Connection diagram single-phase motor
Wire colour Terminal
Brown (bn) L
Blue (bu) N
Green/yellow (gn-
ye)
Earth
The single-phase current version is equipped with a
shockproof plug. The connection to the mains is estab-
lished by inserting the plug into a socket. The plug is
not overflow-proof. Install the socket so that it is
overflow-proof! Observe the information on the pro-
tection class (IP) of the plug.
DANGER!If the pump is connected directly to the
switchgear, dismantle the plug and arrange for the
electrical connection to be carried out by a qualified
electrician!
6.5.4 Connection three-phase motor
W
5 1 2
V
4
U
3
M 3~
gn-ye
L3L2 2120L1PE
250 V (AC); 2,5 A; cos φ = 1
Fig.9: Connection diagram three-phase motor
Wire number Designation Terminal
1 20 WSK
2 21 WSK
3 U L1
4 V L2
5 W L3
Green/yellow (gn-
ye)
Earth PE
For three-phase current motors, a clockwise rotating
field must be available. The three-phase version is
equipped with a CEE plug or with a free cable end:
▪If a CEE plug is supplied, connection to the mains is es-
tablished by inserting the plug into a socket. The plug is
not overflow-proof. Install the socket so that it is
overflow-proof! Observe the information on the pro-
tection class (IP) of the plug.
▪If there is a free cable-end, the pump must be connec-
ted directly to the switchgear. DANGER!If the pump is
connected directly to the switchgear, arrange for the
electrical connection to be carried out by a qualified
electrician!
6.5.5 Monitoring equipment connection
All monitoring equipment must be connected!
6.5.5.1 Monitoring of motor winding
Single-phase current motor
Thermal motor monitoring is self-switching for single-
phase current motors. The monitoring function is al-
ways active and does not need to be connected separ-
ately.
Three-phase current motor with bimetallic strip
Bimetallic strips are connected in the switchgear itself
or via an evaluation relay.
Connection values: max. 250V(AC), 2.5A, cos φ = 1
When the threshold is reached, deactivation must
take place.
In the version with an attached plug, the thermal motor
monitoring is pre-wired and set to the correct value in
the plug.
6.5.6 Motor protection adjustment
Motor protection must be set depending on the selec-
ted activation type.
6.5.6.1 Direct activation
At full load, set the motor protection switch to the
rated current (see rating plate). At partial load, it is re-
commended to set the motor protection switch 5%
above the current measured at the duty point.

Commissioning en
Installation and operating instructions Wilo-Rexa UNI 19
6.5.6.2 Soft starter
At full load, set the motor protection switch to the
rated current (see rating plate). At partial load, it is re-
commended to set the motor protection switch 5%
above the current measured at the duty point. The fol-
lowing must also be observed:
▪Power consumption must always be below the rated
current.
▪Complete starting and stopping within 30s.
▪To avoid power dissipation, bypass the electronic
starter (soft start) once normal operation is reached.
6.5.7 Operation with frequency converter
Operation on the frequency converter is not permitted.
7 Commissioning
WARNING
Foot injuries due to lack of protective equip-
ment!
Danger of (serious) injuries during work. Wear safety
shoes!
7.1 Personnel qualifications
▪Electrical work: Electrical work must be carried out by a
qualified electrician (in accordance with EN50110-1).
▪Operation/control: Operating personnel must be in-
structed in the functioning of the complete system.
7.2 Operator responsibilities
▪Providing installation and operating instructions by the
pump or at a place specially reserved for it.
▪Making the installation and operating instructions
available in the language of the personnel.
▪Making sure that the installation and operating instruc-
tions are read and understood by all personnel.
▪All safety devices and emergency cut-outs on the sys-
tem-side must be active and checked to ensure that
they work properly.
▪The pump is suitable for use under the specified oper-
ating conditions.
7.3 Direction of rotation check (for three-phase current
motors only)
The pump is factory-checked and adjusted to the cor-
rect direction of rotation for a clockwise rotating field.
Connection is made in accordance with the specifica-
tions in chapter “Electrical connection”.
Direction of rotation check
A qualified electrician checks the rotating field at the
mains connection with a rotating field-test device. For
the correct direction of rotation, a clockwise rotating
field must be available at the mains connection. The
pump is not approved for operation with a counter-
clockwise rotating field! CAUTION!If the direction of
rotation is checked with a test run, comply with the
ambient and operating conditions!
Incorrect direction of rotation
If the direction of rotation is incorrect, change the con-
nection as follows:
▪Swap two phases for motors with direct starting.
▪Swap the connections of two windings (e.g. U1/V1 and
U2/V2) for star-delta activation motors.
7.4 Before switching on
Check the following prior to activation:
▪Check whether the device has been installed properly
and in accordance with the locally applicable regula-
tions:
– Has the pump been earthed?
– Layout of power supply cable tested?
– Electrical connection made properly?
– Mechanical components attached correctly?
▪Check level control:
– Float switches can move freely?
– Switching level tested (pump on, pump off, minimum
water level)?
– Additional dry-running protection installed?
▪Test operating conditions:
– Min./max. temperature of the fluid tested?
– Max. immersion depth tested?
– Operating mode defined depending on the minimum
water level?
– Maximum switching frequency adhered to?
▪Check installation location/operating space:
– Pipe system on the pressure side free of deposits?
– Inlet or pump sump cleaned or free of deposits?
– All gate valves open?
– Minimum water level defined and monitored?
The hydraulics housing must be filled completely
with the fluid and there must be no air cushions in
the hydraulics. NOTICE!Provide suitable venting
devices if there is a risk of air cushions being
formed in the system!
7.5 Switch on and off
During the start process, the rated current is temporar-
ily exceeded. During operation, the rated current may

en Decommissioning/dismantling
20 WILO SE 2017-03
no longer be exceeded. CAUTION!If the pump does
not start, switch off the pump immediately. Remove
the fault before reactivating the pump!
Place pumps which are installed as portable pumps on a
firm surface so they are level. If pumps have fallen over,
place them upright again before activating them. Se-
curely attach the pump with screws in case of difficult
surfaces.
Pump with attached float switch and plug
▪Single-phase current version: After inserting the plug
into the socket, the pump is ready for operation. The
pump is switched on and off automatically depending
on the fill level.
▪Three-phase version: After inserting the plug into the
socket, the pump is ready for operation. The pump is
controlled via two switches on the plug:
– HAND/AUTO: Determines if the pump is switched on
and off directly (HAND) or depending on the fill level
(AUTO).
– ON/OFF: Switch pump on and off.
Pump with attached plug
▪Single-phase current version: After inserting the plug in
the socket, the pump is switched on.
▪Three-phase version: After inserting the plug into the
socket, the pump is ready for operation. The pump is
switched on and off with the ON/OFF switch.
Pumps with free cable end
The pump must be switched on and off using a separ-
ate operating point (on/off switch, switchgear)
provided by the customer.
7.6 During operation
WARNING
Amputation of limbs due to rotating com-
ponents!
No persons must be present in the work area of the
pump! There is risk of (serious) injuries due to rotat-
ing components! No persons must be present in the
work area of the pump during start-up or operation.
WARNING
Risk of burns from hot surfaces!
Motor housing can become hot during operation. It
may cause burns. Allow the pump to cool down at
ambient temperature after switching it off!
NOTICE
Delivery problems due to water level being
too low
The hydraulics are self-venting. As a result, smaller
air cushions are dissolved during the pumping pro-
cess. If the level of the fluid is lowered too much, the
volume flow can be interrupted. The minimum per-
missible water level must reach the upper edge of
the hydraulics housing!
When operating the pump, observe the locally applic-
able regulations on the following topics:
▪Work safety
▪Accident prevention
▪Handling electrical machines
Strictly adhere to the responsibilities of the personnel
specified by the operator. All personnel are responsible
for ensuring that the responsibilities of the personnel
and the regulations are observed!
Due to their design, centrifugal pumps have rotating
parts that are easily accessible. Depending on the oper-
ating condition, sharp edges can develop on these
parts. WARNING!This can lead to cuts and limbs may
be amputated and severed! Check the following at
regular intervals:
▪Operating voltage (+/-10% of the rated voltage)
▪Frequency (+/-2% of the rated frequency)
▪Power consumption between individual phases (max.
5%)
▪Voltage difference between the individual phases
(max.1%)
▪Max. switching frequency
▪Minimum water submersion depending on the operat-
ing mode
▪Inlet: no air intake
▪Level control device/dry-running protection: Switching
points
▪Quiet/low-vibration running
▪All gate valves open
8 Decommissioning/dismantling
8.1 Personnel qualifications
▪Operation/control: Operating personnel must be in-
structed in the functioning of the complete system.
▪Electrical work: Electrical work must be carried out by a
qualified electrician (in accordance with EN50110-1).