Wilo Helix2.0-VE User manual

Pioneering for You
·
Drive for Wilo-Helix2.0-VE / Wilo-Medana CH3-LE
4254674 • Ed.02/2023-03
en Installation and operating instructions

3
English ............................................................................................................................. 4

en
4 Installation and operating instructions • Drive for Wilo-Helix2.0-VE / Wilo-Medana CH3-LE • Ed.02/2023-03
Table of contents
1 General information...................................................................5
1.1 About these instructions ..................................................... 5
1.2 Copyright ............................................................................... 5
1.3 Subject to change................................................................. 5
2 Safety...........................................................................................5
2.1 Identification of safety instructions................................... 5
2.2 Personnel qualifications....................................................... 6
2.3 Electrical work .......................................................................7
2.4 Transport................................................................................ 7
2.5 Installation / Dismantling..................................................... 8
2.6 Maintenance tasks................................................................ 8
2.7 Operator responsibilities...................................................... 8
3 Application/use...........................................................................9
3.1 Intended use.......................................................................... 9
3.2 Improper use........................................................................10
4 Description of the drive...........................................................10
4.1 Product description ............................................................10
4.2 Technical data .....................................................................12
4.3 Scope of delivery.................................................................13
4.4 Accessories ..........................................................................13
5 Installation ................................................................................13
5.1 Personnel qualifications.....................................................13
5.2 Operator responsibilities....................................................13
5.3 Safety....................................................................................14
5.4 Permitted installation positions and change of the ar-
rangement of components before the installation........15
5.5 Permitted installation positions with horizontal motor
shaft......................................................................................15
5.6 Preparing the installation...................................................16
5.7 Double pump installation...................................................17
5.8 Installation and position of additional sensors to be con-
nected...................................................................................18
6 Electrical connection ...............................................................19
6.1 Mains connection................................................................24
6.2 SSM and SBM connection ..................................................26
6.3 Connection of digital, analogue and bus inputs.............26
6.4 Differential pressure sensor connection .........................27
6.5 Wilo Net connection...........................................................27
6.6 Turn of the display..............................................................27
7 Installation of CIF module........................................................28
8 Commissioning .........................................................................29
8.1 Procedure after switching on the power supply during
initial commissioning..........................................................29
8.2 Description of the operating elements............................30
8.3 Pump operation...................................................................31
9 Control settings........................................................................37
9.1 Control functions................................................................38
9.2 Selecting a control mode...................................................40
9.3 Switch off the pump...........................................................48
9.4 Configuration storage/data storage.................................49
10 Monitoring functions ...............................................................49
10.1 Min. pressure detection.......................................................50
10.2 Max. pressure detection......................................................50
10.3 Lack of water detection .....................................................51
11 Double pump operation............................................................53
11.1 Function.................................................................................53
11.2 Settings menu.......................................................................55
11.3 Display in double pump operation.....................................57
12 Communication interfaces: Setting and function .................58
12.1 Menu overview of “External interfaces”...........................58
12.2 SSM application and function.............................................58
12.3 SSM relay forced control .....................................................60
12.4 SBM application and function ............................................60
12.5 SBM relay forced control.....................................................61
12.6 Application and function of the digital control input DI 1
................................................................................................62
12.7 Application and function of the analogue inputs AI1 and
AI2 ..........................................................................................65
12.8 Application and function of the Wilo Net interface........71
12.9 Application and function of CIF module...........................72
13 Display settings.........................................................................72
13.1 Brightness..............................................................................73
13.2 Language...............................................................................73
13.3 Units.......................................................................................73
13.4 Key lock ON...........................................................................74
14 Additional settings....................................................................74
14.1 Pump kick..............................................................................75
14.2 Setting pump ramp times ...................................................75
14.3 PWM frequency reduction ..................................................76
14.4 Fluid correction.....................................................................76
15 Diagnostics and measured values ...........................................76
15.1 Diagnostics help...................................................................77
15.2 Measured values...................................................................80
16 Reset...........................................................................................81
16.1 Factory setting .....................................................................81
17 Faults, causes and remedies ....................................................82
17.1 Mechanical faults without error messages.......................83
17.2 Error messages .....................................................................83
17.3 Warning messages ...............................................................85
18 Maintenance ..............................................................................88
18.1 Replacing the electronic module .......................................90
18.2 Replacing the motor/drive ..................................................91
18.3 Module fan replacement .....................................................91
19 Spare parts.................................................................................93
20 Disposal......................................................................................94

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Installation and operating instructions • Drive for Wilo-Helix2.0-VE / Wilo-Medana CH3-LE • Ed.02/2023-03 5
1 General information
1.1 About these instructions These instructions form part of the product. Compliance with the instructions is essential
for correct handling and use:
•Read the instructions carefully before all activities.
•Keep the instructions in an accessible place at all times.
•Observe all product specifications.
•Observe the markings on the product.
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 WILO SE © 2023
The reproduction, distribution and utilization of this document as well as the communica-
tion of its contents to others without express authorization is prohibited. Offenders will be
held liable for the payment of damages. All rights reserved.
1.3 Subject to change Wilo shall reserve the right to change the listed data without notice and shall not be liable
for technical inaccuracies and/or omissions. The illustrations used may differ from the ori-
ginal and are intended as an example representation of the device.
2 Safety This chapter contains basic information for the individual phases
of the life cycle. Failure to observe this information carries the
following risks:
•Injury to persons from electrical, mechanical and bacteriological
factors as well as electromagnetic fields
•Environmental damage from discharge of hazardous sub-
stances
•Property damage
•Failure of important functions of the product
Failure to observe the information contained herein will result in
the loss of claims for damages.
The instructions and safety instructions in the other chapters
must also be observed!
2.1 Identification of safety
instructions
Symbols:
WARNING
General safety symbol
WARNING
Danger caused by electric voltage
NOTICE
Notices
Signal words

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6 Installation and operating instructions • Drive for Wilo-Helix2.0-VE / Wilo-Medana CH3-LE • Ed.02/2023-03
DANGER
Imminent danger.
Failure to observe the safety instructions will result in serious injuries or
death!
WARNING
Failure to follow instructions can lead to (serious) injury!
CAUTION
Failure to follow instructions can lead to property damage, total loss is
possible. “Caution” is used when there is a risk to the product if the user
does not observe procedures.
NOTICE
Note containing useful information for the user about the product. It as-
sists the user in the case of an issue;
Follow all information that appears on the product and ensure
that it remains permanently legible:
•Warnings
•Rating plate
•direction of rotation arrow
•Identification of connections
2.2 Personnel qualifications Personnel must:
•Be instructed about locally applicable regulations governing ac-
cident prevention.
•Have read and understood the installation and operating in-
structions.
Personnel must have the following qualifications:
•Electrical work: A qualified electrician must carry out the elec-
trical work.
•nstallation/dismantling: The technician must be trained in the
use of the necessary tools and fixation materials.
•The product must be operated by persons who have been in-
structed on how the complete system functions.
•Maintenance work: The technician must be familiar with the
use of operating fluids and their disposal.
Definition of “qualified electrician”
A qualified electrician is a person with appropriate technical edu-
cation, knowledge and experience who can identify and prevent
electrical hazards. The operator must confirm and ensure the field
of authority, the competence and the monitoring of the person-

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Installation and operating instructions • Drive for Wilo-Helix2.0-VE / Wilo-Medana CH3-LE • Ed.02/2023-03 7
nel. If the personnel do not possess the necessary knowledge,
they must be trained and instructed. If required, this can be car-
ried out by the product manufacturer at the operator’s request.
2.3 Electrical work •Have electrical work carried out by a qualified electrician.
•When connecting to the local power supply system, comply
with the nationally applicable guidelines, standards and regula-
tions as well as specifications issued by the local energy supply
companies.
•Before commencing work, disconnect the product from the
mains and secure it against being switched on again.
•Give personnel training on how to establish the electrical con-
nection and the methods for switching off the product.
•Protect the electrical connection with a residual-current device
(RCD).
•Observe the technical information in these installation and op-
erating instructions as well as on the rating plate.
•Earth the product.
•Comply with the manufacturer’s specifications when connect-
ing the product to electrical switching systems.
•Have a defective connection cable replaced immediately by a
qualified electrician.
•Never remove operating elements.
WARNING
DANGER
When dismantled, the permanent magnet rotor inside the pump can
pose mortal danger for people with medicl implants (e.g. pacemakers).
Follow the general behavioural guidelines tht apply to handling elec-
trical devices!
Do not open the motor!
Dismantling and installation of the rotor may only be carried out by
Wilo customer service! If you have been fitted with a pacemaker, you
must not carry out this kind of work!
NOTICE
The magnets inside the motor do not pose a danger provided the motor
is completely assembled. Persons with pacemakers can approach the
pump without restrictions.
2.4 Transport •Wear protective equipment:
–Safety gloves for protection against cuts
–Safety shoes
–Sealed safety glasses
–Safety helmet (when using lifting equipment)
•Only use legally specified and approved lifting slings.
•Select lifting gear based on the available conditions (weather,
attachment point, load, etc.).

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8 Installation and operating instructions • Drive for Wilo-Helix2.0-VE / Wilo-Medana CH3-LE • Ed.02/2023-03
•Always attach the lifting gear to the designated attachment
points (lifting eyes).
•Position the lifting equipment in a way that ensures stability
during use.
•When using lifting equipment, a second person must be
present to coordinate the procedure if required (e.g. if the op-
erator’s field of vision is blocked).
•Persons must not stand underneath suspended loads. Do not
move loads over workplaces where people are present.
2.5 Installation / Dismantling •Wear protective equipment:
–Safety shoes
–Safety gloves for protection against cuts
–Safety helmet (when using lifting equipment)
•Locally applicable laws and regulations on work safety and ac-
cident prevention must be complied with.
•Disconnect the device from the mains and secure it against be-
ing switched on again without authorisation.
•All rotating parts must be at a standstill.
•Close the gate valve in the inlet and in the pressure pipe.
•Provide adequate aeration in enclosed spaces.
•Make sure that there is no risk of explosion when carrying out
any type of welding work or work with electrical devices.
2.6 Maintenance tasks •Wear protective equipment:
–Sealed safety glasses
–Safety shoes
–Safety gloves for protection against cuts
•Locally applicable laws and regulations on work safety and ac-
cident prevention must be complied with.
•The procedure described in the installation and operating in-
structions for shutting down the product/unit must be strictly
observed.
•Only original parts from the manufacturer may be used for
maintenance and repairs. The use of any non-original parts re-
leases the manufacturer from any liability.
•Disconnect the device from the mains and secure it against be-
ing switched on again without authorisation.
•All rotating parts must be at a standstill.
•Close the gate valve in the inlet and in the pressure pipe.
•Store tools at the designated locations.
•After completing work, reattach all safety and monitoring
devices and check that they function properly.
2.7 Operator responsibilities •Provide installation and operating instructions in a language
which the personnel can understand.

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Installation and operating instructions • Drive for Wilo-Helix2.0-VE / Wilo-Medana CH3-LE • Ed.02/2023-03 9
•Make sure that personnel are suitably trained for the specified
work.
•Verify the area of responsibility and individual responsibilities
of personnel.
•Provide the necessary protective equipment and make sure
that personnel wear it.
•Ensure that safety and information signs mounted on the
device are always legible.
•Train personnel with regard to the operating principles of the
system.
•Eliminate risks from electrical current.
•Equip hazardous components (extremely cold, extremely hot,
rotating, etc.) with a guard to be provided by the customer.
•Keep highly flammable materials at a safe distance from the
product.
•Ensure compliance with the regulations for accident preven-
tion.
•Ensure compliance with local directives or general directives
[e.g. IEC, VDE, etc.] and instructions from local energy supply
companies.
Follow all information that appears on the product and ensure
that it remains permanently legible:
•Warnings
•Rating plate
•direction of rotation arrow
•Identification of connections
This device can be used by children from 8 years of age as well as
people with reduced physical, sensory or mental capacities or lack
of experience and knowledge if they are supervised or instructed
on the safe use of the device and they understand the dangers
that can occur. Children are not allowed to play with the device.
Cleaning and maintenance by the user must not be carried out by
children without supervision.
3 Application/use
3.1 Intended use The drive is used in vertical and horizontal multistage pump series. They can be used for:
•Water distribution and boosting
•Industrial circulation systems
•Process water
•Closed cooling circuits
•Heating
•Washing systems
•Irrigation
Installation within a building:
Drive is to be installed in dry, well-ventilated, frost-proof rooms.

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10 Installation and operating instructions • Drive for Wilo-Helix2.0-VE / Wilo-Medana CH3-LE • Ed.02/2023-03
Installation outside a building (outdoor installation)
•Observe permissible environmental conditions and protection class.
•Install the drive in a housing as weather protection. Observe permissible ambient tem-
peratures (see “Technical data” table).
•Protect the drive against the effects of weather, for example, direct sunlight, rain and
snow.
•Protect the drive so that the condensate drain openings remain free of dirt.
•Take suitable measures to prevent the formation of condensation water.
Intended use includes compliance with these instructions as well as the information and
markings on the drive.
Any use beyond the intended use is considered misuse and will void any warranty claims.
3.2 Improper use The operational reliability of the supplied product is only guaranteed for intended use in ac-
cordance with chapter "Intended use" of the installation and operating instructions. The
limit values must not fall below or exceed those values specified in the catalogue/data
sheet.
CAUTION
Misuse of the drive can lead to dangerous situations and dam-
age!
Drive without an Ex rating are not suitable for use in potentially explosive
atmospheres.
. Highly flammable materials/fluids should always be kept at a safe dis-
tance from the device.
. Never allow unauthorised work.
. Never carry out unauthorised conversions.
. Use authorised accessories and genuine spare parts only.
4 Description of the drive
4.1 Product description The drive is composed of frequency inverter and "Electronic Commutated Motor" (ECM) to
be integrated on vertical and horizontal multistage pump.
Fig. 1 show an exploded view drawing of the drive with the main components. The drive
structure is explained in detail below.
Arrangement of the main components according to Fig.1, Fig. 2 and Fig. 3 of the table "Ar-
rangement of the main components":
Fig.1: Main components

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Installation and operating instructions • Drive for Wilo-Helix2.0-VE / Wilo-Medana CH3-LE • Ed.02/2023-03 11
No. Component
1 Electronic module lower part
2 Electronic module upper part
3 Fastening screws of the electronic module upper part, 4x
4 Fastening screws of the electronic module lower part, 4x
5 Fastening screw of the motor, main fastening, 4x
6 Motor adapter for electronic module
7 Motor housing
8 Fixation points for transport lugs on motor housing, 2x
9 Motor flange
10 Motor shaft
11 Key shaft
12 Lantern
13 O-ring
Table1: Arrangement of the main components

Fig.2: Drive overview
Item Name Explanation
1 Motor Drive unit. Forms the drive together with the elec-
tronic module.
2 Graphic display Provides information about settings and pump
status. Self-explanatory user interface for setting the
pump.
3 Electronic module Electronic unit with graphic display
4 Electrical fan Cools down the electronic module.
5 Wilo-Connectivity Inter-
face
Optional interface
Table2: Description of the pump
1. The motor with mounted electronic module can be rotated relative to the lantern. Ob-
serve the instructions in the chapter "Permitted installation positions and change of
the arrangement of components before the installation".
2. The display can be rotated in 90° steps as required. (see chapter on “Electrical connec-
tion”).
3. Electronic module
4. An unobstructed and free air flow must be ensured around the electric fan. (See
chapter on “Installation”)

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12 Installation and operating instructions • Drive for Wilo-Helix2.0-VE / Wilo-Medana CH3-LE • Ed.02/2023-03
Fig.3: Rating plates
1 Pump rating plate
2 Drive rating plate
Table3: Rating plates
•There is a serial number on the pump rating plate. It must be specified e.g. for ordering
spare parts.
•The drive rating plate is located on the side of the electronic module. The electrical con-
nection must be designed according to the specifications on the drive rating plate.
4.2 Technical data
Property Value Notice
Electrical connection
Voltage range 1~220V…1~240V (±10%),
50/60Hz
3~380V…3~440V (±10%),
50/60Hz
Supported mains types:
TN, TT, IT1)
Performance range 1~ 0.55kW…2.2kW
3~ 0.55kW…7.5kW
depending on drive type
Speed range 1000rpm 3600rpm depending on drive type
Ambient conditions2)
Protection class IP55 EN 60529
Ambient temperature during opera-
tion min./max.
0 °C ... +50 °C Lower or higher ambient temperatures on
request
Temperature during storage min./
max.
-30 °C ... +70 °C > +60 °C limited to a duration of 8 weeks
Temperature during transport min./
max.
-30 °C ... +70 °C > +60 °C limited to a duration of 8 weeks
relative humidity <95%, non-condensing
Installation height max. 2000m above sea level
Insulation class F
Pollution degree 2 DIN EN 61800-5-1
Motor protection Integrated
Overvoltage protection Integrated
Overvoltage category OVC III + SPD/MOV3) Overvoltage Category III + Surge Protective
Device/ Metal Oxide Varistor

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Installation and operating instructions • Drive for Wilo-Helix2.0-VE / Wilo-Medana CH3-LE • Ed.02/2023-03 13
Property Value Notice
Protection function control termin-
als
SELV, galvanically isolated
Electromagnetic compatibility
Interference emission in accordance
with:
Interference immunity in accord-
ance with:
EN 61800-3:2018
EN 61800-3:2018
Residential environment (C1) 4)
Industrial environment (C2)
1) TN and TT power supplies with earthed live wires are not permitted.
2)For more detailed, product-specific information such as power consumption, dimensions
and weights, refer to the technical documentation in the catalogue or Wilo-Select online.
3)Over Voltage Category III + Surge Protective Device/Metall Oxid Varistor.
4) In the case of 3~ input power supply with motor powers of 2.2 and 3 kW, EMC irregularit-
ies can occur under unfavourable circumstances when used in residential environments
(C1) with low electrical power in the conducted range. In this case, please contact WILO SE
so that together we can find a quick and suitable shutdown measure.
Fluids
Water-glycol mixtures or fluids with a different viscosity than pure water increase the
power consumption of the pump. Mixtures with a proportion of glycol of >10% influence
the p-v- and Δp-v characteristic curve and the flow calculation.
4.3 Scope of delivery •Drive
•Installation and operating instructions and declaration of conformity
4.4 Accessories Accessories must be ordered separately:
•CIF module PLR for connecting to PLR/interface converter
•CIF module LON for connection to the LONWORKS mains network
•CIF module BACnet
•CIF module Modbus
•CIF module CANopen
•CIF module Ethernet
•Connection M12 RJ45 CIF Ethernet
•Differential pressure kit 4 – 20mA
•Relative pressure kit 4 – 20mA
For a detailed list, consult the catalogue and spare parts documentation.
NOTICE
CIF modules may only be plugged in when the pump is de-energised
(voltage-free).
5 Installation
5.1 Personnel qualifications •Installation/dismantling must be carried out by a qualified technician who is trained in
the use of the necessary tools and fixation materials.
5.2 Operator responsibilities •Observe national and regional regulations!
•Observe locally applicable accident prevention and safety regulations of professional
and trade associations.
•Provide protective equipment and ensure that the protective equipment is worn by per-
sonnel.
•Observe all regulations for working with heavy loads.

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14 Installation and operating instructions • Drive for Wilo-Helix2.0-VE / Wilo-Medana CH3-LE • Ed.02/2023-03
5.3 Safety
DANGER
When dismantled, the permanent magnet rotor inside the motor can
pose mortal danger for people with medical implants (e.g. pacemakers).
. Follow the general behavioural guidelines that apply to handling elec-
trical devices!
. Do not open the motor!
. Dismantling and installation of the rotor may only be carried out by Wilo
customer service! If you have been fitted with a pacemaker, you must
not carry out this kind of work!
DANGER
Risk of fatal injury due to lack of protective device!
Due to missing protective devices of the drive, electric shock or contact
with rotating parts can lead to life-threatening injuries.
Before commissioning, safety devices such as inverter cover or coupling
covers that were removed must be reinstalled!
WARNING
Potentially fatal injury due to drive not being installed!
A life-threatening voltage may be present at the motor contacts! Normal
operation of the pump is only permitted with the drive installed.
Never connect or operate the pump without the drive mounted!
WARNING
Danger of death from falling parts!
The drive itself and drive parts can be extremely heavy. Falling parts pose
a risk of cuts, crush injuries, bruises or impacts which can be fatal.
. Always use suitable lifting equipment and secure parts against falling.
. Never stand underneath a suspended load.
. During storage and transport, as well as before all installation and as-
sembly work, ensure that the drive is in a safe position and standing se-
curely.
WARNING
Personal injury due to strong magnetic forces!
Opening the motor leads to high, abruptly occurring magnetic forces.
This can lead to serious cuts, crushing injuries and bruises.
Do not open the motor!
WARNING
Hot surface!
There is a risk of burns!
Allow the pump to cool down before commencing any work!

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Installation and operating instructions • Drive for Wilo-Helix2.0-VE / Wilo-Medana CH3-LE • Ed.02/2023-03 15
5.4 Permitted installation positions
and change of the arrangement of
components before the installation
Fig.4: Arrangement of the components upon delivery
The component arrangement concerning the pump housing is pre-assembled as a factory
setting and can be changed at the operating location if required. This may be necessary, for
example, in the following cases:
•Ensuring pump venting
•Enabling better operation
•Avoid impermissible installation positions (motor and/or inverter point downwards). In
most cases, it is enough to rotate the motor impeller unit relative to the pump housing.
The possible arrangement of components is the result of the permitted installation posi-
tions.
5.5 Permitted installation positions
with horizontal motor shaft
Fig.5: Permitted installation positions with motor shaft and electronic module facing up
(0°)
Fig.6: Condensate drain openings
Only in this position (0°) can condensate be directed away via existing drilled holes in the
motor.

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16 Installation and operating instructions • Drive for Wilo-Helix2.0-VE / Wilo-Medana CH3-LE • Ed.02/2023-03
5.6 Preparing the installation
DANGER
Danger of death from falling parts!
The drive parts can be extremely heavy. Falling parts pose a risk of cuts,
crush injuries, bruises or impacts which can be fatal.
. Always use suitable lifting equipment and secure parts against falling.
. Never stand underneath a suspended load.
. During storage and transport, as well as before all installation and as-
sembly work, ensure that the pump is in a safe position and standing se-
curely.
WARNING
Risk of personal injury and property damage due to improper
handling!
. Never set up the drive unit on unfortified surfaces or surfaces that can-
not bear loads.
. Flush the pipeline system if required. Dirt can cause the pump to fail.
. Install only after completion of all welding and soldering work and after
the pipeline system has been flushed, if required.
. Observe the minimum axial distance of 100 mm between a wall and the
fan cover of the motor.
. Ensure free air access to the heat sink of the electronic module with at
minimum an axial distance of 100 mm with a wall.
•The drive must be protected from the weather and installed in a frost/dust-free, well-
ventilated environment that is not potentially explosive. Observe the instructions in “In-
tended use” section!
•The drive must be accessible for inspections, maintenance or replacement in the future.
•Install a device for attaching hoisting gear above the set-up site of large drive. Total
weight of the drive: see catalogue or data sheet.
WARNING
Personal injury and property damage due to improper handling!
Transport lugs mounted on the motor housing can tear out if the load is
too heavy. This can lead to serious injuries and damage to the product!
. Never transport the entire pump with the transport lugs attached to the
motor housing.
. Never use the transport lugs attached to the motor housing to separate
or pull out the motor unit.

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Installation and operating instructions • Drive for Wilo-Helix2.0-VE / Wilo-Medana CH3-LE • Ed.02/2023-03 17
Fig.7:
Transporting the drive
•Only lift the drive with approved lifting gear (e.g. block and tackle, crane). See also
chapter "Transport and temporary storage".
•Transport lugs mounted on the motor housing are only permitted for transporting the
motor!
NOTICE
Simplify subsequent work on the unit!
To ensure the entire unit does not have to be emptied, install shut-off
valves upstream and downstream of the pump.
CAUTION
Material damage due to turbine and generator operation!
Flowing through the pump in the direction of flow or against the direction
of flow can cause irreparable damage to the drive. Install a swing check
valve on the discharge side of each pump!
5.7 Double pump installation A double pump can be two single pumps operated in one common collector pipe.
NOTICE
For double pumps in a common collector pipe, one pump should be con-
figured as the main pump. The pressure sensor should be mounted on
this pump. The Wilo Net bus communication cable should be also moun-
ted and configured on main pump.
P
Fig.8: Example relative pressure sensor con-
nection in common collector pipe
Two single pumps as double pump in common collector pipe:
In the example, the main pump is the left-hand pump in the direction of flow. Connect the
pressure sensor to this pump! Connect and configure the two single pumps to form a double
pump. See chapter "double pump operation".
The measuring points of the relative pressure sensor must be on discharge side of the
double-pump system in the common collector pipe.

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18 Installation and operating instructions • Drive for Wilo-Helix2.0-VE / Wilo-Medana CH3-LE • Ed.02/2023-03
P
Fig.9: Example differential pressure sensor
connection in common collector pipe
Two single pumps as double pump in common collector pipe:
In the example, the main pump is the left-hand pump in the direction of flow. Connect the
differential pressure sensor to this pump! Connect and configure the two single pumps to
form a double pump. See chapter "double pump operation".
The measuring points of the differential pressure sensor must be on the suction and dis-
charge side of the double-pump system in the common collector pipe.
5.8 Installation and position of addi-
tional sensors to be connected
In the following cases, sensor sleeves must be installed in the pipes for the admission of
different sensors:
•Pressure sensor
•Other sensors
Pressure sensors:
In p-c control mode, the measuring points of the relative pressure sensor should be in-
stalled on the discharge side of the pump. Connect the cable connection to analogue in-
put1.
In dp-c or dp-v control mode, the measuring points of the differential pressure sensors
should be installed on the suction and discharge sides of the pump. Connect the cable con-
nection to analogue input1.
The differential pressure sensor is configured in the pump menu.
In p-v control mode, install the first measuring point of the relative pressure sensor on the
discharge side of the pump. Connect the relevant cable connection to analogue input1.
Install the second measuring point of the absolute or relative pressure sensor on the suc-
tion side of the pump. Connect the relevant cable connection to analogue input2.
Possible sensor types on suction side:
•Absolute
•Relative
Possible sensor types on Discharge side:
•Relative
Possible signal types on differential pressure sensors:
•0…10V
•2…10V
•0…20mA
•4…20mA
NOTICE
Available as an accessory:
Absolute, relative or differential pressure sensor for connection to the
pump
Other sensors
In “PID control” mode, it’s possible to connect other sensor types (Temperature sensor,
Flow sensor etc.) compatible with these signal types:
•0…10V

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Installation and operating instructions • Drive for Wilo-Helix2.0-VE / Wilo-Medana CH3-LE • Ed.02/2023-03 19
•2…10V
•0…20mA
•4…20mA
The cable connection should be connected to analogue input 1.
6 Electrical connection DANGER
Danger of death due to electrical current!
The use of a thermal overload protection is recommended!
Electrical connection may only be carried out by a qualified electrician
and in accordance with the applicable regulations!
Adhere to accident prevention regulations!
Before beginning work on the product, make sure that the drive are elec-
trically isolated.
Make sure that no one can turn on the power supply again before work is
completed.
Make sure that all energy sources can be isolated and locked. If the drive
was switched off by a safety device, it must be secured against switching
back on again until the error has been remedied.
Electrical machines must always be earthed. Earthing must be appropri-
ate for the drive and meet the relevant standards and regulations. Earth
terminals and fixation elements must be suitably dimensioned.
Connection cables must never touch the piping, pump or motor housing.
If it is possible for persons to come into contact with the drive, the
earthed connection must also be fitted with a residual current circuit
breaker.
Observe the installation and operating instructions for the accessories!
DANGER
Danger of death!
Touching live parts will result in serious injuries or death! Even when it is
disconnected, high contact voltages can still occur in the electronic
module due to non-discharged capacitors. Therefore, work on the elec-
tronic module must not be started until 5 minutes have elapsed!
Disconnect all poles of the supply voltage and secure against reconnec-
tion!
Check whether all connections (including potential-free contacts) are
voltage-free!
Never insert objects (e.g. nail, screwdriver, wire) into openings on the
electronic module!
Reinstall removed safety devices (such as module covers)!
DANGER
Risk of fatal electrical shock! Generator or turbine operation
during pump flow!
Even without the electronic module (without electrical connection),
there may be dangerous contact voltage at the motor contacts!
Close the shut-off devices upstream and downstream of the pump!

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20 Installation and operating instructions • Drive for Wilo-Helix2.0-VE / Wilo-Medana CH3-LE • Ed.02/2023-03
DANGER
Risk of fatal electrical shock!
Water on the upper part of the electronic module can enter the elec-
tronic module when it is opened.
Before opening, remove water, e.g. on the display, by wiping it off com-
pletely. Avoid water penetration in general!
CAUTION
Potential danger of death due to electronic module not being
installed!
A life-threatening voltage may be present at the motor contacts! Normal
operation of the pump is only permitted with the electronic module in-
stalled.
Never connect or operate the pump without the electronic module
mounted!
CAUTION
Property damage caused by improper electrical connection! An
inadequate mains design can lead to system failures and cable
fires due to mains overload!
When designing the mains supply with regard to the used cable cross-
sections and fuses, pay special attention to the fact that, in multi-pump
operation, it is possible that all pumps operate at the same time for short
periods.
CAUTION
Danger of material damage caused by improper electrical con-
nection!
Ensure that the current type and voltage of the mains connection corres-
pond to the specifications on the pump rating plate.
Threaded cable glands and threaded cable connections
There are six cable bushings to the terminal room on the electronic module. In case of drive
is delivered with a fan, the cable for its power supply on the electronic module is mounted
at the factory. The requirements for electromagnetic compatibility must be observed.
NOTICE
Only the threaded cable gland M25 for the mains connection and M20 for
the cable of the pressure sensor are installed at the factory. All other re-
quired threaded cable glands M20 must be provided by the customer.
CAUTION
In order to ensure IP55, unoccupied threaded cable glands must remain
closed with the plugs provided by the manufacturer.
When installing the threaded cable gland, make sure that a gasket is in-
stalled below the threaded cable gland.