Wilo Control EC-HVAC User manual

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Wilo-Control EC-HVAC
4255848 • Ed.01-SW: 3.02x/2023-03
en Installation and operating instructions

en
Installation and operating instructions • Wilo-Control EC-HVAC • Ed.01-SW: 3.02x/2023-03 3
Table of contents
1 General information...................................................................4
1.1 About these instructions ..................................................... 4
1.2 Copyright ............................................................................... 4
1.3 Subject to change................................................................. 4
1.4 Exclusion from warranty and liability.................................4
2 Safety...........................................................................................4
2.1 Identification of safety instructions................................... 4
2.2 Personnel qualifications....................................................... 5
2.3 Electrical work .......................................................................6
2.4 Monitoring devices ............................................................... 6
2.5 Installing/dismantling........................................................... 6
2.6 During operation ................................................................... 6
2.7 Maintenance tasks................................................................ 6
2.8 Operator responsibilities...................................................... 7
3 Intended use ...............................................................................7
4 Product description....................................................................7
4.1 Structure ................................................................................ 7
4.2 How it works.......................................................................... 7
4.3 Technical data .......................................................................7
4.4 Inputs and outputs ............................................................... 8
4.5 Type key................................................................................. 8
4.6 Scope of delivery................................................................... 8
4.7 Accessories ............................................................................ 8
5 Transportation and storage.......................................................9
5.1 Delivery................................................................................... 9
5.2 Transport................................................................................ 9
5.3 Storage ................................................................................... 9
6 Installation and electrical connection......................................9
6.1 Personnel qualifications....................................................... 9
6.2 Installation types................................................................... 9
6.3 Operator responsibilities...................................................... 9
6.4 Installation ............................................................................. 9
6.5 Electrical connection..........................................................10
7 Operation ..................................................................................16
7.1 How it works........................................................................17
7.2 Menu control........................................................................18
7.3 Menu type: Main menu or Easy Actions menu................18
7.4 Call up the menu .................................................................18
7.5 Quick access to “Easy Actions”.........................................18
7.6 Factory settings ..................................................................19
8 Commissioning .........................................................................19
8.1 Operator responsibilities....................................................19
8.2 Activating the switchgear..................................................20
8.3 Start initial configuration...................................................20
8.4 Start automatic mode ........................................................30
8.5 During operation .................................................................30
9 Shut-down ................................................................................32
9.1 Personnel qualifications.....................................................32
9.2 Operator responsibilities....................................................32
9.3 Shut-down...........................................................................32
9.4 Removal................................................................................32
10 Maintenance ..............................................................................33
10.1 Maintenance intervals .........................................................33
10.2 Maintenance tasks ...............................................................33
11 Faults, causes and remedies ....................................................33
11.1 Operator responsibilities.....................................................33
11.2 Fault indication.....................................................................33
11.3 Fault acknowledgement .....................................................34
11.4 Fault memory........................................................................34
11.5 Error codes ............................................................................34
11.6 Further steps for troubleshooting .....................................35
12 Disposal......................................................................................35
12.1 Information on the collection of used electrical and elec-
tronic products .....................................................................35
13 Appendix....................................................................................35
13.1 System impedances.............................................................36
13.2 Overview of the symbols ....................................................37
13.3 Overview of terminal diagrams ..........................................37
13.4 ModBus: Data types .............................................................38
13.5 ModBus: Parameter overview.............................................39

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4 Installation and operating instructions • Wilo-Control EC-HVAC • Ed.01-SW: 3.02x/2023-03
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.
1.4 Exclusion from warranty and liabil-
ity
Wilo shall specifically not assume any warranty or liability in the following cases:
•Inadequate configuration due to inadequate or incorrect instructions by the operator or
the client
•Non-compliance with these instructions
•Improper use
•Incorrect storage or transport
•Incorrect installation or dismantling
•Insufficient maintenance
•Unauthorised repairs
•Inadequate construction site
•Chemical, electrical or electrochemical influences
•Wear
2 Safety This chapter contains basic information for the individual phases
of the life cycle. Failure to observe this information carries the
following risks:
•Risk of personal injury from electrical, electromagnetic or
mechanical influences
•Environmental damage from discharge of hazardous sub-
stances
•Damage to property
•Failure of important functions
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
These installation and operating instructions set out safety in-
structions for preventing personal injury and damage to property,
which are displayed in different ways:
•Safety instructions relating to personal injury start with a signal
word and are preceded by a corresponding symbol.

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Installation and operating instructions • Wilo-Control EC-HVAC • Ed.01-SW: 3.02x/2023-03 5
DANGER
Type and source of the danger!
Consequences of the danger and instructions for avoidance.
•Safety instructions relating to property damage start with a
signal word and are displayed without a symbol.
CAUTION
Type and source of the danger!
Consequences or information.
Signal words
•Danger!
Failure to observe safety instructions will result in serious injury
or death!
•Warning!
Failure to follow instructions can lead to (serious) injury!
•Caution!
Failure to follow instructions can lead to property damage and
possible total loss.
•Notice!
Useful information on handling the product
Markups
✓Prerequisite
1. Work step/list
⇒Notice/instructions
▶Result
Symbols
These instructions use the following symbols:
Danger caused by electric voltage
Useful information
2.2 Personnel qualifications •Personnel have been instructed on locally applicable regula-
tions governing accident prevention.
•Personnel have read and understood the installation and oper-
ating instructions.
•Electrical work: qualified electrician
Person with appropriate technical training, knowledge and ex-
perience who can identify and prevent electrical hazards.
•Installation/dismantling work: qualified electrician
Knowledge regarding tools and fixation material for various
structures
•Operation/control: Operating personnel, instructed in the func-
tioning of the complete system

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6 Installation and operating instructions • Wilo-Control EC-HVAC • Ed.01-SW: 3.02x/2023-03
2.3 Electrical work •Electrical work must be carried out by a qualified electrician.
•Before commencing work, disconnect the product from the
mains and safeguard it from being switched on again.
•Observe applicable local regulations when connecting to the
mains power supply.
•Adhere to the requirements of the local energy supply com-
pany.
•Earth the product.
•Observe technical information.
•Replace a defective connection cable immediately.
2.4 Monitoring devices Circuit breaker
The size and switching characteristics of the circuit breakers must
conform to the rated current of the connected consumer. Ob-
serve local regulations.
2.5 Installing/dismantling •Locally applicable laws and regulations on work safety and ac-
cident prevention must be complied with.
•Disconnect the product from the mains and secure it against
being switched on again.
•Suitable fixation material must be used for the existing bearing
surface.
•The product is not watertight. Select an appropriate installation
site!
•Do not deform the housing during installation. Seals could leak
and affect the stated IPprotection class.
•The product may not be installed in potentially explosive areas.
2.6 During operation •The product is not watertight. Comply with protection class
IP54.
•Ambient temperature: 0…40°C.
•Maximum humidity: 90%, non-condensing.
•Do not open the switchgear.
•The user must notify the person in charge of every fault or ir-
regularity immediately.
•In case of damage to the product or connection cable, switch
off the product immediately.
2.7 Maintenance tasks •Do not use any aggressive cleaners or scouring agents or fluids.
•The product is not watertight. Do not submerse the product in
fluids.
•Only carry out maintenance tasks mentioned in these installa-
tion 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.

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Installation and operating instructions • Wilo-Control EC-HVAC • Ed.01-SW: 3.02x/2023-03 7
2.8 Operator responsibilities •Provide installation and operating instructions in a language
which the personnel can understand.
•Make sure that the personnel has had the corresponding train-
ing for the specified work.
•Safety and information signs mounted on the device must al-
ways be legible.
•Train the personnel on how the system operates.
•Eliminate risk from electrical current.
•To ensure safe working practice, define personnel responsibilit-
ies.
Children and persons younger than 16years or with reduced
physical, sensory or mental capacities or limited experience are
prohibited from handling the product! A technician must super-
vise persons younger than 18years!
3 Intended use The switchgear is used for pressure-dependent control of 2 fixed-speed pumps and a top-
up valve in pressure maintenance systems.
The signal is acquired using a pressure sensor and float switch.
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 Structure
1
2
3
4
Fig.1: Switchgear front
1 Main switch
2 Operating button
3 LED indicators
4 LCD display
The front of the switchgear comprises the following main components:
•Main switch for switching the switchgear on/off
•Operating button for menu selection and parameter input
•LEDs for displaying the current operating state
•LCD display for showing the current operating data and individual menu items
The position of the individual operating elements is the same for the plastic and metal hous-
ing.
4.2 How it works The pumps are switched on/off individually and automatically depending on the actual
pressure in the system. The pressure is controlled via a two-position controller. When the
dry running level is reached, a visual signal is displayed and a forced switch-off of all the
pumps occurs. Faults are stored in the fault memory.
The top-up valve is controlled via the top-up float switch and the enable input (top-up).
The current operating data and operating conditions are shown on the LCD display and in-
dicated by LEDs. Operation and input of operating parameters is carried out using a rotary
knob.
4.3 Technical data Date of manufacture* See rating plate
Mains connection 1~230 V, 3~400 V
Mains frequency 50/60Hz
Max. current consumption per pump 12A

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8 Installation and operating instructions • Wilo-Control EC-HVAC • Ed.01-SW: 3.02x/2023-03
Max. rated power per pump 4kW
Pump activation type direct
Ambient/operating temperature 0…40°C
Storage temperature -30…+60°C
Max. relative humidity 90%, non-condensing
Protection class IP54
Electrical safety Pollution degree II
Control voltage 24 V =/~
Housing material UV-resistant polycarbonate
Details about the Hardware version (HW) and Software version (SW) can be found on the
rating plate!
*The date of manufacture is stated in accordance with ISO8601: JJJJWww
•JJJJ = year
•W = abbreviation for week
•ww = calendar week
4.4 Inputs and outputs Inputs
•Analogue input:
–1x pressure sensor 4…20mA
•Digital inputs:
–1x float switch used for sensing dry running level/low water level
–1x float switch used for detecting the top-up level
•Pump monitoring:
–1x input/pump for the thermal winding monitor using a bimetallic sensor
NOTICE!PTC sensors cannot be connected!
•Other inputs:
–1x External OFF: for remote deactivation of all pumps
–1x float switch/pressure switch/electrode for enabling the top-up process
Outputs
•Potential-free contacts:
–1x changeover contact for collective fault signals
–1x changeover contact for collective run signals
–1x NC contact for burner collective fault signals
–1x NC contact for common pump fault signals
–1x NO contact per pump for individual run signals
•Analogue output:
–1x 0–10V for output of the current pressure value
•Digital output:
–1x 24 VAC power output for controlling the top-up valve
4.5 Type key Example: Wilo-Control EC-H 2x12A-MT4-DOL-WM
EC Easy Control switchgear for fixed-speed pumps
H Control for HVAC systems
2x Max. number of pumps that can be connected
12A Max. rated current per pump in amperes
MT4 Mains connection:
M = alternating current (1~230 V)
T = three-phase current (3~)
4 = 400 V
DOL Pump activation type:
– DOL = direct on line
WM Wall mounting
4.6 Scope of delivery •Switchgear
•Installation and operating instructions
4.7 Accessories •Float switch for dry-running protection

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Installation and operating instructions • Wilo-Control EC-HVAC • Ed.01-SW: 3.02x/2023-03 9
•Pressure switch for dry-running protection
•Pressure sensor (4…20mA) for system control
•Float switch for top-up level
5 Transportation and storage
5.1 Delivery •After delivery, check product and packaging for defects (damage, completeness).
•Defects must be noted on the freight documentation.
•Defects must be notified to the transport company or the manufacturer on the day of
receipt of shipment. Claims cannot be asserted if the notification of defects takes place
at a later date.
5.2 Transport
CAUTION
Damage to property due to wet packaging!
Wet packaging may tear. If unprotected, the product may fall on the
ground and be irreparably damaged.
• Carefully lift wet packaging and replace it immediately!
•Clean switchgear.
•Close housing apertures, ensuring they are sealed watertight.
•Impact-resistant and watertight packaging.
5.3 Storage •Pack the switchgear in dustproof and watertight packaging.
•Maintain storage temperature: -30…+60°C, max. relative humidity: 90%, non-con-
densing.
•Frost-proof storage at a temperature of 10°C to 25°C with relative humidity of
40…50% is recommended.
•Avoid the formation of condensation at all times.
•All open threaded cable glands must be sealed to prevent water ingress into the hous-
ing.
•Attached cables should be protected against kinking, damage, and ingress of moisture.
•To prevent damage to the components, protect the switchgear from direct sunlight and
heat.
•Clean the switchgear after storage.
•If there has been water ingress or condensation has formed, have all the electronic com-
ponents tested for correct function. Contact customer service.
6 Installation and electrical con-
nection
•Check the switchgear for damage caused during transport. Do not install defective
switchgears!
•Observe the local guidelines for the design and operation of electronic controls.
•For setting the pressure control, observe the information on pressure limits and local
conditions.
6.1 Personnel qualifications •Electrical work: qualified electrician
Person with appropriate technical training, knowledge and experience who can identify
and prevent electrical hazards.
•Installation/dismantling work: qualified electrician
Knowledge regarding tools and fixation material for various structures
6.2 Installation types •Installation of the switchgear directly onto the pressure-boosting system
The switchgear is installed directly onto the pressure-boosting system at the factory.
6.3 Operator responsibilities •The installation location is clean, dry and free of vibration.
•The installation location is overflow-proof.
•The switchgear is not exposed to direct sunlight.
•Installation location outside of potentially explosive atmospheres.
6.4 Installation •The connection cable and required accessories should be provided by the customer.
•While laying the cable, ensure that there is no tension, no kinking and no pinching that
could damage the cable.
•Check the cable cross-section and length for the routing type chosen.
•Seal unused threaded cable glands.
•Ensure that the following ambient conditions are adhered to:

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10 Installation and operating instructions • Wilo-Control EC-HVAC • Ed.01-SW: 3.02x/2023-03
–Ambient/operating temperature: 0…40°C
–Relative humidity: 40…50%
–Max. relative humidity: 90%, non-condensing
6.4.1 Fixing instructions The switchgear is factory-mounted on the mounting bracket of a pressure-boosting sys-
tem.
6.5 Electrical connection
DANGER
Risk of fatal injury due to electrical current!
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 accord-
ance with the locally applicable regulations.
• If the product is disconnected from the mains, secure it against being
switched on again.
NOTICE
• Depending on the system impedance and the maximum connections/
hour of the connected consumers, voltage fluctuations and/or drops
may occur.
• When using shielded cables, attach the shielding to the earth rail on
one side of the switchgear!
• Always have connection carried out by a qualified electrician!
• Observe the installation and operating instructions for the connected
pumps and signal transmitters.
•The mains connection current and voltage must be as stated on the rating plate.
•Execute fuse protection on the mains side in accordance with the local guidelines.
•If circuit breakers are used, the switching characteristics should be selected according to
the connected pump.
•Follow local guidelines if residual-current devices (RCD, type A, sinusoidal current, uni-
versal-current-sensitive) are installed.
•Route connection cable in accordance with the local guidelines.
•Do not damage the connection cable during routing or installation.
•Earth the switchgear and all electrical consumers.

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Installation and operating instructions • Wilo-Control EC-HVAC • Ed.01-SW: 3.02x/2023-03 11
6.5.1 Overview of components
F1
F2
F3
1
2
3
4
5
6
7
8
9
1
0
1
1
1
2
1
3
1
4
1
5
1
6
1
7
1
8
1
9
2
0
2
1
2
2
2
3
2
4
2
5
2
6
2
7
2
8
2
9
3
0
3
1
3
2
3
3
3
4
3
5
3
6
3
7
3
8
3
9
4
0
4
1
4
2
4
3
4
4
4
5
4
6
4
7
4
8
4
9
5
0
5
1
5
2
5
3
5
4
T1
1
3
5
13
A1
2
4
6
14
A2
T2
T3
L1
L2
L3
NO
T1
1
3
5
13
A1
2
4
6
14
A2
T2
T3
L1
L2
L3
NO
GND
A(+)
B(-)
GND
LO
J4
J3
J2
HI
1
2
26
4
5
8
9
3
2
1
7
10
Fig.2: Interior view
1 Terminal strip: Mains connection
2 Mains voltage adjustment
3 Terminal strip: Earth (PE)
4 Terminal strip: Controls/sensors
5 Contactor combinations
7 Control board
8 Potentiometer for motor current monitoring
9 ModBus RTU: RS485 interface
10 ModBus RTU: Jumper for termination/polarisation
6.5.2 Mains connection
DANGER
Danger of death due to electrical current when the main switch
is switched off!
Even when the main switch is switched off, there is mains voltage power
to the voltage selection terminal.
• Make the voltage selection before connecting the product to the
mains.
CAUTION
Risk of property damage due to incorrectly set mains voltage!
If the wrong mains voltage is set, the switchgear will be destroyed. The
switchgear can be operated at different mains voltages. The mains
voltage is set to 400V at the factory.
• To use another mains voltage, change the position of the cable
jumper before connection.
NOTICE
The switchgear has integrated rotating field monitoring. If there is no
clockwise rotating field, error code “E006” appears on the display.
• Connect the switchgear to a clockwise rotating field.

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12 Installation and operating instructions • Wilo-Control EC-HVAC • Ed.01-SW: 3.02x/2023-03
NOTICE
For single-phase connection, error code “E006” is permanently displayed
if the rotating field monitoring has not been deactivated.
• Deactivate rotating field monitoring for single-phase connection in
menu5.68.
L1 L2
3~ 50/60 Hz
L
1~ 50/60 Hz
L3
N
400
230
com
1
2
3
Fig.3: Mains connection
1 Terminal strip: Mains connection
2 Mains voltage adjustment
3 Terminal strip: Earth (PE)
•Insert the connection cables laid by the customer through the threaded cable glands and
secure.
•Connect the wires to the terminal strip according to the connection diagram.
Mains connection 1~230V:
•Cable: 3-core
•Wire: L, N, PE
•Mains voltage adjustment: Converter bridge 230/COM
Mains connection 3~400V:
•Cable: 4-core
•Wire: L1, L2, L3, PE
•Mains voltage adjustment: Converter bridge 400/COM (factory setting)
6.5.3 Pump mains connection
NOTICE
Power supply and pump connection rotating field
The rotating field is routed from the mains connection directly to the
pump connection.
• Check the required rotating field of the pumps to be connected
(clockwise or counter-clockwise).
• Observe the installation and operating instructions of the pumps.
T1
1 3 5 13 A1
2 4 6 14 A2
T2 T3
L1 L2 L3 NO
M
3~
L1 L2 L3
5
3
M
1~
L
N
Fig.4: Pump connection
3 Terminal strip: Earth (PE)
5 Contactor
•Insert the connection cables laid by the customer through the threaded cable glands and
secure.
•Connect the wires to the contactor as per the connection diagram.
6.5.4 Connection, thermal motor monit-
oring CAUTION
Property damage due to external voltage!
An external voltage which is applied destroys the component.
• Do not apply external voltage.

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Installation and operating instructions • Wilo-Control EC-HVAC • Ed.01-SW: 3.02x/2023-03 13
x
Fig.5: Connection overview symbol
One bimetallic sensor thermal motor monitoring device can be connected to each connected
pump.
•Do not connect PTC or Pt100 sensors.
•Insert the connection cables laid by the customer through the threaded cable glands and
secure.
•Connect the wires to the terminal strip according to the connection diagram.
•Use the terminal number shown in the connection overview on the cover.
The number shown in location “x” on the symbol indicates which pump it refers to:
•1 = pump1
•2 = pump2
6.5.5 Pressure sensor connection
CAUTION
Property damage due to external voltage!
An external voltage which is applied destroys the component.
• Do not apply external voltage.
4-20 mA
In
p
Fig.6: Connection overview symbol
Pressure detection is performed using an analogue pressure sensor (4…20mA).
NOTICE!Do not use an active pressure sensor.
•Only use shielded connection cables.
•Insert the connection cables laid by the customer through the threaded cable glands and
secure.
•Apply the shielding on one side.
•Observe the correct polarity of the pressure sensor.
•Connect the wires to the terminal strip according to the connection diagram.
•Use the terminal number shown in the connection overview on the switchgear cover.
6.5.6 Connection to the dry-running
(low water level) protection CAUTION
Property damage due to external voltage!
An external voltage which is applied destroys the component.
• Do not apply external voltage.
!
Fig.7: Connection overview symbol
The low water level (dry-running protection) can be monitored with a potential-free contact:
•Contact open: dry run
•Contact closed: no dry run
The terminals are fitted with a converter bridge at the factory.
•Insert the connection cables laid by the customer through the threaded cable glands and
secure.
•Remove the converter bridge and connect the wires to the terminal strip according to the
connection diagram.
•Use the terminal number shown in the connection overview on the switchgear cover.
6.5.7 Top-up level connection
CAUTION
Property damage due to external voltage!
An external voltage which is applied destroys the component.
• Do not apply external voltage.

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14 Installation and operating instructions • Wilo-Control EC-HVAC • Ed.01-SW: 3.02x/2023-03
Fig.8: Connection overview symbol
The level for the top-up process can be monitored with a potential-free contact:
•Contact open: Top-up process
•Contact closed: no top-up process
To enable the top-up process, the “Enabling the top-up process” input must also be closed.
•Insert the connection cables laid by the customer through the threaded cable glands and
secure.
•Remove the converter bridge and connect the wires to the terminal strip according to the
connection diagram.
•Use the terminal number shown in the connection overview on the switchgear cover.
6.5.8 “Extern OFF” connection: Remote
deactivation CAUTION
Property damage due to external voltage!
An external voltage which is applied destroys the component.
• Do not apply external voltage.
Fig.9: Connection overview symbol
A potential-free contact can be used to remotely deactivate all pumps and the top-up valve:
•Contact closed: Pumps and valve enabled
•Contact open: All pumps and valve deactivated– the display shows the “Extern OFF”
symbol.
The terminals are fitted with a converter bridge at the factory.
NOTICE!Remote deactivation is prioritised. All pumps are deactivated regardless of their
current pressure value. The pumps cannot be operated in manual mode!
•Insert the connection cables laid by the customer through the threaded cable glands and
secure.
•Remove the converter bridge and connect the wires to the terminal strip according to the
connection diagram.
•Use the terminal number shown in the connection overview on the switchgear cover.
6.5.9 Connection to enable the top-up
process: Remote deactivation CAUTION
Property damage due to external voltage!
An external voltage which is applied destroys the component.
• Do not apply external voltage.
Fig.10: Connection overview symbol
A potential-free contact can be used to remotely deactivate the top-up process:
•Contact closed: Top-up process enabled
•Contact open: Top-up process not possible, or the current process is aborted.
The terminals are fitted with a converter bridge at the factory.
NOTICE!Remote deactivation is prioritised. The top-up process is switched off regardless
of the current state of the float switch. The valve cannot be operated in manual mode!
•Insert the connection cables laid by the customer through the threaded cable glands and
secure.
•Remove the converter bridge and connect the wires to the terminal strip according to the
connection diagram.
•Use the terminal number shown in the connection overview on the switchgear cover.

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Installation and operating instructions • Wilo-Control EC-HVAC • Ed.01-SW: 3.02x/2023-03 15
6.5.10 Collective run signal (SBM) con-
nection DANGER
Danger of death due to electrical current!
The external electrical power supply is also present at the terminals when
the main switch is switched off!
• Disconnect the external power supply before any work.
• Electrical work must be carried out by a qualified electrician.
• Observe local regulations.
Fig.11: Connection overview symbol
A run signal is issued for all pumps (SBM) via a separate output:
•Contact type: potential-free changeover contact
•Contact load:
–Minimum: 12V=, 10mA
–Maximum: 250V~, 1A
•Insert the connection cables laid by the customer through the threaded cable glands and
secure.
•Connect the wires to the terminal strip according to the connection diagram.
•Use the terminal number shown in the connection overview on the switchgear cover.
6.5.11 Collective fault signal connection
(SSM) DANGER
Danger of death due to electrical current!
The external electrical power supply is also present at the terminals when
the main switch is switched off!
• Disconnect the external power supply before any work.
• Electrical work must be carried out by a qualified electrician.
• Observe local regulations.
Fig.12: Connection overview symbol
A fault message is output for all pumps (SSM) via a separate output:
•Contact type: potential-free changeover contact
•Contact load:
–Minimum: 12V=, 10mA
–Maximum: 250V~ 1A
•Insert the connection cables laid by the customer through the threaded cable glands and
secure.
•Connect the wires to the terminal strip according to the connection diagram.
•Use the terminal number shown in the connection overview on the switchgear cover.
6.5.12 Burner collective fault signal con-
nection (B-SSM) DANGER
Danger of death due to electrical current!
The external electrical power supply is also present at the terminals when
the main switch is switched off!
• Disconnect the external power supply before any work.
• Electrical work must be carried out by a qualified electrician.
• Observe local regulations.

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16 Installation and operating instructions • Wilo-Control EC-HVAC • Ed.01-SW: 3.02x/2023-03
B
Fig.13: Connection overview symbol
A fault message for a burner control unit (B-SSM) is output via a separate output. The B-SSM
contact is switched in the event of dry running, underpressure, overpressure and sensor er-
ror:
•Contact type: potential-free NC contact
•Contact load:
–Minimum: 12V=, 10mA
–Maximum: 250V~ 1A
•Insert the connection cables laid by the customer through the threaded cable glands and
secure.
•Connect the wires to the terminal strip according to the connection diagram.
•Use the terminal number shown in the connection overview on the switchgear cover.
6.5.13 Individual run signal (EBM) connec-
tion DANGER
Danger of death due to electrical current!
The external electrical power supply is also present at the terminals when
the main switch is switched off!
• Disconnect the external power supply before any work.
• Electrical work must be carried out by a qualified electrician.
• Observe local regulations.
x
Fig.14: Connection overview symbol
A run signal is output for each pump (EBM) via a separate output:
•Contact type: potential-free NO contact
•Contact load:
–Minimum: 12V=, 10mA
–Maximum: 250V~, 1A
•Insert the connection cables laid by the customer through the threaded cable glands and
secure.
•Connect the wires to the terminal strip according to the connection diagram.
•Use the terminal number shown in the connection overview on the switchgear cover.
The number shown in location “x” on the symbol indicates which pump it refers to:
•1 = pump1
•2 = pump2
6.5.14 Combined pump fault signal con-
nection (ESM pump 1/2) DANGER
Danger of death due to electrical current!
The external electrical power supply is also present at the terminals when
the main switch is switched off!
• Disconnect the external power supply before any work.
• Electrical work must be carried out by a qualified electrician.
• Observe local regulations.
1/2
Fig.15: Connection overview symbol
A combined fault message (PSM) is issued via a separate output if one or both pumps have a
fault:
•Contact type: potential-free NC contact
•Contact load:
–Minimum: 12V=, 10mA
–Maximum: 250V~, 1A
•Insert the connection cables laid by the customer through the threaded cable glands and
secure.
•Connect the wires to the terminal strip according to the connection diagram.
•Use the terminal number shown in the connection overview on the switchgear cover.

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Installation and operating instructions • Wilo-Control EC-HVAC • Ed.01-SW: 3.02x/2023-03 17
7 Operation
DANGER
Danger of death due to electrical current!
There is danger of death from open switchgear.
• Only operate the switchgear when closed.
• Electrical work on the internal components must be carried out by a
qualified electrician.
7.1 How it works
7.1.1 Normal operation
p
Q
3
2
Fig.16: Functional diagram
2 Activation threshold
3 Deactivation threshold for base-load pump
An electronic pressure sensor (set measurement range: menu5.11) supplies the actual pres-
sure value as a 4…20mA signal. The system works as a two-position controller and keeps
the actual pressure value in the range between the activation and deactivation thresholds
(menu1.04 and 1.07).
•Set the activation and deactivation thresholds relative to the reference setpoint
(menu1.01).
If there is no “External Off” message, no fault and the drives are activated (menu3.01), the
base-load pump starts as soon as the value falls below the activation threshold (Item2)
(menu1.04). If there are 2 pumps in the system, the standby pump mode is always active so
that only one pump can run. Operation with base-load and peak-load pump is not intended.
If the demand drops and the deactivation threshold Item3 is exceeded, the base-load pump
(menu1.07) switches off after the delay time (menu1.09) has elapsed.
The top-up function works independently of the pump control. A float switch with normally
open contact signals the water level. If there is enough water in the tank, the contact is
closed. If the water level drops, the contact opens. The switchgear opens the top-up valve
when the enable input and the “External Off” input are closed and the drives are activated.
The switchgear monitors the duration, frequency and time interval of the top-up processes.
An alarm is triggered and the running pumps are switched off if:
•the opening time of the top-up valve (menu5.80) is exceeded.
•top-up processes occur over a longer period of time with a time interval of ≤6minutes.
The top-up valve remains closed.
The intervals are listed in the table below:
Interval between two top-up processes
[min]
Delay until alarm [min]
>6 Continuous normal operation
≤6 60
≤5 45
≤4 25
≤3 15
7.1.2 Pump cycling The base-load pump is regularly switched in order to prevent irregular running times of the
individual pumps. When all pumps are switched off, the base-load pump will change the
next time the system is activated.
Additionally, repeated pump cycling is activated as a factory setting. This causes the base-
load pump to be switched every 6 hours. NOTICE!To deactivate this function: Menu 5.60!
7.1.3 Pump kick (cyclical test run) To avoid longer periods of standstill for the activated pumps, a cyclical test run (pump kick
function) is provided as a factory setting. NOTICE!To deactivate this function: Menu 5.40!
Observe the following points for this function:
•Menu5.41: Pump kick permitted in “Extern OFF”
Start test run when the pumps are switched off using “Extern OFF”?

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18 Installation and operating instructions • Wilo-Control EC-HVAC • Ed.01-SW: 3.02x/2023-03
•Menu5.42: Pump kick interval
Time interval after which a test run takes place. NOTICE!The time interval will start
when all pumps are switched off!
•Menu5.43: Pump kick running time
Pump running time during the test run
7.1.4 Standby pump If there are 2 pumps, the standby pump mode is automatically activated. The standby pump
is not activated during normal operation. The standby pump is only activated in the event
of pump failure due to a fault. The standby pump is subject to standstill monitoring. The
standby pump is also activated during pump replacement and pump kick.
7.1.5 Operation with a defective pres-
sure sensor
If the pressure sensor does not transfer a measured value (e.g. due to a wire break or de-
fective sensor), all pumps are switched off.
Emergency operation
To ensure water supply in the event of a fault, emergency operation can be activated:
•Menu 5.45
•Number of active pumps
•The pumps are uncontrolled during emergency operation.
7.1.6 Low water/dry-running protection The water level in the break tank can be monitored using a pressure or float switch and re-
ported to the switchgear. Observe the following points:
•Contact type: NC contact
•Low water: The pumps are switched off after the delay time has elapsed (menu5.62).
NOTICE!If the contact is closed again during the delay time, deactivation will not oc-
cur.
•Reactivation: When the contact is closed again and the delay time has elapsed (10s), the
system will start automatically.
NOTICE!The fault will be automatically resolved. The error can be called up in the
fault memory.
7.2 Menu control
Fig.17: Operating button function
The menu is controlled via the operating button:
•Turn: Menu selection or settings values.
•Press: Change menu level, confirm error number or value.
7.3 Menu type: Main menu or Easy Ac-
tions menu
There are two different menus.
•Main menu: Access to all settings for a complete configuration.
•Easy Actions menu: Quick access to certain functions.
Observe the following points when using the Easy Actions menu:
–The Easy Actions menu only offers access to the selected functions. It is not possible
to perform a complete configuration with this.
–Perform an initial configuration to use the Easy Actions menu.
–The Easy Actions menu is enabled at the factory. Note, the Easy Actions menu can be
disabled in menu 7.06.
7.4 Call up the menu Call up the main menu
1. Press operating button for 3seconds.
▶Menu item 1.00 appears.
Call up the Easy Actions menu
1. Turn operating button 180°.
⇒The “Resetting error messages” or “Manual operation pump 1” function appears
2. Turn operating button an additional 180°.
▶The other functions are shown. The main screen appears at the end.
7.5 Quick access to “Easy Actions” The following functions can be called up using the Easy Actions menu:

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Installation and operating instructions • Wilo-Control EC-HVAC • Ed.01-SW: 3.02x/2023-03 19
Reset the current error message
NOTICE!Menu item is only shown when an error is present.
Manual operation pump 1
Corresponds to the value “Hand” in menu3.02.
If the operating button is pressed, pump 1 runs for 15seconds.
After 15seconds, the last set operating mode is active again.
Manual operation pump 2
Corresponds to the value “Hand” in menu3.03.
If the operating button is pressed, pump 1 runs for 15seconds.
After 15seconds, the last set operating mode is active again.
Pump 1 deactivated.
Corresponds to the “off” value in menu3.02.
Pump 2 deactivated.
Corresponds to the “off” value in menu3.03.
Automatic mode, pump 1
Corresponds to the “Auto” value in menu3.02.
Automatic mode, pump 2
Corresponds to the “Auto” value in menu3.03.
Top-up valve open
Corresponds to the value “Open” in menu3.06.
When the drives are activated and the enable input and External Off are
closed, the top-up valve is opened. The top-up valve remains open un-
til the mode is changed to “Shut” or “Auto”.
NOTICE!The manual top-up process must be monitored. When fin-
ished, set the top-up valve to “Auto” or “Shut” mode.
Close top-up valve
Corresponds to the “Shut” value in menu3.06.
The valve remains closed regardless of the fill level.
Automatic mode top-up valve
Corresponds to the “Auto” value in menu3.06.
7.6 Factory settings To reset the switchgear to the factory settings, contact customer service.
8 Commissioning
8.1 Operator responsibilities
NOTICE
Observe additional documentation
• Carry out the commissioning measures in accordance with the install-
ation and operating instructions for the overall system.
• Observe the installation and operating instructions for the connected
products (sensors and pumps) as well as the system documentation.
•Provide installation and operating instructions at the switchgear or at a place specially
reserved for it.
•Make the installation and operating instructions available in a language the personnel
can understand.
•Make sure that the installation and operating instructions have been read and under-
stood by all personnel.
•The installation site of the switchgear is overflow-proof.
•The switchgear is properly fused and earthed.
•Safety devices and precautions (incl. emergency off) for the entire system are switched
on and have been checked for problem-free operation.

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20 Installation and operating instructions • Wilo-Control EC-HVAC • Ed.01-SW: 3.02x/2023-03
•The switchgear is suitable for use under the specified operating conditions.
8.2 Activating the switchgear
NOTICE
Error message during operation with alternating current con-
nection
The switchgear has a rotating field monitor and motor current monitor.
The rotating field monitoring only works fault-free at the three-phase
connection and is activated at the factory. If the switchgear is used for an
alternating current connection, the following error messages are shown
in the display:
• Rotating field monitoring: Error code “E006”
– To switch off rotating field monitoring: Select “off” in menu5.68.
• Motor current monitoring: Error code “E080.x”
– Set the potentiometer for the nominal pump current correctly (see
Adjust motor current monitoring [”28]).
▶Three-phase current monitoring is deactivated and motor current
is set. The switchgear now functions without problems when us-
ing an alternating current connection.
NOTICE
Observe the error code on the display
If the red fault LED lights up or flashes, observe the error code on the dis-
play! If the error has been confirmed, the previous error will be stored in
menu 6.02.
Following a power failure, the switchgear will automatically start up in the last operating
mode set.
1
2
3
65
4
Fig.18: Start screen
1 Current pump status:
– Number of registered pumps
– Pump activated/deactivated
– Pumps On/Off
2 Fieldbus active
3 Actual pressure value
4 Control mode (e.g. p-c)
5 Standby pump function activated
6 Top-up valve status (0: closed; 1: open)
✓Switchgear is closed.
✓Installation has been performed correctly.
✓All signal transmitters and consumers are connected and installed in the operating
space.
✓If a low-water cut-out switchgear (dry-running protection) is available, the switching
point has been correctly set.
✓Motor protection is preset according to the pump data.
1. Turn the main switch to the “ON” position.
2. Switchgear starts.
– All LEDs light up for 2s.
– The display illuminates and the start screen appears.
– The standby symbol appears in the display.
▶The switchgear is ready for operation. Start the initial configuration or automatic
mode.
8.3 Start initial configuration Set the following parameters during initial configuration:
•Enable parameter input.