Tech Controllers EU-ML-12 User manual

EU-ML-12

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TABLE OF CONTENTS
I. Safety ..................................................................................................................................................................................5
II. System description..............................................................................................................................................................6
III. Installing the Controller..................................................................................................................................................6
IV. First startup ..................................................................................................................................................................13
V. Main screen description ...................................................................................................................................................14
VI. Controller functions......................................................................................................................................................16
1. Operation mode ...........................................................................................................................................................16
2. Zones ............................................................................................................................................................................16
2.1. ON........................................................................................................................................................................16
2.2. Set temperature ..................................................................................................................................................16
2.3. Operation mode ..................................................................................................................................................17
3. Controller settings........................................................................................................................................................18
3.1. Time settings........................................................................................................................................................18
3.2. Screen settings.....................................................................................................................................................18
3.3. Button sounds......................................................................................................................................................18
4. Fitter’s Menu ................................................................................................................................................................18
4.1. Zones ...................................................................................................................................................................19
4.1.1. Room Sensor...............................................................................................................................................19
4.1.2. Set temperature..........................................................................................................................................19
4.1.3. Operation mode..........................................................................................................................................19
4.1.4. Outputs configuration.................................................................................................................................19
4.1.5. Settings .......................................................................................................................................................20
4.1.6. Actuators.....................................................................................................................................................21
4.1.7. Window Sensors .........................................................................................................................................22
4.1.8. Floor heating...............................................................................................................................................22
4.2. Additional contacts..............................................................................................................................................23
4.3. Mixing valve.........................................................................................................................................................24
4.4. Master module ....................................................................................................................................................30
4.5. Repeater Function ...............................................................................................................................................30
4.6. Internet module...................................................................................................................................................31
4.7. Manual mode.......................................................................................................................................................31
4.8. External sensor ....................................................................................................................................................31
4.9. Heating stopping..................................................................................................................................................32
4.10. Voltage-free contact........................................................................................................................................32
4.11. Pump ...............................................................................................................................................................33
4.12. Heating - cooling .............................................................................................................................................33
4.13. Anti-stop settings ............................................................................................................................................33

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4.14. Maximum humidity .........................................................................................................................................33
4.15. Heat pump.......................................................................................................................................................34
4.16. Language .........................................................................................................................................................34
4.17. Factory settings ...............................................................................................................................................34
5. Service menu............................................................................................................................................................34
6. Factory settings........................................................................................................................................................34
7. Software version ......................................................................................................................................................34
VII. Alarm list........................................................................................................................................................................35
VIII. Software update............................................................................................................................................................37
IX. Technical data................................................................................................................................................................37
Images and diagrams contained in the document serve illustrative purposes only.
The manufacturer reserves the right to introduce changes.

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I. SAFETY
Before operating the device, please read the following instructions carefully. Failure to observe the instructions may cause
personal injuries and damage the device. To avoid unnecessary errors and accidents, make sure that all persons operating
the device have thoroughly familiarized themselves with the device operation and its safety functions. Please do not discard
the manual and please make sure that it remains with the device when it is transferred. As far as safety of human life, health,
and property is concerned, please observe the precautions listed in the operating manual, as the manufacturer will not be
liable for any damages caused by negligence.
WARNING
•Live electric equipment. Before carrying out any operations related to the power supply (connecting cables,
installing the device, etc.), make sure that the device is not connected to the mains.
•Installation should be carried out by a person holding appropriate electrical qualifications.
•Before starting the controller, the ground resistance of electric motors and the insulation resistance of electric wires
should be measured.
•The device is not intended for use by children.
CAUTION
•Atmospheric discharges can damage the controller, so during a thunderstorm, switch it off by unplugging the mains
plug.
•The controller may not be used contrary to its intended purpose.
•Before and during the heating season, check the technical condition of the cables, and check the installation of the
controller, also clean it of dust and other soiling.
There could be changes introduced in the products listed in the present manual, following its last revision of 21.03.2023. The
manufacturer reserves the right to introduce changes in design or deviations from the established colours. Illustrations may
contain optional equipment. Printing technology may affect differences in the presented colours.
Care for the natural environment is of paramount importance to us. The awareness that we
manufacture electronic devices is linked with our obligation to dispose the used electronic parts
and devices in a way that is safe for the environment. Therefore, the company requested and
received a registration number issued by the Polish Chief Inspector for Environmental Protection.
The symbol of the crossed wheeled bin on the product indicates that the product must not be
disposed of with municipal waste. By segregating waste for recycling, we help protect the
environment. It remains the user's responsibility to hand over used equipment to a designated
collection point for recycling electrical and electronic equipment waste.

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II. SYSTEM DESCRIPTION
The EU-ML-12 additional controller is a part of heating control system that enables expansion of the existing installation with
additional zones. It has RS 485 and wireless communication. Its primary function is to maintain the preset temperature in
each zone. The EU-ML-12 is a device that, together with all peripheral devices (room sensors, room controllers, floor sensors,
external sensor, window sensors, thermostatic actuators, signal enhancers), forms the entire integrated system.
Through its extensive software, the EU-ML-12 control board can perform a number of functions:
•controlling for dedicated wired regulators: EU-R-12b, EU-R-12s, EU-F-12b and EU-R-X
•controlling wireless regulators: EU-R-8X, EU-R-8b, EU-R-8b Plus, EU-R-8s Plus, EU-F-8z or sensors: EU-C-8r, EU-C-mini,
EU-CL-mini
•controlling for external sensors and weather control (after registering the sensor in EU-L-12)
•controlling for wireless window sensors (up to 6 pcs per zone)
•possibility to control STT-868, STT-869 or EU-G-X wireless actuators (6 pcs per zone)
•possibility of operating thermostatic actuators
•possibility of operating mixing valves –after connecting the EU-i-1, EU-i-1m valve module
•control of the installed heating or cooling device by means of voltage-free contact
•enabling one 230V output to pump
•possibility to set individual operating schedules for every zone
•possibility of updating the software via its USB port
III. INSTALLING THE CONTROLLER
The EU-ML-12 control board should only be installed by a properly qualified person.
CAUTION
You can only connect 4 EU-ML-12 boards in series to the EU-L-12 main board.
WARNING
Danger of injury or death due to electric shock on live connections. Before working on the controller, disconnect
its power supply and secure it against accidental switching on.
CAUTION
Incorrect wiring may damage the controller.

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Installation of electrolytic capacitors
In order to reduce the phenomenon of temperature spikes being read from the zone sensor, a 220uF/25V low impedance
electrolytic capacitor, connected in parallel with the sensor cable, should be installed. When installing the capacitor, always
pay particular attention to its polarity. The ground of the element marked with a white strip is screwed into the right terminal
of the sensor connector - as seen from the front of the controller, and depicted in attached illustrations. The second terminal
of the capacitor is screwed into the terminal of the left connector. We found that this solution has completely eliminated the
existing distortions. However, it is worth noting that the basic principle is to correctly install the wires in order to avoid
interference. The wire should not be routed near sources of electromagnetic field. If such a situation has already occurred, a
filter in the form of a capacitor is necessary.
An illustrative diagram explaining how to connect and communicate with the remaining equipment:
CAUTION
If the EU-WiFi RS, EU-505 or EU-WiFi L Internet module is connected to the EU-ML-12, then the emodul.eu
application will display only the zones of the respective EU-ML-12 controller. If such a module is connected to
the main EU-L-12 controller, the application will display all zones of the entire system.
EU-ML-12
Low impedance 220uF/25V
electrolytic capacitor

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In the case of wired connection between devices: controllers (EU-L-12 and EU-ML-12), room controllers and panel,
terminating resistors (jumpers) should be used at the beginning and end of each transmission line. The controller has a
built-in terminating resistor, which should be set in the appropriate position:
•A, B –terminating resistor on (first and last controller)
•B, X –neutral (factory settings) position.
CAUTION
The order of the controllers in the case of terminating connection does not matter.
Connection between controllers

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When connecting room controllers to the first controller, the jumpers on the controller and on the last of the room
controllers are switched to the ON position.
If the room controllers are connected to a controller located in the middle of the transmission line, the jumpers to the
first and last controllers are switched to the ON position.
Connection between the controller and the room controllers

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CAUTION
The panel should be connected to the first or last controller due to the fact that the panel cannot be equipped
with a terminating resistor.
CAUTION
If the panel is connected to the EU-ML-12, then this controller must be connected to the main EU-L-12
controller, and this panel must be registered in the following way: Menu → Fitter’s menu → Control panel →
Device type. The panel can be registered as a wired or wireless device, depending on the type of assembly.
Click Register option on the EU-M-12 panel screen.
Connection between the controller and the panel

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IV. FIRST STARTUP
In order for the controller to operate correctly, the following steps must be followed for the first start-up:
Step 1: Connect the EU-ML-12 mounting controller with all devices to be controlled
To connect the wires, remove the controller cover and then connect the wiring –this should be done as described on the
connectors and the diagrams in the manual.
Step 2. Switch on the power supply, checking the operation of the connected devices
After connecting all devices, switch on the power supply of the controller.
Using the Manual mode function (Menu → Fitter’s menu → Manual mode), check the operation of the individual devices.
Using the and buttons, select the device and press the MENU button –the device to be checked should switch on.
Check all the connected devices in this manner.
Step 3. Set the current time and date
To set the current date and time, select: Menu → Controller settings → Time settings.
CAUTION
If you are using the EU-505, EU-WiFi RS or EU-WiFi L module, the current time can be downloaded from the
network automatically.
Step 4. Configure temperature sensors, room controllers
In order for the EU-ML-12 controller to support a given zone, it must receive information about the current temperature.
The simplest way is to use a wired or wireless temperature sensor (e.g. EU-C-7p, EU-C-mini, EU-CL-mini, EU-C-8r). However,
if you wish to be able to change the set temperature value directly from the zone, you can use either room controllers:
e.g. EU-R-8b, EU-R-8z, EU-R-8b Plus or dedicated controllers: EU-R-12b, EU-R-12s, EU-F-12b, EU-R-X. To pair a sensor with
the controller, select: Menu → Fitter's menu → Zones →Zone… → Room sensor → Select sensor.
Step 5. Configure the EU-M-12 control panel and the EU-ML-12 add-on modules
The EU-ML-12 controller can utilize the EU-M-12 control panel, which performs a master function - through it, you can
change the set temperatures in the zones, and designate local and global weekly schedules, etc.
Only one control panel of this type may be installed in the installation, which must be registered in the main EU-L-12
controller: Menu → Fitter's menu → Control panel in order for the panel to display data on the zones operated by the
slave ML-12 controller, this controller must be connected to the master L-12 controller, where the control panel is
registered.
In order to expand the number of supported zones in the installation (max, 4 additional modules), each EU-ML-12
controller should be separately registered in the main EU-L-12 controller by selecting: Menu → Fitter's menu → Additional
modules → Module 1..4.
Step 6. Configure the remaining cooperating devices
The EU-ML-12 controller can also work with the following devices:
- EU-505, EU-WiFi RS or EU-WiFi L Internet modules (the emodul.eu application will display only zones supported by the
EU-ML-12 controller).
After connecting the Internet module, the user has the possibility to control the installation via the Internet and the
emodul.eu app. For configuration details, refer to the manual of the respective module.
- EU-i-1, EU-i-1m mixing valve modules
- additional contacts, e.g. EU-MW-1 (6 pcs per controller)

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CAUTION
If the user wants to use these devices during operation, they must be connected and/or registered.
V. MAIN SCREEN DESCRIPTION
The control is carried out by means of buttons located under the display.
1. Controller display.
2. MENU button - enters the controller menu, confirming the settings.
3. button - used to browse the menu functions, decrease the value of the edited parameters. This button also
switches the operation parameters between the zones.
4. button - used to browse the menu functions, increase the value of the edited parameters. This button
also switches the operation parameters between the zones.
5. EXIT button - EXIT from the controller menu, cancel the settings, toggle the screen view (zones, zone).
1. Current day of the week
2. Outside temperature
3. Pump running
Sample screens - ZONES
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5
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2
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3
4
6
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9
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4. Activated voltage-free contact
5. Current time
6. Information about the operating mode/schedule in the respective zone
L
local schedule
CON
constant temperature
G-1….G-5
global schedule 1-5
02:08
time-limited
7. Signal strength and battery status of the room sensor information
8. Pre-set temperature in a given zone
9. Current floor temperature
10. Current temperature in a given zone
the zone is overheated
the zone is cooled
11. Zone information. A visible digit means a registered room sensor that provides information about the current
temperature in the respective zone. If the zone is currently heating or cooling, depending on the mode, the digit
flashes. If an alarm occurs in a given zone, an exclamation mark will be displayed instead of a digit.
To view the current operating parameters of a specific zone, highlight its number using the buttons.
1. Outside temperature
2. Battery status
3. Current time
4. Current mode of operation of the displayed zone
5. The preset temperature of the given zone
6. Current temperature of the given zone
7. Current floor temperature
8. Maximum floor temperature
9. Information on the number of registered window sensors in the
zone
10. Information about the number of registered actuators in the
zone
11. Icon of the currently displayed zone
12. Current humidity level in the given zone
13. Zone name
the zone is overheated
the zone is cooled
Sample Screen - ZONE
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9
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VI. CONTROLLER FUNCTIONS
1. OPERATION MODE
This function enables activation of the selected operating mode.
➢Normal mode –the preset temperature depends on the set schedule
➢Holiday mode –the set temperature depends on the settings of this mode
Menu → Fitter's menu → Zones → Zone… → Settings → Temperature settings > Holiday mode
➢Economy mode –the set temperature depends on the settings of this mode
Menu → Fitter's menu → Zones → Zone… → Settings → Temperature settings > Economy mode
➢Comfort mode –the set temperature depends on the settings of this mode
Menu → Fitter's menu → Zones → Zone… → Settings → Temperature settings > Comfort mode
CAUTION
•Changing the mode to holiday, economy and comfort will apply to all zones. It is only possible to edit the setpoint
temperature of the selected mode for a particular zone.
•In operation mode other than normal, it is not possible to change the set temperature from the room controller
level.
2. ZONES
2.1. ON
To display the zone as active on the screen, register a sensor in it (see: Fitter's Menu). The function allows you to disable the
zone and hide the parameters from the main screen.
2.2. SET TEMPERATURE
The set temperature in the zone results from the settings of a specific mode of operation in the zone, i.e. the weekly schedule.
However, it is possible to switch off the schedule and set a separate temperature and duration of this temperature. After this
time, the set temperature in the zone will depend on the previously set mode. On an ongoing basis, the set temperature
value, along with the time until the end of its validity, is displayed on the main screen.
CAUTION
In the event that the duration of a specific setpoint temperature is set to CON, this temperature will be valid for an
indefinite period (constant temperature).
Menu Operation mode
Zones
Controller settings
Fitter's Menu
Service menu
Factory settings
Software version

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2.3. OPERATION MODE
The user has the ability to view and edit the operating mode settings for the zone.
•Local Schedule –Schedule settings that only apply to this zone
•Global Schedule 1-5 –These schedule settings apply to all zones, where they are active
•Constant temperature (CON) - the function allows you to set a separate set temperature value, which will be valid
in a given zone permanently, regardless of the time of day
•Time limit –the function allows you to set a separate temperature, which will be valid only for a specific period of
time. After this time, the temperature will result from the previously applicable mode (schedule or constant without
time limit).
Menu → Zones → Zone… → Operation mode → Schedule… → Edit
1. Days on which the above settings apply
2. Temperature set outside the time intervals
3. Set temperatures for time intervals
4. Time intervals
To configure a schedule:
•Use the arrows to select the part of the week for which the set schedule will apply (1st part of the
week or 2nd part of week)
•Use the MENU button to go to the set temperature settings, which will apply outside the time intervals - set it
using the arrows, confirm using the MENU button
•Use the MENU button to go to the settings of the time intervals and the set temperature that will apply to the
specified time interval, set it using the arrows, confirm with the MENU button
•Then proceed to the editing of the days that are to be assigned to 1st or 2nd part of the week, active days are
displayed in white. The settings are confirmed with the MENU button, the arrows navigate between each day.
Schedule editing
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3
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After setting the schedule for all the days of the week, press the EXIT button and select the Confirm option with the MENU
button.
CAUTION
The users can set three different time intervals in a given schedule (with an accuracy of 15 minutes).
3. CONTROLLER SETTINGS
3.1. TIME SETTINGS
The current time and date can be automatically downloaded from the network if the Internet module is connected and the
automatic mode is enabled. It is also possible for the user to manually set the time and date if the automatic mode does not
operate correctly.
3.2. SCREEN SETTINGS
This function allows users to customize the display.
3.3. BUTTON SOUNDS
This option is used to enable the sound that will accompany button pressing.
4. FITTER’S MENU
The Fitter's menu is the most complex controller menu, here, users have a wide selection of functions that allow for maximum
use of the controller's capabilities.
Fitter's
Menu
Zones
Additional contacts
Mixing valve
Master module
Repeater Function
Internet module
Manual mode
External sensor
Heating stopping
Voltage-free contact
Pump
Heating - cooling
Anti-stop settings
Max. humidity
Language
Heat pump
Factory settings

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4.1. ZONES
In order for a given zone to be active on the controller display, a sensor must be registered in it.
4.1.1. ROOM SENSOR
Users can register/enable any type of sensor: NTC wired, RS or wireless.
➢Hysteresis - adds a tolerance for the room temperature in the range of 0.1 ÷ 5°C, at which there is additional
heating/cooling enabled.
Example:
The preset room temperature is 23°C
Hysteresis is 1°C
The room sensor will start to indicate room underheating after the temperature drops to 22°C.
➢Calibration - Room sensor calibration is carried out during assembly or after a longer period of use of the
sensor, if the displayed room temperature deviates from the actual one. Adjustment range: from -10°C to
+10°C with a step of 0.1°C.
4.1.2. SET TEMPERATURE
The function is described in the Menu → Zones section.
4.1.3. OPERATION MODE
The function is described in the Menu → Zones section.
4.1.4. OUTPUTS CONFIGURATION
This option controls the outputs: floor heating pump, no-voltage contact and outputs of sensors 1-8 (NTC to control the
temperature in the zone or floor sensor to control the floor temperature). Sensor outputs 1-8 are assigned to zones 9-,
respectively.
The type of sensor selected here will appear by default in the option: Menu → Fitter's menu → Zones → Zones... → Room
sensor → Select sensor (for temperature sensor) and Menu → Fitter's Menu → Zones → Zones… → Floor heating → Floor
sensor → Select sensor (for floor sensor).
The outputs of both sensors are used to register the zone by wire.
The function also allows to switch off the pump and the contact in a given zone. Such a zone, despite the need for heating,
will not participate in the control.
Zone... Room Sensor
ON
Set temperature
Operation mode
Outputs configuration
Settings
Actuators
Window sensors
Floor heating
Menu Fitter's Menu Zones

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4.1.5. SETTINGS
➢Weather control - the option to turn the weather control on/off.
CAUTION
•Weather control works only if in the Menu → Fitter's menu → External sensor,the Weather control option
was checked.
•The external sensor menu is available after registering the sensor with L-12.
➢Heating –the function enables/disables the heating function. There is also a selection of a schedule that
will be valid for the zone during heating and for editing of a separate constant temperature.
➢Cooling - this function enables/disables the cooling function. There is also a selection of a schedule that will
be valid in the zone during cooling and editing of a separate constant temperature.
➢Temperature settings –the function is used to set the temperature for the three operating modes (Holiday
mode, Economy mode, Comfort mode).
➢Optimum start
Optimum start is an intelligent heating control system. It consists of continuous monitoring of the heating
system and the use of this information to automatically activate the heating in advance of the time required
to reach the set temperatures.
This system does not require any involvement on the part of the user and precisely responds to any changes
that affect the efficiency of the heating system. If, for example, there are changes made to the installation
and the house warms up faster, the optimum start system will identify the change at the next programmed
temperature change resulting from the schedule, and in the subsequent cycle it will delay the activation of
the heating until the last moment, reducing the time required to reach the preset temperature.
Room temperature –OPTIMUM START OFF Room temperature –OPTIMUM START ON
A–programmed moment of changing the economic temperature to the comfortable one
Activating this function will ensure that when the programmed change of the set temperature resulting from
the schedule occurs, the current temperature in the room will be close to the desired value.
CAUTION
The optimum start function only works in the heating mode.