Tech Controllers EU-L-12 User manual

EU-L-12

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TABLE OF CONTENTS
I. Safety ...............................................................................................................................................................................4
II. System description ..........................................................................................................................................................5
III. How to install...................................................................................................................................................................5
IV. First start-up ..................................................................................................................................................................12
V. Main screen description................................................................................................................................................13
An example screen view –zones ......................................................................................................................................13
An example screen view –zone........................................................................................................................................14
VI. Controller functions.......................................................................................................................................................15
1. Operation mode ...........................................................................................................................................................15
2. Zones ............................................................................................................................................................................15
2.1. ON........................................................................................................................................................................15
2.2. Pre-set temperature ............................................................................................................................................15
2.3. Operation mode ..................................................................................................................................................16
3. Controller settings........................................................................................................................................................17
3.1. Time settings........................................................................................................................................................17
3.2. Screen settings.....................................................................................................................................................17
3.3. Button sounds......................................................................................................................................................17
4. Fitter’s menu ................................................................................................................................................................17
4.1. Main module........................................................................................................................................................18
4.2. Additional modules..............................................................................................................................................29
4.3. External sensor ....................................................................................................................................................29
4.4. Control panel .......................................................................................................................................................30
4.5. Repeater configuration........................................................................................................................................30
4.6. Internet module...................................................................................................................................................31
4.7. Manual mode.......................................................................................................................................................31
4.8. Heating stopping..................................................................................................................................................31
4.9. Voltage-free contact ............................................................................................................................................32
4.10. Pump....................................................................................................................................................................32
4.11. Heating - cooling..................................................................................................................................................32
4.12. Anti-stop settings.................................................................................................................................................32
4.13. Maximum humidity .............................................................................................................................................33
4.14. OpenTherm..........................................................................................................................................................33
4.15. Language..............................................................................................................................................................34
4.16. DHW settings .......................................................................................................................................................34
4.17. Heat pump ...........................................................................................................................................................34
4.18. Factory settings....................................................................................................................................................35
5. Service menu................................................................................................................................................................35

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6. Factory settings ............................................................................................................................................................35
7. Software version...........................................................................................................................................................35
VII. Alarm list........................................................................................................................................................................35
VIII. Software update............................................................................................................................................................37
IX. Technical data................................................................................................................................................................38
JG. 07.02.2023
The pictures and diagrams are for illustration purposes only.
The manufacturer reserves the right to introduce some changes.

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I. SAFETY
Before using the device for the first time the user should read the following regulations carefully. Not obeying the rules
included in this manual may lead to personal injuries or controller damage. The user’s manual should be stored in a safe place
for further reference. In order to avoid accidents and errors, it should be ensured that every person using the device has
familiarized themselves with the principle of operation as well as security functions of the controller. If the device is to be
put in a different place, make sure that the user’s manual is stored with the device so that any potential user has access to
essential information about the device. The manufacturer does not accept responsibility for any injuries or damage resulting
from negligence; therefore, users are obliged to take the necessary safety measures listed in this manual to protect their lives
and property.
WARNING
•High voltage! Make sure the regulator is disconnected from the mains before performing any activities
involving the power supply (plugging cables, installing the device etc.)
•The device should be installed by a qualified electrician.
•Before starting the controller, the user should measure earthing resistance of the electric motors as well as the
insulation resistance of the cables.
•The regulator should not be operated by children.
WARNING
•The device may be damaged if struck by a lightning. Make sure the plug is disconnected from the power supply
during storm.
•Any use other than specified by the manufacturer is forbidden.
•Before and during the heating season, the controller should be checked for condition of its cables. The user
should also check if the controller is properly mounted and clean it if dusty or dirty.
Changes in the products described in the manual may have been introduced subsequent to its completion on 07.02.2023.
The manufacturer retains the right to introduce changes to the structure or colours. The illustrations may include additional
equipment. Print technology may result in differences in colours shown.
Care for the natural environment is our priority. Being aware of the fact that we manufacture
electronic devices obligates us to dispose of used elements and electronic equipment in a
manner which is safe for nature. As a result, the company has received a registry number
assigned by the Main Inspector of Environmental Protection. The symbol of a crossed out rubbish
bin on a product means that the product must not be thrown out to ordinary waste bins. By
segregating waste intended for recycling, we help protect the natural environment. It is the user's
responsibility to transfer waste electrical and electronic equipment to the selected collection
point for recycling of waste generated from electronic and electrical equipment.

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II. SYSTEM DESCRIPTION
The EU-L-12 external controller is the heart of an extensive heating control system. It has wireless and RS 485 wired
communication. Its primary function is to maintain the pre-set temperature in each zone. It is the main unit which, together
with all peripheral devices such as the EU-ML-12 slave controllers (max 4), the EU-M-12 control panel, room sensors, room
regulators, floor sensors, an outdoor sensor, window sensors, thermostatic actuators, signal repeaters and Internet modules
form the whole integrated system. The EU-L-12 external controller is therefore an indispensable element of the entire heating
system, while the remaining slave units increase the functionality of this system.
Thanks to advanced software, the EU-L-12 controller may fulfil a range of functions:
•controlling up to 4 slave controllers EU-ML-12
•possibility of connecting the EU-M-12 control panel
•controlling dedicated wired regulators EU-R-12b, EU-R-12s, EU-F-12b, 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
•possibility of connecting an Internet module EU-505, EU-WiFi RS or EU-WiFi L (included with the controller) to control
the system online
•compatible with a floor temperature sensor
•compatible with an outdoor temperature sensor (weather-based control function)
•compatible with wireless window sensors (6 sensors per zone)
•possibility of controlling wireless actuators STT-868 or STT-869, EU-G-X (6 actuators per zone)
•possibility of controlling thermostatic actuators
•possibility of controlling a mixing valve (after connecting a valve module EU-i-1 or EU-i-1m
•controlling a heating or cooling device using a voltage-free contact
•one 230V output for a pump
•possibility of setting individual operation schedules for each zone
•software update via USB
•Open Therm communication
III. HOW TO INSTALL
The EU-L-12 controller should be installed by a qualified person.
WARNING
It is impossible to connect two or more EU-L-12 controllers.
CAUTION
Risk of fatal electric shock from touching live connections. Before working on the controller switch off the power
supply and prevent it from being accidentally switched on.
WARNING
Incorrect connection of wires may damage the controller.

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Mounting electrolytic capacitors
In order to reduce the phenomenon of fluctuation in the temperature read from the zone sensor, use a 220uF / 25V low
impedance electrolytic capacitor connected parallel to the sensor cable. When installing a capacitor, pay special attention to
polarization. The ground of the element marked with a white stripe should be screwed into the right-hand side terminal of
the sensor connector (looking at it from the front of the controller), which can be seen in the attached photographs. The
second terminal of the capacitor should be screwed into the left-hand side terminal of the connector. So far the application
of this solution has eliminated completely the occurring disturbances. It is worth noting, however, that the basic principle is
proper connection of wires to avoid disruption. The cable should not be placed close to the sources of the electromagnetic
field, but if this is the case, it is necessary to use a filter in the form of a capacitor.
Pictorial diagram presenting wiring and communication with other devices in the system:
220uF/25V low impedance
electrolytic capacitor

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In the case of a wired connection between devices: external controllers (EU-L-12 and EU-ML-12), regulators and the panel,
termination resistors (jumpers) should be used at the beginning and at the end of the transmission line. The external
controllers have a built-in termination resistor, which should be set in the appropriate position:
•A, B –termination resistor ON (the first and the last controller)
•B, X –neutral position (factory setting)
NOTE
The order of external controllers in the case of a terminating connection does not matter.
Connecting external controllers

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In the case of connecting the regulators to the first external controller, the jumper should be switched to the ON position
in the external controller and the last regulator.
In the case of connecting the regulators to the external controller placed in the middle of the transmission line, the jumper
should be switched to the ON position in the first and the last regulator.
Connection between external controller and regulators

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NOTE
The panel should be connected to the first or last external controller due to the fact that the panel does not
use a termination resistor.
Connection between external controller and panel

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IV. FIRST START-UP
In order for the controller to operate correctly, the user must follow these steps when starting the device for the first time:
Step 1. Connect the EU-L-12 controller with all the devices to be controlled
Remove the controller’s cover and connect the wires following the clues on the connectors and the diagrams below.
Step 2. Switch on the power supply and check if the devices work
Once all the devices have been connected, switch on the power supply.
Go to Menu →Fitter’s menu →Manual mode to check if each device works - use the buttons to select a device and
press MENU button - the device should switch on. Follow this procedure to check all the devices.
Step 3. Set time and date
In order to set current time and date, go to Menu→ Controller settings → Time settings.
NOTE
If the EU-505, EU-WiFi RS or EU-WiFi L module is used, the current time may be downloaded from the network
automatically.
Step 4. Configure the settings for temperature sensors and room regulators
In order to enable the EU-L-12 to control a given zone, it is necessary to provide it with current temperature value. The easiest
way is to use a wired or wireless temperature sensor (EU-C-7p, EU-C-mini, EU-CL-mini, EU-C-8r). If the user wants to be able
to change the pre-set temperature value directly from the zone, it is advisable to use EU-R-8X, EU-R-8b, EU-R-8z, EU-R-8b
Plus room regulators or dedicated regulators EU-R-12b, EU-R-12s, EU-F-12b or EU-R-X. In order to pair a sensor with the
external controller, go to Menu → Fitter’s menu → Main module/Additional modules → Zones → Zone… → Room sensor
→ Sensor selection.
Step 5. Configure the control panel EU-M-12 and additional controllers EU-ML-12
The EU-L-12 controller may cooperate with the EU-M-12 control panel. It serves as a master controller enabling the user to
change the pre-set temperatures in different zones, change the settings of local and global weekly schedules etc. Only one
room regulator of this type may be installed in the heating system. It is necessary to register such a device in Menu → Fitter’s
menu → Control panel.
It is possible to expand the number of controlled zones using additional controllers EU-ML-12 (up to 4 in one system). Each
controller needs to be registered separately in the EU-L-12 controller (Menu → Fitter’s menu → Additional modules →
Module 1..4 ).
Step 6. Configure the remaining devices
The EU-L-12 controller can also work with other devices:
- Internet module EU-505, EU-WiFi RS or EU-WiFi L
After connecting the Internet module, the user can control the system via the Internet through the emodul.eu application.
A detailed description of the configuration can be found in the manual of the given module.
- mixing valve module EU-i-1, EU-i-1m
- additional contacts, e.g. EU-MW-1 (6 contacts per controller)
NOTE
If the user wants to use such devices in the system, they need to be connected and/or registered.

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V. MAIN SCREEN DESCRIPTION
The user navigates in the menu structure using the buttons located below the display.
1. Display
2. MENU button - enter the controller menu, confirm the settings
3. - it is used to view the menu options and decrease the value while editing parameters. During standard
operation the button is used to switch between parameters of different zones.
4. - it is used to view the menu options and increase the value while editing parameters. During standard
operation the button is used to switch between parameters of different zones.
5. EXIT button –it is used to exit the menu, cancel the settings, select the screen view (zones, zone).
AN EXAMPLE SCREEN VIEW –ZONES
1. Current day of the week
2. Outdoor temperature
3. Pump ON
1
2
3
4
5
1
2
5
3
4
7
8
9
10
11
12
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4. Voltage-free contact ON
5. Current time
6. DHW function active
7. Current operation mode/schedule in a given zone
L
local schedule
CON
constant temperature
G-1….G-5
global schedule 1-5
02:08
with time limit
8. Signal strength and battery level in the room sensor
9. Pre-set temperature in a given zone
10. Current floor temperature
11. Current temperature in a given zone
zone heating
zone cooling
12. Zone information. The digit displayed indicates the room sensor which provides current temperature information
from a given zone. If the zone is currently being heated or cooled (depending on the selected mode), the digit
flashes. In the event of a zone alarm, an exclamation mark is displayed instead of the digit. In order to view the
operation parameters of a given zone, select its number using the buttons .
AN EXAMPLE SCREEN VIEW –ZONE
1. Outdoor temperature
2. Battery level
3. Current time
4. Current operation mode in the given zone
5. Pre-set temperature in the given zone
6. Current temperature in the given zone
7. Current floor temperature
8. Maximum floor temperature
9. Number of window sensors registered in the given zone
zone heating ON
zone cooling ON
3
1
2
4
5
6
7
8
9
10
11
12
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10. Number of actuators registered in the given zone
11. Icon of the given zone
12. Current humidity level in the given zone
13. Zone name
VI. CONTROLLER FUNCTIONS
1. OPERATION MODE
This function enables the user to activate one of the operation modes available:
➢Normal mode –pre-set temperature depends on the selected schedule.
➢Holiday mode –pre-set temperature depends on the mode settings
Menu → Fitter’s menu → Main module → Zones > Zone 1-8 → Settings > Temperature settings > Holiday mode
➢Economical mode –pre-set temperature depends on the mode settings
Menu → Fitter’s menu → Main module → Zones > Zone 1-8 → Settings > Temperature settings > Economical mode
➢Comfort mode –pre-set temperature depends on the mode settings
Menu → Fitter’s menu → Main module → Zones > Zone 1-8 → Settings > Temperature settings > Comfort mode
NOTE
•Changing the mode to holiday, economical or comfort mode involves all the zones. The user may only adjust the
pre-set temperature of the given mode a particular zone.
•In the operation mode other than normal mode, it is not possible to change the pre-set temperature from the level
of the regulator.
2. ZONES
2.1. ON
In order for a given zone to be displayed on the screen as an active zone, a sensor must be registered in it (see: Fitter’s menu).
This function enables the user to deactivate the zone and hide the parameters from the main screen view.
2.2. PRE-SET TEMPERATURE
The pre-set zone temperature depends on the current zone operation mode, i.e a weekly schedule. However, this function
enables the user to deactivate the schedule and set the temperature value separately for a pre-defined period of time. When
the time elapses, the pre-set temperature will depend on the previous mode again. The value of the pre-set temperature
along with the time left before the next temperature change is displayed on the main screen on an ongoing basis.
Menu Operation mode
Zones
Controller settings
Fitter's menu
Service menu
Factory settings
Software update

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NOTE
If the duration of a given pre-set temperature value is set as CON, this temperature will apply for an indefinite
period of time (constant temperature).
2.3. OPERATION MODE
This submenu enables the user to view, edit and configure the operation mode in a given zone.
•Local schedule –it is a weekly schedule assigned to a given zone only
•Global schedule 1-5 –the settings of these schedules apply in all the zones where the schedule has been selected.
•Constant temperature (CON) –this function enables the user to define the pre-set temperature which will apply in
a given zone regardless of the time of the day.
•Temperature with time limit –this function enables the user to define the pre-set temperature which will apply for
a specified period of time. When the time is over, the temperature will depend on the previous mode (schedule or
constant temperature without time limit).
2.3.1.HOW TO EDIT SCHEDULES
Menu →Zones→Main module →Zone 1-8 →Operation mode →Schedule… → Edit
1. Days when the above settings apply
2. Pre-set temperature outside the time periods
3. Pre-set temperatures for the time periods
4. Time periods
Follow these steps to configure a schedule:
•Use the arrows to select the part of the week when the schedule will apply (week part 1 or week part 2).
•Use the MENU button to go to the pre-set temperature settings, which will apply outside the time periods - set the
temperature using arrows and confirm by pressing the MENU button.
•Press the MENU button to go to the settings of time periods and use the arrows to set the temperature which will
apply in a given time period. Confirm by pressing the MENU button.
1
3
2
4

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•Next, go on to edit the days which will be assigned to the first or the second part of the week. Active days are
displayed in white. Use the MENU button to confirm and the arrows to move between the days.
Once the schedule for all days has been set, press the EXIT button and select Confirm by pressing the MENU button.
NOTE
The user may set up to 3 time periods in a given schedule (with the accuracy of 15 minutes).
3. CONTROLLER SETTINGS
3.1. TIME SETTINGS
The current time and date may be automatically downloaded from the network if the Internet module is connected and the
automatic mode is on. The user may also set the time and date manually if the automatic mode does not work properly.
3.2. SCREEN SETTINGS
This function enables the user to adjust the screen settings to individual needs.
3.3. BUTTON SOUNDS
This option is used to enable the sound which will be heard when pressing the buttons.
4. FITTER’S MENU
The fitter’s menu is the most extensive controller menu offering a wide range of functions to maximize the controller
capabilities.
Fitter's
menu
Main module
Additional modules
External sensor
Control panel
Repeater configuration
Internet module
Manual mode
Heating stopping
Voltage - free contact
Pump
Heating - cooling
Anti - stop settings
Maximum humidity
OpenTherm
Language
DHW settings
Heat pump
Factory settings

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4.1. MAIN MODULE
The EU-L-12 controller is treated as the main module offering the user access to 8 zones which may be freely configured.
4.1.1.ZONES
In order for a given zone to be active on the controller display, a sensor must be registered/activated in it, and then this zone
must be turned on.
4.1.1.1. ROOM SENSOR
The user may register/activate any type of sensor: a wired NTC sensor or a wireless RS sensor.
➢Hysteresis - it introduces tolerance of the pre-set room temperature, within the range of 0,1 ÷ 5°C, at which
heating/cooling is enabled.
Example:
Pre-set room temperature: 23°C
Hysteresis: 1°C
The room sensor will indicate that the room temperature is too low when the temperature drops to 22°C.
➢Calibration - room sensor calibration should be performed while mounting or after it has been used for a
long time, if the external temperature displayed differs from the actual temperature. Calibration setting
range is from -10OC to +10OC with the accuracy of 0,1OC.
4.1.1.2. PRE-SET TEMPERATURE
This function is described in section Menu →Zones.
4.1.1.3. OPERATION MODE
This function is described in section Menu →Zones.
Zones
1-8
Room sensor
ON
Pre-set temperature
Operation mode
Outputs configuration
Settings
Actuators
Window sensors
Underfloor heating
Menu Fitter’s menu Main module
Menu Fitter’s menu Main module Zones

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4.1.1.4. OUTPUTS CONFIGURATION
The option is used to control the outputs: floor pump, voltage-free contact and outputs of sensors 1-8 (NTC for temperature
control in the zone or floor sensor for floor temperature control). The outputs of sensors 1-8 are assigned to zones 1-8
respectively.
The sensor type selected here will appear by default in the following options: Menu → Fitter’s menu → Main module →
Zones → Zones 1-8 → Room sensor → Sensor selection (for a temperature sensor) and Menu → Fitter’s menu → Main
module → Zones → Zones 1-8 → Underfloor heating → Floor sensor → Sensor selection (for a floor sensor).
The outputs of both sensors are used to register the zone through wires.
The function also allows the user to switch off the pump and the contact in a given zone. Such a zone, despite the need for
heating, will not be involved in the control.
4.1.1.5. SETTINGS
➢Weather-based control - the user may enable or disable weather-based control.
NOTE
Weather-based control works if the Weather-based control option is selected in Menu → Fitter’s menu → External
sensor.
➢Heating –this option is used to enable / disable the heating function. The user may also select a schedule
which will apply in the zone during heating and edit a separate constant temperature.
➢Cooling - this option is used to enable / disable the cooling function. The user may also select a schedule
which will apply in the zone during cooling and edit a separate constant temperature.
➢Temperature settings –this option is used to set the desired temperature for three operating modes
(Holiday mode, Economical mode, Comfort mode).
➢Optimum start
Optimum start is an intelligent system controlling the heating process. It involves constant monitoring of
the heating system efficiency and using the information to activate the heating process in advance in order
to reach the pre-set temperatures.
The system requires no user intervention. It precisely reacts to any changes that affect the efficiency of the
heating system. If, for example, some changes have been introduced to the heating system and the house
heats up faster than before, the Optimum start system will recognize the changes at the next pre-
programmed temperature change and in the next cycle the heating system activation will be adequately
delayed, reducing the time needed to reach the desired temperature.
Room temperature -
OPTIMUM START switched on:
Room temperature -
OPTIMUM START switched off:

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A –pre-programmed change from economical temperature to comfort temperature
Activating this function means that at the time of a pre-programmed change of the pre-set temperature from
comfort to economical or the other way round, the current room temperature is close to the desired value.
NOTE
The Optimum start function works only in the heating mode.
4.1.1.6. ACTUATORS
➢Settings
•SIGMA - this function allows for smooth control of the thermostatic valve. The user may also define the
minimum and maximum level of valve opening. It means that the level of valve opening and closing will
never exceed these values. Moreover, the user adjusts the Range parameter which specifies the room
temperature at which the valve starts opening and closing.
NOTE
The Sigma function is available only for the radiator actuators.
Example:
Pre-set zone temperature: 23˚C
Minimum opening: 30%
Maximum opening: 90%
Range: 5˚C
Hysteresis: 2˚C
In the example above, the thermostatic valve starts closing at the temperature of 18˚C (pre-set value minus Range). The
minimum opening is reached when the zone temperature reaches the pre-set value.
After reaching the pre-set value, the temperature starts falling. At the temperature of 21˚C (pre-set value minus hysteresis)
the valve starts opening. The maximum opening is reached at the temperature of 18˚C.