TECH CONTROLLERS

Safety Information

Before using the device for the first time, read the following regulations carefully. Non-compliance may lead to personal injuries or controller damage. Store the user manual in a safe place for future reference. Ensure all users are familiar with the device's operation and security functions. If the device is sold or moved, the manual must accompany it.

The manufacturer is not responsible for injuries or damage resulting from negligence. Users must take necessary safety measures to protect lives and property.

⚠️ WARNING: A live electrical device! Ensure the regulator is disconnected from the mains before any power supply activities (plugging cables, installation, etc.). The device should be installed by a qualified electrician. The device should not be operated by children.

⚠️ WARNING: The device may be damaged if struck by lightning. Ensure the plug is disconnected from the power supply during a thunderstorm. Any use other than specified by the manufacturer is forbidden. The device should be periodically checked.

Changes described in this manual may have been introduced after its completion on 28.05.2021. The manufacturer reserves the right to change the structure or colors. Illustrations may include additional equipment. Print technology may cause color differences.

[Symbol of a crossed-out waste bin, indicating proper disposal of electronic waste.] We are committed to protecting the environment. Manufacturing electronic devices requires environmentally safe disposal of used components. The user must transfer used equipment to a collection point for recycling.

Device Description

The EU-T-4.1/EU-T-4.2 room regulator controls heating devices (e.g., gas, oil, or electric boilers). Its primary function is to maintain the set temperature by signaling the heating/cooling device when the desired temperature is reached.

Advanced Software Functions:

• Maintaining the pre-set room temperature
• Manual mode
• Day/night program
• Weekly control
• Optimum Start
• Heating/cooling

Controller Equipment:

• Front panel made of glass
• Built-in temperature sensor
• Batteries

How to Install the Controller

The controller should be installed by a qualified electrician.

Diagram showing the EU-T-4.1/EU-T-4.2 regulator with dimensions: A = 134 mm, B = 94 mm, C = 24 mm.

The EU-T-4.1/EU-T-4.2 regulator can be placed anywhere (1) or used as a wall-mountable panel (2).

1. The regulator can be supported by a stand attached to the back cover.

2. To hang the regulator on the wall, carefully remove the stand.

To insert batteries, remove the back cover.

EU-T-4.1 Connection Diagram

Wiring diagram for connecting the EU-T-4.1 regulator to a heating device using a two-core cable.

EU-T-4.2 Connection Diagram

For wireless connection, a two-core communication cable should be connected to appropriate ports in the receiver.

EU-MW-2 Receiver

The EU-T-4.2 regulator communicates with the heating device (or CH boiler controller) via radio signal to the EU-MW-2 receiver. The receiver connects to the heating device via a two-core cable and communicates wirelessly with the room regulator.

• [Registration/channel change button]
• [Red control light 1]
• [Red control light 2]
• [Red control light 3]

The receiver has three control lights:

• Red control light 1: Indicates data reception and turns on during channel change.
• Red control light 2: Indicates receiver operation.
• Red control light 3: Turns on when room temperature fails to reach the pre-set value, indicating the heating device is switched on.

NOTE: If there is no communication (e.g., due to a discharged battery), the receiver automatically disables the heating device after 15 minutes.

How to change the communication channel:

Channel 35 is the default. To change it, press and hold the channel change button on the receiver for about 10 seconds until red control light 1 illuminates. Then, change the channel in the room regulator as described in the 'Controller functions' section. Red control light 1 on the receiver should then turn off.

External Temperature Sensor

The EU-T-4.2 regulator can optionally use an external temperature sensor. Mount the sensor in a shaded area, away from weather influences. Temperature readings are sent to the regulator every few minutes and displayed on the main screen. The sensor communicates wirelessly with the regulator, pre-configured for channel 35, but this can be changed if necessary.

Diagram showing the external temperature sensor and its communication button.

How to change the communication channel:

Press and hold the channel change button. When the control light flashes, channel change is initiated. Continue holding until the light flashes again. The number of flashes corresponds to the first digit of the desired channel. Release the button after the flashes and press again to set the second digit (light flashes twice). Hold the button until the desired number of flashes for the second digit. Upon release, the light flashes twice, confirming the new channel.

NOTE: For one-digit channel numbers (0-9), set 0 as the first digit.

Example 1 (Channel 28): Set first digit (2) by holding button until 2 flashes. Release and press again. Set second digit (8) by holding button until 8 flashes. Release, light flashes twice.

Example 2 (Channel 7): Set first digit (0) by pressing and releasing button immediately after initiation. Set second digit (7) by holding button until 7 flashes. Release, light flashes twice.

If errors occur during channel change, the control light remains on for about 2 seconds, and the channel will not be changed.

First Start-Up

For correct operation, follow these steps when starting the device for the first time:

1. Insert batteries (remove the back cover first).
2. Connect the two-core cable to the appropriate sockets in the regulator or receiver.
3. For EU-T-4.2, ensure the communication channel in the regulator matches the receiver. Channel 35 is the default. Select a different channel if there is interference with other radio devices.

How to Use the Regulator

Principle of Operation

The EU-T-4.1/EU-T-4.2 room regulator maintains the pre-set room temperature by sending a signal (contact opening) to the heating device when the target temperature is reached. The heating device then disables or switches to sustain mode.

Operation Modes

The regulator can operate in several modes:

Day/night mode

Pre-set temperature varies based on time of day (daytime: comfort temp, nighttime: economical temp). Users can define exact times for day and night modes. Activate by pressing buttons until the [Day/night mode icon] appears.

Weekly control

Allows users to define when comfort and economical temperatures apply. Supports 9 programs:

• Programs 1-3: Daily settings for the entire week.
• Programs 4-6: Separate settings for weekdays and weekends.
• Programs 7-9: Separate settings for each day of the week.

Activate by pressing buttons until the [Weekly control icon] appears.

Manual mode

Pre-set temperature is adjusted manually using plus/minus buttons ([Minus Button] / [Plus Button]). Manual mode activates automatically when these buttons are pressed. The previous mode enters sleep mode until the next programmed temperature change. Manual mode can be deactivated by pressing these buttons.

Example 1: Manual mode activation in Day/night mode. User adjusts temperature, activating manual mode. Controller returns to Day/night mode at programmed time changes or when specific buttons are pressed.

Example 2: Manual mode activation in Weekly control mode. User adjusts temperature, activating manual mode. Controller returns to Weekly control mode at programmed schedule changes or when specific buttons are pressed.

Main Screen View and Description

The user operates the device using buttons. While one parameter is being edited, other icons are not displayed.

Diagram of the main screen with numbered buttons: 1. Display, 2. [Weekly Control Button], 3. [Minus Button], 4. [MENU Button], 5. [Plus Button], 6. [Day/Night Mode Button].

1. Display: Shows current information.

2. [Weekly Control Button]: In main screen view, activates weekly control mode. In controller menu, switches between functions.

3. [Minus Button] (-): In main screen view, switches to manual mode and decreases pre-set temperature. In controller menu, changes parameter settings or enters service code.

4. [MENU Button]: Hold to enter the controller menu. While editing, hold to confirm changes and return to the main screen.

5. [Plus Button] (+): In main screen view, switches to manual mode and increases pre-set temperature. In controller menu, changes parameter settings or enters service code.

6. [Day/Night Mode Button]: In main screen view, activates day/night mode. In controller menu, switches between functions.

Screen Elements Description:

Diagram of the main screen showing various elements with numbers: 1. Day of the week, 2. Economical Temperature Icon, 3. Comfort Temperature Icon, 4. Outside Temperature, 5. Pre-set room temperature, 6. Time, 7. Battery Level, 8. Heating/Cooling Icon, 9. Current Operation Mode, 10. Current Room Temperature, 11. Parameter Icons.

• 1. Day of the week: Displays the current day (e.g., MON, TUE, WED).
• 2. Economical Temperature Icon: Informs about current economical temperature (from weekly control or day/night mode).
• 3. Comfort Temperature Icon: Informs about current comfort temperature (from weekly control or day/night mode).
• 4. Outside Temperature: Displays outside temperature (for wireless version EU-T-4.2 with external sensor).
• 5. Pre-set room temperature: The target temperature set by the user.
• 6. Time: Displays the current time.
• 7. Battery Level: Indicates battery status.
• 8. Heating/Cooling Icon: Indicates room cooling/heating status. Icon flashes for heating when pre-set temp not reached; steady when reached. Icon rotates for cooling when temp is above pre-set; steady when reached.
• 9. Current Operation Mode: Shows 'Weekly', 'Manual', or 'Day/night'.
• 10. Current Room Temperature: Displays the actual measured room temperature.
• 11. Parameter Icons: Various icons representing settings (see table below).

Parameter Icons

Controller Functions

Navigate the menu using buttons. To edit parameters, press and hold [MENU Button]. Press [Down Arrow] to view functions; the edited parameter flashes. Use [Plus Button] / [Minus Button] to change settings. Press [Checkmark] to confirm and move to the next parameter, or press [Up Arrow] to confirm and return to the previous parameter. Press and hold [MENU Button] to confirm and return to the main screen (except for weekly control settings and channel selection).

Main Menu

• Day of the week
• Clock
• Day from...
• Night from...
• Optimum start
• Service menu
• Weekly program
• Pre-set comfort temperature
• Pre-set economical temperature
• Hysteresis
• Calibration

Day of the Week

After entering the main menu, only relevant icons are displayed. The first parameter is the day of the week. Press [Plus Button] or [Minus Button] until the current day appears. Press [Checkmark] to confirm and move to the next parameter, or press and hold [MENU Button] to confirm and return to the main screen.

Clock

To set the current time, enter the menu and press [Down Arrow] or [Up Arrow] until the time setting screen appears. Use [Plus Button] or [Minus Button] to set the hour and minutes. Press [Checkmark] to confirm. Press [Checkmark] to move to the next parameter or press and hold [MENU Button] to confirm and return to the main screen.

Day from...

This function sets the exact time for entering day mode (comfort temperature). When Day/night mode is active, press [Down Arrow] or [Up Arrow] until 'Day from...' screen appears. Use [Plus Button] or [Minus Button] to set the hour and minute. Press [Checkmark] to confirm and move to the next parameter, or press and hold [MENU Button] to confirm and return to the main screen.

Night from...

This function sets the exact time for entering night mode (economical temperature). When Day/night mode is active, press [Down Arrow] or [Up Arrow] until 'Night from...' screen appears. Use [Plus Button] or [Minus Button] to set the hour and minute. Press [Checkmark] to confirm and move to the next parameter, or press and hold [MENU Button] to confirm and return to the main screen.

Optimum Start

Optimum Start is an intelligent system that monitors heating/cooling efficiency and activates the process in advance to reach pre-set temperatures. It requires no user intervention and adapts to changes in heating system efficiency. If the house heats up faster, it delays activation in the next cycle, reducing time to reach the desired temperature.

Graph showing Room temperature vs. Time: OPTIMUM START switched off.

Graph showing Room temperature vs. Time: OPTIMUM START switched on.

A - pre-programmed change from economical temperature to comfort temperature.

To configure, press buttons until the Optimum Start panel appears. Use [Plus Button] or [Minus Button] to activate/deactivate (ON/OFF). Press [Checkmark] to confirm and move on, or press and hold [MENU Button] to confirm and return to the main screen.

Service Menu

Certain functions are secured by a code. To adjust parameters, press buttons until the Service menu appears. The code is 215. Use [Plus Button] or [Minus Button] to select digits and [MENU Button] to confirm each digit.

Heating/cooling mode

This function selects the regulator's operation mode: controlling the cooling system or controlling the heating system. Press [Plus Button] or [Minus Button] to select the desired type. Press [Checkmark] to confirm and move to the next parameter, or press and hold [MENU Button] to return to the main screen.

Channel selection (EU-T-4.2 only)

The EU-T-4.2 communicates wirelessly via a receiver. The same channel must be selected in the controller, receiver, and external sensor (if used). Channel 35 is default. Change only if the channel is in use by other devices. To change, press buttons until the channel change screen appears. Use [Plus Button] and [Minus Button] to select the channel. Press [Checkmark] to confirm and move on, or press and hold [MENU Button] to confirm and return to the main screen.

Weekly Program

This function changes the current weekly control program and edits existing programs.

How to change weekly program number

When weekly control is enabled, the current program is active. To select a program number, enter the menu and press buttons until the weekly program setting screen opens. Press and hold [MENU Button] to open the program selection screen. Each press and hold changes the program number. When the desired number appears, press [MENU Button] to return to the main screen with the selected program set.

Screen showing weekly program number selection.

How to configure particular weekly programs

Weekly programs define when comfort and economical temperatures apply. Depending on the program number, settings can be for the whole week (1-3), weekdays/weekends (4-6), or each day separately (7-9).

STEP 1 - CHOOSE THE PROGRAM TO BE EDITED: Press and hold [MENU Button] to open the program editing screen. Program number changes with each press and hold. Edit parameters once the desired number is displayed.

Screen showing program editing with weekly program number.

STEP 2 - SELECT DAYS OF THE WEEK: For programs 1-3, settings apply to all days. For programs 4-6, select weekdays or weekend using [Down Arrow] or [Up Arrow] buttons. For programs 7-9, select each day separately using [Down Arrow] or [Up Arrow] buttons.

Screen showing editing parameters for Monday.

STEP 3 - ASSIGNING COMFORT OR ECONOMICAL TEMPERATURE TO PARTICULAR HOURS: The hour being edited is displayed. Press [Plus Button] (+) for comfort temperature, [Minus Button] (-) for economical temperature. The bottom of the screen shows hours assigned to comfort (displayed) and economical (not displayed).

Screen showing edited hour and weekday parameters.

NOTE: After finishing editing by pressing [MENU Button], the controller returns to the main screen, and the edited program is selected.

Pre-set Comfort Temperature

Used in weekly control and day/night modes. Press buttons until the comfort temperature change screen appears. Use [Plus Button] or [Minus Button] to set the desired temperature. Press [Checkmark] to confirm and move on, or press and hold [MENU Button] to confirm and return to the main screen.

Pre-set Economical Temperature

Used in weekly control and day/night modes. Press buttons until the economical temperature change screen appears. Use [Plus Button] or [Minus Button] to set the desired temperature. Press [Checkmark] to confirm and move on, or press and hold [MENU Button] to confirm and return to the main screen.

Pre-set Temperature Hysteresis

Defines the tolerance for activating cooling or heating (0.2 - 4°C). To set hysteresis, press buttons until the hysteresis settings screen appears. Use [Plus Button] or [Minus Button] to set the value. Press [Checkmark] to confirm and move on, or press and hold [MENU Button] to confirm and return to the main screen.

Example: Pre-set temperature: 23°C, Hysteresis: 1°C. Regulator reports low temperature only when it drops to 22°C.

Temperature Sensor Calibration

Performed when mounting or after long use if the internal sensor differs from actual temperature. Calibration range: -10°C to +10°C, accuracy 0.1°C. Press buttons until the sensor calibration panel appears. Use [Plus Button] and [Minus Button] to define correction. Press [Checkmark] to confirm and move on, or press and hold [MENU Button] to confirm and return to the main screen.

Technical Data

* AC1 load category: single-phase, resistive or slightly inductive AC load.
** DC1 load category: direct current, resistive or slightly inductive load.

EU-MW-2 (EU-T-4.2) Specifications:

EU Declarations of Conformity

EU declaration of conformity (EU-T-4.1)

TECH STEROWNIKI declares that EU-T-4.1, manufactured in Wieprz, is compliant with Directive 2014/35/EU, 2014/30/EU, 2009/125/EC, and regulations concerning hazardous substances. Harmonized standards used: PN-EN IEC 60730-2-9:2019-06, PN-EN 60730-1:2016-10.

UE declaration of conformity (EU-T-4.2)

TECH STEROWNIKI declares that EU-T-4.2, manufactured in Wieprz, is compliant with Directive 2014/53/EU, 2009/125/EC, and regulations concerning hazardous substances. Harmonized standards used include PN-EN IEC 60730-2-9, PN-EN 62479, ETSI EN 301 489-1, ETSI EN 301 489-3, ETSI EN 300 220-2, ETSI EN 300 220-1.

Wieprz, 28.05.2021