Installation
and operation

manual. Print version

терморегулятор terneo sx
In the box: thermostat, frame, temperature sensor with connected wire, installation and operation manual, the packing box
Manual

Content

Content

Purpose

Purpose

The thermostat terneo pro is designed to maintain a comfortable room temperature according to the weekly schedule. Savings of up to 50% are ensured due to the fact that underfloor is heated only when it is needed. The thermostat's non-volatile memory saves all settings and heating schedules in case of a power outage.

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‍Heating are controlled using data from air and floor temperature sensors. The thermostat provides 
3 modes of maintaining a comfortable temperature: air with floor restriction, floor and air.

– The basis of the electric underfloor heating can be a heating cable or film.
– Water underfloor heating should be controlled by a normally closed or normally open electrothermal actuator with an operating voltage of 230 V.
– Control of electric convectors, infrared panels, other electric heaters or coolers is carried out by using the built-in air sensor.

‍The power relay is provided for long-lasting operation and reliability of its contacts: protection against frequent switching of the thermostat relay and switching on the load as close as possible to the moment when the voltage sine wave passes through zero. Slight deviations from zero crossing are possible due to different tripping times of different power relay models.

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Technical data

Technical data

Maximum load current (for category AC-1)
16 А
Adjustment range
air 5...35 °С, floor 5...60 °С
Temperature hysteresis
air 0,5 °С, floor 0,1...10 °С
Maximum power load (for category AC-1)
3 000 VА
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Input voltage
230 V ±10%
Weight in the complete set
0,18 kg ±10%
Temperature sensor (in set)
NTC thermo-resistor 10 kOhm at 25 ° C (R10)
Length of the sensor connected cable
3 m
Maximum extension length of the temperature sensor
20 m
Number combinations under heat, at least
50 000 cycles
Number of combinations 
without heating, no less than
20 000 000 cycles
Cross section of connection wires
not more
than 2,5 mm²
Overall dimensions (w·h·d)
75 х 75 х 43 mm
Inner overall dimensions
of decorative frame
45 х 45 mm
Compatibility with frames  from other manufacturers
Schneider Electric Unica
Available interface languages
ua, cs, en, ru, de
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Electrical connection diagram

Electrical connection diagram

‍Important! Perform the installation and load test before connecting to the thermostat. Connect the floor temperature sensor and the mains voltage correctly. Otherwise, the thermostat may malfunction.

‍The thermostat supports operation with analog (default R10) and digital (D18) sensors. The analog sensor is connected to terminals 1 and 2.

The digital sensor is connected to terminal 1 with a white wire and to terminal 2 with a blue wire. Select the sensor type in the thermostat menu: d18 (see page 11, menu item "Sensor type"). The supply voltage (230 V ±10%, 50 Hz) is supplied to terminals 4 (zero, N) and 5 (phase, L). The load (connecting wires from the heating element) is connected to terminals 3 and 6.

Diagram 1. 
Connecting a thermostat for heating with a two-core cable
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Diagram 2. 
Connecting the load via a magnetic starter
When connecting via a contactor, go to the "Settings → General settings menu and enable the Contactor function".
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Setup Wizard

Setup Wizard

‍We recommend that you do the first setting of the thermostat through the "Setup Wizard", which sets the basic parameters of the device. It starts automatically when you turn it on for the first time or after resetting the device to factory settings. You can enter the "Setup Wizard" in the following way:

Menu ­­→ Settings → Setup Wizard
Save the settings and go to the next item with the "OK" button.

1. Choose language (factory setting — Ukrainian)

‍Available for selection: Ukrainian, Czech, English, Russian, German.

2. Set date / time

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3. Daylight saving time / winter time function

(factory setting — disabled)
If enabled, the time will automatically move forward one hour at 3:00 am on the last Sunday in March and 1 hour back at 4:00 am on the last Sunday in October.

4. Temperature maintenance mode

– By floor
– By air
– By air with floor restriction. The thermostat will maintain the temperature of the air, while not allowing the floor to overheat or cool down excessively. For this mode, enter the minimum and maximum floor temperatures.
The main screen in Air with floor restriction mode will display the FLOOR icon and the floor temperature when floor restriction is triggered:

5. Heating and cooling mode

(factory setting — heating)
If you are using terneo pro to control cooling equipment, change the mode to Cooling.
The Cooling mode is available when the temperature is maintained by floor or air (see point 4).

6. Battery Saving function

(factory setting — disabled)
The function allows you to extend the service life of the thermostat by saving the internal battery. To activate, enter the start and end date of the heating season, and on the last day of the season the device will automatically disconnect the battery and turn off itself.

7. Set the power of the connected load

(factory setting 2000 W, range 100–3000 W)
To calculate statistics and correctly measure the air temperature, set the power of the connected load in the settings.
If the load is switched by a contactor, enable the Contactor function in the General settings and enter the power that will be passed through the contactor.

8. Enable / disable the Schedule mode

(factory setting — enabled)
If you want to maintain one set temperature, turn off the Schedule mode.
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Exploitation

Exploitation

Main screen:
Schedule mode is enabled.
Temporary mode is automatically activated when the current temperature in Schedule mode changes.
The Manual mode is automatically activated when the Schedule mode is deactivated. During the Manual mode, the thermostat maintains one set temperature.

Locking the buttons

To lock / unlock, hold down the left and right buttons for 5 seconds. We recommend using it in public places and as a childproofing device.

Enabling / disabling

‍To turn off the thermostat for a short period of time, press the " Button " button for 5 seconds.

If the device is not used for a long period of time, for example, at the end of the heating season, we recommend that you stop the clock and turn off the automatic washout.

Menu screen:

4 menu sections: Schedule, Data and time, Away and Settings are described on the following sheet.
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Schedule

(factory setting — enabled)
If you turned off the Schedule during the first setup through the Setup Wizard, you can turn it on by clicking Enable Schedule. Then go to Schedule settings.
First, set up a schedule, for example, for Sunday. Select the temperature that the thermostat should maintain in the morning, afternoon, evening, and night. You can increase the number of temperature periods to 16.
For other weekdays, create an individual schedule, or if there is a single schedule for all weekdays, click "Copy schedule".

Separate schedule for public holidays

(factory setting — included / Ukraine)
Use this feature if you spend the holidays at home. We added this feature because holidays often fall on weekdays, but require a comfortable temperature during the day because everyone is at home and not at work.
For your convenience, we have prepared templates of public holidays for Ukraine, Moldova, Romania, Poland, Germany, and the Czech Republic. You can create your own template: select a country and then make adjustments. You can add up to 16 holidays.
Holidays are set in a format:

Date and time

These settings are described in detail in "Main settings" on page. 6, points 2, 3, 6.

The Stop Clock function allows you to force the battery to turn off, for example, at the end of the heating season. This will turn off the thermostat completely and save battery power.

Away

Adjust the temperature and the Away period so that comfort is restored by the time you return.
To deactivate the mode, select "Away reset".

Settings

Adjust the temperature and the Away period so that comfort is restored by the time you return.
To deactivate the mode, select "Away reset".

1. Statistics

Reset the statistics before the start of the heating season to find out the estimated load energy consumption in kW⋅h for the selected period. For statistics, you need to set the load power.

2. Setup Wizard

Use it when turning on the device again or if you are not sure that you have set all the basic parameters for the operation of the thermostat.

3. Temperature setup

3.1 Here, you can change the minimum/maximum floor temperature (for the "Air with floor limitation" temperature control mode) entered in the "Setup wizard".

3.2 Frost-free function (factory setting — on) 
The heating will turn on automatically if the room temperature drops below 5 °C.

3.3 Floor temperature correction / air temperature correction (factory setting 0 °С, range
–10...+10 °С). You can use the correction if the temperature readings on the screen and your reference device are not the same.

3.4 Floor hysteresis (factory setting 1 °С, range 0,1–10 °С, step 0,1 °С). A smaller hysteresis value allows more accurate maintenance of temperature, a larger one saves on energy consumption and increases the life of the relay by reducing the number of loads switching.

4. Common settings

Sensor type (factory setting — 10 kOhm). The thermostat is compatible with floor sensors from most manufacturers, which allows you to replace another thermostat with terneo pro.

4.1 Open Window function

(factory settings — disabled)
When turned on, it will provide additional energy savings by turning off the load for 30 minutes in the event of a sharp drop in room temperature.

4.2 Рreliminary heating / cooling

(factory settings — disabled)
Use it to ensure that the desired temperature is already reached at the beginning of each period. After enabling the function, the thermostat will go through a self-learning process and calculate the time for which the heating should be turned on in advance.

4.3 Function Contactor (factory setting — disabled) Activate it if you use it during connection. If you are using a contactor, be sure to go to the Load Power menu and enter the power that will be passed through the contactor. The power can be set up to 500 kW.

4.4 Function "nc" contact (factory setting — disabled) Activate it, for example, when connecting a normally open servo drive.

4.5 Reset to factory settings. After resetting the MAIN Settings, go through the "Setup Wizard" from the beginning.

5. Information

‍Displays the thermostat malfunctions, if any, and also displays the firmware version, the total number of relay activations, the total relay operating time, and the number of thermostat activations.

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Possible issues and solutions

Possible issues
and solutions

The thermostat has a self-diagnostic system and displays the detected errors when the power is turned on and displays them in the "Information" menu section.
Load is off, screen is off
The main menu displays an exclamation mark on the clock icon "!"
The load operates according to air sensor, the floor control is not carried out. The sign "OPEN FLOOR SENSOR" or "S.C. FLOOR SENSOR" is displayed
Load does not operate according to the settings, the sign "OPEN AIR SENSOR" or "S.C. AIR SENSOR" is displayed
Load does not operate according to the settings, the sign "OPEN FLOOR SENSOR" or "S.C. FLOOR SENSOR" is displayed
Load doesn't operate, the temperature readings flash on the screen and "OVERHEAT" is displayed
Load operates, "!" symbol is displayed on the 
screen

‍Resistance of external temperature sensor at different ambient temperatures: 5 °С — 25339 Ω,
10 °С — 19872 Ω, 20 °С — 12488 Ω, 30 °С — 8059 Ω, 40 °С — 5330 Ω.

Additional information

Additional information

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Version of instruction v11713