Installation
and operation

manual. Print version

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

Content

Content

Purpose
Technical data
Installation
Electrical connection diagram
Binding to the app
Exploitation
Exploitation
Possible issues and solutions

Purpose

Purpose

‍Smart Wi-Fi thermostat terneo bx ‍is used to maintain a comfortable temperature in a room that is heated via an electrical cable, infrared film or water pipes.

‍Smart functions can save up to 50% by maintaining a comfortable underfloor heating temperature only when you need it. Download terneo app or create an account on the my.terneo.ua

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‍In the absence of voltage, all thermostat settings and heating schedule are stored in the thermostat's non-volatile memory, and the clock will continue to operate from the internal power supply for three days.

The water floor heating is controlled by a thermo-electric servo drive with an operating voltage of 230 V. 
The servo can be normally closed or normally open. When connecting a normally open actuator to the terneo, activate the Normally Closed (NC) function 
in the Mobile App terneo.

Heating based on electric convectors, infrared panels and other electric heaters is controlled by placing a temperature sensor in the air.

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Technical data

Technical data

Maximum load current (for category AC-1)
32 А (max 40 A for 10 min)
Adjustment range
5...45 °С
Temperature hysteresis by floor
0,5...10 °С, step 0,1 °С
Measured temperature range
–28...+75 °С
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Maximum power load (for category AC-1)
7 000 VА
Input voltage
230 V ±10%
Weight in the complete set
0,3 kg ±10%
Temperature sensor (in set)
NTC thermo-resistor10 kOhm at 25 ° C (R10)
Length of the sensor connected cable
4 m
Maximum extension length of the temperature sensor
20 m
Supported sensor types:
analog:
NTC 4.7, 6.8, 10, 12, 15, 33, 47 kOhm at 25 °C
digital:
D18
Number combinations under heat, at least
100 000 cycles
Number of combinations 
without heating, no less than
1 000 000 cycles
Wireless networking standard
802,11 b/g/n
One of the ports is used
tcp 9000, 9010, 9020, 9030
Minimum speed of Internet connection
128 kb/s
Operating frequency range
2400-2483,5 MHz
Minimal Internet traffic
30 MB/ms
Overall dimensions (w·h·d)
53 х 85 х 66 mm
Cross section of connection wires
not more than 2,5 mm2
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Installation

Installation

‍Read this document carefully before installing and using the thermostat. This will help to avoid possible hazards, errors, and misunderstandings.

‍The thermostat is designed for indoor installation at a height ranging from 0,4–1,7 m from the floor level. The ambient temperature during installation should be within –5...+45 °C. When installing in a bathroom, toilet, kitchen, or pool, place the thermostat in a location not exposed to accidental splashes. Minimize the risk of moisture and liquids entering the installation area.

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To protect against short circuits, install an automatic circuit breaker (CB) with a rating of up to 32 A in the phase wire break before the thermostat.

To protect against electric shock, install an SSD (safety shutdown device). See diagram 1.

For installation you need:
— fix the temperature controller on the DIN-rail;
— supply power, load and sensor wires;
— make a connection according to this manual.

The terminals of the thermostat are designed for wires with a cross-section of no more than 2.5 mm². It is recommended to use soft copper wire, which can be tightened in the terminals using a screw-driver with a blade width not exceeding 3 mm and a torque of 
0.5 N·m.

The use of aluminum is not desirable. A screwdriver with a blade width greater than 3 mm may cause mechanical damage to the terminals, which can result in the loss of warranty service rights.

Installing the floor temperature sensor. Place the sensor in the floor screed using a mounting tube, such as a 16 mm diameter metal-plastic tube, which bends once with a radius of at least 5 cm and is inserted into the heating zone for 50 cm. To ensure the sensor can be replaced in the future, seal the end of the tube with a copper plug or insulation tape. Sealing with a copper plug will provide more accurate floor temperature measurements. Insert the sensor into the tube after the screed has hardened. Strip and crimp the ends of its wire with insulated terminals.

If necessary, reduction and increasing (up to 20 m) of sensor connecting wires is acceptable. Near the sensor connecting wires should not be the power cables, they may be interfere.

It is necessary that the thermostat commutes the current not more than 2/3 of the maximum power specified in the passport. If the exceeds 2/3 of the maximum current specified in the data sheet, the heating cable must be connected with a contactor (magnetic starter, power relay), which is designed for this current (diagram 2).

Figure 1. 
Mounting the thermostat and underfloor heating
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Electrical connection diagram

Electrical connection diagram

‍The analog sensor (R10) is connected to terminals 1 and 2. The colors of the wires are not important.

‍The digital sensor (D18) is connected with a blue wire to terminal 2 and a white wire to terminal 1. If the thermostat enters the Timed Emergency Mode, try connecting the blue wire to terminal 1 and the white wire to terminal 2. If the thermostat does not detect the sensor after both attempts, contact the Service Center.

‍The supply voltage (230 V ±10%, 50 Hz) is applied to terminals 3 and 4, the phase (L) is determined by the indicator and connected to terminal 4, and the neutral (N) is connected to terminal 3.

‍The load connection wires are attached to terminal 5 and the neutral terminal block (not included).

‍Important! Install and check the load before installing and connecting the thermostat.

Diagram 1. 
Connection of the circuit breaker and SSD
Diagram 2. 
Wiring and simplified internal circuit.
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Binding to the app

Binding to the app

— Please note! The thermostat does not work with 5G Wi-Fi networks. During operation, the router always creates two networks: 2.4G and 5G. When binding, be sure to select 2.4G.
— It is not recommended to connect the thermostat to a Wi-Fi network that uses Multi WAN technology.

Status of the indicator
on the thermostat
How to connect the terneo to the iOS, Android or desktop application my.terneo.ua
Text version for iOS
Text version for Android
Text version for my.terneo.ua
How the thermostat works in the presence of the Internet

‍The thermostat is constantly synchronized with the server, executing its commands, receiving the latest settings, and sending telemetry about its status. If you disable remote control of the thermostat, the server 
can only be used to accumulate statistics (details in Menu). For proper operation of statistics and heating schedule, after connecting to the server, please 
specify your time zone. Afterwards, the thermostat will automatically update the date and time via the Internet.

How the thermostat works in the absence 
of the Internet

‍The thermostat continues to operate according to the set settings. During this time, you can control the thermostat using the thermostat's buttons or the offline mode in the terneo app. Please note that instead of a fixed internet connection, you can use mobile internet. For this, you will need a separate device (for example, a smartphone) that will act as a Wi-Fi hotspot. After restoring the Internet connection, all settings will be synchronized.

Exploitation

Exploitation

‍After switching on the thermostat will start to display the sensor temperature. If it is below the current set temperature, voltage is applied to the load. The indicator starts to glow red.

‍Use "+" or "–" to change the heating temperature. The screen will first display the operating mode, then the set temperature of this mode.

‍In order to enable (disable) button blocking press the "+" and "–" buttons at the same time for 6 seconds till up to appearance in indicator "Loc" or running line ("unLoc").

Settings using buttons

‍For viewing of necessary section of the menu press certain number of times button "≡". For the selection and change use buttons "+" and "–". 5 seconds after the last push of the buttons, there is a return to the temperature display.

Operating mode
Power of the connected load
Correction
Brightness
PIN-code or local IP
Wi-Fi operating mode |access point control|
Blocking remote control of the thermostat

Settings via holding the "≡" or "–" buttons

Sleep Mode
Firmware version
Reset to Factory Settings

Possible issues and solutions

Possible issues
and solutions

The thermostat does not display PIN code. Blue indicator on controller is constantly on
LED off, controller offline in app
The screen displays "Ert" |error temperature|
When pressing the buttons on the screen, "Lbt" |low battery| is displayed
Screen is flashing "oht" |overheat|
Screen displays "OC" |open circuit| or "SC" |short circuit|
The load is off, the screen and indicator are not lit
The thermostat does not respond to changes made in the app
Incorrect password when connecting to the Wi-Fi network created by the thermostat
Preheating does not work or works incorrectly
The heating does not turn off, and the set heating temperature remains unachieved
Connection error through Android or iOS apps, and the indicator is glowing blue

Additional information

Additional information

Safety instructions
Warranty terms
Technical support chat
If you haven't found the answer, please contact our technical support engineer: Instagram or Telegram
Version of instruction F24

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