JUNG BT1791 Room Thermostat Display Instruction Manual

JUNG BT1791 Room Thermostat Display

Product Information

Specifications

• Product Name: JUNG HOME Room Thermostat Display
• Art. No.: BT..1791..
• Website: www.jung.de/JUNGHOME

Product Usage Instructions

Safety Instructions
To ensure safe operation, follow these guidelines:

• Installation should be done by individuals with relevant knowledge and experience.
• Do not use the device if there is visible damage; disconnect it from the mains immediately.
• Read and keep the instructions for future reference.

Device Components
The device includes:

• Setpoint temperature, actual temperature, or current time display
• Programming menu
• Active mode indicator
• Operating area
• System insert
• Design frame

Icons in the Display
The display icons indicate:

• Automatic mode status
• Comfort and ECO temperature regulation
• Cooling and heating mode indicators
• Bluetooth network status

Intended Use
The device is designed for regulating temperature settings and operating heating and cooling systems.

Product Characteristics
After a mains voltage failure, all settings and time programs are retained.

Functional Description
The device supports heating and cooling modes, frost protection, and temperature drop detection for energy efficiency.

FAQ

• What should I do if the device shows visible damage?
  If the device exhibits any visible damage, it must not be used any longer. Immediately disconnect the device from the mains by switching off all associated circuit breakers.

• How can I activate the frost protection feature?
  To activate the frost protection feature, ensure that the temperature drop detection parameter is activated. This feature helps prevent unnecessary heating and energy wastage.

Safety instructions

To avoid potential damage, read and follow the following instructions: Installation only by persons with relevant knowledge and experience in the following areas:

• Five safety regulations and standards for the installation of electrical systems
• Selection of suitable tools, measuring devices, installation materials and, if necessary, personal protective equipment
• Installation of the installation material
• Connection of devices to the building installation under consideration of local connection conditions

Improper installation endangers your own life and the lives of people using the electrical system and there is a risk of serious damage to property, e.g. through fire. You are at risk of personal liability for personal injury and damage to property. Consult an electrically skilled person. Danger of electric shock. If the device exhibits any visible damage, it must not be used any longer. Immediately disconnect device from mains by switching off all associated circuit breakers.
Read the instructions in full, observe them and keep them for future reference.
You can find more information on JUNG HOME at www.jung.de/JUNGHOME

Device components

1. Setpoint temperature, actual temperature or current time
2. Programming menu
3. Active mode
4. Operating area
5. System insert
6. Design frame
7. JUNG HOME room thermostat display

Icons in the display

• ****Automatic mode is active.
• ****Temperature value is regulated to comfort temperature.
• ****Temperature value is regulated to ECO temperature.
• Cooling icon lights up : cooling mode, no cooling is taking place.
• Cooling icon flashes: cooling mode, cooling is taking place.
• Heating icon lights up: heating mode, no heating is taking place.
• Heating icon flashes: heating mode, heating is taking place.
• Bluetooth symbol lit up: device is part of a Bluetooth Mesh network.
• Bluetooth symbol flashing: device is in pairing mode or in the update process.

Icons of the operating area (4)

• ****Step back / display current time.
• ****Confirm input / display current time.
• ****Switch between manual operation and automatic operation.
• + / – Increase or reduce the displayed temperatures or times / navigation in menu.
• ****Call up and terminate the programming menu.

Intended use

• Manual and time-controlled regulation of the room temperature.
• Wireless connection to devices from the JUNG HOME system.
• Operation with system insert for room temperature control.
• Operation with system insert for switching.

Product characteristics

• Commissioning and operation using JUNG HOME app on mobile end device (smartphone or tablet) via Bluetooth.
• Up to 16 time programs for automatic heating.
• Manual/automatic mode switchover by means of JUNG HOME app or local operation.
• Automatic date and time update when connecting with smartphone.
• Setting a comfort, ECO, cooling and frost protection temperature.
• Adjustable setting range for min. and max. temperature value.
• Boost function: fast heating for max. 5 minutes.
• Illuminated segment display for easy reading.
• Display switch-off after 2 minutes or permanent indication available.
• Disabling of local operation.
• Integration of the load into areas (groups), main functions and scenes.
• Optimised heating up (temperature is reached at the set time), can be switched off.
• Adaptation to valves (deenergised open or deenergised closed).
• Supports internal and external temperature sensor.
• Temperature sensor offset (correction value for measured temperature).
• Controller output working method: pulse width modulation (PWM) or two-point.
• Bluetooth SIG Mesh for fully encrypted wireless communication and repeater function.
• Updating via JUNG HOME app.

Available by update in the future:
(You can find information on updates and dates at www.jung.de/JUNGHOME)

• Holiday program reduces heating costs in absence and heats the room before returning
• Time programs with sunrise and sunset (astro timer)

Behaviour after a mains voltage failure
All settings and time programs are retained.

If the device was not previously added to a Bluetooth Mesh network (project) using the JUNG HOME app, it switches to pairing mode for 2 minutes after the mains voltage returns and the Bluetooth symbol flashes on the display.

• Power failure shorter than power reserve (min. 4 hours)
  • Time and date are up to date
  • The following time programs are performed normally again but until then the temperature is controlled like before the power failure
• Power failure longer than power reserve (min. 4 hours)
  • The date and time have been reset and are updated automatically when connected to the app Alternatively, the correct time can also be entered directly on the display. Until this is carried out, no time programs are executed.
  • Temperature control is performed like before the power failure

Functional description

“Heating and cooling” operating mode
Modern heat pump systems often also provide the option of cooling rooms. This function is supported by the JUNG HOME room thermostat in “heating and cooling” operating mode. In this operating mode, the temperature is permanently regulated to the set cooling temperature during active cooling operation. There are no time programs in cooling mode. The cooling temperature can be changed only with the temperature parameters on the device (or with the setting in the app), not with the +/- buttons. In combination with a room thermostat insert, cooling mode is activated by applying the mains voltage to input terminal “C”. With switch inserts, cooling mode is activated by applying mains power to extension input “1”. In general, the heat pump features a corresponding output or a switch can be used.

Frost protection/temperature drop detection
The frost protection temperature is the minimum temperature to which the system can be regulated to avoid frost damage. In the event of a significant temperature drop, e. g. after opening a window, the temperature is set to the frost protection temperature for a maximum of 30 minutes to prevent unnecessary heating and wasting energy. For this, the temperature drop detection parameter ****must be activated.

Optimised heating up
Heating is started at most 4 hours before the switching time, so that the desired temperature has been reached at the switching time rather than starting to heat up at that time. The display icon **flashes during the heat-up phase.
Note:** Optimised heating up is designed for panel heating/radiators.

Temperature sensor offset ****
If the system detects that the displayed actual temperature differs from the general room temperature, this parameter can be used to enter a correction value in 0.5°C increments. The measured actual temperature is then corrected by this offset value.

Controller adaptation
The control principle should be set depending on the heating system. Two-point control: The output remains switched on until the selected setpoint temperature has been exceeded by 0.5 °C. The output will not be switched on again until the setpoint value is undercut by 0.5 °C. Since most heating systems respond very slowly, this type of control can entail temperature overshooting.
Pulse width modulation control ( ): Optimised for electrothermal valve drives,
e.g. TVA 230 NC WW: The output is not permanently actuated, but only for some time (pulse width) dependent on the difference between the target temperature and the actual temperature. This method brings the actual temperature gradually closer to the setpoint temperature. The cycle time is 15 minutes.

Valve adaptation ****
This parameter is used to adapt to the electrothermal valve drives. Some drives are either open (deenergised open, setting NO) or closed (deenergised closed, setting NC) when no supply voltage is applied.

Temperature sensor
The JUNG HOME room thermostat display features a built-in temperature sensor, which is used to detect the room temperature.
In combination with a room thermostat insert, a wired remote sensor can be connected, either to measure the room temperature or to limit the maximum floor temperature.
The following settings are possible.

• Internal sensor :
  The room temperature is measured with the internal temperature sensor or a JUNG HOME temperature sensor (if linked).

• Wired remote sensor :
  The room temperature is measured by the remote sensor that can be connected only to the room thermostat insert. The internal temperature sensor is deactivated.

• Internal sensor and wired remote sensor and :
  The room temperature is measured with the internal temperature sensor or a JUNG HOME temperature sensor (if linked). The floor temperature is measured by the remote sensor that can be connected only to the room thermostat insert to enable monitoring of the maximum floor temperature. If the maximum floor temperature is exceeded, the floor heating is switched off until the floor temperature has fallen below the maximum value again. This way, an unpleasantly hot floor is avoided.

Valve protection function
The function prevents the valve from becoming stuck in long periods without heating. For this purpose, the valve is opened and closed once a week at 11:00 am on Saturdays.

The device interrupts the heating process for five minutes after 60 minutes to prevent critical continuous operation.

Commissioning

Commissioning with app
Prerequisite: the JUNG HOME device has not yet been made a participant in a Bluetooth Mesh network; otherwise reset the device to factory defaults.
If a Bluetooth Mesh network (project) does not yet exist, start by creating a new project for the first JUNG HOME device in the JUNG HOME app.
If a Bluetooth Mesh network already exists, the project file for this network must be opened to pair the new device.

After switching on the mains voltage, the device is automatically in pairing mode for 2 minutes.

• Activate pairing mode manually:
  Press the ****button for more than 4 seconds until the icon Ʃ flashes on the display. Pairing mode is active for two minutes.

• Start the JUNG HOME app and select “new project” or “Add devices”.
  The app shows all devices in pairing mode.

• Select a device in the app.
  For the identification of a room thermostat in the app, its display lighting begins to flash.

• Add the device to the project

  • The symbol ****on the display lights up permanently to confirm the successful pairing.
  • If the symbol ****flashes fast on the display, this means pairing has failed and must be repeated.

The JUNG HOME app can then be used to link devices wirelessly, create time programs and configure the parameters and operation (see list of functions and parameters). Once the commissioning of the JUNG HOME project has been completed, hand over the project file to the customer.

Besides basic commissioning, the JUNG HOME app enables device updates and convenient operation of further individual configuration options:

• Link: A button, binary input or motion sensor can be controlled by linking it to a load (e. g. dimmer, socket, switching output, shutter, etc.). Several loads can be controlled together by linking them to an area or scene.
• Area: Different loads (e. g. dimmer, socket, switching output, shutter, etc.) can be grouped in an area to allow them to be controlled together.
• Scene: Different loads (e. g. dimmer, socket, switching output, shutter, etc.) can be grouped in a scene so that, by calling up a scene, each load assumes the load status stored in the scene.
• Automatic function: An automatic function can be used to control the locally connected load (no wireless link) by means of time programs. Depending on the device type, there are further automatic functions in JUNG HOME, such as hotel function, night light function, holiday program or switching thresholds.

Commissioning without app
A commissioning of the device is also possible without the app. In this case, however, you must set or confirm the data listed in the table. In the state as supplied, the year flashes in the display and the commissioning menu is activated.

• Briefly press the – or + button to change values or toggle between YES / No.
• A long press of the – or + button accelerates value changes.
• Press the ****button to go back in the menu.
• Press the ****button to apply the setting and call the next value. After editing the last parameter, all values will be saved and automatic mode will be invoked.

The device can then be added to a project at any time with the app (see Commissioning with the app) and the settings can be changed in the app.

1. Pulse width modulated control (PWM) = YES, two-point control = No

2. NC: Valve is deenergised closed.
   NO: Valve is deenergised open.

3. This parameter appears only when the device is set to “Heating and cooling”.

4. This parameter only appears if and have been set for the temperature sensor.

Wireless operation
Wireless operation is carried out with linked JUNG HOME devices or via the JUNG HOME App, which is also used to link JUNG HOME devices (see ‘Commissioning with app’).

Operation on the device

Increasing or reducing the room temperature

• Press the – or + button for less than 1 second.
  With every brief press of a button the setpoint temperature changes by 0.5 °C. The set value is retained in manual mode; in automatic mode it is retained until the next switching time is reached.
  In cooling mode, the – or + buttons cannot be used to change the setpoint temperature. The cooling temperature can be changed only with the temperature parameters on the device (or with the setting in the app).

If the display is switched off or has been set to indicate the actual temperature or time, the – or + button will have to be pressed a second time or even more before a change in the setpoint value takes place.

Press the – or + button for more than 1 second.
In heating mode, the stored setpoint temperature is retrieved:

• – = ECO temperature
• + = Comfort temperature

During a detected temperature drop, it is not possible to change the setpoint temperature for max. 30 minutes.

Automatic operation/manual operation
Pressing the  button toggles between automatic mode and manual mode. In automatic mode, the time programs specify the next setpoint temperature in each case. Furthermore, in automatic mode the – or + button on the device or the app can be used to specify a new setpoint temperature, but this temperature can be set only until the next switching time. In manual mode, all time programs are deactivated and the device permanently sets the temperature to the set setpoint temperature.

• If all time programs are deactivated, the device switches automatically to manual mode. Automatic mode cannot be activated.
• The setpoint temperature and the icon are shown in the display. Active heating is indicated by the flashing heating icon . If heating is not active, the icon lights up permanently. The icon indicates that the system is being regulated to the saved comfort temperature.

In manual mode, the  icon is displayed.

Activating the boost function
With the boost function, the output is switched on for a maximum of 5 minutes without temperature control action to obtain a temporary increase in temperature.

The boost function can only be activated while in heating mode and if no temperature drop has been detected.

• Press the ****button for longer than 4 seconds.
  The boost function is active. The display counts down from 300 seconds and then switches back to normal mode.

Press the ****button once again for more than 4 seconds to terminate the boost function prematurely.

Activating the holiday program**
The holiday program can be set and activated only with the JUNG HOME app. If the holiday program is active, the device switches to manual mode. The display shows the setpoint temperature for the holidays and the case symbol lights up. The holiday program is interrupted and the temperature set at that moment is maintained by the controller by briefly actuating the – or + button. The holiday program is restarted by briefly actuating the button. ** Available by update in the future (information on updates atwww.jung.de/JUNGHOME)

Programming menu overview

Press the button to call up or exit the programming menu.
Navigate through the menu with the – or + button and confirm the selection with the button.

• ****Activating/deactivating the button lock
• ****Setting the comfort temperature, ECO temperature and cooling temperature. Activating optimised heating up, temperature drop detection and setting a temperature sensor offset value
• ****Setting date, time and automatic summer time changeover

Activating/deactivating the button lock
Operation directly on the display is prevented by an active button lock. The button lock can be activated and deactivated on the device only as long as the “Operation lock” setting is not activated with the app.

• Press the button.
  flashes in the display.

• Press the ****button.
  No flashes in the display.

• Use the – or + button to change to YES and confirm with the button.
  The button lock is active and the symbol appears in addition to the normal indication.

Deactivate: Press and hold the – and ****buttons simultaneously for more than one second.

The operating lock can be activated alternatively with the same button combination that is used to deactivate it or with the app.

Setting the date and time

• Press the ****button.

• Select .

• Confirm with the ****button.
  The year flashes in the display.

• The date, time and automatic summer time changeover can be changed as described in the chapter “Commissioning without the app”.
  The time is automatically updated and the manual setting is overwritten each time a connection to the app is established.

Changing temperature parameters

• Press the ****button.

• Select –.

• Confirm with the button.
  The setpoint value for the comfort temperature flashes in the display.

• Change the setpoint value with the – or + button and confirm with the ****button.

• Use the same procedure to set the values for the ECO temperature and, if “Heating and cooling” is parameterised, the cooling temperature as well.

• Activate/deactivate optimised heating up and temperature drop detection .

• Set the temperature sensor offset value .

Changing control parameters
Various settings are made during initial commissioning to adapt the temperature control to local conditions. This menu item or the app can be used at any time to change these settings.

• Press ƣ and buttons simultaneously for longer than 10 seconds. While actuating the buttons, a countdown from 9 to 0 is displayed.
  , ****and YES or No appear in the display.

As described in the chapter “Commissioning without the app”, the parameters can be confirmed ( ****button) or changed (– or + button).

Local indication: setpoint temperature, actual temperature or time
After commissioning, the device indicates the setpoint temperature and switches off the display after 2 minutes without any operation. Alternatively, the actual temperature or current time can be displayed.
The display can also remain permanently switched on.

• Press the and buttons simultaneously for longer than 10 seconds.
  A countdown runs in the display. When “0” is reached, the actual temperature is shown in the display.
  The active temperature sensor is shown in the display when the actual temperature indication is selected.
  or and : The measured value comes from the internal temperature sensor or a linked JUNG HOME temperature sensor.
  : The measured value comes from the wired remote sensor connected to the system insert.

• Press the and buttons simultaneously again for more than 10 seconds.
  A countdown runs in the display. When “0” is reached, the current time is displayed.
  Use the same operating step to switch back to the target temperature indication.

• Press the and buttons simultaneously for longer than 10 seconds to switch the display to continuous operation.
  A countdown runs in the display. When “0” is reached, the display remains permanently.
  Use the same operating step to switch the display off again after 2 minutes. The display briefly turns dark to indicate confirmation.

In target or actual temperature indication mode, the or button can be pressed for more than 1 second to indicate the current time as long as the button is actuated. In actual temperature or time indication mode, the setpoint temperature can be temporarily displayed by briefly pressing the – or

• button.

Mounting and electrical connection
The communication of the JUNG HOME devices and linked mobile end devices is carried out in wireless mode within the range of the Bluetooth Mesh network.

Wireless signals can be affected in their range through:

• Number, thickness, position of ceilings, walls and other objects
• Material type of these objects
• High-frequency interfering signals

Observe the following fitting instructions to maximise the range:

• Plan the positions and number of JUNG HOME devices to keep the number of ceilings and walls between two devices as low as possible
• If JUNG HOME devices are installed on both sides of a solid wall, they should be positioned as close as possible to each other on the opposite sides of the wall. This keeps the attenuation of the wireless signal through the wall as low as possible
• When planning, observe the number of building materials and objects that attenuate the wireless signal strongly (e. g. concrete, glass, metal, insulated walls, water tanks, pipelines, mirrors, book cabinets, storage rooms and refrigerators) on the connection line between JUNG HOME devices is as low as possible
• Keep a distance of at least 1 m from devices that emit high-frequency signals (e. g. microwave, motors) or run with wireless signals at 2.4 GHz (e.g. WLAN router, baby monitor, IP cameras, wireless loudspeakers etc.)

DANGER! Electric shock when live parts are touched.
Electric shocks can be fatal.
Always disconnect before carrying out work on the device or load. For this, switch off all corresponding circuit breakers, secure against being switched on again and check that there is no voltage. Cover up adjacent live parts.

Prerequisite: The system insert is mounted and connected properly (see instructions for the relevant system insert).

• Fit the cover with design frame on the system insert.
• Switch on mains voltage.
  All display icons are briefly activated and the device must be commissioned (commissioning).

If Err appears in the display, the cover was previously connected to another system insert. To enable operation again, perform one of the following steps:

• Fit the display cover on the original system insert.
• Press the + and – buttons for more than 4 seconds.
  If this is not successful, the device must be reset to the default setting. The parameter settings and app and network connections are retained.

Resetting the device to the factory setting

• If local operation is disabled with the “operating lock” parameter, the default setting can be reset to only within two minutes after switching on the mains voltage.
  If the device has already been added to a project with the JUNG HOME app, it can be deleted from the app with the “delete device” function and simultaneously reset to the default setting.

• Press the and buttons simultaneously for 10 seconds.
  A countdown runs in the display. At “0”, the device is reset to the default setting.
  After resetting the device to the default setting, it must be removed from the app provided it has not already been deleted from the app.

Default setting

• The device regulates the temperature to comfort temperature.
• No time programs are present.
• Controller output for pulse width modulated control.
• Internal temperature sensor for room temperature measurement is active.
• Display switch-off after 2 minutes of inactivity without button actuation is active.

Button actuation overview

The prerequisite for actuation of the buttons is that no operating lock is set with the app.

Technical data

• Ambient temperature -5 … +45°C
• Transport temperature -25 … +70°C
• Storage temperature -5 … +45°C
• Relative humidity 20 … 70% (no moisture condensation)
• Accuracy per month ± 10 s
• Power reserve min. 4 h

The time is updated with every connection to the app

• Radiofrequency 2.402 … 2.480 GHz
• Transmission capacity max. 10 mW, Class 1.5
• Transmission range (inside the building) typ. 30 m
• Controller class (EU 811/2013) IV
• Contribution to energy efficiency 2%

This device includes an integrated battery. At the end of its useful life, dispose of the device together with the battery in accordance with the environmental regulations. Do not throw device into household waste. Consult your local authorities about environmentally friendly disposal. According to statutory provisions, the end consumer is obligated to return the device.

List of functions and parameters

The JUNG HOME app can be used to configure all functions of the JUNG HOME device and its behaviour in the Bluetooth Mesh project for the respective individual purposes.

Display (cover) settings Available by update in the future (information on updates at www.jung.de/JUNGHOME)

Load control settings

• Settings for automatic functions

Available by update in the future (information on updates at www.jung.de/JUNGHOME)

Temperature control settings

Available by update in the future (information on updates at www.jung.de/JUNGHOME)

Conformity
Albrecht Jung GmbH & Co. KG hereby declares that the radio system type art. no. BT..1791.. meets the directive 2014/53/EU. You can find the full article number on the device. The complete text of the EU Declaration of Conformity is available under the Internet address: www.jung.de/ce

Warranty

The warranty is provided by the specialist trade by statutory requirements.

ALBRECHT JUNG GMBH & CO. KG
Volmestraße 1
58579 Schalksmühle
GERMANY
Telefon: +49 2355 806-0
Telefax: +49 2355 806-204
kundencenter@jung.de
www.jung.de

References

• JUNG - Switches and systems
• JUNG - Konformitätserklärung
• JUNG - JUNG HOME New Items

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