1. Introduction
This user manual provides comprehensive instructions for the installation, operation, and maintenance of your Jung TR UD LS 231 WW Universal Thermostat. Please read this manual carefully before installation and use to ensure proper function and safety. Keep this manual for future reference.
The Jung TR UD LS 231 WW is a universal room thermostat designed for precise measurement and regulation of room temperature. It features a clear backlit display and supports both heating and cooling functions.
2. Safety Information
Always observe the following safety precautions to prevent personal injury or damage to the device:
- Installation and electrical connections must only be performed by a qualified electrician in accordance with local regulations and standards.
- Before any installation or maintenance work, ensure the power supply to the thermostat is disconnected at the main circuit breaker.
- Do not expose the thermostat to moisture, extreme temperatures, or direct sunlight.
- Do not open or attempt to repair the device yourself. Refer all servicing to qualified personnel.
- Ensure proper ventilation around the thermostat to prevent overheating.
3. Product Overview
The Jung TR UD LS 231 WW thermostat features a user-friendly design with a clear digital display and intuitive controls.
Figure 3.1: Jung TR UD LS 231 WW Universal Thermostat Front View
The image displays the Jung TR UD LS 231 WW Universal Thermostat. It features a white frame and a clear digital display. The display shows a temperature reading of 21.0°C, indicates 'AUTO' mode, and the current time as 14:31. Below the main display, there are four control buttons: a mode button (represented by a square with a line), a minus button, a plus button, and a checkmark button. A small flame icon is visible on the right side of the display, indicating heating status. The overall design is clean and functional.
Display Elements:
- Temperature Display: Shows the current room temperature and setpoint.
- Mode Indicator: Displays the current operating mode (e.g., AUTO, Manual).
- Time Display: Shows the current time.
- Heating/Cooling Indicator: Icons indicating active heating (flame) or cooling.
Control Buttons:
- Mode Button (Square with line): Used to cycle through operating modes.
- Minus (-) Button: Decreases temperature setpoint or navigates menu options.
- Plus (+) Button: Increases temperature setpoint or navigates menu options.
- Confirm (Checkmark) Button: Confirms selections or enters settings.
4. Installation
The thermostat is designed for mounting in a standard flush-mounted box according to DIN 49 073. It requires a 230 V AC power supply and an N conductor.
4.1 Wiring
Warning: Ensure power is disconnected before wiring. Incorrect wiring can cause damage to the device or pose an electrical hazard.
- Connect the 230 V AC power supply to the designated terminals. An N conductor is required.
- Connect the two-wire heating/cooling system to the relay output terminals. The relay is potential-free.
- Refer to the wiring diagram provided with the product packaging for specific terminal assignments.
4.2 Mounting
- After wiring, carefully place the thermostat into the flush-mounted box.
- Secure the thermostat using screws. This model uses screw fixing and does not require fixing claws.
- Attach the front cover and frame securely.
5. Operating Instructions
5.1 Initial Power-On
Once power is restored, the thermostat display will illuminate. It may show default settings or prompt for initial setup (e.g., time, date).
5.2 Setting the Temperature
- In normal operating mode, use the Plus (+) and Minus (-) buttons to adjust the desired temperature setpoint.
- The temperature can be set in 0.5 °C increments within the range of 5 °C to 30 °C.
- The display will show the new setpoint temporarily, then revert to the current room temperature.
5.3 Changing Operating Modes
Press the Mode Button (Square with line) to cycle through available operating modes, such as:
- AUTO: Operates according to the programmed schedule.
- Manual: Maintains a constant temperature set by the user.
- OFF/Standby: Turns off heating/cooling functions.
Confirm your selection with the Confirm (Checkmark) button if prompted.
6. Programming Modes
The Jung TR UD LS 231 WW thermostat offers programmable features to optimize energy consumption and comfort. Specific programming steps may vary; refer to the detailed instructions in the full product manual for advanced settings.
6.1 Setting Time and Date
Typically, this is the first step after installation or a power outage. Access the time/date setting menu by pressing and holding the Mode Button or a combination of buttons as indicated on the display.
- Use the Plus (+) and Minus (-) buttons to adjust values.
- Use the Mode Button or Confirm (Checkmark) button to move between fields (hours, minutes, day, month, year).
- Confirm all settings to save.
6.2 Creating a Weekly Schedule
The thermostat allows you to set different temperature setpoints for various times of the day and days of the week.
- Enter the programming menu (consult the full manual for specific button sequences).
- Select the day or group of days you wish to program.
- Define time periods and their corresponding desired temperatures.
- Save the schedule.
7. Maintenance
7.1 Cleaning
To maintain the appearance and functionality of your thermostat:
- Wipe the surface with a soft, damp cloth.
- Do not use abrasive cleaners, solvents, or chemical sprays, as these can damage the plastic and display.
- Ensure no liquid enters the device.
7.2 Power Reserve
The thermostat has an internal lithium cell providing a power reserve of approximately 10 years. This ensures that time and program settings are retained during short power outages. If the display remains blank after a prolonged power outage, the internal battery may need professional replacement.
8. Troubleshooting
If you experience issues with your thermostat, consult the table below for common problems and solutions. For problems not listed or if solutions do not resolve the issue, contact qualified service personnel.
| Problem | Possible Cause | Solution |
|---|---|---|
| Display is blank. | No power supply; internal battery depleted. | Check circuit breaker. If power is present, internal battery may need replacement (professional service recommended). |
| Thermostat not controlling heating/cooling. | Incorrect wiring; wrong operating mode; setpoint not reached. | Verify wiring (power off first). Check operating mode (e.g., AUTO, Manual). Adjust setpoint to be above/below current room temperature. |
| Temperature reading seems inaccurate. | Thermostat located near heat source/draft; sensor obstruction. | Ensure thermostat is not exposed to direct drafts, sunlight, or heat sources. Clean any dust from sensor openings. |
9. Specifications
| Feature | Specification |
|---|---|
| Model Number | TR UD LS 231 WW |
| Brand | Jung |
| Power Supply | 230 V AC |
| Power Consumption | Approx. 1.2 W |
| Switching Current | 10 mA to 10 (4) A at 230 V AC |
| Temperature Setting Range | +5 °C to +30 °C |
| Temperature Display Resolution | 0.1 °C |
| Differential Value | 0.5 K (Adjustable) |
| Output | Relay (Normally Closed), Potential-free |
| Connection Type | Two-wire, N conductor required |
| Power Reserve | Approx. 10 years (Lithium cell) |
| Mounting | Screw fixing, for flush-mounted box (DIN 49 073) |
| Material | Thermoplastic |
| Color | Alpine White |
| Dimensions (Package) | 9.6 x 8.4 x 8.2 cm |
| Weight (Item) | 200 g |
| Special Features | Backlit display, Cooling function, Smartphone control support (via external system), Remote control (optional) |
10. Warranty and Support
Jung products are manufactured to high quality standards. For information regarding warranty terms and conditions, please refer to the documentation provided with your purchase or visit the official Jung website.
For technical support, spare parts, or service inquiries, please contact your local Jung distributor or authorized service center. Please have your model number (TR UD LS 231 WW) and purchase details ready when contacting support.
Spare parts availability information is currently unavailable through general product listings. Please inquire directly with Jung or an authorized dealer.
