1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your Wengart WG505 Digital Thermostat. Designed for electric underfloor heating systems, this programmable thermostat offers precise temperature control and energy efficiency for a comfortable living environment.
The WG505 features a large LCD touchscreen display, capacitive touch buttons, and supports both manual and programmable modes. It is equipped with internal and external sensors to ensure accurate temperature readings and enhanced safety.
Figure 1: Front view of the Wengart WG505 Digital Thermostat, showing its large LCD display and touch buttons.
2. Safety Information
Please read all safety warnings and instructions carefully before installing or operating this device. Failure to follow these instructions may result in electric shock, fire, or other hazards.
- Installation must be performed by a qualified electrician in accordance with local electrical codes and regulations.
- Always disconnect power at the circuit breaker before installing or servicing the thermostat.
- Do not expose the thermostat to water or excessive humidity.
- Ensure the thermostat is compatible with your heating system's voltage and current requirements (AC 90-240V, Max 16A).
- Keep out of reach of children to prevent accidental operation, especially when the button lock function is not active.
3. Product Specifications
| Feature | Specification |
|---|---|
| Model Number | WG505 |
| Operating Voltage | AC 90~240V 50/60Hz |
| Power Consumption | 2 W |
| Max Current | 16A (3600W) |
| Temperature Setting Range | 5 ~ 70 ℃ (Adjustable to 20-70 ℃) |
| Switching Differential | 0.5 ~ 5 ℃ (Factory setting ± 1 ℃) |
| Ambient Temperature | -5 ~ 50 °C |
| Display Accuracy | ± 0.5 °C |
| Control Accuracy | ± 0.5 °C |
| Measurement Range | 1 ~ 70 °C |
| Buttons | Capacitive Touch |
| Internal Sensor | NTC 10k @ 25℃ |
| Protection Rating | IP20 |
| Housing Material | Inflammable Polycarbonate (PC) |
| Dimensions (L x W x H) | 86 x 86 x 27 mm |
| Weight | 238 g |
| Installation Hole Distance | 60 mm |
| Installation Method | Wall Mounting (Flush-mounted) |
| Color | Silver/White |
| Connectivity | Wired |
Figure 2: Product dimensions of the Wengart WG505 Digital Thermostat, showing front, side, and rear measurements.
4. Installation Guide
The Wengart WG505 thermostat is designed for flush-mounted wall installation and is compatible with standard 86x86mm round boxes or 60mm European boxes. Ensure power is disconnected before proceeding.
4.1 Wiring Diagram
Refer to the following diagram for correct wiring. The thermostat supports both internal and external NTC sensors. The external sensor is typically used for floor temperature measurement and acts as an additional safety feature.
Figure 3: Wiring diagram for the Wengart WG505 Digital Thermostat, illustrating connections for the external sensor, heating wire, and AC 230V power supply.
- NTC (1, 2): Connect the external NTC temperature sensor here.
- L1, N1 (OUT): Connect to the heating load (e.g., heating mat/cable). Max 16A.
- N, L (AC 230V): Connect to the main AC 230V power supply.
- Ensure all connections are secure and insulated. The cable lugs can accommodate 2 x 1.5 mm² or 1 x 2.5 mm² wires.
4.2 Mounting the Thermostat
- Prepare the wall box (86x86mm or 60mm European standard).
- Connect the wires according to the wiring diagram (Figure 3).
- Carefully push the thermostat into the wall box, ensuring wires are not pinched.
- Secure the thermostat to the wall box using the provided screws.
- Attach the front panel of the thermostat.
- Restore power to the circuit.
5. Operation
The WG505 thermostat offers intuitive control via its touch buttons and clear LCD display. It supports both manual and programmable modes.
Figure 4: Detailed analysis of the Wengart WG505 Digital Thermostat's LCD screen, labeling various indicators such as room temperature, set temperature, heating status, and mode icons.
5.1 Display and Buttons
- LCD Display: Shows current room temperature, set temperature, time, day of the week, heating status, and various mode indicators.
- Power Button (⏻): Turns the thermostat ON/OFF.
- Mode Button (↻): Switches between Manual Mode and Programmable Mode.
- Clock Button (⏱): Enters time and program settings.
- Up Button (▲): Increases temperature or navigates menu options.
- Down Button (▼): Decreases temperature or navigates menu options.
5.2 Setting Time and Day
Press and hold the Clock Button for 3 seconds to enter time setting mode. Use the Up and Down buttons to adjust the hour, minute, and day of the week. Press the Clock Button again to confirm each setting and move to the next.
5.3 Manual Mode
In Manual Mode, you can directly set the desired temperature. Press the Mode Button until the manual mode icon (often a hand or 'M') is displayed. Use the Up and Down buttons to adjust the target temperature. The thermostat will maintain this temperature until changed or switched to another mode.
5.4 Programmable Mode (Weekly Circulation)
The thermostat supports weekly programming with 6 daily events, allowing you to set different temperatures for various times of the day and week.
Figure 5: Example of custom programming for the Wengart WG505 Digital Thermostat, showing time periods, symbols, start times, and default temperatures for working days and weekends.
- Press the Mode Button until the programmable mode icon (often a calendar or 'P') is displayed.
- Press and hold the Clock Button for 3 seconds to enter program setting mode.
- Use the Mode Button to cycle through the days (Monday-Friday, Saturday, Sunday) and events (e.g., Morning, Go out, Go home, Night).
- Use the Up and Down buttons to adjust the start time and desired temperature for each event.
- Press the Clock Button to confirm each setting and move to the next.
- Once all settings are complete, the thermostat will automatically follow the programmed schedule.
5.5 Advanced Settings (Calibration, Sensor Selection, Differential)
The thermostat has advanced settings accessible through a specific key combination (refer to the full manual if this is not sufficient). These include:
- Temperature Calibration: If the displayed temperature differs from the actual room temperature, you can calibrate it with a precision of 0.1 °C.
- Sensor Selection: Choose between the internal sensor, external sensor, or both. When both are used, the external sensor provides an additional safety limit for floor temperature.
- Start Temperature Difference: Adjust the hysteresis (difference between turn-on and turn-off temperatures) from 0.5 to 10 °C. For example, if set to 1 °C with a target of 20 °C, heating turns off at 21 °C and on at 19 °C.
- Power-off Memory: The thermostat retains all settings even after a power outage.
- Child Lock: Activate this feature to disable all buttons, preventing accidental changes by children. Look for a lock icon on the display.
- Backlight: The white backlight illuminates when operated and turns off automatically after 30 seconds of inactivity.
6. Maintenance
The Wengart WG505 Digital Thermostat requires minimal maintenance.
- Cleaning: Wipe the display and casing with a soft, dry cloth. Do not use abrasive cleaners, solvents, or spray directly onto the thermostat.
- Inspection: Periodically check the wiring connections for any signs of wear or looseness. Ensure the thermostat is securely mounted.
- No user-serviceable parts inside. Do not attempt to open or repair the unit yourself.
7. Troubleshooting
If you encounter issues with your Wengart WG505 thermostat, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Thermostat display is blank. | No power supply. | Check the circuit breaker and ensure the thermostat is correctly wired to the AC 230V supply. |
| Heating not turning ON/OFF as expected. | Incorrect mode (Manual/Programmable). Temperature differential setting. Sensor issue. | Verify the thermostat is in the desired mode. Adjust the start temperature difference. Check sensor connections and functionality. |
| Buttons are unresponsive. | Child lock activated. | Deactivate the child lock feature (refer to the full manual for specific instructions on disabling the lock). |
| Inaccurate temperature reading. | Thermostat needs calibration. Sensor placement issue. | Use the temperature calibration function in advanced settings. Ensure sensors are correctly installed and not obstructed. |
| Display backlight not working. | Normal operation (auto-off after 30s). | The backlight is designed to turn off after 30 seconds of inactivity. It will illuminate upon touch. If it never lights up, contact support. |
If the problem persists after trying these solutions, please contact Wengart customer support.
8. Warranty and Support
For warranty information and technical support, please refer to the documentation provided with your purchase or contact Wengart customer service directly. Keep your purchase receipt as proof of purchase.
Manufacturer: WENGART ELECTRIC CO. LTD
For further assistance, visit the official Wengart website or contact your retailer.