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VEMER - VE452900 - Chronos Nero programmable thermostat, wall-mounted, touch screen, battery operated
The VEMER Chronos Nero (VE452900) is a wall-mounted digital smart thermostat with an elegant touch-screen interface and a large blue backlit LCD display. The four touch icons placed at the bottom of the screen ensure intuitive operation and give the device a sleek, modern look suitable for any residential or commercial environment.
Weekly programming and energy saving
Thanks to its weekly scheduling with 1-hour resolution, Chronos Nero lets you set specific heating or cooling time slots, reducing energy waste when away from home or during the night. The thermostat supports 3 settable temperatures plus antifreeze and manual mode, with ON-OFF or proportional regulation and an adjustable hysteresis from 0.1 to 1 °C.
Remote switching and configurable input
The configurable digital input allows connection of an external temperature probe or a telephone dialler, enabling remote power on/off of the system. The relay output is a heat-exchange (changeover SPDT) contact rated 5 A at 250 Vac, suitable for driving boilers, valves or air-conditioning units.
Keypad lock and user-friendly functions
- Password-protected keypad lock, ideal for public installations
- Summer and Winter operating modes
- Antifreeze, timing and delay functions
- Automatic daylight saving/standard time changeover
- Temperature measurement accuracy 0.5 °C, resolution 0.1 °C
Power supply and technical data
Powered by 2 × AAA 1.5 V alkaline batteries with up to 12 months autonomy and 1 minute of power reserve. IP40 protection, ErP Class IV, operating temperature 0 ÷ 50 °C. VEMER also offers the Set Chronos RF Nero kit, combining the thermostat with the RX.16A remote actuator.
| Manufacturer | VEMER |
|---|---|
| Manufacturer code | VE452900 |
| Thermostat type | Programmable |
| Application | Room |
| Operating mode | Heating + cooling |
| Mounting | Surface (wall) |
| Programmable | Weekly |
| Power supply type | Battery AAA |
| Supply voltage | 2 × AAA 1.5 V alkaline (not rechargeable) |
| Contact type | Heat exchange (changeover SPDT) |
| Switching current | 5 A at 250 Vac |
| Number of outputs | 1 |
| Sensor location | Internal + external |
| Hysteresis | 0.1 ÷ 1 °C |
| Minimum Temperature | 2 °C |
| Maximum Temperature | 50 °C |
| Connectivity | Wired (none) |
| Voice assistant | None |
| Communication protocol | None |
| Display type | LCD backlit |
| IP degree of protection (IEC 60529) | IP40 |
| Operating temperature | 0 to 50 °C |
| Backup time | 1 minute |
| ErP class | IV |





