Radiator Thermostat – Flex

Yes, the use of high-quality rechargeable batteries with low self-discharge is recommended, for example Panasonic eneloop. Please note that the specified battery life will be reduced when using rechargeable batteries.

Window open detection works in combination with Homematic IP window and door contacts. As soon as the contact registers that a window is open, it sends a signal to the radiator thermostat. This then automatically reduces the heating output to save energy while the window is open. Without the window and door contact, detection is triggered by a sudden drop in temperature in the room, whereupon the thermostat also reduces the heating output.

No, when replacing Homematic IP radiator thermostats, no water can escape from the radiator. The thermostat only controls the opening and closing of the valve and does not intervene in the heating system. As long as the valve itself is intact and remains closed, there is no risk of water escaping. The thermostat can be installed and removed safely and dry without having to drain the heating water.

Homematic IP Radiator Thermostats are compatible with most standard radiator valves, including valves with an M30 x 1.5 thread. Adapters for Danfoss valves (RA, RAV and RAVL) are included for easy installation.

Push-to-Pair is a Homematic IP technology that makes it possible to connect devices directly to each other without a central control unit. With a simple press of a button, the supported devices are paired and can communicate with each other immediately.

In practice, you simply press the system button on the respective devices, which automatically recognize and connect. Within a few seconds, the devices are paired and ready for use without the need for complex installation.

The valve protection function ensures the radiator thermostat actuators are periodically activated during periods without temperature regulation, e.g. in summer, to prevent the valves from sticking. You can define the time interval (off, 1–28 days) as well as the activation duration (0–10 minutes).

Your Homematic IP climate control solution offers five operating modes:

• In automatic mode, the system controls the temperature according to the heating schedules you have defined and selected.
• In manual mode, you can manually regulate the room temperature independently of the heating schedules.
• In eco mode, which can be activated via the home screen on the app or via the Homematic IP Wall-Mount Remote Control, all or any rooms equipped with radiators or electric heaters are automatically lowered to a predefined eco temperature (reduction temperature), for example after pressing the wall-mount remote control when leaving the house.
• In party mode, you can maintain the room temperature at a certain temperature value for a precisely defined period of time.
• In holiday mode, you can lower the room temperature to a freely selectable temperature value until a time you define if you are going to be away for any length of time. In holiday mode, the temperature of the floor heating system is also lowered.

If the radiator is installed in an awkward location (e.g. behind a curtain or cupboard), the temperature measured by the sensor may deviate slightly from that in the room. If the thermostat is unable to compensate
for the difference, a general adjustment must be made using the temperature offset. The temperature offset can be set individually for every thermostat in each room in a range of +/- 3.5 °C.

If, for example, 18 °C is measured in the room when a temperature of 20 °C has been set, an offset of -2.0 °C must be set. An offset temperature of 0.0 °C is set in the factory.