Parameters are set to default values after the thermostat is powered up. Adjust the parameter settings later in the mobile application.



Default value

Measured temperature value correction

Temperature offset value for the built-in room temperature sensor. If the temperature on the display does not match the measured room temperature, calibrate the temperature sensor using this parameter. The sensor can be offset by ±2.5 K.

0 K

Comfort setpoint minimum


Minimum heating setpoint for “Comfort”.


Comfort setpoint maximum


Maximum heating setpoint for “Comfort”.


Open Window detection

If set to On, this function detects if a window is opened and the room temperature drops rapidly. If yes, heating is switched to OFF mode.

The thermostat resumes automatic operation when:

  • The room temperature rises faster than 1 °C/h.
  • The automatic schedule changes via the mobile application.
  • The setpoint is adjusted either locally or via the mobile application.
  • 20 minutes have passed even if the window is still open.


Valve exercising

If set to On, the parameter activates valves periodically (2 min per week) to prevent valve seizing after valve inactivity for at least one week. This function is also active when the thermostat is in OFF mode.


Control behavior

The thermostat offers the following temperature control modes:

  • 2-position, 1 K
  • 2-position, 0.3 K
  • TPI slow
  • TPI medium
  • TPI fast

The first two control modes adopt a 2-position control algorithm while the last three TPI (Time Proportional Integral) control algorithm:

  • 2-position control switches on and off heating within a switching differential as per the comparison between setpoint setting and the measured room temperature.
  • TPI control switches on and off heating periodically. Both period and pulse length of the control signal (PWM) are determined by the setpoint and the measured room temperature.

Different control modes are for different applications. See the following for more details.

TPI slow

2-position, 1 K

  • 2-position controller with 1 [K] switching hysteresis
  • For systems with small capacity that appear slow
  • For applications requiring extended runtimes or where frequent switching causes problems
  • For difficult control loops where hunting may result

Typical applications:

  • Dry floor heating
  • Heat pumps
  • Electric heating with contactors

2-position, 0.3 K

  • 2-position controller with 0.3 [K] switching hysteresis
  • For general control. Provides better comfort than 1 [K] switching hysteresis
  • Can also be used for difficult control situations.

TPI slow

TPI control behavior for slow heating systems requiring longer minimum On times and limited numbers of switching cycles per hour.

Typical applications:

  • Wet floor heating, oil-fired boilers
  • Can be used for all other types of heating applications (alternative setting)

Minimum switch-on/off time

> 4 minutes

Minimum period

Approximately 12 minutes

TPI medium

TPI control behavior for general heating applications such as radiators and thermal actuators.

Minimum switch-on/off time

> 1 minute

Minimum period

Approximately 20...25 minutes

TPI fast

TPI control behavior for fast heating systems tolerating a high number of switching cycles.

Typical applications:

  • Electric heaters with current valve
  • Gas boilers
  • Fast thermal actuators

Minimum switch-on/off time

> 1 minute

Minimum period

Approximately 6 minutes


Do not use TPI fast for oil boilers or electric mechanical actuators!