The PNI CT60 wireless thermostat turns the heating system on and off based on a temperature limit and a preset time period. The thermostat has 3 operating modes: Scheduled, Manual and Holiday (anti-freeze). In the programmed mode, 4 operating periods can be set for each day of the week. The advanced settings menu allows you to set parameters for different functions: Hysteresis, anti-freeze temperature, child protection function, open window function, reset, etc. If the child protection function has been activated in the advanced settings, the thermostat keys will lock as soon as the screen backlight turns off to prevent inadvertent temperature change. With the anti-freeze function you can leave the boiler quietly on account of the smart thermostat PNI CT60. From the advanced settings menu, set a temperature level between 5 ° C and 15 ° C, a temperature that will be maintained throughout your absence from home. If the QWD function has been activated from the advanced settings, the thermostat will turn off the heating if the room temperature drops suddenly (adjustable level). This sudden drop in temperature occurs when a window or door is opened while the boiler is operating. The OP icon appears on the screen. The device will return to its original operating mode after 30 minutes.