What control behavior options are available and what is the factory setting?

The thermostat offers four control behavior options: 2-position with 1K switching hysteresis, 2-position with 0.5K switching hysteresis, PID slow, and PID fast, configured via parameter P01. The factory setting is PID slow (value 4), which is ideal for most heating systems. Important: PID fast must NOT be used for oil boilers or electric mechanical actuators. (Pages 3, 4)