No, the DuoFern Room Thermostat 9485 / 9485-1 can be used completely independently. You have the option of setting 4 different setpoints with up to 6 times per day on the device.
If you want to set the time points via the SmartHome Box, the room thermostat must be set to 1 (receiver) under menu item 9-9-2. This ensures that no more time settings can be made in menu item 2.