The RC Wave+ will prompt you to set the time when you first turn it on. Whenever you use the app to communicate with the radiator, the time will synchronise with your smart device. However, if you need to adjust via the keypad, this is available as the first step in the programming menu. You can leave the menu to time out after setting the time, so you don’t need to go through the rest of the programming steps.
Instructions for setting the time via the keypad are included in the RC Wave+ Manual.