The product activates the connection mode when it is plugged in for the first time.
If you have exceeded the switch-on mode time, you can reactivate it as described in the manual:
The side button on the WiFi HUB has two push buttons. One opens and closes the boiler contact relay, with a characteristic "clack" sound. The other button is the configuration button. Long press this configuration button for more than 5 seconds to activate the connection mode.