Xenio has a secret control menu, not covered in any of their documentation
Entering that menubu pressing heat, -, menu, & + simultaneously and toggling the first item turns off the dreaded one hour heater limit, AND it looks like it
turns off the 6 hr delay
That may be a ‘serviceman’ menu that may be documented in the service manual. Some vendors release the information in the installarion manual, for others it is top secret - they want a callout fee to press a few buttons to reconfigure your system.
How are you using this functionality for HomeAssistant?