Installation of Nest Thermostat Gen-4

[Hani_B]

Can the new Gen-4 Thermostat be installed without any wiring?  E.g. just consume power via usb or power adapter plugged to the wall?

[Ashepherdson]

No.... You still need to wire it so it can control your HVAC system.

[Patrick_Caezza]

@Hani_B 

Where are you located? US/Canada or UK/Europe? The 4th Gen is not compatible in the UK/Europe area.

No, it must be connected to at least two terminals with R, Rh, or Rc being one of them and W or Y being the other one. 

[Hani_B]

I am based in the UK.  Thanks for your reply @Patrick_Caezza, I think that settles it.

[Hani_B]

I understand that there should be a receiver unit connected to the boiler to control the boiler.  But I was referring to the thermostat itself, does that need connecting to any wires, other than power supply?

[Ashepherdson]

Depends on your setup, if you had a wireless controller or a wired one.   Here is the installation guide which should help! https://nest.com/support/images/misc-assets/Nest-Thermostat-Installation-Guide-UK.pdf

[Hani_B]

This link refers to the Gen-3 thermostat.  Would it apply to Gen-4 also?  Is there anyone I can speak to because these responses are not helpful at all.

[Ashepherdson]

You can contact nest support directly, this is just a community forum, and the information we can give will depend on what we are given.  Nest support may be able to further assist you, 

https://support.google.com/googlenest/gethelp?hl=en

Option 3 is contact options , you can chat or request a call!