WiFi Thermostat Wiring

[sgreenwood1]

I may have a donated ‘nest e’ system coming my way.

Looking at the wiring diagram am I correct in thinking the heat link hooks up as per attached.

Presumably the nests thermostat is powered by separate mains adapter?

 

[RandomGrinch]

I may have a donated ‘nest e’ system coming my way.

Looking at the wiring diagram am I correct in thinking the heat link hooks up as per attached.

Presumably the nests thermostat is powered by separate mains adapter?

Sorry, I thought the nest e heat link was battery powered (although it may depend on model?).

 

[sgreenwood1]

Sorry, I thought the nest e heat link was battery powered (although it may depend on model?).

It seems so.

Presumably I cap the brown & blue wires off if I took the ‘e’?

It’s not ideal because the batteries may run out whilst away although the ones in the Hive last and I could use lithium to extend life.

 

[RandomGrinch]

It seems so.

Presumably I cap the brown & blue wires off if I took the ‘e’?

It’s not ideal because the batteries may run out whilst away although the ones in the Hive last and I could use lithium to extend life.

Yup, they are lithium and they will last ages!
Again, yes - isolate the wires safely.
...and if it was donated, all the better!

 

[sgreenwood1]

So the Nest 'E' has arrived.

I've set this up so it should be a case of wiring it in and switching on when I travel to Italy in a fortnight.

It took a while - the Nest App knew I wasn't in Italy and that I was in range of a Nest Protect device I own. This meant I had to temporarily change the address of the house in Italy to the UK and set it up via a hotspot before manually forcing it to connect to my wifi (wifi in Italy has the same ID to make life easier). Not particularly relevant to the next question but I'm writing it down in case someone is having similar difficulties with Nest.

Anyway.... during my troubleshooting I noticed the heatlink for the 'E' has a micro-USB port.

I plugged this in to a standard power adapter and it works without batteries - see photo.

I asked Google who said it was for 'troubleshooting and backup' but the device works well in this state.

Does anyone know if it would do the heatlink undue harm to leave it powered via USB as opposed to 2 x AA's?