boiler man/sparky - can anyone tell me if this is wiring is correct: google nest

[kash]

Hey guys

Moving out of my flat tomorrow and I have to return the property to the orginal spec as part of my lease. I had google nest installed a while ago but cant remember how everything was originally connected. I've had a go at removing the nest and putting back the old thermostat (danfoss TP7000).

Here's what I did. Can anyone tell me if its correct to allow the heating to work as it did originally without the nest. If its wrong, please let me know what to do to fix it? what wires go where?

I need it back up and working tomorrow as i have inspection monday, so sharpish responses would be great if pssobile 🙂

Nothings been powered back on on yet until I made sure it was correct!

Nest WAS wired like this:

Removed it and connected it back like this: (dont worry, its going to go in a proper juntion box tomorrow)

The nest theromostat WAS wired like this:

undid it, and put the old termostat back like this:

 

[Masood]

As long as these two wires are in NO and Common you should be fine. The usual caveat applies that without actual test equipment and being onsite we cannot know that the use of core colours has been consistent in the existing installation, so take precautions, test for dead before touching anything, and be 100% sure which cores are permanent and switched lives before applying power.

 

[kash]

Thanks, but did you mean ON?

 

[jonnyswamp]

He meant Normally Open

 

[Masood]

As Jonny said. There will be 3 terminals, marked NO, NC and C. You need NO and C.

 

[Riley]

If you're unsure about NO please get a sparky or a heating engineer

 

[kash]

All sorted.

I was just being silly and hadnt realised that I connected grey wire to 'of' instead of on 🙂

thanks for the help!