Nest sanity check

[TargetDummy]

Hi all,

Just about to purchase the 3rd gen Nest Heat Link & Thermostat but first I thought it would be a good idea to do a little research on how it works and how I would replace the existing setup. I've drawn out how the current system works and how I propose to install the new system. Wondering if more knowledgeable installers could check to see if I have everything covered.

Many thanks.

Wiring

• TargetDummy
• 25 Oct 2017

Wiring1

• TargetDummy
• 25 Oct 2017
• 2

 

[stem]

It all looks good to me. I assume the brown loops between terminals 2 & 3 and 5 & 6 represent the internal switching of the Heatlink and not wires that you plan to add.

 

[TargetDummy]

Stem, yes that is correct. The loops between 2 & 3 and 5 & 6 represent the internal switching - it helps me understand the path through the wiring. Thanks for your comment

 

[Echo the husky]

but first I thought it would be a good idea to do a little research on how it works

Top marks for doing that!

 

[stem]

Also, it ties up the original ahem....... untidy installation nicely too

 

[TargetDummy]

Top marks for doing that!

Always pays to understand what you're doing before spending time and money . I've read too many threads along the lines of "bought a nest/hive, trying to fit it and nothing's working".

 

[TargetDummy]

Also, it ties up the original ahem....... untidy installation nicely too

I inherited the current installation when I bought the house. It works but it is a bit of a mess with a few wires in the timer, thermostat and wiring centre not connected to anything and not labelled correctly. Luckily I can use a multimeter so I could determine the current situation and plan for a replacement. The main reason for doing this is the current Honeywell thermostat/timer temperature sensor isn't very accurate and the lcd screen is failing so instead of buying a direct replacement, I thought I'd look at alternatives.

 

[TargetDummy]

Installed & working

20171027_174508

• TargetDummy
• 27 Oct 2017

 

[Echo the husky]

That's good news, now turn it down!!

 

[TargetDummy]

I'd love to, but I'm outnumbered 3 to 1 - wife, daughter & grand daughter