[Technology] Nest thermostat

[lost in london]

I've bought myself a Nest learning thermostat to replace a wireless thermostat. Wireless thermostat is new (installed by the plumber as part of some works we recently did to the house), but rubbish. I had hoped the installation would be straightforward, but after opening the box I've lost my bottle.

I'm not going to be wiring in the thermostat itself, just the heat link.

Blue and brown wires I'm fine with connecting, just not sure what to do with the black and grey wires

Don't much want to pay someone to install it before asking whether this is something I should be able to do myself with a bit of guidance, any thoughts?

 

[Taybha]

I'm clueless at this sort of thing as well but i would suggest not touching the black wire for a bit until somebody with a CSE in electrocution level shows up .

 

[el punal]

New signing in January to play up front with Florin Andone?

 

[lost in london]

I'm clueless at this sort of thing as well but i would suggest not touching the black wire for a bit until somebody with a CSE in electrocution level shows up .

Based on no knowledge or experience, i'm 80% sure it's easy. Trouble is that 20% is deadly.

 

[Rowdey]

I'm not wholly up on Nest, but..

Take pic of existing stat wiring before doing anything else.. and say what is in where. Whats the wireless stat make/model, and why didnt you like it ? (got to see whether it's good enough as payment for tech advice.. )

What boiler system do you have, just a combi or heating and hot water cylinder ? (Single or two channel)

 

[PoG]

I asked https://www.diynot.com when installing my Hive thermostat. They provided me step for step instructions so might be worth asking there.

 

[lost in london]

I'm not wholly up on Nest, but..

Take pic of existing stat wiring before doing anything else.. and say what is in where. Whats the wireless stat make/model, and why didnt you like it ? (got to see whether it's good enough as payment for tech advice.. )

What boiler system do you have, just a combi or heating and hot water cylinder ? (Single or two channel)

It's a Delta Dore: https://www.manomano.co.uk/thermost...dio-delta-dore-6053035-404174?model_id=404174

Not being able to programme the times when it comes on and off makes it fairly useless for me. You'd be very welcome to it!

 

[lost in london]

So I get that blue is neutral and brown is live. I then need to "Connect the heating control circuit to the Heat Link 1 (normally closed/satisfied), 2 (common), 3 (normally open/call-for-heat) as needed."

Trouble is, how do I know where to put the black cable and the grey cable!

 

[FloatLeft]

I installed my Nest myself with a Worcester 28i Boiler. When I get home I can take some pics of the wiring if that helps?

 

[Goldstone1976]

So I get that blue is neutral and brown is live. I then need to "Connect the heating control circuit to the Heat Link 1 (normally closed/satisfied), 2 (common), 3 (normally open/call-for-heat) as needed."

Trouble is, how do I know where to put the black cable and the grey cable!

Very nice manicure. Which salon do you use?


Sorry.

 

[lost in london]

Very nice manicure. Which salon do you use?


Sorry.

If you avoid any manual labour it’s easy to keep them just so.

 

[LamieRobertson]

Anything that potentially would set fire to the house or flood it I avoid, better to pay someone so you can blame them instead

 

[Rowdey]

View attachment 102711

View attachment 102712

So I get that blue is neutral and brown is live. I then need to "Connect the heating control circuit to the Heat Link 1 (normally closed/satisfied), 2 (common), 3 (normally open/call-for-heat) as needed."

Trouble is, how do I know where to put the black cable and the grey cable!

Wiring - yes - if you carefully.. take of the cover of the fixed unit from the wall, what do you have there.?

 

[lost in london]

Wiring - yes - if you carefully.. take of the cover of the fixed unit from the wall, what do you have there.?

 

[Rowdey]

View attachment 102721

Looks two channel then - It's not a complete rats nest at least, but get someone in to take headache away - Or get Nest to install...for only £10..

 

[Goldstone1976]

View attachment 102721

Since we care about which cable is inserted into which terminal, we have a permutation problem, not a combination one. So, we use P = N!/(N-R)! , where N = the number of possible terminals = 9, and R = the number of cables to terminate = 4. = 3024 permutations.

= get a pro in.

 

[Justice]

That’s a 5 minute Job you just need to replace the existing wireless box with the heat link. Live/Neutral and call for heating which is proably the grey in your case. You need to link the live in the heat link post a pic of the heat link and I will explain.

 

[lost in london]

That’s a 5 minute Job you just need to replace the existing wireless box with the heat link. Live/Neutral and call for heating which is proably the grey in your case. You need to link the live in the heat link post a pic of the heat link and I will explain.

Exactly what I hoped. I found a wiring diagram for my current wireless box, blue neutral, brown live, black is common, grey is normally open/call for heat, just need to connect those to the relevant bits of the heat link, the heat link instructions confirm where they need to go. No need to touch the junction box.

 

[Justice]

Exactly what I hoped. I found a wiring diagram for my current wireless box, blue neutral, brown live, black is common, grey is normally open/call for heat, just need to connect those to the relevant bits of the heat link, the heat link instructions confirm where they need to go. No need to touch the junction box.

That’s it bud If the blacks common no need for a live link

 

[lost in london]

That’s it bud If the blacks common no need for a live link

Great, thank you.