Replace current thermostat for nest 3rd generation. Wiring question

[Ifraz Alam]

How would I connect the current wiring to a nest 3rd gen heat link?

thanks for your help!

 

[ericmark]

To make it work, brown to L with a link to 2, green/yellow to 3, blue to N. Also if powering from heat link from T1 and T2 to thermostat.

However this may work, but it is not correct.
Green/yellow should not be used for line wires,
Also there may well be a wiring centre which it should be wired from to be able to control domestic hot water.

 

[Ifraz Alam]

To make it work, brown to L with a link to 2, green/yellow to 3, blue to N. Also if powering from heat link from T1 and T2 to thermostat.

However this may work, but it is not correct.
Green/yellow should not be used for line wires,
Also there may well be a wiring centre which it should be wired from to be able to control domestic hot water.

Thanks for your reply and help. Much appreciated. Can you please elaborate on why the green yellow wire shouldn’t be used as line wire?

 

[Deleted member 267285]

green yellow wire shouldn’t be used as line wire?

Usually used as earth wire, so someone who didn’t have a bit of a clue could harm themselves.

 

[fezster]

Thanks for your reply and help. Much appreciated. Can you please elaborate on why the green yellow wire shouldn’t be used as line wire?

Put a brown/black sleeve over it to identify it correctly.

 

[ianmcd]

very common to be wired like that, no it is not correct but very very common, I am guessing you have a combi boiler ?

 

[Ifraz Alam]

very common to be wired like that, no it is not correct but very very common, I am guessing you have a combi boiler ?

Yes

 

[ianmcd]

Also there may well be a wiring centre which it should be wired from to be able to control domestic hot water.

Thought you did so ignore what @ericmark says here , it does not apply to your setup

 

[Ifraz Alam]

Thought you did so ignore what @ericmark says here , it does not apply to your setup

Thanks

 

[Ifraz Alam]

I have installed heat link and is able to switch on heating manually by pressing the button on the heat link but I cannot get it to connect to the thermostat. I have tried many times trying to reset heat link. No joy. The thermostat was literally next to the heat link but fails to connect anyone have any ideas?

 

[fezster]

Try resetting the heat link by holding down the button for 20 seconds. Google to see what lights should show.

On the nest thermostat you can also re-pair the heat link. Check here for instructions: https://support.google.com/googlenest/answer/9251846?hl=en-GB

 

[Ifraz Alam]

Try resetting the heat link by holding down the button for 20 seconds. Google to see what lights should show.

On the nest thermostat you can also re-pair the heat link. Check here for instructions: https://support.google.com/googlenest/answer/9251846?hl=en-GB

I have tried all that. Nextep was to phone customer service but as they are closed today I thought I would try on here. But thanks for the reply

 

[ericmark]

I The thermostat was literally next to the heat link but fails to connect

So why not hard wire it?

 

[Ifraz Alam]

So why not hard wire it?

I needed wireless I only brought it next to the heat link to try and connect but would normally be further away.