Hi just bought a nest e thermostat . Ive included a picture of the wiring for the old thermostat and the connections for the new nest thermostat. I just want to make sure it’s compatible before I get someone to install it. Which wire goes to which connector for want of a better question ?
![[ElectriciansForums.net] Nest e thermostat wiring question](https://www.electriciansforums.net/attachments/ab705a6b-6730-4222-bd70-1a4e80a77b2a-jpeg.52042/ "[ElectriciansForums.net] Nest e thermostat wiring question")
![[ElectriciansForums.net] Nest e thermostat wiring question](https://www.electriciansforums.net/attachments/3aa56283-af5f-40ba-a776-7dbf5c57efbd-jpeg.52043/ "[ElectriciansForums.net] Nest e thermostat wiring question")
![[ElectriciansForums.net] Nest e thermostat wiring question](https://www.electriciansforums.net/attachments/f36f5f7d-e355-4d82-b45b-682297e41ed9-jpeg.52044/ "[ElectriciansForums.net] Nest e thermostat wiring question")
- Thread starter Mattressback
- Start date
- Replies 29
- Views 8K
Discuss Nest e thermostat wiring question in the UK Electrical Forum area at ElectriciansForums.net
seems you need a N which you've not got in the existing stat.
I would agree with Tele ,and would agree with your self .
Does seem unusual not to have a neutral at an old existing room stat. Someone moved the existing stat in the past?
possible that is a two wire system .
you need a 3core/E cable instead of the T/E.
The nest thermostat is a combination of time clock and thermostat.
The base “receiver” unit can be fitted next to the boiler where there will be all the cables that you require.
The control or thermostat unit would normally be placed wherever the old thermostat is mounted and only needs 2 cores. This is to supply power from the base unit to the stat unit, as per the instructions.
All the control signals are sent wirelessly from the stat to the base unit.
Although this could be done by someone good diy skills and electrical knowledge, I would recommend getting a professional in to do it.
A mistake in the wiring could do any of the following.
1. Write off the boiler control board
2. Write off the nest thermostat
3. Cause a shock or other injury
4. All of the above at the same time.
As long as you have a wire with at least 2 cores going from the boiler to the old stat, a professional should have you up and running within the hour.
P.s. for the techs reading this, the only function of the link wire from base unit to stat is to supply 12v dc to the stat for its own power.
The base “receiver” unit can be fitted next to the boiler where there will be all the cables that you require.
The control or thermostat unit would normally be placed wherever the old thermostat is mounted and only needs 2 cores. This is to supply power from the base unit to the stat unit, as per the instructions.
All the control signals are sent wirelessly from the stat to the base unit.
Although this could be done by someone good diy skills and electrical knowledge, I would recommend getting a professional in to do it.
A mistake in the wiring could do any of the following.
1. Write off the boiler control board
2. Write off the nest thermostat
3. Cause a shock or other injury
4. All of the above at the same time.
As long as you have a wire with at least 2 cores going from the boiler to the old stat, a professional should have you up and running within the hour.
P.s. for the techs reading this, the only function of the link wire from base unit to stat is to supply 12v dc to the stat for its own power.
OP
Hi again, can I just clarify that this is a nest thermostat E that uses the heat link at the thermostat with nothing fitted to the combi boiler itself (obviously the thermostat connects to the boiler at that point). I’ve just spoken to nest tech support and told her that I only have a 2 wire system and she seemed very confident that they will connect to the C and NO and that the system will work.
N is indeed neutral.
[automerge]1568132889[/automerge]
so, if i read your right. ( bear in mind i have no knowlege of nest), he needs a 3core/E (or 4 core flex) from boiler to receiver, and just a pair to the actual stat., which mus be RF to the base unit?
op I would ask the people at nest to sort you out .
with your existing stat, brown is L, blue is switched L. Gn/Y is earth.there is no neutral.
Nest e is far simpler than the original nest unit.
Download the app, the app will guide you through installation.
All the info is here, watch the video, pause it when you need to do something, then continue.
If you are unsure, get a professional in to assist.
Download the app, the app will guide you through installation.
All the info is here, watch the video, pause it when you need to do something, then continue.
If you are unsure, get a professional in to assist.
Reply to Nest e thermostat wiring question in the UK Electrical Forum area at ElectriciansForums.net
Similar threads
I think it was too early yes I meant 3 not 2, but great I'll give that a whirl and thanks.
- steve1906
- Central Heating Systems
- 8
- 359
- Question
It's the policy on this forum not to give step by step advice.
If you have an understanding of wiring requirements you will not have any...
OFFICIAL SPONSORS
These Official Forum Sponsors May Provide Discounts to Regular Forum Members - If you would like to sponsor us then CLICK HERE and post a thread with who you are, and we'll send you some stats etc
YOUR Unread Posts
-
Air pump for campingYou may have read elsewhere that I managed to break the hand pump for my inflatable awning for...- Latest: littlespark
-
The Official Sponsors of ElectriciansForums - There are currently 8OFFICIAL SPONSORS These Official Forum Sponsors May Provide Discounts to Regular Forum...- Latest: Dan
-
This website was designed, optimised and is hosted by untold.media Operating under the name Untold Media since 2001.