Nest 3rd Generation swap in for Salus RT500RF advice

3 Jan 2019
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Bournemouth, UK
United Kingdom
Hi all,

Looking to swap out my existing Salus RT500RF with Nest 3rd Generation. Combi boiler so only heating to worry about. Nest thermostat will be talking to HeatLink wirelessly only.

Looking at the current wiring [see attached] I think it’s just a straight swap, but just wanted some reassurance (and to save the ££)

For me it’s simply:

Green/Yellow to Nest 3
Black to Nest 2
Brown to Nest L
Grey to Nest N

Thanks in advance


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Looks good to me. I would put some brown sleeve over the green/ yellow wire to show that it's being used as a live. Doubt you will notice any money saving though, unless you plan to run the heating at a lower temperature than now. I've yet to find anyone who has installed a smart thermostat reporting that they have noticed tangible cost savings.
Ah yeah I actually just meant the cost saving not getting a sparky in to install it :)

Anyway, thanks @stem really appreciate the reply
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Ah OK :whistle:. That makes more sense, especially as yours is a straightforward swap.

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