Nest wiring help

[chrisc90]

Hi all

Got a nest to wire up in the next week or so.   Replacing a old siemens controller with wiring pictured below.

https://ibb.co/2hQfjPP
https://ibb.co/SPS2PZQ

Now I guess the black wire,  thats currently in L1 on the Siemens, will connect to number 3 on the nest controller,  whilst the grey wire in LX will go to number 2 on the nest controller.

Live and Neutral in the top 2 connections will be pretty simple going to each matched label on the nest controller

Thanks

[ByronP]

Hi chrisc90,

Thank you for reaching out to the community. I understand that you need help wiring your newly purchased Nest thermostat. Let’s work together to find a solution.

To address your concern, I highly recommend checking your current thermostat’s wires to determine if your system is compatible. Here is a good article to review the compatibility checker for your current system.

Next, contact a local HVAC system professional. A trained technician can quickly diagnose your system, identify the wires, and install your Nest thermostat.

Please let me know if you have any further questions.

Regards,

Byron