Just moved to a new property and braved myself to get a nest 3rd gen thermostat. Previously I did setup tado with an extension unit to control HW on my previous property with the assistance of tado support team so i thought to change over to nest. However i realised their support is not the same as i experienced in the past with tado so I am a bit stuck.
My current property has a boiler glow worm 15r energy installed with drayton LP522 programmer next to the boiler and a honeywell wired thermostat in a different location. The plan is to replace the LP522 with nest heatlink and the honeywell with the nest unit.
Existing wiring diagram of the LP522:
Existing wiring of the honeywell:
From my understanding by reading various similar discussions I may have to "rewire" or modify the connections of the wired central unit where the tank resides. I hope that this is not the case and i will be able to accomplish my plan without this. Is this possible?
Here is the wiring of the wired central unit next to the tank in the airing cabinet:
Could you please advice the wiring arrangements required for the LP522-> Heatlink & Honeywell -> nest display?
Many thanks in advance
My current property has a boiler glow worm 15r energy installed with drayton LP522 programmer next to the boiler and a honeywell wired thermostat in a different location. The plan is to replace the LP522 with nest heatlink and the honeywell with the nest unit.
Existing wiring diagram of the LP522:
![IMG_0137.JPG IMG_0137.JPG](https://cdn.diynot.com/data/attachments/160/160418-3c1e1758428800658831304de59cc130.jpg)
Existing wiring of the honeywell:
![IMG_0138.JPG IMG_0138.JPG](https://cdn.diynot.com/data/attachments/160/160417-2c0b1cccb0190f465b4ffaa8a86b3766.jpg)
From my understanding by reading various similar discussions I may have to "rewire" or modify the connections of the wired central unit where the tank resides. I hope that this is not the case and i will be able to accomplish my plan without this. Is this possible?
Here is the wiring of the wired central unit next to the tank in the airing cabinet:
![IMG_0139.JPG IMG_0139.JPG](https://cdn.diynot.com/data/attachments/160/160420-3f19a6775c0bb237261639c15a636737.jpg)
![IMG_0140.JPG IMG_0140.JPG](https://cdn.diynot.com/data/attachments/160/160421-54ace2a5332e33d1ad7f90702609a6f3.jpg)
Could you please advice the wiring arrangements required for the LP522-> Heatlink & Honeywell -> nest display?
Many thanks in advance