DIY Doctor

Nest and Heatlink Wiring Help Please

Postby Nobber » Tue Nov 03, 2020 8:35 am

Hello
I have a secure 302 channel wireless receiver connected to my boiler it just fitted over the standard backplate when I removed the old programmer some years ago, it is paired with a wireless thermostat, I think I linked two connections together in the central heating wiring centre when I replaced the old wired thermostat but can't remember which ones, so everything work ok at the moment but I want to replace the thermostat and receiver with a Nest to control Heating And HW

This is from the receiver manual -
302.png
Secure 302 wiring
302.png (18.46 KiB) Viewed 87 times


This is what I have when I remove the old receiver above

old wiring.JPG
old wiring


So if I move the L N Wires to the correct L N on the heatlink and link L to 2 and 5

No 4 above is Heating and No3 HW

So yellow no3 above goes to no6 and blue no4 goes to no3 is this correct?
nest.jpg
nest
nest.jpg (33.29 KiB) Viewed 87 times


I want the Nest to connect via Wireless to the heatlink is there anything I am missing here


Thank you for reading and any advice
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Postby ericmark » Sun Nov 15, 2020 10:33 am

Your diagram is correct, however I think you will find the terminals in the nest thermostat are too small to wire direct. [attachment=0]upper_wiring_centre_plus_heatlink.jpg[/attachment] when I did it I put a wiring centre next to Nest so I had some where to sort out wires.
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Postby Nobber » Sun Nov 15, 2020 5:29 pm

thanks
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