Nest stat installation on Worcester Greenstar R35 HE Plus boiler

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Nataraj

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Does any one ever tried to install a Nest thermostat on Worcester Greenstar R35 HE Plus boiler? As you probably are aware,  boiler manual state that only the Worcester TR2 can be used on this boiler. Appreciate any help or references that will allow me to set this up myself. Below is possibly the only sensible reference i found online but need few things clarified on this -  https://www.diynot.com/diy/threads/worcester-bosch-greenstar-r35-thermostat-wiring.453601/

 
Link doesn’t work?
You mean link between N and Ns? well i have not installed the stat yet but would want to get this clear before i start. When i install a Hive/ Nest does the boiler need to be set to 'Constant On'? If yes, would not the 'Constant On' reset over night be an issue? 

 
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