Connecting nest thermostat to worcester Greenstar Compact RI

[Pedrostar88]

Hi, is the below pictures the right setup for my nest heat link to my Worcester greenstar boiler compact?

 

[ShaunCorbs]

Yes

 

[Pedrostar88]

Yes

Hi thanks for the reply, I got it all connected and got the heat link powered up and connected wirelessly to the nest thermostat. When I turn the heating off and on I can hear the heat link click and fire the blue light on and off on the boiler but the radiators dont seem to be coming on?
Am I needing a wire running from the relay circuit from terminal 2 in the heat link to constant live on the boiler to allow the thermostat to turn the radiators off and on depending on the set temperature?
Thanks.

 

[ShaunCorbs]

on board clock / how did you control it before?

 

[Pedrostar88]

on board clock / how did you control it before?

I’ve just moved in to a new property, there is an existing programmer which I removed to connect the nest in to those terminals.
I’ve put the existing programmer back on and heating works fine but want to control it with my phone so would prefer the nest.
I’ve attached picture showing wiring for existing programmer.

 

[ChrisB1982]

Live return (switch live) is grey and in your heatlink looks black, does this join somewhere? Did you have an existing thermostat?

 

[ShaunCorbs]

There will be an anti cycle time of around 15mins when you turn the heating off and on rapidly

 

[Pedrostar88]

Live return (switch live) is grey and in your heatlink looks black, does this join somewhere? Did you have an existing thermostat?

Yeah I have an existing thermostat in the hallway which is behind the wall from where the programmer is. I’ve attached picture of programmer and thermostat. Thanks.

 

[ChrisB1982]

Try setting this thermostat to maximum and see if the Nest kicks in and out as it should.