Nest 3 Heat link to vaillant ecotec plus 831

[vovski]

Hi all,

Just some advise on how to connect the nest 3rd Gen heat link to my vaillant ecotec plus 831 boiler.

Would I remove the jumper/link between 3 & 4.
connect number 3 on boiler to Heatlink L and a jumper/link to 2 on Heatlink also.
connect number 4 on boiler to Heatlink 3.
connect number 5 on boiler to Heatlink N.

Is this correct, if not could you tell me the correct way via a sketch or step by step instructions

Many thanks for your help and time

 

[hertsboilers]

Remove the link between 3 and 4 on the boiler.

Boiler 3 to Heatlink 2

Boiler 4 to Heatlink 3

 

[vovski]

Hi, thanks for the reply,
would your method be sufficient for powering and controlling the Heatlink?

 

[hertsboilers]

Hi, thanks for the reply,
would your method be sufficient for powering and controlling the Heatlink?

No of course you also need L and N and even T1 and T2.

 

[vovski]

Hi,
Thanks for the reply, I have no other thermostats fitted
So to power up and controller the Heatlink,

Boiler 3 to Heatlink 2

Boiler 4 to Heatlink 3

Boiler L to Heatlink L

Boiler N to Heatlink N

 

[hertsboilers]

Hi,
Thanks for the reply, I have no other thermostats fitted
So to power up and controller the Heatlink,

Boiler 3 to Heatlink 2

Boiler 4 to Heatlink 3

Boiler L to Heatlink L

Boiler N to Heatlink N

Correct.

Do you understand what are T1 and T2 for?

 

[vovski]

hertsboilers

Thanks for the prompt reply,
the nest thermostat will be powered via the mains cable supplied.

 

[vovski]

Hi,
Just a couple of questions
What temperature do I set my boiler to for the radiators and hot water ?

 

[vovski]

Hi,
have wired all as suggested but nest does NOT switch boiler on/heat radiators.
Just to clarify this is what I have done.
Boiler 3 to Heatlink 2

Boiler 4 to Heatlink 3

Boiler L to Heatlink L

Boiler N to Heatlink N

Have also tried .....

boiler 3 to Heatlink L and 2.

boiler 4 to Heatlink 3

boiler 5 to Heatlink N

Any ideas or suggestions why nest will not turn on heating ? I have a green light on heat link, and nest says it is heating but boiler remains off !!!
Please help, thank you

 

[Johnmdc]

How did you control the heating before?
If it was with a built in clock this will need setting to permanently on.

 

[vovski]

Hi
Thanks for your reply, heating and programming was done by the inbuilt vaillant digital programmer timeswitch.
How would I set to permanently on ?