Nest 3rd gen, hot water works but radiators aren't coming on?

[DarthNaga]

So I installed the nest 3rd gen this weekend thanks to the help I got from this forum, only problem I seem to be having now is that my radiators aren't coming on, even when I turn the heating up to full? The radiators themselves are on full, but turning up the thermostat doesn't seem to make them warm up? I'm hoping someone can help point me in the right direction.


Thats the wiring centre and nest as it's currently set up, the nest has replaced the programmer.


That's how the old LP522 was wired up.

I hope someone can tell me im missing something in the heatlink

 

[cross thread]

Did you have a old room stat ? Did you bridge it out

 

[DarthNaga]

Did you have a old room stat ? Did you bridge it out

Bridge it out?
I worked out the wires and disconnected them from the wiring centre, using two of them for 12v power from the heatlink.


That was the old room stat wiring.

 

[Johnmdc]

You need to bridge terminals 2 and 3 in the wiring centre or just move the white wire in terminal 4 to terminal 3.

 

[Johnmdc]

Also you need to move the blue wire in terminal 4 in the heat link to terminal 6

 

[cross thread]

Is the white off the d/ valve connected to anything? Only on my phone so bad to see

 

[DarthNaga]

Is the white off the d/ valve connected to anything? Only on my phone so bad to see

You mean the white cable in terminal 4 in the wiring center? No.

 

[DarthNaga]

You need to bridge terminals 2 and 3 in the wiring centre or just move the white wire in terminal 4 to terminal 3.

Ahhh okay, I'll give that a go.

Also you need to move the blue wire in terminal 4 in the heat link to terminal 6

Oh really? I copied the terminals from the old programmer to the nest, I guess for Y plans it's a bit different?

 

[Johnmdc]

On the nest terminal 4 is heating off, terminal 6 is heating on.

 

[DarthNaga]

On the nest terminal 4 is heating off, terminal 6 is heating on.

Now I'm confused, as in the nest manual it says:


So 6 is call for heat for HW and 3 is call for heat for CH, and the blue and yellow cables in my wiring centre are labelled this:


So should I not be putting the yellow cable into number 6 and the blue into number 3?

I'm not questioning your knowledge btw, just have a cold wife who wants the heating back on

 

[Johnmdc]

Sorry my mistake. I've got water and heating the wrong way round.

 

[Johnmdc]

So blue should be to terminal 3
Red to terminal 4 and
Yellow to terminal 6