Betacom 28A - Nest

[scotty1234]

Hi guy's ... yes another newbie with A nest question
Searched this but cant find the answer... Installed Nest to my Glow worn betacom 28A and it's all set up but the problem is I think the timer on the boiler, it's not handing over controls to the Nest
Anyone had this issue before?
Edit to say the image attached - the 2x grey wires are going to 2/3

 

[CBW]

Set timer to constant and see if that helps

 

[scotty1234]

Set timer to constant and see if that helps

No difference Chris, boiler is still working from it's controlls

 

[picasso]

Removed the 24v link ? you should leave the timer on constant and opening/closing the 24v connection should turn the boiler on and off.

 

[CBW]

Have you removed any old wiring? Are you sure you haven’t crossed the black and grey wiring? Have you checked what status the nest is at? Is it connected via wi-fi?

 

[ianmcd]

The wires you have connected to terminals 1&2 on the heatlink have to be connected between 2&3, 1 is not used on your set up as you have a combi, Also as you are powering the thermostat using T1 &T2 your will have to connect an earth wire to the heat link

 

[CBW]

The wires you have connected to terminals 1&2 on the heatlink have to be connected between 2&3, 1 is not used on your set up as you have a combi

Yes, should have picked up on this, thank you Ian.

 

[scotty1234]

Removed the 24v link ? you should leave the timer on constant and opening/closing the 24v connection should turn the boiler on and off.

Only link I can see is in the BUS (ORANGE TAB)

Have you removed any old wiring? Are you sure you haven’t crossed the black and grey wiring? Have you checked what status the nest is at? Is it connected via wi-fi?

Not removed anything, all setup on the stat, wifi connected etc..

The wires you have connected to terminals 1&2 on the heatlink have to be connected between 2&3, 1 is not used on your set up as you have a combi, Also as you are powering the thermostat using T1 &T2 your will have to connect an earth wire to the heat link

I did edit the 1st post, the image shows 1/2 but it is connected to 2/3... I don't have an earth on the heat link! I'll take one from the JB and add that now...

 

[ianmcd]

post a pic showing the boiler timer as it is now, not as it was last year

 

[CBW]

boiler is still working from it's controlls

Which controls?

 

[scotty1234]

post a pic showing the boiler timer as it is now, not as it was last year

Attached mate..

Which controls?

The boiler timer, not sure if it should? I thought the Nest would take over the timer control,
Add an earth but no difference...

 

[picasso]

Put the timer on constant and turn off the heating on the nest , does the boiler stop ?

 

[scotty1234]

Put the timer on constant and turn off the heating on the nest , does the boiler stop ?

No mate, still on

 

[picasso]

post a pic of the timer and the front of the nest.

 

[ianmcd]

Your timer is set on timed not constant, you need to click the little switch to I with the little switch, have you removed the 24V link on the PCB ?