Logic Combi ESP1 35 always showing demand for Central heating

[John.g]

Terminal (from left) 3 Shaun if terminal 4 is live with link removed?? (post 15).

 

[Deleted member 120897]

It’s as easy as removing the red link and installing the black wire in where the right hand terminal where the red link one eg closest to the live terminal

EditEd, I see it now

 

[theboyroberts]

Just like the attached ShaunCorbs?

 

[theboyroberts]

John.G - not sure if you've noticed, but there's blue sleeves on the grey wires.

 

[Deleted member 120897]

John.G - not sure if you've noticed, but there's blue sleeves on the grey wires.

That just denotes the grey wires are being used as neutral wires.
My bad, just noticed the grey from your zone valves are connected to lives, the neutrals are connected to grey sleeved wires acting as neutrals. So yes, just connect up as Shaun has said, just the black wire to the terminal closest to the incoming live - NO LINKS!

 

[Deleted member 123817]

If the link is just removed and the stats are still switching the supply then thiseans that they are fed from elsewhere and the black wire should be inserted in terminal 3, period.??

 

[Deleted member 123817]

What number terminal is this please, from the left.

 

[theboyroberts]

I believe i understand this now

The black wire which enters to the bottom of the Room STAT/Timer block link is carrying power which is carried over through the link into the red wire leaving the bottom and activates the demand for central heating. Hence the boiler firing constantly.

By removing the link and placing the black wire in the 4th position (counting from the earth as number 1) as soon as the thermostats activate, power travels down the black wire and the demand for central heating fires the boiler.

Is my understanding correct?

 

[Basher]

What number terminal is this please, from the left.

I agree with your post #36
From the technical sheet, diagram C, the boiler requires switched mains on terminal 3 from the left - ie the left hand connection of the red link, which will be removed.
So the black wire goes there, and nothing goes in the next one, according to diagram C.

 

[Basher]

I believe i understand this now

The black wire which enters to the bottom of the Room STAT/Timer block link is carrying power which is carried over through the link into the red wire leaving the bottom and activates the demand for central heating. Hence the boiler firing constantly.

By removing the link and placing the black wire in the 4th position (counting from the earth as number 1) as soon as the thermostats activate, power travels down the black wire and the demand for central heating fires the boiler.

Is my understanding correct?

No that is not consistent with what Diagram C shows. Surely the power needs to be fed into the next terminal along - the 5th position as you are counting?