Wiring a relay to protect a programmer help.

[mattylad]

Thanks for this.

I believe a 3a fused spur supplies the wiring centre and then goes from the wiring centre to the tado receiver.

Before you fitted the Tado, what supplied the pump? turned it on etc?

 

[CountryFan]

Before you fitted the Tado, what supplied the pump? turned it on etc?

Can I ask why? It was just replaced with an old potterton ep p2000 programmer or something like that.

 

[mattylad]

If you put it in the airing cupboard then all the wiring from the previous programmer back to whatever supplies that will need isolating at the other/both end to make safe.

 

[Lee Edwards]

If you put it in the airing cupboard then all the wiring from the previous programmer back to whatever supplies that will need isolating at the other/both end to make safe.

To be honest, I don't think I will move it. It should be ok where it is as long as I can use a relay next to the wiring centre.

 

[mattylad]

That's OK as long as the permanent live to the relay "com" and the neutral to the pump comes from within the wiring center/airing cupboard.

Else you may be crossing from one circuit in the consumer unit to another and this may affect the RCD/RCBO etc. (depending on what your CU has).

 

[Lee Edwards]

That's OK as long as the permanent live to the relay "com" and the neutral to the pump comes from within the wiring center/airing cupboard.

Else you may be crossing from one circuit in the consumer unit to another and this may affect the RCD/RCBO etc. (depending on what your CU has).

There is only one supply to the heating wiring. Naughty if you use 2 as you could isolate the supply thinking it is dead and then get a shock because it has another supply.

 

[mattylad]

That's what I am saying, do not do it.
This is why IMO the tado would be better in the airing cupboard where it all can use the same supply.

Test it to see if it still works the same there. you do not need to connect anything to it just mains.
enable it then see if it has changed the output state or can you hear a click.

 

[Lee Edwards]

That's what I am saying, do not do it.
This is why IMO the tado would be better in the airing cupboard where it all can use the same supply.

Test it to see if it still works the same there. you do not need to connect anything to it just mains.
enable it then see if it has changed the output state or can you hear a click.

Morning Mattylad. You are up early.

I am not sure what you mean, do not do it?

I do know for a fact that the whole heating wiring is from a single fused spur. Once that is turned off, then the whole system is dead.

I hope that makes sense.

 

[Mister Banks]

I thought the Tado sent a switched live to a motorised valve which then opens and sends a switched live to the boiler and pump. If so how will the relay help?

 

[CountryFan]

I thought the Tado sent a switched live to a motorised valve which then opens and sends a switched live to the boiler and pump. If so how will the relay help?

This is what I asked

 

[Lee Edwards]

So, I have been looking at this and think I believe what I need to do is detailed below. Have I got this correct. Thanks.

 

[Lee Edwards]

This is what I asked

Confusing isn't it.

 

[Harry Bloomfield]

I think he means it becomes enlarged but is not clear enough to read the terminal markings.

No, on my screen, most of the top/bottom/sides of the diagram, are chopped off.

 

[Lee Edwards]

No, on my screen, most of the top/bottom/sides of the diagram, are chopped off.

Oh really. I can see it all on mine. Do you know how I can fix this?