Before I commit myself to anything, any comments (good, bad or
otherwise) would be appreciated on the following proposed circuit;

http://i1234.photobucket.com/albums/...tingWiring.png

At the minute, the boiler is connected to the SFCU and that's it, so
everything else will be new.

- The FCU supplies L,N&E to the boiler and N&E to the wiring centre
- The boiler supplies L to the wiring centre
- The boiler takes S/L from the wiring centre

If the boiler is not switched on, the wiring centre and all associated
controls get no power. If the FCU is not switched on, nothing does.

Should I also be taking N from the boiler to the wiring centre, though,
rather than going direct?

http://www.worcester-bosch.co.uk/cac...after-1997.pdf


--
Cheers, Pete

Peter B wrote:
Before I commit myself to anything, any comments (good, bad or
otherwise) would be appreciated on the following proposed circuit;

http://i1234.photobucket.com/albums/...tingWiring.png

At the minute, the boiler is connected to the SFCU and that's it, so
everything else will be new.

- The FCU supplies L,N&E to the boiler and N&E to the wiring centre
- The boiler supplies L to the wiring centre
- The boiler takes S/L from the wiring centre

If the boiler is not switched on, the wiring centre and all associated
controls get no power. If the FCU is not switched on, nothing does.

Should I also be taking N from the boiler to the wiring centre, though,
rather than going direct?

http://www.worcester-bosch.co.uk/cac...after-1997.pdf




IMHO, you should remove and discard the existing flex from the SFCU to
the boiler.

You should be taking a new 3-core flex (L,N,E) from the SFCU to the
wiring centre and a new four core flex (L,SL,N,E) from the wiring centre
to the boiler.

Apart from that, your wiring diagram seems to be consistent with the
Sundial general schema.

The only thing slightly confusing thing is that you've shown the
Heatmiser receiver with NO/NC contacts, but the contacts are in the
energised position and they should be shown in the un-energised position.

HTH

On 16/11/2010 14:55, Dave Osborne wrote:

Peter B wrote:
Before I commit myself to anything, any comments (good, bad or
otherwise) would be appreciated on the following proposed circuit;

http://i1234.photobucket.com/albums/...tingWiring.png

IMHO, you should remove and discard the existing flex from the SFCU to
the boiler.

You should be taking a new 3-core flex (L,N,E) from the SFCU to the
wiring centre and a new four core flex (L,SL,N,E) from the wiring centre
to the boiler.

Ah, right - makes more sense.

I guess I was thrown off track by the diagrams in the wiki all showing
the boiler only getting live from connector 10 in the wiring centre.

Apart from that, your wiring diagram seems to be consistent with the
Sundial general schema.

Based upon your fine work, thanks - then butchered by me in Visio, so I
can attach a copy to the back of the cupboard door wherein all the
controls will live.

The only thing slightly confusing thing is that you've shown the
Heatmiser receiver with NO/NC contacts, but the contacts are in the
energised position and they should be shown in the un-energised position.

I could try bluffing it and tell you that in the diagram the stats are
calling for heat

--
Cheers, Pete

"Peter B" wrote in message
...
On 16/11/2010 14:55, Dave Osborne wrote:

Peter B wrote:
Before I commit myself to anything, any comments (good, bad or
otherwise) would be appreciated on the following proposed circuit;

http://i1234.photobucket.com/albums/...tingWiring.png

IMHO, you should remove and discard the existing flex from the SFCU to
the boiler.

You should be taking a new 3-core flex (L,N,E) from the SFCU to the
wiring centre and a new four core flex (L,SL,N,E) from the wiring centre
to the boiler.

I would normally use T&E from the fused spur to the wiring centre. I only
use flex for connections to the boiler, pump etc

Ah, right - makes more sense.

I guess I was thrown off track by the diagrams in the wiki all showing the
boiler only getting live from connector 10 in the wiring centre.

The diagrams are only a guide. But as you spotted the boiler quite often
needs a permanent live as well as the switched live.

Apart from that, your wiring diagram seems to be consistent with the
Sundial general schema.

Based upon your fine work, thanks - then butchered by me in Visio, so I
can attach a copy to the back of the cupboard door wherein all the
controls will live.

The only thing slightly confusing thing is that you've shown the
Heatmiser receiver with NO/NC contacts, but the contacts are in the
energised position and they should be shown in the un-energised position.

I could try bluffing it and tell you that in the diagram the stats are
calling for heat

I believe you.

--
Adam