siemens rwb9 connections to boiler?

Mains power goes from the fused spur to a junction box or wiring centre (center)

From there to the programmer - room stat and cylinder stat - the diverter valve and the boiler.

The boiler electronics feed the circulating pump and allow for pump over-run.

All of this depends on the specifics of the boiler and its associated components.

Do not attempt this at home.

Stay safe...
September 2016

It is called the installation manuals for whatever make of boiler, ptogrammer etc you have. You also need to understand what you are doing and be competent. You clearly fail on the last two and the fact that you have had to ask here instead of looking for themanuals suggests you don't have a hope in hell of doing the job safely.

Get someone competent to do the job
September 2016