On Thursday, 19 April 2018 21:19:41 UTC+1, Tim Lamb wrote:
Well the boiler got installed and eventually the electrician returned to
wire up the system.
Without much thought or any advice, I had opted for W plan. The circuit
diagram looked simple enough:-(

Well it is only 6 connections and earth. Even a plumber should be able to join that up.

http://wiki.diyfaq.org.uk/index.php?...iority:_W-Plan

Owain