D D DIYnotBot 15 May 2012 This image is referenced in the forum thread 'Y-Plan - Fault Finding Cheat Sheet'
D D DIYnotBot 23 Sep 2012 This image is referenced in the forum thread 'Y-Plan - 3 Port Valve - cannot have CH on by itself?'
D D DIYnotBot 27 Sep 2012 This image is referenced in the forum thread 'Boiler and pump randomly firing up!'
D D DIYnotBot 16 Dec 2012 This image is referenced in the forum thread '12i/24i system boiler wiring'
D D DIYnotBot 16 Jan 2015 This image is referenced in the forum thread 'is my 3 port motorised valve faulty'
