I called Baxi-Valor on 08448711565 button 1, quoted the Model and type number and the layout was sent to me in a trice I did not call Valor 1st off because of the regulations but these instructions are for the user to keep so are freely available as it does not interfere with the gas system.I expect a gas fitter will have somthing to say about that.
Walke40
May 2010