I am planning on install a new heating timer, but Iím a bit puzzled on how to wire it up.
Iíve taken the old timer of the wall.
There are 2 cables each with 1 Blue, 1 Brown and 1 Green & Yellow wire. But there is also another Green & Yellow wire sticking out (it has red insulating wrap around it)??

Could anyone explain how to wire the timer. The diagram can be found at

http://www.invensyscontrolseurope.co...%20page%20.pdf

Thanks.....