changing heating programmer?

I have no skills or experience - an unqualified muppet...

From this pdf... Page two...

http://www.heatweb.com/pdf/Invensys/Programmer%20Compatibility%20Chary.pdf

Drayton Lifestyle LP112 terminals

Neutral
Live
1) H/W Off
2) C/H Off
3) H/W On
4) C/H On

In this diagram...

http://www.gasheating.co.uk/Mid-Position-Valve.html

H/W off goes to the cyclinder stat and from there to the Mid Position Valve on the Grey wire

Good luck...

Peccavi
February 2010