Powermax 155x Combi Boiler?

I too am looking for user instructions for the Powermax 155x combi boiler. I moved into the property a little while ago and now with the cold weather coming on, I want to get the heating times right. I have played around with the times but am not 100% sure I have got it. I have looked at several websites but the only place I can find instructions is on Potterton website and they they want to charge me about £34! Help