I have recently had a new worcester boiler installed together with a Worcester DT10 RF Digistat. The stat has preset programs for temps and times these temps take place. All of them start at 6.30am for morning heating. I cannot seem to find any settings that allow me to adjust the times of when the heating is on or off. Can anyone tell me if this is possible as I get up at 6am every morning and would prefer the heating on 15 mins before I am up so I dont freeze in the winter!