hi again..what i am exactly trying to achieve..is the following...as it it a
new central heating system to me....i thought that in this cold weather i
would have to put on both HOT WATER & CENTRAL HEATING switches to run the
central heating...but then i thought as i had a seperate switch for both
surely i would not have to switch on HOT WATER switch to run the HEATING (
therefore saving some money as to not have to have both on at once).hope you
understand what i am explaining here.but thats the gist of it...many thanks
again