Hi all, have just rebuilt, recommissioned and started up the vented central heating and hot water system in the loft, due to having to relocate tanks and cylinder for a loft conversion. I now have hot water but no c heating... The zone valve doesn't seem to move much, my question is, how far- in degrees- should the 'mechanical' bit of the valve move? I'm only getting about 10-15 deg, is this enough? PLEASE don't tell me I have to drain the system... AGAIN!!! thanks, Tim.
