turn off rad valves,drain rad,when rad refitted,make sure u no where filling loop is to repressure system after venting rad as pressure in system will drop as system will more likely be sealed
Impressive heating., July 2007
same as any other system.
shut the radiator valve's each end, slacken one end of the rad and drain into a bowl, when radiator drained undo both ends and remove rad.
sonray heating, July 2007
edit
I can answer this question...
how do you take a radiator off the wall with a combi/ pressurised system?