i have a vokera syntesie 29E pressure is just under 1 bar.i want to bleed a radiator. But with the filling loop in place and open the pressure does not rise.I have mains pressure at the outlet of the filling loop.the system is working fine but if i bleed the rad i might not regain pressure

Bill, October 2010

have you tried opening both valves on loop

deano, October 2010