Can i repair Vokera Excell 80SP, ?

the leak will be water getting by the overpressure valve, could be fixed by operating the valve a couple of times, but more likely it will need replacing. It happens because the valve is releasing pressure evrytime the central heating heats up. Recharge the expansion vessel first.

c
December 2010

it is probably dripping from where the operating pins push on the fulcrum arm. Take the cover off and have a look. The bushings with o rings are replaceable parts. The boiler needs a service. Pressure variations are due to the expansion vessel needing recharging. You can depressurise the boiler by twisting the red knob on the overpressure release valve.
You can download the manual from the Vokera website.

c
December 2010