i know post is old but as vokera was fairly standard fit in ireland in the 10 years i think it might help to reply anyways
id imagine your system isnt mains fed but attic fed
pressure will only be 0.5 bar
also i guess no filling loop is fitted
post a picture of pipework in hotpress
is their a red gate valve connected to attic tank below it a non returing valve and above it an air pressure valve
if yes the gatevalve is how you top up system just turn it a little to relese some water and then tigthen once boiler fired up the pressure gauge on vokera will hover around 1.5 bar
other problems if this fails are ignition swith which is fairly flakey
if all else fails ring vokera.ie in kilkenny and get their repair guy out, they charge 189 but this covers everything i.e labour plus any parts
just got me a new heat exchanger and pcb board and ignition switch this way
[/quote]The trouble here is I can't find a valve to the system that I can open to allow more water into the system or I can't find a fill point to top up system so as to ignite boiler.Is there another option to fill system. I did have an engineer out before to restart my boiler. He played with something in the boiler and it started up straight away.