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Think that's solved it, the pressure has crept up to just over one. Had a bit of an issue switching it off because I only turned it on ever so slightly, but it continued to hiss quietly unless I was holding it shut. It seems to have stopped now. Radiators feel warmer already! Thanks!!

Hi, I live in a rented house with a fairly new Vokera Compact 280 CH system. I've noticed the radiators are only becoming warm halfway up, and the pressure guage is about 0.5 bar. I think I need to raise the pressure, but having no manual I'm not sure how to do this. Can anyone point me in...