How to do tube biasing for my Jadis Orch. Ref Amp?

I own a Jadis Orchestra Ref integrated amp using KT99 tubes. According to their adverts the amp can run EL34, 6550, KT88 & KT99. I've decided to try out some of these tubes, but unfortunately the owner's manual is no help in this area, neither did I get any help from Jadis. My system include the SonusFaber Concerto speakers, Wadia 6 CD & XLO cables. So, I am really looking for help and if some of you out there can teach me what to do and voltages to set for the different tubes, I would be most thankful.