We have the 9009 model here. No manual sadly, the only person we knew that knew anything about the workings was a vender rep frame Framer's Market in CT. But I hear he no longer works there.
I keep it set at around 70psi and this works for most frames. Although some of the hardwoods are temperamental and for those we use a rubber mallet to complete the action on the top pinning mechanism when it seizes.