So, after looking through the net for a while I couldn't find a solution for my issue with the centrifugal fluid extractor. My current setup has it surrounded by source blocks on 3 sides as well as on top, at Y 41, with 20 blocks of water on top, and in the ocean biome (I also have a deep ocean biome, which I thought might be an issue, though none of the sides is any biome but ocean), but no matter what I do, providing minimum torque at 256 rad/s doesn't produce any heavy water whatsoever.
A picture of the centrifugal fluid extractor with F3 overlay is in the spoiler.
It's being powered by an AC engine with a 1-Clock (Redstone Comparator set to Subtract + Redstone Torch and Dust), it's running constantly, but the extractor isn't doing anything. Should the fluid pipes be on top? Should I move my setup to a deep ocean biome? I'm sorry if the solution is right there, it's escaping me. My Sea Level is Y62, by the way.
EDIT: Found a thread on FTB that said it had to be placed exactly at Y45-47 to function, moved extractor right to Y45, immediately functioned. Bug? Or intented behavior? If intended, why not fix the description in the Reactorcraft Handbook? It says Below y=45... xD. Thanks nonetheless!
I am not convinced they all were source blocks in the original location.