Thanks Brendan!
Now, to proceed any further, first I have to make new enclosure and solve CCD cooling. That will have to wait a little...
But from initial tests, camera produces very clean images with low noise free of any electrical interference.
I've put camera in freezer (-18C) and took few bias frames, resulting images show very low noise with perfect Gaussian distribution. I am extremely happy so far
If someone wants to examine bias frames, they are here (rar):
https://dl.dropboxusercontent.com/u/...5_temp-18C.rar