APEX'i has the manuals for the VAFC and VAFC II on their website. Make sure you have Adobe Acrobat on your computer to read the .pdf files.
VAFC:
http://www.apexi-usa.com/productdocu...onics_vafc.pdf
VAFC II:
http://www.apexi-usa.com/productdocu...ics_vafcII.pdf