Hitachi screw control

[afak]

Hi to every one
We are going to install Hitachi screw compressor model
5001SC-H and need any helpful electrical catalogu or informations help in building electrical system that control its capacity control steply and infinitly in relation with temperature variations.We have no catalogue nor find in the internet or Hitachi website.
I will be so thankfull for help.

[GHAZ]

Hi minium capacity for starting is solonoid valve 1 energised and others deenergised, 50% v1 and v2 deenergised and v3 energised, 75% v1 and v3 deenergised and v2 energised, 100% all 3 valves deenergised,and for infinite you need the scz compressor because it has different internal setup

[afak]

Thank you very much GHAS !
Sorry for bieng late to reply due to some problem in the internet last ten days.I have the catalogue of the scz but not the sch one.
Thank you very much again.