Refer to para 5.3.1 of Hand Book Of Procedures vol-(1) 2009-2014
"can be install the capital goods at factory / premises of authorisation Holder or his supporting Manufacturer (s) Vendors Within 6 month from the date of completion of import"
in this regards,inform central excise officer(suptdt)[if u are registered in c.excise) otherwise before installation machine called a Independent Chartered engineer,whom will issue certificate about the installation as per provision laid down in the F.T.P. 2009-2014.