He is expected to link up with his Old Trafford team-mates after the African Cup of Nations, providing he secures a work permit.
"I have been a fan of Manchester United from when I was very young, so now I will work very hard to get into the first team," Manucho told MUTV.
"I am very happy to be here and I have worked very hard to make my dream a reality.
"I have found the adaptation easy because all the players have given me their support... and players like Cristiano Ronaldo, Nani and Anderson all speak my language."
