The 11 rooms at Daffodil House were all occupied at the time of the burglary and the raid woke several patients.
''It could have been potentially catastrophic if someone went down to see what was going on,'' he said.
Fortunately, none of the patients went downstairs to investigate. Campus Watch staff discovered the broken door, he said.
''They are going through a tough time as it is without having to deal with someone breaking into the building,'' Mr Kernaghan said.
''It's really disappointing.''
The raid was ''pretty pointless'' as cash and drugs were not held on the premises.
The burglar made off with some loose change - ''a couple of bucks'' - which was in a drawer in the reception area, but nothing else was taken.
The intruder could not access any other part of the building because of its security, Mr Kernaghan said.
''There was a bit of blood left behind. They cut themselves during the process,'' he said.
The patients, while a little shaken, were fine but ''a little annoyed''.
Police confirmed they were investigating the matter and had taken evidence from the building yesterday.