From the feeling patrols would be irresponsible in another building because the mentally and physically disabled residents of the dormitory require special assistance, in particular just the epileptic.
Without a written Instructions you should not pursue the request of the employer.
What is an "ND"?
If your employer assigning you another task, it must have a negative ground. It may even have a positive reason.
That you can not judge that. What tasks you have in ND?