You can by setting the deletion parameters - something like:
MinimumFreeDiskSpace 10G
DeleteStudyOnlyIfNotAccessedFor 1d
DeleteStudyOnlyIfStorageNotCommited false
DeleteStudyOnlyIfExternalRetrievable false
DeleteStudyOnlyIfCopyOnMedia false
DeleteStudyOnlyIfCopyOnFileSystemOfFileSystemGroup NONE
DeleteStudyOnlyIfCopyArchived false
DeleteStudyOnlyIfCopyOnReadOnlyFileSystem false
ScheduleStudiesForDeletionInterval false
ScheduleStudiesForDeletionInterval 10m