Do we need a local collect setup if we don´t use reporting etc? We did setup a mail schedule for the manager.

No, in that specific case you can save the time for that. However, remember that there must be an active collect job in the client configuration. This active job is made automatically during the first setup of your KYOcount client, don´t delete that job. Also remember the collection of data just before e-mailing will create a local database from which you can do reporting and exporting in the client. You cannot stop that.