This plugin is NOT a simple drop-in, it is expected you have some understanding of what an ElasticSearch server is and how it works. The goals/features of this plugin are:
Please submit bugs or contributions to the github location and not on wordpress’ system:
https://github.com/parisholley/wordpress-fantastic-elasticsearch/
API/filter/faceting documentation can be found on the wiki:
https://github.com/parisholley/wordpress-fantastic-elasticsearch/wiki