Caching using AppFabric for custom application on SharePoint 2013

I decided to use Distributed Cache of SharePoint 2013 on a separate dedicated Appfabric Cluster as recommended by MS for my custom application. I will have one application server running only Distributed Cache Service for this. I have below questions:

1. Is it required to install SharePoint on that Server?


2. How do I ensure that cache from this cluster is distributed across other servers of SharePoint?


3. How do I design my application to check for the cache in the separate cluster instead of default Distributed cache of the SharePoint?