My very basic understanding is that it cools the beer on its way thru the unit from the legs to the tap. the system i am about to get is setup for a 3 tap font, which is being thrown in as well so i assume all i need then is 3 corny kegs, lines and away i go?
Triued searching this site and others, google, ebay and not having much luck. Since its primarily used by pubs there doesnt seem to be much info out there for a budding home kegger.
Heres a coupla pics....

