Fist ACF5 export. IN ACF4 there is an export to code that exports the php needed to register a field using code. ACF5 improves this by allow you to export to JSON format and import that file into another site.
As far as exporting manually, yes, if you export the posts of post_type ‘acf’ and all the meta values associated with those posts it should export the field groups and import them. This should also be possible using the standard WP export and import by only exporting “acf” posts. The only extra setting you might get would be your username and you can assign the imported posts to a different user.
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