Welcome to the forum. I'm not sure what you mean by ACR presets. Adjustments made in ACR can be saved as an XMP file. This is not the same structure as a LR develop preset. However if you have an XMP sidecar file associated with an image file, it will be applied when you import the image into LR provided the XMP sidecar file and the image file share the same file name.
If you have an older version of LR and are upgrading to LRCC/LR6, your LR presets will be included automatically when you open the older version catalog.
If you can explain in more detail what you mean by ACR presets, we can provide more specific help.