Digital BW, The Print

A very green newbie here, with a 220. I've read the material on the
MIS web site regarding ink compatability, but I'm still unclear on
just what needs to be done in the way of cleaning/purging/etc when
changing inks. I'm currently using the UT-R2 ink set, with Eboni.

What, other than cart replacement, do I need to do to change from:

1) Eboni-PK and vice versa in the black position?
2) Neutral to warm and vice versa in the color positions?

And while the 220 will probably remain dedicated to B&W, what would I
need to do to install the standard epson dye carts? And to go from the
standard epson dye-based carts back to UT-R2?

Thanks for any enlightenment...