Digital BW, The Print

I've been using colour inks in a Nomorecarts CIS with my 1280. I just 
purchased an MIS CFS that I'm going to use with UltraTone inks. Is 
there a way to flush the CIS and put it away for future use with 
colour inks? I may be purchasing another 1280 in the future and would 
like to be able to use it again.