Sorry, I forgot to post the instructions from Epson.
My issue was I was get a strong color cast when converted to B&W. I was letting PS do color management and printing same as I would a color image. Here is what Epson said and it seems to work for me.
1. Open the image in Photoshop
2. Click File and select Print
3. Make all necessay changes in Photoshop Print Window. For Color Handling, slect Printer Manages Colors and Rendering Intent select Perceptural.
4. Click Print Settings in the Photoshop Print Window.
5. Select the Media Type and Size.
6. Click Advanced tab, since you are letting the printer handle the colors, in the Photoshop Print Window, for Color Management on the right select Photo Enhance and set Scence Correction to Gray.
7. Click OK and test the printer.
Worked for me, let me know if it help you as well.