Camera must be set to Parallel Projection and you must set a standard view after setting the camera. This is what I see when I go to Print Preview and set the scale as you indicate. If you don’t want to print all of the copies of your floor plan at once, untick Use Model Extents.
One thing to consider though is that at this scale, it’s going to print on 6 sheets unless you have a printer that can handle large paper.
See what happens if you set things up as I describe and then type in values for the scale numbers.
This is all so much easier in LayOut, though.