Unless EMC is doing things very differently that is not how you enter the part home.
Those coordinates should be entered into a table somewhere then in your program you have the command G54 G00 X0. Y0. Z0. and the machines moves to thos coordinates because they are where the part zero is.
Actually having a Z value in the part zero is sometimes not good practice and it is better to leave that coordinate at zero and then bring your tool down under the tool length offset.