I am assuming that you have troubleshot the unit and are confident that the e;lement is toast. As the thermostat and the contriol board could also give a no heat symptom.

Remove power/unplug the machine.
Remove the kick plate.
Remove the wires from the element.
Undo the nuts
Replace the element.
Be careful when undoing the nuts as they are not very robust.

This may also help though I am not sure if it is an exact match to your unit
http://frigidaireservicetips.com/pdfs/484_2.pdf