If you have a 14C, with the door that looks like the 11 and 12, it will do the warm-up purge feature. If your 14 is an Imperial or Superba, the pre-wash or rinse takes the place of the purge as it also does in the later models. The sad thing about the models that do not have the purge is that the initial fill loses so much heat to the cast iron pump, wash arm, dishes and the tank that the wash is not really a hot wash. Hobart's experience in the industrial and commercial kitchens worked against their home machines. In commercial and industrial kitchens, their larger machines had booster heaters, either electric, steam or gas, to maintain the water temperature while the small one rack undercounter machines were run frequently enough during meals that the machine stayed hot and usually had a 180F water supply at least for the rinse for sanitation purposes. The home machine had neither a water heating element nor repeated use to take advantage of the heated machine parts after the first load, in most cases.
I think Robert said that the 180F wash water in his YT cooled to something like 135F by the end of the wash which is not horrible, but the KA is not starting with 180F water. I think the book said you should have water at 150F. Granted this is 2.3 gallons instead of the smaller amount used to fill the YT, but the temperature still drops a lot.