Rival 18 Qt Roaster Oven with Buffet Server "keeping foods warm" Questions

...keeping warm is chicken stir fry for 40 people, and what temp. would you use to keep it warm, it's totally cooked through already. Turn the roaster on high for 30 minutes till the water is very hot ...

Trying to keep large # of hot dogs in buns warm. Do I put water in the roaster before adding the insert containing the hot dogs? The Owner's Guide for the Rival 18qt Roaster Oven with Buffet Server is

do I put water on the bottom of my hamilton beach roaster? Are you trying to keep things warm, like with a warmer tray? then it will be fine if you add water, and this can also keep the food a little ...