Just do it in whatever setup you're using in Production Manager. It's about the 4th tab over in the setup specifications dialog or the job dialog for that matter, the tab that looks like a printer. You can set the heaters from the control panel but, if memory serves, they still won't start to heat until you send it something to print. You can setup the heaters as well as a pre-heat option in the Menu->Setup->Media Type>... menus. This, I think, sets the amount of time the printer will keep the heaters on waiting for a print job. Have at it but it doesn't take all that long to heat up if you simply leave it alone.