[QUOTE=Infraredsurvey.com;16848]Shade but do not enclose the unit..The hot discharge air will recirculated back into the unit and cause hi head pressure and trip- you need clearance to draw air in the sides and blow straight up and out.[/QUOTE]
This was great advice. I couldn't have said it better myself. Covering it in general would not be advised. Having something in the general vicinity to shade the unit from the sun is the way to go. Good luck to you.