saftey

Can I hang this vertically? the manufacturer didnt say no but they said “ it is designed to hang horizontally”

so I’m wondering if how I have my window unit wired could cause stress on the compressor and shorten the lifespan. It’s got all the digital controls in it so when I run it through my controller and tell the unit to turn on it’s got a pretty long delay befor the comp actually cycles on. So I...