I have a very small window (narrow) Can you install an A/C on it's side and run or will it burn up the compressor? Thanks Jerry
Absolutely not on its side!!! I know of NO compressors that can be installed on there side the lubrication will not stay in the compressor and it will fail in a very short time! This is not a uninformed opinion I have EPA 608 universal license (3) and a 609 license. Laying a unit on its side during shipping is enough to destroy a unit if not left in the correct position for a few hours to 24 hours to allow the oil to return to the compressor.
Not likely. The drip runway would be useless, which could lead to indoor leaking, mold accumulation, or even dangerous condensation pooling in an unexpected and possibly mains-powered section of the guts. I've not seen an AC that was designed to fit either way (thought I've seen specifically-vertical ones).
You can always remove its back hood to visually make sure that water goes somewhere it's supposed to in that orientation, but I doubt any pre-sale info would enable you to establish that; a lot of service manual block/wiring diagrams vary from the product in your hands, and it would be hard to tell how water behaves from a flat drawing.
You might also consider a portable AC that just uses a small window opening or hole to vent instead of hold the entire AC unit.