Having the heat pump in the wrong position will reduce it's lifetime. Very likely there is a vat of lubricants at the bottom. If you flip it on the side one sid

Having the heat pump in the wrong position will reduce it's lifetime. Very likely there is a vat of lubricants at the bottom. If you flip it on the side one side of the pump cylinder will be flooded and possibly leak into the coolant curcuit. The top side will run dry and jam pretty fast.