The instruction booklet for installation is in small print and confusing.  For example, we purchased the 15,100 BTU unit and have no idea if we should remove the internal packaging or not.  There was an orange foam around a sensor and twist ties around cables and tubing.  The booklet says ""Except 22,000BTU model, other heavy duty models (24,000-28,500BYU) come with internal shipping packaging. THIS PACKAGING AND PLASTIC TIES MUST BE REMOVED PRIOR TO REINSTALLING THE AIR CONDITIONER BACK INTO THE CABINET.(See Fig 7)."  Can anyone tell us what to do?