® FOR DISTRIBUTION USE ONLY - NOT TO BE USED AT POINT OF RETAIL SALE251933-YTG-J-1009TECHNICAL GUIDE DescriptionYORK ® ZF/ZR/XP Series units are convertible single packagehigh efficiency rooftops with a common roof curb for the 3, 4and 5 Ton sizes. Although the units are primarily designed forcurb mounting on a roof, they can also be slab-mounted atground level or set on steel beams above a finished roof.All ZF/ZR/XP Series units are self-contained and assembled onrigid full perimeter base rails allowing for overhead rigging.Every unit is completely charged, wired, piped and tested at thefactory to provide a quick and easy field installation.All models (including those with an economizer) are convertiblebetween bottom and horizontal duct connections.ZF/ZR Series units are available in the following configurations:cooling only, cooling with electric heat, and cooling with one ortwo stage gas heat. Electric heaters are available as factory-installed option or field installed accessory.XP Series units are available in the following configurations:cooling and heating only and cooling and heating with electricheat.Tested in accordance with:R-410AZF / ZR / XP SERIES3 - 5 TON60 Hertz