York DM090 Installation Manual

Also see for PREDATOR DM 090: Installation manual Technical guide Installation manual Technical guide Installation instruction

Contents

127408-YIM-B-0606Unitary Products Group 15Note orientation. Panel is “insulation” side up.CONDENSATE DRAINThe side condensate drain is reversible and maybe re-ori-ented to the rear of the cabinet to facilitate condensate pip-ing. A condensate drain connection is available through thebase pan for piping inside the roof curb. Trap the connectionper Figure 16: Condensate Drain. The trap and drain linesshould be protected from freezing.Plumbing must conform to local codes. Use a sealing com-pound on male pipe threads. Install condensate drain linefrom the 3/4 inch (19 mm) NPT female connection on the unitto an open drain.COMPRESSORSThe compressors are mounted on elastomer insulators. Themounting bolts have been fully tightened for shipping.FILTERSTwo-inch filters are supplied with each unit. One-inch filtersmay be used with no modification to the filter racks. Filtersmust always be installed ahead of evaporator coil and mustbe kept clean or replaced with same size and type. Dirty fil-ters reduce the capacity of the unit and result in frosted coilsor safety shutdown. All units use four (4) 20”x25”x2” filters.The unit should not be operated without filters properlyinstalled.When fastening ductwork to side duct flanges onunit, insert screws through duct flanges only. DONOT insert screws through casing. Outdoor duct-work must be insulated and water-proofed.FIGURE 13 - SIDE PANELS WITH HOLE PLUGSFIGURE 14 - RETURN DOWNFLOW PLENUM WITHPANELFIGURE 15 - DISCHARGE PANEL IN PLACEFIGURE 16 - CONDENSATE DRAINDo not loosen the compressor mounting bolts.Make sure that panel latches are properly positionedon the unit to maintain an airtight seal.3"Minimum(76.2mm)