3On rooftop applications, locate unit at least 6 in. (152.4 mm) aboveroof surface.Operating AmbientThe minimum outdoor operating ambient in cooling mode is55_F/12.78_C without low ambient cooling enabled, and themaximum outdoor operating ambient in cooling mode is125_F/51.67_C. On Infinity communicating systems only, forboth 24ANA1 and 24ANA7 models, low ambient cooling isavailable to 0_F/--17.78_C.Make Piping ConnectionsPERSONAL INJURY AND ENVIRONMENTALHAZARDFailure to follow this warning could result in personalinjury or death.Relieve pressure and recover all refrigerant before systemrepair or final unit disposal Use all service ports and openall flow--control devices, including solenoid valves.! WARNINGCAUTION!UNIT DAMAGE HAZARDFailure to follow this caution may result in equipmentdamage or improper operation.Do not leave system open to atmosphere any longer thanminimum required for installation. POE oil in compressor isextremely susceptible to moisture absorption. Always keepends of tubing sealed during installation.CAUTION!UNIT DAMAGE HAZARDFailure to follow this caution may result in equipmentdamage or improper operation.If ANY refrigerant tubing is buried, provide a 6 in. (152.4mm) vertical rise at service valve. Refrigerant tubing lengthsup to 36 in. (914.4 mm) may be buried without furtherspecial consideration. Do not bury lines longer than 36 in.(914.4 mm).Outdoor units may be connected to indoor section usingfield--supplied refrigerant grade tubing of correct size andcondition. For tubing requirements beyond 80 ft (24.38 m),substantial capacity and performance losses can occur. Followingthe recommendations in the Residential Piping and LonglineGuideline will reduce these losses. Refer to Table 1 for field tubingdiameters. Refer to Table 2 for accessory requirements.There are no buried--line applications greater than 36 in. (914.4mm).If refrigerant tubes or indoor coil are exposed to atmosphere, theymust be evacuated to 500 microns to eliminate contamination andmoisture in the system.Outdoor Unit Connected to Factory Approved IndoorUnit:Outdoor unit contains correct system refrigerant charge foroperation with factory approved ARI rated indoor unit with highestsales volume when connected by 15 ft (4.57 m) of field--suppliedor factory--accessory tubing, and factory supplied filter drier.Check refrigerant charge for maximum efficiency.Table 1 – Refrigerant Connections and Recommended Liquid and Vapor Tube Diameters (in.)UNIT SIZELIQUID RATED VAPOR*ConnectionDiameterTubeDiameterConnectionDiameterTubeDiameter24ANA724 3/8 3/8 5/8 5/824ANA736 3/8 3/8 3/4 3/424ANA748 3/8 3/8 7/8 7/824ANA760 3/8 3/8 7/8 1--- 1/824ANA12424ANA13624ANA148 3/8 3/8 7/8 7/824ANA160 3/8 3/8 7/8 1--- 1/8* Units are rated with 25 ft. (7.6 m) of lineset. See Product Data sheet for performance data when using different size and length linesets.Notes:1. Do not apply capillary tube or fixed orifice indoor coils to these units.2. For Tubing Set lengths between 80 and 200 ft. (24.38 and 60.96 m) horizontal or 20 ft. (6.10 m) vertical differential (250 ft./76.2 m Total Equivalent Length),refer to the Residential Piping and Longline Guideline.the environmentally sound refrigerant REGISTEREDISO 9001:2000This product has been designed and manufactured tomeet Energy Star® criteria for energy efficiency whenmatched with appropriate coil components. However,proper refrigerant charge and proper air flow are criticalto achieve rated capacity and efficiency. Installation ofthis product should follow all manufacturing refrigerantcharging and air flow instructions. Failure to confirmproper charge and air flow may reduce energyefficiency and shorten equipment life.24ANA