3Make Piping Connections! WARNINGPERSONAL INJURY AND ENVIRONMENTALHAZARDFailure to follow this warning could result in personal injuryor death.Relieve pressure and recover all refrigerant before systemrepair or final unit disposal.Use all service ports and open all flow--control devices,including solenoid valves.CAUTION!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.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 more than 36 in.(914.4 mm).Outdoor units may be connected to indoor section using accessorytubing package or field--supplied refrigerant grade tubing of correctsize and condition. For tubing requirements beyond 80 ft/24.38 m,substantial capacity and performance losses can occur. Followingthe recommendations in the Long Line Guideline for Split--SystemAir Conditioners and Heat Pumps will reduce these losses. Refer toTable 1 for accessory requirements. Refer to Table 2 for fieldtubing diameters.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 IndoorUnitOutdoor unit contains correct system refrigerant charge foroperation with factory approved AHRI rated indoor unit whenconnected by 15 ft. (4.57 m) of field--supplied or factory--accessorytubing, and factory supplied filter drier. Check refrigerant chargefor maximum efficiency.Table 1 – Accessory UsageAccessoryREQUIRED FOR LOW--- AMBIENTCOOLING APPLICATIONS(Below 55°F / 12.8°C)REQUIRED FOR LONG LINEAPPLICATIONS* (Over 80 ft. / 24.38 m)Crankcase Heater Yes YesCompressor Start Assist Capacitor and Relay Yes YesEvaporator Freeze Thermostat Yes(For non ---Infinity systems only) NoLiquid Line Solenoid Valve No See Long--- Line Application GuidelineLow--- ambient Pressure Switch Yes(For non ---Infinity system only) NoSupport Feet Recommended NoThermal Expansion Valve (TXV)Hard Shutoff Yes YesWinter Start Control Yes(For non ---Infinity systems only) No* For tubing line sets between 80 and 200 ft. (24.38 and 60.96 m) and/or 20 ft. (6.09 m) vertical differential, refer to Residential Split--- System Longline Application Guideline.Table 2 – Refrigerant Connections and Recommended Liquid and Vapor Tube Diameters (In.)UNIT SIZELIQUID RATED VAPORup to 80 ft. (24.38 m)*Connection and TubeDiameterConnectionDiameterRated TubeDiameter18, 24, 30, 3/8 3/4 3/436, 37, 42, 43, 48 3/8 7/8 7/860 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 35 ft. (10.7 m) vertical differential 250 ft. (76.2 m) Total Equivalent Length),refer to the Residential Piping and Application Guideline --- Air Conditioners and Heat Pumps using Puron refrigerant.3. For alternate liquid line options on 18 ---42 size units, see Product Data or Residential Piping and Application Guidelinethe environmentally sound refrigerantThis product has been designed and manufactured to meetEnergy Star criteria for energy efficiency when matchedwith appropriate coil components. However, properrefrigerant charge and proper air flow are critical to achieverated capacity and efficiency. Installation of this productshould follow all manufacturing refrigerant charging and airflow instructions. Failure to confirm proper charge andair flow may reduce energy efficiency and shortenequipment life.Use of the AHRI CertifiedTM Mark indicates amanufacturer’sparticipation in theprogram For verificationof certification for individualproducts, go towww.ahridirectory.org.Ready for use in a Hybrid Heatr Duel Fuel system.24ANB6