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From inside (document excerpt):
24APA Performancet Series Air Conditioner with Puronr Refrigerant 1 1/2 to 5 Nominal Tons (Size 18 To 60) Installation Instructions TABLE OF CONTENTS PAGE SAFETY CONSIDERATIONS 2 INSTALLATION RECOMMENDATIONS 2 INSTALLATION 3 – 9, 14 Step 1 – Check Equipment & Jobsite 3 Step 2 – Install on Solid Pad 3 Step 3 – Clearance Requirements . 3 Step 4 – Operating Ambient . 3 Step 5 – Install TXV . 3 – 4 Step 6 – Make Piping Connections 5 – 7 Step 7 – Make Electrical Connections 7 – 8 Step 8 – Compressor Crankcase Heater 8 Step 9 – Install Electrical Accessories 8 Step 10- Check OCT and OAT Thermistor Attachment 8 Step 11 – Start-Up .
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8 – 9 Step 12 – Check Charge . 9, 14 the environmentally sound refrigerant GENERAL SEQUENCE OF OPERATION 9 CONTROL FUNCTIONS AND SEQUENCE OF OPERATION . 10 – 11 Fig. 1 24APA TROUBLESHOOTING 11 – 12 FINAL CHECKS . 13 CARE AND MAINTENANCE 13 SUBCOOLING TABLE 14 24 VOLT CONNECTION DIAGRAMS . 15 – 16 PURONR REFRIGERANT QUICK REF. GUIDE . 17 NOTE: Read the entire instruction manual before starting the installation. SAFETY CONSIDERATIONS Improper installation, adjustment, alteration, service, maintenance, or use can cause explosion, fire, electrical shock, or other conditions which may cause death, personal injury, or property damage. Consult a qualified installer, service agency, or your distributor or branch for information or assistance. The qualified installer or agency must use factory-authorized kits or accessories when modifying this product. Refer to the individual instructions packaged with the kits or accessories when installing. Follow all safety codes. Wear safety glasses, protective clothing, and work gloves. Use quenching cloth for brazing operations. Have fire extinguisher available. Read these instructions thoroughly and follow all warnings or cautions included in literature and attached to the unit. Consult local building codes and National Electrical Code (NEC) for special requirements. Recognize safety information. This is the safety-alert symbol ! When you see this symbol on the unit and in instructions or manuals, be alert to the potential for personal injury. Understand these signal words; DANGER, WARNING, and CAUTION. These words are used with the safety-alert symbol. DANGER identifies the most serious hazards which will result in severe personal injury or death. WARNING signifies hazards which could result in personal injury or death. CAUTION is used to identify unsafe practices which would result in minor personal injury or product and property damage. NOTE is used to highlight suggestions which will result in enhanced installation, reliability, or operation.