Carrier 48HC D17 Series Service And Maintenance Instructions

Carrier 48HC D17 Series Service And Maintenance Instructions Manual pdf 1 page image

Service and Maintenance Instructions48HC*D17–D28Nominal 15 to 25 Tonswith Puron (R---410A) RefrigerantTABLE OF CONTENTSSAFETY CONSIDERATIONS 1. . . . . . . . . . . . . . . . . . . .UNIT ARRANGEMENT AND ACCESS 3. . . . . . . . . . .SUPPLY FAN (BLOWER) SECTION 4. . . . . . . . . . . . . .STAGED AIR VOLUME (SAV) CONTROL: 2--SPEEDFAN WITH VARIABLE FREQUENCY DRIVE (VFD) 6. . .ADDITIONAL VFD INSTALLATION ANDTROUBLESHOOTING 7. . . . . . . . . . . . . . . . . . . . . . . . . .MOTOR 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .CONDENSER COIL SERVICE 9. . . . . . . . . . . . . . . . . . .EVAPORATOR COILS 10. . . . . . . . . . . . . . . . . . . . . . . . .HUMIDI--MIZER ADAPTIVE DEHUMIDIFICATIONSYSTEM 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .THERMOSTATIC EXPANSION VALVE (TXV) 18. . . .PURONR (R--410A) REFRIGERANT 20. . . . . . . . . . . . .COOLING CHARGING CHARTS 22. . . . . . . . . . . . . . . .COMPRESSORS 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .CONVENIENCE OUTLETS 29. . . . . . . . . . . . . . . . . . . .SMOKE DETECTORS 30. . . . . . . . . . . . . . . . . . . . . . . . .INDICATORS 36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .PROTECTIVE DEVICES 37. . . . . . . . . . . . . . . . . . . . . . .PREMIERLINKt CONTROL 39. . . . . . . . . . . . . . . . . . .RTU--OPEN CONTROL SYSTEM 40. . . . . . . . . . . . . . . .SENSORY/ACCESSORY INSTALLATION 40. . . . . . . .GAS HEATING SYSTEM 42. . . . . . . . . . . . . . . . . . . . . .ECONOMI$ER SYSTEMS 53. . . . . . . . . . . . . . . . . . . . . .PRE--START--UP 62. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .START--UP, GENERAL 62. . . . . . . . . . . . . . . . . . . . . . . .START--UP, PREMIERLINK CONTROLS 64. . . . . . . . .START--UP, RTU--OPEN CONTROL 65. . . . . . . . . . . . . .FASTENER TORQUE VALUES 65. . . . . . . . . . . . . . . . .APPENDIX I. MODEL NUMBER SIGNIFICANCE 66.APPENDIX II. PHYSICAL DATA 67. . . . . . . . . . . . . . . .APPENDIX III. FAN PERFORMANCE 70. . . . . . . . . . .APPENDIX IV. WIRING DIAGRAMS 75. . . . . . . . . . . .APPENDIX V. MOTORMASTER SENSORLOCATIONS 88. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .UNIT START-UP CHECKLIST 89. . . . . . . . . . . . . . . . . .SAFETY CONSIDERATIONSInstallation and servicing of air-conditioning equipmentcan be hazardous due to system pressure and electricalcomponents. Only trained and qualified service personnelshould install, repair, or service air-conditioningequipment. Untrained personnel can perform the basicmaintenance functions of replacing filters. Trained servicepersonnel should perform all other operations.When working on air-conditioning equipment, observeprecautions in the literature, tags and labels attached tothe unit, and other safety precautions that can apply.Follow all safety codes. Wear safety glasses and workgloves. Use quenching cloth for unbrazing operations.Have fire extinguishers available for all brazingoperations.Follow all safety codes. Wear safety glasses and workgloves. Use quenching cloth for brazing operations. Havefire extinguisher available. Read these instructionsthoroughly and follow all warnings or cautions attached tothe unit. Consult local building codes and NationalElectrical Code (NEC) for special requirements.Recognize safety information. This is the safety--ALERTsymbol . When you see this symbol on the unit and ininstructions or manuals, be aware of the potential forphysical injury hazards.Understand the signal words DANGER, WARNING, andCAUTION. These words are used with the safety--ALERTsymbol. DANGER indicates a hazardous situation which,if not avoided, will result in death or severe personalinjury. WARNING indicates a hazardous situation which,if not avoided, could result in death or personal injury.CAUTION indicates a hazardous situation which, if notavoided, could result in minor to moderate injury orproduct and property damage. NOTICE is used to addresspractices not related to physical injury. NOTE is used to