HVAC TABLE OF CONTENTS 1 GENERAL INFORMATION ........................................................................................................................ 1 1.1. SPECIFICATIONS ................................................................................................................................. 1 1.2. TIGHTENING TORQUES ...................................................................................................................... 3 1.3. PRECAUTIONS ................................................................................................................................... 11 1.4. HVAC SYSTEM LAYOUT & WORKING.............................................................................................. 13 1.5. COMPONENTS OF HVAC .................................................................................................................. 17 1.5.1. CONTROL PANEL.................................................................................................................... 17 1.5.2. HVAC UNIT ............................................................................................................................... 20 1.5.3. COMPRESSOR ........................................................................................................................ 23 1.5.4. CONDENSOR & RECEIVER DRIER........................................................................................ 24 1.5.5. THERMISTOR / THERMO SENSOR ....................................................................................... 25 1.5.6. TRINARY PRESSURE SWITCH/ SENSOR ............................................................................. 28 1.5.7. AIR INLET ACTUATOR ............................................................................................................ 29 1.6. TROUBLESHOOTING......................................................................................................................... 30 2 MAINTAINANCE....................................................................................................................................... 44 2.1. PRELIMINARY INSPECTION.............................................................................................................. 44 2.2. REGULAR MAINTENANCE ................................................................................................................ 46 3 ON VEHICLE REPAIR .............................................................................................................................. 51 3.1. CONTROL PANEL ASSEMBLY .......................................................................................................... 51 3.2. COMPRESSOR ................................................................................................................................... 56 3.3. BLOWER.............................................................................................................................................. 56 3.4. BLOWER RESISTER .......................................................................................................................... 57 3.5. FILTER................................................................................................................................................. 57 3.6. TXV ...................................................................................................................................................... 58 3.7. PRESSURE SENSOR / SWITCH........................................................................................................ 58 3.8. HVAC UNIT.......................................................................................................................................... 59 3.9. CONDENSOR SEALING DUCT .......................................................................................................... 60 3.10. CONDENSOR.................................................................................................................................... 60 3.11. REFRIGERANT HOSES.................................................................................................................... 62 3.12. DO's & DON’T's ................................................................................................................................. 64 4. OVERHAULING HVAC UNIT ................................................................................................................... 65
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