HVAC HVAC TABLE OF CONTENTS 10.1 GENERAL INFORMATION........................................................................................... 1 10.1.1 SPECIFICATIONS ......................................................................................................................... 1 10.1.2 TIGHTENING TORQUES............................................................................................................... 3 10.1.3 PRECAUTIONS ............................................................................................................................. 8 10.1.4 HVAC SYSTEM LAYOUT AND WORKING................................................................................. 10 10.1.5 COMPONENTS OF HVAC ........................................................................................................... 14 10.1.5.1 CONTROL PANEL ....................................................................................................................... 15 10.1.5.2 FRONT HVAC UNIT..................................................................................................................... 18 10.1.5.3 ROOF AC UNIT (if fitted) ............................................................................................................. 20 10.1.5.4 COMPRESSOR............................................................................................................................ 22 10.1.5.5 CONDENSER............................................................................................................................... 23 10.1.5.6 THERMISTER OR THERMO SENSOR....................................................................................... 24 10.1.5.7 TRINARY PRESSURE SWITCH.................................................................................................. 26 10.1.5.8 ACTUATOR.................................................................................................................................. 27 10.1.5.9 AIR INLET ACTUATOR................................................................................................................ 31 10.1.5.10 REAR BLOWER SWITCH............................................................................................................ 31 10.1.6 TROUBLESHOOTING ................................................................................................................. 33 10.2 MAINTENANCE.......................................................................................................... 46 10.2.1 PRELIMINARY INSPECTION ...................................................................................................... 46 A. AC SYSTEM PERFORMANCE TEST ......................................................................................... 46 B. LEAK DETECTION....................................................................................................................... 48 10.2.2 REGULAR MAINTENANCE ........................................................................................................ 48 A. REFRIGERANT RECOVERY, RECYCLING AND RECHARGING ............................................. 48
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