PREVOST X3-45 Multiplex - Page 1144

Section 22: HEATING AND AIR CONDITIONING
PA1562
2
7.3.1 Removal ................................................................................................................................22
7.3.2 Installation .............................................................................................................................23
7.4 CONDENSER...................................................................................................................................23
7.4.1 Condenser Fan Motors..........................................................................................................23
7.4.2 Condenser Fan Motor Removal............................................................................................24
7.5 RECEIVER TANK..............................................................................................................................24
7.6 FILTER DRYER ................................................................................................................................24
7.6.1 Replacement .........................................................................................................................24
7.6.2 Moisture Indicator..................................................................................................................25
7.7 LIQUID REFRIGERANT SOLENOID VALVE ...........................................................................................25
7.7.1 Manual Bypass......................................................................................................................25
7.7.2 Coil Replacement..................................................................................................................25
7.7.3 Valve Disassembly................................................................................................................26
7.7.4 Valve Reassembly.................................................................................................................26
7.8 EXPANSION VALVE..........................................................................................................................26
7.9 TORCH BRAZING .............................................................................................................................29
7.10 TROUBLESHOOTING ........................................................................................................................30
7.10.1 Expansion Valve....................................................................................................................30
7.10.2 A/C.........................................................................................................................................31
7.11 TEMPERATURES & PRESSURES .......................................................................................................33
7.12 LEAK TESTING ................................................................................................................................34
8. AUXILIARY AIR CONDITIONING SYSTEM AND COMPONENTS...................................................34
8.1 COMPRESSOR ................................................................................................................................34
8.2 COMPRESSOR REMOVAL.................................................................................................................34
8.2.1 When the compressor is operational.....................................................................................34
8.2.2 When the compressor is inoperable......................................................................................34
8.2.3 Evacuating System Before Adding Refrigerant (Auxiliary System) ......................................35
8.3 OIL ADDITION..................................................................................................................................35
8.4 COMPRESSOR OIL CONTAMINATION.................................................................................................35
8.5 OIL RETURN OPERATION.................................................................................................................35
9. HEATING SYSTEM.............................................................................................................................37
9.1 DRAINING HEATING SYSTEM ............................................................................................................37
9.1.1 Draining Driver’s Heater Core...............................................................................................37
9.1.2 Draining Main Heater Core ...................................................................................................37
9.2 FILLING HEATING SYSTEM ...............................................................................................................38
9.3 BLEEDING HEATING SYSTEM ...........................................................................................................38
9.4 SOLDERING ....................................................................................................................................38
9.5 DRIVER’S HOT WATER PNEUMATIC VALVE ASSEMBLY ......................................................................39
9.5.1 Description ............................................................................................................................39
9.5.2 Pneumatic Water Valve Disassembly ...................................................................................39
9.5.3 Pneumatic Water Valve Reassembly....................................................................................39
9.5.4 Pilot Solenoid Valve ..............................................................................................................40
9.5.5 Valve Troubleshooting...........................................................................................................40
9.6 CENTRAL HOT WATER PNEUMATIC VALVE ASSEMBLY.......................................................................40
9.6.1 Description ............................................................................................................................40
9.6.2 Pneumatic Water Valve Disassembly ...................................................................................40
9.6.3 Pneumatic Water Valve Reassembly....................................................................................41
9.6.4 Pilot Solenoid Valve ..............................................................................................................41
9.6.5 Valve Troubleshooting...........................................................................................................41
9.7 WATER RECIRCULATING PUMP ........................................................................................................42
9.7.1 Removal ................................................................................................................................42
9.7.2 Disassembly..........................................................................................................................42
9.7.3 Brushes .................................................................................................................................42
9.7.4 Assembly...............................................................................................................................44