PREVOST LE MIRAGE XLII BUS SHELLS User Manual

Section 22: HEATING AND AIR CONDITIONING
PA1553
2
9.3.2 Installation .............................................................................................................................24
9.3.3 Checking Operation of Brush in Holder ................................................................................24
9.3.4 Brush Wear Inspection and Replacement ............................................................................24
9.3.5 Seating Brushes....................................................................................................................25
9.3.6 Brush Holder Adjustment ......................................................................................................26
9.3.7 Checking Commutator...........................................................................................................27
9.4 CONDENSER...................................................................................................................................27
9.4.1 Condenser Fan Motors..........................................................................................................27
9.4.2 Condenser Fan Motor Removal............................................................................................27
9.4.3 Preliminary Disassembly.......................................................................................................27
9.4.4 Disassembly ..........................................................................................................................27
9.5 RECEIVER TANK..............................................................................................................................28
9.6 FILTER DRYER ................................................................................................................................28
9.6.1 Replacement .........................................................................................................................28
9.6.2 Moisture Indicator..................................................................................................................28
9.7 LIQUID REFRIGERANT SOLENOID VALVE...........................................................................................29
9.7.1 Manual Bypass......................................................................................................................29
9.7.2 Coil Replacement..................................................................................................................29
9.7.3 Valve Disassembly................................................................................................................29
9.7.4 Valve Reassembly.................................................................................................................29
9.8 EXPANSION VALVE..........................................................................................................................30
9.8.1 Cabin HVAC Unit...................................................................................................................30
9.8.2 Driver’s HVAC Unit................................................................................................................32
9.9 TORCH BRAZING .............................................................................................................................32
9.10 TROUBLESHOOTING ........................................................................................................................33
9.10.1 Expansion Valve....................................................................................................................33
9.10.2 A/C.........................................................................................................................................34
9.11 TEMPERATURES & PRESSURES .......................................................................................................36
9.12 LEAK TESTING ................................................................................................................................37
10. SMALL HVAC SYSTEM - AIR CONDITIONING COMPONENTS..................................................37
10.1 COMPRESSOR ................................................................................................................................37
10.2 MAGNETIC CLUTCH.........................................................................................................................37
10.3 MAINTENANCE PRECAUTIONS..........................................................................................................38
10.3.1 Work Area..............................................................................................................................38
10.3.2 Refrigerant Handling .............................................................................................................38
10.3.3 PAG Oil Handling ..................................................................................................................38
10.3.4 Refrigerant Recovery ............................................................................................................38
10.3.5 Compressor Handling............................................................................................................39
10.4 COMPRESSOR REMOVAL .................................................................................................................39
10.4.1 When the compressor is operational.....................................................................................39
10.4.2 When the compressor is inoperable......................................................................................39
10.5 INSTALLATION PRECAUTIONS...........................................................................................................39
10.6 COMPRESSOR OIL CHANGE.............................................................................................................41
10.6.1 Evacuating System Before Adding Refrigerant (Small System)...........................................41
10.7 OIL ADDITION..................................................................................................................................42
10.8 COMPRESSOR OIL CONTAMINATION.................................................................................................42
10.9 OIL RETURN OPERATION.................................................................................................................42
10.10 OIL CHECK INTERVAL ..................................................................................................................42
10.11 LEAK TEST PROCEDURE WITH COMPRESSOR REMOVED...............................................................42
10.12 TIGHTENING TORQUES.................................................................................................................43
10.13 CONDENSER COIL .......................................................................................................................44
10.14 FILTER DRYER ............................................................................................................................44
10.15 MOISTURE INDICATOR..................................................................................................................44
11. HEATING SYSTEM .........................................................................................................................44

PREVOST LE MIRAGE XLII BUS SHELLS Specifications

General

Brand	PREVOST
Model	LE MIRAGE XLII BUS SHELLS
Category	Buses
Language	English