PREVOST H3-41 Maintenance Manual page 875

SECTION 22: HEATING AND AIR CONDITIONING
CONTENTS
1. TORQUE TABLES ............................................................................................................................................. 5
1.1 HIGH CAPACITY COMPRESSOR (CENTRAL HVAC SYSTEM) ............................................................................. 5
1.2 HIGH/LOW PRESSURE SERVICE AND RECEIVER TANK VALVES ...................................................................... 6
1.3 IDLERS & TENSIONERS ................................................................................................................................... 6
1.4 SMALL A/C SYSTEM X3-45 VIP ....................................................................................................................... 7
1.5 PREHEATER .................................................................................................................................................... 8
2. HVAC SYSTEM OVERVIEW .............................................................................................................................. 9
2.1 CENTRAL HVAC SYSTEM EVAPORATOR COMPARTMENT ARRANGEMENT.................................................. 10
2.2 CENTRAL HVAC SYSTEM - H3 SERIES ........................................................................................................... 11
2.3 CENTRAL HVAC SYSTEM - X3 SERIES ........................................................................................................... 14
2.4 SMALL HVAC SYSTEM - H3 SERIES ............................................................................................................... 16
2.5 SMALL HVAC SYSTEM - X3 SERIES ............................................................................................................... 18
3. HVAC SYSTEM BASIC MAINTENANCE ........................................................................................................... 20
3.1 COIL CLEANING ............................................................................................................................................ 20
3.1.1 Driver's Unit ......................................................................................................................................... 20
3.1.2 Passenger's Unit .................................................................................................................................. 20
3.2 DRIVER'S UNIT AIR FILTER ............................................................................................................................ 21
3.3 PASSENGER'S UNIT AIR FILTER - H3 SERIES ................................................................................................. 21
3.4 PASSENGER'S UNIT AIR FILTER - X3 SERIES ................................................................................................. 22
3.5 OVERHEAD COMPARTMENT FAN AIR FILTER .............................................................................................. 22
3.6 COMPRESSOR BELTS .................................................................................................................................... 23
3.6.1 Belt Replacement - Central System ..................................................................................................... 23
3.6.2 Belt Tension Adjustment - Central System .......................................................................................... 24
3.6.3 Belt Tension Adjustment - Small Hvac System H-Series ...................................................................... 24
3.6.4 Belt Tension - Small Hvac System X-Series .......................................................................................... 24
3.7 TORCH BRAZING .......................................................................................................................................... 25
3.8 SOLDERING .................................................................................................................................................. 25
4. HVAC SYSTEM COMPONENTS ...................................................................................................................... 25
4.1 COMPRESSOR - CENTRAL A/C SYSTEM ....................................................................................................... 25
4.1.1 Suction and Discharge Hose Connection .............................................................................................. 25
4.1.2 Electro-Magnetic Clutch ....................................................................................................................... 26
4.1.3 Maintenance - Shaft Seal Oil Collecting Tube Drain ............................................................................ 26
4.1.4 Maintenance - Oil Color & Level Check ................................................................................................ 26
4.1.5 Maintenance - Compressor Oil Change ............................................................................................... 28
4.1.6 Troubleshooting Guide ......................................................................................................................... 28
4.2 COMPRESSOR - SMALL HVAC SYSTEM ........................................................................................................ 29
4.2.1 Removal - When The Compressor Is Operational ................................................................................ 29
4.2.2 Removal - When The Compressor Is Inoperable .................................................................................. 29
4.3 BRUSHLESS EVAPORATOR MOTOR .............................................................................................................. 30
4.3.1 Removal ............................................................................................................................................... 30
4.3.2 Installation ........................................................................................................................................... 31
4.4 CONDENSER (CENTRAL A/C) ........................................................................................................................ 32
4.4.1 Condenser Fan Control ......................................................................................................................... 32
4.4.2 Condenser Fan Removal ....................................................................................................................... 33
4.5 CONDENSER (SMALL A/C) ............................................................................................................................ 33
4.6 RECEIVER TANK ............................................................................................................................................ 34
4.7 FILTER-DRYER ............................................................................................................................................... 35
PA1621 Maintenance Manual All Series | Revised February 2019 1