3 - Table of Contents
3Cooling Circuit ...........................................................................................................................................................................................................39
3.1Cooling Diagrams........................................................................................................................................................................................... 39
Monoblock ..................................................................................................................................................................................................39
Split................................................................................................................................................................................................................ 39
3.2Operations........................................................................................................................................................................................................40
Pump Down Stop......................................................................................................................................................................................40
Recover Refrigerant..................................................................................................................................................................................42
Vacuum Operation ...................................................................................................................................................................................42
Refrigerant Charge ...................................................................................................................................................................................43
Refrigerant leaks........................................................................................................................................................................................ 44
Leakage Test.....................................................................................................................................................................................44
Leak Search Procedure .................................................................................................................................................................45
Basic steps in brazing...............................................................................................................................................................................46
3.3Valves .................................................................................................................................................................................................................47
Shut-off Valves ...........................................................................................................................................................................................47
Opening Valve .................................................................................................................................................................................47
Opening Service Port (pos. 2)..................................................................................................................................................... 47
Valve and Gasket Replacement .................................................................................................................................................48
Service ports ...............................................................................................................................................................................................48
Valve Test ..........................................................................................................................................................................................50
Valve Replacement ........................................................................................................................................................................50
SAE Pressure Switch Replacement ...........................................................................................................................................51
Solenoid Valves.......................................................................................................................................................................................... 51
Solenoid Coil and Valve Tests..................................................................................................................................................... 51
Valve Disassemble.......................................................................................................................................................................... 52
YS 3-Way Replacement................................................................................................................................................................. 52
YK Capacity Control Valve Replacement ................................................................................................................................53
Non return Check Valves ........................................................................................................................................................................54
Check Valve Test .............................................................................................................................................................................54
Check Valve Replacement ...........................................................................................................................................................55
3.4Filter Drier and Sight Glass.......................................................................................................................................................................... 55
Filter Drier Replacement......................................................................................................................................................................... 56
3.5Orifice and Expansion Valve .......................................................................................................................................................................57
Expansion Valve Regulation.................................................................................................................................................................. 57
Orifice Replacement................................................................................................................................................................................. 58
Expansion Valve Replacement .............................................................................................................................................................60
3.6CPR Crankcase Pressure Regulation Valve.............................................................................................................................................62
CPR Regulating Procedure..................................................................................................................................................................... 62
