Oil charging procedure..................................................................................................................... 27
Troubleshooting........................................................................................................................................... 28
Maintenance................................................................................................................................................. 31
Renewal parts.................................................................................................................................... 31
Checking system for leaks................................................................................................................ 31
Conducting an R-22 pressure test................................................................................................... 31
Evacuation and dehydration of unit................................................................................................ 32
Vacuum testing.................................................................................................................................. 33
Vacuum dehydration......................................................................................................................... 33
Operation........................................................................................................................................... 33
Refrigerant charging......................................................................................................................... 34
Checking the refrigerant charge during unit shutdown.............................................................. 35
Handling refrigerant for dismantling and repairs........................................................................ 35
Megging the motor - mechanical starter....................................................................................... 36
Megging the motor - VFD powered or solid state soft starter.................................................... 36
Compressor........................................................................................................................................ 40
Electrical controls.............................................................................................................................. 40
Preventive maintenance.............................................................................................................................. 41
Compressor........................................................................................................................................ 41
Compressor motor............................................................................................................................ 41
Greased bearings.............................................................................................................................. 41
Leak testing........................................................................................................................................ 42
Evaporator and condenser............................................................................................................... 42
Oil return system............................................................................................................................... 43
Electrical controls.............................................................................................................................. 43
Model YK Style G R-134a or R-513A4
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