Johnson Controls York YK - Page 4

Oil charging procedure..................................................................................................................... 25
Troubleshooting........................................................................................................................................... 26
Maintenance................................................................................................................................................. 28
Renewal parts.................................................................................................................................... 28
Checking system for leaks................................................................................................................ 28
Conducting a system pressure test................................................................................................ 28
System evacuation............................................................................................................................ 31
Refrigerant charging......................................................................................................................... 36
Checking and trimming the refrigerant charge............................................................................ 38
Checking the refrigerant charge during unit shutdown.............................................................. 39
Handling refrigerant for dismantling and repairs........................................................................ 39
Megging the motor........................................................................................................................... 41
Compressor........................................................................................................................................ 44
Electrical controls.............................................................................................................................. 44
Preventive maintenance.............................................................................................................................. 45
Compressor........................................................................................................................................ 45
Compressor motor............................................................................................................................ 45
Greased bearings.............................................................................................................................. 45
Motor relubrication instruction....................................................................................................... 45
Leak testing........................................................................................................................................ 52
Evaporator and condenser............................................................................................................... 52
Oil return system............................................................................................................................... 52
Electrical controls.............................................................................................................................. 52
Maintenance inspections.................................................................................................................. 52
Unit conversion............................................................................................................................................ 55
Model YK (Style H), R-134a and R-513A4