JOHNSON CONTROLS
6
FORM 160.81-NOM1
ISSUE DATE: 10/3/2020
TABLE OF CONTENTS (CONT'D)
Capacity Control ............................................................................................................................................ 51
Need for Maintenance or Service ................................................................................................................... 52
Normal Safety Shutdown and Repairs ...........................................................................................................52
Safety Shutdowns ..........................................................................................................................................52
Cycling Shutdowns ......................................................................................................................................... 52
Stopping the System ......................................................................................................................................53
Prolonged Shutdown ......................................................................................................................................53
Start-Up After Prolonged Shutdown ...............................................................................................................53
SECTION 4 – OPERATING INSPECTIONS ........................................................................................................55
General ...........................................................................................................................................................55
SECTION 5 – MAINTENANCE .............................................................................................................................57
General ...........................................................................................................................................................57
Compressor Oil ..............................................................................................................................................58
Charging Unit with Oil .....................................................................................................................................58
Oil Temperature Control ................................................................................................................................60
Oil Filter ..........................................................................................................................................................60
Oil Filter Replacement .................................................................................................................................... 61
Filter Drier Replacement ................................................................................................................................61
Determining Correct Refrigerant Charge Level ..............................................................................................62
Refrigerant Charging ......................................................................................................................................62
Refrigerant Leak Checking ............................................................................................................................. 62
Pressure Connections ....................................................................................................................................62
Condensers and Evaporators .........................................................................................................................63
Cleaning Evaporator and Condenser Tubes ..................................................................................................63
Condenser Water Side Tube Cleaning Procedure ........................................................................................63
Evaporator Tubes ...........................................................................................................................................64
Megohm the Motor ..........................................................................................................................................65
Checking System for Leaks ............................................................................................................................65
Evacuation and Dehydration of Unit ............................................................................................................... 66
Checking the Refrigerant Charge During Unit Shutdown ..................................................................................66
Handling Refrigerant for Dismantling and Repairs .........................................................................................67
Tube Cleaning Procedures ............................................................................................................................. 67
Commercial Acid Cleaning .............................................................................................................................67
Testing for Evaporator and Condenser Tube Leaks ......................................................................................... 67
Compressor .................................................................................................................................................... 68
Vibration Analysis ...........................................................................................................................................68
Electrical Controls ..........................................................................................................................................68
SECTION 6 – TROUBLESHOOTING ..................................................................................................................71
Troubleshooting Guide ...................................................................................................................................71
Abnormal Operation, Analysis and Correction ...............................................................................................71
Troubleshooting the Rotary Screw Compressor and Oil Separation System .................................................71
Pressure/Temperature Conversion Tables .....................................................................................................73
Temperature Conversion Tables .....................................................................................................................74
Temperature ...................................................................................................................................................75
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