York YHAU-CW Manual page 7

FORM 155.31-ICOM2.EN.UL
ISSUE DATE: 12/21/2018
SECTION 7 - MAINTENANCE .............................................................................................................................131
Valve Inspection ........................................................................................................................................... 131
Solenoid Valves ............................................................................................................................................ 131
Pump Shut Off Valves .................................................................................................................................. 131
Air Purging Valves and Draining Valves ....................................................................................................... 131
Purging Valves.............................................................................................................................................. 131
Start the Chiller After It Has Been Stopped for A Long Period ..................................................................... 132
Checks Before Operation Starts .......................................................................................................... 132
Checks After Operation Starts ............................................................................................................. 132
Purge Procedure .......................................................................................................................................... 132
Capacity Check Method of Vacuum Pump ................................................................................................... 132
Manual Method to Purge Non-condensable Gas Directly from Absorber with Vacuum Pump ..................... 133
Manual Method to Purge Non-condensable Gas from Purging Tank with Vacuum Pump ........................... 134
Automatic Method to Purge Non-condensable Gas from Purging Tank ....................................................... 134
Refrigerant Refining Method ........................................................................................................................ 137
Manual Refrigerant Blow Down and Diluting Method ................................................................................... 137
Decrystallization Method .............................................................................................................................. 138
Indications of Crystallization ................................................................................................................138
Decrystallization ..................................................................................................................................138
Precautions for De-crystallization ........................................................................................................ 139
Maintenance Items ....................................................................................................................................... 139
Refrigerant Pump Manual Stop ........................................................................................................... 142
Purge Manual Start and Stop .............................................................................................................. 142
Lifespan for Various Parts ............................................................................................................................ 142
Water Quality Control ................................................................................................................................... 144
Chemical Water Treatment ........................................................................................................................... 144
Replacement of Water ................................................................................................................................. 144
Treatment for Long Stoppage of the Absorption Chiller ............................................................................... 145
Chemical Treatment .................................................................................................................................... 145
Flow Speed in Tubes ................................................................................................................................... 145
Storage Method of the Chiller ....................................................................................................................... 150
Wet Storage Method ...........................................................................................................................150
Dry Storage Method ............................................................................................................................151
Precautions Against External Damage ......................................................................................................... 151
SECTION 8 - TROUBLESHOOTING ...................................................................................................................157
Troubleshooting Performance Issues ........................................................................................................... 161
Vacuum Pump .............................................................................................................................................. 162
Abnormal Solution and Refrigerant Levels ................................................................................................... 163
Insufficient Vacuum Levels ........................................................................................................................... 164
Actions to Take Against Power Failure ......................................................................................................... 166
SECTION 9 - DECOMMISSIONING, DISMANTLING, AND DISPOSAL ............................................................. 167
JOHNSON CONTROLS
TABLE OF CONTENTS (CONT'D)
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