JOHNSON CONTROLS
6
FORM 155.30-ICOM2.EN.UL
ISSUE DATE: 12/21/2018
TABLE OF CONTENTS (CONT'D)
SECTION 5 - COMMISSIONING ............................................................................................................................89
General Guidelines for Use ............................................................................................................................89
Before Operation ...................................................................................................................................89
Precautions for the Use of Water ...................................................................................................................90
Chilled Water Outlet Temperature Controller ..................................................................................................90
Liquid Level Gauges .......................................................................................................................................90
Start the Chiller ...............................................................................................................................................90
Stop the Chiller ............................................................................................................................................... 91
SECTION 6 – OPERATION ..................................................................................................................................103
YHAU-CL/CH Control Center ......................................................................................................................103
Common Items .............................................................................................................................................103
Change Numeric Values ...............................................................................................................................104
Operating Status ..........................................................................................................................................105
Failure ..........................................................................................................................................................120
Alarm ............................................................................................................................................................120
Control Parameter ........................................................................................................................................124
Valve Operation ............................................................................................................................................ 125
Date and Time ..............................................................................................................................................125
Select Unit ....................................................................................................................................................126
Select Language ..........................................................................................................................................126
Safety Switches ............................................................................................................................................ 126
SECTION 7 – MAINTENANCE ............................................................................................................................. 129
Valve Inspection ...........................................................................................................................................129
Solenoid Valves ............................................................................................................................................ 129
Pump Shut Off Valves ..................................................................................................................................129
Air Purge Valves And Drain Valves For Chilled Water, Cooling Water, And Hot Water ................................ 129
Purge Valves ................................................................................................................................................129
Start the Chiller After It Has Been Stopped for A Long Period .....................................................................130
Checks Before Operation Starts ..........................................................................................................130
Checks After Operation Starts .............................................................................................................130
Purge Procedure ..........................................................................................................................................130
Capacity Check Method of Vacuum Pump ................................................................................................... 130
Manual Method To Purge Air Directly From Absorber ..................................................................................131
Manual Method To Purge Non-Condensable Gas From Purging Tank ........................................................ 132
Automatic Method To Purge Non-Condensable Gas From Purging Tank .................................................... 132
Refrigerant Refining Method ........................................................................................................................135
Manual Refrigerant Blowdown and Diluting Method ....................................................................................135
Decrystallization Method ..............................................................................................................................136
Indications of Crystallization ................................................................................................................ 136
Decrystallization ..................................................................................................................................136
Precautions for De-crystallization ........................................................................................................ 137
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