4
YORK INTERNATIONAL
TABLE OF CONTENTS (CONT’D)
Compressor Components .................................... 126
System Startup Checklist .................................... 132
Unit Checks ........................................................... 132
Panel Checks .......................................................... 133
Initial Start-up ..................................................... 134
Checking Subcooling and Superheat ................. 134
Checking Economizer Superheat ....................... 135
Leak Checking ..................................................... 135
SECTION
8
MICROPANEL CONTENTS ...................................................................................... 136
Chiller Control Panel Programming and Data Access Keys ............................................. 136
Display and Status Information Keys ...................................................................................... 136
ON / OFF Rocker Switch ......................................................................................................... 136
Program & Setup Keys ............................................................................................................. 136
1. INTRODUCTION & PHYSICAL DESCRIPTION .......................................................................... 137
1.1
General .................................................................................................................. 137
1.2
Keypad & Display ................................................................................................. 137
1.3
Unit (Chiller) On / OFF Switch ............................................................................ 138
1.4
Microprocessor Board .......................................................................................... 138
1.5
Ancillary Circuit Boards ....................................................................................... 138
1.6
Circuit Breakers .................................................................................................... 139
1.7
Current Transformers (C.T.) ................................................................................. 139
1.8
Transformers ......................................................................................................... 140
1.9
Motor Protector Modules ..................................................................................... 140
1.10
EMS/BAS Controls ............................................................................................... 142
1.11
Microprocessor Board Layout .............................................................................. 144
1.12
Logic Section Layout ............................................................................................ 145
1.13
Anti-Recycle Timer ............................................................................................... 146
1.14
Anti-Coincidence Timer ....................................................................................... 146
1.15
Evaporator Pump Control ..................................................................................... 146
1.16
Compressor Heater Control .................................................................................. 146
1.17
Evaporator Heater Control .................................................................................... 146
1.18
Pumpdown (LLSV) Control ................................................................................. 146
1.19
Alarms ................................................................................................................... 146
1.20
Run Status (Chiller) .............................................................................................. 147
1.21
Lead / Lag Compressor Selection ......................................................................... 147
1.22
3 or 4 Compressor Chiller Configuration ............................................................. 147
2. STATUS KEY: GENERAL STATUS MESSAGES AND FAULT WARNINGS ............................. 148
2.1
General .................................................................................................................. 148
2.2
General Status Messages ...................................................................................... 148
2.3
Unit Warnings ....................................................................................................... 149
2.4
Anticipation Control Status Messages .................................................................. 150
2.5
Unit Fault Status Messages ................................................................................... 151
2.6
System Fault (Safety) Status Messages ................................................................ 152
2.7
Printout on Fault Shutdown .................................................................................. 155
3. DISPLAY KEYS & OPTION SWITCHES ...................................................................................... 156
3.1
General .................................................................................................................. 156
3.2
Chilled Liquid Temps Key .................................................................................... 156
3.3
System # Data Keys .............................................................................................. 157
3.4
Ambient Temp Key ............................................................................................... 157
3.5
Motor Current Key ................................................................................................ 157
3.6
Operating HRS / Start Counter Key ..................................................................... 158
3.7
Options Key & Dip Switch Settings ..................................................................... 158
3.8
Function Key ......................................................................................................... 160
Summary of Contents for MILLENNIUM YCAS 250
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