TABLE OF CONTENTS
5
Main Chiller Controller Technical Guide
ECONOMIZER SUBCOOL MODULE SEQUENCE OF OPERATION ................................................. 24
Points of Information and Control .......................................................................................................................... 24
Sequence ............................................................................................................................................................... 24
FAULTS .......................................................................................................................................... 24
INSTALLATION & WIRING ............................................................................................................. 26
Main Chiller Controller Inputs & Outputs ................................................................................................................ 26
Chiller Expansion Module Inputs & Outputs .......................................................................................................... 26
Compressor Circuit Module Inputs & Outputs ........................................................................................................ 27
Economizer Subcool Module Inputs & Outputs ..................................................................................................... 27
Main Chiller Controller Input Wiring ....................................................................................................................... 28
Main Chiller Controller Output Wiring .................................................................................................................... 29
Chiller Expansion Module Wiring ........................................................................................................................... 30
Compressor Circuit Module Wiring ........................................................................................................................ 31
Economizer Subcool Module Wiring ...................................................................................................................... 32
TROUBLESHOOTING ..................................................................................................................... 33
Main Chiller Components ....................................................................................................................................... 33
Main Chiller Controller & Chiller Expansion Module LED Locations ...................................................................... 34
Compressor Circuit Module & Economizer Subcool Module LED Locations ......................................................... 36
Thermistor Temperature Sensor Testing ................................................................................................................ 37
Suction Pressure Transducer Testing .................................................................................................................... 38
Discharge Pressure Transducer Testing ................................................................................................................ 39
Important Wiring Considerations ............................................................................................................................ 40
APPENDIX A - LCD DISPLAY SCREENS ........................................................................................ 42
Main Chiller Controller LCD Screens ..................................................................................................................... 42
Compressor Circuit Module LCD Screens ............................................................................................................. 46
Economizer Subcool Module LCD Screens ........................................................................................................... 47
APPENDIX B - BACnet
®
Connection to MS/TP Network, BACnet
®
Parameters............................ 54
