JOHNSON CONTROLS
6
FORM 150.72-ICOM6
ISSUE DATE: 12/29/2017
TABLE OF CONTENTS (CONT’D)
SECTION 6 – COMMISSIONING ............................................................................................................................99
Preparation – Power Off ................................................................................................................................. 99
Preparation – Power On ............................................................................................................................... 101
How to Commission the Pump VFD ............................................................................................................. 102
SECTION 7 – UNIT CONTROLS .......................................................................................................................... 107
Introduction ...................................................................................................................................................107
IPU II and I/O Boards ...................................................................................................................................107
Transformer .................................................................................................................................................108
Display ..........................................................................................................................................................108
Keypad .........................................................................................................................................................108
Unit Switch ...................................................................................................................................................108
Battery Back-Up ...........................................................................................................................................108
Programming # oOf Compressors ................................................................................................................108
Status Key ....................................................................................................................................................109
Display/Print Keys ........................................................................................................................................ 115
Entry Keys ....................................................................................................................................................123
Setpoints Keys .............................................................................................................................................124
Schedule/Advance Day Key ......................................................................................................................... 125
Program Key ................................................................................................................................................127
Unit Keys .....................................................................................................................................................131
Bacnet, Modbus, N2 and Yorktalk 2 Communications .................................................................................137
SECTION 8 – UNIT OPERATION .........................................................................................................................149
Capacity Control ........................................................................................................................................... 149
Suction Pressure Limit Controls ...................................................................................................................150
Discharge Pressure Limit Controls ............................................................................................................... 150
Leaving Chilled Liquid Control ......................................................................................................................150
Leaving Chilled Liquid Control Override to Reduce Cycling .........................................................................151
Leaving Chilled Liquid System Lead/Lag and Compressor Sequencing ......................................................152
Return Chilled Liquid Control .......................................................................................................................152
Return Chilled Liquid System Lead/Lag and Compressor Sequencing .......................................................153
Anti-Recycle Timer .......................................................................................................................................153
Anti-Coincidence Timer ................................................................................................................................153
Evaporator Pump Control and York Hydro Kit Pump Control .......................................................................153
Evaporator Heater Control ...........................................................................................................................154
Pumpdown Control ....................................................................................................................................... 154
Standard Condenser Fan Control ................................................................................................................154
Load Limiting ................................................................................................................................................158
Compressor Run Status ...............................................................................................................................158
Alarm Status ................................................................................................................................................. 158
Remote BAS/EMS Temperature Reset Using a Voltage or Current Signal .................................................. 159
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