Specifications

FORM 150.72-NM1 (908)
7
JOHNSON CONTROLS
PREPARATION – POWER ON .................................................................................................................107
Switch Settings ..................................................................................................................................107
Compressor Heaters .........................................................................................................................107
Water System .....................................................................................................................................107
Flow Switch ........................................................................................................................................107
Temperature Sensor(s) .....................................................................................................................107
EQUIPMENT STARTUP CHECKLIST ......................................................................................................108
Checking the System Prior To Initial Start (No Power) ..................................................................108
Unit Checks ....................................................................................................................................108
Compressor Heaters (Power On – 24 Hours Prior To Start) ..........................................................108
Panel Checks (Power On – Both Unit Switch Off) ........................................................................108
SETPOINTS ENTRY LIST .........................................................................................................................109
CHECKING SUPERHEAT AND SUBCOOLING ....................................................................................... 110
LEAK CHECKING .....................................................................................................................................110
UNIT OPERATING SEQUENCE ............................................................................................................... 111
SECTION 7 – UNIT CONTROLS ..................................................................................................................... 112
INTRODUCTION .......................................................................................................................................112
IPU II and I/O Boards .........................................................................................................................112
Unit Switch .........................................................................................................................................113
Keypad ................................................................................................................................................113
Battery Back-up .................................................................................................................................113
Transformer .......................................................................................................................................113
Programming # of Compressors ......................................................................................................113
“STATUS” KEY .........................................................................................................................................114
Unit Status ..........................................................................................................................................114
General Status Messages .................................................................................................................114
Fault Safety Status Messages ..........................................................................................................116
Status Key Messages ........................................................................................................................119
DISPLAY/PRINT KEYS .............................................................................................................................120
Oper Data Key ....................................................................................................................................120
Oper Data Quick Reference List .......................................................................................................123
Print Key .............................................................................................................................................124
Operating Data Printout ....................................................................................................................124
History Printout .................................................................................................................................125
History Displays ................................................................................................................................125
Software Version ...............................................................................................................................127
“ENTRY” KEYS .........................................................................................................................................128
Up and Down Arrow Keys .................................................................................................................128
Enter/adv Key .....................................................................................................................................128
“SETPOINTS” KEYS ................................................................................................................................129
Cooling Setpoints ..............................................................................................................................129
Leaving Chilled Liquid Control ........................................................................................................129
Return Chilled Liquid Control ..........................................................................................................130
Remote Setpoint Control ..................................................................................................................130
TABLE OF CONTENTS (CONT’D)