D–EOMWC00A07-16EN
Table of Contents
INTRODUCTION .......................................... 2
CONTROLLER OPERATING LIMITS:.... 3
CONTROLLER FEATURES ....................... 3
GENERAL DESCRIPTION .......................... 4
OPERATION COMMANDS LAYOUT ................ 4
CONTROLLER DESCRIPTION .......................... 5
HARDWARE STRUCTURE ............................... 5
SYSTEM ARCHITECTURE ............................... 7
CONTROL NETWORK DETAILS ....................... 8
SEQUENCE OF OPERATION .................... 9
CONTROLLER OPERATION................... 12
MICROTECH III INPUTS/OUTPUTS............... 12
EXTENSION I/O COMPRESSOR #1 TO #3 ...... 13
I/O EXV CIRCUIT #1 TO #3 ......................... 13
EXTENSION I/O FAN MODULE CIRCUIT #2 . 14
EXTENSION I/O FAN MODULE CIRCUIT #3 . 14
EXTENSION I/O UNIT HEAT PUMP .............. 14
SETPOINTS ................................................... 15
UNIT FUNCTIONS ...................................... 18
CALCULATIONS ........................................... 18
UNIT MODEL ............................................... 18
UNIT ENABLE .............................................. 18
UNIT MODE SELECTION .............................. 18
UNIT CONTROL STATES .............................. 19
UNIT STATUS .............................................. 20
ICE MODE START DELAY ............................ 20
EVAPORATOR PUMP CONTROL ................... 20
CONDENSER PUMP CONTROL ...................... 21
CONDENSATION CONTROL .......................... 22
LEAVING WATER TEMPERATURE (LWT)
RESET .......................................................... 23
UNIT CAPACITY CONTROL .......................... 25
UNIT CAPACITY OVERRIDES ....................... 27
CIRCUIT FUNCTIONS .............................. 29
CALCULATIONS ........................................... 29
CIRCUIT CONTROL LOGIC ........................... 29
CIRCUIT STATUS ......................................... 30
COMPRESSOR CONTROL .............................. 31
PRESSURE CONDENSATION CONTROL .......... 33
EXV CONTROL ........................................... 34
LIQUID INJECTION ....................................... 35
ALARMS AND EVENTS ............................ 36
SIGNALING ALARMS ................................... 36
CLEARING ALARMS .................................... 36
DESCRIPTION OF ALARMS ........................... 36
UNIT EVENTS .............................................. 38
CIRCUIT STOP ALARMS ............................... 38
CIRCUIT EVENTS ......................................... 42
ALARM LOGGING ........................................ 44
USING THE CONTROLLER..................... 45
NAVIGATING ............................................... 46
OPTIONAL REMOTE USER INTERFACE
......................................................................... 54
START-UP AND SHUTDOWN .................. 56
TEMPORARY SHUTDOWN ............................ 56
EXTENDED (SEASONAL) SHUTDOWN .......... 57
BASIC CONTROL SYSTEM
DIAGNOSTIC............................................... 59
CONTROLLER MAINTENANCE ............ 61
APPENDIX .................................................... 62
DEFINITIONS................................................ 62
MASTER/SLAVE .......................................... 64
