D–EOMAC00A04-14_02EN - 2/62
Contents
1 Introduction .................................................................................................................................................................... 5
2 Controller Features........................................................................................................................................................ 6
3 General Description....................................................................................................................................................... 7
3.1 General Description ................................................................................................................................................... 7
3.2 Control Panel Layout ................................................................................................................................................. 7
3.3 Hardware Structure .................................................................................................................................................... 7
3.4 System Architecture ................................................................................................................................................... 8
3.4.1 Control network details ......................................................................................................................................... 9
4 Sequence of Operation ............................................................................................................................................... 10
5 Controller Operation.................................................................................................................................................... 13
5.1 MicroTech Inputs/Outputs ........................................................................................................................................ 13
5.1.1 Analog Inputs ..................................................................................................................................................... 13
5.1.2 Analog Outputs................................................................................................................................................... 13
5.1.3 Digital Inputs....................................................................................................................................................... 13
5.1.4 Digital Outputs .................................................................................................................................................... 13
5.2 Extension I/O Compressor #1 to #3 ......................................................................................................................... 14
5.2.1 Analog Inputs ..................................................................................................................................................... 14
5.2.2 Analog Outputs................................................................................................................................................... 14
5.2.3 Digital Inputs....................................................................................................................................................... 14
5.2.4 Digital Outputs .................................................................................................................................................... 14
5.3 I/O EXV Circuit #1 to #3 ........................................................................................................................................... 14
5.3.1 Analog Inputs ..................................................................................................................................................... 14
5.3.2 Analog Outputs................................................................................................................................................... 14
5.3.3 Digital Inputs....................................................................................................................................................... 14
5.3.4 Digital Outputs .................................................................................................................................................... 14
5.4 Extension I/O Fan Module Circuit #1 & 2................................................................................................................. 15
5.4.1 Digital Inputs....................................................................................................................................................... 15
5.4.2 Digital Outputs .................................................................................................................................................... 15
5.5 Extension I/O Fan Module Circuit #3 ....................................................................................................................... 15
5.5.1 Digital Outputs .................................................................................................................................................... 15
5.6 Extension I/O Unit Alarm & Limiting ......................................................................................................................... 15
5.6.1 Analog Inputs ..................................................................................................................................................... 15
5.6.2 Analog Outputs................................................................................................................................................... 15
5.6.3 Digital Inputs....................................................................................................................................................... 15
5.6.4 Digital Outputs .................................................................................................................................................... 15
5.7 Setpoints .................................................................................................................................................................. 16
5.7.1 Auto Adjusted Ranges ....................................................................................................................................... 19
5.7.2 Dynamic Default Values ..................................................................................................................................... 19
6 Unit Functions.............................................................................................................................................................. 20
6.1 Calculations.............................................................................................................................................................. 20
6.1.1 LWT Slope.......................................................................................................................................................... 20
6.1.2 Pulldown Rate .................................................................................................................................................... 20
6.2 Unit Type .................................................................................................................................................................. 20
6.3 Unit Enable............................................................................................................................................................... 20
6.4 Unit Mode Selection ................................................................................................................................................. 20
6.4.1 Glycol Configuration ........................................................................................................................................... 21
6.5 Unit Control States ................................................................................................................................................... 21
6.6 Unit Status................................................................................................................................................................ 22
6.7 Ice Mode Start Delay ............................................................................................................................................... 22
6.8 Evaporator Pump Control ........................................................................................................................................ 22
6.8.1 Pump Selection .................................................................................................................................................. 22
6.8.2 Primary/Standby Pump Staging ......................................................................................................................... 23
6.8.3 Auto Control ....................................................................................................................................................... 23
6.9 Noise Reduction ....................................................................................................................................................... 23
6.10 Leaving Water Temperature (LWT) Reset............................................................................................................... 23
6.10.1 LWT Target ........................................................................................................................................................ 23
6.10.2 Leaving Water Temperature (LWT) Reset ......................................................................................................... 23
6.10.3 4-20 mA External Signal Reset .......................................................................................................................... 24
6.10.4 Outside Air Temperature (OAT) Reset............................................................................................................... 24
6.11 Unit Capacity Control ............................................................................................................................................... 25
6.11.1 Compressor Staging in Cool Mode .................................................................................................................... 25
6.11.2 Compressor Staging in Ice Mode ....................................................................................................................... 25
6.11.3 Staging Sequence .............................................................................................................................................. 25
6.11.4 Compressor Capacity Control In Cool Mode ..................................................................................................... 26
6.11.5 Load/Unload Sequence ...................................................................................................................................... 26
6.11.6 Compressor Capacity Control In Ice Mode ........................................................................................................ 26
6.12 Unit Capacity Overrides ........................................................................................................................................... 26
