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Daikin Luftkonditionering EWW2VZSSA2

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WATER COOLED CHILLER AND HEAT PUMPS WITH

INVERTER DRIVEN SCREW COMPRESSOR

MICROTECH CONTROLLER ™

REV

Date

01/2023

Replace

D-EOMZC00106- 5 17_0 EN

OPERATING MANUAL

D-EOMZC00106- 617_0 EN

D-EOMZC00106- 6 - 2/ 17_0 EN 66

TABLE OF CONTENTS

1 SAFETY CONSIDERATIONS ......................................................................................................................................... 6

1.1 General 6 ....................................................................................................................................................................

1.2 Avoid electrocution .................................................................................................................................................. 6

1.3 Safety Devices ........................................................................................................................................................ 6

1.3.1 General safety devices ................................................................................................................................... 6

1.3.2 Circuit safety devices 6 ......................................................................................................................................

1.3.3 Component safety devices ............................................................................................................................. 6

1.4 Available sensors .................................................................................................................................................... 8

1.4.1 Pressure transducers ..................................................................................................................................... 8

1.4.2 Temperature sensors ..................................................................................................................................... 8

1.4.3 Thermistors ..................................................................................................................................................... 8

1.4.4 Leak detectors ................................................................................................................................................ 8

1.5 Available Controls ................................................................................................................................................... 8

1.5.1 Evaporator pumps .......................................................................................................................................... 8

1.5.2 Condenser pumps (W/C units onl y) ............................................................................................................... 8

1.5.3 Compressors .................................................................................................................................................. 8

1.5.4 Expansion Valve ............................................................................................................................................. 8

1.5.5 Evaporator Flow Switch .................................................................................................................................. 8

1.5.6 Condenser Flow Switch .................................................................................................................................. 8

1.5.7 Evaporator Three Way Valve (Optional) ........................................................................................................ 9

1.5.8 Double setpoint ............................................................................................................................................... 9

1.5.9 Current limit (optional) .................................................................................................................................... 9

1.5.10 External Fault ................................................................................................................................................. 9

1.5.11 Rapid Restart (optional) 9 ..................................................................................................................................

1.5.12 Remote On-O ............................................................................................................................................... 9

1.5.13 General Alarm ................................................................................................................................................ 9

1.5.14 Compressor Status ......................................................................................................................................... 9

1.5.15 Circuit Alarm (optional) ................................................................................................................................... 9

1.5.16 Evaporator Pump Start ................................................................................................................................... 9

1.5.17 Condenser Pump Start (W/C units only) ........................................................................................................ 9

1.5.18 Demand limit ................................................................................................................................................... 9

1.5.19 Setpoint override .......................................................................................................................................... 10

2 GENERAL DESCRIPTION ........................................................................................................................................... 11

2.1 Basic Information .................................................................................................................................................. 11

2.2 Abbreviations used ................................................................................................................................................ 11

2.3 Controller Operating Limits ................................................................................................................................... 11

2.4 Controller Architecture .......................................................................................................................................... 11

2.5 Communication Modules ....................................................................................................................................... 12

3 USING THE CONTROLLER ......................................................................................................................................... 13

3.1 General Recommendation .................................................................................................................................... 13

3.2 Navigating ............................................................................................................................................................. 13

3.3 Passwords ............................................................................................................................................................. 14

3.4 Editing ................................................................................................................................................................... 14

3.5 Basic Control System Diagnostic .......................................................................................................................... 15

3.6 Controller maintenance ......................................................................................................................................... 16

3.7 Optional Remote User Interface ........................................................................................................................... 16

3.8 Embedded Web Interface ..................................................................................................................................... 17

4 MENU STRUCTURE ..................................................................................................................................................... 18

4.1 Main Menu ............................................................................................................................................................ 18

4.2 View/Set Unit ......................................................................................................................................................... 18

4.2.1 Thermostat Ctrl ............................................................................................................................................. 19

D-EOMZC00106- 6 - 3/ 17_0 EN 66

4.2.2 Network Ctrl .................................................................................................................................................. 19

4.2.3 Pumps ........................................................................................................................................................... 19

4.2.4 Condenser .................................................................................................................................................... 20

4.2.5 Evaporator .................................................................................................................................................... 20

4.2.6 Rapid Restart ................................................................................................................................................ 20

4.2.7 Date/Time ..................................................................................................................................................... 20

4.2.8 Scheduler ...................................................................................................................................................... 21

4.2.9 Power Conservation ..................................................................................................................................... 21

4.2.10 Controller IP setup ........................................................................................................................................ 22

4.2.11 Daikin on Site ............................................................................................................................................... 22

4.3 View/S Circuit et ..................................................................................................................................................... 22

4.3.1 Data .............................................................................................................................................................. 23

4.3.2 Compressor .................................................................................................................................................. 23

4.3.3 EXV ............................................................................................................................................................... 24

4.3.4 Variable VR ................................................................................................................................................... 24

4.4 Active Setpoint ...................................................................................................................................................... 24

4.5 Evaporator LWT .................................................................................................................................................... 24

4.6 Condenser LWT .................................................................................................................................................... 24

4.7 Unit Capacity ......................................................................................................................................................... 24

4.8 Unit Mode .............................................................................................................................................................. 25

4.9 Unit Enable (A/C Units only) ................................................................................................................................. 25

4.10 Timers ................................................................................................................................................................... 25

4.11 Alarms ................................................................................................................................................................... 25

4.12 Commission Unit ................................................................................................................................................... 26

4.12.1 Alarm Limits .................................................................................................................................................. 26

4.12.2 Calibrate Sensors ......................................................................................................................................... 26

4.12.2.1 Unit Calibrate Sensors ......................................................................................................................... 26

4.12.2.2 Circuit Calibrate Sensors ..................................................................................................................... 27

4.12.3 Manual Control ............................................................................................................................................. 27

4.12.3.1 Unit ....................................................................................................................................................... 27

4.12.3.2 Circuit #1 (Circuit #2 if present) ........................................................................................................... 28

4.12.4 Scheduled Maintenance ............................................................................................................................... 28

4.13 Software Options (Only for MicroTech ™4) .......................................................................................................... 29

4.13.1 Changing the Password for buying new Software Options .......................................................................... 29

4.13.2 Inserting the Password in a Spare Controller ............................................................................................... 30

4.14 Energy Monitoring (Optional for MicroTech ™4) .................................................................................................. 31

4.15 About this Chiller ................................................................................................................................................... 31

5 WORKING WITH THIS UNIT ........................................................................................................................................ 32

5.1 Unit Setup ............................................................................................................................................................. 32

5.1.1 Control Source .............................................................................................................................................. 32

5.1.2 Available Mode Setting ................................................................................................................................. 32

5.1.3 Temperature Settings ................................................................................................................................... 33

5.1.3.1 LWT Setpoint Setting ........................................................................................................................... 33

5.1.3.2 Thermostat Control Settings ................................................................................................................ 33

5.1.4 Alarm Settings .............................................................................................................................................. 34

5.1.4.1 Pumps .................................................................................................................................................. 35

5.1.5 Power Conservation ..................................................................................................................................... 35

5.1.5.1 Demand Limit ....................................................................................................................................... 35

5.1.5.2 Current Limit (Optional) ........................................................................................................................ 35

5.1.5.3 Setpoint Reset ..................................................................................................................................... 36

5.1.5.4 Setpoint Reset by External 4-20 mA Signal ......................................................................................... 36

5.1.5.5 tpoint Reset by Evaporator Return Temperature Se ............................................................................ 36

5.1.5.6 Soft Load .............................................................................................................................................. 37

5.1.6 Date/Time ..................................................................................................................................................... 37

5.1.6.1 Date, Time and UTC Settings .............................................................................................................. 37

5.2 Unit/Circuit Start-up ............................................................................................................................................... 37