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Air and Water cooled inverter chillers and heat pump

EWAD TZ - EWAD TZ B

EWWD VZ – EWWH VZ

Air and Water cooled inverter chillers

and heat pump

D-EOMZC00106-17EN

Operation Manual

1/85

Air cooled:

 EWAD TZ

 EWAD TZ-B

Water cooled:

 EWWD VZ

 EWWH VZ

Air and Water cooled inverter chillers and heat pump

D-EOMZC00106-17EN

OPERATION MANUAL

Air and Water cooled inverter chillers and heat pump

D-EOMZC00106-17EN

Operation Manual

2/85

EWAD TZ - EWAD TZ B

EWWD VZ – EWWH VZ

Air and Water cooled inverter chillers and

heat pump

TABLE OF CONTENTS

1 SAFETY CONSIDERATIONS ...................................................................................................................... 7

1.1 General ................................................................................................................................................. 7

1.2 Avoid electrocution ................................................................................................................................ 7

1.3 Safety Devices ...................................................................................................................................... 7

1.3.1 General safety devices ................................................................................................................................. 7

1.3.2 Circuit safety devices .................................................................................................................................... 8

1.3.3 Component safety devices ........................................................................................................................... 8

1.4 Available sensors .................................................................................................................................. 9

1.4.1 Pressure transducers .................................................................................................................................... 9

1.4.2 Temperature sensors .................................................................................................................................... 9

1.4.3 Thermistors ................................................................................................................................................... 9

1.4.4 Leak detectors .............................................................................................................................................. 9

1.5 Available Controls ............................................................................................................................... 10

1.5.1 Evaporator pumps ...................................................................................................................................... 10

1.5.2 Condenser pumps (W/C units only) ............................................................................................................ 10

1.5.3 Compressors .............................................................................................................................................. 10

1.5.4 Expansion Valve ......................................................................................................................................... 10

1.5.5 Switchbox Pressurization fan for HFO units (W/C only) .............................................................................. 10

1.6 Customer Terminal Block Connections .............................................................................................. 10

1.6.1 Evaporator Flow Switch .............................................................................................................................. 11

1.6.2 Condenser Flow Switch (W/C units only) .................................................................................................... 11

1.6.3 Double setpoint ........................................................................................................................................... 11

1.6.4 Current limit (optional) ................................................................................................................................ 11

1.6.5 External Fault.............................................................................................................................................. 11

1.6.6 Rapid Restart (optional) .............................................................................................................................. 11

1.6.7 Remote On-Off ........................................................................................................................................... 11

1.6.8 General Alarm............................................................................................................................................. 11

1.6.9 Compressor Status ..................................................................................................................................... 11

1.6.10 Circuit Alarm (optional) ............................................................................................................................... 11

1.6.11 Evaporator Pump Start ............................................................................................................................... 12

1.6.12 Condenser Pump Start (W/C units only) ..................................................................................................... 12

1.6.13 Demand limit ............................................................................................................................................... 12

1.6.14 Setpoint override ......................................................................................................................................... 12

1.6.15 Pump VFD Signal (A/C units only) .............................................................................................................. 12

2 GENERAL DESCRIPTION ........................................................................................................................ 13

2.1 Basic Information ................................................................................................................................ 13

2.2 Abbreviations used ............................................................................................................................. 13

2.3 Controller Operating Limits ................................................................................................................. 13

2.4 Controller Architecture ........................................................................................................................ 14

2.5 Communication Modules .................................................................................................................... 14

3 USING THE CONTROLLER ...................................................................................................................... 15

3.1 General Recommendation .................................................................................................................. 15

3.2 Navigating ........................................................................................................................................... 15

3.3 Passwords .......................................................................................................................................... 16

3.4 Editing ................................................................................................................................................. 16