Daikin EWAD TZ-B user guide manual

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Air and Water cooled inverter chillers and heat pump

EWAD TZ - EWAD TZ B - EWWD VZ Air and Water cooled inverter chillers and heat pump

D-EOMZC00105-17EN Operation Manual

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Air cooled:

 EWAD TZ  EWAD TZ-B

Water cooled:

 EWWD VZ

Air and Water cooled inverter chillers and heat pump

D-EOMZC00105-17EN

OPERATION MANUAL

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EWAD TZ - EWAD TZ B -EWWD 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

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3.5 Basic Control System Diagnostic ........................................................................................................ 17

3.6 Controller maintenance ....................................................................................................................... 18

3.7 Optional Remote User Interface ......................................................................................................... 18

3.8 Embedded Web Interface ................................................................................................................... 19

4 MENU STRUCTURE .................................................................................................................................. 21

4.1 Main Menu .......................................................................................................................................... 21

4.2 View/Set Unit ...................................................................................................................................... 21

4.2.1 Thermostat Ctrl ........................................................................................................................................... 21

4.2.2 Network Ctrl ................................................................................................................................................ 22

4.2.3 Compressor Vfd Setup (A/C Units only) ..................................................................................................... 22

4.2.4 Pumps ........................................................................................................................................................ 22

4.2.5 Condenser (W/C units only) ........................................................................................................................ 23

4.2.6 Press Fan (W/C units only) ......................................................................................................................... 23

4.2.7 Master/Slave ................................................................ ............................................................................... 23

4.2.7.1 Data .................................................................................................................................................... 24

4.2.7.2 Options ............................................................................................................................................... 24

4.2.7.3 Thermostat Ctrl .................................................................................................................................. 25

4.2.7.4 Timers ................................................................................................................................................ 25

4.2.7.5 Standby Chiller ................................................................................................................................... 25

4.2.8 Rapid Restart ................................ ................................ .............................................................................. 25

4.2.9 Date/Time ................................................................................................................................................... 25

4.2.10 Scheduler ................................................................................................................................................... 26

4.2.11 Power Conservation ................................................................................................................................... 26

4.2.12 Controller IP setup ...................................................................................................................................... 27

4.2.13 Daikin on Site.............................................................................................................................................. 27

4.2.14 Menu Password .......................................................................................................................................... 27

4.3 View/Set Circuit ................................................................................................................................... 28

4.3.1 Data ............................................................................................................................................................ 28

4.3.2 Compressor ................................................................................................................................................ 29

4.3.3 Condenser (A/C only) ................................................................................................................................. 29

4.3.4 EXV ............................................................................................................................................................ 30

4.3.5 Economizer (A/C only) ................................................................................................................................ 30

4.3.6 Settings (A/C units only) ............................................................................................................................. 30

4.3.7 Variable VR................................................................................................................................................. 30

4.4 Active Setpoint .................................................................................................................................... 30

4.5 Evaporator LWT .................................................................................................................................. 31

4.6 Condenser LWT (W/C Units only) ...................................................................................................... 31

4.7 Unit Capacity ....................................................................................................................................... 31

4.8 Unit Mode ............................................................................................................................................ 31

4.9 Unit Enable (A/C Units only) ............................................................................................................... 32

4.10 Timers ................................................................................................................................................. 32

4.11 Alarms ................................................................................................................................................. 32

4.12 Commission Unit ................................................................................................................................. 32

4.12.1 Alarm Limits ................................................................................................................................................ 32

4.12.2 Calibrate Sensors ....................................................................................................................................... 33

4.12.2.1 Unit Calibrate Sensors ....................................................................................................................... 33

4.12.2.2 Circuit Calibrate Sensors .................................................................................................................... 33

4.12.3 Manual Control ........................................................................................................................................... 34

4.12.3.1 Unit ..................................................................................................................................................... 34

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4.12.3.2 Circuit #1 (Circuit #2 if present) .......................................................................................................... 35

4.12.4 Scheduled Maintenance ............................................................................................................................. 36

4.13 About this Chiller ................................................................................................................................. 36

5 WORKING WITH THIS UNIT ..................................................................................................................... 37

5.1 Unit Setup ........................................................................................................................................... 37

5.1.1 Control Source ............................................................................................................................................ 37

5.1.2 Available Mode Setting ............................................................................................................................... 37

5.1.3 Temperature Settings ................................................................................................................................. 38

5.1.3.1 LWT Setpoint Setting ......................................................................................................................... 38

5.1.3.2 Thermostat Control Settings ............................................................................................................... 39

5.1.4 Alarm Settings ............................................................................................................................................ 40

5.1.4.1 Pumps ................................................................................................................................................ 40

5.1.5 Power Conservation ................................................................................................................................... 40

5.1.5.1 Demand Limit ..................................................................................................................................... 40

5.1.5.2 Current Limit (Optional) ...................................................................................................................... 41

5.1.5.3 Setpoint Reset .................................................................................................................................... 41

5.1.5.4 Setpoint Reset by OAT Reset (A/C units only) ................................................................................... 41

5.1.5.5 Setpoint Reset by External 4-20 mA Signal ....................................................................................... 42

5.1.5.6 Setpoint Reset by Evaporator Return Temperature ........................................................................... 42

5.1.5.7 Soft Load ............................................................................................................................................ 42

5.1.6 Date/Time ................................................................................................................................................... 43

5.1.6.1 Date,Time and UTC Settings ............................................................................................................. 43

5.1.6.2 Quiet Mode Scheduling (A/C units only) ............................................................................................. 43

5.1.7 Scheduler ................................................................................................................................................... 43

5.2 Unit/Circuit Start-up ............................................................................................................................. 43

5.2.1 Unit Status .................................................................................................................................................. 43

5.2.2 Prepare the unit to start .............................................................................................................................. 44

5.2.2.1 Unit Switch Enable (A/C units only) .................................................................................................... 44

5.2.2.2 Unit Switch Enable (W/C units only) ................................................................................................... 44

5.2.2.3 Keypad Enable ................................................................................................................................... 45

5.2.2.1 BMS Enable ....................................................................................................................................... 45

5.2.3 Unit Start sequence .................................................................................................................................... 45

5.2.4 Circuit Status .............................................................................................................................................. 45

5.2.5 Circuits start sequence ............................................................................................................................... 46

5.2.6 High Water Temperature Limit (A/C units only) .......................................................................................... 47

5.2.7 Low Evaporating Pressure .......................................................................................................................... 47

5.2.8 High Condensing Pressure ......................................................................................................................... 48

5.2.9 High Vfd Current ......................................................................................................................................... 48

5.2.10 High Discharge Temperature ...................................................................................................................... 48

5.3 Condensation Control (A/C units only) ............................................................................................... 49

5.3.1 Fan Settings (A/C units only) ...................................................................................................................... 49

5.3.1.1 Fan VFD Settings ............................................................................................................................... 49

5.4 Condensation Control (W/C units only) .............................................................................................. 50

5.5 EXV Control ........................................................................................................................................ 51

5.6 Economizer Control (A/C units only) ................................................................................................... 51

5.7 Liquid Injection Control ....................................................................................................................... 52

5.8 Variable Volume Ratio Control ........................................................................................................... 52

6 ALARMS AND TROUBLESHOOTING ...................................................................................................... 53

6.1 Unit Alerts ........................................................................................................................................... 54

6.1.1 Bad Current Limit Input ............................................................................................................................... 54

6.1.2 Bad Demand Limit Input ............................................................................................................................. 54

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6.1.3 Bad Leaving Water Temperature Reset Input............................................................................................. 54

6.1.4 Condenser Pump #1 Failure (W/C units only)............................................................................................. 55

6.1.5 Condenser Pump #2 Failure (W/C units only)............................................................................................. 55

6.1.6 Energy Meter Communication Fail .............................................................................................................. 55

6.1.7 Evaporator Pump #1 Failure ....................................................................................................................... 56

6.1.8 Evaporator Pump #2 Failure ....................................................................................................................... 56

6.1.9 External Event ............................................................................................................................................ 56

6.1.10 Fan Alarm Module Communication Fail (A/C units only) ............................................................................ 57

6.1.11 Heat Recovery Entering Water Temperature sensor fault (A/C units only) ................................................. 57

6.1.12 Heat Recovery Leaving Water Temperature sensor fault (A/C units only) .................................................. 57

6.1.13 Heat Recovery Water Temperatures inverted (A/C units only) ................................................................... 58

6.1.14 Rapid Recovery Module Communication Fail ............................................................................................. 58

6.1.15 Switch Box Temperature sensor fault (A/C units only) ................................................................................ 58

6.2 Unit Pumpdown Stop Alarms .............................................................................................................. 59

6.2.1 Condenser Entering Water Temperature (EWT) sensor fault ..................................................................... 59

6.2.2 Condenser Leaving Water Temperature (LWT) sensor fault ...................................................................... 59

6.2.3 Evaporator Entering Water Temperature (EWT) sensor fault ..................................................................... 59

6.2.4 Evaporator Water Temperatures inverted ................................................................................................... 60

6.2.5 Outside Air Temperature (OAT) Lockout (A/C units only) ........................................................................... 60

6.2.6 Outside Air Temperature sensor fault alarm (A/C units only) ...................................................................... 60

6.3 Unit Rapid Stop Alarms....................................................................................................................... 61

6.3.1 Condenser Water Freeze alarm (W/C units only) ....................................................................................... 61

6.3.2 Condenser Water Flow Loss alarm (W/C units only) .................................................................................. 61

6.3.3 Emergency Stop ......................................................................................................................................... 61

6.3.4 Evaporator Flow Loss alarm ...................................................................................................................... 62

6.3.5 Evaporator Leaving Water Temperature (LWT) sensor fault ...................................................................... 62

6.3.6 Evaporator Water Freeze alarm .................................................................................................................. 62

6.3.7 External alarm............................................................................................................................................. 63

6.3.8 Gas Leakage Alarm (W/C units only) .......................................................................................................... 63

6.3.9 Heat Recovery Water Freeze Protect alarm (A/C units only) ...................................................................... 63

6.3.10 OptionCtrlrCommFail (A/C units only) ......................................................................................................... 64

6.3.11 Power Fault (only for A/C units with the UPS option) .................................................................................. 64

6.3.12 PVM alarm (A/C units only)......................................................................................................................... 64

6.4 Circuit Alerts ........................................................................................................................................ 65

6.4.1 Economizer Pressure Sensor fault (A/C units only) .................................................................................... 65

6.4.2 Economizer Temperature Sensor fault (A/C units only) .............................................................................. 65

6.4.3 Failed Pumpdown ....................................................................................................................................... 66

6.4.4 Fan Fault (A/C units only) ........................................................................................................................... 66

6.4.5 Gas Leakage Sensor fault (A/C units only) ................................................................................................. 66

6.4.6 CxCmp1 MaintCode01 (A/C units only) ...................................................................................................... 67

6.4.7 CxCmp1 MaintCode02 (A/C units only) ...................................................................................................... 67

6.4.8 Power Loss (A/C units only)........................................................................................................................ 67

6.5 Circuit Pumpdown Stop Alarms .......................................................................................................... 68

6.5.1 Discharge Temperature Sensor fault .......................................................................................................... 68

6.5.2 Gas Leakage fault (A/C units only) ............................................................................................................. 68

6.5.3 High Compressor Vfd Temperature fault (A/C units only) ........................................................................... 69

6.5.4 Liquid Temperature Sensor fault (W/C units only) ...................................................................................... 69

6.5.5 Low Compressor Vfd Temperature fault (A/C units only) ............................................................................ 69

6.5.6 Low Oil Level fault (W/C units only) ............................................................................................................ 70

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6.5.7 Low Discharge Superheat fault ................................................................................................................... 70

6.5.8 Oil Pressure Sensor fault ............................................................................................................................ 70

6.5.9 Suction Temperature Sensor fault .............................................................................................................. 71

6.6 Circuit Rapid Stop Alarms ................................................................................................................... 71

6.6.1 Compressor Extension Communication Error (W/C units only) .................................................................. 71

6.6.2 EXV Driver Extension Communication Error (W/C units only) .................................................................... 71

6.6.3 Compressor VFD Fault ............................................................................................................................... 72

6.6.4 Compressor VFD OverTemp (A/C units only) ............................................................................................. 72

6.6.5 Condensing Pressure sensor fault .............................................................................................................. 72

6.6.6 Economizer EXV Driver Error (A/C unit only).............................................................................................. 73

6.6.7 Economizer EXV Motor Not Connected (A/C unit only) .............................................................................. 73

6.6.8 Evaporating Pressure sensor fault .............................................................................................................. 73

6.6.9 EXV Driver Error (A/C units only) ................................................................................................................ 74

6.6.10 EXV Motor Not Connected (TZ B units only) .............................................................................................. 74

6.6.11 Fail Start Low Pressure .............................................................................................................................. 74

6.6.12 Fan VFD Over Current (A/C units only) ...................................................................................................... 75

6.6.13 High Discharge Temperature Alarm ........................................................................................................... 75

6.6.14 High Motor Current Alarm ........................................................................................................................... 75

6.6.15 High Motor Temperature Alarm .................................................................................................................. 76

6.6.16 High Oil Pressure Differential Alarm ........................................................................................................... 76

6.6.17 High Pressure alarm ................................................................................................................................... 76

6.6.18 Low Pressure alarm .................................................................................................................................... 77

6.6.19 Low Pressure Ratio Alarm .......................................................................................................................... 78

6.6.20 Maximum Number of Restart Alarm (A/C units only) .................................................................................. 78

6.6.21 Mechanical High Pressure Alarm ................................................................................................................ 79

6.6.22 Mechanical Low Pressure Alarm (W/C units only) ...................................................................................... 79

6.6.23 No Pressure At Start Alarm ........................................................................................................................ 80

6.6.24 No Pressure Change At Start Alarm ........................................................................................................... 80

6.6.25 Overvoltage Alarm ...................................................................................................................................... 80

6.6.26 Undervoltage Alarm .................................................................................................................................... 81

6.6.27 VFD Communication Failure ....................................................................................................................... 81

7 OPTIONS .................................................................................................................................................... 82

7.1 Total Heat Recovery (Optional – A/C units only) ................................................................................ 82

7.2 Energy Meter including Current Limit (Optional) ................................................................................ 82

7.3 Rapid Restart (Optional) ..................................................................................................................... 83

7.4 Inverter Pump Kit (Optional) ............................................................................................................... 83

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RISK OF ELECTROCUTION: Even when the main circuit breaker or isolator is switched off, certain circuits may still be energized, since they may be connected to a separate power source.

RISK OF BURNS: Electrical currents cause components to get hot either temporarily or permanently. Handle power cable, electrical cables and conduits, terminal box covers and motor frames with great care.

ATTENTION: In accordance with the operating conditions the fans can be cleaned periodically. A fan can start at any time, even if the unit has been shut down.

1 SAFETY CONSIDERATIONS

1.1 General

Installation, start-up and servicing of equipment can be hazardous if certain factors particular to the installation are not considered: operating pressures, presence of electrical components and voltages and the installation site (elevated plinths and built-up up structures). Only properly qualified installation engineers and highly qualified installers and technicians, fully trained for the product, are authorized to install and start-up the equipment safely.

During all servicing operations, all instructions and recommendations, which appear in the installation and service instructions for the product, as well as on tags and labels fixed to the equipment and components and accompanying parts supplied separately, must be read, understood and followed.

Apply all standard safety codes and practices. Wear safety glasses and gloves. Use the proper tools to move heavy objects. Move units carefully and set them down gently.

1.2 Avoid electrocution

Only personnel qualified in accordance with IEC (International Electrotechnical Commission) recommendations may be permitted access to electrical components. It is particularly recommended that all sources of electricity to the unit be shut off before any work is begun. Shut off main power supply at the main circuit breaker or isolator.

IMPORTANT: This equipment uses and emits electromagnetic signals. Tests have shown that the equipment conforms to all applicable codes with respect to electromagnetic compatibility.

1.3 Safety Devices

Each unit is equipped with safety devices of three different kinds:

1.3.1 General safety devices

Safeties of this level of severity will shut down all the circuits and stop the entire unit. When a general safety device will occur a manual intervention on the unit will be required in order to re-establish the normal operability of the machine. There are exceptions to this general rule in case of alarms linked to temporary abnormal conditions.

 Emergency Stop

A push button is placed on a door of the unit electrical panel. The button is highlighted by a red color in yellow background. A manual pressure of the emergency stop button stops all loads from rotating, thus preventing any accident which may occur. An alarm is also generated by the Unit Controller. Releasing the emergency stop button enables the unit, which may be restarted only after the alarm has been cleared on the controller.

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The emergency stop causes all motors to stop, but does not switch off power to the unit. Do not service or operate on the unit without having switched off the main switch.

Do not operate on a faulty fan before the main switch has been shut off. Overtemperature protection is autoreset, therefore a fan may restart automatically if temperature conditions allow it.

Direct intervention on the power supply can cause electrocution, burns or even death. This action must be performed only by trained persons.

1.3.2 Circuit safety devices

Safety of this level of severity will shut down the circuit they protect. The remaining circuits will keep running.

1.3.3 Component safety devices

Safety of this level of severity will shut down a component against abnormal running condition that could create permanent damages to it. An overview of the protecting devices is listed below:

 Overcurrent/Overload Protections

Overcurrent/overload devices protect electrical motors used on compressors, fans and pumps in case of overload or short circuit. In case of inverter-driven motors, overload and overcurrent protection is integrated in the electronic drives. A further protection from short circuit is accomplished by fuses or circuit breakers installed upstream each load or group of loads.

 Overtemperature Protections

Compressor and fan electrical motors are also protected from overheating by thermistors immersed into motor windings. Should the winding temperature exceed a fixed threshold, the thermistors will trip and cause the motor to stop. High Temperature Alarm is recorded in the Unit Controller only in case of compressors. Alarm must be reset from the controller.

 Phase reversal, under/over voltage, ground fault protections

When one of those alarms occurs the unit is immediately stopped or even inhibited to start. The alarms clear automatically once the problem is fixed. This auto clear logic allows the unit to automatically recover in case of temporary conditions where the supply voltage reaches the upper or lower limit set on the protection device. In the other two cases a manual intervention on the unit will be required in order to solve the problem. In case of a phase reversal alarm two phases requires to be inverted.

In the event of a power supply outage, the unit will restart automatically without the need for an external command. However, any faults active when the supply is interrupted are saved and may in certain cases prevent a circuit or unit from restarting.

 Flowswitch

The unit must be protected by a flowswitch. The flowswitch will stop the unit when the water flow becomes lower than the minimum allowed flow. When the water flow is restored the flow protection resets automatically. Exception is when the flowswitch opens with at least one compressor running, in this case the alarm shall be cleared manually.

 Freezing protection

Antifreeze protection prevents the water to freeze in the evaporator. It is automatically activated when the water temperature (entering or leaving) at the evaporator drops below the antifreeze limit. In freeze condition if the unit is in standby the evaporator pump will be activated to prevent freezing of the evaporator. If the freeze condition will activate when the unit is running all the unit will shut down in alarm while the pump will keep running. Alarm will automatically clear when the freeze condition will clear.

 Low pressure protection

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If the circuit operates with a suction pressure lower than an adjustable limit for a certain time the circuit safety logic will shut down the circuit and generate an alarm. The alarm requires a manual action on the Unit Controller to be reset. Reset will take effect only if the suction pressure is no longer lower that the safety limit.

 High Pressure Protection

If the discharge pressure becomes too high and exceeds a limit which is linked with the operational envelop of the compressor the circuit safety logic will try to prevent the alarm or, if the corrective actions have no effect, it will shut down the circuit before the Mechanical High Pressure switch will open. This alarm required a manual action on the Unit Controller to be reset.

 Mechanical High Pressure Switch

Each circuit is equipped with at least one high pressure switch which tries to prevent the relief safety valve to open. When the discharge pressure becomes too high the Mechanical High Pressure switch will open and immediately stop the compressor cutting the power supply to the auxiliary relay. The alarm can be cleared as soon as the discharge pressure becomes normal again. The alarm must be reset on the switch itself and on the Unit Controller. The triggering pressure value cannot be changed.

 Relief Safety Valve

If the pressure becomes too high in the refrigerant circuit, the relief valve will open to limit the maximum pressure. If this happens switch off immediately the machine and contact your local service organization.

 Inverter fault

Each compressor can be equipped with its own inverter (integrated or external). The inverter can automatically monitor its status and inform the Unit Controller in case of faults or pre-alarm conditions. If this happen the Unit Controller will limit the compressor operation or eventually switch off the circuit in alarm. A manual action on the controller will be needed in order to clear the alarm.

1.4 Available sensors

1.4.1 Pressure transducers

Two types of electronic sensors are used to measure suction, discharge and oil pressure on each circuit. The range of each sensor is clearly indicated on the sensor casing. Discharge and oil pressures are monitored using a sensor of the same range.

1.4.2 Temperature sensors

The evaporator water sensors are installed in the entering and leaving side. An outdoor temperature sensor is mounted inside the chiller. Additionally each circuit installs a suction and discharge temperature sensors to monitor and control the superheated refrigerant temperatures.

On refrigerant-cooled inverters additional sensors immersed into the cooling plate measure the temperature of the drives.

1.4.3 Thermistors

Each compressor is equipped with PTC thermistors which are immersed into motor windings for motor protection. Thermistors trip to a high value in case the motor temperature reaches a hazardous temperature.

1.4.4 Leak detectors

As an option the unit can be equipped with leak detectors to sense the air in the compressor cabin and being able to identify a refrigerant leakage in that volume.

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Description

Terminals

EWAD

Terminals

EWAD

TZ B

Terminals

EWWD

Notes

Evaporator Flow Switch (mandatory)

708, 724

24 Vdc digital input

Condenser Flow Switch

- - 888, 890

24 Vdc digital input

Double setpoint

703, 728

703,728

703, 728

24 Vdc digital input

Current limit enable

884, 885

885, 891

24 Vdc digital input

External Fault

881,884

881, 884

542, 501

24 Vdc digital input

Rapid Restart Enable (optional)

764, 765

24 Vdc digital input

Back-up chiller (optional)

764, 763

- - 24 Vdc digital input

LOC/BMS selection (optional)

894, 895

881-1, 834

894, 895

24 Vdc digital input

On-Off Remote

540, 541

703, 749

230 Vac digital input

Heat/Cool Remote

- - 892, 893

Leak Detector Output

- - 552, 553

General Alarm

525, 526

NO digital output (24…230 Vac ext supply)

Compressor #1 status

512, 513

NO digital output (24…230 Vac ext supply)

Compressor #2 status

514, 515

NO digital output (24…230 Vac ext supply)

Alarm Circuit #1 (optional)

560, 561

892, 896

564, 565

NO digital output (24…230 Vac ext supply)

Alarm Circuit #2 (optional)

560, 562

894, 899

565, 566

NO digital output (24…230 Vac ext supply)

Evaporator Pump #1 start

806, 805

501, 530

527, 528

NO digital output (24 Vdc internal supply)

Evaporator Pump #2 start

806, 807

501, 531

559, 560

NO digital output (24 Vdc internal supply)

Condenser Pump #1 start

- - 550, 551

NO digital output (24 Vdc internal supply)

Condenser Pump #2 start

- - 559, 562

NO digital output (24 Vdc internal supply)

Demand Limit

888, 889

887, 889

4-20 mA analog input

Current Limit (optional)

886, 890

887, 886

4-20 mA analog input

Setpoint Override

886, 887

890, 886

886, 887

4-20 mA analog input

Pump VFD Signal (optional)

882, 883

- -

1.5 Available Controls

1.5.1 Evaporator pumps

The controller can regulate one or two evaporator pumps and takes care of automatic change-over between pumps. It’s also possible to prioritize the pumps and temporarily disable one of the two. The controller is also able to control the pump speeds if the pumps are equipped with inverters.

1.5.2 Condenser pumps (W/C units only)

The controller can regulate one or two condenser pumps and takes care of automatic change-over between pumps. It’s also possible to prioritize the pumps and temporarily disable one of the two.

1.5.3 Compressors

The controller can regulate one or two compressors installed on one or two independent refrigerant circuit (one compressor per circuit). All the safeties of each compressor will be managed by the controller. Embedded inverter safeties are handled by the inverter onboard electronic and only notified to the UC.

1.5.4 Expansion Valve

The controller can regulate an electronic expansion valve per each refrigerant circuit. Microtech® III embedded logic will always guarantee the best operation for the refrigerant circuit.

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

In case of water cooled units which are installed in plant rooms it’s required to pressurize the switchbox to avoid refrigerant accumulation that could lead to dangerous operations of the unit. To avoid this a pressurization fan will maintain a constant air circulation inside the switchbox. This fan will be always running when the internal temperature will exceed 23°C. Any drop in the delta pressure between the inside and the ambient will generate a stop of the unit to re-establish a safe condition for the users.

1.6 Customer Terminal Block Connections

The contacts below are available at the user’s terminal block referred as MC24 or MC230 in the wiring diagram.

The following table summarizes the connections at the user’s terminal block.

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Operating the unit by-passing the flow switch input or without an appropriate flow switch may damage the evaporator due to freezing. Operation of the flow switch must be checked prior to start up the unit.

1.6.1 Evaporator Flow Switch

Although the flow switch is offered as an optional, it is mandatory to install one and connect it to the digital input terminals in order to enable chiller operation only when a minimum flow is sensed.

1.6.2 Condenser Flow Switch (W/C units only)

Condenser flow switch is offered as an option but it’s not mandatory to connect it to the digital input terminals.

This input can be eventually closed by a jumper even if for a more reliable use it’s suggested to mount it. If not

installed, other protection will activate in order to protect the unit.

1.6.3 Double setpoint

This contact can be used to switch between two different LWT setpoints and, depending on the application, between different modes of operation.

Ice operation must be selected in case of ice storage application. In this case the UC will run the chiller in on/off mode, switching all the chiller off as soon as the setpoint is reached. In this case the unit will run to full capacity and then will switch off applying an ice delay different chiller starts.

1.6.4 Current limit (optional)

This optional feature enables a capacity control of the unit in order to limit the input current. The current limit feature is included in the Energy Meter option. The limiting signal will be compared with a limiting value set on the HMI. By default the current limit setpoint is selected through the HMI; an external 4-20 mA signal can be enabled to allow a remotely changeable setpoint.

1.6.5 External Fault

This contact is available to report to the UC a fault or a warning from an external device. It could be an alarm coming from an external pump to inform the UC of the fault. This input can be configured as a fault (unit stop) or a warning (displayed on the HMI without any action on the chiller).

1.6.6 Rapid Restart (optional)

Purpose of the rapid restart feature is to let the unit restart in the shortest possible time after a power failure, and then recover in the shortest possible time (maintaining the reliability level of the normal operations) the capacity it had before the power failure. The rapid restart is enabled by the enable switch.

1.6.7 Remote On-Off

This unit can be started through a remote enable contact. The Q0 switch must be selected to “Remote”.

1.6.8 General Alarm

In case of a unit alarm, this output is closed thus indicating a fault condition to an externally connected BMS.

1.6.9 Compressor Status

The digital output is closed when the related circuit is in run state.

1.6.10 Circuit Alarm (optional)

This option is included with the “Rapid Restart” option. The related digital contact is closed in case of alarm on

a circuit.

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1.6.11 Evaporator Pump Start

A 24 Vdc digital output (with internal supply) is enabled when a pump (#1 or #2) is required to start. The output can be used to start an external pump (either at fixed or variable speed). The output requires an external input or relay with less than 20 mA excitation current.

1.6.12 Condenser Pump Start (W/C units only)

A digital output is enabled when a pump (#1 or #2) is required to start. A pump will be required to start when a compressor will be called to start.

1.6.13 Demand limit

This optional function can be used to limit the unit capacity percentage to a changeable limit value. This limitation cannot be directly linked to a corresponding limitation of the unit current (50% demand limit can differ from 50% of the unit FLA).

The demand limit signal can be changed continuously between 4 and 20 mA. The Microtech III will convert this signal into a unit capacity limitation changing between minimum capacity and full capacity with a linear relationship. A signal between 0 and 4mA will correspond to a full unit capacity, in this way if nothing is connected to this input no limitation will be applied. The maximum limitation will never force a unit shutdown.

1.6.14 Setpoint override

This input allows to apply an offset on the Active Setpoint to adjust the operating point of the ELWT. This input can be used to maximize the comfort.

1.6.15 Pump VFD Signal (A/C units only)

The “Pump VFD Signal” terminals are available for pump inverter kit option when factory wired speed reference

is required. These terminals are placed inside the main electrical panel. For more information about this option see 7.4.

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A/C

Air Cooled

CEWT

Condenser Entering Water Temperature

CLWT

Condenser Leaving Water Temperature

Condensing Pressure

CSRT

Condensing Saturated Refrigerant Temperature

DSH

Discharge Superheat

Discharge Temperature

E/M

Energy Meter Module

EEWT

Evaporator Entering Water Temperature

ELWT

Evaporator Leaving Water Temperature

Evaporating Pressure

ESRT

Evaporating Saturated Refrigerant Temperature

EXV

Electronic Expansion Valve

HMI

Human Machine Interface

MOP

Maximum operating pressure

SSH

Suction SuperHeat

Suction Temperature

Unit controller (Microtech III)

W/C

Water Cooled

2 GENERAL DESCRIPTION

2.1 Basic Information

Microtech® III is a system for controlling single or dual-circuit air/water-cooled liquid chillers. Microtech® III controls compressor start-up necessary to maintain the desired heat exchanger leaving water temperature. In each unit mode it controls the operation of the condensing devices to maintain the proper condensation process in each circuit.

Safety devices are constantly monitored by Microtech® III to ensure their safe operation. Microtech® III also gives access to a Test routine covering all inputs and outputs. All Microtech® III controls can work in accordance with three independent modes:

 Local mode: the machine is controlled by commands from the user interface.  Remote mode: the machine is controlled by remote contacts (volt-free contacts).

Network mode: the machine is controlled by commands from a BAS system. In this case, a data communication cable is used to connect the unit to the BAS.

When the Microtech® III system operates autonomously (Local or Remote mode) it retains all of its own control capabilities but does not offer any of the features of the Network mode. In this case monitoring of the unit operational data is still allowed.

2.2 Abbreviations used

In this manual, the refrigeration circuits are called circuit #1 and circuit #2. The compressor in circuit #1 is labelled Cmp1. The other in circuit #2 is labelled Cmp2. The following abbreviations are used:

2.3 Controller Operating Limits

Operation (IEC 721-3-3):

 Temperature -40...+70 °C  Restriction LCD -20… +60 °C  Restriction Process-Bus -25….+70 °C  Humidity < 90 % r.h (no condensation)  Air pressure min. 700 hPa, corresponding to max. 3,000 m above sea level

Transport (IEC 721-3-2):

 Temperature -40...+70 °C  Humidity < 95 % r.h (no condensation)

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Controller/ Extension Module

Siemens Part Number

Address

Usage EWAD TZ

EWAD TZ B

EWWD-VZ

Main Controller

POL687.70/MCQ

POL687.00/MCQ

n/a

Used on all configurations

Extension Module

- - POL965.00/MCQ

Used on all configurations

EEXV Module 1

POL94U.00/MCQ

POL98U.00/MCQ

POL94U.00/MCQ

Used on all configurations

EEXV Module 2

POL94U.00/MCQ

POL98U.00/MCQ

- 4 Used when configured for 2 circuits

Extension Module

- - POL965.00/MCQ

Used when configured for 2 circuits

EEXV Module 2

- - POL94U.00/MCQ

Used when configured for 2 circuits

Extension Module

POL965.00/MCQ

- - 5

Used on all configurations

Rapid Restart Module

POL945.00/MCQ

Used with Rapid Restart option

HFO Module

- - POL945.00/MCQ

Used with HFO on W/C units

CAUTION: Maintain the correct polarity when connecting the power supply to the boards, otherwise the peripheral bus communication will not operate and the boards may be damaged.

Module

Siemens Part Number

Usage

BacNet/IP

POL908.00/MCQ

Optional

Lon

POL906.00/MCQ

Optional

Modbus

POL902.00/MCQ

Optional

BACnet/MSTP

POL904.00/MCQ

Optional

 Air pressure min. 260 hPa, corresponding to max. 10,000 m above sea level.

2.4 Controller Architecture

The overall controller architecture is the following:

 One MicroTech III main controller  I/O extensions as needed depending on the configuration of the unit  Communications interface(s) as selected  Peripheral Bus is used to connect I/O extensions to the main controller.

All boards are supplied from a common 24 Vac source. Extension boards can be directly powered by the Unit Controller. All boards can be also supplied by a 24Vdc source.

2.5 Communication Modules

Any of the following modules can be connected directly to the left side of the main controller to allow a BAS or other remote interface to function. Up to three can be connected to the controller at a time. The controller should automatically detect and configure itself for new modules after booting up. Removing modules from the unit will require manually changing the configuration.

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

Alarm status (from any page it links with the page with alarm list, alarm log and alarm snapshot if available)



Back to Main Page



Back to the previous level (it can be the Main Page)

M a i n M e n u 1 /

E n t e r P a s s w o r d  U n i t S t a t u s =

O f f : U n i t S W

A c t i v e S e t p t = 7 . 0 °

3 USING THE CONTROLLER

The control system consists of a unit controller (UC) equipped with a set of extension modules that implement additional features. All boards communicate via an internal peripheral bus with the UC. The Microtech III continuously manages the information received from the various pressure and temperature probes installed on the compressors and communicated to the unit .The UC incorporates a program that controls the unit.

The standard HMI consists of an inbuilt display (A) with 3 buttons (B) and a push’n’roll control (C).

The keypad/display (A) consists of a 5-line by 22 character display. The function of the three buttons (B) is described below:

The push’n’roll command (C) is used to scroll between the different menu pages, settings and data available on the HMI for the active password level. Rotating the wheel allows to navigate between lines on a screen (page) and to increase and decrease changeable values when editing. Pushing the wheel acts as an Enter Button and will jump from a link to the next set of parameters.

3.1 General Recommendation

Before switching on the unit read the following recommendations:

 When all the operations and all the settings have been carried out, close all the switchbox panels  The switchbox panels can only be opened by trained personnel  When the UC requires to be accessed frequently the installation of a remote interface is strongly

recommended

 Evaporator, compressors and related inverters are protected from freezing by electrical heaters. These

heaters are supplied through unit main supply and temperature controlled by thermostat or by the unit controller. Also the LCD display of the unit controller may be damaged by extremely low temperatures. For this reason, it is strongly recommended to never power off the unit during winter, especially in cold climates.

3.2 Navigating

When power is applied to the control circuit, the controller screen will be active and display the Home screen, which can also be accessed by pressing the Menu Button. The navigating wheel is the only navigating device necessary, although the MENU, ALARM, and BACK buttons can provide shortcuts as explained previously.

An example of the HMI screens is shown in the following picture.

A bell ringing in the top right corner will indicate an active alarm. If the bell doesn’t move it means that the alarm has been acknowledged but not cleared because the alarm condition hasn’t been removed. A LED will also indicate where the alarm is located between the unit or circuits.

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M a i n M e n u 1 /



E n t e r P a s s w o r d



U n i t S t a t u s = O f f : U n i t S W

A c t i v e S e t p t = 7 . 0 °

E n t e r P a s s w o r d 2 /

E n t e r P W * * * *

USER

5321

MAINTENANCE

2526

E n t e r P a s s w o r d 2 / 2

E n t e r P W 5 * *

The active item is highlighted in contrast, in this example the item highlighted in Main Menu is a link to another

page. By pressing the push’n’roll, the HMI will jump to a different page. In this case the HMI will jump to the

Enter Password page.

3.3 Passwords

The HMI structure is based on access levels that means that each password will disclose all the settings and parameters allowed to that password level. Basic informations about the status including the active alarm list, active setpoint and controlled water temperature can be accessed without the need to enter the password. The user UC handles two level of passwords:

The following information will cover all data and settings accessible with the maintenance password. User password will disclose a subset of the settings explained in chapter 4.

In the Enter Password screen, the line with the password field will be highlighted to indicate that the field on the right can be changed. This represents a setpoint for the controller. Pressing the push’n’roll the individual field will be highlighted to allow an easy introduction of the numeric password. By changing all fields, the 4 digits password will be entered and, if correct, the additional settings available with that password level will be disclosed.

The password will time out after 10 minutes and is cancelled if a new password is entered or the control powers down. Entering an invalid password has the same effect as continuing without a password.

Once a valid password has been entered, the controller allows further changes and access without requiring the user to enter a password until either the password timer expires or a different password is entered. The default value for this password timer is 10 minutes. It is changeable from 3 to 30 minutes via the Timer Settings menu in the Extended Menus.

3.4 Editing

The Editing Mode is entered by pressing the navigation wheel while the cursor is pointing to a line containing an editable field. Once in the edit mode pressing the wheel again causes the editable field to be highlighted. Turning the wheel clockwise while the editable field is highlighted causes the value to be increased. Turning the wheel counter-clockwise while the editable field is highlighted causes the value to be decreased. The faster the wheel is turned, the faster the value is increased or decreased. Pressing the wheel again cause the new value to be saved and the keypad/display to leave the edit mode and return to the navigation mode.

A parameter with an “R” is read only; it is giving a value or description of a condition. An “R/W indicates a read

and/or write opportunity; a value can be read or changed (providing the proper password has been entered). Example 1: Check Status, for example -is the unit being controlled locally or by an external network? We are

looking for the Unit Control Source Since this a unit status parameter, start at Main Menu and select View/Set Unit and press the wheel to jump to the next set of menus. There will be an arrow at the right side of the box,

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BSP LED

Mode

Solid Green

Application running

Solid Yellow

Application loaded but not running (*) or BSP Upgrade mode active

Solid Red

Hardware Error (*)

Flashing Green

BSP startup phase. The controller needs time for starting.

Flashing Yellow

Application not loaded (*)

Flashing Yellow/Red

Fail safe mode (in case that the BSP upgrade was interrupted)

Flashing Red

BSP Error (software error*)

Flashing Red/Green

Application/BSP update or inizialization

BSP LED

Mode

BUS LED

Mode

Solid Green

BSP running

Solid Green

Communication running, I/O working

Solid Red

Hardware Error (*)

Solid Red

Communication down (*)

Flashing Red

BSP Error (*)

Solid Yellow

Communication running but parameter from the application wrong or missing, or uncorrect factory calibration

Flashing Red/Green

BSP upgrade mode

BSP LED

Mode

Solid Green

BPS running, communication with controller

Solid Yellow

BSP running, no communication with controller (*)

Solid Red

Hardware Error (*)

Flashing Red

BSP Error (*)

Flashing Red/Green

Application/BSP update

indicating that a jump to the next level is required. Press the wheel to execute the jump. You will arrive at the Status/ Settings link. There is an arrow indicating that this line is a link to a further menu. Press the wheel again to jump to the next menu, Unit Status/Settings. Rotate the wheel to scroll down to Control Source and read the result.

Example 2: Change a Set point, the chilled water set point for example. This parameter is designated as Cool LWT Set point 1 and is a unit set parameter. From the Main Menu select View/Set Unit. The arrow indicated that this is link to a further menu. Press the wheel and jump to the next menu View/Set Unit and use the wheel to scroll down to Temperatures. This again has an arrow and is a link to a further menu. Press the wheel and jump to the Temperatures menu, which contains six lines of temperatures set points. Scroll down to Cool LWT 1 and press the wheel to jump to the item change page. Rotate the wheel to adjust the set point to the desired value. When this is done press the wheel again to confirm the new value. With the Back button it will be possible to jump back to the Temperatures menu where the new value will be displayed.

Example 3: Clear an Alarm. The presence of a new alarm is indicated with a Bell ringing on the top right of the display. If the Bell is frozen one or more alarm had been acknowledged but are still active. To view the Alarm menu from the Main Menu scroll down to the Alarms line or simply press the Alarm button on the display. Note the arrow indicating this line is a link. Press the wheel to jump to the next menu Alarms; there are two lines here: Alarm Active and Alarm Log. Alarms are cleared from the Active Alarm link. Press the wheel to jump to the next screen. When the Active Alarm list is entered scroll to the item AlmClr which is set to off by default. Change this value to on to acknowledge the alarms. If the alarms can be cleared then the alarm counter will display 0 otherwise it will display the number of alarm still active. When the alarms are acknowledged the Bell on the top right of the display will stop to ring if some of the alarms are still active or will disappear if all the alarms are cleared.

3.5 Basic Control System Diagnostic

MicroTech III controller, extension modules and communication modules are equipped with two status LED (BSP and BUS) to indicate the operational status of the devices. The BUS LED indicates the status of the communication with the controller. The meaning of the two status LED is indicated below.

Main Controller (UC)

(*) Contact Service.

Extension modules

Communication modules

BSP LED (same for all modules)

(*) Contact Service.

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BUS LED

LON

Bacnet MSTP

Bacnet IP

Modbus

Solid Green

Ready for Communication. (All Parameter loaded, Neuron configured). Doesn't indicate a communication with other devices.

Ready for Communication. The BACnet Server is started. It doesn't indicate an active communication

All Communication running

Solid Yellow

Startup

Startup. The LED stays yellow until the module receives a IP Address, therefore a link must be established.

Startup, or one configured channel not communicating to the Master

Solid Red

No Communication to Neuron (internal error, could be solved by downloading a new LON application)

BACnet Server down. Automatically a restart after 3 seconds are initiated.

BACnet Server down. Automatic restart after 3 seconds is initiated.

All configured Communications down. Means no communication to the Master. The timeout can be configured. In case that the timeout is zero the timeout is disabled.

Flashing Yellow

Communication not possible to the Neuron. The Neuron must be configured and set online over the LON Tool.

BUS LED

3.6 Controller maintenance

The controller requires to maintain the installed battery. Every two years it’s required to replace the battery.

Battery model is: BR2032 and it is produced by many different vendors. To replace the battery remove the plastic cover of the controller display using a screw driver as shown in the

following pictures:

Be careful to avoid damages to the plastic cover. The new battery shall be placed in the proper battery holder which is highlighted in the following picture, respecting the polarities indicated into the holder itself.

3.7 Optional Remote User Interface

As an option an external Remote HMI can be connected on the UC. The Remote HMI offers the same features as the inbuilt display plus the alarm indication done with a light emitting diode located below the bell button.

The Remote can be ordered with the unit and shipped loose as a field installed option. It can also be ordered any time after chiller shipment and mounted and wired on the job as explained on the following page. The remote panel is powered from the unit and no additional power supply is required.

All viewing and setpoint adjustments available on the unit controller are available on the remote panel. Navigation is identical to the unit controller as described in this manual.

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



MicroTech® III

The initial screen when the remote is turned on shows the units connected to it. Highlight the desired unit and press the wheel to access it. The remote will automatically show the units attached to it, no initial entry is required.

The Remote HMI can be extended up to 700m using the process bus connection available on the UC. With a daisy-chain connection as below, a single HMI can be connected to up to 8 units. Refer to the specific HMI manual for details.

3.8 Embedded Web Interface

The MicroTech III controller has an embedded web interface that can be used to monitor the unit when connected to a local network. It is possible to configure the IP addressing of the MicroTech III as a fixed IP of DHCP depending on the network configuration.

With a common web browser a PC can connect with the unit controller entering the IP address of the controller or the host name, both visible in the “About Chiller” page accessible without entering a password.

When connected, it will be required to enter a user name and a password. Enter the following credential to get access to the web interface:

User Name: ADMIN Password: SBTAdmin!

The Main Menu page will be displayed. The page is a copy of the onboard HMI and follows the same rules in terms of access levels and structure.

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In addition it allows to trend log a maximum of 5 different quantities. It’s required to click on the value of the quantity to monitor and the following additional screen will become visible:

Depending on the web browser and its version the trend log feature may not be visible. It’s required a web browser supporting HTML 5 like for example:

 Microsoft Internet Explorer v.11,  Google Chrome v.37,  Mozilla Firefox v.32.

These software are only an example of the browser supported and the versions indicated have to be intended as minimum versions.

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Setpoint/Sub-Menu

Default

Range

Description

Enter Password

 - Submenu to activate access levels

View/Set Unit

 - Submenu for unit data and settings

View/Set Circuit

 - Submenu for circuit data and settings

Unit Status=

Off: Unit Sw

Auto Off: Ice Mode Tmr Off: OAT Lockout (A/C units only) Off: All Cir Disabled Off: Unit Alarm Off: Keypad Disable Off: Master Disable Off: BAS Disable Off: Unit Sw Off: Test Mode Off: Schedule Disable Auto: Noise Reduction Auto: Wait For Load Auto: Evap Recirc (A/C units only) Auto: Water Recir (W/C units only) Auto: Wait For Flow Auto: Pumpdn Auto: Max Pulldn Auto: Unit Cap Limit Auto: Current Limit

Status of the Unit

Active Setpoint=

7.0°C, 

Water temperature active setpoint + link to Setpoint page

MS Ctrl Tmp=

-273.1°C, 

Master slave controlled temperature + link to Master Slave Data page

Evaporator LWT=

-273.1°C, 

Evaporator leaving water temperature + link to Temperatures page

Condenser LWT=

-273.1°C, 

Condenser leaving water temperature + link to Temperatures page (W/C units only)

Unit Capacity=

0.0%,

Unit capacity + link to Capacity page

Unit Mode=

Cool, 

Unit Mode + link to Available modes page

Unit Enable=

Enable, 

Unit Enable state + link to unit and circuits enable page

Timers

 - Submenu for unit timers

Alarms

 - Submenu for alarms; same function as Bell Button

Commission Unit

 - Submenu for commission unit

About Chiller

 - Application Info submenu

Setpoint/Sub-Menu

Default

Range

Description

Thermostat Ctrl

 - Submenu for Thermostatic control

Network Ctrl

 - Submenu for Network control

Vfd Settings

 - Submenu Vfd installation settings (A/C units only)

Pumps

 - Submenu for pump settings

Condenser

 - Submenu for Condenser tower control (W/C units Only)

Master/Slave

 - Submenu for Master Slave data and settings

Rapid Restart

 - Submenu for Rapid Restart Option

Date/Time

 - Submenu Date, Time and Quiet Night mode schedule

Scheduler

 - Submenu for Time Scheduler

Power Conservation

 - Submenu Unit Limiting functions

Electrical Data

 - Submenu for electrical data

Ctrl IP Setup

 - Submenu for controller IP-address setup

Da kin on Site



Submenu for connection to Dakin cloud DoS

Menu Password

 - Submenu Disable Password for User level

4 MENU STRUCTURE

All settings are divided in different menus. Each menu collects in a single page other sub-menus, settings or data related to a specific function (for example Power Conservation or Setup) or entity (for example Unit or Circuit). In any of the following pages, a grey box will indicate changeable values and the defaults.

4.1 Main Menu

4.2 View/Set Unit

4.2.1 Thermostat Ctrl

This page resumes all the parameters related to the unit thermostatic control.

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Setpoint/Sub-Menu

Default

Range

Description

TZ/TZ B

Start Up DT=

2.7°C

0.0…5.0°C

Offset to start thermostat control

Shut Dn DT=

1.0°C

1.5°C

0.0…1.7°C

Offset to standby

Stg Up DT=

0.5°C

0.0…1.7°C

Offset to allow compressor starts

Stg Dn DT=

1.0°C

0.7°C

0.0…1.7°C

Offset to force one compressor off

Stg Up Delay=

5 min

3 min

0…60 min

Compressor start interstage

Stg Dn Delay=

3 min

3…30 min

Compressor stop interstage

Strt Strt Dly=

20min

15min

15…60 min

Compressor Start to Start delay

Stop Strt Dly=

5min

3min

3…20 min

Compressor Stop to Start delay

Ice Cycle Dly=

12h

1…23h

Ice cycle delay

Lt Ld Stg Dn %=

40%

20%

20…50%

Circuit capacity threshold to stage down one compressor

Hi Ld Stg Up %=

80%

50%

50…100%

Circuit capacity threshold to stage up one compressor

Max Ckts Run=

1…2

Limit to the number of circuit to be used

C1 Sequence #=

1…2

Manual sequence of circuit #1

C2 Sequence #=

1…2

Manual sequence of circuit #2

Next Crkt On=

Shows next circuit to be started up

Next Crkt Off=

Shows next circuit number to be stopped

Setpoint/Sub-Menu

Default

Range

Description TZ / TZ B

Control Source=

Local

Local, Network

Local Network control selection

Act Ctrl Src=

Local

N/A

Local, Network

Actual control between Local, Network

Netwrk En SP=

Disable

Enable, Disable

Enable unit command from BMS

Netwrk Mode SP=

Cool

Cool, Ice, Heat (NA), Cool/Heat Recovery

Netwrk Cool SP=

6.7°C

Cooling setpoint from BMS

Netwrk Cap Lim=

100%

Capacity limitation from BMS

Netwrk HR SP=

45.0°C

N/A

Heat recovery setpoint from BMS

Network Heat SP=

N / A

45.0°C

Heating setpoint from BMS (W/C Units only)

Netwrk Ice SP=

-4.0°C

Ice setpoint from BMS

Netwrk Current SP=

800A

Sepoint for current limitation from BMS

Remote Srv En=

Disable

Enable, Disable

Remote server enable

Setpoint/Sub-Menu

Default

Range

Description

Baud Rate=

19200

4800, 9600, 19200, 38400

Modbus communication speed

Parity=

None

None, Odd, Even

Parity

Two Stop Bits=

No, Yes

Number of stop bits

485 Resistance=

Active

Active, Passive

RS485 Termination resistance

Set Inv1 Fltr=

Hold

Hold, Exec

Command to enable communication filter on the compressor 1

Set Inv2 Fltr=

Hold

Hold, Exec

Command to enable communication filter on the compressor 2

Setpoint/Sub-Menu

Default

Range

Description

TZ / TZB

Evp Pmp Ctrl=

#1 Only

#1 Only, #2 Only, Auto, #1 Primary, #2 Primary

Set number of Evaporator pumps operational and which priority.

Evap Recirc Tm=

30s

0…300s

Water recirculating timer

Evap Pmp 1 Hrs=

0h Running Hours Evaporator Pump 1 (if present)

Evap Pmp 2 Hrs=

0h Running Hours Evaporator Pump 2 (if present)

Speed 1=

80%

N/A

0-100%

Speed when the input Double Speed Switch is open

Cnd Pump Ctrl=

N/A

#1 Only

#1 Only, #2 Only, Auto, #1 Primary, #2 Primary

Set number of Condenser pumps operational and which priority.

4.2.2 Network Ctrl

This page resumes all settings related to Network control.

4.2.3 Compressor Vfd Setup (A/C Units only)

This page contains basics Vfd Settings. It will be possible to set the Modbus address of each inverter installed on compressors. This function is supposed to be activated in case of compressor replacement. The page will also contain the Modbus setup parameters like baud rate, parity etc.

4.2.4 Pumps

This page contains the settings to define the operation of the primary/backup pumps, the running hours of each pump and all parameters to configure the behavior of the pump driven with an inverter.

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Setpoint/Sub-Menu

Default

Range

Description

TZ / TZB

Cond Pmp 1 Hrs=

N/A

0h Running Hours Condenser Pump 1 (if present)

Cond Pmp 2 Hrs=

N/A

0h Running Hours Condenser Pump 2 (if present)

Speed 2=

60%

N/A

0-100%

Speed when the input Double Speed Switch is close

Thermo Off Speed=

50%

N/A

0-100%

Speed when there are no compressors running

Plant PD=

N/A - Actual Plant Pressure Measurements

Plant PD Sp=

0kPa

N/A

0-1000kPa

Plant Pressure Drop Setpoint

Evap PD=

N/A - Actual Evaporator Pressure Drop Measurements

Min Evap PD=

0kPa

N/A

0-1000kPa

Minimum Evaporator Pressure Drop setpoint

Hysteresis

0kPa

N/A

0-1000kPa

Hysteresis value for bypass value

Pump Speed=

N/A - Actual Pump Speed

Min Speed=

N/A

0-100%

Minimum Pump Speed

Max Speed=

100%

N/A

0-100%

Maximum Pump Speed

Mode=

Auto

N/A

Auto-Manual

Pump mode

Manual Speed=

N/A

0-100%

Manual Pump Speed

Sns Scale=

200kPa

N/A

0-2000kPa

Plant Pressure Drop Sensor Scale

Bypass

Open

N/A

Open,Close

Bypass valve state

Setpoint/Sub-Menu

Default

Range

Description

Cond LWT

-273.1°C

Present value of Condenser Leaving Water Temperature

Cond EWT

-273.1°C

Present value of Condenser Entering Water Temperature

Cond Target

25.0 °C

19.0…55.0 °C

Target for Condenser Leaving Water Temperature

Cond Fan Spd

0.0%

0.0…100.0%

Present value of Condenser Fan Speed

Tower Setpt 1

25.0 °C

19.0…55.0 °C

Setpoint for activation of Tower 1

Tower Setpt 1

27.0 °C

26.0…55.0 °C

Setpoint for activation of Tower 2

Tower Setpt 3

29.0 °C

28.0…55.0 °C

Setpoint for activation of Tower 3

Tower Setpt 4

31.0 °C

30.0…55.0 °C

Setpoint for activation of Tower 4

Tower Diff 1

1.5 °C

0.1…5.0 °C

Differential for deactivation of Tower 1

Tower Diff 2

1.5 °C

0.1…5.0 °C

Differential for deactivation of Tower 1

Tower Diff 3

1.5 °C

0.1…5.0 °C

Differential for deactivation of Tower 1

Tower Diff 4

1.5 °C

0.1…5.0 °C

Differential for deactivation of Tower 1

Min Vfd Sp

10.0%

0.0…49.0 %

Setpoint for minimum percentage of Vfd Speed

Max Vfs Sp

100.0%

55.0…100.0%

Setpoint for maximum percentage of Vfd Speed

PID Prop Gain

10.0

0.0…50.0

Proportional Gain of PID condensation controller

PID Der Time

0...180s

Derivative Time of PID condensation controller

PID Int Time

600s

0…600s

Integral Time of PID condensation controller

Vfd Manual Speed

20.0%

0.0…100.0%

Setpoint for Vfd manual speed

Setpoint/Sub-Menu

Default

Range

Description

Internal Fan

Enable

Disable, Enable

Enable/Disable the pressurization fan internal to the unit switchbox.

Flamablty Lim

23.0 °C

Present value of Flammability limit

Setpoint/SubMenu

Default

Range

Description

Data  -

Submenu Data. This link is available only on the Master unit

Options

 - Submenu Options. This link is available only on the Master unit

Thermostat Ctrl



Submenu Thermostat Ctrl. This link is available only on the Master unit

Timers

 - Submenu Timers. This link is available only on the Master unit

Standby Chiller

 - Submenu Standby Chiller. This link is available only on the Master unit

Disconnect Unit

No,Yes

Parameter to disconnect the unit by the Master Slave system. When this parameter is set to Yes the unit follows all local settings.

4.2.5 Condenser (W/C units only)

This page contains basics settings for condensation control described in section 5.4.

4.2.6 Press Fan (W/C units only)

4.2.7 Master/Slave

All data and parameters available in this sub-menus are related to the Master Slave function. Refer to Master Slave manual for more details.

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Setpoint/Sub-Menu

Default

Range

Description

Next On=

-,Master, Slave 1, Slave 2, Slave 4

Display next chiller that will be starts

Next Off=

-,Master, Slave 1, Slave 2, Slave 4

Display next chiller that will be stopped

Standby=

-,Master, Slave 1, Slave 2, Slave 4

Display the actual standby chiller

Switch Date

dd/mm/yyyy

Display the day in which the standby chiller will be cycled

Switch Time

hh:mm:ss

Display at which time of the switch day the standby chiller will be cycled

Plant Load=

0%...100%

Display the actual plant load

Avg EWT

- - Display the actual average entering water temperature value

Common EWT

- - Display the actual common entering water temperature value

Mst State=

Off, On, Alarm, Comm Err

Display the actual state of the Master

Sl1 State=

Off, On, Alarm, Comm Err

Display the actual state of the Slave 1

Sl2 State=

Off, On, Alarm, Comm Err

Display the actual state of the Slave 2

Sl3 State=

Off, On, Alarm, Comm Err

Display the actual state of the Slave 3

Mst Standalone=

No, Yes

Display if the standalone mode if active on the Master

Sl1 Standalone

No, Yes

Display if the standalone mode if active on the Slave 1

Sl2 Standalone

No, Yes

Display if the standalone mode if active on the Slave 2

Sl3 Standalone

No, Yes

Display if the standalone mode if active on the Slave 3

Mst Load=

0%...100%

Display the actual load of the Master

Sl1 Load=

0%...100%

Display the actual load of the Slave 1

Sl2 Load=

0%...100%

Display the actual load of the Slave 2

Sl3 Load=

0%...100%

Display the actual load of the Slave 3

Mst LWT=

- - Display the Master leaving water temperature

Sl1 LWT=

- - Display the Slave1 leaving water temperature

Sl2 LWT=

- - Display the Slave2 leaving water temperature

Sl3 LWT=

- - Display the Slave3 leaving water temperature

Mst EWT=

- - Display the Master entering water temperature

Sl1 EWT=

- - Display the Slave1 entering water temperature

Sl2 EWT=

- - Display the Slave2 entering water temperature

Sl3 EWT=

- - Display the Slave3 entering water temperature

Mst Hrs=

- - Master running hours

Sl1 Hrs=

- - Slave 1 running hours

Sl2 Hrs=

- - Slave 2 running hours

Sl3 Hrs=

- - Slave 3 running hours

Mst Starts=

- - Master number of starts

Sl1 Starts=

- - Slave 1 number of starts

Sl2 Starts=

- - Slave 2 number of starts

Sl3 Starts=

- - Slave 3 number of starts

Setpoint/Sub-Menu

Default

Range

Description

Master Priority=

1…4

Start Up / Shut Down priority of the chiller Master Priority = 1  highest priority Priority = 4  lowest priority

Slave 1 Priority=

1…4

Start Up / Shut Down priority of the chiller Slave 1 Priority = 1  highest priority Priority = 4  lowest priority

Slave 2 Priority=

1…4

Start Up / Shut Down priority of the chiller Slave 2. Priority = 1  highest priority Priority = 4  lowest priority This menu is visble only if the parameter M/S Num Of Unit has been configured at least with value 3

Slave 3 Priority=

1…4

Start Up / Shut Down priority of the chiller Slave 3. Priority = 1  highest priority Priority = 4  lowest priority This menu is visble only if the parameter M/S Num Of Unit has been configured at least with value 4

Master Enable=

Enable

Enable Disable

This parameter allows to enable or disable locally the Master Chiller

Control Mode=

Complete

Partial Complete

Parameter to select the Partial or Complete control mode Partial  On/Off control

4.2.7.1 Data

In this menu are collected all main data related to Master Slave function.

4.2.7.2 Options

This menu allows to set main parameter of Master Slave function

Air and Water cooled inverter chillers and heat pump

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Setpoint/Sub-Menu

Default

Range

Description

Complete  On/Off + Capacity control

Control Tmp=

Leaving

Entering Leaving

Parameter to define the controlled temperature Entering - Thermoregulations is based on the Average Entering Water Temperature (AEWT) Leaving - Thermoregulation is based on the Common Leaving Water Temperature (CLWT)

Setpoint/Sub-Menu

Default

Range

Description

Stage Up DT=

2.7°C

0.5…5.0°C

Offset respect the active setpoint for the unit startup.

Stage Dn DT =

1.5°C

0.5…5.0°C

Offset respect the active setpoint for the unit shutdown.

Dead Band =

0.2

0.1 - Min(Stage UP DT, Stage Dn DT)

Dead Band respect the active setpoint within which the load/unload command are no longer generated

Threshold=

60%

30...100%

Threshold of load that have to reach all units running before start of a new chiller

Stage Up Time=

5min

0min…20min

Minimum time between the start of two chillers

Stage Dn Time=

5min

0min…20min

Minim time between the stop of two chillers

Min Evap Tmp=

4.0

-18…30°C

Minimum Evaporator leaving water temperature

Setpoint/Sub-Menu

Default

Range

Description

Stage Up Timer=

- - Current delay for new chiller stage up

Stage Dn Timer=

- - Current delay for new chiller stage down

Clear Timers=

Off

Off Reset

This command, visible only with service password, can be used to reset the Stage Up/Dn Timer.

Setpoint/Sub-Menu

Default

Range

Description

Standby Chiller=

No, Auto, Master, Slave 1, Slave 2, Slave 3

Standby chiller selection

Cycling Type=

Time

Run Hours, Sequence

Cycling type of standby chiller if previous parameter Standby Chiller is set as Auto

Interval Time=

7 Days

1…365

Define the interval time (expressed in day) for the cycling of standby chiller

Switch Time=

00:00:00

00:00:00…23:59:59

Define the time within the day when will be performed the switch of the standby chiller

Tmp Cmp=

No,Yes

Enabling of Temperature Compensation function

Tmp Comp Time=

120 min

0…600

Time constant of Temperature Compensation function

Standby Reset=

Off

Off, Reset

Parameter to reset standby chiller cycling timer

Setpoint/Sub-Menu

Default

Range

Description

Rapid Restart=

Disable

Enable, Disable

Feature enable if Rapid Restart is installed

Pwr Off Time=

60s - Maximum black out time to enable Rapid Restart

4.2.7.3 Thermostat Ctrl

This page resumes all thermostat control parameter of Master Slave.

4.2.7.4 Timers

4.2.7.5 Standby Chiller

This menu allows to configure the standby chiller

4.2.8 Rapid Restart

This page shows if the function Rapid Restart is enabled by external contact and it allows to define the maximum black out time in order to recover quickly the unit load.

4.2.9 Date/Time

This page will allow to adjust the time and date in the UC. This time and date will be used in the alarm log and to enable and disable the Quiet Mode. Additionally it’s also possible to set the starting and ending date for the DayLight Saving time (DLS) if used. Quiet Mode is a feature that is used to reduce the chiller noise. This is done by applying the maximum setpoint reset to the cooling setpoint and increasing the condenser temperature target by an adjustable offset.

Air and Water cooled inverter chillers and heat pump

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EWAD TZ - EWAD TZ B -EWWD VZ Air and Water cooled inverter chillers and heat pump

Setpoint/Sub-Menu

Default

Range

Description

TZ / TZ B

Actual Time=

12:00:00

Present time

Actual Date=

01/01/2014

Present date

UTC Diff=

-60min

Difference with UTC

DLS Enable=

Yes

Yes No, Yes

DLS Strt Month=

Mar

Mar DayLight Saving time start month

DLS Strt Week=

2ndWeek

DayLight Saving time start week

DLS End Month=

Nov

NA, Jan…Dec

DayLight Saving time end month

DLS End Week=

1stWeek

st…5th

week

DayLight Saving time end week

Quiet Mode=

Disable

N/A

Disable, Enable

Activate Quiet Mode

QM Start Hr=

21h

N/A

18…23h

Quiet Mode start hour

QM Start Min=

0min

N/A

0…59min

Quiet Mode start minute

QM End Hr=

N/A

5…9h

Quiet Mode end hour

QM End Min=

0min

N/A

0…59min

Quiet Mode end minute

QM Cond Offset=

5°C

N/A

0.0…14.0°C

Quiet Mode condenser target offset

Setpoint/Sub-Menu

Default

Range

Description

State

Off

Off, On Setpoint 1, On Setpoint 2

Actual state provided by the time scheduler

Monday

 - Link to Monday scheduler programming page

Tuesday

 - Link to Tuesday scheduler programming page

Wednesday

 - Link to Wednesday scheduler programming page

Thursday

 - Link to Thursday scheduler programming page

Friday

 - Link to Friday scheduler programming page

Saturday

 - Link to Saturday scheduler programming page

Sunday

 - Link to Sunday scheduler programming page

Setpoint/Sub-Menu

Default

Range

Description

Time 1

*:*

0:00..23:59

Define the starting time of 1st time slot

Value 1

Off

Off, On Setpoint 1, On Setpoint 2

Define the unit state during 1st time slot

Time 2

*:*

0:00..23:59

Define the starting time of 2nd time slot

Value 2

Off

Off, On Setpoint 1, On Setpoint 2

Define the unit state during 2nd time slot

Time 3

*:*

0:00..23:59

Define the starting time of 3rd time slot

Value 3

Off

Off, On Setpoint 1, On Setpoint 2

Define the unit state during 3rd time slot

Time 4

*:*

0:00..23:59

Define the starting time of 4th time slot

Value 4

Off

Off, On Setpoint 1, On Setpoint 2

Define the unit state during 4th time slot

Time 5

*:*

0:00..23:59

Define the starting time of 5th time slot

Value 5

Off

Off, On Setpoint 1, On Setpoint 2

Define the unit state during 5th time slot

Time 6

*:*

0:00..23:59

Define the starting time of 6th time slot

Value 6

Off

Off, On Setpoint 1, On Setpoint 2

Define the unit state during 6th time slot

Setpoint/SubMenu

Default

Range

Description

TZ/TZ B

Unit Capacity=

100.0%

Demand Lim En=

Disable

Disable, Enable

Demand Limit Enable

Demand Limit=

100.0%

Demand Limit Mode - Active demand limitation

Unit Current=

0.0A

E/M Only

Current Limit Mode (optional) - Unit current reading

Current Limit=

800A

Current Limit Mode (optional) - Active Current limit

Flex Current Lm=

Disable

Disable, Enable

Flexible Current Limit Enable

Current Lim Sp=

800A

0…2000A

Current Limit Mode (optional) - Current limit setpoint

Setpoint Reset=

None

None, 4-20mA, Return, OAT

Setpoint Reset Type (OAT reset Max Reset=

5.0°C

0.0…10.0°C

Setpoint Reset Mode - Max Reset of water temp. setpoint

On board real time clock settings are maintained thanks to a battery mounted on the controller. Make sure that the battery is replaced regularly each 2 years (see section 3.6).

4.2.10 Scheduler

This page allows to program the time scheduler

Table below reports the menu used to program daily time slots. Six time slots can be programmed by the user.

4.2.11 Power Conservation

This page resumes all the settings that allows chiller capacity limitations. Further explanations of the setpoint reset options can be found in the chapter 7.2.

+ 58 hidden pages

Daikin EWAD TZ-B user guide manual

Specifications and Main Features

Frequently Asked Questions

User Manual