dixell Ichill 260L_D DUO, Ichill 261L_D DUO User Manual

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1592015820 User Manual IC200L/D DUO rel 1.0

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User Manual Ichill 260L_D DUO Ichill 261L_D DUO

(Firmware version 1.9)

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INDEX

1. GENERAL FEATURES .............................................................................................. 8

1.1 Main Function ................................................................................................................................................ 8

2. ICHILL 260/261L_D FEATURES ............................................................................. 10

3. USER INTERFACE .................................................................................................. 11

4. REMOTE KEYBOARD ............................................................................................. 15

5. FIRST INSTALLING ................................................................................................. 15

6. WIRING CONNECTIONS ......................................................................................... 16

7. ANALOG AND DIGITAL OUTPUT CONFIGURATION ........................................... 26

8. PROGRAMMING WITH THE “HOT KEY 64” ......................................................... 31

9. PROGRAMMING USING THE KEYBOARD ............................................................ 31

10. CHILLER / HEAT PUMP SELECTION ..................................................................... 36

11. HOW TO SWITCH ON / SWITCH OFF THE UNIT ................................................... 37

12. SWITCH ON / SWITCH OFF THE CONDENSING UNIT BY DIGITAL INPUT ......... 37

13. DISPLAY LAYOUT ................................................................................................... 38

14. DISPLAY CONFIGURATION ................................................................................... 39

15. DISPLAY INFORMATION ........................................................................................ 41

16. FUNCTION MENU “ M” KEY ................................................................................... 42

16.1.1 Compressor overload alarm; manual reset ................................................................................................43

16.1.2 Compressor overload alarm; manual reset with password .........................................................................43

17. ENERGY SAVING .................................................................................................... 48

17.1 Energy Saving Activation By Digital Input ..................................................................................................48

17.2 Energy Saving Time Table With Rtc ............................................................................................................48

18. DYNAMIC SETPOINT .............................................................................................. 49

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19. COMPRESSOR REGULATION ............................................................................... 51

19.1 Compressor Security Time ...........................................................................................................................51

20. CHILLER / HEAT PUMP REGULATION .................................................................. 51

20.1 Parameter Description ..................................................................................................................................51

20.2 Proportional Regulation ...............................................................................................................................52

20.3 Neutral Zone Regulation...............................................................................................................................53

21. COMPRESSORS MANAGEMENT ........................................................................... 54

21.1 Compressors Start- Up .................................................................................................................................54

22. COMPRESSORS ROTATION .................................................................................. 56

23. CAPACITY STEP CONTROL................................................................................... 56

23.1 Minimum Load Start- Up .............................................................................................................................58

23.2 Intermittent Solenoid Valve for Screw Compressor ....................................................................................58

24. COMPRESSOR INVERTER CONTROLLED ........................................................... 58

24.1 Inverter Compressor In Heat Pump And External Temperature ...............................................................62

25. COMPRESSOR RACK ............................................................................................. 62

26. COMPRESSORS WITH DIFFERENT CAPACITY ................................................... 63

27. CIRCUIT MANAGEMENT: SATURATION OR BALANCING .................................. 64

28. PUMP DOWN ........................................................................................................... 64

29. UNLOADING ............................................................................................................ 66

29.1 High Temperature Of The Evaporator Water Inlet ....................................................................................66

29.2 Condenser High Pressure, Condenser High Temperature Or Evaporator Low Pressure ..........................66

29.3 Low Temperature Of The Evaporator Water Outlet...................................................................................67

30. SOLENOID VALVE FOR LIQUID INJECTION......................................................... 67

31. EVAPORATOR WATER PUMP / SUPPLY FAN (AIR/AIR UNIT) ............................ 67

31.1 Evaporator Pump Group ..............................................................................................................................68

31.2 Modulating Evaporator Water Pump ..........................................................................................................68

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32. WATER PUMP OF THE CONDENSER ................................................................... 69

32.1 Condenser Pump Group ...............................................................................................................................70

33. CYCLIC OPERATION OF THE WATER PUMPS .................................................... 70

34. HOT START ............................................................................................................. 71

35. LOAD MAINTENANCE ............................................................................................ 71

36. CONDENSER FAN REGULATION .......................................................................... 71

36.1 Output Step Rele’ Condenser Fan ................................................................................................................72

36.2 Pwm Output For Fan Control ......................................................................................................................73

36.3 Condensing Unit: Common Or Separate Condenser ...................................................................................73

36.4 Proportional Regulation Of Condenser Fans ...............................................................................................73

36.5 On/Off Regulation Of Condenser Fans ........................................................................................................74

36.6 Pre-Ventilation And Post-Ventilation...........................................................................................................74

37. ANTI FREEZE HEATERS, INTEGRATION HEATING OR BOILER ........................ 75

38. AUXILIARY RELAYS ............................................................................................... 77

39. AUXILIARY PROPORTIONAL OUTPUTS ............................................................... 78

40. DEFROST CYCLE .................................................................................................... 81

40.1 Automatic Defrost Procedure .......................................................................................................................81

40.2 Other Information About The Defrost .........................................................................................................82

40.3 Forced Defrost ..............................................................................................................................................83

40.4 Combined Defrost .........................................................................................................................................83

40.5 Manual Defrost .............................................................................................................................................83

40.6 Defrost In Unit With Two Circuits ...............................................................................................................83

40.6.1 Start defrost in unit with common condenser ............................................................................................83

40.6.2 End defrost in unit with two condenser ....................................................................................................83

40.7 Defrost With Condenser Fan Procedure ......................................................................................................84

40.8 Defrost Parameter Description .....................................................................................................................84

40.9 Defrost Dynamic Set Point ............................................................................................................................86

41. PRODUCTION OF SANITARY HOT WATER .......................................................... 87

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41.1 Anti-Legionella Function ..............................................................................................................................89

41.2 Water Pumps Management ..........................................................................................................................90

41.3 Sanitary Water Second Set Point .................................................................................................................91

41.4 Sanitary Hot Water Production: Valves In Water Circuit ___ Fs01=1 (Air/Water, Water/Water Unit) ...91

41.4.1 - Sanitary hot water operation when the unit is producing hot water .........................................................91

41.4.2 - Sanitary hot water operation when the unit is producing cold water ........................................................92

41.5 Sanitary Hot Water Production: Valves In Gas Circuit ___ Fs01=2 (Air/Water, Water/Water Unit) .......92

41.5.1 Sanitary hot water operation when the unit is producing hot water ............................................................92

41.5.2 - Sanitary hot water operation when the unit is producing cold water ........................................................92

42. SOLAR PANEL MANAGEMENT ............................................................................. 94

42.1 Solar Panel In Sanitary Hot Water ..............................................................................................................94

42.2 Solar Panel In Heating Mode ........................................................................................................................94

43. UNIT WITH HYBRID EXCHANGERS (AIR / WATER UNIT).................................... 95

44. GEOTHERMAL FREE COOLING ............................................................................ 96

44.1 Fan speed control if compressors and free cooling are used for cooling (CF97=3)......................................98

45. RECOVERY FUNCTION .......................................................................................... 98

45.1 Unit With Two Separate Idraulic Circuits ...................................................................................................98

45.2 Unit With Two Idraulic Circuit Working In Parallel ..................................................................................99

46. CONDENSER TEMPERAURE / PRESURE CONDITION TO ENABLE/DISABLE

THE RECOVERY CYCLE ............................................................................................... 100

46.1 Recovery Disabled....................................................................................................................................... 100

46.2 Recovery Enabled ....................................................................................................................................... 101

46.3 Note About Recovery Enabled/Disabled .................................................................................................... 101

47. OPERATION RELATED TO THE REAL TIME CLOCK ......................................... 101

47.1 Real Time Clock Disabled By Digital Input ............................................................................................... 101

47.2 “Only supply fan” working mode” ............................................................................................................. 101

48. MESSAGES - ALARM CODES ............................................................................. 101

48.1 Automatic / Manual Alarm Description ..................................................................................................... 101

C1Pd - C2Pd – compressor oil differential pressure.............................................................................................. 115

49. AUTOMATIC TO MANUAL ALARM PROCEDURE .............................................. 120

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49.1 Alarm .......................................................................................................................................................... 121

49.2 Alarm: Circuit Alarm ................................................................................................................................. 122

49.3 Alarm: Compressor Alarm ......................................................................................................................... 123

50. TABLE OF THE PARAMETERS ............................................................................ 124

51. BLACK-OUT........................................................................................................... 145

52. INSTALLING AND MOUNTING ............................................................................. 145

52.1 ICHILL 200 L FORMAT: Panel cut- out .................................................................................................. 145

52.2 ICHILL 200 L FORMAT: metal front frame ............................................................................................ 145

52.3 Ichill 200 Din Format SERIES ................................................................................................................... 146

52.4 Vertical boards Vi620 – panel cut-out ........................................................................................................ 146

53. ELECTRICAL CONNECTIONS .............................................................................. 147

54. ACCESSORIES ...................................................................................................... 147

55. TECHNICAL DATA ................................................................................................ 149

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General advice

PLEASE READ BEFORE USING THIS MANUAL

 This manual is part of the product and should be kept near the instrument for easy and quick reference.  The instrument shall not be used for purposes different from those described hereunder. It cannot be

used as a safety device.

 Check the application limits before proceeding  The technical data and information in the user manual could change without obligation to notice.

SAFETY PRECAUTIONS

 Check the supply voltage is correct before connecting the instrument.  Do not expose to water or moisture: use the controller only within the operating limits avoiding sudden

temperature changes with high atmospheric humidity to prevent formation of condensation

 Warning: disconnect all electrical connections before any kind of maintenance.  The instrument must not be opened.  In case of failure or faulty operation send the instrument back to the distributor or to “Dixell company with

a detailed description of the fault.

 Consider the maximum current which can be applied to each relay (see Technical Data).  Ensure that the wires for probes, loads and the power supply are separated and far enough from each

other, without crossing or intertwining.

 Fit the probe where it is not accessible by the end user.  In case of applications in industrial environments, the use of mains filters (our mod. FT1) in parallel with

inductive loads could be useful.

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1. GENERAL FEATURES

IC260L_D/261L_D is an electronic controller for chiller unit applications having one or two circuits:

 Air/air  Air/water  Water/water  Condensing unit

Additional features :  Heat pump with gas reversibility

1.1 MAIN FUNCTION

Chiller management:

 One circuit up to 4 compressors  Double circuit up to 6 compressors  Screw compressors

Compressor start up:

 Direct  Part winding  Star - delta

Capacity step control:

 Continuous control  Step control  Modulation control (screw compressors)

Regulation of the compressors

 Working hour trade-off  Start-up trade-off

Management of two pump groups

 2 pumps evaporator side  2 pumps condenser side

Pump down management

 With dedicated pressure switch  Low pressure switch  Low pressure transducer

Unloading circuit

 High temperature of the evaporator inlet water  High temperature of the condenser inlet water (unit with recovery)  High condensing pressure  Low evaporating pressure

Maintenance messages

 Compressors  Evaporator pumps  Condenser pumps

Auxiliary relays

 It is possible to configure two relays with indipendent regulation

Weekly Energy saving

 Three different time bands per day (only if RTC onboard)  Energy saving enabled by digital input

Weekly ON/OFF:

 Three different time bands per day (only if RTC onboard)

Dynamic setpoint:

 It is possible to modify the set point according to outside temperature or a dedicated 4..20mA probe

Change over :

 Automatic operative mode selection (chiller / heat pump) maccording to outside temperature

Defrost management:

 Combined control temperature / pressure

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 Forced defrost  Different way to enable the defrost (temperature / pressure / digital input)

Boiler:

 For heating integration

Two proportional outputs for condensing fan speed control (inverter or phase cut) with configurable signal:

 PWM  0÷10Volt  4÷20mA

Four proportional control outputs 0÷10V or ON/OFF

 To control the dumper  To control an external relay

Complete alarm management

 Internal Data logger up to 100 events

Supervisor / monitoring

 TTL output for XJ485 interface (ModBus protocol) for XWEB Dixell monitoring system

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2. ICHILL 260/261L_D FEATURES

FEATURES IC290D IC291D

OUTPUT RELAYS



DIGITAL INPUTS

18 configurable configurable

PROBE INPUTS

6 (NTC/PTC) configurable configurable 4 (NTC/PTC/0..5V/4..20mA) configurable configurable

PROPORTIONAL OUTPUTS

2 PWM outputs for condensing fan

 

2 0÷10V or 4÷20mA for condensing fan configurable configurable 4 0÷10V configurable configurable

OTHER OUTPUTS

TTL

 

Output for remote keyboard VGI890

 

POWER SUPPLY

12 Vac/dc (+15%;-10%)

 

24 Vac/dc (± 10%) opt opt

OTHERS

Internal RTC opt opt Buzzer opt opt

 configurable = configurable by parameter  opt = optional

  = default

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3. USER INTERFACE

Meaning of the LEDs

IC260L / IC261L models

IC260L / IC261L metal front panel

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Meaning of the leds on the models VI620 - VI620S remote keyboard

KEY FUNCTION

KEY ACTION

FUNCTION

Push and release

Show chiller set point

SetC

and heat pump

SetH

Push once

In chiller or heat pump if the Energy saving or the Dynamic setpoint are enabled it shows the real

setpoint Setr, the led is blinking. Push for 3 seconds the release Change between chiller / heat pump During the programming: push one time

Select a parameter or confirm a value Push once with probe label

showed on the bottom display

Change between the read-out of the circuit 1 and the

circuit 2 and viceversa

UP KEY

Push once Select the readings of the first circuit Pushing once during the programming

To change the parameter code or value Push for 1 second during the

programming

1 time shows the Pr2 programming level

2 time shows the Pr3 programming level

TASTO DOWN

Push once Select the readings of the second circuit Pushing one time during the

programming

To change the parameter code or value

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Push once

Turn the chiller on, if the unit is on led is on

The led is blinking if there is a power on delay or

during the pump down

Push once

Turn the heat pump on, if the unit is on led is on

The led is blinking if there is a power on delay or

during the pump down Push once enter the function Menu

Push for 3 seconds To set RTC parameters (if the RTC is inside) Pushing once during the programming

To exit from a group of parameter

KEY COMBINANTION

KEY ACTION

FUNCTION

Push for 3 seconds together Enter the programming In Pr3 level: push SET and the

push DOWN key

Select the parameter level visibility Pr1 / Pr2 / Pr3

Push once together

Exit the programming

Push 5 seconds (heat pump with ok condition)

Manual defrost

In Pr3 programming level Push SET and then the MENU key

In Pr3 defines if the parameter can be changed or not in the other levels.

LED and ICONS

ICON

LED FUNCTION

ON Auxiliary relay #1 active

OFF Auxiliary relay #1 not active

ON Auxiliary relay #2 active

OFF Auxiliary relay #2 not active

BLINKING

Defrost delay counting active

Defrost

OFF

Defrost end

Display and Icons

ICON

MEANING / FUNCTIONNING

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Celsius degrees: ON for temperature measurements of probe values or parameters

Fahrenheit degrees: ON for temperature measurements of probe values or parameters

Bar: ON for pressure measurements of probe values, setpoint or parameters

PSI

Psi: ON for pressure measurements of probe values, setpoint or parameters

ON = compressor 1 active Blinking = compressor 1 delay counting

ON = compressor 2 active Blinking = compressor 2 delay counting

ON = compressor 3 active Blinking = compressor 3 delay counting

ON = compressor 4 active Blinking = compressor 4 delay counting

ON = compressor 5 active Blinking = compressor 5 delay counting

ON = compressor 6 active Blinking = compressor 6 delay counting

General alarm: blinking if there is an alarm not identified by an icon

Anti freeze heaters/ integration heating / boiler: ON if the output is on

Flow alarm/ (differential) pressure switch / supply fan thermal (air / air unit) : is blinking if the configuration of the digital input is active

Real time clock: On when the bottom display show the RTC ON during the programming with time based parameter value In function menu indicates the defrost delay counting

Water pump: On if at least one of the four configurable pump group is on

Condenser fan: ON if at least one of the PWM or relay outputs for fan control is active

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Meaningg of the bottom display led

Led # 1 – 2 (With RTC)

If the bottom display shows the RTC the 1 and 2 leds are blinking.

Led # 1 – 2 In function Menu

During the time counting to the next defrost for one or both circuits the led 1 and 2 are blinking. LED Parameter programming

In Pr2 level: led #3 indicates the visibility while the #1 and #2 show if the parameter can be modified or not. In Pr3 level: led #3 and #4 indicate the visibility while the #1 and #2 show if the parameter can be modified or not.

4. REMOTE KEYBOARD

The IC200L/D can be connected with 2 remote keyboard. The remote keyboard can have the NTC probe on board that is used to show the room temperature and also to control the temperature regulation. To connect the remote keyboard it is necessary to use shielded cable for a maximum lenght of 150mt. In case of no communication between the instrument and the remote keyboard the display shows “noL” (no link). Mod. VI620 – standard keyboard Mod VI620S – keyboard with internal temperature probe Use the connection cable CAB/CJ30 (2x0.2 mm2) to interface the IC connector to the shielded wire.

5. FIRST INSTALLING

On Board Clock (Optional)

Giving power supply the bottom display shows “rtC” alternated with a temperature or pressure value: It is necessary to set the RTC.

If the probes are not connected the display shows the corresponding probe alarm messages. In this situation the RTC setup and the programming are available.

ATTENTION The RTC function is an optional and it is not possible to update the instrument but it is necessary to order the instrument already complete of this features.

With power failure the RTC back-up battery maximum duration is 1 week. After this period it is necessary to setup the clock again.

Real Time Clock Setup

1. Push M key for 3 seconds until the bottom display shows “Hour” and the top display shows its value.

2. Push SET one time: the value is blinking.

3. Use the Up and Down keys to adjust it. Push SET one time to confirm; automatically the display shows next parameter.

4. Repeat the operations 2. 3. and 4. for all the RTC parameters:

- Min: minutes (0÷60)

- UdAy: day of the week (Sun = Sunday, Mon =Monday, tuE =Tuesday, UEd = Wednesday, tHu = Thursday, Fri =Friday, SAt =Saturday)

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- dAy: day of the month (0÷31)

- MntH: month (1÷12)

- yEAr: year (00÷99)

6. WIRING CONNECTIONS

Ichill 260L

10 relays 18 digital inputs (free of voltage) 10 analogue inputs: NTC probes or through configuration 6 NTC / PTC and 4 pressure transducer 4÷20mA or ratio-metric 0÷ 5.0Volt 6 modulating outputs 1 output for remote panel (max 2 remote panels) 1 TTL output for “Hot Key 64” connection or for XJ485, interface module for monitoring system, connection. MAX current on the relay contacts relè 5(2)A 250V - MAX common current 12A 250V

Ichill 261L

14 relays 18 digital inputs (free of voltage) 10 analogue inputs: NTC probes or through configuration 6 NTC / PTC and 4 pressure transducer 4÷20mA or ratio-metric 0÷ 5.0Volt 6 modulating outputs 1 output for remote panel (max 2 remote panels) 1 TTL output for “Hot Key 64” connection or for XJ485, interface module for monitoring system, connection. MAX current on the relay contacts relè 5(2)A 250V - MAX common current 12A 250V

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Ichill 260D

10 digital outputs (relays) 18 digital inputs (free of voltage) 10 analogue inputs: NTC probes or through configuration 6 NTC / PTC and 4 pressure transducer 4÷20mA or ratio-metric 0÷ 5.0Volt 6 modulating outputs 1 output for remote panel (max 2 remote panels) 1 TTL output for “Hot Key 64” connection 1 RS485 output with modbus RTU protocol for monitoring system, connection. MAX current on the relay contacts relè 5(2)A 250V - MAX common current 12A 250V

Ichill 261D

14 digital outputs (relays) 18 digital inputs (free of voltage) 10 analogue inputs: NTC probes or through configuration 6 NTC / PTC and 4 pressure transducer 4÷20mA or ratio-metric 0÷ 5.0Volt 6 modulating outputs 1 output for remote panel (max 2 remote panels) 1 TTL output for “Hot Key 64” connection 1 RS485 output with modbus RTU protocol for monitoring system. MAX current on the relay contacts relè 5(2)A 250V - MAX common current 12A 250V

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Temperature probes connection (NTC – PTC Probes)

Connection diagram for IC260L / IC261L / IC260D and IC261D.

PbC = Probes common terminal

Digital Inputs

Connection diagram for IC260L / IC261L / IC260D and IC261D. GND = Digital inputs common terminal

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Pressure Transducer connection (4 ÷ 20mA signal)

Connection diagram for IC260L / IC261L / IC260D and IC261D.

12V = Pressure trasducers common terminal

Ratiometric Transducer connection (0 ÷ 5V signal)

Connection diagram for IC260L / IC261L / IC260D and IC261D.

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PWM Output for Condensing Fan Speed Control

Connection diagram for IC260L / IC261L / IC260D and IC261D. The PWM signal has to be connected to the cut of phase controller: Mod. XV05PK mono-phase , cut phase control 500 Watt (2A) Mod. XV10PK mono-phase , cut phase control 1000 Watt (4A) Mod. XV22PK mono-phase , cut phase control 2200 Watt (9A)

Condensing Fan control: 0 ÷ 10Vdc signal

Connection diagram for IC260L / IC261L / IC260D and IC261D. In case of only one condensing circuit configured, the Out1 / Out2 outputs work together giving the same signal.

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Condensing Fan Control: 4÷20mA signal

Connection diagram for IC260L / IC261L / IC260D and IC261D. In case of only one condensing circuit configured, the Out1 / Out2 outputs work together giving the same signal.

Proportional outputs 0 ÷ 10V dumper control

Connection diagram for IC260L / IC261L / IC260D and IC261D.

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If the dumper motor has a common pole for the 0..10V and the power supply, the connection has to be done as showed below. Ground connection has to be evaluated case per case.

Proportional outputs configured to manage an external relay

Connection diagram for IC260L / IC261L / IC260D and IC261D.

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Hot Key 64 Connection

Connection diagram for IC260L / IC261L / IC260D and IC261D. The programming HOT KEY 64 allows to upload or download a copy of the parameters of the instrument (see HOT KEY paragraph).

XJ485 Connection

Connection diagram for IC260L / IC261L . The XJ485 interface is a converter between the RS485 and the TTL connector output. The RS485 uses two terminals (+) and (-) that must be connected respecting the polarity to build the serial line. Use the CAB/RS02 to connect the XJ485 interface to the TTL connector.

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RS485 connection (IC260D / IC261D)

The Ichill 260D and Ichill 261D have a RS 485 output to connect the controller to the ProgTool or a XWEB (monitoring, controlling and supervising system). Make attention to the polarity of the RS 485 signal.

Remote keyboard VI620

Connection diagram for IC260L / IC261L / IC260D and IC261D. Using the remote panels provided with the ambient NTC probe the display measurement, and the control can be managed directly by this probe. Use shielded cable for the connection up to 150mt maximum. In case of communication failure the upper display shows “noL” (no link). Use the CAB/CJ30 to interface the ichill connector to the shielded cable. It is possible to connect maximu 2 remote keyboard.

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7. ANALOG AND DIGITAL OUTPUT CONFIGURATION

Analog input Pb1 - Pb2 - Pb7 - Pb8 - Pb9 - Pb10

Parameters involved: CF08 = Configuration PB1 CF09 = Configuration PB2 CF14 = Configuration PB7 CF15 = Configuration PB8 CF16 = Configuration PB9 CF17 = Configuration PB10

0. Not enabled

1. Temperature probe PTC for compressor 1 discharge

2. Temperature probe PTC for compressor 2 discharge

3. Temperature probe PTC for compressor 3 discharge

4. Temperature probe PTC for compressor 4 discharge

5. Temperature probe PTC for compressor 5 discharge

6. Temperature probe PTC for compressor 6 discharge

7. Temperature probe PTC for solar panel

8. Temperature probe NTC for evaporator inlet

9. Temperature probe NTC for evaporator 1 outlet

10. Temperature probe NTC for evaporator 2 outlet

11. Temperature probe NTC for common evaporator outlet

12. Temperature probe NTC for common hot water condenser / recovery inlet

13. Temperature probe NTC for hot water of the condenser / recovery circuit 1 inlet

14. Temperature probe NTC for hot water of the condenser / recovery circuit 2 inlet

15. Temperature probe NTC for hot water of the condenser / recovery circuit 1 outlet

16. Temperature probe NTC for hot water of the condenser / recovery circuit 2 outlet

17. Temperature probe NTC for hot water of the condenser / recovery common outlet

18. Temperature probe NTC for free cooling water inlet circuit

19. Temperature probe NTC for dynamic setpoint external air / boiler / change over

20. Temperature probe NTC for combined defrost circuit 1

21. Temperature probe NTC for combined defrost circuit 2

22. Temperature probe NTC for auxiliary output 1

23. Temperature probe NTC for auxiliary output 2

24. Temperature probe NTC sanitary water 1

25. Temperature probe NTC sanitary water 1

26. Temperature probe NTC solar panel

27. Temperature probe NTC for condensing circuit 1

28. Temperature probe NTC for condensing circuit 2

After the number 28 the configuration can be selected from o 1 to c73 that allows to set an analogue input as digital input (see polarity of the digital input/outputs).

Analog input Configuration Pb3 - Pb4 - Pb5 - Pb6

Parameter involved: CF10 = Configuration PB3 CF11 = Configuration PB4 CF12 = Configuration PB5 CF13 = Configuration PB6

0 Not enabled 1 Temperature probe PTC for compressor 1 discharge 2 Temperature probe PTC for compressor 2 discharge 3 Temperature probe PTC for compressor 3 discharge 4 Temperature probe PTC for compressor 4 discharge 5 Temperature probe PTC for compressor 5 discharge 6 Temperature probe PTC for compressor 6 discharge 7 Temperature probe PTC for solar panel 8 Temperature probe NTC for evaporator inlet 9 Temperature probe NTC for evaporator outlet 1

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10 Temperature probe NTC for evaporator outlet 2 11 Temperature probe NTC for common evaporator outlet 12 Temperature probe NTC for common hot water condenser / recovery inlet 13 Temperature probe NTC for hot water condenser / recovery inlet circuit 1 14 Temperature probe NTC for hot water condenser / recovery inlet circuit 2 15 Temperature probe NTC for hot water condenser / recovery outlet circuit 1 16 Temperature probe NTC for hot water condenser / recovery outlet circuit 2 17 Temperature probe NTC for hot water condenser / recovery common outlet circuit 18 Temperature probe NTC for free cooling water inlet 19 Temperature probe NTC for external air dynamic setpoint/ boiler / change over 20 Temperature probe NTC for combined defrost circuit 1 21 Temperature probe NTC for free cooling water inlet 2 22 Temperature probe NTC for auxiliary output 1 23 Temperature probe NTC for auxiliary output 2 24 Temperature probe NTC sanitary water 1 25 Temperature probe NTC sanitary water 2 26 Temperature probe NTC solar panel 27 Condenser probe circuit 1 ( temperature NTC / pressure 4÷20 mA / ratio-metric 0÷ 5Volt ) 28 Condenser probe circuit 2 ( temperature NTC / pressure 4÷20 mA / ratio-metric 0÷ 5Volt ) 29 Evaporator pressure probe circuit 1 (pressure 4÷20 mA / ratio-metric 0÷ 5Volt ) 30 Evaporator pressure probe circuit 1 (pressure 4÷20 mA / ratio-metric 0÷ 5Volt ) 31 Aux 1 output probe control (4÷20 mA / ratio-metric 0÷ 5Volt) 32 Aux 2 output probe control (4÷20 mA / ratio-metric 0÷ 5Volt) 33 Dynamic setpoint probe (4÷20 mA) 34 Compressor 1 or circuit 1 pressure probe 35 Compressor 2 or circuit 2 pressure probe After the number 35 the display read-out goes from “o 1” to “c73 that allows to set an analogue input as digital input (see polarity input of digital inputs).

Digital Input Configuration Id1 – Id18

Parameters involved: CF36 = Configuration ID1…CF53 = Configuration ID18

0. Not enabled

1. Remote ON / OFF

2. Remote chiller / heat pump

3. Flow switch/ Supply fan overload

4. Flow switch of heated side

5. Antifreeze heater circuit 1

6. Antifreeze heater circuit 2

7. High pressure switch circuit 1

8. High pressure switch circuit 2

9. Low pressure switch circuit 1

10. Low pressure switch circuit 2

11. Compressor 1 high pressure

12. Compressor 2 high pressure

13. Compressor 3 high pressure

14. Compressor 4 high pressure

15. Compressor 5 high pressure

16. Compressor 6 high pressure

17. Compressor 1 overload

18. Compressor 2 overload

19. Compressor 3 overload

20. Compressor 4 overload

21. Compressor 5 overload

22. Compressor 6 overload

23. Condenser fan overload of circuit 1

24. Condenser fan overload of circuit 2

25. Condenser fan overload of circuit 1 and 2 (comun)

26. Water pump overload of evaporator 1

27. Water support pump overload of evaporator

28. Water pump overload of condenser 1

29. Water support pump overload of condenser

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30. Recovery request circuit 1

31. Recovery request circuit 2

32. Start/End defrost circuit 1

33. Start/End defrost circuit 2

34. Energy Saving

35. Pressure switch / compressor 1 oil

36. Pressure switch / compressor 2 oil

37. Pressure switch / compressor 3 oil

38. Pressure switch / compressor 4 oil

39. Pressure switch / compressor 5 oil

40. Pressure switch / compressor 6 oil

41. Pump down pressure switch of circuit 1

42. Pump down pressure switch of circuit 2

43. Generic alarm from digital input with stop regulation n° 1

44. Generic alarm from digital input with stop or signal regulation n° 2

45. Operation working mode: by RTC or keyboard

46. Operation mode with supplay fan only

47. Digital input of thermoregulation request (condensing unit)

48. Digital input of cooling request (condensing unit)

49. Digital input of heating request (condensing unit)

50. Request step 2 (condensing unit)

51. Request step 3 (condensing unit)

52. Request step 4 (condensing unit)

53. Request step 5 (condensing unit)

54. Request step 6 (condensing unit)

55. Request step 7 (condensing unit)

56. Request step 8 (condensing unit)

57. Request step 9 (condensing unit)

58. Request step 10 (condensing unit)

59. Request step 11 (condensing unit)

60. Request step 12 (condensing unit)

61. Request step 13 (condensing unit)

62. Request step 14 (condensing unit)

63. Request step 15 (condensing unit)

64. Request step 16 (condensing unit)

65. Sanitary water flow switch

66. Solar panel flow switch

67. Only sanitary water

68. Sanitary water heaters overload

69. Sanitary water pump overload

70. Sanitary water second set point

71. Phase sequence alarm

72. Sanitary water priority

73. Free cooling water pump flow switch

Digital Output (relay) Configuration RL1- RL14

Parameter involved: CF54= Configuration RL1…CF67= Configuration RL14

0. Not enabled

1. Alarm

2. Evaporator water pump / Supply fan

3. Support water pump of the evaporator

4. Anti-freeze heater / integration heating / boiler circuit 1

5. Anti-freeze heater / integration heating / boiler circuit 2

6. Water pump of the condenser recovery circuit

7. Support water pump of the condenser recovery circuit

8. 4-way valve for chiller / heat pump inversion of the circuit 1

9. 4-way valve for chiller / heat pump inversion of the circuit 2

10. 1° condenser fan step ON/OFF control of the circuit 1

11. 2° condenser fan step ON/OFF control of the circuit 1

12. 3° condenser fan step ON/OFF control of the circuit 1

13. 4° condenser fan step ON/OFF control of the circuit 1

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14. 1° condenser fan step ON/OFF control of the circuit 2

15. 2° condenser fan step ON/OFF control of the circuit 2

16. 3° condenser fan step ON/OFF control of the circuit 2

17. 4° condenser fan step ON/OFF control of the circuit 2

18. Solenoid valve of the pump-down circuit 1

19. Solenoid valve of the pump-down circuit 2

20. Recovery valve circuit 1

21. Recovery valve circuit 2

22. Free cooling ON/OFF valve

23. Auxiliary output circuit 1

24. Auxiliary output circuit 2

25. Solenoid valve Intermittent for screw compressor 1

26. Solenoid valve Intermittent for screw compressor 2

27. Solenoid valve of the liquid injection for compressor 1

28. Solenoid valve of the liquid injection for compressor 2

29. Sanitary valve 1

30. Sanitary valve 2

31. Sanitary heater 1

32. Sanitary heater 2

33. Sanitary heater 3

34. Solar panel water pump

35. Solar panel valve

36. Sanitary water pump

37. Hybrid exchanger 1 circuit 1

38. Hybrid exchanger 2 circuit 1

39. Hybrid exchanger 1 circuit 2

40. Hybrid exchanger 2 circuit 2

41. Defrost status

42. Chiller status

43. Heat pump status

44. Sanitary water status

45. STD-By status

46. Solenoid water valve circuit 1

47. Solenoid water valve circuit 2

48. Direct start-up : compressor 1 relay PW start: relay PW 1 of the compressor 1 Star-delta start: relay line 1 of the compressor 1

49. PW start: relay PW 2 of the compressor 1 Star-delta start: relay linea 2 compressor 1

50. Star centre of the Star-delta start of the compressor 1

51. Capacity step valve 1 compressor 1

52. Capacity step valve 2 compressor 1

53. Capacity step valve 3 compressor 1

54. By-pass gas valve compressor 1start

55. Direct start: compressor 2 start

PW start: relay 1 of the compressor 2

Star-delta start: relay line 1 of the compressor 2

56. PW start: relay PW 2 of the compressor 2 Star-delta start: relay line 2 of the compressor 2

57. Star centre of the Star-delta start of the compressor 2

58. Capacity step valve 1 compressor 2

59. Capacity step valve 2 compressor 2

60. Capacity step valve 3 compressor 2

61. By-pass gas valve compressor 2 start

62. Direct start: compressor 3 relay PW start: relay PW 1 of the compressor3 Star-delta start: relay line 1 of the compressor 3

63. PW start: relay PW 2 of the compressor 3 Star-delta start: relay line 1 of the compressor 3

64. Star centre of the Star-delta start of the compressor 3

65. Capacity step valve 1 compressor 3

66. Capacity step valve 2 compressor 3

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67. Capacity step valve 3 compressor 3

68. By-pass gas valve compressor 3 start

69. Direct start: compressor 4 relay PW start: PW 1 of the compressor 4 Star-delta start: relay line 1 of the compressor 4

70. PW start: relay PW 2 of the compressor 4 Star-delta start: relay line 1 of the compressor 4

71. Star centre of the Star-delta start of the compressor 4

72. Capacity step valve 1 of the compressor 4

73. Capacity step valve 2 of the compressor 4

74. Capacity step valve 3 of the compressor 4

75. By-pass gas valve compressor 4 start

76. Compressor 5 relay

77. Compressor 6 relay

Condenser proportional control configuration (2 outputs)

Proportional outputs used to configure a proportional output signal to condenser fan control

Parameters involved: CF68 = Condenser control configuration for circuit 1 CF69 = Condenser control configuration for circuit 2

0= 0 ÷ 10Vdc (for external mono or three-phase fan control board) 1= 4÷20mA (for external mono or three-phase fan control board) 2= PWM (only for external mono-phase fan control board with cut phase control)

Proportional output configuration 0 ÷ 10 Vdc (4 outputs)

Parameters involved: CF70 = Proportional output 1 configuration CF71 = Proportional output 2 configuration CF72 = Proportional output 3 configuration CF73 = Proportional output 4 configuration

0 Not enabled 1 Modulated evaporator water pump 2 Modulated Free cooling valve

3 not used

4 Auxiliary output 0÷10V n° 1 5 Auxiliary output 0÷10V n° 2 6 Proportional output for modulating compressor 1 7 Proportional output for modulating compressor 2 After the read-out number 4 the display goes from the label “o 1” to “c47 (see input/output polarity), that allow to configure the output as digital output to control an external relay.

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8. PROGRAMMING WITH THE “HOT KEY 64”

Download: how to program an instrument with a programmed “Hot Key”

1. Turn off the instrument supply

2. Insert the hot key.

3. Turn on the power supply.

4. Immediately the parameters are downloaded.

During the download the regulation is locked and the top display shows the “doL” blinking label. At the end of the download will appear:

“End” if the programming procedure is completely OK, after 30seconds the regulation starts automatically. “Err” if the programming procedure has found an error and the parameter have not been transferred. In this

case turn off and then on the instrument supply to repeat the operation or remove the hot key, with power supply off, to restart the regulation.

Upload: How to program a “Hot Key” with the parameters of the instrument

1. Turn on the power supply.

2. Insert the hot key.

3. Enter the function Menu.

4. Select the UPL function (on the bottom display).

5. Push SET key and immediately the instrument starts transfer the parameters into the Hot key.

During the upload the regulation is locked and the top display shows the “UPL” blinking label. At the end of the UPLOAD will appear:

Repeat the procedure. To exit the UPL function push the MENU key or wait the time-out (15 sec).

9. PROGRAMMING USING THE KEYBOARD

Through the instrument keyboard it is possible to enter the programming. In all the three accessible levels the user can show and modify both value and visibility of the parameters. To ensure an easy navigation through the different levels the common parameters have been named and grouped under a family name. The three levels of programming:

 Pr1 User level  Pr2 Maintenance level  Pr3 OEM level

Password default values

 Password level Pr1 = 1  Password level Pr2 = 2  Password level Pr3 = 3

Under the function Menu (to reset the Alarm Log or the Compressor Overload) the password is 0 (see parameter AL46) Each password can be changed, the range is from 0 to 999.

Each parameter has two level: visibility and modify. Therefore it can be configured as follow:

 The parameter can be showed and changed.  The parameter can be showed but not changed.

Enter the Pr1 - Pr2 - Pr3 programming levels

Pr1 LEVEL:

Push SET + DOWN together for 3 seconds, the top display shows the PAS label and the bottom display shows the Pr1 label. The leds cir1/cir2 are blinking (up and down leds) to inform that you now are in PR1 programming level.

Pr2 LEVEL:

From the Pr1 level push the UP key for 2 seconds and the bottom display will show Pr2. The top display still shows PAS.

Pr3 LEVEL:

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From the Pr2 level push the UP key for 2 seconds and the bottom display will show Pr3. The top display still shows PAS. After selecting the level push the SET key and the top display will show the 0 blinking value where to insert the password . Set the password level using the UP and DOWN keys then confirm with SET key. Dependening on the password value there will be the different level access, if the password is wrong the instrument shows the password value again.

ATTENTION:

For all the programming levels Pr1,2,3: the CF family (or configuration parameters) can not be changed if the unit is running in chiller, heat pump. The user can check the leds #1 and #2 and if they are blinking it is not possible to change this parameters but it is necessary to set the unit in stand-by and then enter the programming again. During the defrost the dF family can’t be programmed.

How to change a parameter value

Enter the programming

1. Push the SET + DOWN keys together for 3 seconds;

2. Select the parameter label with up and down keys;

3. Push SET to enter the parameter value;

4. Change the value with UP or DOWN keys;

5. Push “SET” to confirm, after some seconds the display shows the next parameter;

6. Exit: Push SET + UP together when a parameter label is displayed or wait 15seconds without pushing a key.

NOTE: a new parameter value is confirmed also after the 15 seconds of timeout is expired (without pushing SET key to confirm).

Change the Password value

Pr1 LEVEL

Remember that it is necessary to know the old password value.

1) Enter the Pr1 level

2) Select a parameter family.

3) Inside the family select the “Pr1 - 1”, Pr1 on the bottom display, the current password value 1 on the top display. Push the SET key to change the value that now is blinking.

4) Use the UP or DOWN key to insert the NEW PASSWORD value, then push SET to confirm the new value.

5) The top display blinks for some seconds and then shows the next parameter.

6) Exit the programming pushing SET + UP together or wait the timeout.

Pr2 LEVEL

Remember that it is necessary to know the old password value.

1. Enter the Pr2 level

2. Select a parameter family.

3. Inside the family select the “Pr2 - 2”, Pr2 on the bottom display, the current password value 2 on the top display. Push the SET key to change the value that now is blinking.

4. Use the UP or DOWN key to insert the NEW PASSWORD value, then push SET to confirm the new value.

5. The top display blinks for some seconds and then shows the next parameter

6. Exit the programming pushing SET + UP together or wait the timeout.

Inside the Pr2 level it is possible to change also the Pr1 password.

Pr3 LEVEL

Remember that it is necessary to know the old password value.

1. Enter the Pr3 level

2. Select a parameter family.

3. Inside the family select the “Pr3 - 3”, Pr3 on the bottom display, the current password value “3” on the top display. Push the SET key to change the value that now is blinking.

4. Use the UP or DOWN key to insert the NEW PASSWORD value, then push SET to confirm the new value.

5. The top display blinks for some seconds and then shows the next parameter

6. Exit the programming pushing SET + UP together or wait the timeout.

Inside the Pr3 level it is possible to change also the Pr1 and Pr2 passwords.

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Enter the programming level Pr1

Enter the Pr1 “User level ”:

1. Push the SET + DOWN keys together for 3 seconds. The top display shows PAS while the bottom display shows Pr1 labels.

2. Push SET key and the top display shows a blinking 0, with UP or DOWN insert the Pr1 password. Push SET and, if the value is correct, top display will show the first family of parameters “ALL”. Otherwise set the password again.

3. Select a parameter family with DOWN or UP keys.

4. Push SET to enter, the bottom display shows the first available parameter label while the top display shows its value.

The user can shows and modify all the parameters belonging to this family.

Parameter status, leds and bottom display in Pr1

 If the selected parameter can not be changed the leds 1 and 2 are blinking.  In Pr1 level the user can not see and change any parameter of Pr2 and Pr3.  The MENU key allows to exit from a family to reselect another without exit the Pr1 level.  To exit completely the programming push SET + UP.

Enter the programming level Pr2

Enter the Pr2 “maintenance level ”:

1. Push the SET + DOWN keys together for 3 seconds. The top display shows PAS while the bottom display shows Pr1 labels.

2. Push UP key for 2 seconds and the top display will show Pr2.

3. Push SET key and the top display shows a blinking 0, with UP or DOWN insert the Pr2 password. Push SET and, if the value is correct, top display will show the first family of parameters “ALL”. Otherwise set the password again.

4. Select a parameter family with DOWN or UP keys.

5. Push SET to enter, the bottom display shows the first available parameter label while the top display shows its value.

The user can shows and modify all the paramters belonging to this family.

Parameter status, leds and bottom display in Pr2

 Leds 1 / 2 are blinking: the parameter can not be changed.  All the leds are off: the parameter ca not be seen in Pr1 level.  Led 3 is on: the parameter can be seen in Pr1 level.  Leds 1 / 2 are blinking and led 3 is on: the parameter can be showed and changed in Pr2, showed but

not changed in Pr1.

 Leds 1 / 2 / 3 are blinking: the parameter can be showed and changed in Pr2 and in Pr21.  In Pr2 level the user can not see and change any parameter of Pr3 level.

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 The MENU key allows to exit from a family to reselect another without exit the Pr2 level.  The MENU key allows to pass to Pr1 starting from a family label.  To exit completely the programming push SET + UP.

Enter the programming level Pr3

Enter the Pr3 “OEM level ”:

1. Push the SET + DOWN keys together for 3 seconds. The top display shows PAS while the bottom display shows Pr1 labels.

2. Push UP key for 2 seconds and the top display will show Pr2.

1. Push UP key again for 2 seconds and the top display will show Pr3

3. Push SET key and the top display shows a blinking 0, with UP or DOWN insert the Pr3 password. Push SET and, if the value is correct, top display will show the first family of parameters “ALL”. Otherwise set the password again.

4. Select a parameter family with DOWN or UP keys.

5. Push SET to enter, the bottom display shows the first available parameter label while the top display shows its value.

The user can shows and modify all the paramters belonging to this family.

Parameter status, leds and bottom display in Pr3

 Leds 1 / 2 are blinking: the parameter can not be changed.  All the leds are off: the parameter is available only in Pr3.  Led 4 on: the parameter can be changed also in Pr2.  Led 4 blinking: the parameter is visible also in Pr2 .  Leds 3 / 4 on: the parameter is available in Pr2 and in Pr1.  Leds 3 / 4 blinking: the parameter is visible in Pr1 and in Pr2.  The MENU key allows to exit from a family to reselect another without exit the Pr2 level.  The MENU key allows to pass to Pr1 starting from a family label.  To exit completely the programming push SET + UP.

Move a parameter level from Pr2 to Pr1

Enter Pr2 programming level

Select the parameter and if the led # 3 is off: the parameter is available only in Pr2.

To show the parameter also in Pr1:

1. Keep pushed SET key;

2. Push 1 time the DOWN key and the led 3 should be on, the parameter is now available in Pr1. To hide the parameter in Pr1:

1. Keep pushed SET key;

2. Push 1 time the DOWN key and the led 3 should be off, the parameter is now removed from Pr1.

Move a parameter from Pr3 to Pr2 to Pr1

Enter Pr3 programming level, here the parameter are all visible:

Select the parameter, if all the leds are off the parameter is available only in Pr3.

To show the parameter also in Pr2 and Pr1:

1. Keep pushed SET key;

2. Push 1 time the DOWN key and the leds 3 and 4 should be on, the parameter is now available also in Pr2 / Pr1. To show the parameter only in Pr2:

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1. Keep pushed SET key;

2. Push 1 time the DOWN key and the leds 3 is off, the parameter is now available also in Pr2. To show the parameter only in Pr3:

1. Keep pushed SET key

2. Push 1 time the DOWN key and the leds 3 and 4 are off, the parameter is now available only in Pr3.

Visibility and Parameter value locked

To set the only visibility and lock the parameter value it is necessary enter Pr3 programming level. Pr1 PARAMETER VISIBILITY

Enter the Pr3 level

1. Select the parameter;

2. Keep pushed the SET key;

3. Push 1 time the MENU key and the led 3 change from on to blinking: the parameter is visible in Pr1 but can’t be changed.

Pr2 PARAMETER VISIBILITY

Enter the Pr3 level

1. Select the parameter;

2. Keep pushed the SET key;

3. Push 1 time the MENU key and the led 4 change from on to blinking the parameter is visible in Pr2 but can’t be changed.

Leds 3 / 4 blinking: the parameter is visible in Pr1 and in Pr2 but in those levels now they can’t be changed.

TO SET THE ORIGINAL TAG FOR THE PARAMETER Pr1 / Pr2

1. Keep pushed the SET key;

2. Push one time the MENU key, the leds 3 / 4 turn on, the parameter can be seen and modified in Pr1 and Pr2.

Programming: digital input and output polarity

The parameters that allow to configure different options such as:

1. Digital inputs

2. Digital outputs (relay)

3. Proportional output configured as ON/OFF

4. Analogue input configured as digital input

have a different parameter description that allows to configure the operating mode and the corresponding polarity.

Example of programming:

The bottom display shows the parameter label (CF36) Digital input ID1 configuration; Note that the top display shows “c” or “o” before the configuration number.

The selection 7 for the digital input ID1 (CF36) means that it is the “high pressure switch of circuit 1”. The label “o” means that the digital input is active for open contact.

Otherwise if the selection is 7 for the digital input ID1 (CF36) = “high pressure switch of circuit 1”. The label “c” means that the digital input is active for closed contact.

Change the polarity of the digital Inputs-Outputs

Enter the programming:

1. Select a parameter with digital input/output value, The top display shows the label o before the configuration number while the bottom display shows the parameter label.

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2. Push SET key: the o label and the configuration number are blinking, use the UP or DOWN key and select the proper polarity ( o / c ) of the function, then push SET key to confirm it all.

3. The top display blinks for some seconds and then it will shows the next parameter.

4. To exit the programming push SET + UP together or wait the timeout (15seconds).

10. CHILLER / HEAT PUMP SELECTION

Select the Chiller or the Heat pump mode

The CF79 parameter allows to select and enable the running mode:

Par. CF79 = 0: Through keyboard The user can start and stop the unit using the keys of the front panel.

Par. CF79 = 1: Through digital input programmed to start/stop the unit from remote control.

 This selection is enabled if there is one digital input configured as start/stop from remote (remote chiller /

heat pump). I non of the digital input are configure the unit remains in stand–by.

 The “open” status of the input forces the chiller running mode.  The “closed” status of the input forces the heat pump running mode.  The keyboard selection is disabled.

 The key on the front panel can start/stop the unit only with the digital input selection

Par. CF79 =2: Automatic selection of the Chiller - Heat Pump through analogue input The analogue input selection or change over function overrides the digital input C-HP function. If the external air temperature are within the CF81 differential, the user can change the running mode from the keyboard. If the unit is running with CF79 = 1 or CF79=2, and it is requested a running mode change, the controller turns off all the outputs, starts a fixed delay time signalled by the chiller or heat pump blinking led. This blinking led indicates which running mode will be activated after the compressor delay time protection.

Change Over

To change the running status the following condition must be respected otherwise the unit remains in stand by:

1. CF02=3 (heat pump selected)

2. CF79=2 and a NTC probe configured as NTC external air temperature for dynamic setpoint/ boiler / change over

3. This probe is working properly

Parameters involved with the change over function: CF80 Change over Setpoint. If the analogue input control (from probe) function is enabled, it represents the limit temperature of the probe value under which the unit runs the Heat Pump mode. CF81 Change over Differential. If the analogue input control (from probe) function is enabled, it represents the limit differential temperature of the probe value to restart in the Chiller mode. For external air temperature within CF81 the user can manually change the status from keyboard.

GRAPH: AUTOMATIC CHANGE OVER

Keyboard selection

CF78 = 0: pushing key the unit starts in chiller, pushing key the unit starts in heat pump CF78 = 1: pushing key the unit starts in heat pump, pushing key the unit starts in chiller

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Analog input selection

CF78 = 0 NTC, External air temperature probe > CF80+ CF81 the unit starts in chiller, NTC, External air

temperature probe < CF80 the unit starts in heat pump. CF78 = 1 NTC, External air temperature probe > CF80+ CF81 the unit starts in chiller, NTC, External air

temperature probe < CF80 the unit starts in heat pump.

11. HOW TO SWITCH ON / SWITCH OFF THE UNIT

SWITCH ON / SWITCH OFF THE ICHILL BY KEYBOARD

Push and release the key allows to start in chiller mode if CF78 =0, in heat pump if CF78 =1. When the unit is running the corresponding led is on. INPORTANT: To change from chiller to heat pump and viceversa the unit must be set in stand-by before continuing.

Push and release the key allows to start in heat pump mode if CF78 =0, in chiller if CF78 =1er. When the unit is running the corresponding led is on. INPORTANT: To change from chiller to heat pump and viceversa the unit must be set in stand-by before continuing.

STAND- BY ( OR UNIT OFF, NOT RUNNING)

The unit is considered in stand by when the leds and are both off. The stand-by is reached each time the Chiller or the Heat Pump are turned off. During the stand by the user can:

 Show all the probe measurements  Detect and reset the alarm events.

SWITCH ON / SWITCH OFF THE ICHILL DIGITAL INPUT

Turn on or off the unit from digital input

Set the digital input as remote ON/OFF, depending on the input polarity it can generate the unit off

 The digital input overrides the keyboard command.  The keyboard can run only if the digital input is not active.  When the digital input is not active the instrument restore its status (had before the digital input

activation).

12. SWITCH ON / SWITCH OFF THE CONDENSING UNIT BY DIGITAL

INPUT

DIGITAL INPUT CONFIGURED AS REGULATION REQUEST

Unit configured as condensing unit CF03 = 1. Digital input thermoregulation request (condensing unit)

 With contact OFF unit on stand-by , the top display shows OFF  With contact ON unit on stand-by , the top display shows On

With active contact select the chiller mode from the keyboard (the top display shows OnC) or heat pump (the top display shows OnH), with the funcioning mode active the step is activated, the others, if availables, will be requested by configured digital input as resources on circuits.

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With active contact if the unit is being switched off by keyboard it can be switched on by keyboard. If the unit is being switched off by keyboard, in order to switch on the unit from digital input it must be deactivated and activated.

DIGITAL INPUT CONFIGURED AS CHILLER REQUEST

Unit configured as condensing unit CF03 = 1 Digital input chiller request (condensing unit)

 With contact OFF unit on stand-by , the top display shows OFF  With contact ON unit on stand-by , the top display shows OnC

With active contact unit on chiller mode is activated also a step, the others, if availables, will be requested by configured digital input as as resources on circuits. With active contact if the unit is being switched off by keyboard it can be switched on by keyboard. If the unit is being switched off by keyboard, in order to switch on the unit from digital input it must be deactivated and activated.

DIGITAL INPUT CONFIGURATED AS HEAT PUMP REQUEST

Unit configured as condensing unit CF03 = 1 Digital input heat pump request (condensing unit)

 With contact OFF unit on stand-by , the top display shows OFF  With contact ON unit on stand-by , the top display shows OnH

13. DISPLAY LAYOUT

As default, in normal condition, the display shows the circuit 1 information. The displayed circuit is indicated from the corresponding led Cir1 on (UP key), or Cir2 (circuit 2, DOWN key).

How to show the measurement list

With the led Cir1 on, push UP or Down keys to display the labels of the information of the circuit 1. With the led Cir2 on, push UP or Down keys to display the labels of the information of the circuit 2. Each measurement is defined by a label that indicates which if it is a pressure a temperature or a time.

How to read the circuit 1 or 2 probe temperature or pressure

To swap between the probe value of the two circuits push SET button; the led “cir1” or “cir2” is lighted to indicate the probe of the circuit 1 or circuit 2.

Example in fig.1 Led cir1 is on: the top display shows the value of the output evaporator temperature ( 7.8°C) of the circuit 1, The bottom display shows Out 1. Push SET key to swap to the circuit 2. Fig2 Led cir2 is on: the top display shows the value of the output evaporator temperature ( 7.9°C) of the circuit 2,

the bottom display shows Out 2.

Fig.1

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Fig.2

14. DISPLAY CONFIGURATION

The dP family of parameters allows to set a custom display read-out. The user can change the default readout (both for instrument and remote terminals) of the measurements depending on the application.

Top Display

Bottom display

Default read - out of the top display

To set the default value displayed on the top display:

1. Set the parameter dP03 = 0, it means configurable;

2. Select the dP01 parameter into the range 0..14 descripted here below:

PARAMETER

VALUE

DESCRIPTION

CORRESPONDING

LABEL

dP01=0

No label

dP01=1

temperature probe of the evaporator water inlet

Ein

dP01=2

temperature probe of the evaporator water outlet 1 and 2

Out1

circuit 1

Out2 circuit 2

dP01=3

temperature probe of the uscita common evaporator water outlet

Eout

dP01=4

temperature probe of the condenser water inlet

CIn1

circuit 1

CIn2 circuit 2

dP01=5

temperature probe of the common condenser water inlet

Cin

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dP01=6

temperature probe of the condenser water outlet

Cou1

circuit 1

Cou2 circuit 2

dP01=7

temperature probe of the common condenser water outlet

Cout

dP01=8

temperature probe of the dynamic external air setpoint

dP01=9

temperature probe of the free cooling water inlet

FCIn

dP01=10

temperature probe of the free cooling external air value

FCEt

dP01=11

temperature probe of the remote terminal 1

trt1

dP01=12

temperature probe of the remote terminal 2

trt2

dP01=13

temperature probe of the combined defrost

dEF1

circuit 1

dEF2 circuit 2

dP01=14

sanitary water temperature 1

San1

dP01=1

sanitary water temperature 2

San2

dP01=1

solar panel water temperature

SoLE

dP01=17

temperature probe of the condenser

Cdt1

circuit 1

Cdt2 circuit 2

Default read - out of the bottom display

To set the default value displayed on the bottom display:

1. Set the parameter dP03 = 0, it means configurable;

2. Select the dP02 parameter into the range 0..17 descripted here below:

PARAMETER

VALUE

DESCRIPTION

CORRESPONDING

LABEL

dP02=0

No label

dP02=1

temperature probe of the evaporator water inlet

Ein

dP02=2

temperature probe of the evaporator water outlet 1 and 2

Out1

circuit 1

Out2 circuit 2

dP02=3

temperature probe of the common evaporator water outlet

Eout

dP02=4

temperature probe of the condenser water inlet

CIn1

circuit 1

CIn2 circuit 2

dP02=5

temperature probe of the common condenser water inlet

Cin

dP02=6

temperature probe of the condenser water outlet

Cou1

circuit 1

Cou2 circuit 2

dP01=7

temperature probe of the common condenser water outlet

Cout

dP02=8

temperature probe of the dynamic external air setpoint

dP02=9

temperature probe of the free cooling water inlet

FCIn

dP02=10

temperature probe of the free cooling external air value

FCEt

dP02=11

temperature probe of the remote terminal 1

trt1

dP02=12

temperature probe of the remote terminal 2

trt2

dP02=13

temperature probe of the combined defrost

dEF1

circuit 1

dEF2 circuit 2

dP02=14

sanitary water temperature 1

San1

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dP02=15

sanitary water temperature 2

San2

dP02=16

solar panel water temperature

SoLE

dP02=17

temperature probe of the condenser

Cdt1

circuit 1

Cdt2 circuit 2

dP02=18

pressure probe of the condenser 4÷20mA - 0.5V

Cdt1

circuit 1

Cdt2 circuit 2

dP02=19

pressure probe of the evaporator 4÷20mA - 0.5V

LP1

circuit 1

LP2 circuit 2

dP02=20

pressure probe of the compressor oil differential

OIL

comp 1

OIL2 comp 2

dP02=21

Clock

Forced read - out of the top and bottom display

To force the display read-out:

1. Set the dP03 parameter not equal to 0

2. Select the value range 1..3

These configurations allow to show together two temperatures or two pressures of the same circuit in order to have an easier reading of the measurements: Par. dP03 = 1

Top display: for both the circuits 1,2:  Evaporator water inlet, with the Ein label. Bottom display: circuit 1:  Evaporator 1 water outlet, with the label OuT1 Bottom display: circuit 2:

 Evaporator 2 water outlet, with the label OuT2. Par. dP03 = 2

Top display of the circuit 1:  Condenser 1 water inlet temperature with the label CIn1 Bottom display of the circuit 1  Condenser 1water outlet with the label COu1. Top display of the circuit 2: Condenser 2 water inlet temperature with the label Cin2 Bottom display of the circuit 2

 Condenser 2water outlet with the label Cou2. Par. dP03 = 3

Top display of the circuit 1:  Condenser probe temperature Cdt1 / pressure CdP1 Bottom display of the circuit 1  Evaporator pressure probe LP1 Top display of the circuit 2: Condenser probe temperature Cdt2 / pressure CdP2 Bottom display of the circuit 2 Evaporator pressure probe LP2

Default display read - out of the remote panels VI620S

If the parameter dP04 = 0 the upper display of the remote panels #1 and #2 depends on the parameter values dP01 – dP02 – dP03; to show the temperature detected by the internal probe of the remote panel accessing the function menu under the function trEm. If the parameter dP04 = 1 the upper display of the remote panels #1 and #2 show their internal NTC sensor (ambient temperature); to show the same temperature it is possible to eccess the function menu under the function trEm.

15. DISPLAY INFORMATION

Show the Set Point value

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Push and release the SET key, the leds of the circuits are off and the set value is displayed. In stand-by the bottom display shows SetC (set chiller), by pushing SET again the next label is SetH (set heat pump ). If the unit is running the only set displayed is related to the running mode.

Modify the Set Point

1) Push SET key for at least 3 seconds: the leds of the circuits are off and the set value is blinking.

2) Use the UP or DOWN key to modify the setpoint.

3) Push SET to confirm or wait the timeout (15seconds).

Show the active SetPoint during Energy Saving or Dynamic Setpoint

If the unit is running in chiller or HP, the Energy Saving or the Dinamic Setpoint activity is signalled by the blinking led of the SET button.

Chiller mode: push SET one time, the bottom display shows the SEtC (set chiller) while the top display shows the set value. Only if the Energy saving or the Dynamic Setpoint are active, pushing another time the SET key, the bottom display shows “SEtr” (real setpoint), and the top display shows the setpoint that the unit is really using for the thermoregulation. Chiller mode: push SET one time, the bottom display shows the SEtH (set Heat pump) while the top display shows the set value. Only if the Energy saving or the Dynamic Setpoint are active, pushing another time the SET key, the bottom display shows “SEtr” (real setpoint), and the top diplay shows the setpoint that the unit is really using for the thermoregulation.

ATTENTION

The SEtr label appears only if the Energy saving or the Dynamic Setpoint are active. To modify the working setpoint it is necessary the setpoint values is displayed on both the display (temperature / temperature or temperature / pressure o pressure/ pressure) without any identification label, otherwise the SET key swaps to the circuit information.

Display in Remote Off

From digital input configured as remote ON/OFF: the active input sets the unit in OFF (even when the unit is a ). The top display shows “OFF ”, the led of the decimal point is blinking.

Display in Condensing unit configuration

The top display shows “ON” for active input and “OFF” for not active input. If the unit is running in Chiller the top display shows OnC otherwise OnH for heat pump. The configuration for condensing unit, as for chiller or HP, allows to show through the top and the bottom display all the detected input measurements and alarms.

16. FUNCTION MENU “ M” KEY

The function Menu is composed of the following items:

1) Show and reset the alarms ALrM

2) Compressor overload alarm reset COtr

3) Show and reset the alarm log ALOG

4) Upload the parameter into the Hot Key UPL

5) Enable – disable one or the two circuits CrEn

6) Enable – disable one of the compressors COEn

7) Display the compressor discharge temperature COdt

8) Show and reset the number of compressor running hour Hour

9) Show and reset the number of compressor starts-up COSn

10) Show the condensing fan speed percentage of the proportional output Cond

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11) Show the percentage of the proportional output 0 ÷ 10 Vdc Pout

12) Time counting to next defrost cycle, under heat pump mode, dF

13) Show the probe temperatures that enabled to control the auxiliary output uS

14) Read temperature of solar panel SoL

15) Read temperature of the Free cooling SoL

16) Show the probe the temperature of the remote panels trEM

With the UP or DOWN keys move inside the label list.

Alarm list: show and reset

ALrM FUNCTION

Enter the function MENU pushing M key one time

1) Use the UP or DOWN to select the AlrM label

2) Push SET key (Nothing happens if there are no active alarm events)

3) Bottom display: alarm label code. Top display: label rSt to reset or NO if it is not possible.

4) Use the UP or DOWN to scroll the alarm list.

5) Pushing SET when the rSt label is displayed the corresponding alarm will be reset, then the display shows next alarm in the list, pushing SET again the alarm is reset and the display shows next alarm etc. Nothing happens by pushing SET when the label NO is displayed, in this case push UP or DOWN to move to another alarm label.

6) To exit the ALrM reset function push MENU one time or wait the timeout.

Compressor overload alarm reset

16.1.1 Compressor overload alarm; manual reset

If the number of compressor overload alarm is lower than the parameter AL20, the alarm is showed in the Alrm function. Labels involved:

CO1r = compressor 1 overload reset … CO6r = compressor 6 overload reset.

MANUAL ALARM RESET PROCEDURE Enter Menu function

1. Use UP or DOWN key and select the Alrm on the bottom display.

2. Push SET one time, if there are active alarms the bottom display shows the alarm label eg. C1tr (for compressor 1) while the top display shows the label rSt to reset the alarm or NO if the alarm can not be reset. Use the UP or DOWN keys to scroll all the alrm list (nothing happens by pushing SET when the label NO is displayed).

3. Pushing SET when the rSt label is displayed; the corresponding alarm will be reset

4. To exit the Alrm function push MENU or wait the timeout.

5. Repeat operation 1 – 4 to reset the other alarms.

16.1.2 Compressor overload alarm; manual reset with password

If the number of compressor overload alarm is bigger than the parameter AL20, the alarm is showed in the COtr function.

Labels involved in Cotr function:

CO1r = compressor 1 overload reset … CO6r = compressor 6 overload reset

MANUAL ALARM RESET PROCEDURE Enter Menu function

1. Use UP or DOWN key and select the COtr on the bottom display.

2. Push SET one time, if there are active alarms the bottom display shows the alarm label eg. CO1r (for compressor 1) while the top display shows the label rSt to reset the alarm or NO if the alarm can not be reset. Use the UP or DOWN keys to scroll all the alrm list.

3. Nothing happens by pushing SET when the label NO is displayed.

4. Pushing SET when the rSt label is displayed the corresponding alarm will be reset after the password: bottom display = ArSt while the top display = PAS.

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5. Push SET and the top display blinks 0 while the bottom shows PAS. Insert the password using UP or DOWN key (see AL parameter family). If the password is OK the ArSt blinks for per 3seconds, if the password value is not correct the top display blinks 0 while the bottom shows PAS. If within 5 seconds no value is inserted the display label come back to CO1r function.

6. To exit the COtr function push MENU or wait the timeout.

7. Repeat operation 1 – 5 to reset the other alarms.

Compressor overload password

The default value is 0 to change this value enter Pr3 level under the AL parameter family

Alarm log list

ALOG FUNCTION TO SEE THE ALARM LOG

The function and the alarm codes are visible only if there are alarm events. If many events are active at the same time the list displayed by increasing order. Enter the function Menu

1. Select ALOG

2. Push SET one time. Nothing happens if there are no active alarm events.

3. The bottom display shows the alarm label, the top display shows the a number in the range 00 to 99.

4. Use the UP or DOWN keys to scroll the list.

5. To exit the ALOG function push MENU or wait the timeout.

Erase the Alarm log list

ALOG FUNCTION TO ERASE THE LOG LIST

1. Enter the function Menu.

2. Use the UP or DOWN keys to select ALOG on the bottom display.

3. Push on e time the SET key.

4. Within the ALOG function select with UP or DOWN keys, the ArSt label on the bottom display while the top display shows PAS.

5. Push SET: the bottom display shows PAS and the top display a blinking 0.

6. Insert the password (See parameter family AL)

7. If the password is OK the label ArST blinks for 5 seconds then the display returns to normal condition read-out (probes).

8. If the password is not correct the display shows PAS again. in any case is possible to scroll the list with UP or DOWN

9. To exit push the M key one time or wait the timeout.

Password value of the alarm list

The default value is 0 to change this value enter Pr3 level under the AL parameter family. THE ALARM LIST CONTAINS 100 EVENTS IN A FIFO STRUCTURE. WHEN THE MEMORY IS FULL

ANY NEW ALARM WILL ERASE THE OLDEST.

Disable – enable a single circuit

Through the instruments keyboard is possible to completely disable a single circuit for maintenance or to use just a cooling part of of the unit.

CrEn FUNCTION enables – disables a circuit from keyboard. Label involved with CrEn function: Cr1E = circuit 1, Cr2E = circuit 2

DISABLE A CIRCUIT

Enter the function Menu

1. Use UP or DOWN keys to select CrEn on the bottom display

2. Push SET key: the bottom display = Cr1E, top display = En.

3. Select the circuit 1 or 2 with UP or DOWN (Cr1E or Cr2E).

4. Push SET key for 3 seconds when one of the two Cr1E, Cr2E label are displayed. The top display shows the En blinking label, use the UP or DOWN to change in diS (Disabled) or En (Enabled). then push SET key to confirm the new selection. The display shows next circuit status.

5. To exit the CrEn function push MENU key or wait the timeout.

Read-out of a Circuit Not enabled

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If one circuit is disabled the bottom display shows diS alternated with the label name of the measurement selected. Circuit 1 = diS the bottom display shows b1dS = circuit 1 disabled. Circuit 2 = diS the bottom display shows b2dS = circuit 2 disabled. The b2dS label appears only if the 2nd circuit is configured,

Enable or disable a single compressor

Through the instruments keyboard is possible to disable a single compressor for maintenance or to lock it when malfunctioning . COEn FUNCTION compressors running status. Label involved in COEn function: CO1E = Compressor 1 status… CO6E = Compressor 6 status The COEn function uses only the compressors configured by the corresponding output parameters.

Enter the function Menu

1. Use the UP or DOWN keys to select COEn.

2. Push SET key: bottom display = CO1E, top display = En

3. Select the compressor with UP or DOWN: CO2E - CO3E - CO4E - CO5E - CO6E if available.

4. Push SET for 3 seconds when the label corresponds to the compressor to disable: CO1E - CO2E CO3E - CO4E - CO5E - CO6E. The top display shows the blinking En label, use the UP or DOWN key and change to diS (Compressor disabled) or En (compressor enabled) then push SET to confirm, the display shows next item.

5. To exit the COEn function push MENU key or wait the timeout.

Read-out of a compressor Not enabled

During the normal running condition a disabled compressor is displayed with a blinking label alternated with the measurement value of the display. If the compressor is disabled these the corresponding labels: C1dS = compressor 1 disabled…C6dS = compressor 6 disabled The label C1dS…C6dS are available only if the corresponding compressor is configured.

Read-out of the compressor discharge temperature probe

The menu function allows to read-out the compressor temperature probes. COdt FUNCTION shows the discharge temperatures Label involved in Codt function: CO1t Compressor 1 discharge temperature… CO6t Compressor 6 discharge temperature

1. Use the UP or DOWN keys to select COdt

2. Push SET key: bottom display = CO1t, top display = temperature value of that probe.

3. Use the UP or DOWN kys to scroll the list: CO1t or CO2t or CO3t or CO4t or CO5t or CO6t

4. To exit the COEn function push MENU key or wait the timeout

ATTENZIONE

The labels Codt are available only if the corresponding compressor probe is configured. The display resolution is 0.1°C until the read-out is 99.9, over 100°C it is 1°C.

Read-out of the running hours

This menu allows to shows all the time running hours of the compressors, supply fan and pumps. Hour FUNCTION to show the controlled load consumption Label involved in the Hour function:

CO1H Compressor 1 running hours .. CO6H Compressor 6 running hours. EP1H Evaporator water pump or Supply fan running hours (air/air) EP2H Support evaporator water pump running hours CP1H Condenser water pump running hours CP2H Support condenser water pump running hours

The labels are displayed only if the corresponding output is present and configured. The running hours is displayed on the top display, the resolution is x 10 hours (eg 2 means 20 hours, 20 means 200hours)

Enter the function Menu

1. Use the UP or DOWN keys to select Hour

2. Push SET key: bottom display = above labels, top display = hours x10. The time is on.

3. Use the UP or DOWN keys to scroll the list.

4. To exit the Hour function push MENU key or wait the timeout

Reset the running hour

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Enter the function Menu

1. Within the Hour function select, with UP or DOWN, the interested label: CO1H, CO2H, CO3H, CO4H, CO6H, EP1H, EP2H, CP1H, CP2H.

2. Push the SET keys for 3seconds: the top display shows the running hours blinking value, then it shows 0 to confirm the reset. The next load label is automatically loaded.

To exit the Hour function push MENU key or wait the timeout

Read-out of the compressor starts-up

For each compressor is possible to show the number of starts-up. COSn FUNCTION: number of starts-up of the compressor Label involved in COSn function: C1S number of compressor 1 starts-up .. C6S number of compressor 6 starts-up The labels are displayed only if the corresponding output is present and configured The number of starts-up is displayed on the top display, the resolution is x 10 (eg 2 means 20 starts, 20 means 200starts)

Enter the function Menu

1. Use the UP or DOWN keys to select COSn.

2. Push SET one time: the label of the first load C1S is showed on the top display, the bottom display shows the number x10.

3. With UP or DOWN scroll the compressor list.

4. To exit the Hour function push MENU key or wait the timeout

Reset the starts-up number

Enter the function Menu

1. Within the Hour function select, with UP or DOWN, the interested label: CS1, CS2, CS3, CS4, CS6.

2. Push the SET keys for 3seconds: the top display shows the running hours blinking value, then it shows 0 to confirm the reset. The next load label is automatically loaded.

3. To exit the Hour function push MENU key or wait the timeout.

Read-out of the Proportional Output percentage of the condenser fan control

The proportional outputs of the two circuits, that control the fan speed, can be showed in the menu function. Cond FUNCTION selects the proportional output 1 and 2. Label involved in Cond function.

Cnd1 Proportional output status of the condenser fan of the circuit 1. Cnd2 Proportional output status of the condenser fan of the circuit 2.

TO SEE THE OUTPUT PERCENTAGE:

Enter the function menu

1. Use the UP or DOWN keys to select Cond.

2. Push SET key: the bottom display shows Cnd1, the top display shows the output percentage.

3. Use the UP or DOWN keys to select Cnd1 or Cnd2, the top display always shows the value, between 0% and 100%, of the proportional output of the selected circuit.

4. To exit the Hour function push MENU key or wait the timeout.

Read-out of the four proportional output

The four proportional outputs, 4..20ma or 0-10V, can be showed in the menu function. Pout FUNCTION selects the proportional outputs. Label involved in Cond function:

Pou1 Proportional output for dumper control or to drive the external relay 1 Pou2 Proportional output for dumper control or to drive the external relay 2 Pou3 Proportional output for dumper control or to drive the external relay 3 Pou4 Proportional output for dumper control or to drive the external relay 4

The labels are displayed only if the corresponding output is present and configured.

TO SEE THE FOUR OUTPUT PERCENTAGE:

Enter the function menu

1. Use the UP or DOWN keys to select Pout.

2. Push SET key: the bottom display shows Pou1, the top display shows the output percentage.

3. Use the UP or DOWN keys to select Pou1, Pou2, Pou3 or Pou4 the top display always shows the value, between 0% and 100%, of the proportional output of the selected circuit.

4. To exit the Hour function push MENU key or wait the timeout.

ATTENTION:

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If the proportional output Pou1 - Pou2 - Pou3 - Pou4 are configured to drive an external relay the display will show 0=relay off and 100=relay on.

Read-out of the time counting to the next defrost

The 2 times delay to next defrosts of the two circuits can be showed in the menu function. dF FUNCTION time to next defrost. Label involved in dF function:

dF1 delay time to next defrost of the circuit 1 dF2 delay time to next defrost of the circuit 2

The labels apperas on if the heat pump configuration is enabled. Enter the function menu :

1. Use the UP or DOWN keys to select dF

2. Push SET key: the dF1 label is showed on the top display, the bottom display shows the time delay to next defrost in minutes / seconds. The icon is on.

3. Use the UP or DOWN keys to select dF1 or dF2.

4. To exit the Hour function push MENU key or wait the timeout

Read-out of the probes configured to control Solar panel

Sol FUNCTION Label involved in Sol function: FCP1 Free cooling probe 1 temperature FCP2 Free cooling probe 2 temperature FCdF Free cooling differential FCrL Free cooling water pump status FCAn Free cooling analog output status

Read-out of the probes configured to control Free cooling

Sol FUNCTION Label involved in Sol function: SLPb Solar panel probe 1 temperature SSP2 Solar panel probe 2 temperature SSdi Solar panel differential SPMP Solar panel water pump status SLrL Solar panel valve status

Read-out of the probes configured to control an auxiliary output relay

The probe values, configured to control the auxiliary relay output, can be showed in the menu function. uS FUNCTION temperature/pressure value of the control probe for auxiliary output. Label involved in uS function:

uSt1 auxiliary probe value of the circuit 1 uSt2 auxiliary probe value of the circuit 2

Enter the function menu

1. Use the UP or DOWN keys to select uS.

2. Push SET key: the label uSt1 (temperature probe ) or uSP1 (Pressure probe) is showed on bottom

display, the top display shows the the temperature or pressure value.

3. Use the UP or DOWN keys to select uSt1 auxiliary probe for circuit 1or uSt2 auxiliary probe for circuit 2.

4. To exit the Hour function push MENU key or wait the timeout.

How to display the tempaerature of the internal temperaure sensor of the remote terminals 1

or 2

Inside the funcion menu it is possible to see the ambient temperature detected by the NTC sensor FUNCTION trEM to show the temperature of the remote panels Identification label trEM.

trE1 value of the NTC probe of the remote #1 trE2 value of the NTC probe of the remote #2

Select with UP or DOWN the trEM function Push SET the trE1 or trE2 label is shown on the bottom display, the top display shows the probe value. Use the UP or DOWN arrow to change beteween trE1 or trE2 read-out.

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To exit to the normal display read-out push MENU or wait the time – out time.

ATTENTION:

THE trEm function and the labels trE1 or trE2 appear only if the CF74 = =2 or 3 (remote panel 1 configuration) or if the parameter CF75 = 2 or 3 (remote panel 2 configuration).

17. ENERGY SAVING

17.1 Energy Saving Activation By Digital Input

The energy saving is activated when one digital input is configured as energy saving is active. If the energy saving is active, the icon is on.

The real value of the set point is showed pressing the key. When the Energy Saving function is activated the chiller set point and heat pump are modified as follow:

 Set point chiller = St1  ES14  Chiller differential = ES15  Set point heat pump = St4  ES16  Heat pump differential = ES17

17.2 Energy Saving Time Table With Rtc

This function can be used only if the Ichill has the real time clock on board (optional) and allows to set three events per day.

If the energy saving is active, the icon is on. The real value of the set point is showed pressing the key.

When the Energy Saving function is activated the chiller set point and heat pump are modified as follow:

 Set point chiller = St1  ES14  Chiller differential = ES15  Set point heat pump = St4  ES16  Heat pump differential = ES17

How to program the Energy saving and how to Switch on / Switch off the Ichill by RTC

Enter the parameter programming:

1. Select the ES parameter family.

2. Select the parameters ES07 (Monday)…ES13 (Sunday).

Configuration table Energy saving or unit ON/OFF activation with rtc programming

Par. ES07 – ES13 0= Function disabled

1= 1

period enabled 2= 2nd period enabled 3= 1st and 2nd periods enabled 4= 3rd period enabled 5= 1st and 3rd periods enabled 6= 2nd and 3rd periods enabled 7= 1st, 2nd and 3rd periods enabled

Energy saving or unit ON/OFF with RTC and X Y

where:

with range 0..7 represents the energy saving

where: Y with range 0..7 represents the unit on/off

Example of a daily programming:

Monday Enter parameter programming:

1. In the ES parameter family, select the parameter ES07, the top display shows 0 - 0

2. Push SET key and using UP or DOWN keys set the right value:

3. Push SET to confirm.

MONDAY

X = 0 - Y= 0: energy saving and automatic on/off are both disabled

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MONDAY

X = 0 - Y= 1: the energy saving is disabled, the automatic on is enabled in time band 1

MONDAY X = 3 - Y= 7: the energy saving is enabled in time band 1 and time band 2, the automatic on is enabled in time band 1, time band 2 and time band 3.

WEEKLY PROGRAMMING

Repeat the daily programming for the other days of the week using parameters ES08..ES13.

How to switch on the controller when it is off by real time clock

When the unit is in OFF by RTC and the parameter ES18 > 0, if the user switch on the controller by keyboard the unit stay on for ES18 time; when this time is elapsed the unit return to OFF.

18. DYNAMIC SETPOINT

This function allows to modify the set point according to outside temperature or a 4..20mA analog input. This function is enabled if:

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 In chiller mode the parameter Sd01 is not equal to 0.  In heat pump mode the parameter Sd02 is not equal to 0.  A analog input is configured as 4÷20mA for dynamic setpoint control or outside temperature

Dynamic setpoint diagram

Analog input configured as 4..20mA for dynamic setpoint:

Analog input configured as outside temperature and positive differential:

Analog input configured as outside temperature and negative differential:

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19. COMPRESSOR REGULATION

CF94

Working mode of the compressor 0 = chiller and heat pump 1 = only chiller 2 = only heat pump

0 2

It is possible to decide how many compressors are used in chiller, heat pump and sanitary water production.

o parameter CO76: number of compressors to use in chiller o parameter CO77: number of compressors to use in heat pump o parameter CO78: number of compressors to use in sanitary water

In case of contemporary production of sanitary water and chiller the number of compressors is defined by sanitary water request.

19.1 Compressor Security Time

o CO01 Minimum ON time of the compressor after switching on o CO02 Minimum OFF time of the compressor after switching off o CO91 Minimum time between two switch on of the same compressor

20. CHILLER / HEAT PUMP REGULATION

20.1 Parameter Description

Par. ST01 Chiller Setpoint It allows to set the chiller working temperature within the range ST02..ST03. Par. ST02 Minimum setpoint limit in chiller. The user cannot program a setpoint value lower than ST02, the range is –30 °C..ST01. Par. ST03 Maximum setpoint limit in chiller. The user cannot program a setpoint value higher than ST02, the range is ST01..70°C. Par. ST04 Heat pump setpoint It allows to set the Heat pump working temperature within the range ST05..ST06. Par. ST05 Minimum setpoint limit in heat pump. The user cannot program a setpoint value lower than ST05, the range is –30 °C..ST04. Par. ST06 Maximum setpoint limit in heat pump The user cannot program a setpoint value higher than ST06, the range is ST01..70°C. Par. ST07 Regulation band width in chiller mode. Par. ST08 Regulation band in heat pump mode Par. ST09 Defines the thermoregulation probe in chiller. 0= NTC Temperature probe of the evaporator inlet 1= NTC Temperature probe of the evaporator circuit 1 2= NTC Temperature probe of the evaporator circuit 2 3= NTC Temperature probe of the common evaporator 4= Remote keyboard 1 probe 5= Remote keyboard 2 probe The ST10 parameter defines the thermoregulation probe of the unit with heat pump control 0= NTC probe temperature of the evaporator inlet 1= NTC probe temperature of the evaporator 1 outlet 2= NTC probe temperature of the evaporator 2 outlet 3= NTC probe temperature of the evaporator common outlet

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4= Remote keyboard 1 probe 5= Remote keyboard 2 probe 6= NTC probe temperature of the condenser common inlet 7= NTC probe temperature of the condenser 1 inlet 8= NTC probe temperature of the condenser 2 inlet 9= NTC probe temperature of the condenser 1 outlet 10= NTC probe temperature of the condenser 2 outlet 11= NTC probe temperature of the condenser common outlet

The parameter ST11 determines the type of regulation St11 = 0 Proportional regulation St11 = 1 Neutral zone regulation

20.2 Proportional Regulation

Chiller regulation

Heat pump regulation

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20.3 Neutral Zone Regulation

Compressor regulation in chiller

Compressor regulation in heat pump

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Compressor in neutral zone

Par. CO53 Maximum time of work in neutral zone without insert resource

When the temperature is inside the neutral zone, a timer is activated (parameter CO53); when this time is elapsed, the Ichill switch on all the compressor to avoid an stationary situation.

If the parameter value is 0 the function is non activated.

Par. CO54 Maximum time of work in neutral zone without rotation resource

When the temperature is inside the neutral zone and only one compressor is ON, a timer is activated (parameter CO54); when this time is elapsed, the Ichill switch off the compressor and swith on an available compresso.

If the parameter value is 0 the function is non activated.

21. COMPRESSORS MANAGEMENT

21.1 Compressors Start- Up

The parameter CO10 defines the compressor start-up: CO10=0 direct CO10=1 part winding CO10=2 star-delta

Direct Start- Up

It is necessary to configure one relay to drive the contactor of the compressor.

EXAMPLE

Direct start up configuration for one compressor Set the parameter CF54 = c39  direct start-up RL1 compressor 1

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Fig. 1

Part Winding

Each compressor needs two relay outputs:

 Part Winding coil 1 of the compressor;  Part Winding coil 2 of the compressor.

The time delay between coil 1 and coil 2 activation is CO11 (decimal of second, in a range 0..5 seconds). The maximum number of relay outputs is 8, this means 4 compressors managed with Part Winding start-up.

EXAMPLE

Part Winding configuration of the compressor relay outputs Set the Par CF54 = c39 Part Winding coil 1 the compressor 1; Set the Par CF55 = c40 Part Winding coil 2 of the compressor 1.

Compressor Start- up With Part Winding First step: the Part winding coil 1 of the compressor 1 (relay K1 of fig2) is switched on

Second step: after the CO11 delay is turned on the Part winding coil 2 of the compressor 1 (relay K2 of fig2). To turn off the compressor the two relay outputs are both turned off at the same time.

Fig 2

Part Winding start- up of Compressors or capacity compressors If one or more capacity compressors are configured and the thermoregulation requires the full load start-up: the controller turns the solenoid valve on, after 1 second the first motor part of the 1st compressor (relay K1 of Fig. 2) and then the complete control with the contactor K2. Durning the CO13 time delay the step valve is forced on: minimum power. When the C013 is expired if the thermoregulation requires more power the valve will be switched off (maximum power).

Star - Delta Start up

The Ichill manages maximum 2 compressor with star-delta start-up; each compressor needs three relay outputs:

 Line 1 of the compressor 1 (Relay K1 of the Fig.3).  Line 2 of the compressor 1 (Relay K3 of the Fig.3).  Centre of the star (Relay K2 of the Fig.3)

Compressor switching on: the centre of the star relay is turned on (Relay K2 of the Fig.3), after 1 second the Line #1 relay is turned on (relay K1 Fig.3). The two relays work together for the time set in CO11, then the relay of centre of the star is

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switched off (relay K2 Fig.2). Then after the CO12 delay time the relay of the line #2 is turned on (relay K3 Fig.3). Compressor switching off: the output relay of the line #1 and line #2 are switched off together.

Fig. 3

Star - Delta Start- Up Of A Capacity Compressor If one or more capacity compressors are configured and the thermoregulation requires the full load control, the controller turns the solenoid valve on, then after 1 second the centre of the star relay is turned on (relay K2 Fig. 3). Then the star-delta procedure will be completed with the other two contactors. Durning the CO13 time delay the step valve is forced on: minimum power. When the C013 is expired if the thermoregulation requires more power the valve will be switched off (maximum power).

22. COMPRESSORS ROTATION

The CO14 parameter determines the sequence of compressor activation / deactivation. CO14= 0 Fixed sequence.

E.g.: 3 compressors configured Switching on: 1st compressor  2nd compressor  3rd compressor  etc. Switching off: 3rd compressor  2nd compressor - 1st compressor

CO14= 1

Working hour rotation First compressor to be activated is the compressor with less working hours; next compressor to be activated follows the same rule.

CO14= 2

Sart-up rotation First compressor to be activated is the compressor with less start-up; next compressor to be activated follows the same rule.

23. CAPACITY STEP CONTROL

CO06 capacity step operation mode.

To select the right operation mode, please read the compressor technical documentation.

 CO06 = 0 ON/OFF step

Eg: compressor with 3 capacity step.

Capacity

25% 50% 75% 100%

Compr.

Compressor

ON Out relay

Cap.

tep 1

Cap.

tep 1

OFF

Cap.

tep 1

OFF

Cap.

tep 1

OFF

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Out relay

Cap.

tep 2

OFF

Cap.

tep 2

Cap.

tep 2

OFF

Cap.

tep 2

OFF Out relay

Cap.

tep 3

OFF

Cap.

tep 3

OFF

Cap.

tep 3 ON

Cap.

tep 3

OFF

Step control process

Compressor

Cap.

step 1

Cap.

step 2

Cap.

step 3

Power

0 % 25 % 50 % 75 % 100 %

 CO06 = 1 direct action

Eg: compressor with 3 capacity step.

Capacity

25% 50% 75% 100%

Compr.

Compressor

ON Out relay

Cap.

tep

Cap.

tep

1 ON

Cap.

tep

1 ON

Cap.

tep

OFF Out relay

Cap.

tep

OFF

Cap.

tep

2 ON

Cap.

tep

2 ON

Cap.

tep

OFF Out relay

Cap.

tep

OFF

Cap.

tep

OFF

Cap.

tep

3 ON

Cap.

tep

OFF

Direct action with sequential step

Compressor

Cap.

step 1

Cap.

step 2

Cap.

step 3

Power

0 % 25 % 50 % 75 % 100 %

 CO06 = 2 inverse action

Eg: compressor with 3 capacity step.

Capacity

25% 50% 75% 100%

Compr.

Compressor

ON Out relay

Cap.

tep

1 ON

Cap.

tep

1 ON

Cap.

tep

1 ON

Cap.

tep

OFF Out relay

Cap.

tep

2 ON

Cap.

tep

2 ON

Cap.

tep

OFF

Cap.

tep

OFF Out relay

Cap.

tep

3 ON

Cap.

tep

OFF

Cap.

tep

OFF

Cap.

tep

OFF

Inverse action with sequential step

Compressor

Cap.

step 1

Cap.

step 2

Cap.

step 3

Power

0 % 25 % 50 % 75 % 100 %

 CO06 = 3 Continuous steps and direct action

Eg: compressor with 3 capacity step.

Capacity

25% 50% 75% 100%

Compr.

compressor

ON Out

relay

Cap.

tep 3

OFF

Cap.

tep 3

Cap.

tep

Cap.

tep

3 ON

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Out relay

Cap.

tep 2

OFF

Cap.

tep

OFF

Cap.

tep

2 ON

Cap.

tep

N Out relay

Cap.

tep

OFF

Cap.

tep

Cap.

tep

Cap.

tep

Direct action with sequential step

Compressor

Cap.

step 1

Cap.

step 2

Cap.

step 3

Power

0 % 25 % 50 % 75 % 100 %

ATTENTION

When working with capacity control in sequential step in direct or reverse modes: if the power requested is 50% and 75% the unit turn on also the step 25% that must be enabled to make run the other two.

23.1 Minimum Load Start- Up

Par. CO07: configuration of the start-up with minimum load.

This parameter allows to configure the first capacity step operation mode for alternative compressors and screw compressors.

CO07=0

First capacity step is used only to start the compressor at the minimum load; the valve is switched on for CO13 seconds, then it is switche off.

CO07=1

First capacity step is used as lower step of the regulation. CO07=2 SCREW COMPRESSOR

First capacity step is used only to start the screw compressor at the minimum load; the valve is ON when the compressor is OFF and it remains ON for CO13 seconds after the switching ON of the compressor.

CO07=3 SCREW COMPRESSOR First capacity step is used as lower step of the regulation; when the compresor is OFF the valve is ON.

23.2 INTERMITTENT SOLENOID VALVE FOR SCREW COMPRESSOR

Some screw compressors have an intermittent solenoid valve; when the compressor is ON, this valve stays CO08 ON and CO09 OFF.

24. COMPRESSOR INVERTER CONTROLLED

The signal 0÷10V is given by one of 4 configurable outputs of the Ichill (OUT3÷OUT6). The compressor inverter controlled can be used only with proportional regulation (parameter St11=0). Possible unit configuration:

 1 circuit: 1 compressor inverter controlled  1 circuit: 1 compressor inverter controlled and maximum 2 compressor (managed by relay)  2 circuits: 1 compressor inverter controlled per circuit  2 circuits: 1 compressor inverter controlled and maximum 2 compressor (managed by relay) per

circuit

First step to be activated is always the compressor inverter controlled; it will be swiched on when the regulation requests 100% of the compressor power.

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To increase / decrease the power the compressor works by step of 1% of the power; every step is delayed by CO62 at the start-up of the compressor and CO71 when the compressor works normally. When the compressor inverter controlled is activated, it works at power configured by CO61 parameter for CO60 seconds; after that:

 if the parameter CO62=0 the compressor modulates the power according to the regulation request  the parameter CO620 the compressor is forced to works at maximum power and then it modulates

the power according to the regulation request

It is possible to limit the output % of the inverter compressor in Chiller, Heat pump and Sanitary hot water:

o maximum % output inverter in Chiller (parameter CO79) o maximum % output inverter in Heat pump (parameter CO80) o maximum % output inverter in Sanitary hot water (parameter CO81)

COMPRESSOR INVERTER CONTROLLED OPERATING MODE: CHILLER

At the start up the compressor is forced to work at CO61 speed for CO60 seconds.

COMPRESSOR INVERTER CONTROLLED OPERATING MODE: HEAT PUMP

At the start up the compressor is forced to work at CO61 speed for CO60 seconds.

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TWO COMPRESSORS INVERTER CONTROLLED OPERATING MODE: CHILLER

TWO COMPRESSORS INVERTER CONTROLLED OPERATING MODE: HEAT PUMP

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Parameters involved:

CO60

Operation time at CO61 power when the compressor inverter controlled is switched on

0 250 sec

CO61

Forced power when the compressor inverter controlled is switched on

0 100 %

CO62

Delay to increase the power during the start up phase of the compressori inverter controlled

1 250

sec

CO63

Compressor inverter controlled operation power under whitch start counting CO64 time

0 100 %

CO64

Maximun operation time of the compressor inverter controlled with power less than CO63

0 250 Min

10 Min

CO65

Operating time of the compressor inverter controlled at maximum power

0 250 sec

10sec

CO66

Maximum operating time of the compressor inverter controlled

0 999 Hr 1Hr

CO67

Minimum value of the compressor 1 inverter controlled

0 CO68

CO68

Maximum value of the compressor 1 inverter controlled

CO67 100

CO69

Minimum value of the compressor 2 inverter controlled

0 CO70

CO70

Maximum value of the compressor 2 inverter controlled

CO69 100

CO71

Delay to increase/decrease the power of the compressori inverter controlled

1 250

sec

...

CO79

Maximum speed of the inverter compressors in chiller

1 100

CO80

Maximum speed of the inverter compressors in heat pump

1 100

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CO81

Maximum speed of the inverter compressors in sanitary water

1 100

CO82

Outside temperature to reduce inverter compressor speed in Heat pump

50.0

-58

0.0 0

70.0 158

50.0 725

°C °F

Bar

Psi

Dec

int

Dec

int

CO83

Hysteresis temperature to reduce inverter compressor speed in Heat pump

0.1 0

0.1 1

25.0 45

14.0

203

°C °F

Bar

Psi

Dec

int

Dec

int

CO84

Compressor speed if outside temperature > CO82 0 100 %

24.1 Inverter Compressor In Heat Pump And External Temperature

It is possible to reduce the compressor speed (both compressor in parallel if configured) in heat pump when external temperature increases over a determined temperature.

25. COMPRESSOR RACK

The IC200L can manage a compressor rack; the configuration parameters are Cr01…Cr09. In this operation mode the controller can manage maximum 6 compressors in only one circuit; only the chiller mode is enabled and the regulation is only in proportional mode. The parameter Cr01 allows to enable the compressor rack regulation:

Cr01 = 0 Compressor rack regulation disabled Cr01 = 1 Compressor rack enabled and regulation on the probe defined by parameter ST09 Cr01 = 2 Compressor rack enabled and regulation on the evaporator trasducer

It is possible to choose the number of compressors the controller can use in case of regulation faulty probe; the parameter involved is Cr08. It is possible to choose the number of condenser fan steps the controller can use in case of faulty probe; the parameter involved is Cr09.

The Energy Saving function, in case of compressor rack unit, has dedicated set point and differential (parameter Cr06 = “Energy saving offset for compressor rack unit”, Cr07 = “Energy saving differential for compressor rack unit”)

Graph of the compressors thermoregulation

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26. COMPRESSORS WITH DIFFERENT CAPACITY

The function is enabled if:

 one circuit unit  at least 2 compressor are configured  the capacity of the compressors is not 0 and different for each one

Parameters involved:

CF87 Compressor 1 capacity 0 100% CF88 Compressor 2 capacity 0 100% CF89 Compressor 3 capacity 0 100% CF90 Compressor 4 capacity 0 100% CF91 Compressor 5 capacity 0 100% CF92 Compressor 6 capacity 0 100% CF93 Maximum number of start up of the compressor in 15 minutes

0= Not enabled

0 15

Example: circuit with 2 compressors:

 step 1: the first compressor to be activated is the compressor with lower weight  step 2: the compressor is switched off and is activated the compressor with higher weight  step 3: both compressors are activated

The regulation is a steps; if two compressors with different weight are configured, are available 3 steps activated in regulation band ST07 or ST08.

ATTENTION: It is possible to protect the compressor setting a maximum number of activation per hour.

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27. CIRCUIT MANAGEMENT: SATURATION OR BALANCING

CIRCUIT SATURATION CO15 = 0

If the machine has 2 compressors in the circuit 1 and 2 compressors in the circuit 2, the sequence of activation is: 1st compressor circuit 1 2nd compressor circuit 1  1st compressor circuit 2 2nd compressor circuit 2

CIRCUIT BALANCING CO15 = 1

If the machine has 2 compressors in the circuit 1 and 2 compressors in the circuit 2, the sequence of activation is: 1st compressor circuit 1 1st compressor circuit 2  2nd compressor circuit 2 2nd compressor circuit 2

28. PUMP DOWN

PUMP DOWN with low pressure switch or pump down pressure switch CO36 = 1 Pump down enabled during the switching off (low pressure switch or pump down switch)

CO36 = 2 Pump down enabled during the switching off and switching on (low pressure switch or pump down switch)

Before turning off the last compressor, the solenoid valve is closed; the compressor works until the pressure switch is activated or after a maximum time CO39; in this case an alarm is displayed (b1PH or b2PH) but the machine continuous to work as normal. If the alarm occurs more than AL21 times per hour, the Ichill generate a manual alarm. Low pressure alarm (when the low pressure switch is used) is disabled for AL02 time after valve activation (AL02=0 the alarm is disabled when the compressor is OFF). When the first compressor of the circuit is switched on, the solenoid valve is switched on 1 seconds before it if the pressure switch is not active. If the pump down pressure switch remains activeated, the compressors does not restart and after CO39 time a pump-down alarm is displayed. The parameter AL23 allows to choose if the pump down alarm (during the switching on) is automatic or manual reset:

 AL23 =0 automatic reset; the compressor will rester when the pump down pressure switch is active  AL23=1 manual reset; if the number of pump down alarm per hour is lower than AL22 the reset is

automatic, manual reset; if the number of pump down alarm per hour is higher than AL22 the reset is manual

PAR. CO36 = 3 Pump down enabled during the switching off only in chiller mode (low pressure switch or pump down switch)

The pump douwn procedure works as CO36=1 but only in chiller mode; in heat pump mode the solenoid valve is activated when the first compressor is ON and de-.activated when the last compressor is OFF.

PAR. CO36 = 4 Pump down enabled during the switching off and switching on inly in chiller mode (low pressure switch or pump down switch)

The pump douwn procedure works as CO36=2 but only in chiller mode; in heat pump mode the solenoid valve is activated when the first compressor is ON and de-.activated when the last compressor is OFF.

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PUMP DOWN with low pressure probe CO36 = 1 Pump down enabled during the switching off (low pressure probe)

Before turning off the last compressor, the solenoid valve is closed; the compressor works until the pressure falls below CO37 or after a maximum time CO39; in this case an alarm is displayed (b1PH or b2PH) but the machine continuous to work as normal. If the alarm occurs more than AL21 times per hour, the Ichill generate a manual alarm. Low pressure alarm (when the low pressure switch is used) is disabled for AL02 time after valve activation (AL02=0 the alarm is disabled when the compressor is OFF). When the first compressor of the circuit is switched on, the solenoid valve is switched on 1 seconds before it.

CO35 = 2 Pump down enabled during the switching off and switching on (low pressure probe) Before turning off the last compressor, the solenoid valve is closed; the compressor works until the pressure falls below CO37 or after a maximum time CO39; in this case an alarm is displayed (b1PH or b2PH) but the machine continuous to work as normal. If the alarm occurs more than AL21 times per hour, the Ichill generate a manual alarm. Low pressure alarm (when the low pressure switch is used) is disabled for AL02 time after valve activation (AL02=0 the alarm is disabled when the compressor is OFF). When the first compressor of the circuit is switched on, the solenoid valve is switched on 1 seconds before it. When the first compressor of the circuit is switched on, the solenoid valve is switched on 1 seconds before it if the pressure is higher than CO37 + CO38. If the pressure remains lower than CO37 + CO38 the compressors does not restart and after CO39 time a pump-down alarm is displayed. The parameter AL23 allows to choose if the pump down alarm (during the switching on) is automatic or manual reset:

 AL23 =0 automatic reset; the compressor will rester when the pump down pressure switch is active  AL23=1 manual reset; if the number of pump down alarm per hour is lower than AL22 the reset is

automatic, manual reset; if the number of pump down alarm per hour is higher than AL22 the reset is manual

CO36 = 3 Pump down enabled during the switching off only in chiller mode(low pressure probe)

The pump douwn procedure works as CO36=1 but only in chiller mode; in heat pump mode the solenoid valve is activated when the first compressor is ON and de-.activated when the last compressor is OFF.

CO36 = 4 Pump down enabled during the switching off and switching on only in chiller mode (low pressure probe)

The pump douwn procedure works as CO36=1 but only in chiller mode; in heat pump mode the solenoid valve is activated when the first compressor is ON and de-.activated when the last compressor is OFF.

ATTENTION If the pump down function is enabled, during the unit start-up from digital input as pump down pressure switch and also from analogue input as low pressure transducer, the compressor will restart only if both the inputs are satisfied.

Pump Down by TIME

The pump down can be enabled also by time; in this case the compressor is activated after CO58 from solenoid valve switching on and de-activated after CO59 from solenoid valve switching off.

CO 58

Maximum time for the activation of the pump-down during the switching off

CO58 = 0 Not enabled

0 250 Sec

CO 59

Maximum time for the activation of the pump-down during the switching on

CO59 = 0 Not enabled

0 250 Sec

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29. UNLOADING

29.1 High Temperature Of The Evaporator Water Inlet

It is possibble to use this function if there are at least 2 steps of power (two compressor or 1 compressor with partialization) for every circuit or with inverter compressor.

UNLOADING ACTIVATION

When the evaporator water inlet temperature is higher than CO40 for CO42 time, the display shows and the unit works with the number of compressors selected in CO49 parameter or CO96 speed in case of inverter compressor.

EXAMPLE

2 circuits and 3 compressors per circuit 6 compressors are running; if CO49 = 2 in case of unloading 2 compressors are switched off and 4 continuous to work.

UNLOAD DE-ACTIVATION

When the evaporator water inlet temperature falls below CO40-CO41 the unloading function is disabled and all compressor are available to work.

Unloading Information

If the evaporator water inlet temperature remains between CO40 and CO40-CO41, after CO43 time the unloading function is deactivated.

29.2 Condenser High Pressure, Condenser High Temperature Or Evaporator Low Pressure

UNLOADING ACTIVATION IN CHILLER MODE

When the condenser pressure or temperature is higher than CO44 the display shows and the unit works with the number of compressors selected in CO49 parameter or CO96 speed in case of inverter compressor. If the compressor is a screw compressor the unloading function works at least CO50 time; if CO50 = 0 this function is disabled.

EXAMPLE

2 circuits and 3 compressors per circuit 6 compressors are running; if CO49 = 2 in case of unloading 2 compressors are switched off and 4 continuous to work.

UNLOADING DE-ACTIVATION IN CHILLER MODE

When the condenser pressure or condenser temperature falls below CO44-CO45 the unloading function is disabled and all compressor are available to work.

Other information about the Unloading in chiller

If the condenser pressure or condenser temperature remains between CO44 and CO44-CO45, after CO48 time the unloading function is deactivated.

UNLOADING IN HEAT PUMP MODE

The reference probe for this function is the evaporator probe; if any evaporator probe is configured, the function uses the condenser probe.

When the evaporator/condenser pressure is lower than CO46 the display shows and the unit works with the number of compressors selected in CO49 parameter or CO96 speed in case of inverter compressor. If the compressor is a screw compressor the unloading function works at least CO50 time; if CO50 = 0 this function is disabled.

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EXAMPLE

2 circuits and 3 compressors per circuit 6 compressors are running; if CO49 = 2 in case of unloading 2 compressors are switched off and 4 continuous to work.

UNLOADING DE-ACTIVATION in HEAT PUMP MODE

When the evaporator probe (orcondenser pressure or condenser temperature) increase over CO46+CO47 the unloading function is disabled and all compressor are available to work.

Other information about the Unloading in Heat Pump

If the evaporator probe (or condenser pressure or condenser temperature) remains between CO46 and CO46+CO47, after CO48 time the unloading function is deactivated.

29.3 Low Temperature Of The Evaporator Water Outlet

ACTIVATION

The lower value between the inlet evaporator probe, common outlet evaporator probe or outlet probe for the circuit, enables the unloading function. When the value of one of the probes above decrease under the set point CO55 the unloading function is activated; the number of active compressors/step is determined by the CO49 parameter or CO96 speed in case of inverter compressor. The display shows the label b1EU – b2EU alternated to a default visualization.

DE-ACTIVATION

Unloading function is disabled when the temperature of all the probes configured rise over CO55 + CO56 or when the CO57 time is elapsed.

30. SOLENOID VALVE FOR LIQUID INJECTION

It is possible to configure 2 valves for the liquid injection of the screw compressor (compressor 1 and compressor 2). When the compressor is off the solenoid valve is always OFF. When the compressor is on:

 if the temperature detected by the probe mounted in the compressor increases over CO51 setpoint,

the valve is switched on

 if the temperature detected by the probe mounted in the compressor decreases under C51-CO52

the valve is switched off.

31. EVAPORATOR WATER PUMP / SUPPLY FAN (AIR/AIR UNIT)

Water pump / supply fan operation mode:

CO16=0: Not enabled: water pump/supply fan is not managed. Attention: The air / air unit configured with CO16= 0 does not manage the output for integration heaters.

CO16 = 1: Continuous control

The water pump / supply fan is ON only if the unit is running (chiller or heat pump). When the Ichill is switched on in chiller or heat pump, the water pump is immediately activated and the first compressor is switched on after CO17 delay. When the Ichill is in STD-BY or remote OFF the water pump is OFF (with a delay if CO18>0). The parameter Ar09 allows to set the status of the water pump in case of antifreeze if the Ichill is in stand-by.

CO16 = 2: on compressor demand The water pump / supply fan is ON only if at least a compressor is ON; in case of compressor activation, the water pump is switched on CO17 before the compressor.

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When the last compressor is switched off, the water pump / supply fan is switched off after CO18 delay from compressor. When the unit is in stand-by or remote off and the Ar09 =1, if the regulation requires the antifreeze heaters also the water pump is turned on.

The pump is always off when:

 Remote OFF from digital input.  Water pump overload.  Evaporator flow switch alarm if MANUAL reset.

During the defrost and when the compressor is off in dripping time the water pump/supply fan is on.

31.1 Evaporator Pump Group

It is possible to configure two evaporator water pumps; the water pump to be activated is the pump with less working hours. When a water pump works continuosly for CO19 time, the other one is switched on and after CO20 second the first one is switched off. If a water pump overload occurs, the water pump is switched off and the other one is switched on.

Note: During the defrost and when the compressor is off in dripping time, the pump is on.

31.2 Modulating Evaporator Water Pump

To enable the modulating evaporator water pump is necessary to configure an analog output as “Modulated evaporator water pump” (see analog and digital output configuration) . The modulating evaporator water pump is enabled in cooling, heating and sanitary hot water production; if the machine is in STD-BY or OFF the water pump is OFF.

The water pump works according the Dt between two probes, which can be choosen both in summer an winter mode, among those configured in the instrument (Pb1, Pb2,…). If the state of the water pump is tied to the state of the compressor, when last compressor is switched off the water pump is forced to run at US60 speed for CO18 minutes, then it is switched off. If the state of the water pump is not tied to the state of the compressor, when last compressor is switched off the water pump is forced to run at US60 speed.

The regulation is done as showed below.

Chiller and chiller + sanitary hot water (machine with valves OUt1 and OUT2 in the gas circuit)

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Parameter Description min max udm US 47 Probe 1 selection for evaporator water pump modulation in chiller 0 10 US 48 Probe 2 selection for evaporator water pump modulation in chiller 0 10 US 49 Set point for maximum speed of modulationg evaporator water pump in chiller 30.0

-58

0.0 0

70.0 158

50.0 725

°C °F

Bar

Psi

Dec

int

Dec

int

US 50 Proportional band for maximum speed of modulationg evaporator water pump

in chiller

0.0 0

25.0 45

14.0

203

°C °F

Bar

Psi

Dec

int

Dec

int

US 51 Minimum speed of the evaporator water pump in chiller 0 100 % US 52 Maximum speed of the evaporator water pump in chiller 0 100 %

Heat pump and sanitary hot water

Parameter Description min max udm US 53 Probe 1 selection for evaporator water pump modulation in Heat Pump 0 10 US 54 Probe 2 selection for evaporator water pump modulation in Heat Pump 0 10 US 55 Set point for maximum speed of modulationg evaporator water pump in Heat

Pump

30.0

-58

0.0 0

70.0 158

50.0 725

°C

°F

Bar

Psi

Dec

int

Dec

int

US 56 Proportional band for maximum speed of modulationg evaporator water pump

in Heat Pump

0.0 0

25.0 45

14.0

203

°C

°F

Bar

Psi

Dec

int

Dec

int

US 57 Minimum speed of the evaporator water pump in Heat Pump 0 100 % US 58 Maximum speed of the evaporator water pump in Heat Pump 0 100 %

32. WATER PUMP OF THE CONDENSER

Condenser Water pump control

Water pump operation mode:

CO21=0: Not enabled: water pump is not managed. CO21 = 1: Continuous control

The water pump is ON only if the unit is running (chiller or heat pump).

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When the Ichill is switched on in chiller or heat pump, the water pump is immediately activated and the first compressor is switched on after CO17 delay. When the Ichill is in STD-BY or remote OFF the water pump is OFF (with a delay if CO23>0). The parameter Ar09 allows to set the status of the water pump in case of antifreeze if the Ichill is in stand-by.

CO21 = 2: on compressor demand The water pump is ON only if at least a compressor is ON; in case of compressor activation, the water pump is switched on CO17 before the compressor. When the last compressor is switched off, the water pump is switched off after CO23 delay from compressor. When the unit is in stand-by or remote off and the Ar09 =1, if the regulation requires the antifreeze heaters also the water pump is turned on.

The pump is always off when:

 Remote OFF from digital input.  Water pump overload.  Condenser flow switch alarm if MANUAL reset.

During the defrost and when the compressor is off in dripping time the water pump/supply fan is on.

32.1 Condenser Pump Group

It is possible to configure two condenser water pumps; the water pump to be activated is the pump with less working hours. When a water pump works continuosly for CO24 time, the other one is switched on and after CO25 second the first one is switched off. If a water pump overload occurs, the water pump is switched off and the other one is switched on.

33. CYCLIC OPERATION OF THE WATER PUMPS

If the water pump is OFF (reached set point), is possible to enable it to run to detect the right water temperature. At the end of the ON time, the controller verify if is necessary to switch on the compressor/s or not; if is not necessary, the water pump is switched OFF for CO85 time and then switched on for another CO87 ON cycle.

Parameters Description min max unit of

measure CO 85 Evaporator water pump OFF time if the set point is reached 0 250 10 min CO 86 Evaporator water pump OFF time if the machine is STD-BY or

OFF

0 250 10 hour

CO 87 Evaporator water pump ON time 0 250 10 Sec CO 88 Condenser water pump OFF time if the set point is reached 0 250 10 min CO 89 Condenser water pump OFF time if the machine is STD-BY or

OFF

0 250 10 hour

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CO 90 Condenser water pump ON time 0 250 10 Sec

34. HOT START

In the air air unit and in heating mode it is possible to stop the supply fan when the outlet evaporator temperature falls below FA24 degrees.

FA24 Hot start Setpoint FA25 Hot start differential

35. LOAD MAINTENANCE

It is possible to determine for each load (compressors and water pumps) the number of working hours after witch the display will show a maintenance warning.

Parameters CO26..CO31: number of working hour of the compressors Parameters CO32..CO33: number of working hour of the evaporator water pump Parameters CO34..CO35: number of working hour of the condenser water pump Parameters CO73: number of working hour of the sanitary water pump Parameters CO74: number of working hour of the solar panel water pump Parameters CO95: number of working hour of the free cooling water pump

If the parameter is set to 0, the maintenance signalling is disabled but the running hours counter remains active.

36. CONDENSER FAN REGULATION

The signal to drive the modulating condenser fan is available in the PWM outputs (TF1 and TF2 in the connection diagram) or in the Out 1 and Out2; for these output the parameters that allows to choose the signal are:

CF68 Condenser fan circuit 1

CF68=0 0..10V CF68=1 4..20mA CF68=2 PWM

CF69 Condenser fan circuit 2

CF69=0 0..10V CF69=1 4..20mA CF69=2 PWM

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FA01 and FA02 parameters define the operative mode of the condenser fans. Par. FA01 Fan regulation 0 = Output not enabled 1 = Always on 2 = ON/OFF step regulation 3 = ON/OFF continuous step regulation 4 = proportional fan speed Par. FA02 Condenser fan operation mode 0 = Fan on only if compressor on 1 = Independent from the compressor and off during the stand–by / or from remote OFF

Example: Par. FA01 = 1 / Par. FA02 = 0 Fans on when the compressor on (the fans work following the same output algorithm)

Par. FA01 = 1 / Par. FA02 = 1 Independent from the compressor status but off in stand–by.

Par. FA01 = 2 / Par. FA02 = 0 Fans on, with ON/OFF regulation and with temperature/pressure transducer control, only when the compressor is on (at least one relay is configured as fan control). When the compressor turns off also the fans are forced off.

Par. FA01 = 2 / Par. FA02 = 1 Fans on, with ON/OFF regulation and with temperature/pressure transducer control, only when the compressor is on (at least one relay is configured as fan control). When the compressor turns off the fans are thermoregulated depending on the condensing temperature/pressure.

Par. FA01 = 3 / Par. FA02 = 0 Fans on, with ON/OFF continuos regulation and with temperature/pressure transducer control, only when the compressor is on (at least one relay is configured as fan control). When the compressor turns off also the fans are forced off.

Par. FA01 = 3 / Par. FA02 = 1 Fans on, with ON/OFF continuos regulation and with temperature/pressure transducer control, only when the compressor is on (at least one relay is configured as fan control). When the compressor turns off the fans are thermoregulated depending on the condensing temperature/pressure.

Par. FA01 = 4 / Par. FA02 = 0 Fans on, with proportional regulation (PWM, 4..20mA, 0.10V) and with temperature/pressure transducer control, only when the compressor is on. When the compressor turns off also the fans are forced off.

Par. FA01 = 4 / Par. FA02 = 2 Fans on in proportional regulation (PWM, 4..20mA or 0..10V) according to condenser temperature/pressure (only when the compressor is on). When the compressor turns off the fans are thermoregulated depending on the condensing temperature/pressure.

36.1 Output Step Rele’ Condenser Fan

Par FA01 = 2 ON/OFF step regulation E.G.: 1 circuit and 4 step of ventilation

OUT relè

step n° 1

step n° 2

step n° 3

step n° 4

Out relè step n° 1

ON OFF OFF OFF Out relè step n° 2

OFF ON OFF OFF Out relè step n° 3

OFF OFF ON OFF Out relè step n° 4

OFF OFF OFF ON

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Par FA01 = 3 ON/OFF continuous step regulation E.G.: 1 circuit and 4 step of ventilation

Continuous step regulation

OUT relè

Gradino n° 1

Gradino n° 2

Gradino n° 3

Gradino n°

4 Out relè step n° 1

ON ON ON ON Out relè step n° 2

OFF ON ON ON Out relè step n° 3

OFF OFF ON ON Out relè step n° 4

OFF OFF OFF ON

36.2 Pwm Output For Fan Control

When the condenser fan is switched on it works at maximum speed for FA03 time, then it modulate according to condenser pressure/temperature or evaporator pressure (heat pump mode). F04 parameter allows to adapt the signal to the motor (current-voltage phase displacement of a line-powered ac load). If FA01=3, when the compressor starts-up and the proportional regulation requires to turn off the fan (cut-

off), if FA140 the fan is forced at the minimum speed for the time set in FA14 itself (if FA14=0 the function is disabled).

36.3 Condensing Unit: Common Or Separate Condenser

FA05 defines the condenser unit

Par. FA05 type of condenser FA05=0 Common condenser unit FA05=1 Separate condenser units If FA05= 0 the condenser fan of the circuit 1 and circuit 2 works in parallel:

 CHILLER mode: the regulation probe is the probe that has the higher value  HEAT PUMP mode: the regulation probe is the probe that has the lower value

36.4 Proportional Regulation Of Condenser Fans

Condenser fan in Chiller mode.

Condenser fan in Heat pump mode.

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36.5 On/Off Regulation Of Condenser Fans

Condenser fan in Chiller mode.

Condenser fan in Heat pump mode.

36.6 Pre-Ventilation And Post-Ventilation

Pre-ventilation:

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in chiller and heat pump mode when first compressor is swtiched on if FA06>0 and/or FA30>0 the fan runs at maximum speed for FA06 and/or FA30. Post-ventilation: in heat pump mode if FA31>0 and outside temperature > FA32, when last compressor is switched off the condenser fan (if on at that moment) is forced at FA33 speed for FA31 seconds (outside temperature probe is required).

37. ANTI FREEZE HEATERS, INTEGRATION HEATING OR BOILER

Regulation of the heaters in chiller

The Par. Ar06 selects the probe/s control for the anti-freeze relay outputs configured as anti-freeze / support / boiler heaters for the circuits 1 and 2 in chiller mode. Par. Ar06 = 0: the function is disabled Par. Ar06 = 1: function enabled; the regulation probe is evaporator water inlet. Par. Ar06 = 2: function enabled; the regulation probe are evaporator water outlet circuit 1 and evaporator water outlet circuit 2. ATTENTION: It is not possible to control the heaters of the circuit #1 with the probe of the circuit #2 and viceversa. Par. Ar06 = 3: function enabled; the regulation probe are evaporator water outlet circuit 1, evaporator water outlet circuit 2 or evaporator common probe. Par. Ar06 = 4: function enabled; the regulation probe is outside temperature.

Regulation of the heaters in heat pump

The Par. Ar07 selects the probe/s control for the anti-freeze alarm and the relay outputs configured as antifreeze / support / boiler heaters for the circuits 1 and 2 in heat pump mode. Par. Ar07 = 0: the function is disabled Par. Ar07 = 1: function enabled; the regulation probe is evaporator water inlet. Par. Ar07 = 2: function enabled; the regulation probe are evaporator water outlet circuit 1 and evaporator water outlet circuit 2. ATTENTION: It is not possible to control the heaters of the circuit #1 with the probe of the circuit #2 and viceversa.

Par. Ar07 = 3: function enabled; the regulation probe are evaporator water outlet circuit 1, evaporator water outlet circuit 2 or evaporator common probe. Par. Ar07 = 4: function enabled; the regulation probe is outside temperature.

ANTI-FREEZE HEATERS, INTEGRATION HEATING, BOILER HEATERS DURING THE DEFROST CYCLE

The Ar05 parameter allows to choose the operation mode of the heaters during the defrost: Par. Ar05 = 0: The heaters are activated according the regulation request. Par. Ar05 = 1: The heaters are activated only by the regulation request and are always on during the defrost. The heaters are switched on when the 4-way valve change from heat-pump to chiller and switched off only after the dripping time and the compressors restart.

Condenser Anti-freeze heaters regulation

The parameter Ar08 allows to select the heaters probe control in chiller and heat pump mode. Par. Ar08 = 0: the function is disabled. Par. Ar08 = 1: function enabled; the regulation probe is condenser water inlet. Par. Ar08 = 2: function enabled; the regulation probe are condenser water inlet circuit 1, condenser water inlet circuit 2 and condenser water common inlet. ATTENTION: It is not possible to control the heaters of the circuit #1 with the probe of the circuit #2 and viceversa. Par. Ar08 = 3: function enabled; the regulation probe are evaporator water outlet circuit 1, evaporator water outlet circuit 2 Par. Ar08 = 4: function enabled; the regulation probe are evaporator water outlet circuit 1, evaporator water outlet circuit 2 and condenser common outlet.

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ATTENTION When the outputs are configured as heaters circuit #1 and 2 they are both controlled by the NTC probe of the common condenser outlet.

Graph of the anti-freeze- integration heating - boiler heater relays

Boiler function

The function is enabled when:

 One probe is configured as outside temperature.  Parameter Ar11 > 0.

Ar11=1 Boiler in integration mode

When outside temperature decreases under the Ar12 setpoint, the Ar14 delay starts counting. If during the Ar14 counting the external air increases above the Ar12 + Ar13 (differential) the function is aborted and the Ar14 time is reloaded. When the time Ar14 is elapsed and the external air temperature is still under the Ar12 setpoint, if the water temperature detected by the evaporator probe is lower than Ar15 in chiller mode or Ar17 in heat pump mode, the heaters are turned on. When the temperature rises over Ar15 + Ar16 in chiller mode or Ar17+Ar18 in heat pump the heaters are turned off. If the heaters are on, when the outside temperature increases over Ar12 + Ar13, they are turned off and the Ar14 delay is reloaded. Attention If outside temperature falls blow Ar19 setpoint, the compressors are switched off; they can restart if the outside temperature increase over Ar19+Ar20.

Heating control Ar11=2

When outside temperature decreases under the Ar12 setpoint, the Ar14 delay starts counting. If during this delay the outside temperature increase over the Ar12+Ar13 the process is aborted and the time Ar14 reloaded. When the time Ar14 is elapsed and the external air temperature is still under the Ar12 setpoint, if the water temperature detected by the evaporator probe is lower than Ar15 in chiller mode or Ar17 in heat pump mode, the heaters are turned on and the compressor(s) and the condensing fan(s) are turned off. The heating is made only by the heaters. When outside temperature increase over Ar15+Ar16 or Ar15 + Ar17 the heaters are turned off. If the outside temperature increase over Ar12 +Ar13, the heaters are turned off, the compressor regulation restarts, the Ar14 delay is reloaded.

BOILER HEATERS DURING the DEFROST CYCLE

The Ar05 parameters defines the tatus of the heaters during the defrost: Ar05=0 Heaters activated accordingb the regulation Ar05=1 The heaters are switched on when the 4-way valve changes the status from heat pump to chiller and switched off after the dripping time at the end of the defrost.

ATTENTION

The heaters of the boiler are always off in case of:

 flow switch alarm  water pump overload alarm

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38. AUXILIARY RELAYS

Par. uS01 configuration auxiliary relay 1 Par. uS05 configuration auxiliary relay 2 0 = Not enabled 1 = Function enabled, direct action, also if the Ichill is in stand-by or remote off. 2 = Function enabled, direct action, only if the Ichill is on in chiller or heat pump (not in stand-by or remote off) 3 = Function enabled, inverse action, also if the Ichill is in stand-by or remote off 4 = Function enabled, inverse action, only if the Ichill is on in chiller or heat pump (not in stand-by or remote off). To configure the regulation of the auxiliary relay, please refer to uS parameters.

Auxiliary relay with direct action

Auxiliary relay with inverse action

US 1

Auxiliary relay 1 operating mode 0= Not enabled 1= Always available with direct action 2= Available only when the unit is on with direct action 3= Always available with reverse action 4= Available only when the unit is on with reverse action

0 4

US 2

Analog input configuration for auxiliary relay 1 control. Allows to select which probe value Pb1..Pb10 controls the relay

1 10

US 3

Auxiliary relay 1 summer minimum set point

-30.0

-22

0.0 0

US5

°C

°F Bar Psi

Dec

int

Dec

int

US 4

Auxiliary relay 1 summer maximum set point

US5

70.0 158

50.0 725

°C

°F Bar Psi

Dec

int

Dec

int

US 5

Auxiliary relay 1 summer set point

US3 US4

°C

°F Bar Psi

Dec

int

Dec

int

US 6

Auxiliary relay 1 winter minimum set point

-30.0

-22

0.0 0

US8

°C

°F Bar Psi

Dec

int

Dec

int

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US 7

Auxiliary relay 1 winter maximum set point

US8

70.0 158

50.0 725

°C

°F Bar Psi

Dec

int

Dec

int

US 8

Auxiliary relay 1 winter set point

US6 US7

°C

°F Bar Psi

Dec

int

Dec

int

US 9

Auxiliary relay 1 summer differential

0.1 0

0.1 1

25.0 45

14.0

203

°C

°F Bar Psi

Dec

int

Dec

int

US 10

Auxiliary relay 1 winter differential

0.1 0

0.1 1

25.0 45

14.0

203

°C

°F Bar Psi

Dec

int

Dec

int

US 11

Auxiliary relay 2 operating mode 0= Not enabled 1= Always available with direct action 2= Available only when the unit is on with direct action 3= Always available with reverse action 4= Available only when the unit is on with reverse action

0 4

US 12

Analogue input configuration for auxiliary relay 2 control . Allows to select which probe value Pb1..Pb10 controls the relay

1 10

US 13

Auxiliary relay 2 summer minimum set point

-30.0

-22

0.0 0

US15

°C

°F Bar Psi

Dec

int

Dec

int

US 14

Auxiliary relay 2 summer maximum set point

US15

70.0 158

50.0 725

°C

°F Bar Psi

Dec

int

Dec

int

US 15

Auxiliary relay 2 summer set point

US13 US14

°C

°F Bar Psi

Dec

int

Dec

int

US 16

Auxiliary relay 2 winter minimum set point

-30.0

-22

0.0 0

US18

°C

°F Bar Psi

Dec

int

Dec

int

US 17

Auxiliary relay 2 winter maximum set point

US18

70.0 158

50.0 725

°C

°F Bar Psi

Dec

int

Dec

int

US 18

Auxiliary relay 2 winter set point

US16 US17

°C

°F Bar Psi

Dec

int

Dec

int

US 19

Auxiliary relay 2 summer differential

0.1 0

0.1 1

25.0 45

14.0

203

°C

°F Bar Psi

Dec

int

Dec

int

US 20

Auxiliary relay 2 winter differential

0.1 0

0.1 1

25.0 45

14.0

203

°C

°F Bar Psi

Dec

int

Dec

int

US 21

Maximum operating time of auxiliary realys 0 250 min

...

US 61

AUX 1 relay operation mode 1= only in Chiller 2= only in Heat pump 3= in Chiller and Heat pump

1 3

US 62

AUX 2 relay operation mode 1= only in Chiller 2= only in Heat pump 3= in Chiller and Heat pump

1 3

39. AUXILIARY PROPORTIONAL OUTPUTS

The outputs OUT 3 .. OUT 6 can be configured as proportional output. Each output is managed with a dedicated temperature or pressure probe; the parameters involved in the probe selection are uS23 for the output 1 and uS35 for the output 2. The function is enabled when the parameter uS22>0 for the output 1 and the parameter uS34>0 for the output 2 and at least one output is configured as auxiliary output. Par. uS22 configuration auxiliary output 1 Par. uS34 configuration auxiliary output 2 Value and function 0 = Not enabled

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1 = Function enabled, direct action, enabled also in stand-by and remote off 2 = Function enabled, direct action, enabled only if the Ichill is working in chiller or heat pump 3 = Function enabled, inverse action, enabled also in stand-by and remote off 4 = Function enabled, inverse action, enabled only if the Ichill is working in chiller or heat pump

Auxiliary Proportional output: Direct action

US46=0

US46=1

Auxiliary Proportional output: Inverse action

US46=0

US46=1

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US 22

Auxiliary proportional output n° 1 operating mode 0= Not enabled 1= Always available with direct action 2= Available only when the unit is on with direct action 3= Always available with reverse action 4= Available only when the unit is on with reverse action

0 4

US 23

Analogue input configuration for auxiliary control 1 Allows to select which probe value Pb1..Pb10 controls output

1 10

US 24

Analog output 1 summer minimum set point

-30.0

-22

0.0 0

US26

°C °F Bar Psi

Dec int Dec int

US 25

Analog output 1 summer maximum set point

US26

70.0 158

50.0 725

°C °F Bar Psi

Dec int Dec int

US 26

Analog output 1 summer set point

US24 US25

°C °F Bar Psi

Dec int Dec int

US 27

Analog output 1 winter minimum set point

-30.0

-22

0.0 0

US29

°C °F Bar Psi

Dec int Dec int

US 28

Analog output 1 winter maximum set point

US29

70.0 158

50.0 725

°C °F Bar Psi

Dec int Dec int

US 29

Analog output 1 winter set point

US27 US28

°C °F Bar Psi

Dec int Dec int

US 30

Analog output 1 summer differential

0.0 0

25.0 45

14.0 203

°C °F Bar Psi

Dec int Dec int

US 31

Analog output 1 winter differential

0.0 0

25.0 45

14.0 203

°C °F Bar Psi

Dec int Dec int

US 32

Analog output 1 minimum value 0 US33 %

US 33

Analog output 1 maximum value US32 100 %

US 34

Auxiliary proportional output n° 2 operating mode 0= Not enabled 1= Always available with direct action 2= Available only when the unit is on with direct action 3= Always available with reverse action 4= Available only when the unit is on with reverse action

0 4

US 35

Analogue input configuration for auxiliary 2 control Allows to select which probe value Pb1..Pb10 controls output

1 10

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US 36

Analog output 2 summer minimum set point

-30.0

-22

0.0 0

US38

°C °F Bar Psi

Dec int Dec int

US 37

Analog output 2 summer maximum set point

US38

70.0 158

50.0 725

°C °F Bar Psi

Dec int Dec int

US 38

Analog output 2 summer set point

US36 US37

°C °F Bar Psi

Dec int Dec int

US 39

Analog output 2 winter minimum set point

-30.0

-22

0.0 0

US41

°C °F Bar Psi

Dec int Dec int

US 40

Analog output 2 winter maximum set point

US41

70.0 158

50.0 725

°C °F Bar Psi

Dec int Dec int

US 41

Analog output 2 winter set point

US39 US40

°C °F Bar Psi

Dec int Dec int

US 42

Analog output 2 summer differential

0.0 0

25.0 45

14.0 203

°C °F Bar Psi

Dec int Dec int

US 43

Analog output 2 winter differential

0.0 0

25.0 45

14.0 203

°C °F Bar Psi

Dec int Dec int

US 44

Analog output 2 minimum value 0 US45 %

US 45

Analog output 2 maximum value US44 100 %

US 46

Operation mode under minimum value 0 1

...

US 63

AUX 1 analog output operation mode 1= only in Chiller 2= only in Heat pump 3= in Chiller and Heat pump

1 3

US 64

AUX 2 analog output operation mode 1= only in Chiller 2= only in Heat pump 3= in Chiller and Heat pump

1 3

40. DEFROST CYCLE

The following condition are mandatory to enable the defrost:

 The Ichill has to be configured as Heat pump unit  DF01>0 (defrost enabled)

dF01 Defrost configuration: 0= Not enabled 1= Start and stop for temperature / pressure 2= Start depends on probe selected by par. dF24 and stop for time duration (dF05) 3= Start depends on probe selected by par. dF24 and stop for external contact 4= Defrost only with condenser fan 5= Start from digital input and stop on probe selected by par. dF24

40.1 Automatic Defrost Procedure

Phase 1

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When the condenser temperature/pressure or evaporating pressure falls below dF02 and at least one compressor is ON, the delay between two defrost dF09 starts counting.

The display of the keyboard shows the symbol blinkking. dF09 counter is reloaded in case of power down, after a defrost cycle, when the Ichill change the operation mode (from heat pump to chiller) or when the Ichill is in STD-BY or remote OFF. dF09 counter is stopped if the last compressor of the circuit is turned off or if the pressure-temperature of the condensing-evaporating probe increase over dF02.

Phase 2

When dF09 counter is elapsed the defrost procedure starts. If one digital input is configured as “end defrost” is active, the unit waits until the contact is de-activated. If one probe is configured as combined defrost:  If the combined defrost probe of the 1st circuit is lower than dF10 and/or the combined defrost probe of

the circuit 2 is lower than dF12, the process proceeds to phase 3.

 If the combined defrost probe of the 1st circuit is higher than dF10 and/or the combined defrost probe of

the circuit 2 is higher than dF12, the process doesn’t proceed to phase 3

Phase 3

If dF07=0 the reversiong valve is activated without stopping any conmpressor and the defrost cycle is immediately activated. If df07>0:

1. Compressors are turned off

2. After dF07 / 2 the reversing valve is activated;

3. After dF07 / 2 the compressor is activated; if dF14=1 and / or dF15=1 all the compressor are activated (with a delay of dF16).

Phase 4

Defrost ON Condenser fan management:

 If dF17=0: condenser fan are always off;  If dF17=1: condenser fans start if the condensing temperature-pressure value is higher than dF18 and

the regulation is the standard chiller regulation.

ATTENTION

The condenser fan is controlled by the condensing probe even if the evaporator probe is present and configured.

The phase 4 lasts at least dF04 time; phase 4 ends:

1. If dF01=1:

 the combined probe is higher than dF11 of the 1st circuit;  the combined probe is higher than dF13 of the 2nd circuit;  when the condensing temperature/pressure is higher than dF03

2. If dF401=2: when dF05 counter is elapsed

3. If dF01=3: when the digital input configured as end defrost is deactivated

PHASE 5

If dF08 = 0 the reversing valve is switched without stopping the compressors and the defrost ends. If dF08 > 0:

1. All the compressors are switched off

2. After dF08 / 2 reversing valve is de-activated

3. After dF08 / 2 the heat pump regulation can restart

40.2 Other Information About The Defrost

If the unit is configured with one condenser FA05=0, the defrost of the two circuits starts at the same time.

ATTENTION

Before starting the 3rd phase, the dF06 counting, time delay between two circuits defrost, must be expired. If the defrost ends because of the dF05 counting (Maximum defrost time) and the dF02 configuration or with the end defrost contact, the bottom display will show, alternated with the normal measurement value, the label b1dF (circuit #1) or b2dF (circuit #2) labels to indicate the defrost end alarms.

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40.3 Forced Defrost

The function is enabled if the parameter dF19>0. It allows to make a forced defrost cycle even if the dF09 timeout counting is not expired, when the condensing/evaporating temperature/pressure is lower than dF20 setpoint for the dF19 time counting. If during the dF19 time counting the condensing/evaporating temperature/pressure rises above the value dF20+dF21 (set+differential) the function is disabled and the tF19 time is reloaded.

ATTENTION: the forced defrost is not related to the dF09 /dF06 delay times, therefore the forced defrost cycle, if condition are OK, is

immediately executed.

40.4 Combined Defrost

The function is enabled if one of the digital input is configured as NTC temperature for combined defrost of the 1st or 2nd circuit. This probe detects the external air temperature of the condenser (evaporator in heat pump) and its temperature value determines the start and the stop of the defrost cycle. Description: The defrost count-down starts when the temperature/pressure of the probe, configured as condensing/evaporating circuit 1 or 2 probe, is lower than dF02 parameter. After the dF09 counting the instruments checks the temperature probe value (configured as combined defrost circuit 1 or 2) and if it is lower than dF10 (temperature setpoint to start the defrost of the circuit 1) or dF12 (temperature setpoint to start the defrost of the circuit 2) the defrost cycle starts, otherwise the unit still runs in heat pump mode. When the temperature decreases under the dF10 or dF12 values the defrost immediately start. The defrost ends when the NTC combined defrost probe 1 or 2 increases over dF11 (circuit1) or dF13 (circuit2).

40.5 Manual Defrost

The manual defrost key function is enabled if the unit is on with at least one compressor running. The defrost start temperature/pressure of the controlled probe must be lower than dF02 setpoint value while if the combined defrost is active the detected temperature must be lower than dF10 or dF12.

At this point by pushing key in the “Defrost status of the circuit” visualization, the defrost starts. ATTENTION: the manual defrost is not related to the dF09 /dF06 delay times, therefore the forced defrost

cycle, if condition are OK, is immediately executed for both circuits.

40.6 Defrost In Unit With Two Circuits

40.6.1 Start defrost in unit with common condenser

Parameter involved: dF22 0= Independent 1= Only if both circuit conditions are satisfied 2= At least one circuit condition is satisfied

40.6.2 End defrost in unit with two condenser

Parameter involved: dF23 0= Independent 1= Both circuits have reached the conditions to stop the defrost 2= At least one circuit has reached the end defrost condition

Common condensation: possibile configuration

Parametri

dF23=0

dF23=1

dF23=2

dF22=0

not possible

(ACF1)

not possible

(ACF1)

not possible

(ACF1)

dF22=1

not possible

(ACF1)

YES YES dF22=2

not possible

(ACF1)

YES not possible

(ACF1)

Separate condensation: possibile configuration

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Paramet

er dF23=0

dF23=1

dF23=2

dF22=0

YES not possible

(ACF1)

not possible

(ACF1)

dF22=1

YES YES YES dF22=2

not possible

(ACF1)

YES not possible

(ACF1)

ATTENTION:

The configuration error ACF1 is displayed if the parameter value of dF22 and dF23 is not permitted. For only one condensing unit the dF22 and dF23 values must be not equal to 0.

40.7 Defrost With Condenser Fan Procedure

DEFROST WITH CONDENSER FANS

If dF01 = 4 defrost is activated only through the condenser fans. If the temperature detected by the probe configured as external air temperature > dF26, instead of reverse the cycle, the compressor is stopped and is activated the condenser fan. The defrost ends:

 If the combined defrost is ON, for temperature or max time  If only NTC probes are configured, for temperature or max time  If only pressure probes are configured, for max time

ATTENTION:

also if the defrost through condenser fan is activated, if the external temperature < dF26, the defrost is through hot gas (compressor ON).

If dF17 = 2 during dripping time (dF08 if different from 0) the ventilation is forced for the time set on dF08 only if the temperature detected by the probe configured as external temperature is > of the Par. dF26 value.

ATTENTION:

With defrost with only ventilation enabled the forced defrost is always with hot gas.

40.8 Defrost Parameter Description

ATTENTION IT IS NOT POSSIBLE TO DO MODIFY THE dF PARAMETERS WHEN THE DEROST CYCLE IS RUNNING. dF01 Defrost mode

0 = Defrost not enabled; 1 = Temperature/pressure defrost. The dF09 “Time delay to defrost” starts to decrease when the temperature/pressure decreases under the dF02 setpoint. The defrost ends when pressure/temperature reaches the end defrost temperature/pressure. 2 = Time duration defrost. The dF09, time delay to the defrost, starts when the temperature decreases under the dF02 setpoint (see start probe par. dF24). The defrost cycle ends after dF05 minutes. 3 = Defrost starts when the temperature/pressure decreases under the dF02 setpoint (see start probe par. dF24) and stops when the digital input configured as “digital input to start defrost” is active. The delay dF09 “Time delay to defrost” starts when the temperature decreases under the dF02 set point. The Defrost cycle ends when the digital input is active. 4 = Defrost with condenser fan 5= Defrost starts if the digital input configured as “digital input to start defrost” is active and ends when pressure/temperature reaches the end defrost temperature/pressure. dF02 Temperature / pressure to begin the time counting to next defrost. It allows to program a setpoint under which the dF09 starts counting. dF03 Temperature / pressure to end the defrost. It allows to program a temperature/pressure setpoint value to determines the end of the defrost when the probe value is rising. dF04 Minimum duration of the defrost It determines the minimum defrost time duration after starting the defrost itself even if the conditions are not more satisfied. dF05 Maximum duration of the defrost

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If dF01=2, it determines the maximum duration of the defrost and even if, for the other cases, the end defrost condition are still to be satisfied. dF06 defrost delay time between the 1st and the 2nd circuit. After the interval dF09 determined by the defrost request of one of the circuits the other 2nd circuits must wait also the time dF06 before defrosting. dF07 Compressor off time before the defrost (the led of the compressor is blinking) After the dF09 delay and before activating the defrost, the compressors are stopped for the dF07 time.

Exactly in the middle of the dF07 time the 4-way valve is activated to equalise the pressure of the unit and when dF07 is completely expired the compressors and the defrost can start.

This procedure does not respect the compressor on delay protection therefore the compressor is immediately turned off and then on. If dF07 = 0 the compressor is not stopped and the 4-way valve is immediately turned. dF08 Compressor off time after the defrost (the led of the compressor is blinking) After the defrost cycle the compressors are stopped for the dF08 time. Exactly in the middle of the dF07 time the 4-way valve is activated to equalise the pressure of the unit and to drain the external exchange unit, when dF08 is completely expired the unit restart in heat pump mode. This procedure does not respect the compressor on delay protection therefore the compressor is immediately turned off and then on. If dF08 = 0 the compressor is not stopped and the 4-way valve is immediately turned. DF09 Delay time to next defrost It starts when the condensing/evaporating temperature/pressure probe value is lower than dF02 setpoint. This time is reloaded if the power supply fails, after a defrost cycle or from a digital input request of defrost. The time counting is interrupted if the compressor is turned off or if the temperature/pressure is higher then dF02. dF10 Temperature setpoint to start a combined defrost of the circuit #1. It allows to set a temperature value to determines the beginning of a combined defrost. After the dF09 counting the NTC probe of the combined defrost of the circuit #1 is compared to the dF10 setpoint, if the value is lower the defrost starts otherwise the unit runs in heat pump mode and when the temperature decreases under dF10 the defrost immediately starts. dF11 Temperature setpoint to end a combined defrost of the circuit #1. It allows to set a temperature value to determine the end of a combined defrost. When the NTC probe of the combined defrost of the circuit #1 becomes higher than dF10 setpoint the defrost cycle stops. dF12 Temperature setpoint to start a combined defrost of the circuit #2. It allows to set a temperature value to determine the beginning of a combined defrost. After the dF09 counting the NTC probe of the combined defrost of the circuit #2 is compared to the dF12 setpoint, if the value is lower the defrost starts otherwise the unit runs in heat pump mode and when the temperature decreases under dF12 the defrost immediately starts. dF13 Temperature setpoint to end a combined defrost of the circuit #2. It allows to set a temperature value to determine the end of a combined defrost.

When the NTC probe of the combined defrost of the circuit #2 becomes higher than dF13 setpoint the defrost cycle stops.

dF14 All the resources on during the defrost of the circuit #1 0= Not enabled 1= Enabled dF15 All the resources on during the defrost of the circuit #2 0= Not enabled

1= Enabled

dF16 Compressor step delay time in defrost. dF17 Condensing fan control during defrost and dripping cycle

0= Not enabled 1 = Enabled in defrost 2= Enabled in defrost and in dripping time If dF17 = 0: During the defrost the fan control is not active. If dF17 = 1: when the condensing temperature/pressure value increases over dF18 the fans are turned on. the fan control is determined by the same algorithm used in chiller mode. If dF17 = 2: during the dripping time (dF08 <>0) the fan are turned on for the time duration set in dF08 . dF18 Pressure / temperature setpoint to force the fans on during the defrost When the temperature/pressure rises over this value the fan are turned on at the maximum speed. dF19 Time delay before starting a forced defrost It determines a delay time before starting the defrost cycle dF20 Temperature / pressure setpoint to force a defrost

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It determines a temperature/pressure setpoint under which the dF19 starts counting, when dF19 is expired if the temperature/pressure is still lower than dF20 the defrost is immediately executed. ATTENTION If during the dF19 counting the temperature rises over df20+dF21(differential) the process is aborted and the dF19 time reloaded.

dF21 Forced defrost differential dF22 defrost mode for unit with two circuits

Operative mode: 0= Independent 1= The condition are satisfied in both circuits 2= At least one circuit has reached the start condition dF23 It determines the end of the defrost for unit having two circuit and common condensing ventilation Operative mode: 0= Independent 1= The end defrost condition are satisfied In both circuits 2= At least one circuit has reached the end defrost condition dF24 Start / stop defrost probe Start / stop defrost from analog input 0= start and stop with condenser temperatur / pressure probe 1= start with evaporator pressure probe / stop with condenser temperatur / pressure probe 2= start with condenser temperatur / pressure probe / stop with evaporator pressure probe 3= start and stop with evaporator pressure probe

40.9 Defrost Dynamic Set Point

It is possible to modify the start defrost set point according to outside temperature. Offset set point if dF37>0

Offset set point if dF37<0

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41. PRODUCTION OF SANITARY HOT WATER

The sanitary hot water production is enabled when the machine is switched on and disabled if the machine is OFF or in STAND-BY. The Ichill has to be configured for the proportional regulation (St11=0) and not in neutral zone. In case of machine with valve 1 and valve 2 in gas circuit and cooling and sanitary water active at the same time, the number of compressors to use is determined by CO78 parameter. Two temperature probes need to be configured when the function is enabled:

 Probe 1: it is used to determine the temperature of the sanitary water  Probe 2: it can be used to stop the sanitary water production for high temperature. As an alternative to

Probe 2 it is possible ti choose another probe setting FS48 parameter.

Configurable proportional band and set-point are used to regulate the production of sanitary water; when the sanitary water function is enabled, you will see symbol lighted on the display.

The production of sanitary water can only be requested when the temperature detected by Probe n°1 is below the FS03 set-point – band FS04; all the compressors are called into action when the function is enabled. The sanitary water set-point can be viewed and modified on the display by pressing the SET button. It is possible to set a minimum temperature under which the sanitary water heaters are switched on (low temperature protection). It is possible to use a second sanitary water set point by time schedule (parameters ES19..ES33, internal clock is necessary) or by digital input (opportunely configured). Inside the time band or when the digital input is active, to the set point is applied an offset determined by ES32 parameter and the new differential is ES33.

Compressors regulation:

- FS49=0 the compressors are switched on when sanitary temperature < FS03 (sanitary water

set point) – FS04 (proportional band); all the compressors are switched on with a delay of CO03 seconds each other

- FS49=1 the proportional band is divided by the number of compressors; at every step

(proportional band/number of compressors) a compressor will be switched on

 FS49=0 Example for machine with 3 compressors

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 FS49=1 Example for machine with 3 compressors

Sanitary water heaters:

Sanitary water is produced using mainly the compressors; the sanitary water heaters are only used to produce sanitary water if one or more compressors are not available for regulation (due to an alarm of a compressor, activation of the unloading function,..) or if the sanitary water set-point is not reached within a configured timeframe (described in greater detail below). The FS08 parameter allows you to determine if the sanitary water heaters can be used when a compressor is not available. When the sanitary heaters are activated, the regulation band is divided according to the number of compressors and sanitary heaters available (see figure below).

Max time for reaching the sanitary water set-point

A counter determines the maximum time for reaching the sanitary water set-point as from the moment the production of sanitary water is requested; once this time has elapsed (parameter FS09) there are 2 options:

 If FS07=0, enable all the compressors (if not already enabled)  If FS07=1, enable all the compressors and all the heating elements

After all the available steps (compressors and heaters) have been enabled, they remain activated until the sanitary water set-point has been reached. At which point the heating elements are switched off immediately, while the compressors are switched off in order, with a CO03 delay between each one.

In the event of sanitary water probe 1 faulty (the sanitary water regulation probe), the sanitary water function is stopped and disabled; the controller will regulate normally in chiller or heat pump mode. In the event of sanitary water probe 2 faulty (not involved in the regulation), the alarm is signalled without affecting heat regulation in any way; sanitary water will continue to be produced normally even if the display probe is not working properly. If there is an error with the heat regulation probe (for the chiller or heat pump) during production of sanitary water, the machine will continue to operate but the regulation of the chiller or heat pump is disabled and sanitary water continues to be produced.

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41.1 Anti-Legionella Function

The FS12 parameter allows you to enable the anti-legionella function.  FS12=0 intervals between two anti-legionella cycles; the process will have to be repeated after the

FS13 time since the last anti-legionella production procedure was carried out. The counter continues to operate, regardless of whether the machine is on or off or in standby; if the power is OFF, the value of the counter is recorded and then continued when the machine is next started up.

 FS12=1 time-bands; Ichill with internal real time clock is required (you need to configure the day of

activation FS18 and the start time FS17).  FS12=2 daily time band (start time FS17 is needed) To disable the function is necessary to configure FS12=0 and FS13=0 or FS12=1 and FS18=0 or FS12=2

and FS17=0:00. The function is enabled when the machine is ON. If the request for an anti-legionella cycle is made when the

machine is switched off, the cycle will start immediately when the machine is next switched on and the priority is given to anti-legionella cycle. If instead heat regulation is prioritized, the anti-legionella cycle will run when the chiller/heat pump set-point is reached. The function must remain active for the minimum time configured with parameter FS19 (activated when the temperature of the sanitary water reaches the anti-legionella set-point) and can last a maximum of FS29 minutes. If FS02=0 the Anti-legionella cycle starts when cooling/heating set point is reached.

Compressors and sanitary heaters in Anti-legionella cycle FS46=0 Compressors and heaters used at the same time in Anti-legionella cycle

When the anti-legionella cycle is active, all the compressors and heating elements configured for the sanitary water are switched on; once the set-point (FS14) is reached, the compressors are switched off (delayed of CO04 time) while the heating elements are switched off when the the set-point (FS14) + band (FS20) is reached. The anti-legionella cycle is enabled for FS19 time; during this time the machine works to maintain the antilegionella set point. The Anti-legionella cycle lasts maximum FS29 minutes. It is possible to switch off the compressors if the sanitary water temperature reaches FS50 temperature. At the end of this procedure, the controller returns to the production of sanitary water or normal heating/cooling regulation. If the FS02 parameter (operating priority) gives priority to heating/cooling regulation and the production of anti-legionella needs to be enabled, then the heat regulation set-point has to be reached beforehand. The anti-legionella cycle has to end before heating/cooling regulation can start, even if the FS02 parameter gives the priority to heating/cooling regulation.

FS46=1 First compressors then heaters are used in Anti-legionella cycle

At first the compressors are switched on; when FS50 set point is reached, all the compressors are switched off and sanitary heaters are switched on to reach the Anti-legionella set point (FS14) + band (FS20). Once reached, the instrument works to maintain the set point for FS19 time; if water temperature falls down below FS14 the heaters are switched on and if falls down below FS 50 compressors are switched on. The Anti-legionella cycle lasts maximum FS29 minutes.

FS46=2 Only heaters are used in Anti-legionella cycle

Only sanitary heaters are used in the Anti-legionella cycle (compressors off); when FS14 + FS20 temperature is reached the heaters are switched off. Once reached the set point, the instrument works to maintain the set point for FS19 time; the Anti-legionella cycle lasts maximum FS29 minutes.

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FS46=3 Only compressors are used in Anti-legionella cycle

Only compressors are used in the Anti-legionella cycle (heaters off); when FS14 + FS20 temperature is reached the compressors are switched off. Once reached the set point, the instrument works to maintain the set point for FS19 time; the Anti-legionella cycle lasts maximum FS29 minutes.

Priority management (sanitary water or heating/cooling) If FS02 =0, priority is given to the production of chilled/hot water; sanitary hot water is produced once the

chiller/heat pump requests has been satisfied. The production of anti-legionella is stopped in case of chiller/heat pump requests.

If FS02=1, priority is given to the production of sanitary water (or anti-legionella). Chilled water or hot water can be produced once the need for sanitary hot water has been satisfied (if required).

If FS02=2, if the digital input configured as “Sanitary water priority” is active, the priority is given to the production of sanitary water.

If defrosting is required, this takes priority over the production of sanitary water or anti-legionella even if FS02=1.

41.2 Water Pumps Management

The sanitary water pump is managed in sanitary hot water regulation or during the anti-legionella cycle. Evaporator water pump:

 if CO16=1 (evaporator water pump always on), also in sanitary water regulation the water pump is ON.

If the machine is forced to work only in sanitary water (digital input “only sanitary water” is active), the evaporator water pump is:

o OFF if FS47=1 o ON if FS47=0

 if CO16=2 (evaporator water pump on if at least a compressor is on), the parameter FS47 allows to

choose if the water pup is on or off in case of sanitary hot water production. If the machine has the sanitary valves placed in the gas circuit, in case of contemporary cooling and sanitary hot water production, the evaporator water pump is on.

If only one water pump is needed for cooling, heating and sanitary water, the evaporator water pump has to be configured.

The times for managing the sanitary water pump are as follows:  The valve 1 and valve 2 are switched with the delay of FS27 seconds from start-up of the sanitary water

pump  The sanitary water pump is switched off with the delay of FS28 seconds from switching valve 1 and valve 2

The sanitary water flow switch is operated according to the times of the evaporator flow switch (parameter AL15, AL16, AL17 and AL18).

Sanitary water flow switch, solar panel flow switch and overload sanitary water pump.

It is possible to enable the sanitary water flow switch by setting appropriately parameters AL65..AL68. It is possible to enable the solar panel flow switch by setting appropriately parameters AL69..AL72.

If sanitary water flow switch or sanitary water pump overload is active, sanitary water regulation is disabled; heating and cooling regulation proceed normally. If solar panel flow switch is active, solar panel regulation is disabled; heating and cooling regulation proceed normally.

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41.3 Sanitary Water Second Set Point

The sanitary water second set point can enabled by time bands (ES19..ES33 parameters) or digital input properly configured. In case of sanitary water second set point enabled by time bands, the Ichill must have internal clock.

Par. ES25 – ES31 0= Function disabled

1= 1

period enabled 2= 2nd period enabled 3= 1st and 2nd periods enabled 4= 3rd period enabled 5= 1st and 3rd periods enabled 6= 2nd and 3rd periods enabled 7= 1st, 2nd and 3rd periods enabled

Inside the time band or when the digital input is active to the sanitary water set point is applied an offset (parameter ES32) and the new differential for the regulation is ES33.

41.4 Sanitary Hot Water Production: Valves In Water Circuit ___ Fs01=1 (Air/Water, Water/Water Unit)

41.4.1 - Sanitary hot water operation when the unit is producing hot water

When sanitary hot water production is required (and it has priority), the sequence of operation is the following:

 the sanitary water pump is switched on  after a delay of FS27 seconds, sanitary valve 1 is swithed on  after a delay of FS10 seconds the sanitary valve 2 is switched off

Sanitary hot water is produced until the FS03 set-point is reached. Once the sanitary water set-point is reached, the sequence of operation is the following:

 sanitary valve 2 is switched on  after a delay of FS10 seconds the sanitary water valve 1 is switched off  after a delay of FS28 seconds the sanitary water circulation pump is switched off

Condenser fans are managed normally.

The defrost takes priority over the production of sanitary water.

If the controller determines the need for a defrosting cycle during the production of sanitary water, the Ichill stops the sanitary hot water operation to activate the defrost procedure:

 all compressors and heaters are stopped  the sanitary valve 2 is switched on  after the FS10 delay sanitary water valve 1 is switched off  after a delay of FS28 seconds the sanitary water pump is switched off

The defrost can now start as per the normal procedure. At the end of the defrosting cycle:

 If there is a need to produce sanitary water, the compressors and any heating elements will be switched

on. After the FS11 delay from the end of the dripping phase, sanitary water valve 1 is switched on and, after the FS10 delay, sanitary water valve 2 is switched off.

 If there is no need to produce sanitary water, the controller continues with normal heat regulation.

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41.4.2 - Sanitary hot water operation when the unit is producing cold water

When the production of sanitary water is required (and it has priority), it is necessary to reverse the cycle as follows:

 the compressors are switched off  after the dF07/2 delay the 4-way valve status is reversed  after dF07/2 the compressors are switched on  after a delay of FS27 seconds valve 1 is switched on  after the FS10 delay the sanitary water valve 2 is switched off

The production of sanitary water stops once the set-point is reached and it will be possible to return to produce cold water (if needed):

 the compressors are switched off  the valve 2 is switched on  after the FS10 delay the sanitary water valve 1 is switched off  after a delay of FS28 seconds the sanitary water circulation pump is switched off  after a delay of dF08/2 the 4-way valve status is reversed  after a delay of dF08/2 the compressors are switched on as per normal if required by the chiller

regulator

41.5 Sanitary Hot Water Production: Valves In Gas Circuit ___ Fs01=2 (Air/Water, Water/Water Unit)

41.5.1 Sanitary hot water operation when the unit is producing hot water

When sanitary hot water production is required (and it has priority), the sequence of operation is the following:

 the sanitary water pump is switched on  after a delay of FS27 seconds the valve 1 is activated  after a delay of FS10 seconds the sanitary water valve 2 is switched off

Sanitary hot water is produced until the FS03 set-point is reached. Once the sanitary water set-point is reached:

 sanitary water valve 2 is switched on  after a delay of FS10 seconds the sanitary water valve 1 is switched off  after a delay of FS28 seconds the sanitary water circulation pump is switched off

Condenser fans are managed normally.

The defrost takes priority over the production of sanitary water.

If the controller determines the need for a defrosting cycle during the production of sanitary water, the Ichill stops the sanitary hot water operation to activate the defrost procedure:

 all compressors and heaters are stopped  the valve 2 is activated  after the FS10 delay the sanitary valve 1 is switched off  after a delay of FS28 seconds the sanitary water pump is switched off

The defrost can now start as per the normal procedure. At the end of the defrosting cycle:

 If there is a need to produce sanitary water, the compressors and any heating elements will be switched

on. After the FS11 delay from the end of the dripping phase, sanitary water valve 1 is enabled and, after the FS10 delay, sanitary water valve 2 is switched off.

 If there is no need to produce sanitary water, the controller continues with normal heat regulation.

41.5.2 - Sanitary hot water operation when the unit is producing cold water

When the production of hot sanitary water is required, the sequence of operation is different and depend on the status of the compressors:

a) One or more compressors are switched on for production of chilled water

If the production of sanitary hot water is required during operation in chiller mode:

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 the sanitary water circulation pump is switched on  after a delay of FS27 seconds the sanitary water valve 1 is switched on  after the FS10 delay the sanitary water valve 2 is switched off

The following two cases could occur during the production of sanitary hot water:  The sanitary water set-point is reached when the chiller is working (the chiller set-point is not

reached):

 the sanitary water valve 2 is switched on  after the FS10 delay the sanitary water valve 1 is switched off  after a delay of FS28 seconds the sanitary water circulation pump is switched off

At the end of this phase, if necessary, the machine continues to regulate in chiller mode.

 The regulation temperature reaches the chiller set-point (parameter ST01) and the sanitary hot

water production is working:

 the sanitary water circulation pump stays on  the sanitary water valve 2 is switched on  after the FS10 delay the sanitary water valve 1 and the compressors are switched off  after the DF07/2 delay the 4-way valve status is reversed  after dF07/2 the compressors are switched on again to produce hot sanitary water  after the FS11 delay from the 4-way valve switching, the sanitary water valve 1 is switched

 after the FS10 delay the sanitary water valve 2 is switched off

Once the sanitary water set-point is reached:

 the sanitary water valve 2 is switched on  after the FS10 delay sanitary water valve 1 is switched off  after FS28 seconds the sanitary water circulation pump and the compressors are

switched off

 after the dF08/2 delay the status of the 4-way valve is reversed

If the sanitary water production is working and the temperature detected by the chiller regulation probe is greater than ST01+ST07 (cold water required), the sequence of operatiuon is the following:

 the sanitary water pump will remain on  the sanitary valve 2 is switched on  after the FS10 delay the sanitary water valve 1 is switched off  the compressors are switched off  after the DF08/2 delay the 4-way valve status is reversed  after a delay of dF08/2 the compressors are switched on to produce chilled water and

sanitary water

When the sanitary water set-point is reached:

 sanitary water valve 2 is switched on  after the FS10 delay the sanitary water valve 1 is switched off  after a delay of FS28 seconds the sanitary water circulation pump is switched off

b) None of the compressors are switched on for the production of chilled water

In this case, the cycle is reversed as follows:

 the 4-way valve status is reversed  after dF07/2 the compressors are switched on  the sanitary water pump switches on after the FS11 delay from start-up of the compressors  after a delay of FS27 seconds the sanitary water valve 1 is switched on  after the FS10 delay the sanitary water valve 2 is switched off.

Once the sanitary water set-point is reached, the sequence of operation is the following:

 the sanitary valve 2 is switched on  after the FS10 delay the sanitary water valve 1 and the compressors are switched off  after a delay of FS28 seconds the sanitary water circulation pump is switched off

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 after the DF07/2 delay the 4-way valve status is reversed and normal regulation is

restored. If chilled water is required during the production of sanitary water, operation is the same as in the previous case.

42. SOLAR PANEL MANAGEMENT

Though appropriate configuration of FS55 and FS56 parameters is possible to use the solar panel in heating or for sanitary hot water production. The solar panel is managed through the valve and water pump control; their status depend from:

 solar panel temperature  regulation probe (typically heating regulation probe or sanitary water regulation probe); this probe is

defined in FS57 and FS58 parameters

42.1 Solar Panel In Sanitary Hot Water

 Compressors and solar panel in integration to sanitary water (FS55=1):

If:

solar panel temperature – sanitary temperature > FS59 (Dt to enable solar panel in sanitary water)

the solar panel are enabled to work; sanitary probe is defined by FS57 parameter (it is possible to set another probe, if needed). Compressors are normally managed by sanitary hot water temperature and sanitary water set point.

 if sanitary water temperature < FS23-FS24, the valve of the solar panel is open and the water pump is on  if sanitary water temperature > FS23, , the valve of the solar panel is close and the water pump is off

 Solar panel in heating mode (FS55=2)

If:

solar panel temperature – sanitary temperature > FS59 (Dt to enable solar panel in sanitary water)

the solar panel are enabled to work; sanitary probe is defined by FS57 parameter (it is possible to set another probe, if needed). At first compressors are not used for sanitary hot water. It is possible to set a maximum time to use solar panel (FS61); when this time is elapsed and sanitary set point is not reached, the solar panel are disabled and compressors are switched on. The sanitary water pump runs when solar panel are enabled. In regulation, if solar panel temperature – sanitary temperature < FS59 the solar panel are disabled and the hot sanitary water is done by compressors.

Dt control is done only at the time of the request of sanitary hot water; at this moment, if Dt< FS59 the solar panel are not used and compressors are used for heating.

42.2 Solar Panel In Heating Mode

 Solar panel in integration mode (FS56=1)

If:

solar panel temperature – heating temperature > FS60 (Dt to enable solar panel in heating)

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the solar panel are enabled to work (valve is open and water pump on); heating probe is defined by FS58 parameter (it is possible to set another probe, if needed). Compressors are normally managed by heating regulation.

 Solar panel in Heating (FS56=2)

If:

solar panel temperature – heating temperature > FS60 (Dt to enable solar panel in heating)

the solar panel are enabled to work; heating probe is defined by FS58 parameter (it is possible to set another probe, if needed). At first compressors are not used for heating. It is possible to set a maximum time to use solar panel (FS61); when this time is elapsed and sanitary set point is not reached, the solar panel are disabled and compressors are switched on.

In regulation, if solar panel temperature – heating temperature < FS60 the solar panel are disabled and the heating is done by compressors.

Dt control is done only at the time of the request of heating; if Dt< FS60 the solar panel are not used and compressors are used for heating.

43. UNIT WITH HYBRID EXCHANGERS (AIR / WATER UNIT)

The parameter CF95=1 enables this function. This unit manages two exchangers by relay:

- Hybrid exchanger 1

- Hybrid exchanger 2

Summer operation mode:

Winter operation mode:

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44. GEOTHERMAL FREE COOLING

Outputs managed:

 relay for valve/pump management  0..10V analog output to control a modulating valve

In heating the relay is OFF and the analog output is 0V. Free cooling operation mode:

 CF97=2: Free cooling is the only cooling source  CF97=3: Free cooling and compressors work together to produce cooling. The compressors work

according their standard regulation.

Free cooling management: 2 probes are needed, selected from those configured in the instrument (1 Pb1, 2=Pb2, etc.); parameters to select the probes are FS41 and FS42.

 if T1 temperature – T2 temperature  FS21, the Free cooling is enabled and the relay and analog

output are manages as figures below

 if T1 temperature – T2 temperature < FS21 – FS22, the Free cooling is disabled

Analog output management:

Digital output management:

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Parameter Description min max udm

FS21

Temperature differential to enable the freecooling function

0 25.0

°C °F

FS22

Temperature differential for the free cooling regulation

0.1 0 25.0 45

°C

°F …. FS34 Free cooling water pump OFF time if chiller only Free cooling

0 250 min

FS35 Free cooling water pump ON time if chiller only Free cooling

0 250 sec

FS36 Free cooling maximum time

0 250 min

FS37 Set point Free cooling

-50.0

-58

0.0 0

70.0 158

50.0 725

°C

°F

bar

psi FS38 Proportional band Free coling

0.1 0

0.1 1

25.0 45

14.0 203

°C

°F

Bar

Psi FS39 Minimum value Free cooling analog output

0 100 %

FS40 Maximum value Free cooling analog output

0 100 %

FS41 T1 probe selection for Free cooling

0=disabled, 1=Pb1, 2=Pb2, etc.

0 10

FS42 T2 probe selection for Free cooling

0=disabled, 1=Pb1, 2=Pb2, etc.

0 10

FS43 Outside temperature set point to force the maximum speed of

condenser fan

0 1

 Only free cooling for cooling (CF97=2)

Compressors are not used for cooling. Evaporator and condenser water pumps are managed according to chiller probe and St01 set point; free cooling valve/pump is managed according chiller probe and FS37 set point (or St01 if St01<FS37). If the free cooling set point is not reached in FS36 minutes (0 = function disabled) or when the free cooling set point is reached, the free cooling will be disabled for FS34 minutes. After this time the valve/pump is switched on for FS35 seconds and, when this time is elapsed the controller verify if T1 temperature – T2 temperature  FS21 and if free cooling temperature > FS37. If both condition are true, the free cooling valve/pump is activated. If FS34=0 and FS35=0 this function is disabled.

 Compressors and free cooling used for cooling (CF97=2)

Compressors are managed as standard chiller regulation. Free cooling valve/pump is managed according chiller probe and FS37 set point (FS37 has to be set >St01); the regulation is done like figure above.

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Low temperature protection

If the temperature detected by probe selected with FS62 parameter is lower than FS63 set point, the free cooling is disabled. The free cooling will be enabled when temperature detected by probe selected with FS62 parameter is higher than FS63 + FS64.

44.1 FAN SPEED CONTROL IF COMPRESSORS AND FREE COOLING ARE USED FOR COOLING (CF97=3)

When the free cooling is not active the condenser fan speed is managed like standard regulation. If free cooling is active:

 outside temperature > FS43 + FS44: condenser fan speed is forced at maximum speed  outside temperature < FS43: when outside temperature decreases below FS43 temperature, after

FS45 minutes the condenser fan speed is managed as standard regulation

45. RECOVERY FUNCTION

The recovery function is Enabled if:

1 Par. rC01 not equal to 0. 2 Chiller running mode. 3 The condensing temperature / pressure is lower than set rC06 –rC07 (differential). 4 The input/output resources are configured 5 The remote recovery digital input is activated.

The recovery function is NOT Enabled if:

1 Par. rC01 = 0. 2 Heat pump running mode, remote OFF or stand by. 3 The condensing temperature / pressure is higher than set rC06. 4 The input/output resources are not properly configured (alarm ACF9). 5 The remote recovery digital input is not activated.

NECESSARY RESOURCE FOR THE RECOVERY OF THE CIRCUIT #1

Output relay configured as valve for recovery circuit #1. Remote recovery digital input for circuit #1. Condenser probe of the circuit #1.

NECESSARY RESOURCE FOR THE RECOVERY OF THE CIRCUIT #2

Output relay configured as valve for recovery circuit #2. Remote recovery digital input for circuit #2 Condenser probe of the circuit #2.

45.1 UNIT WITH TWO SEPARATE IDRAULIC CIRCUITS

FUNCTIONING Par. rC01 = 1 unit with two separate circuits: CIRCUIT # 1

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With the recovery function enabled, the unit running in chiller and with the temperature/pressure proper condition, the unit can start the recovery of the first circuit if the corresponding digital input is active. When the digital input is active the relay of the valve for the recovery of the first circuit is activated.

CIRCUIT # 2

With the recovery function enabled, the unit running in chiller and with the temperature/pressure proper condition, the unit can start the recovery of the second circuit if the corresponding digital input is active. When the digital input is active the relay of the valve for the recovery of the second circuit is activated.

After starting the function, if the digital input becomes not active the recovery function runs for the time set in rC04 before stopping.

Between the end and the next recovery function the instrument waits the time set in the parameter rC05 even if the digital input is activated again.

RECOVERY START AND STOP OF THE TWO CIRCUITS CONFIGURED WITH CAPACITY STEPS

During the start and the stop of the function the time delay rC02 and rC03 are not counted and the valve is immediately turned on or off.

RECOVERY START OF THE TWO CIRCUITS CONFIGURED WITH MORE THAN ONE CAPACITY STEP

Circuits 1 and 2 configured with more than one step of power (eg each circuit with three compressors), if the thermoregulation requires to turn on one or more resources and the recovery is activated from the digital input the unit turns on only one step and then waits the rC02 delay (this delay keep off all the other steps after the recovery is started). After the delay the recovery valve is turned on and, after the rC03 time (this delay keeps off all the other steps after the recovery is started), the other resources if necessary are turned on.

RECOVERY STOP OF THE TWO CIRCUITS CONFIGURED WITH MORE THAN ONE CAPACITY STEP

Circuits 1 and 2 configured with more than one step of power (Eg. each circuit with three compressors). After the rC04 time delay (minimum on time of the recovery function when activated) if the digital input of the recovery is not active the units stops the new resources for the time set in rC02. After this delay the recovery valve is turned off and the regulation restarts with its normal running condition.

RECOVERY START OF THE TWO CIRCUITS WITH ALL THE CAPACITY STEPS ACTIVATED

When the system is running with 100% (eg all the three compressor of a circuit are on) of power and the digital input start the recovery function: before turning on the recovery valve one of the step (depending on the time running hours), is turned off for the time set in rC02. After rC02 the recovery valve is turned on. Then, after the rC03 time (this delay keeps off all the other steps after the recovery is started) the resource forced off if necessary is turned on again.

RECOVERY STOP OF THE TWO CIRCUITS WITH ALL THE CAPACITY STEPS ACTIVATED

When the system is running with 100% (eg all the three compressor of a circuit are on) of power and the digital input stop the recovery function: after the rC04 time delay (minimum on time of the recovery function when activated) and before turning off the recovery valve, one of the step is turned off for the time set in rC02. When the delay is expired the unit turns off the recovery valve and and the regulation restarts with its normal running condition.

ATTENTION:

For both the circuits: when the compressor are off because of the thermoregulation and the digital input of the recovery function is active, the recovery valve is disabled.

45.2 UNIT WITH TWO IDRAULIC CIRCUIT WORKING IN PARALLEL

FUNCTIONING

Par. rC01 = 2 unit with two circuits working in parallel: The recovery function from the digital inputs is divided in two steps:

UNIT WITH ONE CIRCUIT RUNNING

If the recovery function is enabled and if the condenser temperature/pressure condition are within the limits that circuit starts the recovery when one of the digital inputs is activated. With active digital input the recovery valve of the circuit is on.

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UNIT WITH BOTH THE CIRCUITS RUNNING

If recovery function is enabled, if the condenser temperature/pressure condition are within the limits the circuit #1 starts the recovery (recovery valve #1 on) when the digital input #1 is activated and the circuit #2 starts the recovery (recovery valve #2 on) when the digital input #2 is activated.

After starting, the recovery function will run at least for the time set in parameter rC04 (minimum time with recovery on). Between the end of a recovery cycle and the next start the unit waits the time set in Par. rC05 before starting it again.

RECOVERY START–STOP OF THE CIRCUITS 1 AND 2 CONFIGURED WITH ONE STEP EACH

Both for recovery start or stop, the delay time rC02 and rC03 are not counted and the recovery valve is immediately turned on or off.

RECOVERY START OF THE TWO CIRCUITS CONFIGURED WITH MORE THAN ONE CAPACITY STEP

RECOVERY STOP OF THE TWO CIRCUITS CONFIGURED WITH MORE THAN ONE CAPACITY STEP

RECOVERY START OF THE TWO CIRCUITS WITH ALL THE CAPACITY STEPS ACTIVATED

When the system is running with 100% (Eg. all the three compressor of a circuit are on) of power and the digital input start the recovery function: before turning on the recovery valve one of the step (depending on the time running hours), is turned off for the time set in rC02. After rC02 the recovery valve is turned on. Then, after the rC03 time (this delay keeps off all the other steps after the recovery is started) the resource forced off if necessary is turned on again.

RECOVERY STOP OF THE TWO CIRCUITS WITH ALL THE CAPACITY STEPS ACTIVATED

When the system is running with 100% (Eg. all the three compressor of a circuit are on) of power and the digital input stop the recovery function: after the rC04 time delay (minimum on time of the recovery function when activated) and before turning off the recovery valve, one of the step is turned off for the time set in rC02. When the delay is expired the unit turns off the recovery valve and and the regulation restarts with its normal running condition.

ATTENTION:

For both the circuits: when the compressor are off because of the thermoregulation and the digital input of the recovery function is active, the recovery valve is disabled.

46. CONDENSER TEMPERAURE / PRESURE CONDITION TO ENABLE/DISABLE THE RECOVERY CYCLE

The recovery can be disabled depending on the condenser condition to avoid a possible high pressure alarm. The function can be executed by programming the analogue input as condenser transducer 1 or 2 (Par CF07=0 temperature control or CF07= 1 pressure control).

FUNCTIONING

46.1 RECOVERY DISABLED

With the recovery function is activated: if the temperature/pressure is equal or higher than the set rC06 (limit of the recovery cycle) the recovery cycle, of the circuit detected by transducer, is disabled. When the recovery is disabled the bottom display shows the following blinking icons: b1rC = for circuit 1, b2rC = for circuit 2.