Carel EVD Evolution Twin User Manual

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CABLES

TOGETHER

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Integrated Control Solutions & Energy Savings

User manual

Driver for 2 electronic expansion valves

EVD evolution twin

NO POWER

& SIGNAL

CABLES

TOGETHER

READ CAREFULLY IN THE TEXT!

ENG

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

WARNINGS

CAREL INDUSTRIES bases the development of its products on decades of experience in HVAC, on the continuous investments in technological innovations to products, procedures and strict quality processes with in-circuit and functional testing on 100% of its products, and on the most innovative production technology available on the market. CAREL INDUSTRIES and its subsidiaries/aliates nonetheless cannot guarantee that all the aspects of the product and the software included with the product respond to the requirements of the nal application, despite the product being developed according to start-of-the-art techniques. The customer (manufacturer, developer or installer of the nal equipment) accepts all liability and risk relating to the conguration of the product in order to reach the expected results in relation to the specic nal installation and/or equipment. CAREL INDUSTRIES may, based on specic agreements, acts as a consultant for the successful commissioning of the nal unit/application, however in no case does it accept liability for the correct operation of the nal equipment/ system.

The CAREL INDUSTRIES product is a state-of-the-ar t product, whose operation is specied in the technical documentation supplied with the product or can be downloaded, even prior to purchase, from the website www.carel.com. Each CAREL INDUSTRIES product, in relation to its advanced level of technology, requires setup/conguration/programming/commissioning to be able to operate in the best possible way for the specic application. The failure to complete such operations, which are required/indicated in the user manual, may cause the nal product to malfunction; CAREL INDUSTRIES accepts no liability in such cases. Only qualied personnel may install or carry out technical service on the product. The customer must only use the product in the manner described in the documentation relating to the product.

In addition to observing any further warnings described in this manual, the following warnings must be heeded for all CAREL INDUSTRIES products:

• prevent the electronic circuits from getting wet. Rain, humidity and all

types of liquids or condensate contain corrosive minerals that may damage the electronic circuits. In any case, the product should be used or stored in environments that comply with the temperature and humidity limits specied in the manual;

• do not install the device in particularly hot environments. Too high

temperatures may reduce the life of electronic devices, damage them and deform or melt the plastic parts. In any case, the product should be used or stored in environments that comply with the temperature and humidity limits specied in the manual;

• do not attempt to open the device in any way other than described in the

manual;

• do not drop, hit or shake the device, as the internal circuits and mechanisms

may be irreparably damaged;

• do not use corrosive chemicals, solvents or aggressive detergents to clean

the device;

• do not use the product for applications other than those specied in the

technical manual.

All of the above suggestions likewise apply to the controllers, serial boards, programming keys or any other accessory in the CAREL INDUSTRIES product portfolio. CAREL INDUSTRIES adopts a policy of continual development. Consequently, CAREL INDUSTRIES reserves the right to make changes and improvements to any product described in this document without prior warning. The technical specications shown in the manual may be changed without prior warning.

The liability of CAREL INDUSTRIES in relation to its products is specied in the CAREL INDUSTRIES general contract conditions, available on the website www.carel.com and/or by specic agreements with customers; specically, to the extent where allowed by applicable legislation, in no case will CAREL INDUSTRIES, its employees or subsidiaries/aliates be liable for any lost earnings or sales, losses of data and information, costs of replacement goods or services, damage to things or people, downtime or any direct, indirect, incidental, actual, punitive, exemplary, special or consequential damage of any kind whatsoever, whether contractual, extra-contractual or due to negligence, or any other liabilities deriving from the installation, use or impossibility to use the product, even if CAREL INDUSTRIES or its subsidiaries are warned of the possibility of such damage.

DISPOSAL

INFORMATION FOR USERS ON THE CORRECT HANDLING OF WASTE ELECTRICAL AND ELECTRONIC EQUIPMENT ( WEEE) In reference to European Union directive 2002/96/EC issued on 27 January 2003 and the related national legislation, please note that:

1. WEEE cannot be disposed of as municipal waste and such waste must be collected and disposed of separately;

2. the public or private waste collection systems dened by local legislation must be used. In addition, the equipment can be returned to the distributor at the end of its working life when buying new equipment;

3. the equipment may contain hazardous substances: the improper use or incorrect disposal of such may have negative eects on human health and on the environment;

4. the symbol (crossed-out wheeled bin) shown on the product or on the packaging and on the instruction sheet indicates that the equipment has been introduced onto the market after 13 August 2005 and that it must be disposed of separately;

5. in the event of illegal disposal of electrical and electronic waste, the penalties are specied by local waste disposal legislation.

Warranty on the materials: 2 years (from the date of production, excluding consumables).

Approval: the quality and safety of CAREL INDUSTRIES products are guaranteed by the ISO 9001 certied design and production system.

IMPORTANT: Separate as much as possible the probe and digital input cables from the cables to inductive loads and power cables to avoid possible electromagnetic disturbance. Never run power cables (including the electrical panel cables) and signal cables in the same conduits

ENG

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

Contents

1. INTRODUCTION 7

1.1 Models .................................................................................................................7

1.2 Main functions and features ...................................................................7

2. INSTALLATION 9

2.1 DIN rail assembly and dimensions ......................................................9

2.2 Description of the terminals ...................................................................9

2.3 Connection diagram - superheat control ......................................9

2.4 Installation .......................................................................................................10

2.5 Valve operation in parallel and complementary mode......10

2.6 Shared pressure probe ............................................................................11

2.7 Connecting the USB-tLAN converter .............................................11

2.8 Connecting the module EVBAT00400 ...........................................12

2.9 Connecting the USB/RS485 converter ..........................................12

2.10 Upload, Download and Reset parameters (display) .............12

2.11 Display electrical connections (display) .......................................12

2.12 General connection diagram ..............................................................13

3. USER INTERFACE 14

3.1 Assembling the display board (accessory) ......................................14

3.2 Display and keypad ...................................................................................14

3.3 Switching between drivers (display) ..............................................15

3.4 Display mode (display) ............................................................................15

3.5 Programming mode (display)............................................................15

4. COMMISSIONING 16

4.1 Commissioning ............................................................................................16

4.2 Setting the pLAN network address .................................................16

4.3 Guided commissioning procedure (display) .............................17

4.4 Checks after commissioning ...............................................................19

4.5 Other functions............................................................................................19

5. CONTROL 20

5.1 Main control ...................................................................................................20

5.2 Superheat control ......................................................................................20

5.3 Adaptive control and autotuning ....................................................22

5.4 Control with Emerson Climate Digital Scroll ™ compressor . 23

5.5 Special control ..............................................................................................23

5.6 Programmable control ............................................................................26

5.7 Control with refrigerant level sensor ..............................................28

6. FUNCTIONS 29

6.1 Power supply mode ..................................................................................29

6.2 Battery charge delay .................................................................................29

6.3 Network connection ................................................................................29

6.4 Inputs and outputs ....................................................................................29

6.5 Control status ...............................................................................................31

6.6 Special control status ...............................................................................32

7. PROTECTORS 34

7.1 Protectors ........................................................................................................34

8. TABLE OF PARAMETERS 36

8.1 Table of parameters, driver A ...............................................................36

8.2 Table of parameters, driver B ...............................................................42

8.3 Unit of measure ...........................................................................................47

8.4 Variables accessible via serial connection – driver A ............48

8.5 Variables accessible via serial

connection – driver B .............................................................................................49

8.6 Variables used based on the type of control .............................50

9. ALARMS 51

9.1 Alarms ................................................................................................................51

9.2 Alarm relay conguration ......................................................................52

9.3 Probe alarms ..................................................................................................53

9.4 Control alarms ..............................................................................................53

9.5 EEV motor alarm ..........................................................................................54

9.6 LAN error alarm ............................................................................................54

10. TROUBLESHOOTING 55

11. TECHNICAL SPECIFICATIONS 57

12. APPENDIX 1: VPM VISUAL PA R AMETER MA

NAGER 58

12.1 Installation .....................................................................................................58

12.2 Programming (VPM) .................................................................................58

12.3 Copying the setup ....................................................................................59

12.4 Setting the default parameters ..........................................................59

12.5 Updating the controller and display rmware .........................59

13. APPENDIX 2: EVD EVOLUTION SINGLE 60

13.1 Enable single mode on twin ...............................................................60

13.2 User interface – LED card ......................................................................60

13.3 Connection diagram - superheat control ...................................60

13.4 Parameters enabled/disabled for control ....................................60

13.5 Programming with the display ..........................................................61

13.6 Auxiliary refrigerant ...................................................................................61

13.7 S3 e S4 inputs ................................................................................................61

13.8 Main control – additional functions ...............................................61

13.9 Auxiliary control .........................................................................................62

13.10 Variables used based on the type of control ...........................65

ENG

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

1. INTRODUCTION

EVD evolution twin is a controller featuring two drivers for double pole stepper motors that independently manages two electronic expansion valves. It is designed for DIN rail assembly and is tted with plug-in screw terminals. Each driver controls refrigerant superheat and optimises the eciency of the refrigerant circuit, guaranteeing maximum exibility, being compatible with various types of refrigerants and valves, in applications with chillers, air-conditioners and refrigerators, the latter including subcritical and transcritical CO

systems. It features low superheat (LowSH), high evaporation pressure (MOP), and low evaporation pressure (LOP) protection, and can manage, as an alternative to superheat control, special functions such as the hot gas bypass, evaporator pressure regulation (EPR) and control of the valve downstream of the gas cooler in transcritical CO

circuits. The controller can drive an electronic expansion valve in a refrigerant circuit with Digital Scroll compressor, if integrated with a specic CAREL controller via LAN. In addition, it features adaptive control that can evaluate the eectiveness of superheat control and if necessary activate one or more tuning procedures. As regards network connectivity, the controller can be connected to either of the following:

• a pCO programmable controller to manage the controller via pLAN, tLAN

and RS485/Modbus®;

• a PlantVisorPRO supervisor via RS485/Modbus®. In this case, On/O control

is performed via digital input 1 for driver A and via digital input 2 for driver B, if suitably congured. As well as regulation start/stop, digital inputs 1 and 2 can be congured for the following:

- valve regulation optimization after defrost;

- valve forced open (at 100%);

- regulation backup;

- regulation security.

The last two possibilities refer to the behaviour of the driver when there is no communication over the pLAN or tLAN, RS485/Modbus® network (see chap.

6). Another possibility involves operation as a simple positioner with 4 to 20 mA or 0 to 10 Vdc analogue input signal for driver A (inputs S1 and S2 respectively) and with 4 to 20 mA signal for driver B (input S3). EVD evolution twin comes with a LED board to indicate the operating status, or a graphic display (accessory) that can be used to perform installation, following a guided commissioning procedure involving setting just 4 parameters for each driver: refrigerant, valve, pressure sensor, type of main control (chiller, showcase, etc.). The procedure can also be used to check that the sensor and valve motor wiring is correct. Once installation is complete, the display can be removed, as it is not necessary for the operation of the controller, or alternatively kept in place to display the signicant system variables, any alarms and when necessary set the control parameters. The controller can also be setup using a computer via the service serial port. In this case, the VPM program (Visual Parameter Manager) needs to be installed, downloadable from http://ksa. carel.com, and the USB-tLAN converter EVDCNV00E0 connected. Only on RS485/Modbus® models can installation be managed as described above by computer, using the serial port (see paragraph 2.9) in place of the service serial port. The “universal” models can drive all types of valves, while the “CAREL” models only drive CAREL valves.

1.1 Models

Code Description

EVD0000T00 EVD evolution twin universal (tLAN) EVD0000T01 EVD evolution twin universal (tLAN) pack of 10 pcs. (*) EVD0000T10 EVD evolution twin universal (pLAN) EVD0000T11 EVD evolution twin universal (pLAN) pack of 10 pcs. (*) EVD0000T20 EVD evolution twin universal (RS485/Modbus®) EVD0000T21 EVD evolution twin universal (RS485/Modbus®) pack of 10

pcs. (*) EVD0000T30 EVD evolution twin for Carel valves (tLAN) EVD0000T31 EVD evolution twin for Carel valves (tLAN) pack of 10 pcs. (*) EVD0000T40 EVD evolution twin for Carel valves (pLAN) EVD0000T41 EVD evolution twin for Carel valves (pLAN) pack of 10 pcs. (*) EVD0000T50 EVD evolution twin for Carel valves (RS485/Modbus®) EVD0000T51 EVD evolution twin for Carel valves (RS485/Modbus®) pack

of 10 pcs. (*) EVDCON0021 EVD Evolution, connector kit (10pcs) for multi-pack(*)

Tab. 1.a

(*) The codes with multiple packages are sold without connectors, available separately in code EVDCON0021.

1.2 Main functions and features

In summary:

• electrical connections by plug-in screw terminals;

• serial card incorporated in the controller, based on the model (tLAN, pLAN,

RS485/Modbus®);

• compatibility with various types of valves (“universal” models only) and

refrigerants;

• activation/deactivation of control via digital input 1 for driver A and digital

input 2 for driver B, if suitably congured, or remote control via LAN, from pCO programmable controller;

• superheat control with protection functions for low superheat LowSH,

MOP, LOP;

• adaptive superheat control;

• function to optimise superheat control for air-conditioning units tted

with Emerson Climate Technologies Digital Scroll compressor. In this case, EVD Evolution twin must be connected to a CAREL pCO series controllers running an application program that can manage units with Digital Scroll compressors. This function is only available on the controllers for CAREL valves;

• conguration and programming by display (accessory), by computer

using the VPM program or by PlantVisor/PlantVisorPro supervisor and pCO programmable controller;

• commissioning simplied by display with guided procedure for setting the

parameters and checking the electrical connections;

• multi-language graphic display, with “help” function on various parameters;

• management of dierent units of measure (metric/imperial);

• parameters protected by password, accessible at a service (installer) and

manufacturer level;

• copy the conguration parameters from one EVD evolution twin controller

to another using the removable display;

• ratiometric or electronic 4 to 20 mA pressure transducer, the latter can be

shared between up to 5 drivers (maximum 2 EVD evolution twins + 1 EVD Evolution), useful for multiplexed applications;

• 4 to 20 mA or 0 to 10 Vdc input to use the controller as a positioner

controlled by an external signal;

• management of power failures with valve closing (only for controllers with

24 Vac power supply connected to EVD0000UC0 accessory);

• advanced alarm management.

For software versions higher than 4.0, the following new functions have been introduced:

• 24 Vac or 24 Vdc power supply, in the latter case without valve closing in

the event of power failures;

• pre-position time settable by parameter;

• use of digital to start/stop control when there is no communication with

the pCO programmable controller.

ENG

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

USB/RS485 converter (code CVSTDUMOR0)

The converter is used to connect the conguration computer and the EVD evolution twin controllers, for RS485/Modbus ® models only.

Fig. 1.c

Ultracap module (P/N EVD0000UC0)

The module, mounted on DIN rail, guarantees temporary power to the driver in the event of power failures, for enough time to immediately close the connected electronic valves (one or two). It avoids the need to install a solenoid valve. The module is made using Ultracap storage capacitors, which ensure reliability in terms of much longer component life than a module made with lead batteries. In just 4 minutes the module is ready to power two Carel valves again (or 5 minutes for pairs or other brand valves).

Fig. 1.d

Valve cable E2VCABS*00 (IP67)

Shielded cable with built-in connector for connection to the valve motor. The connector code E2VCON0000 (IP65) can also be purchased on its own, to be wired.

Fig. 1.e

Float level sensor (P/N LSR0013000)

The level sensor measures the quantity of refrigerant in the heat exchanger. This is used when controlling the valve based on the liquid level in the ooded evaporator or condenser. Available with threaded or anged connector.

Fig. 1.f

Starting from software revision 5.0 and higher, new functions have been introduced:

• management of new refrigerants;

• valve position in standby settable by parameter;

• operation as EVD Evolution with single driver: the driver controls one

expansion valve only (valve A), however it acquires new functions available using probes S3 and S4:

1. electronic valve control in a refrigerant circuit with BLDC compressor,

controlled by CAREL Power+ speed driver (with inverter);

2. superheat control with two temperature probes;

3. auxiliary control functions:

- backup probes S3 and S4;

- subcooling measurement;

- high condensing temperature protection (HiTcond);

- modulating thermostat;

- subcooling measurement;

- reverse high condensing temperature protection;

- possibility to manage CO

(R744) cascade systems, setting the

refrigerant for the primary and secondary circuit.

New functions have been introduced with software revision 5.4 and higher:

• programmable control, both superheat and special, and programmable

positioner: these functions exploit CAREL’s technology and know-how in terms of control logic;

• custom refrigerant selection;

• control with level sensor for ooded evaporator;

• control with level sensor for ooded condenser.

From the software revision following the 7.2-7.3 new features have been introduced, including:

• battery charge delay;

• external signal 0 ... 5 V (for programmable positioner).

Series of accessories for EVD evolution twin

Display (code EVDIS00**0)

Easily applicable and removable at any time from the front panel of the controller, during normal operation displays all the signicant variables for system A and B, the status of the relay outputs and recognises the activation of the protection functions and alarms. During commissioning, it guides the installer in setting the parameters required to start the installations and, once completed, can copy the parameters to other EVD evolution twin controllers. The models dier in the rst settable language, the second language for all models is English. EVDIS00**0 can be used to congure and monitor all the control parameters for both drivers, accessible via password at a service (installer) and manufacturer level.

Fig. 1.a

USB/tLAN converter (code EVDCNV00E0)

The USB-tLAN converter is connected, once the LED board cover has been removed, to the service serial port underneath. Fitted with cables and connectors, it can connect EVD evolution twin directly to a computer, which, using the VPM program, can congure and program the controller. VPM can also be used to update the controller and display rmware. See the appendix.

Fig. 1.b

ENG

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

2. INSTALLATION

2.1 DIN rail assembly and dimensions

EVD evolution twin is supplied with screen-printed connectors to simplify wiring.

VBA

EXV connectionPower Supply Relay

NO 1

COM 1

4231

GND

V REFS1S2S3S4

DI1

DI2

Analog – Digital Input Network

GND Tx/Rx

EVD evolution

110

twin

Fig. 2.a

2.2 Description of the terminals

VBA

EXV connection A

Power Supply

Relay A

NO A1

COM A

4231

GND

V REFS1S2S3S4

DI1

DI2

Analog – Digital Input Network

GND

Tx/Rx

EVD evolution

EXV connection B

Relay B

NO B

COM B

4231

twin

Fig. 2.b

Terminal Description

G,G0 Power supply VBAT Emergency power supply

Functional earth

1,3,2,4: ExV connection A

Stepper motor power supply driver A

COM A, NO A Alarm relay driver A 1,3,2,4: ExV connection B

Stepper motor power supply driver B

COM B, NO B Alarm relay driver B GND Signal ground VREF Power supply to active probes S1 Probe 1 (pressure) or 4 to 20mA external signal S2 Probe 2 (temperature) or 0 to 10 V external signal S3 Probe 3 (pressure) or 4 to 20mA external signal S4 Probe 4 (temperature) DI1 Digital input 1 DI2 Digital input 2

Terminal for tLAN, pLan, RS485/ModBus® connection Terminal for tLAN, pLan, RS485/ModBus® connection Terminal for pLan, RS485/ModBus® connection

aa service serial port (remove the cover for access) b serial port

Tab. 2.a

2.3 Connection diagram - superheat control

VBAT

COMA

NOA

1324

NET

Tx/RxGND

DI1

GND

DI2

VREF

2 AT

24 Vac

230 Vac

35 VA

shield

EVD4

EVD4 service USB adapter

EEV driver

EVDCNV00E0

Analog - Digital Input Network

OPEN A

CLOSE A

OPEN B

CLOSE B

COMB

NOB

1324

shield

TRADRFE240

4 1 2 3

14715

CAREL EXV VALVE B

CAREL E

VALVE A

EVD evolution

twin

Fig. 2.c

Key:

1 green 2 yellow 3brown 4 white 5 personal computer for conguration 6 USB/tLAN converter 7 ratiometric pressure transducer–evaporation pressure driver A 8 NTC – suction temperature driver A 9 ratiometric pressure transducer–evaporation pressure driver B 10 NTC – suction temperature driver B 11 digital input 1 congured to enable control driver A 12 digital input 2 congured to enable control driver B 13 voltage-free contact driver A (up to 230 V) 14 solenoid valve A 15 alarm signal A 16 voltage-free contact driver B (up to 230 V) 17 solenoid valve B 18 alarm signal B

Note:

• connect the valve cable shield to the electrical panel earth;

• the use of driver A for superheat control requires the use of the evaporation

pressure probe S1 and the suction temperature probe S2, which will be tted after the evaporator, and digital input 1 to enable control. As an alternative to digital input 1, control can be enabled via remote signal (tLAN, pLAN, RS485/ModBus®). For the positioning of the probes relating to other applications, see the chapter on “Control”;

• the use of driver B for superheat control requires the use of the evaporation

pressure probe S3 and the suction temperature probe S4, which will be tted after the evaporator, and digital input 2 to enable control. As an alternative to digital input 2, control can be enabled via remote signal (tLAN, pLAN, RS485/ModBus®). For the positioning of the probes relating to other applications, see the chapter on “Control”;

• inputs S1, S2, S3 & S4 are programmable and the connection to the

terminals depends on the setting of the parameters. See the chapters on “Commissioning” and “Functions”;

ENG

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

• pressure probes S1 & S2 in the diagram are ratiometric. See the general

connection diagram for the other electronic probes, 4 to 20 mA or combined;

• the pressure probes S1 and S3 must be of the same type.

2.4 Installation

For installation proceed as follows, with reference to the wiring diagrams:

1. connect the probes: the probes can be installed a maximum distance of

10 metres away from the driver, or a maximum of 30 metres as long as shielded cables with a minimum cross-section of 1 mm are used;

2. connect any digital inputs, maximum length 30 m;

3. connect the power cable to the valve motors: use 4-wire shielded cable

AWG 22 Lmax=10 m or AWG 14 Lmax=50m; failure to connect the valve motors after connecting the controller will generate the “EEV motor error” alarm: see paragraph 9.5;

4. carefully evaluate the maximum capacity of the relay outputs specied in

the chapter “Technical specications”;

5. if necessary, use a class 2 safety transformer with suitable short-circuit

and overload protection. For the power ratings of the transformer see the general connection diagram and the technical specications;

6. the connection cables must have a minimum cross-section of 0.5 mm

;

7. power up the controller: for 24 Vdc power supply the controller will close

the valves;

Important: for 24 Vdc power supply, set “Power supply mode”

parameter=1 to start control. See par. 6.1

Drivers in a serial network

Case 1: multiple controllers connected in a network powered by the same

transformer. Typical application for a series of controllers inside the same electrical panel

VBAT

COMA

NOA

132

2 AT 2 AT

2 AT

230 Vac

24 Vac

pCO

NOA

VBAT

132

COMA

NOA

VBAT

132

COMA

Fig. 2.d

Case 2:

multiple controllers connected in a network powered by dierent transformers (G0 not connected to earth). Typical application for a series of controllers in dierent electrical panels.

2 AT

230 Vac

24 Vac

2 AT

230 Vac

24 Vac

2 AT

230 Vac

24 Vac

pCO

NOA

VBAT

132

COMA

NOA

VBAT

132

COMA

NOA

VBAT

132

COMA

Fig. 2.e

Case 3:

multiple controllers connected in a network powered by dierent transformers with just one earth point. Typical application for a series of controllers in dierent electrical panels.

2 AT

230 Vac

24 Vac

2 AT

230 Vac

24 Vac

2 AT

230 Vac

24 Vac

pCO

NOA

VBAT

132

COMA

NOA

VBAT

132

COMA

NOA

VBAT

132

COMA

Fig. 2.f

Important: earthing G0 and G on a driver connected to a serial

network will cause permanent damage to the driver.

NO !

2 AT

230 Vac

24 Vac

2 AT

230 Vac

24 Vac

pCO

NOA

VBAT

COMA

NOA

VBAT

132

COMA

Fig. 2.g

Installation environment

Important: avoid installing the controller in environments with the

following characteristics:

• relative humidity greater than the 90% or condensing;

• strong vibrations or knocks;

• exposure to continuous water sprays;

• exposure to aggressive and polluting atmospheres (e.g.: sulphur and

ammonia fumes, saline mist, smoke) to avoid corrosion and/or oxidation;

• strong magnetic and/or radio frequency interference (avoid installing the

appliances near transmitting antennae);

• exposure of the controller to direct sunlight and to the elements in general.

Important: When connecting the controller, the following warnings

must be observed:

• if the controller is not used as specied in this user manual, the protection

indicated is not guaranteed;

• incorrect connection to the power supply may seriously damage the

controller;

• use cable ends suitable for the corresponding terminals. Loosen each

screw and insert the cable ends, then tighten the screws and lightly tug the cables to check correct tightness;

• separate as much as possible (at least 3 cm) the probe and digital

input cables from the power cables to the loads so as to avoid possible electromagnetic disturbance. Never lay power cables and probe cables in the same conduits (including those in the electrical panels;

• install the shielded valve motor cables in the probe conduits: use shielded

valve motor cables to avoid electromagnetic disturbance to the probe cables;

• avoid installing the probe cables in the immediate vicinity of power devices

(contactors, circuit breakers, etc.). Reduce the path of the probe cables as much as possible and avoid enclosing power devices;

• avoid powering the controller directly from the main power supply in the

panel if this supplies dierent devices, such as contactors, solenoid valves, etc., which will require a separate transformer.

• * EVD EVO is a control to be incorporated in the end equipment, do not

use for ush mount

• * DIN VDE 0100: Protective separation between SELV circuit and other

circuits must be guaranteed. The requirements according to DIN VDE 0100 must be fullled. To prevent infringement of the protective separation (between SELV circuit to other circuits) an additional xing has to be provided near to the terminals. This additional xing shall clamp the insulation and not the conductor”.

2.5 Valve operation in parallel and complementary mode

EVD evolution twin can control two CAREL valves connected together (see paragraph 4.2), in parallel mode, with identical behaviour, or in complementary mode, whereby if one valve opens, the other closes by the same percentage. To achieve such behaviour, simply set the “valve” parameter (“Two EXV connected together”) and connect the valve motor power supply wires to the same connector. In the example shown below, for operation of valve B_2 with valve B_1 in complementary mode simply swap the connection of wires 1 and 3.

ENG

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

2 CAREL valves connected

in parallel mode

2 CAREL valves connected in

complementary mode

1324

2 3

CAREL E

VALVE A_2

CAREL E

VALVE A_1

1324

2 3

CAREL E

VALVE B_2

CAREL E

VALVE B_1

Fig. 2.h

Important: in the case of installations with four valves, the EVD0000UC0

module cannot guarantee all four will close in the event of power failures.

Note: operation in parallel and complementary mode can only be used for CAREL valves, within the limits shown in the table below, where OK means that the valve can be used with all refrigerants at the rated operating pressure.

Model of CAREL valve

E2V E3V E4V E5V E6V E7V Two EXV connected together

OK E3V45, MOPD=35bar

E3V55, MOPD=26bar E3V65, MOPD=20bar

E4V85, MOPD=22bar E4V95, MOPD=15bar

NO NO NO

Tab. 2.b

Nota: MOPD = Maximum Operating-Pressure Dierential

2.6 Shared pressure probe

Only 4 to 20 mA pressure probes (not ratiometric) can be shared. The probe can be shared by a maximum of 5 drivers. For multiplexed systems where twin1, twin2 and twin 3 controllers share the same pressure probe, choose the normal option for driver A on the twin 1 controller and the “remote” option for the other drivers. Driver B on the twin3 controller must use another pressure probe, P2.

Example

twin1 twin2 twin3

Probe S1 (driver A)

-0.5 to 7 barg (P1) remote, -0.5 to 7 barg remote,

-0.5 to 7 barg Probe S3 (driver B)

remote, -0.5 to 7 barg remote, -0.5 to 7 barg -0.5 to 7 barg (P2)

Tab. 2.c

Tx/RxGND

DI1

GND

DI2

VREF

TWIN 1

TWIN 2

TWIN 3

Tx/RxGND

DI1

GND

DI2

VREF

Tx/RxGND

DI1

GND

DI2

VREF

Fig. 2.i

Key:

P1 shared pressure probe P2 pressure probe

2.7 Connecting the USB-tLAN converter

Procedure:

• remove the LED board cover by pressing on the fastening points;

• plug the adapter into the service serial port;

• connect the adapter to the converter and then this in turn to the computer

• power up the controller

press

OPEN

EVD

evolution

Fig. 2.j

VBAT

COMA

NOA

1324

NET

GND

DI1

GND

DI2

VREF

EVD4

EVD4 service USB adapter

EEV driver

EVDCNV00E0

Analog - Digital Input Network

OPEN A

CLOSE A

OPEN B

CLOSE B

COMB

NOB

1324

EVD evolution TWIN

Tx/Rx

Fig. 2.k

Key:

1 service serial port 2 adapter 3 USB/tLAN converter 4 personal computer

Note: when using the service serial port connection, the VPM program can be used to congure the controller and update the controller and display rmware, downloadable from http://ksa.carel.com. See the appendix.

ENG

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

2.8 Connecting the module EVBAT00400

The EVBAT00400 module can close the valve in the event of power failures. Digital input 1/2 can be congured to detect the “Discharged battery” alarm.

VBAT

DI1

GND

DI2

Battery module

GND

BAT ERR

EVD

VBAT

EVBAT00500

35 VA

EVBAT00400

4 AT

24 Vac

230 Vac

2 AT

TRADRFE240

EVD evolution TWIN

Fig. 2.l

Note: set the “Battery charge delay” parameter, depending on the

application. See the chapter “Functions”.

2.9 Connecting the USB/RS485 converter

Only on EVD evolution twin RS485/Modbus® models can the conguration computer be connected using the USB/RS485 converter and the serial port, according to the following diagram:

VBAT

COMA

NOA

1324

NET

Tx/RxGND

DI1

GND

DI2

VREF

shield

Analog - Digital Input Network

OPEN A

CLOSE A

OPEN B

CLOSE B

COMB

NOB

1324

EVD evolution TWIN

Fig. 2.m

Key:

1 personal computer for conguration 2 USB/RS485 converter

Note:

• the serial port can be used for conguration with the VPM program and for

updating the controller rmware, downloadable from http://ksa.carel.com;

• to save time, up to 8 controllers EVD evolution twin can be connected to

the computer, updating the rmware at the same time (each controller must have a dierent network address).

2.10 Upload, Download and Reset parameters (display)

Procedure:

1. press the Help and ENTER buttons together for 5 seconds;

2. a multiple choice menu will be displayed, use UP/DOWN to select the

required procedure;

3. conrm by pressing ENTER;

4. the display will prompt for conrmation, press ENTER;

5. at the end a message will be shown to notify the operation if the

operation was successful.

• UPLOAD: the display saves all the values of the parameters on the source

controller;

• DOWNLOAD: the display copies all the values of the parameters to the

target controller;

• RESET: all the parameters on the controller are restored to the default

values.

• See the table of parameters in chapter 8.

JEAD69

9DLCAD69 G:H:I

Fig. 2.n

Important:

• the procedure must be carried out with controller/controllers powered;

• DO NOT remove the display from the controller during the UPLOAD,

DOWNLOAD, RESET procedure;

• the parameters cannot be downloaded if the source controller and the

target controller have incompatible rmware;

• the parameters cannot be copied from driver A to driver B.

2.11 Display electrical connections (display)

To display the probe and valve electrical connections for drivers A and B, enter display mode. See paragraph 3.4

ENG

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

2.12 General connection diagram

VBAT

COMA

NOA

1324

NET

Tx/RxGND

DI1

GND

DI2

VREF

2 AT

24 Vac

230 Vac

35 VA

shield

with batterywithout battery

G G0

VBAT

COMx

NOx

1 3

Sporlan SEI / SEH / SER

DANFOSS

ETS / CCMT

EVD4

EVD4 service USB adapter

EEV driver

Tx/Rx

GND

pCO

GNDGND

RS485

Modbus®

pCO

1 20 21

EVDCNV00E0

CVSTDUM0R0

pCO

Analog - Digital Input Net work

OPEN A

CLOSE A

OPEN B

CLOSE B

COMB

NOB

1324

VBAT

EVD

VBAT

35 VA

ULTRACAP

24 Vac

230 Vac

2 AT

EVD evolution TWIN

shield

TRADRFE240

4 1

2 3

CAREL EXV VALVE B

CAREL E

VALVE A

18 19

ALCO EX5/6 EX7/8

Tx/Rx

GND

DI1

GND

DI2

VREF

EVD0000T0*: tLAN version EVD0000T3*: tLAN version EVD0000T1*: pLAN version EVD0000T4*: pLAN version EVD0000T2*: RS485 version EVD0000T5*: RS485 version

Tx/Rx

GND

DI1

GND

DI2

VREF

Tx/Rx

GND

DI1

GND

DI2

VREF

Tx/Rx

GND

DI1

GND

DI2

VREF

Tx/Rx

GND GND

DI1

GND

DI2

VREF

Tx/Rx

DI1

GND

DI2

VREF

Fig. 2.o

Key:

1 green 21 black 2 yellow 22 blue 3 brown 23 computer for conguration/supervision 4 white A Connection to EVD0000UC0 5 computer for conguration B Connection to ratiometric pressure transducer (SPKT00**R0) 6 USB/tLAN converter C Connection to electronic pressure probe (SPK**0000) or piezoresistive

pressure transducer (SPKT00*C00)

7 adapter 8 ratiometric pressure transducer driver A D Connection as positioner (4 to 20 mA input)

9 NTC probe driver A E Connection as positioner (0 to 10 Vdc input) 10 ratiometric pressure transducer driver B F Connection to combined pressure/temperature probe (SPKP00**T0) 11 NTC probe driver B L Connection to Float level sensor (cod. LSR00*3000) 12 digital input 1 congured to enable driver A control

The maximum length of the connection cable to the EVD0000UC0 module is 5 m.

13 digital input 2 congured to enable driver B control 14 voltage-free contact (up to 230 Vac) driver B

The connection cable to the valve motor must be 4-wire shielded, AWG 22 Lmax= 10 m or AWG14 Lmax= 50 m.

15 solenoid valve driver B 16 alarm signal driver B

17 voltage-free contact (up to 230 Vac) driver A 18 solenoid valve driver A 19 alarm signal driver A 20 red

ENG

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

3. USER INTERFACE

The user interface consists of 8 LEDs that display the operating status, as shown in the table:

VBAT

EXV connectionPower Suppl

Rela

NO 1

COM 1

4231

GND

V REFS1S2S3S4

DI1

DI2

Analog – Digital Input Network

GND Tx/Rx

EVD evolution

twin

Fig. 3.a

Key:

LED On O Flashing

NET Connection active No

connection

Communication error

OPEN A/B Opening valve A/B - Driver A/B disabled (*) CLOSE A/B Closing valve A/B - Driver A/B disabled (*) OPEN B/ CLOSE B

- - EVD Evolution TWIN operating as single driver

Active alarm driver A/B - -

Controller powered Controller o Wrong power supply

(see chap. on Alarms)

Tab. 3.a

(*) Awaiting completion of the initial conguration

3.1 Assembling the display board (accessory)

The display board, once installed, is used to perform all the conguration and programming operations on the two drivers. It displays the operating status, the signicant values for the type of control that the drivers are performing (e.g. superheat control), the alarms, the status of the digital inputs and the relay outputs. Finally, it can save the conguration parameters for one controller and transfer them to a second controller (see the procedure for uploading and downloading the parameters). For installation:

• remove the cover, pressing on the fastening points;

• t the display board, as shown;

• the display will come on, and if the controller is being commissioned, the

guided conguration procedure will start.

press

Fig. 3.b

Important: the controller is not activated if the conguration procedure has not been completed. The front panel now holds the display and the keypad, made up of 6 buttons, that, pressed alone or in combination, are used to perform all the conguration and programming operations on the controller.

3.2 Display and keypad

The graphic display shows two variables for each driver (A, B), the control status of the driver, activation of the protectors, any alarms and the status of the relay output.

Surriscaldam.

4.9 K

Apertura valvola

44 %

ON MOP ALARM

-- Rele

A/B

Fig. 3.c

Key:

1 variable 1 on the display (driver A/B) 2 variable 2 on the display (driver A/B) 3 relay status (driver A/B) 4 alarm (press “HELP”) 5 protector activated 6 control status 7 current display: driver A/driver B 8 adaptive control in progress

Messages on the display

Control status Active protection

ON Operation LowSH Low superheat OFF Standby LOP Low evaporation

temperature

POS Positioning MOP High evaporation

temperature

WAIT Wait HiTcond High condensing

temperature CLOSE Closing INIT Valve motor error recognition

procedure (*)

TUN Tuning in progress

Tab. 3.b

(*) The valve motor error recognition procedure can be disabled. See paragraph 9.5. (**) Only if EVD Evolution TWIN is operating as a single driver or programmable superheat control is enabled.

Keypad

Button Function

Prg • opens the screen for entering the password to access

programming mode.

• if in alarm status, displays the alarm queue;

• in the “Manufacturer” level, when scrolling the parameters,

shows the explanation screens (Help);

• pressed together with ENTER, switches the display from one

driver to the other

Esc

• exits the Programming (Service/Manufacturer) and Display

modes;

• after setting a parameter, exits without saving the changes.

UP/DOWN

• navigates the screens on the display;

• increases/decreases the value.

ENTER

• switches from display to parameter programming mode;

• conrms the value and returns to the list of parameters;

• pressed together with HELP, switches the display from one

driver to the other.

Tab. 3.c

Note: :the variables displayed as standard can be selected by conguring the parameters “Variable 1 on display” and “Variable 2 on display” for each driver. See the list of parameters.

ENG

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

3.3 Switching between drivers (display)

Procedure: press the Help and Enter buttons together. Switching when programming the parameters displays the parameters for driver A and driver B on the same screen.

CONFIGURATION PROBE S1 Ratiom., -1/9.3 barg MAIN CONTROL display cabinet/ cold room

CONFIGURATION PROBE S1 RaTiom., -1/9.3 barg MAIN CONTROL BACK PRESSURE EPR

Fig. 3.d

Important: the probe S1 parameter is common to both drivers, while the

main control parameter must be set for each driver. See the table of parameters.

3.4 Display mode (display)

Display mode is used to display the useful variables showing the operation of the system. The variables displayed depend on the type of control selected.

1. Press Esc one or more times to switch to the standard display;

2. Select driver A or B to display the corresponding variables (see paragraph

3.3);

3. press UP/DOWN: the display shows a graph of the superheat, the

percentage of valve opening, the evaporation pressure and temperature and the suction temperature variables;

4. press UP/DOWN: the variables are shown on the display followed by the

screens with the probe and valve motor electrical connections;

5. press Esc to exit display mode.

For the complete list of variables used according to the type of control see paragraph “Variables used based on the type of control”.

A/B

SH=4.9K

6.4°C

3.8barg

1.5°C

211stp

69%

Fig. 3.e

3.5 Programming mode (display)

The parameters can be modied using the front keypad. Access diers according to the user level: Service (Installer) and Manufacturer parameters.

Modifying the Service parameters

The Service parameters, as well as the parameters for commissioning the controller, also include those for the conguration of the inputs, the relay output, the superheat set point or the type of control in general, and the protection thresholds. See the table of parameters. Procedure:

1. press Esc one or more times to switch to the standard display and select

driver A or B to set the corresponding parameters (see paragraph 3.3);

2. press Prg: the display shows a screen with the PASSWORD request;

3. press ENTER and enter the password for the Service level: 22, starting

from the right-most gure and conrming each gure with ENTER;

4. if the value entered is correct, the rst modiable parameter is displayed,

network address;

5. press UP/DOWN to select the parameter to be set;

6. press ENTER to move to the value of the parameter;

7. press UP/DOWN to modify the value;

8. press ENTER to save the new value of the parameter;

9. repeat steps 5, 6, 7, 8 to modify the other parameters;

10. press Esc to exit the procedure for modifying the Service parameters.

E6HHLDG9

%%%&

Fig. 3.f

Note:

• if when setting a parameter the value entered is out-of-range, this is not

accepted and the parameter soon after returns to the previous value;

• if no button is pressed, after 5 min the display automatically returns to the

standard mode.

• to set a negative value use ENTER to move to the left-most digit and press

UP/DOWN.

Modifying the Manufacturer parameters

The Manufacturer level is used to congure all the controller parameters, and consequently, in addition to the Service parameters, the parameters relating to alarm management, the probes and the conguration of the valve. See the table of parameters. Procedure:

1. press Esc one or more times to switch to the standard display;

2. Select driver A or B to set the corresponding parameters (see paragraph

3.3);

3. press Prg : the display shows a screen with the PASSWORD request;

4. press ENTER and enter the password for the Manufacturer level:

, starting from the right-most gure and conrming each gure with

ENTER;

5. if the value entered is correct, the list of parameter categories is shown:

- Conguration

- Probes

- Control

- Special

- Alarm conguration

- Valve

6. press the UP/DOWN buttons to select the category and ENTER to access

the rst parameter in the category;

7. press UP/DOWN to select the parameter to be set and ENTER to move to

the value of the parameter;

8. press UP/DOWN to modify the value;

9. press ENTER to save the new value of the parameter;

10. repeat steps 7, 8, 9 to modify the other parameters;

11. press Esc to exit the procedure for modifying the Manufacturer parameters

CONFIGURAZIONE A/B

SONDE REGOLAZIONE SPECIALI CONFIG.ALLARMI VALVOLA

Fig. 3.g

Note:

• all the controller parameters can be modied by entering the Manufacturer

level;

• if when setting a parameter the value entered is out-of-range, this is not

accepted and the parameter soon after returns to the previous value;

• if no button is pressed, after 5 min the display automatically returns to the

standard mode.

ENG

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

4. COMMISSIONING

Important: if the refrigerant is not available among the refrigerant

parameter options, contact CAREL service to:

1. conrm that the system: pCO controller + CAREL electronic expansion

valve is compatible with the desired refrigerant (custom);

2. identify the values that dene the custom refrigerant: “Dew a…f high/

low” and “Bubble a…f high/low”. See the parameter table.

4.1 Commissioning

Once the electrical connections have been completed (see the chapter on installation) and the power supply has been connected, the operations required for commissioning the controller depend on the type of interface used, however essentially involve setting just 4 parameters: refrigerant, valve, type of pressure probe (S1 for driver A and S3 for driver B) and type of main control. The network address for EVD evolution twin is single. Types of interfaces:

• DISPLAY: after having correctly congured the setup parameters,

conrmation will be requested. Only after conrmation will the controller be enabled for operation, the main screen will be shown on the display and control will be able to commence when requested by the pCO controller via LAN or when digital input DI1 closes for driver A and DI2 for driver B. See paragraph 4.2;

• VPM: to enable control of the drivers via VPM, set “Enable EVD

control” to 1; this is included in the safety parameters, in the special parameters menu, under the corresponding access level. However, the setup parameters should rst be set in the related menu. The drivers will then be enabled for operation and control will be able to commence when requested by the pCO controller via LAN or when digital input DI1/DI2 closes. If due to error or for any other reason “Enable EVD control” should be set to 0 (zero), the controller will immediately stop control and will remain in standby until re-enabled, with the valve stopped in the last position;

• SUPERVISOR: to simplify the commissioning of a considerable number of

controllers using the supervisor, the setup operation on the display can be limited to simply setting the network address. The display will then be able to be removed and the conguration procedure postponed to a later stage using the supervisor or, if necessary, reconnecting the display. To enable control of the controller via supervisor, set “Enable EVD control”; this is included in the safety parameters, in the special parameters menu, under the corresponding access level. However, the setup parameters should rst be set in the related menu. The controller will then be enabled for operation and control will be able to commence when requested by the pCO controller via pLAN or when digital input DI1 closes for driver A and DI2 for driver B. As highlighted on the supervisor, inside of the yellow information eld relating to the “Enable EVD control” parameter, if due to error or for any other reason “Enable EVD control” should be set to 0 (zero), the controller will immediately stop control and will remain in standby until re-enabled, with the valve stopped in the last position;

• pCO PROGRAMMABLE CONTROLLER: the rst operation to be

performed, if necessary, is to set the network address using the display.

Important: for the driver with pLAN serial port, see the

guidelines described in the following paragraph for setting the address.

If a pLAN, tLAN or RS485/Modbus® controller is used, connected to a pCO family controller, the setup parameters will not need to be set and conrmed. In fact, the application running on the pCO will manage the correct values based on the unit controlled. Consequently, simply set the pLAN, tLAN or RS485/Modbus® address for the controller as required by the application on the pCO, and after a few seconds communication will commence between the two instruments and the controller automatically be enabled for control. The main screen will shown on the display, which can then be removed, and control will be commence when requested by the pCO controller or digital input DI1 for driver A and DI2 for driver B. (see paragraph 6.3). If there is no communication between the pCO and the controller (see the paragraph “LAN error alarm”), this will be able to continue control based on the status of the digital inputs.

4.2 Setting the pLAN network address

The pLAN addresses of the devices in the network must be assigned according to the following rule:

1. the EVD Evolution driver addresses must be assigned in increasing order

from left to right, starting with the controllers (A),

2. then the drivers (B) and nally

3. the terminals (C).

VBAT

EXV connectionPower Supply Relay

NO 1

COM 1

4231

GND

V REFS1S2S3S4

DI1

DI2

Analog – Digital Input Network

GNDTx/Rx

ADDR = 9

VBAT

EXV connectionPower Supply Relay

NO 1

COM 1

4231

GND

V REFS1S2S3S4

DI1

DI2

Analog – Digital Input Network

GNDTx/Rx

ADDR=10

ADDR = 32

U1U2U3

+Vterm

GND

+5 VREF

CANL

CANH

GND

ADDR = 1

pCO

pGD pGD

U1U2U3

+Vterm

GND

+5 VREF

CANL

CANH

GND

ADDR = 2

ADDR = 31

VBAT

EXV connectionPower Supply Relay

NO 1

COM 1

4231

GND

V REFS1S2S3S4

DI1

DI2

Analog – Digital Input Network

GNDTx/Rx

ADDR=11

VBAT

EXV connectionPower Supply Relay

NO 1

COM 1

4231

GND

V REFS1S2S3S4

DI1

DI2

Analog – Digital Input Network

GNDTx/Rx

ADDR=12

EVD EVD

pCO

Fig. 4.a

Important: if the addresses are not assigned in this way, as for example shown in the following gure, malfunctions will occur if one of the pCO controllers is oine.

VBAT

EXV connectionPower Supply Relay

NO 1

COM 1

4231

GND

V REFS1S2S3S4

DI1

DI2

Analog – Digital Input Network

GNDTx/Rx

ADDR = 9

VBAT

EXV connectionPower Supply Relay

NO 1

COM 1

4231

GND

V REFS1S2S3S4

DI1

DI2

Analog – Digital Input Network

GNDTx/Rx

ADDR=17

ADDR = 32

U1U2U3

+Vterm

GND

+5 VREF

CANL

CANH

GND

ADDR = 1

pCO

pGD pGD

U1U2U3

+Vterm

GND

+5 VREF

CANL

CANH

GND

ADDR = 2

ADDR = 31

VBAT

EXV connectionPower Supply Relay

NO 1

COM 1

4231

GND

V REFS1S2S3S4

DI1

DI2

Analog – Digital Input Network

GNDTx/Rx

ADDR=10

VBAT

EXV connectionPower Supply Relay

NO 1

COM 1

4231

GND

V REFS1S2S3S4

DI1

DI2

Analog – Digital Input Network

GNDTx/Rx

ADDR=18

NO!

EVD EVD

pCO

Fig. 4.b

ENG

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

4.3 Guided commissioning procedure (display)

After having tted the display:

Configuration 1/5 A

Network address

198

Configuration 1/5 A Network address

198

1. the rst parameter is displayed:

network address;

2. press Enter to move to the value

of the parameter

3. press UP/DOWN to modify the

value

Configuration 1/5 A Network address

Configuration 2/5 A

REFRIGERANT

R404A Valve Carel ExV

4. press Enter to conrm the value 5. press UP/DOWN to move to the

next parameter, refrigerant for driver A, indicated by the letter at the top right;

6. repeat steps 2, 3, 4, 5 to modify the values of the parameters for driver A:

refrigerant, valve, pressure probe S1, main control;

TxRx

GND

DI1

GND

DI2

VREF

white black green

TEMP S2

PRESS S1

VBAT

COMA

NOA

yellow white

brown

green

7. check that the probe electrical

connections are correct for driver A;

8. check that the electrical

connections are correct for valve A; then set the same parameters for driver B (see step 6);

9. set the values of the parameters for driver B: refrigerant, valve B, pressure

probe S3, main control;

TxRx

GND

DI1

GND

DI2

VREF

white black green

TEMP S4

PRESS S3

COMB

NOB

yellow white

brown

green

10. check that the probe electrical connections are correct for driver B;

11. check that the electrical connections are correct for valve B;

Configuration End configuration?

YES NO

12. if the conguration is correct exit

the procedure, otherwise choose NO and return to step 2.

At the end of the conguration procedure the controller activates the valve motor error recognition procedure, displaying “INIT” on the display. See paragraph 9.5. To simplify commissioning and avoid possible malfunctions, the controller will not start until the following have been congured for each driver:

4. network address (common parameter);

5. refrigerant;

6. valve;

7. pressure probe;

8. type of main control, that is, the type of unit the superheat control is

applied to.

Note:

• to exit the guided commissioning procedure press the DOWN button

repeatedly and nally conrm that conguration has been completed. The guided procedure CANNOT be ended by pressing Esc;

• if the conguration procedure ends with a conguration error, access

Service parameter programming mode and modify the value of the parameter in question;

• if the valve and/or the pressure probe used are not available in the list, select

any model and end the procedure. Then the controller will be enabled for control, and it will be possible to enter Manufacturer programming mode and set the corresponding parameters manually. Below are the parameters for driver A and driver B to be set during the commissioning procedure.

These parameters have the same description for both driver A and driver B, the user can recognise which parameter is being set by the letter A/B shown at the top right of the display.

Important: for 24 Vdc power supply, at the end of the guided commissioning procedure, to start control set “Power supply mode” parameter=1, otherwise the valves remain in the closed position. See paragraph 6.1.

Network address

The network address assigns to the controller an address for the serial connection to a supervisory system via RS485, and to a pCO controller via pLAN, tLAN, RS485/Modbus®. This parameter is common to both drivers A and B.

Parameter/description Def. Min. Max. UOM

CONFIGURATION Network address 198 1 207 -

Tab. 4.a

For network connection of the RS485/Modbus® models the communication speed also needs to be set, in bits per second, using the parameter “Network settings”. See paragraph 6.2.

Refrigerant

The type of refrigerant is essential for calculating the superheat. In addition, it is used to calculate the evaporation and condensing temperature based on the reading of the pressure probe.

Parameter/description Def.

CONFIGURATION Refrigerant 0 = user dener

1= R22 2= R134a 3= R404A 4= R407C 5= R410A 6= R507A 7= R290 8= R600 9= R600a 10= R717 11= R744 12= R728 13= R1270 14= R417A 15= R422D 16= R413A 17= R422A 18= R423A 19= R407A 20= R427A 21= R245FA 22= R407F

23=R32 24=HTR01 25= HTR02

26=R23 27 = R1234yf 28 = R1234ze 29 = R455A 30 = R170 31 = R442A 32 = R447A 33 = R448A 34 = R449A 35 = R450A 36 = R452A 37 = R508B 38 = R452B 39 = R513A 40 = R454B 41 = R458A

R404A

Tab. 4.b

Note:

• for CO

cascade systems, at the end of the commissioning procedure also

set the auxiliary refrigerant. See the following paragraph Appendix 2;

• if the refrigerant is not among those available for the “Refrigerant”

parameter:

1. set any refrigerant (e.g. leave the default, R404A);

2. select the model of valve, the pressure probe S1, the type of main

control and end the commissioning procedure;

3. enter programming mode and set the type of refrigerant: custom, and

the parameters “Dew a…f high” and “Bubble a…f low” that dene the refrigerant;

4. start control, for example by closing the digital input contact to enable

operation.

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“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

Valve

Setting the type of valve automatically denes all the control parameters based on the manufacturer’s data for each model. In Manufacturer programming mode, the control parameters can then be fully customised if the valve used is not in the standard list. In this case, the controller will detect the modication and indicate the type of valve as “Customised”.

Parameter/description Def.

CONFIGURATION Valve: 0= user dened; 1= CAREL ExV; 2= Alco EX4; 3=Alco EX5; 4=Alco EX6; 5=Alco EX7; 6=Alco EX8 330 Hz recommended CAREL; 7=Alco EX8 500 Hz specic Alco; 8=Sporlan SEI 0.5-11; 9=Sporlan SER 1.5-20; 10=Sporlan SEI 30; 11=Sporlan SEI 50; 12=Sporlan SEH 100; 13=Sporlan SEH 175; 14=Danfoss ETS 12.5-25B; 15=Danfoss ETS 50B; 16=Danfoss ETS 100B; 17=Danfoss ETS 250; 18=Danfoss ETS 400; 19=Two EXV CAREL connected together; 20=Sporlan SER(I)G,J,K; 21= Danfoss CCM 10-20-30; 22= Danfoss CCM 40; 23=Danfoss CCMT 2-4-8; 24 = Disabled

CAREL E

Tab. 4.c

Note: select Valve = disabled if Main control = I/O expansion for pCO to prevent the EEV motor error from being displayed. I/O expansion for pCO control can be selected at the end of the commissioning procedure, by entering programming mode.

Important:

• two CAREL EXV valves connected together must be selected if two

CAREL EXV valves are connected to the same terminal, to have parallel or complementary operation;

• as described, control is only possible with CAREL EXV valves;

• NOT all CAREL valves can be connected: see paragraph 2.5.

Pressure/refrigerant level probe S1 & S3

Setting the type of pressure probe S1 for driver A and S3 for driver B denes the range of measurement and the alarm limits based on the manufacturer’s data for each model, usually indicated on the rating plate on the probe. Select “CAREL liquid level” and connect the CAREL oat level sensor to manage the following functions:

- evaporator liquid level control with CAREL sensor;

- condenser liquid level control with CAREL sensor.

For example, connecting two CAREL liquid level probes, one to S1 and one to S3, allows independent control of two refrigerant liquid levels.

See the chapter on “Control”.

Parameter/description Def.

CONFIGURATION Probe S1, S3 Ratiom.:

-1 to 9.3 barg

Ratiometric (OUT= 0 to 5 V) Electronic (OUT= 4 to 20 mA) 1= -1 to 4.2 barg 8= -0.5 to 7 barg 2=-0.4…9.3 barg 9= 0 to 10 barg 3= -1 to 9.3 barg 10= 0 to 18.2 barg 4= 0 to 17.3 barg 11= 0 to 25 barg 5= 0.85 to 34.2 barg 12= 0 to 30 barg 6= 0 to 34.5 barg 13= 0 to 44.8 barg 7= 0 to 45 barg 14= remote, -0.5 to 7 barg

15= remote, 0 to 10 barg 16= remote, 0 to 18.2 barg 17= remote, 0 to 25 barg 18= remote, 0 to 30 barg 19= remote, 0 to 44.8 barg

20= External signal (4 to 20 mA) 21= -1 to 12.8 barg 22= 0 to 20.7 barg 23= 1.86 to 43.0 barg 24 = CAREL liquid level 25 = 0...60,0 barg 26 = 0...90,0 barg 27 = external signal (0 to 5 V)(*)

Tab. 4.d

(*) for programmable positioner. See chapter “Control”.

Important: if two pressure probes S1 and S3 are installed, these must be the same type. A ratiometric probe and an electronic probe cannot be used together.

Note: in the case of multiplexed systems where the same pressure probe is shared between the twin1 and twin2 controllers, choose the normal option for driver A and the “remote” option for the remaining drivers. Example: to use the same pressure probe P1 for driver A and B: 4 to 20 mA,

-0.5 to 7 barg For driver A on the twin 1 controller select: 4 to 20 mA, -0.5 to 7 barg. For driver B on the twin 1 controller and for driver A and B on the twin 2 controller select: remote 4 to 20 mA, -0.5 to 7 barg. The connection diagram is shown in paragraph 2.6

Note:

• the range of measurement by default is always in bar gauge (barg). In

the manufacturer menu, the parameters corresponding to the range of measurement and the alarms can be customised if the probe used is not in the standard list. If modifying the range of measurement, the controller will detect the modication and indicate the type of probe S1 or S3 as “Customised”;

• the software on the controller takes into consideration the unit of measure.

If a range of measurement is selected and then the unit of measure is changed (from bars to psi), the controller automatically updates the limits of the range of measurement and the alarm limits. By default, the main control probes S2 and S4 are set as “CAREL NTC”. Other types of probes can be selected in the service menu;

• unlike the pressure probes, the temperature probes do not have any

modiable parameters relating to the range of measurement, and consequently only the models indicated in the list can be used (see the chapter on “Functions” and the list of parameters). In any case, in manufacturer programming mode, the limits for the probe alarm signal can be customised.

Main control

Setting the main control denes the operating mode for each driver.

Parameter/description Def.

CONFIGURATION

Main control

Superheat control

1= multiplexed showcase/cold room multiplexed

showcase/ cold room

2= showcase/cold room with compressor on board

3= “perturbed” showcase/cold room 4= showcase/cold room with sub-critical CO

5= R404A condenser for sub-critical CO

6= air-conditioner/chiller with plate heat exchanger 7= air-conditioner/chiller with tube bundle heat exchanger 8= air-conditioner/chiller with nned coil heat exchanger 9= air-conditioner/chiller with variable cooling capacity 10= “perturbed” air-conditioner/chiller

Special control

11= EPR back pressure 12= hot gas bypass by pressure 13= hot gas bypass by temperature 14= transcritical CO

gas cooler 15= analogue positioner (4 to 20 mA) 16= analogue positioner (0 to 10 V) 17= air-conditioner/chiller or showcase/cold room with adaptive control 18= air-conditioner/chiller with Digital Scroll compressor (*) 19=AC/chiller with BLDC scroll compressor (CANNOT BE SELECTED) 20=superheat regulation with 2 temperature probes (CANNOT BE SELECTED) 21=I/O expander for pCO 22= Programmable SH regulation 23= Programmable special regulation 24= Programmable positioner 25= Evaporator liquid level regulation with CAREL sensor 26= Condenser liquid level regulation with CAREL sensor (*) only for CAREL valves controls

Tab. 4.e

ENG

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

The superheat set point and all the parameters corresponding to PID control, the operation of the protectors and the meaning and use of probes S1/S3 and/or S2/S4 will be automatically set to the values recommended by CAREL based on the selected application. During this initial conguration phase, only superheat control mode from 1 to 10 can be set, which dier based on the application (chiller, refrigerated cabinet, etc.). In the event of errors in the initial conguration, these parameters can later be accessed and modied inside the service or manufacturer menu. If the controller default parameters are restored (RESET procedure, see the chapter on Installation), when next started the display will again show the guided commissioning procedure.

4.4 Checks after commissioning

After commissioning:

• check that the valves complete a full closing cycle to perform alignment;

• set, if necessary, in Service or Manufacturer programming mode, the

superheat set point (otherwise keep the value recommended by CAREL based on the application) and the protection thresholds (LOP, MOP, etc.). See the chapter on Protectors.

4.5 Other functions

By entering Service programming mode, other types of main control can be selected (transcritical CO

, hot gas bypass, etc.), as well as so-called special control functions, and suitable values set for the control set point and the LowSH, LOP and MOP protection thresholds (see the chapter on “Protectors”), which depend on the specic characteristics of the unit controlled. By entering Manufacturer programming mode, nally, the operation of the controller can be completely customised, setting the function of each parameter. If the parameters corresponding to PID control are modied, the controller will detect the modication and indicate the main control as “Customised.

ENG

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

5. CONTROL

Superheat control

The parameter that the control of the electronic valve is based on is the superheat temperature, which eectively tells whether or not there is liquid at the end of the evaporator. EVD Evolution twin can independently manage superheat control on two refrigerant circuits. The superheat temperature is calculated as the dierence between: superheated gas temperature (measured by a temperature probe located at the end of the evaporator) and the saturated evaporation temperature (calculated based on the reading of a pressure transducer located at the end of the evaporator and using the Tsat(P) conversion curve for each refrigerant).

Superheat = Superheated gas temperature(*) – Satur. evaporation temperature (*) suction

If the superheat temperature is high it means that the evaporation process is completed well before the end of the evaporator, and therefore ow-rate of refrigerant through the valve is insucient. This causes a reduction in cooling eciency due to the failure to exploit part of the evaporator. The valve must therefore be opened further. Vice-versa, if the superheat temperature is low it means that the evaporation process has not concluded at the end of the evaporator and a certain quantity of liquid will still be present at the inlet to the compressor. The valve must therefore be closed further. The operating range of the superheat temperature is limited at the lower end: if the owrate through the valve is excessive the superheat measured will be near 0 K. This indicates the presence of liquid, even if the percentage of this relative to the gas cannot be quantied. There is therefore un undetermined risk to the compressor that must be avoided. Moreover, a high superheat temperature as mentioned corresponds to an insucient ow-rate of refrigerant. The superheat temperature must therefore always be greater than 0 K and have a minimum stable value allowed by the valve-unit system. A low superheat temperature in fact corresponds to a situation of probable instability due to the turbulent evaporation process approaching the measurement point of the probes. The expansion valve must therefore be controlled with extreme precision and a reaction capacity around the superheat set point, which will almost always vary from 3 to 14 K. Set point values outside of this range are quite infrequent and relate to special applications.

Example of superheat control on two independent circuits A and B.

EVD evolution

twin

CP1

EEVA

CP2

EEVB

Fig. 5.a

5.1 Main control

EVD evolution twin features two types of control, which can be set independently for driver A and B. Main control denes the operating mode of the driver. The rst 10 settings refer to superheat control, the others are socalled “special” settings and are pressure or temperature settings or depend on a control signal from an external controller. The last special functions (18, 19, 20) also relate to superheat control, but they can be selectable if EVD Evolution TWIN is working as single driver (see Appendix 2). Programmable control exploits CAREL’s technology and know-how in terms of control logic. Finally, it is possible to control liquid level in applications with ooded evaporator/condenser.

Parameter/Description Def.

CONFIGURATION Main control multiplexed

showcase/ cold room

Superheat control

1= multiplexed showcase/cold room 2= showcase/cold room with compressor on board 3= “perturbed” showcase/cold room 4= showcase/cold room with sub-critical CO

5= R404A condenser for sub-critical CO

Special control

11= EPR back pressure 12= hot gas bypass by pressure 13= hot gas bypass by temperature 14= transcritical CO

22= Programmable SH regulation 23= Programmable special regulation 24= Programmable positioner 25= Evaporator liquid level regulation with CAREL sensor 26= Condenser liquid level regulation with CAREL sensor

(*) only for CAREL valve drivers; (**) control only settable on driver A, however corresponds to the entire controller.

Tab. 5.a

Note:

• R404A condensers with subcritical CO

refer to superheat control for valves installed in cascading systems where the ow of R404A (or other refrigerant) in an exchanger acting as the CO

condenser needs to be controlled;

• “perturbed” cabinet/cold room or air-conditioner/chiller refer to units

that momentarily or permanently operate with swinging condensing or evaporation pressure;

• for the Auxiliary control setting see Appendix 2

The following paragraphs explain all the types of control that can be set on EVD evolution twin.

5.2 Superheat control

The primary purpose of the electronic valve is ensure that the ow-rate of refrigerant that ows through the nozzle corresponds to the ow-rate required by the compressor. In this way, the evaporation process will take place along the entire length of the evaporator and there will be no liquid at the outlet and consequently in the branch that runs to the compressor. As liquid is not compressible, it may cause damage to the compressor and even breakage if the quantity is considerable and the situation lasts some time.

ENG

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

Key:

CP1, CP2 compressor 1.2 C1, C2 condenser 1, 2 L1, L2 liquid receiver 1, 2 F1, F2 dewatering lter 1, 2 S1, S2 liquid indicator 1, 2 EEVA, EEVB electronic expansion valve A,B V1, V2 solenoid valve 1, 2 E1, E2 evaporator 1, 2 PA, PB pressure probe TA,TB temperature probe

For the wiring, see paragraph “General connection diagram”.

Another application involves superheat control of two evaporators in the same circuit.

EEVA

EEVB

EVD evolution

twin

PA TA

Fig. 5.b

Key:

CP compressor C condenser L liquid receiver F dewatering lter S liquid indicator EEVA, electronic expansion valve A EEVB electronic expansion valve B E1, E2 evaporator 1, 2 PA, PB pressure probe driver A, B TA,TB temperature probe driver A, B V solenoid valve

For the wiring, see paragraph “General connection diagram”.

Nota: in this example only one electronic pressure transducer with 4 to 20 mA output (SPK**0000) can be used, shared between driver A and B. Ratiometric transducers cannot be shared.

Another possibility involves connecting two equal valves (operation in parallel mode, see paragraph 2.5) to the same evaporator. This is useful in reverse-cycle chiller/heat pump applications, to improve distribution of the refrigerant in the outdoor coil.

EVD evolution

twin

CP1

EEVA_1

EEVA_2

PA TA

CP2

EEVB_1

EEVB_2

PB TB

Fig. 5.c

Key:

CP1,2 compressor 1, 2 C1,C2 condenser 1, 2 E1, E2, E3, E4 evaporator 1, 2, 3, 4 F1, F2 dewatering lter 1, 2

S1, S2

liquid indicator 1, 2 EEVA_1, EEVA_2

electronic expansion valves driver A

EEVB_1, EEVB_2

electronic expansion valves driver B

TA, TB temperature probe

L1, L2 liquid receiver 1, 2 V1, V2 solenoid valve 1, 2

For the wiring, see paragraph “General connection diagram”.

PID parameters

Superheat control, as for any other mode that can be selected with the “main control” parameter, is performed using PID control, which in its simplest form is dened by the law:

u(t)= K e(t) + 1 e(t)dt + Td

de(t)

dtT

Key:

u(t) Valve position Ti Integral time e(t) Error Td Derivative time K Proportional gain

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“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

Note that control is calculated as the sum of three separate contributions: proportional, integral and derivative.

• the proportional action opens or closes the valve proportionally to the

variation in the superheat temperature. Thus the greater the K (proportional gain) the higher the response speed of the valve. The proportional action does not consider the superheat set point, but rather only reacts to variations. Therefore if the superheat value does not vary signicantly, the valve will essentially remain stationary and the set point cannot be reached;

• the integral action is linked to time and moves the valve in proportion to

the deviation of the superheat value from the set point. The greater the deviations, the more intense the integral action; in addition, the lower the value of T (integral time), the more intense the action will be. The integration time, in summary, represents the intensity of the reaction of the valve, especially when the superheat value is not near the set point;

• the derivative action is linked to the speed of variation of the superheat value,

that is, the gradient at which the superheat changes from instant to instant. It tends to react to any sudden variations, bringing forward the corrective action, and its intensity depends on the value of the time T (derivative time).

Parameter/Description Def. Min. Max. UOM

CONTROL Superheat set point 11 LowSH: thre-

shold

180 (324) K(°F)

PID: proportional gain 15 0 800 PID: integral time 150 0 1000 s PID: derivative time 5 0 800 s

Tab. 5.b

See the “EEV system guide” +030220810 for further information on calibrating PID control.

Note: when selecting the type of main control (both superheat control and special modes), the PID control values suggested by CAREL will be automatically set for each application.

Protection function control parameters

See the chapter on “Protectors”. Note that the protection thresholds are set by the installer/manufacturer, while the times are automatically set based on the PID control values suggested by CAREL for each application.

Parameter/Description Def. Min. Max. UOM

CONTROL LowSH protection: threshold 5 -40 (-72) SH set point K (°F) LowSH protection: integral time 15 0 800 s LOP protection: threshold -50 -60 (-76) MOP: th-

reshold

°C (°F)

LOP protection: integral time 0 0 800 s MOP protection: threshold 50 LOP: thre-

shold

200 (392) °C (°F)

MOP protection: integral time 20 0 800 s

Tab. 5.c

5.3 Adaptive control and autotuning

Note: from the software revision following the 6.6-6.7, functions “Adaptive control” and “Autotuning” are no longer present. Then the setting: Main control= air-conditioner/chiller or cabinet/ cold room with adaptive control, is equivalent to: Main control = multiplexed cabinet/cold room.

EVD evolution TWIN features two functions used to automatically optimise the PID parameters for superheat control, useful in applications where there are frequent variations in thermal load:

1. automatic adaptive control: the function continuously evaluates the

eectiveness of superheat control and activates one or more optimisation procedures accordingly;

2. manual autotuning: this is activated by the user and involves just one

optimisation procedure. Both procedures give new values to the PID superheat control and protection function parameters:

- PID: proportional gain;

- PID: integral time;

- PID: derivative time;

- LowSH: low superheat integral time;

- LOP: low evaporation temperature integral time;

- MOP: high evaporation temperature integral time.

Given the highly variable dynamics of superheat control on dierent units, applications and valves, the theories on stability that adaptive control and autotuning are based on are not always denitive. As a consequence, the following procedure is suggested, in which each successive step is performed if the previous has not given a positive outcome:

1. use the parameters recommended by CAREL to control the dierent

units based on the values available for the “Main control” parameter;

2. use any parameters tested and calibrated manually based on laboratory

or eld experiences with the unit in question;

3. enable automatic adaptive control;

4. activate one or more manual autotuning procedures with the unit in

stable operating conditions if adaptive control generates the “Adaptive control ineective” alarm.

Adaptive control

After having completed the commissioning procedure, to activate adaptive control, set the parameter: “Main control”= air-conditioner/chiller or showcase/cold room with adaptive control

Parameter/Description Def.

CONFIGURATION Main control multiplexed showcase/cold room ... air-conditioner/chiller or showcase/cold room with adaptive control

Tab. 5.d

The activation status of the tuning procedure will be shown on the standard display by the letter “T”.

Superheating

4.9 K

Valve opening

44 %

-- Relais

A/B

Fig. 5.d

With adaptive control enabled, the controller constantly evaluates whether control is suciently stable and reactive; otherwise the procedure for optimising the PID parameters is activated. The activation status of the optimisation function is indicated on the standard display by the message “TUN” at the top right. The PID parameter optimisation phase involves several operations on the valve and readings of the control variables so as to calculate and validate the PID parameters. These procedures are repeated to ne-tune superheat control as much as possible, over a maximum of 12 hours.

Note:

• during the optimisation phase maintenance of the superheat set point is

not guaranteed, however the safety of the unit is ensured through activation of the protectors. If these are activated, the procedure is interrupted;

• if all the attempts performed over 12 hours are unsuccessful, the “adaptive

control ineective” alarm will be signalled and adaptive control will be disabled, resetting the default values of the PID and protection function parameters;

• to deactivate the “adaptive control ineective” alarm set the value of the

“main control” parameter to one of the rst 10 options. If required, adaptive control can be immediately re-enabled using the same parameter. If the procedure ends successfully, the resulting control parameters will be automatically saved.

Autotuning

EVD evolution TWIN also features an automatic tuning function (Autotuning) for the superheat and protector control parameters, which can be started by setting the parameter “Force manual tuning” = 1.

Parameter/Description Def. Min. Max. UOM

SPECIAL Force manual tuning 0 = no; 1= yes

00 1 -

Tab. 5.e

ENG

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

The activation status of the procedure is indicated on the standard display by the message “TUN” at the top right.

Superheating

4.9 K

Valve opening

44 %

TUN

-- Relais

A/B

Fig. 5.e

The optimisation procedure can only be performed if the driver is in control status, and lasts from 10 to 40 minutes, performing specic movements of the valve and measurements of the control variables.

Note:

• during the function maintenance of the superheat set point is not

guaranteed, however the safety of the unit is ensured through activation of the protectors. If these are activated, the procedure is interrupted;

• if, due to external disturbance or in the case of particularly unstable

systems, the procedure cannot suitably optimise the parameters, the controller will continue using the parameters saved in the memory before the procedure was started. If the procedure ends successfully, the resulting control parameters will be automatically saved.

• both the tuning procedure and adaptive control can only be enabled for

superheat control, they cannot be used for the special control functions

For CAREL internal use only, some tuning procedure control parameters can be shown on the display, supervisor, pCO and VPM; these must not be modied by non-expert users. These are:

- Tuning method

- Adaptive control status

- Last tuning result

Parameter/Description Def. Min. Max. UOM

SPECIAL Tuning method 0 0 255 -

Tab. 5.f

Tuning method is visible as a parameter in the Special category, the two other parameters are visible in display mode. See paragraph 3.4.

Note: the “Tuning method” parameter is for use by qualied CAREL

technical personnel only and must not be modied.

5.4 Control with Emerson Climate Digital Scroll ™ compressor

Important: this type of control is incompatible with adaptive control

and autotuning.

Digital Scroll compressors allow wide modulation of cooling capacity by using a solenoid valve to active a patented refrigerant bypass mechanism. This operation nonetheless causes swings in the pressure of the unit, which may be amplied by normal control of the expansion valve, leading to malfunctions. Dedicated control ensures greater stability and eciency of the entire unit by controlling the valve and limiting swings based on the instant compressor modulation status. To be able to use this mode, the LAN version driver must be connected to a Carel pCO series controller running a special application to manage units with Digital scroll compressors.

Parameter/Description Def.

CONFIGURATION Main control multiplexed showcase/cold

room ... air-conditioner/chiller with Digital Scroll compressor

Tab. 5.g

EVD evolution

twin

EEVA

EEVB

PB TB

PA TA

Tx/Rx

GND

shield

pCO

GND

Fig. 5.f

Key:

CP Compressor V Solenoid valve C Condenser S Liquid gauge L Liquid receiver EEV Electronic expansion valve F Dewatering lter E1, E2 Evaporator TA, TB Temperature probes PA, PB Pressure probes

For information on the wiring see paragraph “General connection diagram”.

5.5 Special control

EPR back pressure

This type of control can be used in applications in which a constant pressure is required in the refrigerant circuit. For example, a refrigeration system may include dierent showcases that operate at dierent temperatures (showcases for frozen foods, meat or dairy). The dierent temperatures of the circuits are achieved using pressure regulators installed in series with each circuit. The special EPR function (Evaporator Pressure Regulator) is used to set a pressure set point and the PID control parameters required to achieve this.

V1 V2

EVA

M T

V1 V2

EVB

M T

EVD evolution

twin

Fig. 5.g

Key:

V1 Solenoid valve E1, E2 Evaporator 1, 2 V2 Thermostatic expansion valve EVA,

EVB

Electronic valve A, B

PA, PBPressure probe driver A, B

For the wiring, see paragraph “General connection diagram”.

ENG

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

This involves PID control without any protectors (LowSH, LOP, MOP, see the chapter on Protectors), without any valve unblock procedure. Control is performed on the pressure probe value read by input S1 for driver A and S3 for driver B, compared to the set point: “EPR pressure set point”. Control is direct, as the pressure increases, the valve opens and vice-versa.

Parameter/Description Def. Min. Max. UOM

CONTROL EPR pressure set point 3.5 -20 (-290) 200 (2900) barg (psig) PID: proportional gain 15 0 800 PID: integral time 150 0 1000 s PID: derivative time 5 0 800 s

Tab. 5.h

Hot gas bypass by pressure

This control function can be used to control cooling capacity, which in the following example is performed by driver B. If there is no request from circuit Y, the compressor suction pressure decreases and the bypass valve opens to let a greater quantity of hot gas ow and decrease the capacity of circuit X. Driver A is used for superheat control on circuit Y.

V1 V2

M T

EVB

EVD evolution

twin

PA TA

EEVA

Fig. 5.h

Key:

CP Compressor V1 Solenoid valve C Condenser V2 Thermostatic expansion valve L Liquid receiver EEVA Electronic expansion valve A F Dewatering lter EVB Electronic valve B S Liquid indicator E Evaporator

For the wiring, see paragraph “General connection diagram”.

This involves PID control without any protectors (LowSH, LOP, MOP, see the chapter on Protectors), without any valve unblock procedure. Control is performed on the hot gas bypass pressure probe value read by input S3, compared to the set point: “Hot gas bypass pressure set point”. Control is reverse, as the pressure increases, the valve closes and vice-versa.

Parameter/Description Def. Min. Max. UOM

CONTROL Hot gas bypass pressure set point 3 -20

(290)

200 (2900)

barg

(psig) PID: proportional gain 15 0 800 PID: integral time 150 0 1000 s PID: derivative time 5 0 800 s

Tab. 5.i

Hot gas bypass by temperature

This control function can be used to control cooling capacity, which in the following example is performed by driver B. On a refrigerated cabinet, if the ambient temperature probe S4 measures an increase in the temperature, the cooling capacity must also increase, and so the EVB valve must close. In the example driver A is used for superheat control.

EVB

EVD evolution

twin

PA TA

EEVA

Fig. 5.i

Key:

CP Compressor V Solenoid valve C Condenser EEVA Electronic expansion valve A L Liquid receiver EVB Electronic valve B F Dewatering lter E Evaporator S Liquid indicator PA Pressure probe driver A TA, TB Temperature probe

For the wiring, see paragraph “General connection diagram”.

This involves PID control without any protectors (LowSH, LOP, MOP, see the chapter on Protectors), without any valve unblock procedure. Control is performed on the hot gas bypass temperature probe value read by input S4, compared to the set point: “Hot gas bypass temperature set point”. Control is reverse, as the temperature increases, the valve closes.

Parameter/Description Def. Min. Max. UOM

CONTROL Hot gas bypass temperature set point 10 -60

(-76)

200 (392)

°C (°F)

PID: proportional gain 15 0 800 PID: integral time 150 0 1000 s PID: derivative time 5 0 800 s

Tab. 5.j

Another application that exploits this control function uses the connection of two EXV valves together to simulate the eect of a three-way valve, called “reheating”. To control humidity, valve EVB_2 is opened to let the refrigerant ow into exchanger S. At the same time, the air that ows through evaporator E is cooled and the excess humidity removed, yet the temperature is below the set room temperature. It then ows through exchanger S, which heats it back to the set point (reheating). In addition, if dehumidication needs to be increased, with less cooling, valve EVA_2 must open to bypass at least some of the refrigerant to condenser C. The refrigerant that reaches the evaporator thus has less cooling capacity. Valves EVA_1 and EVA_2 are also connected together in complementary mode, controlled by the 4 to 20 mA signal on input S1, from an external regulator.

ENG

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

EVD evolution

twin

EVA_2

EVB_1

EVA_1

V1 V2

M T

EVB_2

4...20 mA regulator

Fig. 5.j

Key:

CP Compressor EVA_1, 2

EVB_1, 2

Electronic valves connected in

complementary mode C Condenser H% Relative humidity probe V1 Solenoid valve TB Temperature probe V3 Non-return valve E Evaporator S Heat exchanger

(reheating)

V2 Thermostatic expansion valve

For the wiring, see paragraph “General connection diagram”.

Transcritical CO2 gas cooler

This solution for the use of CO2 in refrigerating systems with a transcritical cycle involves using a gas cooler, that is a refrigerant/air heat exchanger resistant to high pressures, in place of the condenser. In transcritical operating conditions, for a certain gas cooler outlet temperature, there is pressure that optimises the eciency of the system:

Set= pressure set point in a gas cooler with transcritical CO

T= gas cooler outlet temperature Default value: A=3.3, B= -22.7. In the simplied diagram shown below control is performed by driver A and the simplest solution in conceptual terms is shown. The complications in the systems arise due to the high pressure and the need to optimise eciency. Driver B is used for superheat control.

EVA

IHE

PA TA

EVD evolution

twin

EEVB

PB TB

Fig. 5.k

Key:

CP Compressor EVA Electronic valve A GC Gas cooler EEVB Electronic expansion valve B E Evaporator IHE Inside heat exchanger V1 Solenoid valve

For the wiring, see paragraph “General connection diagram”.

This involves PID control without any protectors (LowSH, LOP, MOP, see the chapter on Protectors), without any valve unblock procedure. Control is performed on the gas cooler pressure probe value read by input S1, with a set point depending on the gas cooler temperature read by input S2; consequently there is not a set point parameter, but rather a formula: “CO

gas cooler pressure set point” = Coecient A * Tgas cooler (S2) + Coecient B. The set point calculated will be a variable that is visible in display mode. Control is direct, as the pressure increases, the valve opens.

Parameter/Description Def. Min. Max. UOM

SPECIAL Transcritical

: coecient A

3.3 -100 800 -

Transcritical

: coecient B

-22.7 -100 800 CONTROL PID : proportional gain 15 0 800 PID : integral time 150 0 1000 s PID : derivative time 5 0 800 s

Tab. 5.k

Analogue positioner (4 to 20 mA)

This control function is available for driver A and driver B. Valve A will be positioned linearly depending on the value of the “4 to 20 mA input for analogue valve positioning” read by input S1. Valve B will be positioned linearly depending on the value of the “4 to 20 mA input for analogue valve positioning” read by input S3. There is no PID control nor any protection (LowSH, LOP, MOP, see the chapter on Protectors), and no valve unblock procedure.

Forced closing will only occur when digital input DI1 opens for driver A or DI2 for driver B, thus switching between control status and standby. The pre-positioning and repositioning procedures are not performed. Manual positioning can be enabled when control is active or in standby.

ENG

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

EVA

4...20 mA

regulator

420

A1, A2

100%

EVD evolution

twin

EVB

4...20 mA

regulator

EVD evolution

twin

Fig. 5.l

Key:

EVA Electronic valve A A1 Valve opening A EVB Electronic valve B A2 Valve opening B

For the wiring, see paragraph “General connection diagram”.

Analogue positioner (0 to 10 Vdc)

This control function is only available for driver A. The valve will be positioned linearly depending on the value of the “0 to 10 V input for analogue valve positioning” read by input S2. There is no PID control nor any protection (LowSH, LOP, MOP), and no valve unblock procedure. The opening of digital input DI1 stops control on driver A, with corresponding forced closing of the valve and changeover to standby status.

EVA

0...10 Vdc

regulator

010

Vdc

100%

EVD evolution

twin

Fig. 5.m

Key:

EVA Electronic valve A A1 Valve opening A

For the wiring, see paragraph “General connection diagram”.

Important: the pre-positioning and repositioning procedures are not performed. Manual positioning can be enabled when control is active or in standby.

I/O expander for pCO

The EVD Evolution driver is connected to the pCO programmable controller via LAN, transferring the probe readings quickly and without ltering. The driver operates as a simple actuator, and receives the information needed to manage the valves from the pCO.

Parameter/Description Def.

CONFIGURATION Main control … I/O expander for pCO

multiplexed showcase/cold room

Tab. 5.l

EVD evolution

EEVA

Tx/Rx

GND

shield

pCO

GND

EEVB

Fig. 5.n

Key:

T Temperature probe P Pressure probe EV Electronic valve

5.6 Programmable control

With programmable control, the unused probe can be exploited to activate an auxiliary control function and maximise the controller’s potential. The following types of programmable control are available:

• Programmable superheat control (SH);

• Programmable special control;

• Programmable positioner.

Parameter/description Def Min Max U.M. CONFIGURATION

Main control … 22=

Programmable SH control ¦

23 =

Programmable special control¦

24 =

Programmable positioner

…

Multiplexed cabinet / cold room

---

SPECIAL

Programmable control conguration 0 0 32767 Programmable control input 0 0 32767 Programmable SH control options 0 0 32767 Programmable control set point 0 -800

(-11603)

800 (11603)

Tab. 5.m

The table shows the programmable control functions and the related parameter settings.

Function Parameter to be set

Direct/reverse setting Programmable control cong. Type of physical value controlled Programmable control cong. Input processing to determine measur. Programmable control cong. Correction to each individual input for integration in measurement calculation

Programmable control input

Association between physical inputs and logical outputs

Programmable control input

ENG

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

Note: the control error is the result of the dierence between the set

point and the measurement:

setpoint error

PID

measure

Direct operation: error = measurement - set point Reverse operation: error = set point - measurement

Programmable control conguration

Important: for the explanation of the HiTcond (high condensing temperature), reverse HiTcond protectors and the “Modulating thermostat” auxiliary control function, see Appendix 2.

Each digit in the “Programmable control conguration” parameter has a special meaning, depending on its position:

POSITION DESCRIPTION NOTE

Tens of thousands (DM) Control: direct/reverse Select type of control

action: direct/reverse

Thousands (M) Auxiliary control Selection any auxiliary

control or protector used for superheat

control Hundreds Do not select Tens Controlled value Select the type of

controlled physical

value (temperature,

pressure…) Units Measurement function Select the function for

calculating the value

controlled by the PID

(measurement)

Tab. 5.a

Direct/reverse control – Tens of thousands Value Description

0 PID in direct control 1 PID in reverse control 2,….9 -

AUX control - Thousands Value Description

0 None 1 HITCond protection 2 Modulating thermostat 3 HiTcond protection in reverse 4,….9 -

Hundreds – DO NOT SELECT

Controlled value - Tens Value Description

0 Temperature (°C/°F), absolute 1 Temperature (K/°F), relative 2 Pressure (bar/psi), absolute 3 Pressure (barg/psig), relative 4 Current (mA) for control 5 Voltage (V) for control 6 Voltage (V) for positioner 7 Current (mA) for positioner

8.9 -

Measurement function - Units Value Description

0 f1(S1)+ f2(S2)+ f3(S3)+ f4(S4) 1,….9 -

Programmable control input

The function assigned to each input is dened by parameter - “Programmable control input”. The parameter has 16 bits and is divided into 4 digits, as described in “Programmable control conguration”, corresponding to the 4 probes, S1, S2, S3, S4.

POSITION DESCRIPTION

Thousands Function of probe S1 Hundreds Function of probe S2 Tens Function of probe S3 Units Function of probe S4

Value Input function

00 1 + Sn 2 - Sn 3 + Tdew (Sn)(*) 4 - Tdew (Sn) 5 + Tbub (Sn)(**) 6 - Tbub (Sn)

7,8,9 (*): Tdew() = function for calculating the saturated evaporation temperature according to the type of gas. (**): Tbubble = function for calculating the condensing temperature.

Enthalpy [kJ/kg]

Pressure [MPa]

Fig. 5.o

Key:

TA Saturated evaporation temperature = Tdew

TB Superheated gas temperature = suction temperature

TB – TA Superheat

TD Condensing temperature (Tbubble)

TE Subcooled gas temperature

TD – TE Subcooling

Options/ programmable control set point

Note:

- if Control = Programmable special control, the setting of the

“Programmable control options” parameter has no aect;

- if Control = “Programmable positioner”, the settings of the “Programmable

control options” and “Programmable control set point” parameters have no aect.

The physical value measured is assigned to the individual probes S1 to S4 by the “Programmable control options” parameter. The parameter has 16 bits and is divided into 4 digits, as described in “Programmable control conguration”, corresponding to the 4 probes, S1, S2, S3, S4. The control set point si sets to the “Programmable control set point” parameter.

POSITION DESCRIPTION

Thousands Function of probe S1

Hundreds Function of probe S2

Tens Function of probe S3

Units Function of probe S4

Value Input function

0 None

1 Suction temperature

2 Evaporation pressure

3 Evaporation temperature

4 Condensing pressure

5 Condensing temperature

6 Temperature (modulating thermostat)

7,8,9 -

ENG

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

Note: if several inputs are associated with the same logical meaning, EVD Evolution considers the one associated with the input that has the highest index.

Examples

EXAMPLE 1 Sharing of the 0 to 10 V input to control two valves in parallel with the same input.

• Main control_1 = 0 to 10 V programmable positioner;

Main control_2 = 0 to 10 V programmable positioner.

• Programmable control conguration_1 = 00060; PID control function =

f(S1)+f(S2)+f(S3)+f(S4). The other settings not aect. Programmable control conguration_2 = 00060; PID control function = f(S1)+f(S2)+f(S3)+f(S4);

• Programmable control input_1 = 0100 ->Measurement =S2

Programmable control input_2 = 0100 ->Measurement =S2

• Programmable control options_1 = XXXX, no aect

Programmable control options_2 = XXXX, no aect

• Programmable control set point_1 = X.X, no aect

Programmable control set point_2 = X.X, no aect

EVD Evolution twin shares the input associated with probe 2 and moves the two valves in parallel.

EXAMPLE 2 Superheat control with hot gas bypass by temperature. Programmable control is used to add the high condensing temperature protection (HiTCond).

• Main control_1 = 22 -> Programmable SH control;

• Main control_2 = 13 -> Hot gas bypass by temperature.

• Programmable control conguration_1=01010,

1) Direct PID temperature control;

2) HiTcond control enabled;

3) Temperature (°F/psig), absolute;

4) Measurement function: f1(S1)+f2(S2)+f3(S3)+f4(S4);

• Programmable control input_1 = 4100-> Measurement =-Tdew(S1)+S2

• Programmable control options_1 = 2140

1) S1 = Evaporation pressure

2) S2 = Suction temperature

3) S3 = Condensing pressure

4) S4 = Not used

• Programmable control set point_1 = 10 K

EVB

EVD evolution

twin

EEVA

Fig. 5.p

5.7 Control with refrigerant level sensor

In the ooded shell and tube evaporator and in the ooded condenser, the refrigerant vaporises outside of the tubes, which are immersed in the liquid refrigerant. The hot uid owing through the tubes is cooled, transferring heat to the refrigerant surrounding the tubes, so that this boils, with gas exiting from the top, which is taken in by the compressor.

Parameter/description Def Min Max UOM CONFIGURATION

Probe S1 … 24 = CAREL liquid level …

Ratiometric:-1…9.3 barg

-- -

Main control … 26 = Evaporator liquid level control with CAREL sensor 27 = Condenser liquid level control with CAREL sensor

Multiplexed cabinet/ cold room

-- -

CONTROL

Liquid level set point 50 0 100 %

The action is reverse: if the liquid level measured by the oat level sensor is higher (lower) than the set point, the EEV valve closes (opens).

Setpoint = 50 %

MAX = 100 %

EEV

EVD evolution

FLOODED SHELL AND TUBE EVAPORATOR

FROM CONDENSER

TO COMPRESSOR

MIN = 0 %

Fig. 5.q

Key:

S Float level sensor EEV Electronic valve E Flooded evaporator

For the wiring, see paragraph “General connection diagram”.

With the condenser, the action is direct: if the liquid level measured by the oat level sensor is lower (higher) than the set point, the EEV valve closes (opens).

ENG

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

6. FUNCTIONS

6.1 Power supply mode

EVD evolution twin can be powered at 24 Vac or 24 Vdc. In the event of direct current power supply, after completing the commissioning procedure, to start control set “Power supply mode” parameter=1.

Parameter/Description Def. Min. Max. UOM

SPECIAL Power supply mode 0=24 Vac 1= 24 Vdc

0 01-

Tab. 6.a

Important: with direct current power supply, in the event of power failures emergency closing of the valve is not performed, even if the EVD0000UC0 module is connected.

6.2 Battery charge delay

Battery charge delay to allow battery charging. In the presence of a battery to close the valve, to avoid missing emergency closing in case of repeated and close blackouts, a regulation start delay has been introduced, congurable by the user depending on the backup system used (ultracap or lead battery). This delay, if set to a value> 0, occurs every time the driver is turned on to allow the battery to recharge.

Parameter/description Def.

ADVANCED Battery charge delay 0 min

6.3 Network connection

Important: to set the pLAN address, follow the guidelines in chap.4.

To connect an RS485/Modbus® controller to the network, as well as the network address parameter (see paragraph 4.2), using the “Network settings” parameter.

Parameter Description Def.

SPECIAL Set conguration parity Bit stop Baud rate 0 none parity 2 bit stop 4800 bps 1 none parity 2 bit stop 9600 bps 2 none parity 2 bit stop 19200 bps x 4 none parity 1 bit stop 4800 bps 5 none parity 1 bit stop 9600 bps 6 none parity 1 bit stop 19200 bps 16 even parity 2 bit stop 4800 bps 17 even parity 2 bit stop 9600 bps 18 even parity 2 bit stop 19200 bps 20 even parity 1 bit stop 4800 bps 21 even parity 1 bit stop 9600 bps 22 even parity 1 bit stop 19200 bps 24 odd parity 2 bit stop 4800 bps 25 odd parity 2 bit stop 9600 bps 26 odd parity 2 bit stop 19200 bps 28 odd parity 1 bit stop 4800 bps 29 odd parity 1 bit stop 9600 bps 30 odd parity 1 bit stop 19200 bps

Tab. 6.b

Note: To use the Carel protocol you must use the default settings:

• byte size: 8 bits;

• stop bits: 2;

• parity: none.

6.4 Inputs and outputs

Analogue inputs

The parameters in question concern the choice of the type of pressure/liquid probe S1 and S3 and the choice of the temperature probe S2 and S4, as well as the possibility to calibrate the pressure and temperature signals. As regards the choice of pressure/liquid probe S1 and S3, see the chapter on “Commissioning”.

Inputs S2, S4

The options are standard NTC probes, high temperature NTC, combined temperature and pressure probes and 0 to 10 Vdc input. For S4 the 0 to 10 Vdc input is not available. When choosing the type of probe, the minimum and maximum alarm values are automatically set. See the chapter on “Alarms”.

Type CAREL code Range

CAREL NTC (10K at 25°C) NTC0**HP00 -50T105°C

NTC0**WF00 NTC0**HF00

CAREL NTC-HT HT (50K at 25°C) NTC0**HT00 0T120°C

(150 °C for 3000 h) Combined NTC SPKP**T0 -40T120°C NTC low temperature NTC*LT* -80T60°C

Important: for combined NTC probes, also select the parameter

relating to the corresponding ratiometric pressure probe.

Parameter/description Def.

CONFIGURATION Probe S2: 1= CAREL NTC; 2= CAREL NTC-HT high T.; 3= Combined NTC SPKP**T0; 4= 0 to 10 V external signal; 5=NTC – LT CAREL low temperature

CAREL NTC

Probe S4: 1= CAREL NTC; 2= CAREL NTC-HT high T.; 3= Combined NTC SPKP**T0; 4 = ---; 5=NTC – LT CAREL low temperature

CAREL NTC

Tab. 6.c

Calibrating pressure probes S1, S3 and temperature probes S2 and S4 (oset and gain parameters)

If needing to be calibrate:

• the pressure probe, S1 and/or S3, the oset parameter can be used, which

represents a constant that is added to the signal across the entire range of measurement, and can be expressed in barg/psig. If the 4 to 20 mA signal coming from an external controller on input S1 and/or S3needs to be calibrated, both the oset and the gain parameters can be used, the latter which modies the gradient of the line in the eld from 4 to 20 mA.

• the temperature probe, S2 and/or S4, the oset parameter can be used,

which represents a constant that is added to the signal across the entire range of measurement, and can be expressed in °C/°F. If the 0 to 10 Vdc signal coming from an external controller on input S2 needs to be calibrated, both the oset and the gain parameters can be used, the latter which modies the gradient of the line in the eld from 0 to 10 Vdc.

420

010

Vdc

Fig. 6.a

Key:

A= oset, B= gain

Parameter/description Def. Min. Max. UOM

Probes S1: calibration oset 0 -60 (-870),

-60

60 (870), 60

barg (psig),

mA S1: calibration gain, 4 to 20 mA 1 -20 20 S2: calibration oset 0 -20 (-36) 20 (36) °C (°F), volt S2: calibration gain, 0 to 10 V 1 -20 20 S3: calibration oset 0 -60 (-870) 60 (870) barg (psig) S3: calibration gain, 4 to 20 mA 1 -20 20 S4: calibration oset 0 -20 (-36) 20 (36) °C (°F)

Tab. 6.d

ENG

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

Digital inputs

The functions of digital inputs 1 and 2 can be set by parameter, as shown in the table below:

Parameter/description Def. Min. Max. UOM

CONFIGURATION DI1 conguration 1= Disabled 2= Valve regulation optimization after defrost 3= Discharged battery alarm management 4= Valve forced open (at 100%) 5= Regulation start/stop 6= Regulation backup 7= Regulation security

5/6 1 7 -

CONTROL Start delay after defrost 10 0 60 min

Tab. 6.e

Valve regulation optimization after defrost: the selected digital input tells

the driver the current defrost status. Defrost active = contact closed. Access Manufacturer programming mode to set the start delay after defrost; this parameter is common to both drivers.

Discharged battery alarm management: this setting can only be selected if

the controller power supply is 24 Vac. If the selected digital input is connected to the battery charge module for EVD evolution, EVBAT00400, the controller signals discharged or faulty batteries, so as to generate an alarm message and warn the service technicians that maintenance is required.

Valve forced open: when the digital input closes, the valve opens completely

(100%), unconditionally. When the contact opens again the valve closes and moves to the position dened by the parameter “valve opening at start-up” for the pre-position time. Control can then start.

Regulation start/stop:

digital input closed: control active; digital input open: driver in standby (see the paragraph “Control status”);

Important: this setting excludes activation/deactivation of control via

the network. See the following functions.

Regulation backup: if there is a network connection and communication

fails, the driver checks the status of the digital input to determine whether control is active or in standby;

Regulation security: if there is a network connection, before control

is activated the driver must receive the control activation signal and the selected digital input must be closed. If the digital input is open, the driver

always remains in standby.

Priority of digital inputs

In certain cases the setting of digital inputs 1 and 2 may be incompatible (e.g. no regulation start/stop). The problem thus arises to determine which function each driver needs to perform.

Consequently, each type of function is assigned a priority, primary (PRIM) or secondary (SEC), as shown in the table:

DI1/DI2 conguration Type of function

1=Disabled SEC 2=Valve regulation optimization after defrost SEC 3=Discharged battery alarm management SEC 4=Valve forced open (at 100%) SEC 5=Regulation start/stop PRIM 6=Regulation backup PRIM 7=Regulation security PRIM

There are four possible cases of digital input congurations with primary or secondary functions.

Driver A Driver B

Case

Function set Function performed by

digital input

Function performed by

digital input

DI1 DI2 PRIM SEC PRIM SEC

1 PRIM PRIM DI1 - DI2 2 PRIM SEC DI1 DI2 DI1 3 SEC PRIM DI2 - DI2 DI1 4 SEC SEC Regulation

backup driver A (supervisor variable)

DI1 Regulation

backup driver B) (supervisor variable)

DI2

Note that:

• if digital inputs 1 and 2 are set to perform a PRIM function, driver A performs

the function set by digital input 1 and driver B the function set by digital input 2;

• if digital inputs 1 and 2 are set to perform a PRIM and SEC function

respectively, driver A and driver B perform the PRIM function set on digital input DI1. Driver A will also perform the SEC function set on digital input DI2;

• if digital inputs 1 and 2 are set to perform a SEC and PRIM function

respectively, driver A and driver B perform the PRIM function set on digital input DI2. Driver B will also perform the SEC function set on digital input DI1;

• if digital inputs 1 and 2 are set to perform a SEC function, driver A will

perform the SEC function set on input DI1 and driver B will perform the SEC function set on input DI2. Each driver will be set to “Regulation backup”, with the value of the digital input determined respectively by the supervisor variables:

- Regulation backup from supervisor (driver A);

- Regulation backup from supervisor (driver B).

Examples

Example 1: assuming an EVD Evolution twin controller connected to the LAN.

In this case, the start/stop control will come from the network. The two digital inputs can be congured for:

1. valve regulation optimization after defrost (SEC function);

2. regulation backup (PRIM function).

With reference to the previous table:

• in case 2, when there is no communication both driver A and driver B will

be enabled for control by digital input 1, and digital input 2 will determine when control stops to run the defrost for driver A only;

• in case 3 when there is no communication digital input 2 will activate

control for both driver A and driver B. Digital input 1 will determine when control stops to run the defrost for driver B only.

Example 2: assuming an EVD Evolution twin controller in stand-alone

operation. In this case, the start/stop control will come from the digital input. The following cases are possible:

1. start / stop driver A/B from inputs DI1/DI2 (case 1);

2. simultaneous star t / stop of both drivers A/B from input DI1 (case 2); input

DI2 can be used for discharged battery alarm management.

Relay outputs

The relay outputs can be congured as:

• alarm relay output. See the chapter on Alarms;

• solenoid valve control;

• electronic expansion valve status signal relay. The relay contact is only open

if the valve is closed (opening=0%). As soon as control starts (opening >0%, with hysteresis), the relay contact is closed

Parameter/description Def.

CONFIGURATION Relay conguration: 1= Disabled; 2= Alarm relay (open when alarm active); 3= Solenoid valve relay (open in standby); 4= Valve + alarm relay (open in standby and control alarms) 5= Reversed alarm relay (closed in case of alarm); 6= Valve status relay (open if valve is closed); 7 = Direct control; 8=Failed closing alarm relay (opened with alarm); 9=Reverse failed closing alarm relay (closed with alarm)

Alarm relay

Tab. 6.f

ENG

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

6.5 Control status

The electronic valve controller has 8 dierent types of control status, each of which may correspond to a specic phase in the operation of the refrigeration unit and a certain status of the controller-valve system. The status may be as follows:

• forced closing: initialisation of the valve position when switching the

instrument on;

• standby: no temperature control, unit OFF;

• wait: opening of the valve before starting control, also called pre-

positioning, when powering the unit and in the delay after defrosting;

• control: eective control of the electronic valve, unit ON;

• positioning: step-change in the valve position, corresponding to the start

of control when the cooling capacity of the controlled unit varies (only for LAN EVD connected to a pCO);

• stop: end of control with the closing of the valve, corresponds to the end

of temperature control of the refrigeration unit, unit OFF;

• valve motor error recognition: see paragraph 9.5;

• tuning in progress: see paragraph 5.3

Forced closing

Forced closing is performed after the controller is powered-up and corresponds to a number of closing steps equal to the parameter “Closing steps”, based on the type valve selected. This is used to realign the valve to the physical position corresponding to completely closed. The driver and the valve are then ready for control and both aligned at 0 (zero). On power-up, rst a forced closing is performed, and then the standby phase starts.

Parameter/description Def. Min. Max. UOM

VALV E EEV closing steps 500 0 9999 step

Tab. 6.g

The valve is closed in the event of power failures with 24 Vac power supply when the EVD0000UC0 module is connected. In this case, the parameter “Forced valve closing not completed”, visible only on the supervisor, is forced to 1. If when restarting forced closing of the valve was not successful:

1. the Master programmable controller checks the value of the parameter

and if this is equal to 1, decides the best strategy to implement based on the application;

2. EVD Evolution twin does not make any decision and positions the valve as

explained in the paragraph “Pre-positioning/start control”. The parameter is reset to 0 (zero) by the Master controller (e.g. pCO). EVD Evolution twin resets the parameter to 0 (zero) only if forced emergency closing is completed successfully

Standby

Standby corresponds to a situation of rest in which no signals are received to control the electronic valve. This normally occurs when:

• the refrigeration unit stops operating, either when switched o manually

(e.g. from the button, supervisor) or when reaching the control set point;

• during defrosts, except for those performed by reversing of the cycle (or

hot gas bypass). In general, it can be said that electronic valve control is in standby when the compressor stops or the control solenoid valve closes. The valve is closed or open according to the setting of “Valve open in standby”. The percentage of opening is set using “Valve position in standby”. In this phase, manual positioning can be activated.

Parameter/description Def. Min. Max. UOM

CONTROL Valve open in standby 0=disabled=valve closed; 1=enabled = valve open 25%

001-

Valve position in standby 0 = 25 % (*) 1…100% = % opening (**)

0 0 100 %

Tab. 6.h

These two parameters determine the position of the valve in standby based on the minimum and maximum number of valve steps.

Parameter/description Def. Min. Max. UOM

VALV E Minimum EEV steps 50 0 9999 step Maximum EEV steps 480 0 9999 step

Tab. 6.i

(*) The formula used is:

steps

Max_step_EEV

25%

Min_step_EEV

Apertura / Opening =

Min_step_EEV+(Max_step_EEV-Min_step_EEV )/100*25

Fig. 6.b

(**) In this case, the formula used is:

steps

99%

Apertura / Opening = P*(Max_step_EEV / 100)

Min_step_EEV

100%

Max_step_EEV

P = Posizione valvola in stand-by / Position valve in stand-by

Fig. 6.c

Note: if “Valve open in standby=1”, the positions of the valve when

setting “Valve position in standby”=0 and 25 do not coincide. Refer to the above formulae.

Prepositioning/start control

If during standby a control request is received, before starting control the valve is moved to a precise initial position. The pre-position time is the time the valve is held in a steady position based on the parameter “Valve opening at start-up”.

Parameter/description Def. Min. Max. UOM

CONTROL Pre-position time 6 0 18000 s Valve opening at start-up (evaporator/valve capacity ratio)

50 0 100 %

Tab. 6.j

The valve opening parameter should be set based on the ratio between the rated cooling capacity of the evaporator and the valve (e.g. rated evaporator cooling capacity: 3kW, rated valve cooling capacity: 10kW, valve opening = 3/10 = 33%).

If the capacity request is 100%:

Opening (%)= (Valve opening at start-up);

If the capacity request is less than 100% (capacity control):

Opening (%)= (Valve opening at start-up) x (Current unit cooling capacity), where the current unit cooling capacity is sent to the driver via pLAN by the pCO controller. If the driver is stand-alone, this is always equal to 100%.

Note:

• this procedure is used to anticipate the movement and bring the valve

signicantly closer to the operating position in the phases immediately after the unit starts;

• if there are problems with liquid return after the refrigeration unit starts or

in units that frequently switch on-o, the valve opening at start-up must be decreased. If there are problems with low pressure after the refrigeration unit starts, the valve opening must be increased.

Wait

When the calculated position has been reached, regardless of the time taken (this varies according to the type of valve and the objective position), there is a constant 5 second delay before the actual control phase starts. This is to create a reasonable interval between standby, in which the variables have no meaning, as there is no ow of refrigerant, and the eective control phase.

ENG

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

Control

The control request for each driver can be received, respectively, by the closing

of digital input 1 or 2, via the network (LAN). The solenoid or the compressor

are activated when the valve, following the pre-positioning procedure, has

reached the calculated position. The following gure represents the sequence

of events for starting control of the refrigeration unit.

Control delay after defrost

Some types of refrigerating cabinets have problems controlling the electronic

valve in the operating phase after a defrost. In this period (10 to 20 min

after defrosting), the superheat measurement may be altered by the high

temperature of the copper pipes and the air, causing excessive opening of

the electronic valve for extended periods, in which there is return of liquid to

the compressors that is not detected by the probes connected to the driver.

In addition, the accumulation of refrigerant in the evaporator in this phase

is dicult to dissipate in a short time, even after the probes have started to

correctly measure the presence of liquid (superheat value low or null).

The driver can receive information on the defrost phase in progress, via the

digital input. The “Start delay after defrost” parameter is used to set a delay

when control resumes so as to overcome this problem. During this delay,

the valve will remain in the pre-positioning point, while all the normal probe

alarm procedures, etc. are managed.

Parameter/description Def. Min. Max. UOM

CONTROL Start delay after defrost 10 0 60 min

Tab. 6.k

Important: if the superheat temperature should fall below the set

point, control resumes even if the delay has not yet elapsed.

OFF

T1 T2W

Fig. 6.d

Key:

A Control request W Wait S Standby T1 Pre-position time P Pre-positioning T2 Start delay after defrost R Control t Time

Positioning (change cooling capacity)

This control status is only valid for the pLAN controller.

If there is a change in unit cooling capacity of at least 10%, sent from the pCO

via the pLAN, the valve is positioned proportionally. In practice, this involves

repositioning starting from the current position in proportion to how much

the cooling capacity of the unit has increased or decreased in percentage

terms. When the calculated position has been reached, regardless of the time

taken (this varies according to the type of valve and the position), there is a

constant 5 second delay before the actual control phase starts.

Note: if information is not available on the variation in unit cooling

capacity, this will always be considered as operating at 100% and therefore

the procedure will never be used. In this case, the PID control must be

more reactive (see the chapter on Control) so as to react promptly to

variations in load that are not communicated to the driver.

OFF

T3 W

Fig. 6.e

Key:

A Control request T3 Repositioning time C Change capacity W Wait NP Repositioning t Time R Control

Stop/end control

The stop procedure involves closing the valve from the current position until reaching 0 steps, plus a further number of steps so as to guarantee complete closing. Following the stop phase, the valve returns to standby.

OFF

Fig. 6.f

Key:

A Control request R Control S Standby T4 Stop position time ST Stop t Time

6.6 Special control status

As well as normal control status, the driver can have 3 special types of status related to specic functions:

• manual positioning: this is used to interrupt control so as to move the

valve, setting the desired position;

• recover physical valve position: recover physical valve steps when fully

opened or closed;

• unblock valve: forced valve movement if the driver considers it to be

blocked.

ENG

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

Manual positioning

Manual positioning can be activated at any time during the standby or control phase. Manual positioning, once enabled, is used to freely set the position of the valve using the corresponding parameter.

Parameter/Description Def. Min. Max. UOM

CONTROL Enable manual valve positioning 0 0 1 Manual valve position 0 0 9999 step Stop manual positioning on network error 0 = Normal operation; 1 = Stop

001-

Tab. 6.l

Control is placed on hold, all the system and control alarms are enabled, however neither control nor the protectors can be activated. Manual positioning thus has priority over any status/protection of the driver.

When the driver is connected to the network (for example to a pCO controller), in presence of an communication-error (LAN error), manual positioning can be inhibited temporarily by the parameter and the driver recognizes the start/ stop regulation, depending on the conguration of the digital inputs.

Note:

• the manual positioning status is NOT saved when restarting after a power

failure;

• in for any reason the valve needs to be kept stationary after a power failure,

proceed as follows:

- remove the valve stator;

- in Manufacturer programming mode, under the conguration

parameters, set the PID proportional gain =0. The valve will remain stopped at the initial opening position, set by corresponding parameter.

Recover physical valve position

Parameter/Description Def. Min. Max. UOM

VALV E Synchronise valve position in opening 1 0 1 Synchronise valve position in closing 1 0 1 -

Tab. 6.m

This procedure is necessary as the stepper motor intrinsically tends to lose steps during movement. Given that the control phase may last continuously for several hours, it is probable that from a certain time on the estimated position sent by the valve controller does not correspond exactly to the physical position of the movable element. This means that when the driver reaches the estimated fully closed or fully open position, the valve may physically not be in that position. The “Synchronisation” procedure allows the driver to perform a certain number of steps in the suitable direction to realign the valve when fully opened or closed.

Note:

• realignment is in intrinsic part of the forced closing procedure and is

activated whenever the driver is stopped/started and in the standby phase;

• the possibility to enable or disable the synchronisation procedure depends

on the mechanics of the valve. When the setting the “valve” parameter, the

two synchronisation parameters are automatically dened. The default

values should not be changed.

Unblock valve

This procedure is only valid when the driver is performing superheat control. Unblock valve is an automatic safety procedure that attempts to unblock a valve that is supposedly blocked based on the control variables (superheat, valve position). The unblock procedure may or may not succeed depending on the extent of the mechanical problem with the valve. If for 10 minutes the conditions are such as to assume the valve is blocked, the procedure is run a maximum of 5 times. The symptoms of a blocked valve doe not necessarily mean a mechanical blockage. They may also represent other situations:

• mechanical blockage of the solenoid valve upstream of the electronic valve

(if installed);

• electrical damage to the solenoid valve upstream of the electronic valve;

• blockage of the lter upstream of the electronic valve (if installed);

• electrical problems with the electronic valve motor;

• electrical problems in the driver-valve connection cables;

• incorrect driver-valve electrical connection;

• electronic problems with the valve control driver;

• secondary uid evaporator fan/pump malfunction;

• insucient refrigerant in the refrigerant circuit;

• refrigerant leaks;

• lack of subcooling in the condenser;

• electrical/mechanical problems with the compressor;

• processing residues or moisture in the refrigerant circuit.

Note: the valve unblock procedure is nonetheless performed in each

of these cases, given that it does not cause mechanical or control problems. Therefore, also check these possible causes before replacing the valve.

ENG

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

7. PROTECTORS

Note: the HiTcond and reverse HiTcond protectors can be activated

if EVD Evolution twin works as a single driver (see Appendix 2) or if

programmable control is activated (see chap. on Control).

These are additional functions that are activated in specic situations that are

potentially dangerous for the unit being controlled. They feature an integral

action, that is, the action increases gradually when moving away from the

activation threshold. They may add to or overlap (disabling) normal PID

superheat control. By separating the management of these functions from PID

control, the parameters can be set separately, allowing, for example, normal

control that is less reactive yet much faster in responding when exceeding the

activation limits of one of the protectors.

7.1 Protectors

There are 3 protectors:

• LowSH, low superheat;

• LOP, low evaporation temperature;

• MOP, high evaporation temperature;

The protectors have the following main features:

• activation threshold: depending on the operating conditions of the

controlled unit, this is set in Service programming mode;

• integral time, which determines the intensity (if set to 0, the protector is

disabled): set automatically based on the type of main control;

• alarm, with activation threshold (the same as the protector) and delay (if set

to 0 disables the alarm signal).

Note: the alarm signal is independent from the eectiveness of the protector, and only signals that the corresponding threshold has been exceeded. If a protector is disabled (null integration time), the relative alarm signal is also disabled.

Each protector is aected by the proportional gain parameter (K) for the PID superheat control. The higher the value of K, the more intense the reaction of the protector will be.

Characteristics of the protectors

Protection Reaction Reset

LowSH Intense closing Immediate LOP Intense opening Immediate MOP Moderate closing Controlled

Tab. 7.a

Reaction: summary description of the type of action in controlling the valve. Reset: summary description of the type of reset following the activation

of the protector. Reset is controlled to avoid swings around the activation threshold or immediate reactivation of the protector.

LowSH (low superheat)

The protector is activated so as to prevent the return of liquid to the compressor due to excessively low superheat values.

Parameter/description Def. Min. Max. UOM

CONTROL LowSH protection: threshold 5 -40 (-72) SH set point K (°F) LowSH protection: integral time 15 0 800 s ALARM CONFIGURATION Low superheat alarm delay (LowSH) (0= alarm disabled)

300 0 18000 s

Tab. 7.b

When the superheat value falls below the threshold, the system enters low superheat status, and the intensity with which the valve is closed is increased: the more the superheat falls below the threshold, the more intensely the valve will close. The LowSH threshold, must be less than or equal to the superheat set point. The low superheat integration time indicates the intensity of the action: the lower the value, the more intense the action.

The integral time is set automatically based on the type of main control.

OFF

Low_SH

Low_SH_TH

Fig. 7.a

Key:

SH Superheat A Alarm Low_SH_TH Low_SH protection threshold D Alarm delay Low_SH Low_SH protection t Time B Automatic alarm reset

LOP (low evaporation pressure)

LOP= Low Operating Pressure The LOP protection threshold is applied as a saturated evaporation temperature value so that it can be easily compared against the technical specications supplied by the manufacturers of the compressors. The protector is activated so as to prevent too low evaporation temperatures from stopping the compressor due to the activation of the low pressure switch. The protector is very useful in units with compressors on board (especially multi-stage), where when starting or increasing capacity the evaporation temperature tends to drop suddenly. When the evaporation temperature falls below the low evaporation temperature threshold, the system enters LOP status and is the intensity with which the valve is opened is increased. The further the temperature falls below the threshold, the more intensely the valve will open. The integral time indicates the intensity of the action: the lower the value, the more intense the action.

Parameter/description Def. Min. Max. UOM

CONTROL LOP protection: threshold -50 -60

(-76)

MOP protection: threshold

°C (°F)

LOP protection: integral time 0 0 800 s ALARM CONFIGURATION Low evaporation temperature alarm delay (LOP) (0= alarm disabled)

300 0 18000 s

Tab. 7.c

The integral time is set automatically based on the type of main control.

ENG

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

Note:

• the LOP threshold must be lower then the rated evaporation temperature

of the unit, otherwise it would be activated unnecessarily, and greater than the calibration of the low pressure switch, otherwise it would be useless. As an initial approximation it can be set to a value exactly half-way between the two limits indicated;

• the protector has no purpose in multiplexed systems (showcases) where

the evaporation is kept constant and the status of the individual electronic valve does not aect the pressure value;

• the LOP alarm can be used as an alarm to highlight refrigerant leaks by

the circuit. A refrigerant leak in fact causes an abnormal lowering of the evaporation temperature that is proportional, in terms of speed and extent, to the amount of refrigerant dispersed.

OFF

LOP

LOP_TH

T_EVAP

Fig. 7.b

Key:

T_EVAP Evaporation temperature D Alarm delay LOP_TH Low evaporation temperature

protection threshold

ALARM Alarm

LOP LOP protection t Time B Automatic alarm reset

MOP (high evaporation pressure)

MOP= Maximum Operating Pressure.

The MOP protection threshold is applied as a saturated evaporation temperature value so that it can be easily compared against the technical specications supplied by the manufacturers of the compressors. The protector is activated so as to prevent too high evaporation temperatures from causing an excessive workload for the compressor, with consequent overheating of the motor and possible activation of the thermal protector. The protector is very useful in units with compressor on board if starting with a high refrigerant charge or when there are sudden variations in the load. The protector is also useful in multiplexed systems (showcases), as allows all the utilities to be enabled at the same time without causing problems of high pressure for the compressors. To reduce the evaporation temperature, the output of the refrigeration unit needs to be decreased. This can be done by controlled closing of the electronic valve, implying superheat is no longer controlled, and an increase in the superheat temperature. The protector will thus have a moderate reaction that tends to limit the increase in the evaporation temperature, keeping it below the activation threshold while trying to stop the superheat from increasing as much as possible. Normal operating conditions will not resume based on the activation of the protector, but rather on the reduction in the refrigerant charge that caused the increase in temperature. The system will therefore remain in the best operating conditions (a little below the threshold) until the load conditions change.

Parameter/description Def. Min. Max. UOM

CONTROL MOP protection: threshold 50 LOP protection:

threshold

200 (392)

°C (°F)

MOP protection: integral time 20 0 800 s ALARM CONFIGURATION High evaporation temperature alarm delay (MOP) (0= alarm disabled)

600 0 18000 s

Tab. 7.d

The integral time is set automatically based on the type of main control.

When the evaporation temperature rises above the MOP threshold, the system enters MOP status, superheat control is interrupted to allow the pressure to be controlled, and the valve closes slowly, trying to limit the evaporation temperature. As the action is integral, it depends directly on the dierence between the evaporation temperature and the activation threshold. The more the evaporation temperature increases with reference to the MOP threshold, the more intensely the valve will close. The integral time indicates the intensity of the action: the lower the value, the more intense the action.

OFF

ALARM

OFF

PID

OFF

MOP

MOP_TH - 1

MOP_TH

T_EVAP

Fig. 7.c

Key:

T_EVAP Evaporation temperature MOP_TH MOP threshold PID PID superheat control ALARM Alarm MOP MOP protection t Time D Alarm delay

Important: the MOP threshold must be greater than the rated evaporation temperature of the unit, otherwise it would be activated unnecessarily. The MOP threshold is often supplied by the manufacturer of the compressor. It is usually between 10°C and 15 °C.

If the closing of the valve also causes an excessive increase in the suction temperature (S2) above the set threshold – only set via supervisor (PlantVisor, pCO, VPM), not on the display - the valve will be stopped to prevent overheating the compressor windings, awaiting a reduction in the refrigerant charge. If the MOP protection function is disabled by setting the integral time to zero, the maximum suction temperature control is also deactivated.

Parameter/description Def. Min. Max. UOM

CONTROL MOP protection: suction temperature threshold

30 -60 (-72) 200 (392) °C(°F)

Tab. 7.e

At the end of the MOP protection function, superheat control restarts in a controlled manner to prevent the evaporation temperature from exceeding the threshold again..

ENG

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

8. TABLE OF PARAMETERS

8.1 Table of parameters, driver A

user *

Parameter/description Def. Min. Max. UOM

Type **

CAREL SVP

Modbus®

Note

CONFIGURATION

A Network address pLAN: 30

others: 198

1 207 - I 11 138 CO

A Refrigerant:

0= user dened; 1= R22 2= R134a 3= R404A 4= R407C 5= R410A 6= R507A 7= R290 8= R600 9= R600a 10= R717 11= R744 12= R728 13= R1270 14= R417A 15= R422D 16= R413A 17= R422A 18= R423A 19= R407A 20= R427A 21= R245FA 22= R407F

23=R32 24=HTR01 25= HTR02

26=R23 27 = R1234yf 28 = R1234ze 29 = R455A 30 = R170 31 = R442A 32 = R447A 33 = R448A 34 = R449A 35 = R450A 36 = R452A 37 = R508B 38 = R452B 39 = R513A 40 = R454B 41 = R458A

R404A - - - I 13 140 -

A Valve:

0= user dened 13= Sporlan SEH 175 1= CAREL E

V 14= Danfoss ETS 12.5-25B 2= Alco EX4 15= Danfoss ETS 50B 3= Alco EX5 16= Danfoss ETS 100B 4= Alco EX6 17= Danfoss ETS 250 5= Alco EX7 18= Danfoss ETS 400 6= Alco EX8 330Hz recommend CAREL

19= Two E

V CAREL connected

together 7= Alco EX8 500Hz specic Alco 20= Sporlan SER(I)G,J,K 8= Sporlan SEI 0.5-11 21= Danfoss CCM 10-20-30 9= Sporlan SER 1.5-20 22= Danfoss CCM 40 10= Sporlan SEI 30

23= Danfoss CCM T 2-4-8

11= Sporlan SEI 50

24= Disabled

12= Sporlan SEH 100

CAREL EXV - - - I 14 141

A Probe S1:

0= user dened Ratiometric (OUT=0 to 5 V) Electronic (OUT=4 - 20 mA) 1= -1 to 4.2 barg 8= -0.5 to 7 barg 2= 0.4 to 9.3 barg 9= 0 to 10 barg 3= -1 to 9.3 barg 10= 0 to 18.2 bar 4= 0 to 17.3 barg 11= 0 to 25 barg 5= 0.85 to 34.2 barg 12= 0 to 30 barg 6= 0 to 34.5 barg 13= 0 to 44.8 barg 7= 0 to 45 barg 14= remote, -0.5 to 7 barg 15= remote, 0 to 10 barg 16= remote, 0 to 18.2 barg 17= remote, 0 to 25 barg 18= remote, 0 to 30 barg 19= remote, 0 to 44.8 barg

20= 4 to 20mA external signal 21= -1 to 12.8 barg 22= 0 to 20.7 barg 23= 1.86 to 43.0 barg 24= CAREL liquid level 25 = 0...60,0 barg 26 = 0...90,0 barg 27 = external signal 0…5 V

Ratiometric:

-1 to 9.3 barg

---I16143CO

ENG

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

user *

Parameter/description Def. Min. Max. UOM

Type **

CAREL SVP

Modbus®

Note

A Main control:

0= user dened;

1= Multiplexed showcase/cold room 2= Showcase/cold room with compressor on board 3= “Perturbed” showcase/cold room 4= Showcase/cold room with sub-critical

5= R404A condenser for sub-critical CO

6= Air-conditioner/chiller with plate heat exchanger 7= Air-conditioner/chiller with tube bundle heat exchanger 8= Air-conditioner/chiller with nned coil heat exchanger 9= Air-conditioner/chiller with variable cooling capacity 10= “Perturbed” air-conditioner/chiller 11= EPR back pressure 12= Hot gas bypass by pressure 13= Hot gas bypass by temperature 14= Transcritical

CO2

gas cooler 15= Analogue positioner (4 to 20 mA) 16= Analogue positioner (0 to 10 V) 17= Air-conditioner/chiller or showcase/cold room with adaptive control 18= Air-conditioner/chiller with Digital Scroll compressor (*) 19= AC or chiller with BLDC scroll compressor (CANNOT BE SELECTED) 20= superheat regulation with 2 temperature probes (CANNOT BE SELECTED) 21= I/O expander for pCO (**)

(*) only for controls for CAREL valves (**) common parameter between driver A and driver B

Multiplexed showcase/ cold room

- - - I 15 142 -

A Probe S2:

0= user dened

1= NTC CAREL

CAREL NTC- HT high 3= combined NTC SPKP**T0

4= 0 to 10V external signal

5= NTC – LT CAREL low temperature

CAREL NTC - - - I 17 144 CO

A Auxiliary control:

0= user dened

1= Disabled 2= high condensing temperature protection on S3 probe 3= modulating thermostat on S4 probe 4= backup probes on S3 and S4 5, 6, 7 = Reserved 8= Subcooling measurement 9= Inverse high condensation temperature protection on S3 probe 10= Reserved

- - - - I 18 145 CO

A Probe S3:

0= user dened

Ratiometric (OUT=0 to 5 V) Electronic (OUT=4 - 20 mA) 1= -1 to 4.2 barg 8= -0.5 to 7 barg 2=-0.4…9.3 barg 9= 0 to 10 barg 3= -1 to 9.3 barg 10= 0 to 18.2 bar 4= 0 to 17.3 barg 11= 0 to 25 barg 5= 0.85 to 34.2 barg 12= 0 to 30 barg 6= 0 to 34.5 barg 13= 0 to 44.8 barg 7= 0 to 45 barg 14= remote, -0.5 to 7 barg 15= remote, 0 to 10 barg 16= remote, 0 to 18.2 barg 17= remote, 0 to 25 barg 18= remote, 0 to 30 barg 19= remote, 0 to 44.8 barg 20= 4 to 20mA external signal 21= -1 to 12.8 barg 22= 0 to 20.7 barg 23= 1.86 to 43.0 barg) 24= CAREL liquid level 25 = 0...60,0 barg 26 = 0...90,0 barg 27 = external signal 0…5 V

Ratiometric:

-1 to 9.3 barg

- - - I 19 146 CO

ENG

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

user *

Parameter/description Def. Min. Max. UOM

Type **

CAREL SVP

Modbus®

Note

A Relay conguration:

1= Disabled 2= Alarm relay (open when alarm active) 3= Solenoid valve relay (open in standby) 4= Valve + alarm relay (open in standby and control alarms) 5= Reversed alarm relay (closed in case of alarm) 6= Valve status relay (open if valve is closed) 7= Direct command 8= Faulty closure alarm relay (opened if alarm) 9= Reverse faulty closure alarm relay (closed if alarm)

Alarm relay - - - I 12 139 -

A Probe S4:

User dened

1= CAREL NTC 2= CAREL NTC-HT high temperature 3= Combined NTC SPKP**T0 4= --5= NTC-LT CAREL low temperature

CAREL NTC - - - I 20 147 -

A DI2 Conguration:

1= Disabled 2= Valve regulation optimization after defrost 3= Discharged battery alarm management 4= Valve forced open (at 100%) 5= Regulation start/stop 6= Regulation backup 7= Regulation security

Regulation start/stop (tLAN-RS485) / Regulation backup (pLAN)

---I10137CO

C Variable 1 on display:

1= Valve opening 2= Valve position 3= Current cooling capacity 4= Set point control 5= Superheat 6= Suction temperature 7= Evaporation temperature 8= Evaporation pressure 9= Condensing temperature 10= Condensing pressure 11= Modulating thermostat temperature(*) 12= EPR pressure 13= Hot gas bypass pressure 14= Hot gas bypass temperature 15=

gas cooler outlet temperature

16=

gas cooler outlet pressure

17=

gas cooler pressure set point 18= Probe S1 reading 19= Probe S2 reading 20= Probe S3 reading 21= Probe S4 reading 22= 4 to 20 mA input 23= 0 to 10 V input (*) CANNOT BE SELECTED

Superheat - - - I 45 172 -

C Variable 2 on display (see variable 1 on display) Valve ope-

ning

- - - I 46 173 -

C Probe S1 alarm management:

1= No action 2= Forced valve closing 3= Valve in xed position 4= Use backup probe S3 (*) (*) CANNOT BE SELECTED

Valve in xed position

---I24151CO

C Probe S2 alarm management:

1= No action 2= Forced valve closing 3= Valve in xed position 4= Use backup probe S4 (*) (*) CANNOT BE SELECTED

Valve in xed position

---I25152CO

C Probe S3 alarm management:

1= No action 2= Forced valve closing 3= Valve in xed position

No action - - - I 26 153 CO

C Probe S4 alarm management:

1= No action 2= Forced valve closing 3= Valve in xed position

No action - - - I 27 154 CO

C Unit of measure: 1= °C/K/barg; 2= °F/psig °C/K/barg - - - I 21 148 CO

ENG

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

user *

Parameter/description Def. Min. Max. UOM

Type **

CAREL SVP

Modbus®

Note

A DI1 conguration

1= Disabled 2= Valve regulation optimization after defrost 3= Discharged battery alarm management 4= Valve forced open (at 100%) 5= Regulation start/stop 6= Regulation backup 7= Regulation security

Regulation start/stop (tLAN-RS485) / Regulation backup (pLAN)

---I85212CO

C Language: Italiano; English Italiano - - - CO C

Auxiliary refrigerant

-1=

user dened; 0 = same as main regulation

23=R32 24=HTR01 25= HTR02

26=R23 27 = R1234yf 28 = R1234ze 29 = R455A 30 = R170 31 = R442A 32 = R447A 33 = R448A 34 = R449A 35 = R450A 36 = R452A 37 = R508B 38 = R452B 39 = R513A 40 = R454B 41 = R458A

R404A - - - I 96 223 CO

PROBES

C S1: calibration oset 0 -60(-870), -60 60(870), 60 barg (psig)mAA3433 CO

C S1: calibration gain, 4 to 20 mA 1 -20 20 - A 36 35 CO C Pressure S1: MINIMUM value -1 -20 (-290) Pressure S1:

MAXIMUM value

barg (psig) A 32 31 CO

C Pressure S1: MAXIMUM value 9.3 Pressure S1:

MINIMUM value

200 (2900) barg (psig) A 30 29 CO

C Pressure S1: MINIMUM alarm value -1 -20 (-290) Pressure S1:

MAXIMUM alarm value

barg (psig) A 39 38 CO

C Pressure S1: MAXIMUM alarm value 9.3 Pressure S1:

MINIMUM alarm value

200 (2900) barg (psig) A 37 36 CO

C S2: calibration oset 0 -20 (-36), -20 20 (36), 20 °C (°F), volt A 41 40 CO C S2: calibration gain, 0 to 10 V 1 -20 20 - A 43 42 CO C Temperature S2: MINIMUM alarm value -50

-85(-121)

Temperature S2: MAXIMUM alarm value

°C (°F) A 46 45 CO

C Temperature S2: MAXIMUM alarm value 105 Temperature

S2: MINIMUM alarm value

200 (392) °C (°F) A 44 43 CO

C S3: calibration oset 0 -60 (-870) 60 (870) barg (psig) A 35 34 CO C S3: calibration gain, 4 to 20 mA 1 -20 20 - A 82 81 CO C Pressure S3 : MINIMUM value -1 -20 (-290) Pressure S3:

MAXIMUM value

barg (psig) A 33 32 CO

C Pressure S3: MAXIMUM value 9.3 Pressure S3:

MINIMUM value

200 (2900) barg (psig) A 31 30 CO

C Pressure S3: MINIMUM alarm value -1 -20 (-290) Pressure S3:

MAXIMUM alarm value

barg (psig) A 40 39 CO

C Pressure S3: MAXIMUM alarm value 9.3 Pressure S3:

MINIMUM alarm value

200 (2900) barg (psig) A 38 37 CO

C S4: calibration oset 0 -20 (-36) 20 (36) °C (°F) A 42 41 CO C Temperature S4: MINIMUM alarm value -50

-85(-121)

Temperature S4: MAXIMUM alarm value

°C (°F) A 47 46 CO

C Temperature S4: MAXIMUM alarm value 105 Temperature

S4: MINIMUM alarm value

200 (392) °C (°F) A 45 44 CO

C Maximum dierence S1/S3 (pressure) 0 0 200(2900) bar(psig) A 114 113 CO C Maximum dierence S2/S4 (temperature) 0 0 180(324) °C (°F) A 115 114 CO C Alarm delay S1 0 0 240 s I 131 258 CO C Alarm delay S2 0 0 240 s I 132 259 CO C Alarm delay S3 0 0 240 s I 133 260 CO C Alarm delay S4 0 0 240 s I 134 261 CO C Enable S1 0 0 1 - D 16 15 CO C Enable S2 0 0 1 - D 17 16 CO C Enable S3 0 0 1 - D 18 17 CO C

Enable S4 0 0 1 - D 19 18 CO

CONTROL

ENG

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

user *

Parameter/description Def. Min. Max. UOM

Type **

CAREL SVP

Modbus®

Note

A Superheat set point 11 LowSH: thre-

shold

180 (324) K (°F) A 50 49 -

A Valve opening at start-up (evaporator/valve capacity ratio) 50 0 100 % I 37 164 C Valve open in standby

(0= disabled= valve closed; 1=enabled = valve open according to parameter “Valve position in stand-by”)

001-D2322-

C Valve position in stand-by

0 = 25% 1…100% = % opening

0 0 100 % I 91 218 -

C start-up delay after defrost 10 0 60 min I 40 167 A Pre-position time 6 0 18000 s I 90 217 A Hot gas bypass temperature set point 10 -85(-121) 200 (392) °C (°F) A 28 27 A Hot gas bypass pressure set point 3 -20 (-290) 200 (2900) barg (psig) A 62 61 A EPR pressure set point 3.5 -20 (-290) 200 (2900) barg (psig) A 29 28 C PID: proportional gain 15 0 800 - A 48 47 C PID: integral time 150 0 1000 s I 38 165 C PID: derivative time 5 0 800 s A 49 48 A LowSH protection: threshold 5 -40 (-72) SH set point K (°F) A 56 55 C LowSH protection: integral time 15 0 800 s A 55 54 A LOP protection: threshold -50 -85(-121) MOP protec-

tion: threshold

°C (°F) A 52 51 -

C LOP protection: integral time 0 0 800 s A 51 50 A MOP protection: threshold 50 LOP protec-

tion: threshold

200 (392) °C (°F) A 54 53 -

C MOP protection: integral time 20 0 800 s A 53 52 A Enable manual valve positioning 0 0 1 - D 24 23 A Manual valve position 0 0 9999 step I 39 166 C Discharge superheat setpoint (CANNOT BE SELECTED) 35 -40(-72) 180 (324) K (F°) A 100 99 C Discharge temperature setpoint (CANNOT BE SELECTED) 105 -85(-121) 200 (392) °C (°F) A 101 100 C Liquid level set point 50 0 100 % A 119 118 -

SPECIAL

A HiTcond: threshold - SELECT WITH PROG. CONT. 80 -85(-121) 200 (392) °C (°F) A 58 57 C HiTcond: integral time - SELECT WITH PROG. CONT. 20 0 800 s A 57 56 A Modulating thermostat: set point - SELECT WITH PROG. CONT. 0 -85(-121) 200 (392) °C (°F) A 61 60 A Modulating thermostat: dierential - SELECT WITH PROG. CONT. 0. 1 0.1 (0.2) 100 (180) °C (°F) A 60 59 C Mod. thermostat: SH set point oset - SELECT WITH PROG. CONT. 0 0 (0) 100 (180) K (°F) A 59 58 C Coecient ‘A’ for CO

control 3.3 -100 800 - A 63 62 -

Coecient ‘B’ for CO

control

-22.7 -100 800 - A 64 63 C Force manual tuning 0=no; 1= yes 0 0 1 - D 39 38 C Tuning method

0 to 100= automatic selection 101 to 141= manual selection 142 to 254= not allowed 255= PID parameters model identified

0 0 255 - I 79 206 -

C Impostazioni di rete

Parity Bit di stop Baud rate 0 no parity 2 stop bits 4800 bps 1 no parity 2 stop bits 9600 bps 2 no parity 2 stop bits 19200 bps 4 no parity 1 stop bit 4800 bps 5 no parity 1 stop bit 9600 bps 6 no parity 1 stop bit 19200 bps 16 even 2 stop bits 4800 bps 17 even 2 stop bits 9600 bps 18 even 2 stop bits 19200 bps 20 even 1 stop bit 4800 bps 21 even 1 stop bit 9600 bps 22 even 1 stop bit 19200 bps 24 odd 2 stop bits 4800 bps 25 odd 2 stop bits 9600 bps 26 odd 2 stop bits 19200 bps 28 odd 1 stop bit 4800 bps 29 odd 1 stop bit 9600 bps 30 odd 1 stop bit 19200 bps

2 0 30 - I 74 201 CO

A Power supply mode

0= 24 Vac; 1= 24 Vdc

001-D4746CO

C Enable mode single on twin (parameter disabled)

0= Twin; 1= Single

001-D5857CO

C Stop manual positioning if net error

0 = Normal operation; 1 = Stop

001-D5958CO

C Programmable regulation conguration 0 0 32767 - I 101 228 C Programmable regulation input 0 0 32767 - I 102 229 C Programmable SH regulation options 0 0 32767 - I 103 230 C Programmable regulation set point 0 -800(-1233) 800(1233) - A 112 111

ENG

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

user *

Parameter/description Def. Min. Max. UOM

Type **

CAREL SVP

Modbus®

Note

C CUSTOMIZED REFRIGERANT

Dew a high -288 -32768 32767 - I 107 234 Dew a low -15818 -32768 32767 - I 108 235 Dew b high -14829 -32768 32767 - I 109 236 Dew b low 16804 -32768 32767 - I 110 237 Dew c high -11664 -32768 32767 - I 111 238 Dew c low 16416 -32768 32767 - I 112 239 Dew d high -23322 -32768 32767 - I 113 240 Dew d low -16959 -32768 32767 - I 114 241 Dew e high -16378 -32768 32767 - I 115 242 Dew e low 15910 -32768 32767 - I 116 243 Dew f high -2927 -32768 32767 - I 117 244 Dew f low -17239 -32768 32767 - I 118 245 Bubble a high -433 -32768 32767 - I 119 246 Bubble a low -15815 -32768 32767 - I 120 247 Bubble b high -15615 -32768 32767 - I 121 248 Bubble b low 16805 -32768 32767 - I 122 249 Bubble c high 30803 -32768 32767 - I 123 250 Bubble c low 16416 -32768 32767 - I 124 251 Bubble d high -21587 -32768 32767 - I 125 252 Bubble d low -16995 -32768 32767 - I 126 253 Bubble e high -24698 -32768 32767 - I 127 254 Bubble e low 15900 -32768 32767 - I 128 255 Bubble f high 10057 -32768 32767 - I 129 256 Bubble f low -17253 -32768 32767 - I 130 257

C Faulty closure alarm status

0/1=no/yes

001-D4948

C Battery charge delay 0 0 250 min I 135 262 CO

ALARM CONFIGURATION

C Low superheat alarm delay (LowSH)

(0= alarm disabled)

300 0 18000 s I 43 170 -

C Low evaporation temperature alarm delay (LOP)

(0= alarm disabled)

300 0 18000 s I 41 168 -

C High evaporation temperature alarm delay (MOP)

(0= alarm disabled)

600 0 18000 s I 42 169 -

C High condensing temperature alarm delay (HiTcond)

SELECT WITH PROG. CONT.

600 0 18000 s I 44 171 CO

C Low suction temperature alarm threshold -50 -85 (-121) 200 (392) °C (°F) A 26 25 C Low suction temperature alarm delay

(0= alarm disabled)

300 0 18000 s I 9 136 -

VALV E

C EEV minimum steps 50 0 9999 step I 30 157 C EEV maximum steps 480 0 9999 step I 31 158 C EEV closing steps 500 0 9999 step I 36 163 C EEV rated speed 50 1 2000 step/s I 32 159 C EEV rated current 450 0 800 mA I 33 160 C EEV holding current 100 0 250 mA I 35 162 C EEV duty cycle 30 1 100 % I 34 161 C Synchronise position in opening 1 0 1 - D 20 19 C Synchronise position in closing 1 0 1 - D 21 20 -

Tab. 8.a

* User level: A= Service (installer), C= manufacturer. ** Type of variable: A= Analogue; D= Digital; I= Integer CO= parameter settable from driver A or from driver B

ENG

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

8.2 Table of parameters, driver B

user *

Parameter/description Def. Min. Max. UOM

Type **

CAREL SVP

Modbus®

Note

CONFIGURATION

A Network address pLAN: 30

altri: 198

1 207 - I 11 138 CO

A Refrigerant:

0= User dened;

23=R32 24=HTR01 25= HTR02

26=R23 27 = R1234yf 28 = R1234ze 29 = R455A 30 = R170 31 = R442A 32 = R447A 33 = R448A 34 = R449A 35 = R450A 36 = R452A 37 = R508B 38 = R452B 39 = R513A 40 = R454B 41 = R458A

R404A - - - I 55 182 -

A Valve:

0= user dened 13= Sporlan SEH 175 1= CAREL E

V 14= Danfoss ETS 12.5-25B 2= Alco EX4 15= Danfoss ETS 50B 3= Alco EX5 16= Danfoss ETS 100B 4= Alco EX6 17= Danfoss ETS 250 5= Alco EX7 18= Danfoss ETS 400 6= Alco EX8 330Hz recommend CAREL

19= Two E

V CAREL connected

together 7= Alco EX8 500Hz specic Alco 20= Sporlan SER(I)G,J,K 8= Sporlan SEI 0.5-11 21= Danfoss CCM 10-20-30 9= Sporlan SER 1.5-20 22= Danfoss CCM 40 10= Sporlan SEI 30

23= Danfoss CCM T 2-4-8

11= Sporlan SEI 50

24= Disabled

12= Sporlan SEH 100

CAREL EXV - - - I 54 181

A Probe S1:

0= User dened;

20= 4 to 20mA external signal 21= -1 to 12.8 barg 22= 0 to 20.7 barg 23= 1.86 to 43.0 barg 24= CAREL liquid level 25 = 0...60,0 barg 26 = 0...90,0 barg 27 = external signal 0…5 V

Ratiometric:

-1 to 9.3 barg

---I16143CO

ENG

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

user *

Parameter/description Def. Min. Max. UOM

Type **

CAREL SVP

Modbus®

Note

A Main control:

1= Multiplexed showcase/cold room 2= Showcase/cold room with compressor on board 3= “Perturbed” showcase/cold room 4= Showcase/cold room with

sub-critical CO

5= R404A condenser for sub-critical

(*)= control only settable on driver A, however corresponds to the entire controller

Multiplexed showcase/ cold room

- - - I 56 183 -

A Probe S2:

0= user dened

1= CAREL NTC

2= CAREL NTC-HT high temp.

3= combined NTC SPKP**T0

4= 0 to 10V external signal

5= NTC – LT CAREL low temperature

CAREL NTC - - - I 17 144 CO

A Auxiliary control:

user dened

----I18145CO

A Probe S3:

0= User dened;

Ratiometric (OUT=0 to 5 V) Electronic (OUT=4 - 20 mA) 1= -1 to 4.2 barg 8= -0.5 to 7 barg 2= 0.4 to 9.3 barg 9= 0 to 10 barg 3= -1 to 9.3 barg 10= 0 to 18.2 bar 4= 0 to 17.3 barg 11= 0 to 25 barg 5= 0.85 to 34.2 barg 12= 0 to 30 barg 6= 0 to 34.5 barg 13= 0 to 44.8 barg 7= 0 to 45 barg 14= remote, -0.5 to 7 barg 15= remote, 0 to 10 barg 16= remote, 0 to 18.2 barg 17= remote, 0 to 25 barg 18= remote, 0 to 30 barg 19= remote, 0 to 44.8 barg

20= 4 to 20mA external signal 21= -1 to 12.8 barg 22= 0 to 20.7 barg 23= 1.86 to 43.0 barg 24= CAREL liquid level 25 = 0...60,0 barg 26 = 0...90,0 barg 27 = external signal 0…5 V

Ratiometric:

-1 to 9.3 barg

---I19146CO

ENG

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

user *

Parameter/description Def. Min. Max. UOM

Type **

CAREL SVP

Modbus®

Note

A Relay conguration:

Alarm relay - - - I 57 184 -

A Probe S4:

User dened

1= CAREL NTC 2= CAREL NTC-HT high temperature 3= Combined NTC SPKP**T0 4= --5= NTC-LT CAREL low temperature

CAREL NTC - - - I 20 147 CO

A DI2 Conguration:

1= Disabled 2= Valve regulation optimization after defrost 3= Discharged battery alarm management 4= Valve forced open (at 100%) 5= Regulation start/stop 6= Regulation backup 7= Regulation security

Regulation start/stop (tLAN-RS485) / Regulation backup (pLAN)

---I10137CO

C Variable 1 on display:

gas cooler outlet temperature

16=

gas cooler outlet pressure

17=

gas cooler pressure set point 18= Probe S1 reading 19= Probe S2 reading 20= Probe S3 reading 21= Probe S4 reading 22= 4 to 20 mA input 23= 0 to 10 V input (*) CANNOT BE SELECTED

Superheat - - - I 58 185 -

C Variable 2 on display (see variable 1 on display) Valve ope-

ning

- - - I 59 186 -

C Probe S1 alarm management:

1= No action 2= Forced valve closing 3= Valve in xed position 4= Use backup probe S3 (*) (*) CANNOT BE SELECTED

Valve in xed position

- - - I 24 151 CO

C Probe S2 alarm management:

1= No action 2= Forced valve closing 3= Valve in xed position 4= Use backup probe S4 (*) (*) CANNOT BE SELECTED

Valve in xed position

---I25152CO

C Probe S3 alarm management:

1= No action 2= Forced valve closing 3= Valve in xed position

No action - - - I 26 153 CO

C Probe S4 alarm management:

1= No action 2= Forced valve closing 3= Valve in xed position

No action - - - I 27 154 CO

C Unit of measure: 1= °C/K/barg; 2= °F/psig °C/K/barg - - - I 21 148 CO

ENG

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

user *

Parameter/description Def. Min. Max. UOM

Type **

CAREL SVP

Modbus®

Note

A DI1 conguration

1= Disabled 2= Valve regulation optimization after defrost 3= Discharged battery alarm management 4= Valve forced open (at 100%) 5= Regulation start/stop 6= Regulation backup 7= Regulation security

Regulation start/stop (tLAN-RS485) / Regulation backup (pLAN)

---I85212CO

C Language: Italiano; English Italiano - - - - - - CO C Auxiliary refrigerant

-1=

User dened; 0 = same as main regulation

23=R32 24=HTR01 25= HTR02

26=R23 27 = R1234yf 28 = R1234ze 29 = R455A 30 = R170 31 = R442A 32 = R447A 33 = R448A 34 = R449A 35 = R450A 36 = R452A 37 = R508B 38 = R452B 39 = R513A 40 = R454B 41 = R458A

R404A - - - I 96 223 CO

PROBES

C S1: calibration oset 0 -60(-870), -60 60(870), 60 barg (psig)mAA3433 CO

C S1: calibration gain, 4 to 20 mA 1 -20 20 - A 36 35 CO C Pressure S1: MINIMUM value -1 -20 (-290) Pressure S1:

MAXIMUM value

barg (psig) A 32 31 CO

C Pressure S1: MAXIMUM value 9.3 Pressure S1:

MINIMUM value

200 (2900) barg (psig) A 30 29 CO

C Pressure S1: MINIMUM alarm value -1 -20 (-290) Pressure S1:

MAXIMUM alarm value

barg (psig) A 39 38 CO

C Pressure S1: MAXIMUM alarm value 9.3 Pressure S1:

MINIMUM alarm value

200 (2900) barg (psig) A 37 36 CO

C S2: calibration oset 0 -20 (-36), -20 20 (36), 20 °C (°F), volt A 41 40 CO C S2: calibration gain, 0 to 10 V 1 -20 20 - A 43 42 CO C Temperature S2: MINIMUM alarm value -50 -85(-121) Temperature

S2: MAXIMUM alarm value

°C (°F) A 46 45 CO

C Temperature S2: MAXIMUM alarm value 105 Temperature

S2: MINIMUM alarm value

200 (392) °C (°F) A 44 43 CO

C S3: calibration oset 0 -60 (-870) 60 (870) barg (psig) A 35 34 CO C S3: calibration gain, 4 to 20 mA 1 -20 20 - A 82 81 CO C Pressure S3 : MINIMUM value -1 -20 (-290) Pressure S3:

MAXIMUM value

barg (psig) A 33 32 CO

C Pressure S3: MAXIMUM value 9.3 Pressure S3:

MINIMUM value

200 (2900) barg (psig) A 31 30 CO

C Pressure S3: MINIMUM alarm value -1 -20 (-290) Pressure S3:

MAXIMUM alarm value

barg (psig) A 40 39 CO

C Pressure S3: MAXIMUM alarm value 9.3 Pressure S3:

MINIMUM alarm value

200 (2900) barg (psig) A 38 37 CO

C S4: calibration oset 0 -20 (-36) 20 (36) °C (°F) A 42 41 CO C Temperature S4: MINIMUM alarm value -50 -85(-121) Temperature

S4: MAXIMUM alarm value

°C (°F) A 47 46 CO

C Temperature S4: MAXIMUM alarm value 105 Temperature

S4: MINIMUM alarm value

200 (392) °C (°F) A 45 44 CO

C S1/S3 Maximum dierence (pressure) 0 0 200(2900) bar(psig) A 114 113 CO C S2/S4 Maximum dierence (temperature) 0 0 180(324) °C (°F) A 115 114 CO

C Alarm delay S1 0 0 240 s I 131 258 CO C Alarm delay S2 0 0 240 s I 132 259 CO C Alarm delay S3 0 0 240 s I 133 260 CO C Alarm delay S4 0 0 240 s I 134 261 CO C Enable S1 0 0 1 - D 16 15 CO C Enable S2 0 0 1 - D 17 16 CO C Enable S3 0 0 1 - D 18

17 CO

C Enable S4 0 0 1 - D 19 18 CO

ENG

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

user *

Parameter/description Def. Min. Max. UOM

Type **

CAREL SVP

Modbus®

Note

CONTROL

A Superheat set point 11 LowSH:

threshold

180 (324) K (°F) A 83 82 -

A Valve opening at start-up (evaporator/valve capacity ratio) 50 0 100 % I 60 187 C Valve open in standby

(0= disabled= valve closed; 1=enabled = valve open according to parameter “Valve position in stand-by”)

001-D3635-

C Valve position in stand-by

0 = 25% 1…100% = % opening

0 0 100 % I 92 219 -

C start-up delay after defrost 10 0 60 min I 40 167 CO A Pre-position time 6 0 18000 s I 87 214 A Hot gas bypass temperature set point 10 -85(-121) 200 (392) °C (°F) A 84 83 A Hot gas bypass pressure set point 3 -20 (-290) 200 (2900) barg (psig) A 85 84 A EPR pressure set point 3.5 -20 (-290) 200 (2900) barg (psig) A 86 85 C PID: proportional gain 15 0 800 - A 87 86 C PID: integral time 150 0 1000 s I 61 188 C PID: derivative time 5 0 800 s A 88 87 A LowSH protection: threshold 5 -40 (-72) SH set point K (°F) A 89 88 C LowSH protection: integral time 15 0 800 s A 90 89 A LOP protection: threshold -50 -85(-121) MOP protec-

tion: threshold

°C (°F) A 91 90 -

C LOP protection: integral time 0 0 800 s A 92 91 A MOP protection: threshold 50 LOP protec-

tion: threshold

200 (392) °C (°F) A 93 92 -

C MOP protection: integral time 20 0 800 s A 94 93 A Enable manual valve positioning 0 0 1 - D 32 31 A Manual valve position 0 0 9999 step I 53 180 C Discharge superheat setpoint (CANNOT BE SELECTED) 35 -40(-72) 180 (324) K (F°) A 100 99 C Discharge temperature setpoint (CANNOT BE SELECTED) 105 -85(-121) 200 (392) °C (°F) A 101 100 C Liquid level perc. set point 50 0 100 % A 119 118 -

SPECIAL

A HiTcond: threshold - SELECT WITH PROG. CONT. 80 -85(-121) 200 (392) °C (°F) A 58 57 CO C HiTcond: integral time - SELECT WITH PROG. CONT. 20 0 800 s A 57 56 CO A Modulating thermostat: set point - SELECT WITH PROG. CONT. 0 -85(-121) 200 (392) °C (°F) A 61 60 CO A Modulating thermostat: dierential - SELECT WITH PROG. CONT. 0. 1 0.1 (0.2) 100 (180) °C (°F) A 60 59 CO C Mod. thermostat: SH set point oset - SELECT WITH PROG. CONT. 0 0 (0) 100 (180) K (°F) A 59 58 CO C

Coecient ‘A’ for

control

3.3 -100 800 - A 95 94 -

Coecient ‘B’ for

control

-22.7 -100 800 - A 96 95 C Force manual tuning 0=no; 1= yes 0 0 1 - D 41 40 C Tuning method

0 to 100= automatic selection 101 to 141= manual selection 142 to 254= not allowed 255= PID parameters model identified

0 0 255 - I 80 207 -

C Impostazioni di rete

2 0 30 - I 74 201 CO

A Power supply mode

0= 24 Vac; 1= 24 Vdc

001-D4746CO

C Enable mode single on twin (parameter disabled)

0= Twin; 1= Single

001-D5857CO

C Stop manual positioning if net error

0 = Normal operation; 1 = Stop

001-D5958CO

Dew a high -288 -32768 32767 - I 107 234 CO

ENG

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

user *

Parameter/description Def. Min. Max. UOM

Type **

CAREL SVP

Modbus®

Note

Dew a low -15818 -32768 32767 - I 108 235 CO Dew b high -14829 -32768 32767 - I 109 236 CO Dew b low 16804 -32768 32767 - I 110 237 CO Dew c high -11664 -32768 32767 - I 111 238 CO Dew c low 16416 -32768 32767 - I 112 239 CO Dew d high -23322 -32768 32767 - I 113 240 CO Dew d low -16959 -32768 32767 - I 114 241 CO Dew e high -16378 -32768 32767 - I 115 242 CO Dew e low 15910 -32768 32767 - I 116 243 CO Dew f high -2927 -32768 32767 - I 117 244 CO Dew f low -17239 -32768 32767 - I 118 245 CO Bubble a high -433 -32768 32767 - I 119 246 CO Bubble a low -15815 -32768 32767 - I 120 247 CO Bubble b high -15615 -32768 32767 - I 121 248 CO Bubble b low 16805 -32768 32767 - I 122 249 CO Bubble c high 30803 -32768 32767 - I 123 250 CO Bubble c low 16416 -32768 32767 - I 124 251 CO Bubble d high -21587 -32768 32767 - I 125 252 CO Bubble d low -16995 -32768 32767 - I 126 253 CO Bubble e high -24698 -32768 32767 - I 127 254 CO Bubble e low 15900 -32768 32767 - I 128 255 CO Bubble f high 10057 -32768 32767 - I 129 256 CO Bubble f low -17253 -32768 32767 - I 130 257 CO

C Faulty closure alarm status

0/1=no/yes

001-D4948-

C Battery charge delay 0 0 250 min I 135 262 CO

ALARM CONFIGURATION

C Low superheat alarm delay (LowSH)

(0= alarm disabled)

300 0 18000 s I 62 189 -

C Low evaporation temperature alarm delay (LOP)

(0= alarm disabled)

300 0 18000 s I 63 190 -

C High evaporation temperature alarm delay (MOP)

(0= alarm disabled)

600 0 18000 s I 64 191 -

C High condensing temperature alarm delay (HiTcond)

CANNOT BE SELECTED

600 0 18000 s I 44 171 CO

C Low suction temperature alarm threshold -50 -85(-121) 200 (392) °C (°F) A 97 96 C Low suction temperature alarm delay

(0= alarm disabled)

300 0 18000 s I 65 192 -

VALV E

C EEV minimum steps 50 0 9999 step I 66 193 C EEV maximum steps 480 0 9999 step I 67 194 C EEV closing steps 500 0 9999 step I 68 195 C EEV rated speed 50 1 2000 step/s I 69 196 C EEV rated current 450 0 800 mA I 70 197 C EEV holding current 100 0 250 mA I 71 198 C EEV duty cycle 30 1 100 % I 72 199 C Synchronise position in opening 1 0 1 - D 37 36 C Synchronise position in closing 1 0 1 - D 38 37 -

Tab. 8.b

* User level: A= Service (installer), C= manufacturer. ** Type of variable: A= Analogue; D= Digital; I= Integer CO= parameter settable from driver A or from driver B

8.3 Unit of measure

In the conguration parameters menu, with access by manufacturer password, the user can choose the unit of measure for the driver:

• international system (°C, K, barg);

• imperial system (°F, psig).

Note: the units of measure K and R relate to degrees Kelvin or Rankine adopted for measuring the superheat and the related parameters. When changing the unit of measure, all the values of the parameters saved on the driver and all the measurements read by the probes will be recalculated. This means that when changing the units of measure, control remains unaltered.

Example 1: The pressure read is 100 barg, this will be immediately converted

to the corresponding value of 1450 psig.

Example 2: The “superheat set point” parameter set to 10 K will be immediately

converted to the corresponding value of 18 °F.

Example 3: The “Temperature S4: maximum alarm value” parameter, set to

150 °C, will be immediately converted to the corresponding value of 302 °F.

Note: due to limits in the internal arithmetic of the driver, pressure values above 200 barg (2900 psig) and temperature values above 200 °C (392 °F) cannot be converted

ENG

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

8.4 Variables accessible via serial connection – driver A

Description Default Min Max Type CAREL SVP Modbus® R/W

Probe S1 reading 0 -20 (-290) 200 (2900) A 1 0 R Probe S2 reading 0 -85(-121) 200 (392) A 2 1 R Probe S3 reading 0 -20 (-290) 200 (2900) A 3 2 R Probe S4 reading 0 -85(-121) 200 (392) A 4 3 R Suction temperature 0 -85(-121) 200 (392) A 5 4 R Evaporation temperature 0 -85(-121) 200 (392) A 6 5 R Evaporation pressure 0 -20 (-290) 200 (2900) A 7 6 R Hot gas bypass temperature 0 -85(-121) 200 (392) A 8 7 R EPR pressure (back pressure) 0 -20 (-290) 200 (2900) A 9 8 R Superheat 0 -40 (-72) 180 (324) A 10 9 R Condensing pressure 0 -20 (-290) 200 (2900) A 11 10 R Condensing temperature 0 -85(-121) 200 (392) A 12 11 R Modulating thermostat temperature 0 -85(-121) 200 (392) A 13 12 R Hot gas bypass pressure 0 -20 (-290) 200 (2900) A 14 13 R

gas cooler outlet pressure

0 -20 (-290) 200 (2900) A 15 14 R

gas cooler outlet temperature

0 -85(-121) 200 (392) A 16 15 R

Valve opening 0 0 100 A 17 16 R

gas cooler pressure set point

0 -20 (-290) 200 (2900) A 18 17 R 4 to 20 mA input value (S1) 4 4 20 A 19 18 R 0 to 10 V input value (S2) 0 0 10 A 20 19 R Control set point 0 -60 (-870) 200 (2900) A 21 20 R Controller rmware version 0 0 800 A 25 24 R MOP: suction temperature threshold (S2) 30 -85(-121) 200 (392) A 102 101 R/W

Discharge superheat 0 -40(-72) 180(324) A 104 103 R Discharge temperature 0 -60(-76) 200(392) A 105 104 R Thermal time constant NTC probe S4 50 1 800 A 106 105 R/W MOP: High evaporation temperature threshold 50 LOP: threshold 200 (392) A 107 106 R/W Condensation pressure for subcooling measure 0 -20(-290) 200(2900) A 108 107 R Condensation bubble point 0 -60(-76) 200(392) A 109 108 R Condensation liquid temperature 0 -60(-76) 200(392) A 110 109 R Subcooling 0 -40(-72) 180(324) A 111 110 R

Liquid regulation evaporator/ condenser level percentage

0 0 100 A 116 115 R Valve position 0 0 9999 I 4 131 R Current unit cooling capacity 0 0 100 I 7 134 R/W Adaptive control status - 0 10 I 75 202 R Last tuning result 0 0 8 I 76 203 R Extended measured probe S1 (*) 0 -2000 (-2901) 20000 (29007) I 83 210 R

Extended measured probe S3 (*) 0 -2000 (-2901) 20000 (29007) I 84 211 R

Emergency closing speed valve 150 1 2000 I 86 213 R/W Control mode (comp. BLDC) 1 1 3 I 89 216 R/W

Type of unit for serial comm.

0 0 32767 I 94 221 R

HW code for serial comm.

0 0 32767 I 95 222 R

Reading of probe S1*40 0 -32768 32767 I 97 224 R Reading of probe S2*40 0 -32768 32767 I 98 225 R Reading of probe S3*40 0 -32768 32767 I 99 226 R Reading of probe S4*40 0 -32768 32767 I 100 227 R

ALARMS

Low suction temperature 0 0 1 D 1 0 R LAN error 0 0 1 D 2 1 R EEPROM damaged

00 1 D32R Probe S1 0 0 1 D 4 3 R Probe S2 0 0 1 D 5 4 R Probe S3 0 0 1 D 6 5 R Probe S4 0 0 1 D 7 6 R EEV motor error 0 0 1 D 8 7 R Status of relay 0 0 1 D 9 8 R

ALARMS

LOP (low evaporation temperature) 0 0 1 D 10 9 R MOP (high evaporation temperature) 0 0 1 D 11 10 R LowSH (low superheat) 0 0 1 D 12 11 R

HiTcond (high condensing temperature) 0 0 1 D 13 12 R Status of digital input DI1 0 0 1 D 14 13 R Status of digital input DI2 0 0 1 D 15 14 R Guided initial procedure completed 0 0 1 D 22 21 R/W Adaptive control ineective 0 0 1 D 40 39 R Mains power failure 0 0 1 D 45 44 R Regulation backup from supervisor 0 0 1 D 46 45 R/W Forced valve closing not completed 0 0 1 D 49 48 R/W

PROTECT.

ACTIV.

LowSH (low superheat) 0 0 1 D 50 49 R LOP (low evaporation temperature) 0 0 1 D 51 50 R MOP high evaporation temperature) 0 0 1 D 52 51 R HiTcond (high condensing temperature) 0 0 1 D 53 52 R Direct relay control 0 0 1 D 57 56 R/W Enable LAN mode on service serial port (RESERVED)

0 0 1 D 60 59 R/W

Tab. 8.c

(*) The displayed variable is to be divided by 100, and allows us to appreciate the hundredth of a bar (psig).

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“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

8.5 Variables accessible via serial connection – driver B

Description Default Min Max Type CAREL SVP Modbus® R/W

Valve opening 0 0 100 A 66 65 R Control set point 0 -60 (-870) 200 (2900) A 67 66 R Superheat 0 -40 (-72) 180 (324) A 68 67 R Suction temperature 0 -85 (-121) 200 (392) A 69 68 R Evaporation temperature 0 -85 (-121) 200 (392) A 70 69 R Evaporation pressure 0 -20 (-290) 200 (2900) A 71 70 R EPR pressure (back pressure) 0 -20 (-290) 200 (2900) A 72 71 R Hot gas bypass pressure 0 -20 (-290) 200 (2900) A 73 72 R Hot gas bypass temperature 0 -85 (-121) 200 (392) A 74 73 R

gas cooler outlet temperature

0 -85 (-121) 200 (392) A 75 74 R

gas cooler outlet pressure

0 -20 (-290) 200 (2900) A 76 75 R

gas cooler pressure set point

0 -20 (-290) 200 (2900) A 77 76 R 4 to 20 mA input value (S3) 4 4 20 A 78 77 R MOP: suction temperature threshold (S4) 30 -85 (-121) 200 (392) A 103 102 R/W

Liquid regulation evaporator/ condenser level percentage

0 0 100 A 117 116 R Valve position 0 0 9999 I 49 176 R Current unit cooling capacity 0 0 100 I 50 177 R/W EVD status 0 0 20 I 51 178 R Protector status 0 0 5 I 52 179 R Control mode 1 1 26 I 73 200 R/W Adaptive control status 0 0 6 I 77 204 R Last tuning result 0 0 8 I 78 205 R Extended measured probe S3 (*) 0 -2000 (-2901) 20000 (29007) I 84 211 R Start control delay 6 0 18000 I 87 214 R/W Emergency closing speed valve 150 1 2000 I 86 215 R/W Valve opening position % in standby 0 0 100 I 92 219 R/W

ALARMS

LowSH (low superheat) 0 0 1 D 26 25 R LOP (low evaporation temperature) 0 0 1 D 27 26 R MOP (high evaporation temperature) 0 0 1 D 28 27 R Low suction temperature 0 0 1 D 29 28 R EEV motor error 0 0 1 D 30 29 R Status of relay 0 0 1 D 31 30 R

ALARMS

Adaptive control ineective 0 0 1 D 42 41 R

Value backup digital input 0 0 1 D 48 47 R/W LowSH protection status

0 0 1 D 54 53 R

LOP protection status

0 0 1 D 55 54 R

MOP protection status

0 0 1 D 56 55 R

Direct relay control 0 0 1 D 61 60 R/W

Tab. 8.d

(*) The displayed variable is to be divided by 100, and allows us to appreciate the hundredth of a bar (psig). Type of variable: A= analogue; D= digital; I= integer SVP= variable address with CAREL protocol on 485 serial card. Modbus®: variable address with Modbus® protocol on 485 serial card.

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“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

8.6 Variables used based on the type of control

The table below shows the variables used by the drivers depending on the “Main control” parameter. At the end of the variable list are the screens used to check the probe and valve electrical connections for driver A and driver B. These variables are visible on the display by accessing display mode (see paragraph 3.4) and via serial connection with VPM, PlantVisorPRO,… (see paragraphs 8.4, 8.5) Procedure for showing the variables on the display:

• press the Help and Enter buttons together to select driver A or B;

• press the UP/DOWN button;

• press the DOWN button to move to the next variable/screen;

• press the Esc button to return to the standard display.

Main control

Variable displayed Superheat

control

Transcritical

Gas bypass

temperature

Gas bypass

pressure

EPR back

pressure

Analogue

positioning

I/O expander for pCO

Control with level sensor

Valve opening (%) • • • • • • • • Valve position (step) • • • • • • • • Current unit cooling capacity • • • • • • • Set point control • • • Superheat • Suction temperature • Evaporation temperature • Evaporation pressure • Condensing temperature (*) Condensing pressure (*) Modulating thermostat temperature(*) EPR pressure (back pressure) • Hot gas bypass pressure • Hot gas bypass temperature •

gas cooler outlet temperature

•

gas cooler outlet pressure

•

gas cooler pressure set point

• Probe S1 reading • • • • • • • • Probe S2 reading • • • • • • • • Probe S3 reading • • • • • • • • Probe S4 reading • • • • • • • 4 to 20 mA input value •• 0 to 10 V input value •• Status of digital input DI1(**) • • • • • • • • Status of digital input DI2(**) • • • • • • • • EVD rmware version • • • • • • • • Display rmware version • • • • • • • • Adaptive control status 0= not enabled or stopper 1= monitoring superheat 2= monitoring suction temperature 3= wait superheat stabilisation 4= wait suction temperature stabilisation 5= applying step 6= positioning valve 7= sampling response to step 8= wait stabilisation in response to step 9= wait tuning improvement 10= stop, max number of attempts exceeded

•

Last tuning result 0= no attempt performed 1= attempt interrupted 2= step application error 3= time constant/delay error 4= model error 5= tuning ended successfully on suction temperature 6= tuning ended successfully on superheat

•

Liquid level percentage •

Tab. 8.e

(*) The value of the variable is not displayed (**) Status of digital input: 0= open, 1= closed.

Note: the readings of probes S1, S2, S3, S4 is always displayed, regardless

of whether or not the probe is connected

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“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

9. ALARMS

9.1 Alarms

There are two types of alarms for each driver:

• system: valve motor, EEPROM, probe and communication;

• control: low superheat, LOP, MOP, low suction temperature.

The activation of the alarms depends on the setting of the threshold and activation delay parameters. Setting the delay to 0 disables the alarms. The EEPROM alarm always shuts down the controller. All the alarms are reset automatically, once the causes are no longer present. The alarm relay contact will open if the relay is congured as alarm relay using the corresponding parameter. The signalling of the alarm event on the driver depends on whether the LED board or the display board is tted, as shown in the table below.

Note: the alarm LED only comes on for the system alarms, and not for

the control alarms.

Example: display system alarm on LED board for driver A and for driver B

EVD evolution

twin

EVD evolution

twin

Fig. 9.a

Note:the alarm LED comes on to signal a mains power failure only if the EVBAT*** module (accessory) has been connected, guaranteeing the power required to close the valve.

The display shows both types of alarms, in two dierent modes:

system alarm: on the main page, the ALARM message is displayed, ashing.

Pressing the Help button displays the description of the alarm and, at the top right, the total number of active alarms and the driver where the alarm occurred (A / B). The same alarm may occur on both drivers (e.g. probe alarm)

Superheating

4.9 K

Valve opening

44 %

OFF

ALARM

Relais

Valve motor error

A/B

1/3

Fig. 9.b

• control alarm: next to the ashing ALARM message, the main page shows

the type of protector activated.

Superheating

4.9 K

Valve opening

44 %

OFF MOP ALARM

Relais

A/B

Fig. 9.c

Note:

• to display the alarm queue, press the Help button and scroll using the

UP/DOWN buttons. If at the end of the alarms for driver A/B the following message is shown:

Alarms active on driver B/A

1. press Esc to return to the standard display;

2. press the Help and Enter buttons together to move to the corresponding

driver;

3. press Help to display the required alarm queue.

• the control alarms can be disabled by setting the corresponding delay to

zero.

Table of alarms

Type of alarm Cause of

the alarm

LED Display Relay Reset Eects on

control

Checks/ solutions

Probe S1 Probe S1 faulty

or exceeded set alarm range

red alarm LED

ALARM ashing

Depends on conguration parameter

automatic Depends on

parameter “Probe S1 alarm management”

Check the probe connections. Check the “Probe S1 alarm management”, & “Pressure S1: MINIMUM & MAXIMUM alarm value” parameters

Probe S2 Probe S2 faulty

or exceeded set alarm range

red alarm LED

ALARM ashing

Depends on conguration parameter

automatic Depends on

parameter “Probe S2 alarm management”

Check the probe connections. Check the “Probe S2 alarm management”, & “Temperature S2: MINIMUM & MAXIMUM alarm value” parameters

Probe S3 Probe S3 faulty

or exceeded set alarm range

red alarm LED

ALARM ashing

Depends on conguration parameter

automatic Depends on

parameter “Probe S3 alarm management”

Check the probe connections. Check the “Probe S3 alarm management”, & “Pressure S3: MINIMUM & MAXIMUM alarm value” parameters

Probe S4 Probe S4 faulty

or exceeded set alarm range

red alarm LED

ALARM ashing

Depends on conguration parameter

automatic Depends on

parameter “Probe S4 alarm management”

Check the probe connections. Check the “Probe S4 alarm management”, & “Temperature S4: MINIMUM & MAXI-

MUM alarm value ” LowSH (low superheat)

LowSH protection activated

- ALARM ashing & LowSH

Depends on conguration parameter

automatic Protection action

already active

Check the “LowSH protection: threshold & alarm delay” parameters

LOP (low evaporation temperature)

LOP protection activated

- ALARM ashing & LOP

Depends on conguration parameter

automatic Protection action

already active

Check the “Protection LOP: threshold & alarm delay” para-

meters MOP (high evaporation temperature)

MOP protection activated

- ALARM ashing & MOP

Depends on conguration parameter

automatic Protection action

already active

Check the “MOP protection: threshold & alarm delay” parameters

Low suction temperature

Threshold and delay time exceeded

- ALARM ashing

Depends on conguration parameter

automatic No eect Check the threshold and delay

parameters.

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“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

Type of alarm Cause of

the alarm

LED Display Relay Reset Eects on

control

Checks/ solutions

EEPROM damaged

EEPROM for operating and/or unit parameters damaged

red alarm LED

ALARM ashing Depends on

conguration parameter

Replace controller/ Contact service

Total shutdown Replace the controller/Contact

service

EEV motor error Valve motor fault,

not connected

red alarm LED

ALARM ashing Depends on

conguration parameter

automatic Interruption Check the connections and the con-

dition of the motor. Switch controller o and on again

LAN error LAN network

communication error

green NET LED ashing

ALARM ashing Depends on

conguration parameter

automatic Control based on

DI1/DI2

Check the network address settings

LAN network connection error

NET LED oALARM ashing Depends on

conguration parameter

automatic Control based on

DI1/DI2

Check the connections and that the pCO is on and working

Display connection error

No communication between controller and display

- ERROR message No change Replace controller/ disply

No eect Check the controller/display and

connectors

Driver B disconnected

Connection error, driver B

red alarm LED B

ALARM ashing Depends on

conguration parameter

automatic Driver B: forced

closing Driver A: no eect

Replace the controller

Alarms active on driver A (1)

Generic error, driver A

red alarm LED A

ALARM ashing No change automatic No eect See list of alarms for driver A

Alarms active on driver B (2)

Generic error, driver B

red alarm LED B

ALARM ashing No change automatic No eect See list of alarms for driver B

Battery discharged (**)

Battery discharged or faulty or electrical connection interrupted

red alarm LED ashing

Alarm ashing No change replace the

battery

No eect If the alarm persists for more than 3

hours (recharge time for EVBAT00500) replace the battery

Adaptive control ineective

Tuning failed - ALARM ashing No change automatic No eect Change “Main control” parameter

setting Wrong power supply mode (*)

DC driver power supply with “Power supply mode” parameter set to AC power supply

Green POWER LED ashingRed alarm LED

- Depends on the conguration parameter

Change “Power supply mode” parameter setting

Total shutdown Check the “Power supply mode”

parameter and power supply

Pressure dierence

Maximum pressure dierence threshold exceeded (S1-S3)

Red alarm LED

ALARM ashing Depends on the

conguration parameter

Automatic Depends on the

"Probe S1/S3 alarm management" parameters

Check the probe connections. Check the parameters "Probe S1/S3 alarm management" and "Pressure S1/ S3: MINIMUM and MAXIMUM alarm

values" Temperature dierence

Maximum pressure dierence threshold exceeded (S2-S4)

Red alarm LED

ALARM ashing Depends on the

conguration parameter

Automatic Depends on the

"Probe S2/S4 alarm management" parameters

Check the probe connections. Check

the parameters "Probe S2/S4 alarm

management" and "Temperature S2/

S4: MINIMUM and MAXIMUM alarm

values"

Tab. 9.a

1) Message that appears at the end of the list of alarms for driver B. (2) Message that appears at the end of the list of alarms for driver A. (*) In the event of AC power supply with “Power supply mode” set to DC, no alarm is displayed (**) Alarm only visible if driver connected to EVDBAT00400 battery module

9.2 Alarm relay conguration

The relay contacts are open when the controller is not powered. During normal operation, the relay can be disabled (and thus will be always open) or congured as:

• alarm relay : during normal operation, the relay contact is closed, and opens

when any alarm is activated. It can be used to switch o the compressor and the system in the event of alarms.

• solenoid valve relay : during normal operation, the relay contact is closed,

and is open only in standby. There is no change in the event of alarms.

• solenoid valve relay + alarm : during normal operation, the relay contact

is closed, and opens in standby and/or for LowSH, MOP, HiTcond and low suction temperature alarms. This is because following such alarms, the user may want to protect the unit by stopping the ow of refrigerant or switching o the compressor. The LOP alarm is excluded, as in the event of low evaporation temperature closing the solenoid valve would worsen the situation.

• Direct control: the relay is actuated by a variable accessible by serial;

• Failed closing alarm relay (open with alarm);

• Reverse failed closing alarm relay (closed with alarm).

In the event of a mains power failure, if the driver is connected to the Ultracap module, the forced emergency valve closing procedure starts and the red LED comes. At the end of the emergency closing procedure, the outcome is indicated by the value of the parameter “Failed closing alarm status”: 0 = Closing successful; 1 = Closing failed.

The driver will then switch o. If the closing procedure fails, when next restarting, if the parameter “Relay conguration” = 8 or 9 the display will show the “Battery discharged” alarm and the relay will be activated based on the setting (open or closed).

Note: the “Battery discharged” alarm: has no aect on the positioning of the valve, it is signal-only; is not activated if the driver has a direct current power supply (Vdc).

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“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

Parameter/description Def.

Relay conguration: 1= Disabled 2= Alarm relay (open when alarm active) 3= Solenoid valve relay (open in standby) 4= Valve + alarm relay (open in standby and control alarms) 5= Reversed alarm relay (closed in case of alarm) 6= Valve status relay (open if valve is closed) 7= Direct control 8= Failed closing alarm relay(open with alarm) 9= Reverse failed closing alarm relay (closed with alarm)

Alarm relay

Tab. 9.b

9.3 Probe alarms

The probe alarms are part of the system alarms. When the value measured by one of the probes is outside of the eld dened by the parameters corresponding to the alarm limits, an alarm is activated. The limits can be set independently of the range of measurement. Consequently, the eld outside of which the alarm is signalled can be restricted, to ensure greater safety of the controlled unit.

Important: in applications that use programmable control it may be

necessary to exclude the alarms generated by the probes:

Parameter/description Def. Min. Max. UOM

PROBES Enable S1 1 0 1 Enable S2 1 0 1 Enable S3 1 0 1 Enable S4 1 0 1 -

Note:

• the alarm limits can also be set outside of the range of measurement, to

avoid unwanted probe alarms. In this case, the correct operation of the unit or the correct signalling of alarms will not be guaranteed;

• by default, after having selected the type of probe used, the alarm limits

will be automatically set to the limits corresponding to the range of measurement of the probe.

Parameter/description Def. Min. Max. UOM

PROBESs S1 alarm MIN pressure (S1_ AL_MIN)

-1 -20 (-290) S1_AL_MAX barg (psig)

S1 alarm MAX pressure (S1_ AL_MAX)

9.3 S1_AL_MIN 200 (2900) barg (psig)

Alarm delay S1 0 0 240 s S2 alarm MIN temp. (S2_AL_MIN)

-50 -60 S2_AL_MAX °C/°F

S2 alarm MAX temp. (S2_ AL_MAX)

105 S2_AL_MIN 200 (392) °C (°F)

Alarm delay S2 0 0 240 s S3 alarm MIN pressure (S3_ AL_MIN)

-1 -20 S3_AL_MAX barg (psig)

S3 alarm MAX pressure (S3_ AL_MAX)

9.3 S3_AL_MIN 200 (2900) barg (psig)

Alarm delay S3 0 0 240 s S4 alarm MIN temp. (S4_AL_MIN)

-50 -60 S4_AL_MAX °C/°F

S4 alarm MAX temp. (S4_ AL_MAX)

105 S4_AL_MIN 200 (392) °C (°F)

Alarm delay S4 0 0 240 s

Tab. 9.c

The behaviour of the driver in response to probe alarms can be congured, using the manufacturer parameters. The options are:

• no action (control continues but the correct measurement of the variables

is not guaranteed);

• forced closing of the valve (control stopped);

• valve forced to the initial position (control stopped).

Parameter/description Def. Min. Max. UOM

CONFIGURATION Probe S1 alarm management: 1= No action 2= Forced valve closing 3= Valve in xed position 4= Use backup probe S3 (*) (*)= CANNOT BE SELECTED

Valve in xed position - - -

Probe S2 alarm management: 1= No action 2= Forced valve closing 3= Valve in xed position 4= Use backup probe S4 (*) (*)= CANNOT BE SELECTED

Valve in xed position - - -

Probe S3 alarm management: 1= No action 2= Forced valve closing 3= Valve in xed position

No action - - -

Probe S4 alarm management: 1= No action 2= Forced valve closing 3= Valve in xed position

No action - - -

CONTROL Valve opening at start-up (evaporator/valve capacity ratio)

50 0 100 %

Tab. 9.d

9.4 Control alarms

These are alarms that are only activate during control.

Protector alarms

The alarms corresponding to the LowSH, LOP and MOP protectors are only activated during control when the corresponding activation threshold is exceeded, and only when the delay time dened by the corresponding parameter has elapsed. If a protector is not enabled (integral time= 0 s), no alarm will be signalled. If before the expiry of the delay, the protector control variable returns back inside the corresponding threshold, no alarm will be signalled.

Note: this is a likely event, as during the delay, the protection function

will have an eect.

If the delay relating to the control alarms is set to 0 s, the alarm is disabled. The protectors are still active, however. The alarms are reset automatically.

Low suction temperature alarm

The low suction temperature alarm is not linked to any protection function. It features a threshold and a delay, and is useful in the event of probe or valve malfunctions to protect the compressor using the relay to control the solenoid valve or to simply signal a possible risk. In fact, the incorrect measurement of the evaporation pressure or incorrect conguration of the type of refrigerant may mean the superheat calculated is much higher than the actual value, causing an incorrect and excessive opening of the valve. A low suction temperature measurement may in this case indicate the probable ooding of the compressor, with corresponding alarm signal. If the alarm delay is set to 0 s, the alarm is disabled. The alarm is reset automatically, with a xed dierential of 3°C above the activation threshold.

Relay activation for control alarms

As mentioned in the paragraph on the conguration of the relay, in the event of LowSH, MOP and low suction temperature alarms, the driver relay will open both when congured as an alarm relay and congured as a solenoid + alarm relay.

ENG

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

In the event of LOP alarms, the driver relay will only open if congured as an alarm relay.

Parameter/Description Def. Min. Max. UOM

CONTROL LowSH protection: threshold 5 -40 (-72) SH set point K (°F) LowSH protection: integral time 15 0 800 s LOP protection: threshold -50 -60 (-76) MOP: thre-

shold

°C (°F)

LOP protection: integral time 0 0 800 s MOP protection: threshold 50 LOP: th-

reshold

200 (392) °C (°F)

MOP protection: integral time 20 0 800 s ALARM CONFIGURATION Low superheat alarm delay (LowSH) (0= alarm disabled)

300 0 18000 s

Low evaporation temperature alarm delay (LOP) (0= alarm disabled)

300 0 18000 s

High evaporation temperature alarm delay (MOP) (0= alarm disabled)

600 0 18000 s

Low suction temperature alarm threshold

-50 -60 (-76) 200 (392) °C (°F)

Low suction temperature alarm delay

300 0 18000 s

Tab. 9.e

9.5 EEV motor alarm

At the end of the commissioning procedure and whenever the controller is powered up, the valve motor error recognition procedure is activated. This precedes the forced closing procedure and lasts around 10 s. The valve is kept stationary to allow any valve motor faults or missing or incorrect connections to be detected. In any of these cases, the corresponding alarm is activated, with automatic reset. The controller will go into wait status, as it can longer control the valve. The procedure can be avoided by keeping the respective digital input closed for each driver. In this case, after having powered up the controller, forced closing of the valve is performed immediately.

Important: after having resolved the problem with the motor, it is recommended to switch the controller o and on again to realign the position of the valve. If this is not possible, the automatic procedure for synchronising the position may help solve the problem, nonetheless correct control will not be guaranteed until the next synchronisation.

9.6 LAN error alarm

Note: in the event of LAN error, a parameter can be set to disable “Manual positioning”.

If the connection to the LAN network is oine for more than 6s due to an electrical problem, the incorrect conguration of the network addresses or the malfunction of the pCO controller, a LAN error alarm will be signalled. The LAN error aects the operation of the controller as follows:

• case 1: unit in standby, digital input DI1/DI2 disconnected; driver A/B will

remain permanently in standby and control will not be able to start;

• case 2: unit in control, digital input DI1/DI2 disconnected: the driver will

stop control and will go permanently into standby;

• case 3: unit in standby, digital input DI1/DI2 connected: the driver will

remain in standby, however control will be able to start if the digital input is closed. In this case, it will start with “current cooling capacity”= 100%;

• case 4: unit in control, digital input DI1/DI2 connected: driver A/B will

remain in control status, maintaining the value of the “current cooling capacity”. If the digital input opens, the driver will go to standby and control will be able to start again when the input closes. In this case, it will start with “current cooling capacity”= 100%.

ENG

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

10. TROUBLESHOOTING

The following table lists a series of possible malfunctions that may occur when starting and operating the driver and the electronic valve. These cover the most common problems and are provided with the aim of oering an initial response for resolving the problem.

PROBLEM CAUSE SOLUTION

The superheat value measured is incorrect

The probe does not measure correct values Check that the pressure and the temperature measured are correct and that the probe

position is correct. Check that the minimum and maximum pressure parameters for the pressure transducer set on the driver correspond to the range of the pressure probe installed. Check the correct probe electrical connections.

The type of refrigerant set is incorrect Check and correct the type of refrigerant parameter. Liquid returns to the compressor during control

The type of valve set is incorrect Check and correct the type of valve parameter.

The valve is connected incorrectly (rotates

in reverse) and is open

Check the movement of the valve by placing it in manual control and closing or opening it completely. One complete opening must bring a decrease in the superheat and vice-versa. If the movement is reversed, check the electrical connections.

The superheat set point is too low Increase the superheat set point. Initially set it to 12 °C and check that there is no

longer return of liquid. Then gradually reduce the set point, always making sure there is no return of liquid.

Low superheat protection ineective If the superheat remains low for too long with the valve that is slow to close, increase

the low superheat threshold and/or decrease the low superheat integral time. Initially set the threshold 3 °C below the superheat set point, with an integral time of 3-4 seconds. Then gradually lower the low superheat threshold and increase the low superheat integral time, checking that there is no return of liquid in any operating conditions.

Stator broken or connected incorrectly Disconnect the stator from the valve and the cable and measure the resistance of the

windings using an ordinary tester. The resistance of both should be around 36 ohms. Otherwise replace the stator. Finally, check the electrical connections of the cable to the driver.

Valve stuck open Check if the superheating is always low (<2 °C) with the valve position permanently at

0 steps. If so, set the valve to manual control and close it completely. If the superheat is

always low, check the electrical connections and/or replace the valve. The “valve opening at start-up” parameter is too high on many showcases in which the control set point is often reached (for multiplexed showcases only)

Decrease the value of the “Valve opening at start-up” parameter on all the utilities,

making sure that there are no repercussions on the control temperature.

Liquid returns to the compressor only after defrosting (for multiplexed showcases only)

The pause in control after defrosting is too short (for MasterCase, MasterCase 2 and mpxPRO only)

Increase the value of the “valve control delay after defrosting” parameter.

The superheat temperature measured by the driver after defrosting and before reaching operating conditions is very low for a few minutes

Check that the LowSH threshold is greater than the superheat value measured and that

the corresponding protection is activated (integral time > 0sec). If necessary, decrease

the value of the integral time.

The superheat temperature measured by the driver does not reach low values, but there is still return of liquid to the compressor rack

Set more reactive parameters to bring forward the closing of the valve: increase the

proportional factor to 30, increase the integral time to 250 sec and increase the deriva-

tive time to 10 sec.

Many showcases defrosting at the same time

Stagger the start defrost times. If this is not possible, if the conditions in the previous

two points are not present, increase the superheat set point and the LowSH thresholds

by at least 2 °C on the showcases involved. The valve is signicantly oversized Replace the valve with a smaller equivalent.

Liquid returns to the compressor only when starting the controller (after being OFF)

The “valve opening at start-up” parameter is set too high

Check the calculation in reference to the ratio between the rated cooling capacity of

the evaporator and the capacity of the valve; if necessary, lower the value.

The superheat value swings around the set point with an amplitude greater than 4°C

The condensing pressure swings Check the controller condenser settings, giving the parameters “blander” values (e.g.

increase the proportional band or increase the integral time). Note: the required

stability involves a variation within +/- 0.5 bars. If this is not eective or the settings

cannot be changed, adopt electronic valve control parameters for perturbed systems

(see paragraph 8.3) The superheat swings even with the valve set in manual control (in the position corresponding to the average of the working values)

Check for the causes of the swings (e.g. low refrigerant charge) and resolve where pos-

sible. If not possible, adopt electronic valve control parameters for perturbed systems

(see paragraph 8.3).

The superheat does NOT swing with the valve set in manual control (in the position corresponding to the average of the working values)

As a rst approach , decrease (by 30 to 50 %) the proportional factor. Subsequently

try increasing the integral time by the same percentage. In any case, adopt parameter

settings recommended for stable systems.

The superheat set point is too low Increase the superheat set point and check that the swings are reduced or disappear.

Initially set 13 °C, then gradually reduce the set point, making sure the system does not

start swinging again and that the unit temperature reaches the control set point.

ENG

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

PROBLEM CAUSE SOLUTION

In the start-up phase with high evaporator temperatures, the evaporation pressure is high

MOP protection disabled or ineective Activate the MOP protection by setting the threshold to the required saturated eva-

poration temperature (high evaporation temperature limit for the compressors) and setting the MOP integral time to a value above 0 (recommended 4 seconds). To make

the protection more reactive, decrease the MOP integral time. Refrigerant charge excessive for the system or extreme transitory conditions at start-up (for showcases only).

Apply a “soft start” technique, activating the utilities one at a time or in small groups. If

this is not possible, decrease the values of the MOP thresholds on all the utilities.

In the start-up phase the low pressure protection is activated (only for units with compressor on board)

The “Valve opening at start-up” parameter is set too low

Check the calculation in reference to the ratio between the rated cooling capacity of

the evaporator and the capacity of the valve; if necessary increase the value. The driver in conguration does not start control and the valve remains closed

Check the connections. Check that the pCO application connected to the driver (where

featured) correctly manages the driver start signal. Check that the driver is NOT in

stand-alone mode. The driver in stand-alone conguration does not start control and the valve remains closed

Check the connection of the digital input. Check that when the control signal is sent

that the input is closed correctly. Check that the driver is in stand-alone mode.

LOP protection disabled Set a LOP integral time greater than 0 sec. LOP protection ineective Make sure that the LOP protection threshold is at the required saturated evaporation

temperature (between the rated evaporation temperature of the unit and the corre-

sponding temperature at the calibration of the low pressure switch) and decrease the

value of the LOP integral time. Solenoid blocked Check that the solenoid opens correctly, check the electrical connections and the

operation of the relay. Insucient refrigerant Check that there are no bubbles in the sight glass upstream of the expansion valve.

Check that the subcooling is suitable (greater than 5 °C); otherwise charge the circuit. The valve is connected incorrectly (rotates in reverse) and is open

Check the movement of the valve by placing it in manual control and closing or ope-

ning it completely. One complete opening must bring a decrease in the superheat and

vice-versa. If the movement is reversed, check the electrical connections. Stator broken or connected incorrectly Disconnect the stator from the valve and the cable and measure the resistance of the

windings using an ordinary tester.

The resistance of both should be around 36 ohms. Otherwise replace the stator. Finally,

check the electrical connections of the cable to the driver. The “Valve opening at start-up” parameter is set too low

Check the calculation in reference to the ratio between the rated cooling capacity of

the evaporator and the capacity of the valve; if necessary lower the value.

The unit switches o due to low pressure during control (only for units with compressor on board)

LOP protection disabled Set a LOP integral time greater than 0 sec. LOP protection ineective Make sure that the LOP protection threshold is at the required saturated evaporation

temperature (between the rated evaporation temperature of the unit and the corre-

sponding temperature at the calibration of the low pressure switch) and decrease the

value of the LOP integral time. Solenoid blocked Check that the solenoid opens correctly, check the electrical connections and the

operation of the control relay. Insucient refrigerant Check that there are no bubbles of air in the liquid indicator upstream of the expansion

valve. Check that the subcooling is suitable (greater than 5 °C); otherwise charge the

circuit. The valve is signicantly undersized Replace the valve with a larger equivalent. Stator broken or connected incorrectly Disconnect the stator from the valve and the cable and measure the resistance of the

windings using an ordinary tester.

The resistance of both should be around 36 ohms. Otherwise replace the stator. Finally,

check the electrical connections of the cable to the driver (see paragraph 5.1). Valve stuck closed Use manual control after start-up to completely open the valve. If the superheat

remains high, check the electrical connections and/or replace the valve.

The showcase does not reach the set temperature, despite the value being opened to the maximum (for multiplexed showcases only)

Solenoid blocked Check that the solenoid opens correctly, check the electrical connections and the

operation of the relay. Insucient refrigerant Check that there are no bubbles of air in the liquid indicator upstream of the expansion

valve. Check that the subcooling is suitable (greater than 5 °C); otherwise charge the

windings using an ordinary tester.

The resistance of both should be around 36 ohms. Otherwise replace the stator. Finally,

check the electrical connections of the cable to the driver (see paragraph 5.1). Valve stuck closed Use manual control after start-up to completely open the valve. If the superheat

remains high, check the electrical connections and/or replace the valve.

The showcase does not reach the set temperature, and the position of the valve is always 0 (for multiplexed showcases only)

The driver in conguration does not start control and the valve remains closed

Check the connections. Check that the pCO application connected to the driver (where

featured) correctly manages the driver start signal. Check that the driver is NOT in

stand-alone mode. The driver in stand-alone conguration does not start control and the valve remains closed

Check the connection of the digital input. Check that when the control signal is sent

that the input is closed correctly. Check that the driver is in stand-alone mode.

Tab. 10.a

ENG

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

11. TECHNICAL SPECIFICATIONS

Power supply (Lmax= 5 m)

• 24 Vac (+10/-15%) to be protected by external 2 A type T fuse.

• 24 Vdc (+10/-15%) 50/60 Hz to be protected by external 2 A type T fuse. Use a dedicated class 2 transformer (max 100 VA).

Power input 16.2 W ; 35 VA Emergency power supply 22 Vdc+/-5%. (If the optional EVBAT00400 module is installed), Lmax=5 m Insulation between relay output and

other outputs

reinforced; 6 mm in air, 8 mm on surface; 3750 V insulation

Motor connection 4-wire shielded cable AWG 22, Lmax 10 m or AWG 14, Lmax= 50 m Digital input connection Digital input to be activated from voltage-free contact or transistor to GND. Closing current 5 mA; Lmax< 30 m Probes (Lmax=10 m; with shielded cable less than 30 m)

S1 ratiometric pressure probe (0 to 5 V):

• resolution 0.1 % fs; • measurement error: 2% fs maximum; 1% typical electronic pressure probe (4 to 20 mA):

• resolution 0.5 % fs; • measurement error: 8% fs maximum; 7% typical remote electronic pressure probe (4 to 20mA). Maximum number of drivers connected=5 combined ratiometric pressure probe (0 to 5 V):

• resolution 0.1 % fs; • measurement error: 2 % fs maximum; 1 % typical 4 to 20 mA input (max 24 mA):

• resolution 0.5% fs; • measurement error: 8% fs maximum; 7% typical 0 to 5 V input:

• resolution 0.1 % FS; • measurement error: 2% FS maximum; 1% typical

S2 low temperature NTC:

• 10 k at 25°C, -50T90 °C; • measurement error: 1°C in range -50T50 °C; 3°C in range +50T90 °C high temperature NTC:

• 50 k at 25°C, -40T150 °C; • measurement error: 1.5 °C in range -20T115 °C, 4 °C in range outside of -20T115 °C Combined NTC:

• 10 k at 25 °C, -40T120 °C; • measurement error: 1 °C in range -40T50 °C; 3°C in range +50T90 °C 0 to 10 V input (max 12 V):

• resolution 0.1 % fs; • measurement error: 9% fs maximum; 8% typical

S3 ratiometric pressure probe (0 to 5 V):

• resolution 0.1 % fs; • measurement error: 2% fs maximum; 1% typical electronic pressure probe (4 to 20 mA):

• resolution 0.5 % fs; • measurement error: 8% fs maximum; 7% typical remote electronic pressure probe (4 to 20mA). Maximum number of drivers connected=5 4 to 20 mA input (max 24 mA):

• resolution 0.5% fs; • measurement error: 8% fs maximum; 7% typical combined ratiometric pressure probe (0 to 5 V):

• resolution 0.1 % fs, • measurement error: 2 % fs maximum; 1 % typical 0 to 5 V input:

• resolution 0.1 % FS; • measurement error: 2% FS maximum; 1% typical

S4 low temperature NTC:

• 10 k at 25°C, -50T105°C; • measurement error: 1°C in range -50T50 °C; 3°C in range 50T90°C high temperature NTC:

• 50 k at 25°C, -40T150°C; • measurement error: 1.5°C in range -20T115°C 4°C in range outside of -20T115°C Combined NTC:

• 10 k at 25°C, -40T120°C; • measurement error 1°C in range -40T50°C; 3°C in range +50T90°C

Relay output normally open contact; 5 A, 250 Vac resistive load; 2 A, 250 Vac inductive load (PF=0.4); Lmax=50 m;

UL: 250 Vac, 5 A resistive, 1A FLA, 6A LRA, pilot duty D300. 30000 cycles VDE: 1(1)A PF=0.6

Power supply to active probes (V

REF

) +5 Vdc ±2% o 12 Vdc ±10% depending on type of probe set RS485 serial connection Lmax=1000 m, shielded cable tLAN connection Lmax=30 m, shielded cable pLAN connection Lmax=500 m, shielded cable Assembly DIN rail Connectors plug-in, cable size 0.5 to 2.5 mm

(12 to 20 AWG) Dimensions LxHxW= 70x110x60 Operating conditions -25T60°C (don’t use EVDIS* under -20°C); <90% RH non-condensing Storage conditions -35T60°C (don’t store EVDIS* under -30°C), humidity 90% RH non-condensing Index of protector IP20 Environmental pollution 2 ( normal ) Resistance to heat and re Category D Immunity against voltage surges Category 1 Rated impulse voltage

2500V

Type of relay action 1C microswitching Insulation class 2 Software class and structure A Conformity Electrical safety: EN 60730-1, EN 61010-1, UL873, VDE 0631-1

Electromagnetic compatibility: EN 61000-6-1, EN 61000-6-2, EN 61000-6-3, EN 61000-6-4; EN61000-3-2, EN55014-1, EN55014-2, EN61000-3-3.

Tab. 11.a

ENG

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

12. APPENDIX 1: VPM VISUAL PARAMETER MANAGER

12.1 Installation

On the http://ksa.carel.com website, under the Parametric Controller Software section, select Visual Parameter Manager. A window opens, allowing 3 les to be downloaded:

1. VPM_CD.zip: for burning to a CD;

2. Upgrade setup;

3. Full setup: the complete program.

For rst installations, select Full setup, for upgrades select Upgrade setup. The program is installed automatically, by running setup.exe.

Note: if deciding to perform the complete installation (Full setup), rst

uninstall any previous versions of VPM.

12.2 Programming (VPM)

When opening the program, the user needs to choose the device being congured: EVD evolution. The Home page then opens, with the choice to create a new project or open an existing project. Choose new project and enter the password, which when accessed the rst time can be set by the user..

Fig. 12.a

Then the user can choose to:

1. directly access the list of parameters for the EVD evolution twin

saved to EEPROM: select “tLAN”;

This is done in real time (ONLINE mode), at the top right set the network address 198 and choose the guided recognition procedure for the USB communication port. Enter at the Service or Manufacturer level.

Fig. 12.b

Fig. 12.c

2. select the model from the range and create a new project or

choose an existing project: select “Device model”.

A new project can be created, making the changes and then connecting later on to transfer the conguration (OFFLINE mode). Enter at the Service or Manufacturer level.

• select Device model and enter the corresponding code

Fig. 12.d

• go to Congure device: the list of parameters will be displayed, allowing

the changes relating to the application to be made.

Fig. 12.e

At the end of conguration, to save the project choose the following command, used to save the conguration as a le with the .hex extension.

File -> Save parameter list.

To transfer the parameters to the controller, choose the “Write” command. During the write procedure, the 2 LEDs on the converter will ash.

ENG

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

Fig. 12.f

Note: the program On-line help can be accessed by pressing F1.

12.3 Copying the setup

On the Congure device page, once the new project has been created, to transfer the list of conguration parameters to another controller:

• read the list of parameters from the source controller with the “Read”

command;

• remove the connector from the service serial port;

• connect the connector to the service port on the destination controller;

• write the list of parameters to the destination controller with the “Write”

command.

Important: the parameters can only be copied between controllers with the same code. Dierent rmware versions may cause compatibility problems.

12.4 Setting the default parameters

When the program opens:

• select the model from the range and load the associated list of parameters;

• go to “Congure device”: the list of parameters will be shown, with the

default settings.

• connect the connector to the service serial port on the destination

controller;

• select “Write”. During the write procedure, the LEDs on the converter will

ash.

The controller parameters will now have the default settings.

12.5 Updating the controller and display

rmware

The controller and display rmware must be updated using the VPM program on a computer and the USB/tLAN converter, which is connected to the device being programmed (see paragraph 2.7 for the connection diagram). The rmware can be downloaded from http://ksa.carel.com. See the VPM On-line help.

ENG

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

13. APPENDIX 2: EVD EVOLUTION SINGLE

Setting the “Enable single mode on twin” parameter, EVD Evolution twin eectively becomes an EVD Evolution with single driver and manages valve A only. In addition, it acquires the main control functions that require more than two probes, such as superheat control with brushless DC compressor (BLDC), superheat control with two temperature probes and all the auxiliary control functions. The following explanations are available in manual +0300005EN; refer to this manual for a complete description.

13.1 Enable single mode on twin

Parameter to be set at the end of the commissioning procedure.

Parameter/Description Def Min Max UoM

SPECIAL Enable single mode on twin 0 0 1 0 = Twin; 1 = Single

Tab. 13.a

13.2 User interface – LED card

The Open B/Close B LEDs ash.

VBAT

EXV connectionPower Suppl

Rela

NO 1

COM 1

4231

GND

V REFS1S2S3S4

DI1

DI2

Analog – Digital Input Network

GND Tx/Rx

EVD evolution

twin

Fig. 13.a

13.3 Connection diagram - superheat control

EVD Evolution Twin works as a single valve driver (on driver A).

VBAT

COMA

NOA

1324

NET

Tx/RxGND

DI1

GND

DI2

VREF

2 AT

24 Vac

230 Vac

35 VA

shield

EVD4

EVD4 service USB adapter

EEV driver

EVDCNV00E0

Analog - Digital Input Network

OPEN A

CLOSE A

OPEN B

CLOSE B

COMB

NOB

1324

TRADRFE240

4 1 2 3

CAREL EXV VALVE A

EVD evolution

twin

Fig. 13.b

Key:

1 green 2 yellow 3 brown

4 white 5 personal computer for conguration 6 USB/tLAN converter 7 adapter 8 ratiometric pressure transducer - evaporation pressure 9 NTC suction temperature 10 digital input 1 congured to enable control 11 free contact (up to 230 Vac) 12 solenoid valve 13 alarm signal

Note:

• connect the valve cable shield to the electrical panel earth;

• the use of the driver for the superheat control requires the use of the

evaporation pressure probe S1 and the suction temperature probe S2, which will be tted after the evaporator, and digital input 1/2 to enable control. As an alternative to digital input 1/2, control can be enabled via remote signal (tLAN, pLAN, RS485). For the positioning of the probes relating to other applications, see the chapter on “Control”;

• inputs S1, S2 are programmable and the connection to the terminals

depends on the setting of the parameters. See the chapters on “Commissioning” and “Functions”;

• pressure probe S1 in the diagram is ratiometric. See the general connection

diagram for the other electronic probes, 4 to 20 mA or combined;

• four probes are needed for superheat control with BLDC compressors, two

to measure the superheat and two to measure the discharge superheat and the discharge temperature.

13.4 Parameters enabled/disabled for control

The following parameters are made available in this mode. Probe S3 is no longer settable as an external 4 to 20 mA signal.

Parameter/Description Def. / UoM CONFIGURATION

Main control … 19 =air-conditioner/chiller with BLDC compressor 20 = superheat control with 2 temperature probes

Multiplexed showcase/ cold room

Auxiliary control 1 = Disabled 2 = High condensing temperature protection on S3 3 = Modulating thermostat on S4 4 = Backup probes on S3 and S4 5, 6, 7= reserved 8 = Subcooling measurement 9 = Reverse high condensing temperature protection on S3

Disabled

Probe S3 … 20 = external signal (4 to 20 mA) (CANNOT BE SELECTED)

Ratiometric:

-1 to 9.3 barg

Variable 1/2 on the display … 11 = Modulating thermostat temperature

Superheat

S1 probe alarm management … Use backup probe S3

Valve in xed position

S2 probe alarm management … Use backup probe S4

Valve in xed position

Auxiliary refrigerant 0 = same as main control;

23=R32 24=HTR01

25= HTR02

26=R23 27 = R1234yf 28 = R1234ze 29 = R455A 30 = R170 31 = R442A 32 = R447A 33 = R448A 34 = R449A 35 = R450A 36 = R452A 37 = R508B 38 = R452B 39 = R513A 40 = R454B 41 = R458A

ENG

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

Parameter/Description Def. / UoM CONFIGURATION PROBES

S3: calibration gain 4 to 20 mA (CANNOT BE SELECTED) 1

CONTROL

Discharge superheat set point 35 Discharge temperature set point 105

SPECIAL

HiTcond: thresh.old 80 HiTcond: integral time 20 Modulating thermostat: set point 0 Modulating thermostat: dierential 0.1 Modulating thermostat: superheat set point oset 0

ALARM CONFIGURATION

High condensing temperature alarm delay (HiTcond) 600

Tab. 13.b

13.5 Programming with the display

Before setting the parameters, switch the display to driver A.

Important: ignore the parameters for driver B.

CONFIGURAZIONE SONDA S1 Raziom., -1/9.3 barg REGOLAZIONE PRINCIPALE banco frigo/cella canalizzati

Fig. 13.c

13.6 Auxiliary refrigerant

In the event of cascade systems comprising a main circuit and a secondary circuit, the auxiliary refrigerant is the refrigerant in the secondary circuit. See the paragraphs “Auxiliary control” and “Reverse high condensing temperature protection (HiTcond) on S3”. The default value 0 sets the same refrigerant as in the main circuit.

Parameter/description Def.

Min Max U.M.

CONFIGURATION Refrigerant:

-1= user dened; 0= same as main control;

23=R32 24=HTR01

25= HTR02

26=R23 27 = R1234yf 28 = R1234ze 29 = R455A 30 = R170 31 = R442A 32 = R447A 33 = R448A 34 = R449A 35 = R450A 36 = R452A 37 = R508B 38 = R452B 39 = R513A 40 = R454B 41 = R458A

R404A - - -

Tab. 13.c

Note:

• for cascade CO2 systems, at the end of the commissioning procedure, also

set the auxiliary refrigerant. See the paragraph on reverse HiTcond;

• if the refrigerant is not among those available for the “Refrigerant”

parameter”:

1. set any refrigerant (e.g. R404);

2. select the model of valve, the pressure probe S1, the type of main control and end the commissioning procedure;

3. enter programming mode and set the type of refrigerant: custom, and the parameters “Dew a…f high/low” and “Bubble a…f high/low” that dene the refrigerant;

4. start control, for example by closing the digital input contact to enable operation.

13.7 S3 e S4 inputs

The auxiliary probe S3 is associated with the high condensing temperature protection or can be used as a backup probe for the main probe S1. If the probe being used is not included in the list, select any 0 to 5 V ratiometric or electronic 4 to 20 mA probe and then manually modify the minimum and maximum measurement in the manufacturer parameters corresponding to the probes.

Important: probes S3 and S4 are shown as NOT USED if the “auxiliary control” parameter is set as “disabled”. I f “auxiliary control” has any other setting, the manufacturer setting for the probe used will be shown, which can be selected according to the type.

Priority of digital inputs

In certain cases the setting of digital inputs 1 and 2 may be the same or alternatively may be incompatible (e.g.: digital input 1 = regulation backup, digital input 2 = regulation security). The problem thus arises to determine which function the driver needs to perform.

Consequently, each type of function is assigned a priority, primary (PRIM) or secondary (SEC), as shown in the table:

DI1/DI2 conguration Type of function

Tab. 13.d

There are four possible cases of digital input congurations with primary or secondary functions.

Function set Function performed by digital input DI1 DI2 PRIM SEC

PRIM PRIM DI1 PRIM SEC DI1 DI2 SEC PRIM DI2 DI1 SEC SEC Regulation backup

(supervisor variable)

DI1

Tab. 13.e

Note that:

• if digital inputs 1 and 2 are set to perform a PRIM function, only the function

set for input 1 is performed;

• if the digital inputs 1 and 2 are set to perform a SEC function, only the SEC

function set for input 1 is performed; the driver will be set to “Regulation backup” with the value of the digital input determined by the “Regulation backup from supervisor” variable.

13.8 Main control – additional functions

The following additional functions are available using probes S3 and S4.

BLDC Control with compressor

Important: this type of control is incompatible with adaptive control

and autotuning.

To be able to use this control function, only available for CAREL valve drivers, the driver must be connected to a CAREL pCO programmable controller running an application able to manage a unit with BLDC scroll compressor. In addition, the compressor must be controlled by the CAREL Power+ “speed drive” (with inverter), specially designed to manage the speed prole required by the compressor operating specications. Two probes are needed for superheat control (PA, TA) plus two probes located downstream of the compressor (PB, TB) for discharge superheat and discharge temperature (TB) control.

Parameter/Description Def.

CONFIGURATION Main control … AC/chiller with BLDC compressor

multiplexed showcase/cold room

Tab. 13.f

ENG

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

TAPA

EVD evolution

POWER + speed drive

RS485

Modbus®

123

Tx/Rx

GND

shield

pCO

GND

shield

Fig. 13.d

Legenda:

CP Compressor V Solenoid valve C Condenser S Liquid gauge L Liquid receiver EV Electronic valve F Dewatering lter E Evaporator TA,TB Temperature probes PA, PB Pressure probes

For information on the wiring see paragraph “General connection diagram”.

To optimise performance of the refrigerant circuit, compressor operation must always be inside a specic area, called the envelope, dened by the compressor manufacturer.

Inviluppo ⁄ Envelope

Temperatura di evaporazione (C°)

Evaporation temperature (C°)

Temperatura di condensazione (C°)

Condensing temperature (C°)

Fig. 13.e

The pCO controller denes the current set point according to the point of operation within the envelope:

• superheat setpoint;

• discharge superheat setpoint;

• discharge temperature setpoint.

Parameter/Description Def. Min. Max. UOM

ADVANCED Superheat setpoint 11 LowSH:

threshold

180(324) K(°F)

Discharge superheat setpoint 35 -40(-72) 180(324) K(°F) Discharge temperature setpoint 105 -60(-76) 200(392) °C(°F)

Tab. 13.g

Note:

this control function is only available CAREL valve drivers; no set point needs

to be congured by the user.

Superheat regulation with 2 temperature probes

The functional diagram is shown below. This type of control must be used with care, due to the lower precision of the temperature probe compared to the probe that measures the saturated evaporation pressure.

Parameter/Description Def.

CONFIGURATION Main control … superheat regulation with 2 temperature probes

multiplexed showcase/cold room

EVD evolution

Fig. 13.f

Key:

CP Compressor V Solenoid valve C Condenser S Liquid gauge L Liquid receiver EV Electronic valve F Dewatering lter E Evaporator T Temperature probe

Parameter/Description Def. Min. Max. U.M.

ADVANCED Superheat setpoint

11 LowSH: soglia 180 (324) K (°F)

PID: proportional gain

15 0 800 -

PID: integral time

150 0 1000 s

PID: derivative time

5 0 800 s

Tab. 13.h

13.9 Auxiliary control

Auxiliary control can be activated at the same time as main control, and uses the probes connected to inputs S3 and/or S4.

Parameter/description Def.

CONFIGURATION Auxiliary control: 1=Disabled; 2=High condensing temperature protection on S3 probe; 3=Modulating thermostat on S4 probe; 4=Backup probes on S3 & S4; 5, 6, 7 = Reserved; 8 = Subcooling measurement; 9 = Reverse high condensing temperature protection on S3

Disabled

Tab. 13.i

For the high condensing temperature protection (only available with superheat control), an additional pressure probe is connected to S3 that measures the condensing pressure. For the modulating thermostat function (only available with superheat control), an additional temperature probe is connected to S4 that measures the temperature on used to perform temperature control (see the corresponding paragraph).

ENG

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

The last option (available if “main control” = 1 to 18) requires the installation of both probes S3 & S4, the rst pressure and the second temperature.

Note: if only one backup probe is tted, under the manufacture parameters, the probe thresholds and alarm management can be set separately.

HITCond protection (high condensing temperature)

The functional diagram is shown below.

EVD evolution

EEV

Fig. 13.g

Key:

CP Compressor EEV Electronic expansion valve C Condenser V Solenoid valve L Liquid receiver E Evaporator F Dewatering lter P Pressure probe (transducer) S Liquid indicator T Temperature probe

For the wiring, see paragraph “General connection diagram”.

As already mentioned, the HITCond protection can only be enabled if the controller measures the condensing pressure/temperature, and responds moderately by closing the valve in the event where the condensing temperature reaches excessive values, to prevent the compressor from shutting down due to high pressure. The condensing pressure probe must be connected to input S3.

Parameter/description Def. Min. Max. UOM

ADVANCED High Tcond threshold 80 -60 (-76) 200 (392) °C (°F) High Tcond integration time 20 0 800 s ALARM CONFIGURATION High condensing temperature alarm timeout (High Tcond) (0= alarm DISABLED)

600 0 18000 s

Tab. 13.j

The integration time is set automatically based on the type of main control.

Note:

• the protector is very useful in units with compressors on board if the air-

cooled condenser is undersized or dirty/malfunctioning in the more critical operating conditions (high outside temperature);

• the protector has no purpose in multiplexed systems (showcases), where

the condensing pressure is maintained constant and the status of the individual electronic valves does not aect the pressure value.

To reduce the condensing temperature, the output of the refrigeration unit needs to be decreased. This can be done by controlled closing of the electronic valve, implying superheat is no longer controlled, and an increase in the superheat temperature. The protector will thus have a moderate reaction that tends to limit the increase in the condensing temperature, keeping it below the activation threshold while trying to stop the superheat from increasing as much as possible. Normal operating conditions will not resume based on the activation of the protector, but rather on the reduction in the outside temperature. The system will therefore remain in the best operating conditions (a little below the threshold) until the environmental conditions

change.

OFF

ALARM

OFF

PID

OFF

MOP

MOP_TH - 1

MOP_TH

T_EVAP

Fig. 13.h

Key:

T_COND Condensing temperature T_COND_TH HiTcond: threshold HiTcond High Tcond protection status HiTcond ALARM Alarm PID PID superheat control t Time D Alarm timeout

Note:

• the High Tcond threshold must be greater than the rated condensing

temperature of the unit and lower then the calibration of the high pressure switch;

• the closing of the valve will be limited if this causes an excessive decrease

in the evaporation temperature.

Modulating thermostat

This function is used, by connecting a temperature probe to input S4, to modulate the opening of the electronic valve so as to limit the lowering of the temperature read and consequently reach the control set point. This is useful in applications such as the multiplexed cabinets to avoid the typical swings in air temperature due to the ON/OFF control (thermostatic) of the solenoid valve. A temperature probe must be connected to input S4, located in a similar position to the one used for the traditional temperature control of the cabinet. In practice, the close the controlled temperature gets to the set point, the more the control function decreases the cooling capacity of the evaporator by closing the expansion valve. By correctly setting the related parameters (see below), a very stable cabinet temperature can be achieved around the set point, without ever closing the solenoid valve. The function is dened by three parameters: set point, dierential and oset.

Parameter/description Def. Min. Max. UOM

ADVANCED Modul. thermost setpoint 0 -60 (-76) 200

(392)

°C (°F)

Modul. thermost dierential 0.1 0.1 (0.2) 100

(180)

°C (°F)

Modul. thermost SHset oset (0= function disabled)

0 0 (0) 100

(180)

K (°R)

Tab. 13.k

The rst two should have values similar to those set on the controller for the cabinet or utility whose temperature is being modulated. The oset, on the other hand, denes the intensity in closing the valve as the temperature decreases: the greater the oset, the more the valve will be modulated. The function is only active in a temperature band between the set point and the set point plus the dierential.

Important: the “Modulating thermostat” function should not be used on stand-alone refrigeration units, but only in centralised systems. In fact, in the former case closing the valve would cause a lowering of the pressure and consequently shut down the compressor.

ENG

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

Examples of operation:

1. oset too low (or function

disabled)

OFF

set point

set point + di

2. oset too high

OFF

set point

set point + di

3. oset correct

OFF

set point

set point + di

Fig. 13.i

Key:

di= dierential SV= solenoid valve (showcase temperature control) S4= temperature

EVD evolution

EEV

Fig. 13.j

Key:

CP Compressor EEV Electronic expansion valve C Condenser V Solenoid valve l Liquid receiver E Evaporator F Dewatering lter P Pressure probe (transducer) S Liquid indicator T Temperature probe

For the wiring, see paragraph “General connection diagram”.

Backup probes on S3 & S4

Important: this type of control is compatible with the “main control”

parameter setting between 1 and 18.

In this case, pressure probe S3 and temperature probe S4 will be used to replace probes S1 and S2 respectively in the event of faults on one or both, so as to guarantee a high level of reliability of the controlled unit.

S2S4S3

EVD evolution

T PT

EEV

Fig. 13.k

Key:

CP Compressor EEV Electronic expansion valve C Condenser V Solenoid valve L Liquid receiver E Evaporator F Dewatering lter P Pressure probe (transducer) S Liquid indicator T Temperature probe

For the wiring, see paragraph “General connection diagram”.

Subcooling measurement

This function measures subcooling using a pressure probe and a temperature probe connected to inputs S3 and S4 respectively. The reading can be sent to a controller connected in the serial network (e.g. pCO).

TAPA

EEV

EVD evolution

S2S1 S4

Fig. 13.l

Key:

CP Compressor EEV Electronic expansion valve C Condenser V Solenoid valve L Liquid receiver E Evaporator F Filter-drier PA, PB Pressure probes S Liquid gauge TA, TB Temperature probes

For the wiring, see paragraph “General connection diagram”

ENG

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

The subcooling measurement uses the dierence between the condensing temperature taken from the relative pressure reading and the temperature of the liquid refrigerant exiting the condenser. This measurement indicates the refrigerant charge in the circuit.

A value near 0 K indicates possible insucient refrigerant, which may cause a decline in circuit cooling eciency, a reduction in mass ow through the expansion valve and swings in superheat control. In addition, it may indicate a refrigerant leak in circuits where the nominal subcooling value is known.

A subcooling value that is too high, for example above 20 K, when not required by the application may indicate excessive refrigerant charge in the circuit, and can cause unusually high condensing pressure values with a consequent decline in circuit cooling eciency and possible compressor shutdown due to the high pressure switch tripping.

Reverse high condensing temperature protection (HiTcond) on S3

The aim of reverse HiTcond protection is to limit the condensing pressure in the refrigerant circuit by opening the valve rather than closing it. This function is recommended, rather than the HiTcond protection function described previously, in refrigerant circuits without a liquid receiver and where the condenser is smaller than the evaporator (e.g. air-to-water heat pumps). In this case, in fact, closing the valve would obstruct the ow of refrigerant to the condenser that, lacking sucient volume for the refrigerant to accumulate, would cause an increase in condensing pressure. This function is especially useful for condensers in CO

cascade systems. See the chapter on Protectors.

EEV

EVD evolution

Fig. 13.m

Key:

CP Compressor EEV Electronic expansion valve C Condenser V Solenoid valve F Filter-drier E Evaporator S Liquid gauge P Pressure probe (transducer) T Temperature probe

For the wiring, see paragraph “General connection diagram”

Important: opening the valve will probably also cause activation of the low superheat protection LowSH, which tends to limit the opening of the valve. The ratio between the integral times of these two concurrent yet opposing protectors determines how eective one is compared to the other.

Reverse HiTcond (for CO2 cascade systems)

Reverse high condensing temperature protection (HiTcond) on S3 is especially useful for condensers in CO

cascade systems, where condensation in the low temperature circuit (also called “secondary”, B) takes place when evaporating the refrigerant in the medium temperature circuit (“primary”, A).

Parameter / Description Def. SPECIAL Refrigerant Alls refrigerants, not R744 Main regulation Subcooling regulation 1...10 Auxiliary refrigerant R744

Tab. 13.l

Nota: for this type of application, the auxiliary refrigerant must be set

as CO

(R744).ù

CHE

EEV

CP1

EVD evolution

S2S1 S4

CP2

Fig. 13.n

Key:

CP1/2 Compressor 1/2 EEV Electronic expansion valve CHE Cascade heat exchanger C Condenser L1/2 Liquid receiver 1/2 V Solenoid valve F1/2 Filter-drier 1/2 E Evaporator S1/2 Liquid gauge 1/2 P1/2 Pressure probe (transducer) T1 Temperature probe V2 Thermostatic expansion valve

For the wiring, see paragraph 2.11 “General connection diagram”

The driver controls refrigerant superheat in the primary circuit (A), and at the same time measures the refrigerant condensing pressure in the secondary circuit (B). When the condensing temperature exceeds the HiTCond protection threshold, normal superheat control is overridden by forced opening of the valve, at a rate that is inversely proportional to the HiTCond protection integral time. Opening the EEV lowers the superheat in the primary circuit, which increases the heat exchange coecient and consequently reduces the condensing pressure in the secondary circuit.

The reverse HiTcond threshold for CO

cascade applications should be set in relation to the expected evaporation temperature in the primary circuit. The threshold must be set to a value that is at least 3-5°C higher than the minimum evaporation temperature in the primary circuit. Lower values make achieving the set pressure limit incompatible with heat exchange eciency. In addition, swings in operation may occur due the attempt to limit low superheat in the primary circuit and the pressure in the secondary circuit at the same time.

13.10 Variables used based on the type of

control

Vedere il manuale cod. +0300005IT.

ENG

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

Note:

CAREL INDUSTRIES HQs

Via dell’Industria, 11 - 35020 Brugine - Padova (Italy) Tel. (+39) 049.9716611 - Fax (+39) 049.9716600 e-mail: carel@carel.com - www.carel.com

Agenzia / Agency:

“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019

Carel EVD Evolution Twin User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual