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User manual - Hydro-Temp

1. with battery G p miasag pesa pass GO Sporlan DANFOSS ALCO VBAT SEI SEH I ETS 1 EXS 6 CAREL EXV uk SER Di I EX78 1 VALVE A 1 I 1 l T l 5 l A 3 mtd 20 i T 20 f 3 I 2 T 21 Hb 4 ka E 4 4 4 iT 21 i 21 I ca ee j OPENA OPENB EVD evolution CIOSEA Loses TWIN N x 6 pco g a 2 5 f 2 3 zi LAN 355 shield a pco lea AN assy shield DS Modbus 7 RS485 shield EVDOOO0TO tLAN version EVD0000T3 tLAN version EVD0000T1 pLAN version EVD0000T4 pLAN version EVD0000T2 RS485 version EVD0000T5 RS485 version pco E B A CVSTDUMORO Key 1 green 21 black 2 yellow 22 blue 3 brown 23 computer for configuration supervision 4 white A Connection to EVBATO0400 EVABAT00500 5 computer for configuration B Connection to ratiometric pressure transducer SPKTOO RO 6 _ USB tLAN converter E Connection to electronic pressure probe SPK 0000 or piezoresistive 7 adapter pressure transducer SPKTO0 C00 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 O ratiometric pressure transducer driver B F
2. Parameter description Def Min Max UOM CONTROL Pre position time 6 0 18000 s Valve opening at start up evaporator valve 50 0 100 capacity ratio Tab 6 i 29 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 e this procedure is used to anticipate the movement and bring the valve significantly closer to the operating position in the phases immediately after the unit starts e if there are problems with liquid return after the refrigeration unit starts or in units that frequently switch on off 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 secon
3. Probe S4 CAREL NTC 1 CAREL NTC 2 CAREL NTC HT high T 3 Combined NTC SPKP T0 Tab 6 c Calibrating pressure probes S1 S3 and temperature probes S2 and S4 offset and gain parameters If needing to be calibrate e the pressure probe S1 and or S3 the offset 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 offset and the gain parameters can be used the latter which modifies the gradient of the line in the field from 4 to 20 mA e the temperature probe S2 and or S4 the offset 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 offset and the gain parameters can be used the latter which modifies the gradient of the line in the field from 0 to 10 Vdc Pea ac 7 gt fot 147 VY Ae A Z A A Fig 6 a Key A offset B gain Parameter description Def Min Max UOM Probes S1 calibration offset 0 60 870 60 870 barg psig 60 60 mA S1 calibration gain 4 to 20 mA 1 20 20 S2 calibration offset 0 20 36 20 3
4. Tab 5 i The activation status of the tuning procedure will be shown on the standard display by the letter T Value opening gt de te T oh Relais Fig 5 d With adaptive control enabled the controller constantly evaluates whether control is sufficiently 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 fine tune superheat control as much as possible over a maximum of 12 hours Note e 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 ineffective 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 ineffective alarm set the value of the main control parameter to one of the first 10 options If required adaptive control can be immediately re e
5. A1 A2 100 0 Fig 5 k Key Fig 5 1 CP_ Compressor EVA _ Electronic valve A GC Gas cooler EEVB Electronic expansion valve B Key E Evaporator IHE Inside heat exchanger EVA Electronic valve A A1_ Valve opening A V1_ Solenoid valve EVB Electronic valve B A2_ Valve opening B For the wiring see paragraph 2 11 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 Coefficient A Tgas cooler 52 Coefficient 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 CO2 coefficient A 33 100 800 Transcritical CO coefficient 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 p 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 m
6. 94 Control alar MS ss 9 5 EEV motor alarm 9 6 LAN error alarm 10 TROUBLESHOOTING 51 11 TECHNICAL SPECIFICATIONS 53 12 APPENDIX VPM VISUAL PARAMETER MANA GER 54 IZ l Installationi area 54 12 2 Programming VPM 12 3 Copying the setup 12 4 Setting the default parameters 12 5 Updating the controller and display firmware EVD Evolution TWIN 0300006EN rel 2 2 19 03 2012 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 fitted with plug in screw terminals Each driver controls refrigerant superheat and optimises the efficiency of the refrigerant circuit guaranteeing maximum flexibility 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 integr
7. DI1 DI2 configuration 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 EVD Evolution TWIN 0300006EN rel 2 2 19 03 2012 28 There are four possible cases of digital input configurations with primary or secondary functions Driver A Driver B Case Function set Function performed by Function performed by digital input digital input DI1_ DI2 PRIM SEC PRIM SEC 1 PRIM PRIM _ DI1 DI2 2 PRIM SEC DI DI2 DII 3 SEC _ PRIM DI2 DI2 DI 4 SEC SEC Regulation DII Regulation DI2 backup driver backup driver A supervisor B supervisor variable variable Note that e 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 digita nput 2 i i 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 digita input DI1 Driver A will also perform the SEC function set on digital inpu DI2 e 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 digita input DI2 Driver B will also perform the SEC function set on digital inpu DI1 if dig
8. Device model A new project can be created making the changes and then connecting later on to transfer the configuration OFFLINE mode Enter at the Service or Manufacturer level e select Device model and enter the corresponding code E_ Seleziona origine Lista Parametri Chiave E2PROM Rs485 connettore posteriore tLAN connettore frontale Modello dispositivo Cerca per famiglia 1 Famiglia MPX Pro Modelo Codice Cerca per codice Codice Fig 12 d go to Configure device the list of parameters will be displayed allowing the changes relating to the application to be made t BELERCKECEERLELL ewer Fig 12 e At the end of configuration to save the project choose the following command used to save the configuration as a file with the hex extension File gt 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 flash EVD Evolution TWIN 0300006EN rel 2 2 19 03 2012 Fig 12 f Note the program On line help can be accessed by pressing F1 12 3 Copying the setup On the Configure device page once the new project has been created to transfer the list of configuration parameters to another controller e read the list of parameters from the source controller with the Read command remove the connector from the service serial port connect
9. 3 Valve in fixed position 4 Use backup probe S3 CANNOT BE SELECTED Valve in fixed position 24 151 CO Probe S2 alarm management No action 2 Forced valve closing 3 Valve in fixed position 4 Use backup probe S4 CANNOT BE SELECTED Valve in fixed position 25 152 CO Probe S3 alarm management No action 2 Forced valve closing 3 Valve in fixed position No action 26 153 CO Probe S4 alarm management No action 2 Forced valve closing 3 Valve in fixed position No action 27 154 CO Unit of measure 1 C K barg 2 F psig C K barg 21 148 CO DI1 configuration 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 85 212 CO Language Italiano English taliano CO PROBES S1 calibration offset 60 870 60 60 870 60 barg psig mA 34 33 CO S1 calibration gain 4 to 20 mA 20 20 36 35 CO Pressure S1 MINIMUM value 20 290 Pressure S1 MAXIMUM value barg psig 32 31 CO Pressure S1 MAXIMUM value 93 Pressure S1 MINIMUM value 200 2900 barg psig 30 29 CO Pressure
10. O Note to exit the guided commissioning procedure press the DOWN button repeatedly and finally confirm that configuration has been completed The guided procedure CANNOT be ended by pressing Esc if the configuration procedure ends with a configuration 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 gt 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 Modbus This parameter is common to both drivers A and B Parameter description Def Min _ Max UOM CONFIGURATION Network addres
11. activated amp LOP configuration already active LOP threshold amp alarm delay para parameter meters OP high evapo MOP protection ALARM flashing Depends on automatic Protection action Check the MOP protection threshold ration tempera activated amp MOP configuration already active amp alarm delay parameters ure parameter Low suction Threshold and de ALAR Depends on automatic o effect Check the threshold and delay emperature lay time exceeded flashing configuration parameters parameter 47 EVD Evolution TWIN 0300006EN rel 2 2 19 03 2012 Type of alarm _ Cause of LED Display Relay Reset Effects on Checks solutions the alarm control EEPROM dama EEPROM for red alarm ALARM flashing Depends on Replace Total shutdown Replace the controller Contact ged operating and or LED configuration controller service unit parameters parameter Contact damaged service EEV motor error Valve motor fault red alarm ALARM flashing Depends on automatic Interruption Check the connections and the con not connected LED configuration dition of the motor Switch controller parameter off and on again LAN error LAN network green ALARM flashing Depends on automatic Control based on Check the network address settings communication ET LED configuration DI1 DI2 error fla
12. 2 2 19 03 2012 42 2 fa 5 x Parameter description Def Min Max UOM 3 m 3 Note O2 ALARM CONFIGURATION C Low superheat alarm delay LowSH 300 0 8000 62 189 0 alarm disabled C Low evaporation temperature alarm delay LOP 300 0 8000 s 63 190 0 alarm disabled C High evaporation temperature alarm delay MOP 600 0 8000 s 64 191 0 alarm disabled C High condensing temperature alarm delay HiTcond 600 0 8000 s 44 171 CANNOT BE SELECTED C_ Low suction temperature alarm threshold 50 60 76 200 392 SCE A 97 96 Low suction temperature alarm delay 300 0 8000 s 65 192 0 alarm disabled VALVE C_ EEV minimum steps 50 0 9999 step 66 193 C_ EEV maximum steps 480 0 9999 step 67 194 C_ EEV closing steps 500 0 9999 step 68 195 C_ EEV rated speed 50 1 2000 step s 69 196 C_ EEV rated current 450 0 800 mA 70 197 C_ EEV holding current 100 0 250 mA 71 198 C_ EEV duty cycle 30 1 100 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 configuration parameters menu with access by manufacturer password the us
13. 3 N 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 ESV E6V E7V Two EXV OK OK E4V85 with all refrigerants NO NO NO connected except for R410A together e E4V95 only with R134a Tab 2 c 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 twin twin2 twin3 Probe S1 0 5 to 7 barg P1 remote remote driver A 0 5 to 7 barg 0 5 to 7 barg Probe 3 remote remote 0 5 to 7 barg P2 driver B 0 5 to 7 barg 0 5 to 7 barg Tab 2 d Key PI 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 cont
14. LAN error 0 0 D 2 1 R a EEPROM damaged 0 0 D 3 2 R E ProbeS 0 0 D 4 3 R Probe S2 0 0 D 5 4 R Probe S3 0 0 D 6 5 R Probe S4 0 0 D 7 6 R EEV motor error 0 0 D 8 7 R Status of relay A 0 0 D 9 8 R E Q LOP low evaporation temperature 0 0 50 49 R wd z MOP high evaporation temperature 0 0 51 50 R S LowSH low superheat 0 0 52 51 R a z HiTcond high condensing temperature 0 0 53 52 R 2 LOP low evaporation temperature 0 0 D 0 9 R 5 MOP high evaporation temperature 0 0 D 1 10 R lt LowSH low superheat 0 0 D 2 11 R Status of digital input DI 0 0 D 4 13 R Status of digital input DI2 0 0 D 5 14 R Guided initial procedure completed 0 0 D 22 21 R W Alarm Adaptive control ineffective 0 0 D 40 39 R Mains power failure 0 0 D 45 44 R Regulation backup from supervisor 0 0 D 46 45 RAN The displayed variable is to be divided by 100 and allows us to appreciate the hundredth of a bar psig EVD Evolution TWIN 0300006EN rel 2 2 19 03 2012 Tab 8 c 44 8 5 Variables accessible via serial driver B Description Default Min Max Type CAREL SVP_ Modbus _ R W Suction temperature 0 60 76 200 392 A 69 68 R Evaporation temperature 0 60 76 200 392 A 70 69 R Evaporation pressure 0 20 290 200 2900 A 71 70 R Hot gas bypass te
15. Probe S2 reading 0 60 870 200 2900 A 2 i R Probe S3 reading 0 20 290 200 2900 A 3 2 R Probe S4 reading 0 60 76 200 392 A 4 3 R Suction temperature 0 60 76 200 392 A 5 4 R Evaporation temperature 0 60 76 200 392 A 6 5 R Evaporation pressure 0 20 290 200 2900 A 7 6 R Hot gas bypass temperature 0 60 76 200 392 A 8 7 R EPR pressure back pressure 0 20 290 200 2900 A 9 8 R Superheat 0 40 72 180 324 A 0 9 R Condensing pressure 0 20 290 200 2900 A 1 0 R Condensing temperature 0 60 76 200 392 A 2 I R Modulating thermostat temperature 0 60 76 200 392 A 3 2 R Hot gas bypass pressure 0 20 290 200 2900 A 4 3 R CO gas cooler outlet pressure 0 20 290 200 2900 A 5 4 R CO gas cooler outlet temperature 0 60 76 200 392 A 6 5 R Valve opening 0 0 100 A 7 6 R CO gas cooler pressure set point 0 20 290 200 2900 A 8 7 R 4 to 20 MA input value S1 4 4 20 A 9 8 R 0 to 10 V input value S2 0 0 10 A 20 9 R Control set point 0 60 870 200 2900 A 21 20 R Controller firmware version 0 0 800 A 25 24 R MOP suction temperature threshold S2 30 60 76 200 392 A 02 01 R W Valve position 0 0 9999 4 31 R Current unit cooling capacity 0 0 00 7 34 R W Adaptive control status 0 0 75 202 R Last tuning result 0 0 8 76 203 R Extended measured probe S1 0 2000 2901 20000 29007 83 210 R Emergency closing speed valve A 150 1 2000 86 213 R W Low suction temperature 0 0 D 1 0 R
16. S2 S3 amp S4 are programmable and the connection to the terminals depends on the setting of the parameters See the chapters on Commissioning and Functions pressure probes S1 amp S2 in the diagram are ratiometric See the general connection diagram for the other electronic probes 4 to 20 mA or combined e 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 controller or a maximum of 30 metres as long as shielded cables are used with minimum cross section of 1 mm connect all the shields to the earth spade connector 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 specified in the chapter Technical specifications 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 specifications 6 the connection cables must have a minimum cross section of 0 5 mm 7 power up
17. 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 A Important after having resolved the problem with the motor it is recommended to switch the controller off 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 LANerror alarm If the connection to the LAN network is offline for more than 6s due to an electrical problem the incorrect configuration of the network addresses or the malfunction of the pCO controller a LAN error alarm will be signalled The LAN error affects the operation of the controller as follows e case 1 unit in standby digital input DI1 DI2 disconnected driver A B wi remain permanently in standby and control will not be able to start case 2 unit in control digital input DI1 DI2 disconnected the driver wi stop control and will go permanently into sta
18. 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 8 6 Fig 3 e 3 5 Programming mode display The parameters can be modified using the front keypad Access differs 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 configuration 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 15 3 press ENTER and enter the password for the Service level 22 starting from the right most figure and confirming each figure with ENTER if the value entered is correct the first modifiable parameter is displayed network address press UP DOWN to select the parameter to be set press ENTER to move to the value of the para
19. 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 significant 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 EVDCNVOOEO connected Only on RS485 Modbus models can installation be managed as described above by computer using the serial port see paragraph 2 6 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 EVDO000T20 EVD evolution twin universal RS485 Modbus EVD0000T21 EVD evolution twin universal RS485 Modbus pack of 10 pes EVD0000730 EVD evolution twin for Carel valves tLAN EVD0000T31_ EVD evolution twin for Carel valves tLAN pa
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21. 212 CO Language Italiano English Italiano CO PROBES S1 calibration offset 60 870 60 60 870 60 barg psig mA 34 33 CO S1 calibration gain 4 to 20 mA 20 20 36 35 CO Pressure S1 MINIMUM value 20 290 Pressure S1 MAXIMUM value barg psig Pressure S1 MAXIMUM value 93 Pressure S1 MINIMUM value 200 2900 barg psig 30 29 CO Pressure S1 MINIMUM alarm value 20 290 Pressure S1 MAXIMUM alarm value barg psig 39 38 CO Pressure S1 MAXIMUM alarm value 9 3 Pressure S1 MINIMUM alarm value 200 2900 barg psig 37 36 CO C S2 calibration offset 20 36 20 20 36 20 C F vol 41 40 CO EVD Evolution TWIN 0300006EN rel 2 2 19 03 2012 36 a x Parameter description Def Min Max UOM 3 m E Note 3 a C_ S2 calibration gain 0 to 10V 1 20 20 A 43 42 CO C Temperature 2 MINIMUM alarm value 50 60 76 Temperature C F A 46 45 CO S2 MAXIMUM alarm value C Temperature 52 MAXIMUM alarm value 105 Temperature 200 392 C F A 44 43 CO S2 MINIMUM alarm value C S3 calibration
22. 4 remote 0 5 to 7 barg 5 remote 0 to 10 barg 6 remote 0 to 18 2 barg 7 remote 0 to 25 barg 8 remote 0 to 30 barg 9 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 A Relay configuration Alarm relay 12 139 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 A Probe S4 CARELNTC 20 147 CAREL NTC 2 CAREL NTC HT high temperature 3 Combined NTC SPKP TO A DI2 Configuration Regulation 10 137 CO Disabled start stop 2 Valve regulation optimization after defrost tLAN RS485 3 Discharged battery alarm management Regulation 4 Valve forced open at 100 backup 5 Regulation start stop pLAN 35 EVD Evolution TWIN 0300006EN rel 2 2 19 03 2012 Parameter description Def Min Max UOM Type CAREL SVP Modbus Note O user 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 0 Condensing pressure 1 Modulating thermostat temperature 2 EPR pressure 3 Hot gas bypass pressure 4 H
23. 9 3 S3_AL_MIN 200 2900 barg value S3_AL_MAX psig Temperature S4 MINIMUM 50 60 76 S4_AL_MAX C F alarm value S4_AL_MIN Temperature S4 MAXIMUM 105 S4_AL_MIN 200 392 C F alarm value S4_AL_MAX Tab 9 c The behaviour of the driver in response to probe alarms can be configured 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 e valve forced to the initial position control stopped Parameter description Def Min Max UOM CONFIGURATION Probe S1 alarm management Valve in fixed position No action 2 Forced valve closing 3 Valve in fixed position 4 Use backup probe S3 CANNOT BE SELECTED Probe S2 alarm management Valve in fixed position No action Forced valve closing Valve in fixed position Use backup probe S4 CANNOT BE SELECTED Probe S3 alarm management No action No action 2 Forced valve closing 3 Valve in fixed position Probe S4 alarm management No action No action 2 Forced valve closing 3 Valve in fixed position CONTROL Valve opening at start up eva 50 0 100 porator valve capacity ratio Tab 9 d 9 4 Control alarms These are alarms that are only activate during control Protector alarms The alar
24. A 29 28 C_ PID proportional gain 5 0 800 A 48 47 C_ PID integral time 50 0 1000 S 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 5 0 800 s A 55 54 3 A LOP protection threshold 50 60 76 MOP protec C F A 52 51 tion threshold LOP protection integral time 0 0 800 9 A 51 50 MOP protection threshold 50 LOP protec 200 392 C F A 54 53 tion threshold 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 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 60 76 200 392 C F A 101 100 SPECIAL A_ HiTcond threshold CANNOT BE SELECTED 80 60 76 200 392 CCR A 58 57 C_ HiTcond integral time CANNOT BE SELECTED 20 0 800 s A 57 56 A_ Modulating thermostat set point CANNOT BE SELECTED 0 60 76 200 392 C CF A 61 60 A_ Modulating thermostat differential CANNOT BE SELECTED 0 1 0 1 0 2 100 180 eC F A 60 59 C_ Mod thermostat SH set point offset CANNOT BE SELECTED 0 0 0 100 180 K F A 59 58 C_ Coefficient A for CO control 33 100 800 A 63 62 C_ Coefficient B for CO control 22 7
25. EVD evolution twin controllers for RS485 Modbus models only Fig 1 c A Important the EVBAT00400 battery module can only be used with 24 Vac power supply EVD Evolution TWIN 0300006EN rel 2 2 19 03 2012 Battery module code EVBAT00400 The EVBAT00400 module is an electronic device made by CAREL which guarantees temporary power supply to the EVDOOOOT driver only one controller can be connected in the event of a sudden power failure It signals the battery discharged or faulty status via an open collector output which can be used by the pCO to generate an alarm message and notify the technical service for preventive maintenance Powered by a 12 V lead backup battery it supplies 12 Vdc to the controller for the time required to completely close the electronic valve being controlled while during normal operation ensures the battery is correctly recharged The battery code EVBAT00500 and the box code EVBATBOX 0 can be purchased separately usage zazena EBVATO0400 EVBATO0500 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 2 INSTALLATION 2 1 DIN rail assembly and dimensions 2 3 Connection diagram superheat control EVD evolution twin fornito con connettori serigrafati per facilitare i collegamenti elettrici Gli schermi dei d
26. fs measurement error 8 fs maximum 7 typical 52 low temperature NTC 10 KQ at 25 C 50T90 C measurement error 1 C in range 50150 C 3 C in range 50T90 C high temperature NTC 50 kQ at 25 C 40T150 C measurement error 1 5 C in range 20T115 C 4 C in range outside of 201115 C Combined NTC 10 KQ at 25 C 40T120 C measurement error 1 C in range 40T50 C 3 C in range 50T90 C 0 to 10V input max 12 V e resolution 0 1 fs measurement error 9 fs maximum 8 typical 53 ratiometric pressure probe 0 to 5 V e 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 u 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 e resolution 0 1 fs measurement error 2 fs maximum 1 typical S4 low temperature NTC 10 KO at 25 C 50T105 C measurement error 1 C in range 50T50 C 3 C in range 50T90 C high temperature NTC 50 KQ 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 KO at 25 C 40T120 C measurement error 1 C in range 40T50 G 3 C in range 50T9
27. of refrigerant parameter Liquid returns to the com pressor 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 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 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 ineffective 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
28. position corresponding to the start of control when the cooling capacity of the controlled unit varies only for pLAN EVD connected to a pCO e stop end of control with the closing of the valve corresponds to the end of temperature control of the refrigeration unit unit OFF e valve motor error recognition see paragraph 9 5 e 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 first a forced closing is performed and then the standby phase starts Parameter description Def Min Max UOM VALVE EEV closing steps 500 0 9999 step Tab 6 9 The valve is closed in the event of power failures with 24 Vac power supply when the EVBAT00400 battery 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 m
29. 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 DII Digital input 1 DI2 Digital input 2 3 Terminal for tLAN pLan RS485 ModBus connection Terminal for tLAN pLan RS485 ModBus connection E Terminal for pLan RS485 ModBus connection aa service serial port remove the cover for access b serial por Tab 2 b Note connect the shield of the two valve cables to the same spade connector e 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 fitted 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 For the positioning of the probes relating to other applications see the chapter on Control EVD Evolution TWIN 0300006EN rel 2 2 19 03 2012 the use of driver B for superheat control requires the use of the evaporation pressure probe 53 and the suction temperature probe S4 which will be fitted 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 For the positioning of the probes relating to other applications see the chapter on Control e inputs S1
30. the controller for 24 Vdc power supply the controller will close the valves n important for 24 Vdc power supply set Power supply mode parameter 1 to start control See par 6 1 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 230 Vac Fig 2 d Case 2 multiple controllers connected in a network powered by different transformers GO not connected to earth Typical application for a series of controllers in different electrical panels 230 Vac 230 Vac Fig 2 e Case 3 multiple controllers connected in a network powered by different transformers with just one earth point Typical application for a series of controllers in different electrical panels EVD Evolution TWIN 0300006EN rel 2 2 19 03 2012 10 DI 230 Vac 230 Vac 230 Vac pco Fig 2 f A Important avoid installing the controller in environments with the following characteristics e relative humidity greater than the 90 or condensing strong vibrations or knocks exposure to continuous water sprays e 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 nea
31. the electrical connections of the cable to the driver Valve stuck open Check if the superheating is always low lt 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 he 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 com pressor 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 or a few minutes Check that the LowSH threshold is greater than the superheat value measured and that the corresponding protection is activated integral time gt Osec If necessary decrease the value of the integral time The superheat temperature measured by he driver does not reach low values but here is still return of liquid to the compres sor rack Set more reactive parameters to bri
32. the threshold again EVD Evolution TWIN 0300006EN rel 2 2 19 03 2012 8 TABLE OF PARAMETERS 8 1 Tableof parameters driver A 2 Sja n Parameter description Def Min Max UOM 3 n 3 Note 5 v 3 Fis CONFIGURATION A Network address pLAN 30 1 207 11 138 CO others 198 R404A L 13 140 z CARELEV 14 141 A Probe SI Ratiometric 16 143 CO 1 to 9 3 barg Ratiometric OUT 0 to 5 V 1 1 to 4 2 barg 2 04 to 9 3 barg 3 1 to 9 3 barg 4 0 to 17 3 barg 5 0 85 to 34 2 barg 6 0 to 34 5 barg 7 0 to 45 barg 21 1 to 12 8 barg 22 0 to 20 7 barg 23 1 86 to 43 0 barg Electronic OUT 4 20 mA 8 0 5 to 7 barg 9 0 to 10 barg 0 0 to 18 2 bar 1 0 to 25 barg 2 0 to 30 barg 3 0 to 44 8 barg 4 remote 0 5 to 7 barg 5 remote 0 to 10 barg 6 remote 0 to 18 2 barg 7 remote 0 to 25 barg 8 remote 0 to 30 barg 9 remote 0 to 44 8 barg 20 4to 20mA external signal EVD Evolution TWIN 0300006EN rel 2 2 19 03 2012 34 6 Regulation backup 7 Regulation security 2 t a 5 x Parameter description Def Min Max UOM 3 m E Note 5 6 A Main control Multiplexed 15 142 1 Multiplexed showcase cold room showcase 2 Showcase cold room with compressor on board cold room 3 P
33. threshold the same as the protector and delay if set to 0 disables the alarm signal Note the alarm signal is independent from the effectiveness 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 affected 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 300 0 18000 s LowSH 0 alarm disabled Tab 7 b EVD Evolution TWIN 0300006EN r
34. wiring see paragraph 2 11 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 60 200 C F 76 _ 392 PID proportional gain 15 0 800 PID integral time 150 0 1000 ls PID derivative time 5 0 800 s Tab 5 0 Another application that exploits this control function uses the connection of two EXV valves together to simulate the effect of a three way valve called reheating To control humidity valve EVB_2 is opened to let the refrigerant flow into exchanger S At the same time the air that flows through evaporator E is cooled and the excess humidity removed yet the temperature is below he set room temperature It then flows through exchanger S which heats it back to the set point reheating In addition if dehumidification 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 hus has less cooling capacity Valves EVA_1 and EVA_2 are also connected ogether
35. 0 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 Vip 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 25160 C don t use EVDIS under 20 C lt 90 RH non condensing Storage conditions 35T60 C don t store EVDIS under 30 C humidity 90 RH non condensing Index of protector P20 Environmental pollution 2 normal Resistance to heat and fire 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 EVD Evolution TWIN 0300006EN rel 2 2 19 03 2012 52 12 APPENDIX VPM VISUAL PARAMETER MANAGER 12 1 Installation On the htt
36. 0400 EVD evolution TWIN 230 Vac rav 35 VA TRADRFE240 2AT Fig 6 b 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 defined 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 A Important this setting excludes activation deactivation of control via the network See the following functions e Regulation backup sif 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 e 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
37. 100 800 A 64 63 C_ Force manual tuning 0 no 1 yes 0 0 1 D 39 38 C Tuning method 0 0 255 79 206 0 to 100 automatic selection 01 to 141 manual selection 42 to 254 not allowed 255 PID parameters model identified C Network settings 2 0 2 bit s 74 201 CO 0 4800 9600 2 19200 A Power supply mode 0 0 1 D 47 46 CO 0 24 Vac 1 24 Vdc 37 EVD Evolution TWIN 0300006EN rel 2 2 19 03 2012 o G 5 Parameter description Def Min Max UOM 3 n E Note 5 S ALARM CONFIGURATION C Low superheat alarm delay LowSH 300 0 8000 S 43 70 0 alarm disabled C Low evaporation temperature alarm delay LOP 300 0 8000 S 41 168 0 alarm disabled C High evaporation temperature alarm delay MOP 600 0 8000 S 42 169 0 alarm disabled C High condensing temperature alarm delay HiTcond 600 0 8000 S 44 171 CANNOT BE SELECTED C_ Low suction temperature alarm threshold 50 60 76 200 392 C PF A 26 25 Low suction temperature alarm delay 300 0 8000 S 9 36 0 alarm disabled VALVE C_ EEV minimum steps 50 0 9999 step 30 157 C EEV maximum steps 480 0 9999 step 31 58 C_ EEV closing steps 500 0 9999 step 36 163 C_ EEV rated speed 50 1 2000 step s 32 159 C_ EEV rated current 450 0 800 mA 33 160 C_ EEV holding current 100 0 2
38. 43 CO Ratiometric OUT 0 to 5 V Electronic OUT 4 20 MA aa 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 0 0 to 18 2 bar 4 0 to 17 3 barg 1 0 to 25 barg 5 0 85 to 34 2 barg 2 0 to 30 barg 6 0 to 34 5 barg 3 0 to 44 8 barg 7 0 to 45 barg 4 remote 0 5 to 7 barg 5 remote 0 to 10 barg 6 remote 0 to 18 2 barg 7 remote 0 to 25 barg 8 remote 0 to 30 barg 9 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 39 EVD Evolution TWIN 0300006EN rel 2 2 19 03 2012 o G 5 Parameter description Def Min Max UOM 3 n E Note 5 e A Main control Multiplexed 56 183 1 Multiplexed showcase cold room showcase 2 Showcase cold room with compressor on board cold room 3 Perturbed showcase cold room 4 Showcase cold room with sub critical CO 5 R404A condenser for sub critical CO2 6 Air conditioner chiller with plate heat exchanger 7 Air conditioner chiller with tube bundle heat exchanger 8 Air conditioner chiller with finned coil heat exchanger 9 Air conditioner chiller with variable cooling capacity 10 Perturbed air conditioner chiller 1 EPR back pressure 2 Hot gas bypass by pressure 3 Hot gas bypass by temperature 4 Transcritical CO gas cooler 5 Analogue positioner 4 to 20 MA 6 Analogue positioner 0 to 10 V 7 Air condi
39. 50 mA 35 162 C_ EEV duty cycle 30 1 100 34 161 C_ Synchronise position in opening 1 0 1 D 20 19 i 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 Integer CO parameter settable from driver A or from driver B EVD Evolution TWIN 0300006EN rel 2 2 19 03 2012 38 8 2 Table of parameters driver B 2 a 85 x Parameter description Def Min Max UOM 2 m s Note 3 die CONFIGURATION A Network address pLAN 30 1 207 11 138 CO altri 198 A Refrigerant R404A 55 182 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 A Valve CAREL E V gt 54 181 1 CAREL E V 2 Alco EX4 3 Alco EX5 4 Alco EX6 5 Alco EX7 6 Alco EX8 330 Hz recommended CAREL 7 Alco EX8 500 Hz specific Alco 8 Sporlan SEI 0 5 11 9 Sporlan SER 1 5 20 0 Sporlan SEI 30 1 Sporlan SEI 50 2 Sporlan SEH 100 3 Sporlan SEH 175 4 Danfoss ETS 12 5 25B 5 Danfoss ETS 50B 6 Danfoss ETS 100B 7 Danfoss ETS 250 8 Danfoss ETS 400 9 two CAREL E V connected together 20 Sporlan SER I G J K 21 Danfoss CCM 10 20 30 22 Danfoss CCM 40 A Probe S1 Ratiometric 16 1
40. 6 C F volt S2 calibration gain 0 to 10V 1 20 20 S3 calibration offset 0 60 870 60 870 barg psig S3 calibration gain 4 to 20 mA 1 20 20 S4 calibration offset 0 20 36 20 36 C F Tab 6 d 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 configuration 5 6 1 7 1 Disabled 2 Valve regulation optimization after defrost 3 Discharged battery alarm mana gement 4 Valve forced open at 100 5 Regulation start stop 6 Regulation backup 7 Regulation security CONTROL Start delay after defrost 10 0 60 min Tab 6 e Valve regulation optimization after defrost the selected digital input tells he driver the current defrost status Defrost active contact closed Access Manufacturer programming mode to set the start delay after defrost his parameter is common to both drivers Discharged battery alarm management this setting can only be selected if he controller power supply is 24 Vac If the selected digital input is connected o 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 EVD Evolution TWIN 0300006EN rel 2 2 19 03 2012 EVBAT00500 EVD Battery module EVBAT0
41. A 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 For the wiring see paragraph 2 11 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 po EVD evolution twin aaa Al 100 0 Fig 5 m Key EVA Electronic valve A A1_ Valve opening A For the wiring see paragraph 2 11 General connection diagram EVD Evolution TWIN 0300006EN rel 2 2 19 03 2012 I O expander for pCO The EVD Evolution twin driver is co
42. Connection to combined pressure temperature probe SPKP00 T0 1_ NTC probe driver B da The maximum length of the connection cable to the EVBAT00400 module 2 digital input 1 configured to enable control driver A 1 is5m 3_ digital input 2 configured to enable control driver B dp The connection cable to the valve motor must be 4 wire shielded AWG 22 4 voltage free contact up to 230 Vac driver B 2 Lmax 10 m or AWG14 Lmax 50 m 5 solenoid valve driver B connect all the shields of the probe cables to the earth spade 3 6 _ alarm signal driver B 7_ voltage free contact up to 230 Vac driver A 8 solenoid valve driver A 9 alarm signal driver A 20 _ red 13 EVD Evolution TWIN 0300006EN rel 2 2 19 03 2012 The user interface consists of 8 LEDs that display the operating status as shown in the table Fig 3 a Key LED On Off Flashing NET Connection active No Communication error connection OPEN A B Opening valve A B Driver A B disabled CLOSE A B Closing valve A B A Active alarm driver A B Tes TO Awaiting completion of the initial configuration Driver A B disabled Controller off Wrong power supply see chap on Alarms Tab 3 a Controller powered 3 1 Assembling the display board accessory The display board once installed is used to perform all the configuration and programming operations on the two drivers I
43. EVD evolution twin Driver for 2 electronic expansion valves he k lt S I TE 1 Ene User manual po PIRLO 1 LEGGI E CONSERVA gt QUESTE ISTRUZIONI lt READ AND SAVE THESE INSTRUCTIONS om NO POWER E amp SIGNAL DI CABLES VA TOGETHER READ CAREFULLY IN THE TEXT Integrated Control Solutions amp Energy Savings 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 affiliates nonetheless cannot guarantee that all the aspects of the product and the software included with the product respond to the requirements of the final application despite the product being developed according to start of the art techniques The customer manufacturer developer or installer of the final equipment accepts all liability and risk relating to the configuration of the product in order to reach the expected results in relation to the specific final installation and or equipment CAREL INDUSTRIES may based on specific agreements acts as a consultant for the successful commissioning of the final unit application however in no case does it accept liability for the correct operation of the final
44. NNECTION DiAGraMM seecseseesesseerenetseeetinetneeinetnetinte 13 3 USER INTERFACE 14 3 1 Assembling the display board accessory 14 3 2 Display and keypad 3 3 Switching between drivers display 3 4 Display mode display 3 5 Programming mode display 4 COMMISSIONING 17 AI Commissioningi Lalla aa 17 4 2 Guided commissioning procedure display 17 4 3 Checks after commissioning 44 Other fUNCtIONS 5 CONTROL 20 5 1 Main control 5 2 Superheat control 5 3 Adaptive control and autotuning 54 Control with Emerson Climate Digital Scroll compressor 23 55 Specialicontiol lia 24 6 FUNCTIONS 28 6 1 Power supply Mode 6 2 Network connection 6 3 Inputs and outputs 64 Control status 65 SPEcialiCOntrolstatus cicariaa i 31 7 PROTECTORS 33 FAV POECI Sienaan 33 8 TABLE OF PARAMETERS 35 8 1 Table of parameters driver A 8 2 Table of parameters driver B 8 3 UNit Of MEASULE i ceecccsssssssscsssssssssssussssssssesssssseesessssssssesssssssessssssssesenee 44 8 4 Variables accessible via serial driver Al 45 8 5 Variables accessible via Serial driver B sss 46 8 6 Variables used based on the type Of Control 47 9 ALARMS 48 9 1 Ala 9 2 Alarm relay configuration 9 3 Probe alar MS 49
45. S1 MINIMUM alarm value 20 290 Pressure S1 MAXIMUM alarm value barg psig 39 38 CO Pressure S1 MAXIMUM alarm value 93 Pressure S1 MINIMUM alarm value 200 2900 barg psig 37 36 CO S2 calibration offset 20 36 20 20 36 20 C F volt A 41 40 CO 41 EVD Evolution TWIN 0300006EN rel 2 2 19 03 2012 o G 5 Parameter description Def Min Max UOM 3 n E Note 3 5 C_ S2 calibration gain 0 to 10V 1 20 20 A 43 42 CO C Temperature S2 MINIMUM alarm value 50 60 76 Temperature C F A 46 45 CO S2 MAXIMUM alarm value C Temperature S2 MAXIMUM alarm value 105 Temperature 200 392 C F A 44 43 CO S2 MINIMUM alarm value C S3 calibration offset 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 barg psig A 33 32 CO MAXIMUM value C Pressure S3 MAXIMUM value 93 Pressure S3 200 2900 barg psig A 31 30 CO MINIMUM value C Pressure 3 MINIMUM alarm value 1 20 290 Pressure S3 barg psig A 40 39 CO MAXIMUM alarm value C Pressure S3 MAXIMUM alarm val
46. TROLLER the first operation to be performed if necessary is to set the network address using the display If a pLAN tLAN or Modbus controller is used connected to a pCO family controller the setup parameters will not need to be set and confirmed 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 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 DI 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 EVD Evolution TWIN 0300006EN rel 2 2 19 03 2012 16 4 COMMISSIONING 4 2 Guided commissioning procedure display After having fitted the display Network ion gt 7 the first parameter is displayed press UP DOWN to modify the network address value press Enter to move to the value of the parameter Configuration Cont ratio etuork addre REFRIGERANT RAGA Valve Carel Ex
47. ake 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 e the refrigeration unit stops operating either when switched off manually e g from the button supervisor or when reaching the control set point e 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 delivering around 25 of the flow rate of refrigerant based on the setting of the valve open in standby parameter In this phase manual positioning can be activated Parameter description Def Min Max UOM CONTROL Valve open in standby 0 0 1 0 disabled valve closed 1 enabled valve open 25 Tab 6 h 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
48. alibration 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 Insufficient 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 off 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
49. ated with a specific CAREL controller via LAN In addition it features adaptive control that can evaluate the effectiveness 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 e a PlantVisorPRO supervisor via RS485 Modbus In this case On Off control is performed via digital input 1 for driver A and via digital input 2 for driver B if suitably configured As well as regulation start stop digital inputs 1 and 2 can be configured for the following e valve regulation optimization after defrost e discharged battery alarm management valve forced open at 100 e regulation backup e regulation security e 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 3 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
50. atic expansion valve EVA Electronic valve A B EVB PA Pressure probe driver A B PB For the wiring see paragraph 2 11 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 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 J0 1000 s PID derivative time 5 0 800 s Tab 5 m 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 flow and decrease the capacity of circuit X Driver A is used for superheat control on circuit Y EVD evolution twin pr ul 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 filter EVB_ Electronic valve B S Liquid indica
51. ayed use UP DOWN to select the required procedure 3 confirm by pressing ENTER 4 the display will prompt for confirmation 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 e 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 A Important e the procedure must be carried out with controller controllers powered e DO NOT remove the display from the controller during the UPLOAD DOWNLOAD RESET procedure e the parameters cannot be downloaded if the source controller and the target controller have incompatible firmware the parameters cannot be copied from driver A to driver B EVD Evolution TWIN 0300006EN rel 2 2 19 03 2012 12 2 10 Display electrical connections display To display the probe and valve electrical connections for drivers A and B enter display mode See paragraph 3 4 2 11 General connection diagram CAREL E V VALVE B EVBAT00500 EVD Battery module EVBAT00400 O 4 230 Vac 24 Vac 2 AT 1 35VA 085 TRADRFE240 a 230 Vac
52. b EVD Evolution TWIN 0300006EN rel 2 2 19 03 2012 48 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 field defined 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 field outside of which the alarm is signalled can be restricted to ensure greater safety of the controlled unit Note e 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 e 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 Probes Pressure S1 MINIMUM alarm 1 20 290 S1_AL_MAX barg value S1_AL_MI psig Pressure S1 MAXIMUM alarm 9 3 S1_AL_MIN 200 2900 barg value S1_AL_MAX psig Temperature S2 MINIMUM 50 60 76 S2_AL_MAX C F alarm value S2_AL_MIN Temperature S2 MAXIMUM 105 S2_AL_MIN 200 392 CPF alarm value S2_AL_MAX Pressure S3 MINIMUM alarm 1 20 290 S3_AL_MAX barg value S3_AL_MIN psig Pressure S3 MAXIMUM alarm
53. cedure 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 modified 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 k 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 qualified CAREL technical personnel only and must not be modified EVD Evolution TWIN 0300006EN rel 2 2 19 03 2012 22 5 4 Control with Emerson Climate Digital Scroll compressor A Important this type of control is incompatible with 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 amplified by normal control of the expansion valve leading to malfunctions Dedicated control ensures greater stability and efficiency 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 ver
54. ck 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 EVDCONO0021 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 e electrical connections by plug in screw terminals e 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 e activation deactivation of control via digital input 1 for driver A and digital input 2 for driver B if suitably configured or remote control via LAN from pCO programmable controller superheat control with protection functions for low superheat LowSH MOP LOP adaptive superheat control e function to optimise superheat control for air conditioning units fitted with Emerson Climate 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 o
55. ck the electrical connections and the operation of the relay Insufficient 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 significantly 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 Ifthe 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 pLAN or tLAN configura tion does not start control and the valve remains closed Check the pLAN tLAN 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 configuration does not start control and the valve remains closed Check the connection of the digital input Check t
56. control resumes so as to overcome this problem During this delay he 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 j A Important if the superheat temperature should fall below the set point control resumes even if the delay has not yet elapsed EVD Evolution TWIN 0300006EN rel 2 2 19 03 2012 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 wi
57. d 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 200 C F threshold 392 MOP protection integral time 20 0 800 s ALARM CONFIGURATION High evaporation temperature 600 JO 18000 s alarm delay MOP 0 alarm disabled Tab 7 d The integral time is set automatically based on the type of main control 33 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 difference between the evaporation temperature and the activation threshold The more the evaporation temperature increases with reference to the MOP threshold the more intensely the val
58. d 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 flow of refrigerant and the effective control phase Control The control request for each driver can be received respectively by the closing of digital input 1 or 2 via the network pLAN The solenoid or the compressor are activated when the valve following the pre positioning procedure has reached the calculated position The following figure 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 emperature of the copper pipes and the air causing excessive opening of he electronic valve for extended periods in which there is return of liquid to he 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 difficult 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
59. damage to things or people downtime or any direct indirect incidental actual punitive exemplary special or consequential damage of any ind whatsoever whether contractual extra contractual or due to negligence or any other liabilities deriving from the installation use or impossibility to use he 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 defined 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 effects 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 wast
60. driver B 0 0 D 48 47 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 integer SVP variable address with CAREL protocol on 485 serial card Modbus variable address with Modbus protocol on 485 serial card 45 EVD Evolution TWIN 0300006EN rel 2 2 19 03 2012 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 nex variable screen press the Esc button to return to the standard display Main control Variable displayed Superheat Transcritical Gas bypass Gas bypass EPR back Analogue I O expander Valve opening control CO temperature pressure pressure positioning for pCO Valve position step Current unit cooling capacity Set point contro
61. e the penalties are specified 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 certified 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 NO POWER CABLES TOGETHER READ CAREFULLY IN THE TEXT EVD Evolution TWIN 0300006EN rel 2 2 19 03 2012 Contents 1 INTRODUCTION 7 Il Modesti 7 1 2 Main functions And features 7 2 INSTALLATION 9 2 1 DIN rail assembly and dimensions sssssessssessssnsesessssnsssiassesssee 9 2 2 Description of the terminals esmsssesseeeessetsesestseiestiesesits 9 2 3 Connection diagram superheat CONtr0l 9 24 Installation 10 2 5 Valve operation in parallel and complementary mode 10 2 6 Shared Pressure PrObe sceessssssssssssssesnesssssusssunessusesnsssussesssse 11 2 7 Connecting the USB tLAN Converter i 11 2 8 Connecting the USB RS485 converter 2 9 Upload Download and Reset parameters display 12 2 10 Display electrical Connections displaV 12 2 11 General CO
62. el 2 2 19 03 2012 32 7 PROTECTORS 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 SH Low_SH_TH Low_SH OFF ON A OFF gt ID B t lt gt 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 specifications 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 fa
63. equipment system The CAREL INDUSTRIES product is a state of the art product whose operation is specified 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 configuration programming commissioning to be able to operate in the best possible way for the specific application The failure to complete such operations which are required indicated in the user manual may cause the final product to malfunction CAREL INDUSTRIES accepts no liability in such cases Only qualified 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 ypes of liquids or condensate contain corrosive minerals that may damage he electronic circuits In any case the product should be used or stored in environments that comply with the temperature and humidity limits specified in the manual e do not install the device in particularly hot environments Too high emperatures may reduce the life of electronic devices damage them and deform or mel
64. er can choose the unit of measure for the driver e international system C K barg e 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 43 EVD Evolution TWIN 0300006EN rel 2 2 19 03 2012 8 4 Variables accessible via serial driver A Description Default Min Max Type CAREL SVP_ Modbus _ R W Probe S1 reading 0 20 290 200 2900 A 1 0 R
65. erature 19 suction If the superheat temperature is high it means that the evaporation process is completed well before the end of the evaporator and therefore flow rate of refrigerant through the valve is insufficient This causes a reduction in cooling efficiency 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 flow rate 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 quantified There is therefore un undetermined risk to the compressor that must be avoided Moreover a high superheat temperature as mentioned corresponds to an insufficient flow 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 Alowsuperheat 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
66. erturbed showcase cold room 4 Showcase cold room with sub critical CO 5 R404A condenser for sub critical CO3 6 Air conditioner chiller with plate heat exchanger 7 Air conditioner chiller with tube bundle heat exchanger 8 Air conditioner chiller with finned coil heat exchanger 9 Air conditioner chiller with variable cooling capacity 0 Perturbed air conditioner chiller EPR back pressure 2 Hot gas bypass by pressure 3 Hot gas bypass by temperature 4 Transcritical CO gas cooler 5 Analogue positioner 4 to 20 MA 6 Analogue positioner 0 to 10 V 7 Air conditioner chiller or showcase cold room with adaptive control 8 Air conditioner chiller with Digital Scroll compressor 9 AC or chiller with SIAM ANB scroll compressor CANNOT BE SELECTED 20 superheat regulation with 2 temperature probes CANNOT BE SELECTED 21 I O expander for pCO parameter common to driver A and driver B A Probe 82 CARELNTC 17 144 CO 1 CAREL NTC 2 CAREL NTC HT hi temp 3 Combined NTC SPKP TO 4 0 to 10 V external signal A Auxiliary control 18 145 CO Disabled NOT MODIFIABLE A Probe S3 Ratiometric 19 146 CO Ratiometric OUT 0 to 5 V Electronic OUT 4 20 mA 1 to 9 3 barg 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 0 0 to 18 2 bar 4 0 to 17 3 barg 1 0 to 25 barg 5 0 85 to 34 2 barg 2 0 to 30 barg 6 0 to 34 5 barg 3 0 to 44 8 barg 7 0 to 45 barg
67. f 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 configured as e alarm relay output See the chapter on Alarms solenoid valve control e electronic expansion valve status signal relay The relay contact is only open ifthe valve is closed opening 0 As soon as control starts opening gt 0 with hysteresis the relay contact is closed Parameter description Def CONFIGURATION Relay configuration 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 Alarm relay Tab 6 f 6 4 Control status The electronic valve controller has 8 different types of control status each of which may correspond to a specific phase in the operation of the refrigeration unit and a certain status of the controller valve system The status may be as follows e forced closing initialisation of the valve position when switching the instrument on e 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 effective control of the electronic valve unit ON positioning step change in the valve
68. hanical problems with the compressor processing residues or moisture in the refrigerant circuit O 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 31 EVD Evolution TWIN 0300006EN rel 2 2 19 03 2012 These are additional functions that are activated in specific 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 e integral time which determines the intensity if set to 0 the protector is disabled set automatically based on the type of main control e alarm with activation
69. hat when the control signal is sent that the input is closed correctly Check that the driver is in stand alone mode Tab 10 a 51 EVD Evolution TWIN 0300006EN rel 2 2 19 03 2012 11 TECHNICAL SPECIFICATIONS Power supply e 24Vac 10 15 to be protected by external 2 A type T fuse Lmax 5 m e 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 reinforced 6 mm in air 8 mm on surface 3750 V insulation other outputs Motor connection 4 wire shielded cable AWG 22 Lmax 10 m or AWG 14 Lmax 50m Digital input connection Digital input to be activated from voltage free contact or transistor to GND Closing current 5 mA Lmax lt 30 m Probes Lmax 10 m S1 ratiometric pressure probe 0 to 5 V with shielded cable e resolution 0 1 fs measurement error 2 fs maximum 1 typical less than 30 m 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 e resolution 0 1 fs measurement error 2 fs maximum 1 typical 4 to 20 MA input max 24 mA resolution 0 5
70. hiller or showcase cold room with adaptive control 8 air conditioner chiller with Digital Scroll compressor 9 AC chiller with SIAM ANB scroll compressor CANNOT BE SELECTED 20 superheat regulation with 2 temperature probes CAN NOT BE SELECTED 21 1 0 expander for pCO only for CAREL valves controls Tab 4 e 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 2 S4 will be automatically set to the values recommended by CAREL based on the selected application During this initial configuration phase only superheat control mode from 1 to 10 can be set which differ based on the application chiller refrigerated cabinet etc In the event of errors in the initial configuration these parameters can later be accessed and modified 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 3 Checks after commissioning After commissioning e check that the valves complete a full closing cycle to perform alignment e 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 t
71. hold 50 LOP protec 200 392 C F A 93 92 tion threshold 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 1 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 60 76 200 392 C F A 101 100 SPECIAL A_ HiTcond threshold CANNOT BE SELECTED 80 60 76 200 392 C F A 58 57 CO C_ HiTcond integral time CANNOT BE SELECTED 20 0 800 s A 57 56 CO A_ Modulating thermostat set point CANNOT BE SELECTED 0 60 76 200 392 Cer A 61 60 CO A_ Modulating thermostat differential CANNOT BE SELECTED 0 1 0 1 0 2 100 180 C F A 60 59 CO C_ Mod thermostat SH set point offset CANNOT BE SELECTED 0 0 0 100 180 K F A 59 58 CO C_ Coefficient A for CO control 33 100 800 A 95 94 C Coefficient B for CO 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 0 255 80 207 0 to 100 automatic selection 101 to 141 manual selection 142 to 254 not allowed 255 PID parameters model identified C Network settings 2 0 2 bit s 74 201 CO 0 4800 1 9600 2 19200 A Power supply mode 0 0 1 D 47 46 CO 0 24 Vac 1 24 Vdc EVD Evolution TWIN 0300006EN rel
72. hresholds LOP MOP etc See the chapter on Protectors 4 4 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 specific characteristics of the unit controlled By entering Manufacturer programming mode finally the operation of the controller can be completely customised setting the function of each parameter If the parameters corresponding to PID control are modified the controller will detect the modification and indicate the main control as Customised EVD Evolution TWIN 0300006EN rel 2 2 19 03 2012 18 5 CONTROL 5 1 Main control EVD evolution twin features two types of control which can be set independently for driver A and B Main control defines the operating mode of the driver The first 10 settings refer to superheat control the others are so called special settings and are pressure or temperature settings or depend on a control signal from an external controller The two last special functions also relate to superheat control Parameter Description Def CONFIGURATION Main control Superheat control 1 multiplexed showcase cold room 2 showcase cold room with compressor on board 3 pert
73. i Prg ee bY POS ED Prg Esc Y press Enter to confirm the value press UP DOWN to move to the next parameter refrigerant for driver A indicated by the letter at the top right repeat steps 2 3 4 5 to modify the values of the parameters for driver A refrigerant valve pressure probe S1 main control check that the probe electrical check that the electrical connections are correct for driver A connections are correct for valve A then set the same parameters for driver B see step 6 set the values of the parameters for driver B refrigerant valve B pressure probe S3 main control check connections are correct for valve B check that the probe electrical that the electrical connections are correct for driver B if the configuration is correct exit the procedure otherwise choose NO and retum to step 2 Configuration End configuration f o ih Prg Esc ter At the end of the configuration 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 configured for each driver network address common parameter refrigerant valve pressure probe type of main control that is the type of unit the superheat control is applied to Urbi
74. in complementary mode controlled by the 4 to 20 mA signal on input S1 from an external regulator EVD Evolution TWIN 0300006EN rel 2 2 19 03 2012 24 EVD evolution twin Key CP Compressor EVA_1 2 Electronic valves connected in EVB_1 2 complementary mode C Condenser H Relative humidity probe VI Solenoid valve TB Temperature probe V3 Non return valve E Evaporator S Heat exchanger v2 Thermostatic expansion valve reheating For the wiring see paragraph 2 11 General connection diagram Transcritical CO gas cooler This solution for the use of CO 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 efficiency of the system Set A T B 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 simplified 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 efficiency Driver B is used for superheat control EVD evolution twin EVD evolution o v s o S
75. ion TWIN 0300006EN rel 2 2 19 03 2012 20 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 IZ LI FI A CPI 5 51 EI MAN ewa PA G E2 EVD evolution EEVA_2 ui FARA sta L2 F2 B cp2 s2 M E3 V2 EEVB_1 Pd TB E4 EEVB_2 Fig 5 Key CP1 2 compressor 1 2 CIE condenser 1 2 E1 E2 E3 E4 evaporator 1 2 3 4 F1 F2 dewatering filter 1 2 51 52 liquid indicator 1 2 EEVA_1 electronic expansion valves driver A EEVA_2 EEVB_1 electronic expansion valves driver B EEVB_2 TA TB temperature probe LI L2 liquid receiver 1 2 V1 V2 solenoid valve 1 2 For the wiring see paragraph 2 11 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 defined by the law u t K e t 2 Je t dt T dele Key u t Valve position Ti Integral time e t Error Td Derivative time K Proportional gain Note that control is calculated as the sum of three separate contributions proportional integral and derivative e the proportional action opens or closes the valve proportionally
76. ion on calibrating PID control O 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 K F point LowSH protection integral time 15 0 800 S LOP protection threshold 50 60 76 MOP C F threshold LOP protection integral time 0 0 800 s OP protection threshold 50 LOP thre 200 392 C F shold OP protection integral time 20 0 800 s Tab 5 h 5 3 Adaptive control and autotuning 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 effectiveness 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 protectio
77. is reset automatically with a fixed differential of 3 C above the activation threshold Relay activation for control alarms As mentioned in the paragraph on the configuration of the relay in the event of LowSH MOP and low suction temperature alarms the driver relay will open both when configured as an alarm relay and configured as a solenoid alarm relay In the event of LOP alarms the driver relay will only open if configured 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 C F shold LOP protection integral time 0 0 800 s MOP protection threshold 50 LOP th 200 392 C F reshold MOP protection integral time 20 0 800 S ALARM CONFIGURATION Low superheat alarm delay LowSH 300 0 18000 s 0 alarm disabled Low evaporation temperature alarm 300 0 18000 S delay LOP 0 alarm disabled High evaporation temperature alarm 600 0 18000 s delay MOP 0 alarm disabled Low suction temperature alarm 50 60 76 200 392 C F hreshold Low suction temperature alarm 300 O 18000 s delay 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
78. ital inputs 1 and 2 are set to perform a SEC function driver A wil 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 1 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 configured for 1 valve regulation optimization after defrost SEC function 2 regulation backup PRIM function With reference to the previous table e 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 e 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 start stop o
79. l 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 CO gas cooler outlet temperature CO gas cooler outlet pressure CO 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 firmware version Display firmware 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 The value of the variable is not displayed Status of digital input 0 open 1 closed Tab 8 e O Note the
80. larm management amp alarm range parameter S1 alarm manage Pressure S1 MINIMUM amp MAXIMUM ment alarm value parameters Probe S2 Probe S2 faulty red alarm ALAR Depends on automatic Depends on Check the probe connections Check or exceeded se LED flashing configuration parameter Probe the Probe S2 alarm management amp alarm range parameter S2 alarm manage Temperature S2 MINIMUM amp MAXI ment UM alarm value parameters Probe S3 Probe S3 faulty red alarm ALAR Depends on automatic Depends on Check the probe connections Check or exceeded se LED flashing configuration parameter Probe the Probe S3 alarm management amp alarm range parameter S3 alarm manage Pressure 53 MINIMUM amp MAXIMUM ment alarm value parameters Probe S4 Probe S4 faulty red alarm ALAR Depends on automatic Depends on Check the probe connections Check or exceeded se LED flashing configuration parameter Probe the Probe S4 alarm management amp alarm range parameter S4 alarm manage Temperature S4 MINIMUM amp MAXI ment MUM alarm value LowSH low LowSH protection ALARM flashing Depends on automatic Protection action Check the LowSH protection thre superheat activated amp LowSH configuration already active shold amp alarm delay parameters parameter LOP low evapora LOP protection ALARM flashing Depends on automatic Protection action Check the Protection ion temperature
81. ler 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 configuration 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 first 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 field 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 CON
82. ll 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 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 EVD Evolution TWIN 0300006EN rel 2 2 19 03 2012 30 ON ON i t ST OFF ON D 7 n I T4 t er Fig 6 e Key A_ Control request R Control S___ Standby T4 Stop position time ST Stop t Time 6 5 Special control status As well as normal control status the driver can have 3 special types of status related to specific 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 Ta o 6 k 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
83. lls 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 MOP protection C F 76 threshold LOP protection integral time O 0 800 S ALARM CONFIGURATION Low evaporation temperature 300 0 18000 Ss alarm delay LOP 0 alarm disabled Tab 7 c The integral time is set automatically based on the type of main control Note e the LOP threshold must be lower then the rated evaporation temperature of the unit otherwise it would be activated unnecessarily and greater than he 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 he two limits indicated e the protector has no purpose in multiplexed systems showcases where he evaporation is kept constant and the status of the individual electronic valve does not affect the pressure value e the LOP alarm can be used as an alarm to highlight refrigerant leaks by he circuit A refrigerant leak in fact causes an abnormal lowering of the evaporation temperature that is proportional in term
84. losed A Probe S4 CARELNTC 20 147 CO CAREL NTC 2 CAREL NTC HT high temperature 3 Combined NTC SPKP TO A DI2 Configuration Regulation 10 137 CO 1 Disabled start stop 2 Valve regulation optimization after defrost tLAN RS485 3 Discharged battery alarm management Regulation 4 Valve forced open at 100 backup 5 Regulation start stop pLAN 6 Regulation backup 7 Regulation security EVD Evolution TWIN 0300006EN rel 2 2 19 03 2012 40 Parameter description Def Min Max UOM Type Modbus Note O user 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 0 Condensing pressure 1 Modulating thermostat temperature 2 EPR pressure 3 Hot gas bypass pressure 4 Hot gas bypass temperature 5 CO gas cooler outlet temperature 6 CO gas cooler outlet pressure 7 CO gas cooler pressure set point 8 Probe S1 reading 9 Probe S2 reading 20 Probe S3 reading 21 Probe S4 reading 22 4 to 20 MA input 23 0 to 10V input CANNOT BE SELECTED Superheat 3 CAREL SVP ee Vai Variable 2 on display see variable 1 on display Valve ope ning 59 186 Probe S1 alarm management No action 2 Forced valve closing
85. ly wi alarm is displayed ist of alarms for driver B he list of alarms for driver A h Power supply mode set to DC no 9 2 Alarm relay configuration 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 configured as e alarm relay during normal operation the relay contact is closed and opens when any alarm is activated It can be used to switch off the compressor and the system in the event of alarms e 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 e 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 flow of refrigerant or switching off the compressor The LOP alarm is excluded as in of low evaporation temperature closing the solenoid valve woul the situation he event d worsen Parameter description Def Relay configuration Alarm 1 Disabled relay 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 Tab 9
86. meter press UP DOWN to modify the value press ENTER to save the new value of the parameter repeat steps 5 6 7 8 to modify the other parameters 0 press Esc to exit the procedure for modifying the Service parameters ai enon A Important 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 e 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 5 if the value entered is correct the list of parameter categories is shown Configuration Probes Control Special Alarm configuration Valve 6 press the UP DOWN buttons to select the category and ENTER to access the first 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 CINDE REGOLAZIONE SPECIAL CONFIG ALLARMI LALLA Fig 3 g A Important all the controller parameters can be modified by entering the Manufacturer level e if when setting a parameter the value entered is out of range this is not accepted and the paramete
87. mperature 0 60 76 200 392 A 74 73 R EPR pressure back pressure 0 20 290 200 2900 A 72 71 R Superheat 0 40 72 180 324 A 68 67 R Hot gas bypass pressure 0 20 290 200 2900 A 73 72 R CO gas cooler outlet pressure 0 20 290 200 2900 A 76 75 R CO gas cooler outlet temperature 0 60 76 200 392 A 75 74 R Valve opening 0 0 100 A 66 65 R CO 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 Control set point 0 60 870 200 2900 A 67 66 R MOP suction temperature threshold 54 30 60 76 200 392 A 103 102 R W Valve position 0 0 9999 49 176 R Current unit cooling capacity 0 0 00 l 50 177 R W Last tuning result 0 0 8 l 78 205 R Adaptive control status 0 0 0 l 77 204 R Emergency closing speed valve B 150 1 2000 l 86 213 R W Extended measured probe S3 0 2000 2901 20000 29007 I 84 201 R Low suction temperature 0 0 D 29 28 R EEV motor error 0 0 D 30 29 R Status of relay B 0 0 D 31 30 R ii Q LOP low evaporation temperature 0 0 54 53 R vw amp MOP high evaporation temperature 0 0 l 55 54 R 5 LowSH low superheat 0 0 56 55 R Y HiTcond high condensing temperature 0 0 57 56 R LOP low evaporation temperature 0 0 D 27 26 R g MOP high evaporation temperature 0 0 D 28 27 R LowSH low superheat 0 0 D 26 25 R lt Driver B disconnected 0 0 D 35 34 R Adaptive control ineffective 0 0 D 42 41 R Regulation backup from supervisor
88. ms 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 defined 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 O Note this is a likely event as during the delay the protection function will have an effect 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 configuration 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 flooding of the compressor with corresponding alarm signal If the alarm delay is set to 0 s the alarm is disabled The alarm
89. n 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 different units applications and valves the theories on stability that adaptive control and autotuning are based on are not always definitive As a consequence the following procedure is suggested in which each successive step is performed if the previous has not given a positive outcome 21 1 use the parameters recommended by CAREL to control the different units based on the values available for the Main control parameter 2 use any parameters tested and calibrated manually based on laboratory or field 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 ineffective 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
90. n procedure depends on the mechanics of the valve When the setting the valve parameter the two synchronisation parameters are automatically defined 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 e mechanical blockage of the solenoid valve upstream of the electronic valve if installed e electrical damage to the solenoid valve upstream of the electronic valve e blockage of the filter upstream of the electronic valve if installed e electrical problems with the electronic valve motor e electrical problems in the driver valve connection cables incorrect driver valve electrical connection e electronic problems with the valve control driver secondary fluid evaporator fan pump malfunction e insufficient refrigerant in the refrigerant circuit e refrigerant leaks e lack of subcooling in the condenser e electrical mec
91. n two different modes system alarm on the main page the ALARM message is displayed flashing 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 Table of alarms Superheating 4 5 E Valve opening 44 Fig 9 b control alarm next to the flashing ALAR the type of protector activated Superheating Valve opening i Prg ec bP OE Fig 9 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 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 e the control alarms can be disabled by setting the corresponding delay to zero Type of alarm _ Cause of LED Display Relay Reset Effects on Checks solutions the alarm control Probe S1 Probe S1 faulty red alarm ALAR Depends on automatic Depends on Check the probe connections Check or exceeded se LED flashing configuration parameter Probe the Probe S1 a
92. nabled using the same parameter If the procedure ends successfully the resulting control parameters will be automatically saved EVD Evolution TWIN 0300006EN rel 2 2 19 03 2012 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 0 1 3 0 no 1 yes Tab 5 j The activation status of the procedure is indicated on the standard display by the message TUN at the top right 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 specific movements of the valve and measurements of the control variables Note e 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 pro
93. ndby case 3 unit in standby digital input DI1 DI2 connected the driver wi remain in standby however control will be able to start if the digital inpu 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 wi remain in control status maintaining the value of the current cooling capacity If the digital input opens the driver will go to standby and contro will be able to start again when the input closes In this case it will start with current cooling capacity 100 EVD Evolution TWIN 0300006EN rel 2 2 19 03 2012 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 offering an initial response for resolving the problem PROBLEM CAUSE SOLUTION The superheat value measu red 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
94. ng 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 first approach decrease by 30 to 50 the proportional factor Subsequently ry 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 nitially 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 EVD Evolution TWIN 0300006EN rel 2 2 19 03 2012 50 PROBLEM CAUSE SOLUTION In the start up phase with high evaporator tempe ratures the evaporation pressure is high MOP protection disabled or ineffective 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
95. ng 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 any showcases defrosting at the same ime 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 significantly oversized Replace the valve with a smaller equivalent Liquid returns to the com pressor 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 effective 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 cor responding to the average of the worki
96. nly available on the controllers for CAREL valves configuration and programming by display accessory by computer using the VPM program or by PlantVisor PlantVisorPro supervisor and pCO programmable controller commissioning simplified by display with guided procedure for setting the parameters and checking the electrical connections e multi language graphic display with help function on various parameters management of different units of measure metric imperial parameters protected by password accessible at a service installer and manufacturer level copy the configuration parameters from one EVD evolution twin controller to another using the removable display e 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 EVBAT00400 EVBAT00500 accessory advanced alarm management For software versions higher than 4 0 the following new functions have been introduced e 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 e use of digital to start stop control when the
97. nnected to the pCO programmable controller via LAN transferring the probe readings quickly and without filtering Each driver operates as a simple actuator and receives the information needed to manage the valves from the pCO Parameter Description Def CONFIGURATION Main control multiplexed showcase cold I room I O expander for pCO Tab 5 q EEVB O EEVA re SS EVD evolution pco e PLAN Frere x4 am shield Fig 5 n Key T_ _ Temperature probe P__ Pressure probe EEV Electronic valve EVD Evolution TWIN 0300006EN rel 2 2 19 03 2012 26 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 0 1 0 24 Vac 1 24 Vdc Tab 6 a A Important with direct current power supply in the event of power failures emergency closing of the valve is not performed even if the EVBAT00400 battery module is connected 6 2 Network connection To connect an RS485 Modbus controller to the network as well as the network address parameter see paragraph 4 2 the communication speed also needs to be set in bit s using the network settings parameter Parameter Descri
98. offset 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 barg psig A 33 32 CO MAXIMUM value C Pressure 53 MAXIMUM value 93 Pressure S3 200 2900 barg psig A 31 30 CO MINIMUM value C Pressure S3 MINIMUM alarm value 1 20 290 Pressure S3 barg psig A 40 39 CO MAXIMUM alarm value C Pressure 53 MAXIMUM alarm value 93 Pressure S3 200 2900 barg psig A 38 37 CO MINIMUM alarm value C_ S4 calibration offset 0 20 36 20 36 C CF A 42 41 CO C Temperature 4 MINIMUM alarm value 50 60 76 Temperature C F A 47 46 CO S4 MAXIMUM alarm value C Temperature 4 MAXIMUM alarm value 105 Temperature 200 392 C F A 45 44 CO S4 MINIMUM alarm value CONTROL A Superheat set point 11 LowSH thre 180 324 K F A 50 49 shold A_ Valve opening at start up evaporator valve capacity ratio 50 0 100 37 164 C Valve open in standby 0 0 1 D 23 22 0 disabled valve closed 1 enabled valve open 25 C Start delay after defrost CANNOT BE SELECTED 0 0 60 min I 40 167 A_ Pre position time 6 0 18000 s 90 217 A_ Hot gas bypass temperature set point 0 60 76 200 392 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
99. ontrol probes S2 and S4 are set as CAREL NTC Other types of probes can be selected in the service menu e unlike the pressure probes the temperature probes do not have any modifiable 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 EVD Evolution TWIN 0300006EN rel 2 2 19 03 2012 Main control Setting the main control defines the operating mode for each driver Parameter description Def CONFIGURATION Main control Superheat control 1 multiplexed showcase cold room multiplexed 2 showcase cold room with compressor on board showcase 3 perturbed showcase cold room 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 finned coil heat exchanger 9 air conditioner chiller with variable cooling capacity 0 perturbed air conditioner chiller Special control 1 EPR back pressure 2 hot gas bypass by pressure 3 hot gas bypass by temperature 4 transcritical CO gas cooler 5 analogue positioner 4 to 20 mA 6 analogue positioner 0 to 10 V 7 air conditioner c
100. ot gas bypass temperature 5 CO gas cooler outlet temperature 6 CO gas cooler outlet pressure 7 CO gas cooler pressure set point 8 Probe S1 reading 9 Probe S2 reading 20 Probe S3 reading 21 Probe S4 reading 22 4 to 20 mA input 23 0 to 10V input CANNOT BE SELECTED Superheat a N N Variable 2 on display see variable 1 on display Valve ope ning 46 173 Probe S1 alarm management 1 No action 2 Forced valve closing 3 Valve in fixed position 4 Use backup probe S3 CANNOT BE SELECTED Valve in fixed position 24 151 CO Probe S2 alarm management 1 No action 2 Forced valve closing 3 Valve in fixed position Use backup probe S4 CANNOT BE SELECTED Valve in fixed position 25 152 CO Probe S3 alarm management 1 No action 2 Forced valve closing 3 Valve in fixed position No action 26 53 CO Probe S4 alarm management 1 No action 2 Forced valve closing 3 Valve in fixed position No action 27 54 CO Unit of measure 1 C K barg 2 F psig C K barg 21 48 CO DI1 configuration 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 85
101. p ksa carel com website under the Parametric Controller Software section select Visual Parameter Manager A window opens allowing 3 files to be downloaded 1 VPM_CD zip for burning to a CD 2 Upgrade setup 3 Full setup the complete program For first 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 first uninstall any previous versions of VPM 12 2 Programming VPM When opening the program the user needs to choose the device being configured 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 first time can be set by the user Fig 12 a Then the user can choose to 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 a p t hie FD Fig 12 b 53 OEM E Dont ask for pasword in the futi Accessible 148 148 100 Fig 12 c 2 select the model from the range and create a new project or choose an existing project select
102. priority over any status protection of the driver Note e 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 configuration 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 VALVE Synchronise valve position in opening 1 0 1 Synchronise valve position in closing 1 0 1 Tab 6 l 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 e realignment is in intrinsic part of the forced closing procedure and is activated whenever the driver is stopped started and in the standby phase e the possibility to enable or disable the synchronisatio
103. protection ineffective 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 Insufficient 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 significantly 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 che
104. ption Def Min Max UOM SPECIAL Network settings 2 0 2 bit s 0 4800 1 9600 2 19200 Tab 6 b Note the following Modbus serial communication parameters cannot be set e byte size 8 bits stop bits 2 e parity none transmission mode RTU 6 3 Inputs and outputs Analogue inputs The parameters in question concern the choice of the type of pressure 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 probes 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 10KQ at 25 C NTCO HP00 50T105 C NTCO WF00 NTCO HF00 CAREL NTC HT HT SOKQ at 25 C NTCO HTOO 0T120 C 150 C for 3000 h Combined NTC SPKP TO 40T120 C A Important for combined NTC probes also select the parameter relating to the corresponding ratiometric pressure probe Parameter description Def CONFIGURATION Probe S2 CAREL NTC 1 CAREL NTC 2 CAREL NTC HT high T 3 Combined NTC SPKP TO 4 0 to 10 V external signal
105. r soon after returns to the previous value e if no button is pressed after 5 min the display automatically returns to the standard mode EVD Evolution TWIN 0300006EN rel 2 2 19 03 2012 4 1 Commissioning Once he 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 se ting 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 e DISPLAY after having correct y configured the setup parameters confirmation will be requested Only after confirmation 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 first 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 control
106. r transmitting antennae exposure of the controller to direct sunlight and to the elements in general A Important When connecting the controller the following warnings must be observed e if the controller is not used as specified in this user manual the protection indicated is not guaranteed do not operate the controller for extended periods without connecting both valves e incorrect connection to the power supply may seriously damage the controller e 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 e 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 e avoid powering the controller directly from the main power supply in the panel if this supplies diff etc which will require a EVD EVO is a control ferent devices s
107. re is no communication with the pCO programmable controller EVD Evolution TWIN 0300006EN rel 2 2 19 03 2012 Series of accessories for EVD evolution twin Display code EVDISOO 0 Easily applicable and removable at any time from the front panel of the controller during normal operation displays all the significant 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 differ in the first settable language the second language for all models is English EVDIS00 0 can be used to configure 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 EVDCNVOOEO 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 configure and program the controller VPM can also be used to update the controller and display firmware See the appendix Fig 1 b USB RS485 converter code CVSTDUMORO The converter is used to connect the configuration computer and the
108. readings of probes S1 S2 S3 S4 is always displayed regardless of whether or not the probe is connected EVD Evolution TWIN 0300006EN rel 2 2 19 03 2012 46 9 ALARMS 9 1 Alarms There are two types of alarms for each driver e 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 configured 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 fitted as shown in the table below O 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 GED EVD evolution MI ED EVD evolution MI O OPEN OPEN OPEN OPEN A B A B CLOSE CLOSE CLOSE CLOSE A B A B bs via bs stra A A TOS Ww T TOR aye 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 i
109. roller nl OPENA OPENB EVDCNVOOEO EVD evolution SIOSEA CLOSEB SOT A TWIN T ila scenes 2 Fig 2 j 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 configure the controller and update the controller and display firmware downloadable from http ksa carel com See the appendix EVD Evolution TWIN 0300006EN rel 2 2 19 03 2012 2 8 Connecting the USB RS485 converter Only on EVD evolution twin RS485 Modbus models can the configuration computer be connected using the USB RS485 converter and the serial port according to the following diagram OPENA OPENB CLOSE A CLOSE B EVD evolution ES y dea E Eb 59 GO GND we shield 2 Fig 2 k Key 1 personal computer for configuration 2 USB RS485 converter Note the serial port can be used for configuration with the VPM program and for updating the controller firmware downloadable from http ksa carel com to save time up to 8 controllers EVD evolution twin can be connected to the computer updating the firmware at the same time each controller must have a different network address 2 9 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 displ
110. s 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 1 R404A Tab 4 b A 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 17 Pressure probes S1 amp S3 Setting the type of pressure probe S1 for driver A and S3 for driver B defines 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 Parameter description Def CONFIGURATION Probe S1 S3 Ratiom Ratiometric OUT 0 to 5V Electronic OUT 4 to 20 MA 1 to 93 1 to 4 2 barg 8 0 5 to 7 barg barg 2 04 to 9 3 barg 9 0 to 10 barg 1 to 9 3 barg 0 0 to 18 2 barg 4 0 to 17 3 barg 5 0 85 to 34 2 barg 6 0 to 34 5 barg 7 0 to 45 barg 1 0 to 25 barg 2 0 to 30 barg 3 0 to 44 8 barg 4 remote 0 5 to 7 barg 5 remote 0 to 10 barg 6 remote 0 to 18 2 barg 7 remote 0 to 25 barg 8 remote 0 to 30 barg 9 remote 0 to 44 8 barg 20 External signal 4 to 20 mA 21 1 to 12 8 barg 22 0
111. s of speed and extent o the amount of refrigerant dispersed A T_EVAP LOP_TH la SE i i 1 l ON i t LOP OFF i 1 1 1 i gt ON i i 1 t A 1 OFF _ LJ 1 1 or San SL l ID B t Fig 7 b Key T_EVAP Evaporation temperature D Alarm delay LOP_TH Low evaporation temperature ALARM Alarm protection threshold 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 specifications 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 an
112. shing parameter LAN network ETLED ALARM flashing Depends on automatic Control based on Check the connections and that the connection error off configuration DI1 DI2 pCO is on and working parameter Display No communi ERROR message o change Replace o effect Check the controller display and connection error cation between controller connectors controller and disply display Driver B Connection error red alarm ALARM flashing Depends on automatic Driver B forced Replace the controller disconnected driver B LEDB configuration closing parameter Driver A no effect Alarms active on Generic error red alarm ALARM flashing o change automatic o effect See list of alarms for driver A driver A 1 driver A LEDA Alarms active on Generic error red alarm ALARM flashing o change automatic o effect See list of alarms for driver B driver B 2 driver B LED B Adaptive control Tuning failed ALARM flashing o change automatic o effect Change Main control parameter ineffective setting Wrong power DC driver power Green Depends on the Change Total shutdown Check the Power supply mode supply mode supply with Po POWER configuration Power sup parameter and power supply wer supply mode LED parameter ply mode parameter setto flashin parameter AC power supply gRed setting alarm LED Tab 9 a 1 Message that appears at the end of the 2 Message that appears at the end of In the event of AC power supp
113. sion 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 1 lt lt C EVD evolution m KSS F __ Os ahs SBS LI V V 7 ui ate E1 EEVB mo E2 Mage Feo pco l a AN En shield ee Fig 5 f Key CP Compressor V Solenoid valve C Condenser S Liquid gauge L Liquid receiver EEV Electronic expansion valve F Dewatering filter E1 E2 Evaporator TA TB_ Temperature probes PA PB Pressure probes For information on the wiring see paragraph 2 11 General connection diagram 5 5 Specialcontrol 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 different showcases that operate at different temperatures showcases for frozen foods meat or dairy The different 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 Key V1 Solenoid valve E1 E2 Evaporator 1 2 V2 Thermost
114. 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 lower the value The driver in pLAN or tLAN configura tion does not start control and the valve remains closed Check the pLAN tLAN 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 configuration 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 ineffective 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 c
115. t displays the operating status the significant 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 configuration 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 fit the display board as shown e the display will come on and if the controller is being commissioned the guided configuration procedure will start o A Important the controller is not activated if the configuration 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 configuration and programming operations on the controller EVD Evolution TWIN 0300006EN rel 2 2 19 03 2012 14 3 USER INTERFACE 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 O Surriscaldam DH e T_ dd E HOP e per tura valvola Fig 3 Key variable 1 on the display driver A B variable 2 on the display driver A B relay status dri
116. t the plastic parts In any case the product should be used or stored in environments that comply with the temperature and humidity limits specified in the manual do not attempt to open the device in any way other than described in the manual e donot 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 e do not use the product for applications other than those specified 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 specifications shown in the manual may be changed without prior warning The liability of CAREL INDUSTRIES in relation to its products is specified in he CAREL INDUSTRIES general contract conditions available on the website www carel com and or by specific agreements with customers specifically o the extent where allowed by applicable legislation in no case will CAREL DUSTRIES its employees or subsidiaries affiliates be liable for any lost earnings or sales losses of data and information costs of replacement goods or services
117. the connector to the service port on the destination controller e write the list of parameters to the destination controller with the Write command A Important the parameters can only be copied between controllers with the same code Different firmware versions may cause compatibility problems 12 4 Setting the default parameters When the program opens e select the model from the range and load the associated list of parameters go to Configure device the list of parameters will be shown with the default settings connect the connector to the service serial port on the destination controller e select Write During the write procedure the LEDs on the converter will flash The controller parameters will now have the default settings 12 5 Updating the controller and display firmware The controller and display firmware 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 firmware can be downloaded from http ksa carel com See the VPM On line help EVD Evolution TWIN 0300006EN rel 2 2 19 03 2012 54 CAREL 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
118. tioner chiller or showcase cold room with adaptive control 8 Air conditioner chiller with Digital Scroll compressor 9 AC or chiller with SIAM ANB scroll compressor CANNOT BE SELECTED 20 superheat regulation with 2 temperature probes CANNOT BE SELECTED 21 I O expander for pCO control only settable on driver A however corresponds to the entire controller A Probe S2 CARELNTC 17 144 CO 1 CAREL NTC 2 CAREL NTC HT hi temp 3 Combined NTC SPKP TO 4 0 to 10V external signal A Auxiliary control 18 145 CO Disabled NOT MODIFIABLE A Probe S3 Ratiometric 19 146 CO Ratiometric OUT 0 to 5 V Electronic OUT 4 20 mA Ro Sara 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 0 0 to 18 2 bar 4 0 to 17 3 barg 1 0 to 25 barg 5 0 85 to 34 2 barg 2 0 to 30 barg 6 0 to 34 5 barg 3 0 to 44 8 barg 7 0 to 45 barg 4 remote 0 5 to 7 barg 5 remote 0 to 10 barg 6 remote 0 to 18 2 barg 7 remote 0 to 25 barg 8 remote 0 to 30 barg 9 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 A Relay configuration Alarm relay 57 184 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 c
119. 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 significantly the valve will essentially remain stationary and the set point cannot be reached e the integral action is linked to time and moves the valve in proportion to he deviation of the superheat value from the set point The greater the deviations the more intense the integral action in addition the lower he 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 e 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 o instant It tends to react to any sudden variations bringing forward he 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 180 324 K F shold PID proportional gain 15 0 800 PID integral time 150 _ 0 1000 s PID derivative time 5 0 800 s Tab 5 g See the EEV system guide 030220810 for further informat
120. to 20 7 barg 23 1 86 to 43 0 barg Tab 4 d A 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 e 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 modification 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 c
121. tor E Evaporator For the wiring see paragraph 2 11 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 20 200 barg 290 2900 psig PID proportional gain 15 0 800 PID integral time 150 0 1000 s PID derivative time 5 0 800 s Tab 5 n 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 EVD Evolution TWIN 0300006EN rel 2 2 19 03 2012 Fig 5 i Key CP Compressor V Solenoid valve C Condenser EEVA Electronic expansion valve A L Liquid receiver EVB_ Electronic valve B Dewatering filter E Evaporator S Liquid indicator PA __ Pressure probe driver A TA TB Temperature probe For the
122. uch as contactors solenoid valves separate transformer o be incorporated in the end equipment do not use for flush mount e DIN VDE 0100 Protective separation between SELV circuit and other circuits must be guaranteed The requirements according to DIN VDE 0100 must be fulfilled To prevent infringement of the protective separation between SELV circuit to other circuits an additional fixing has to be provided near to the terminals This additional fixing 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 and3 2 CAREL valves connected in 2 CAREL valves connected in parallel mode complementary mode CAREL E V e CAREL E V VALVE A_1 VALVE B_1 4 4 CEE E 2 3 l 3 I 1 1 CAREL E V CAREL E V VALVE A_2 HH VALVE B_2 4 4 2 2 zi LI rT LI 1 1 131 aa i 3 Mi
123. ue 93 Pressure S3 200 2900 barg psig A 38 37 CO MINIMUM alarm value C S4 calibration offset 0 20 36 20 36 C PF A 42 41 CO C Temperature S4 MINIMUM alarm value 50 60 76 Temperature CCE A 47 46 CO S4 MAXIMUM alarm value C Temperature S4 MAXIMUM alarm value 105 Temperature 200 392 SEE A 45 44 CO S4 MINIMUM alarm value CONTROL A Superheat set point 11 LowSH thre 180 324 K F A 83 82 shold A_ Valve opening at start up evaporator valve capacity ratio 50 0 100 I 60 187 C Valve open in standby 0 0 1 D 36 35 0 disabled valve closed 1 enabled valve open 25 C Start delay after defrost CANNOT BE SELECTED 0 0 60 min I 40 167 CO A_ Pre position time 6 0 18000 S 90 217 A_ Hot gas bypass temperature set point 0 60 76 200 392 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 5 0 800 A_ 87 86 C_ PID integral time 50 0 1000 S 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 5 0 800 S A 90 89 A LOP protection threshold 50 60 76 MOP protec C F A 91 90 tion threshold C_ LOP protection integral time 0 0 800 S A 92 91 A MOP protection thres
124. ue cavi valvola vanno collegati all unico terminale tipo fast on 110 CAREL E V VALVE B CAREL E V VALVE A shield 45 Fig 2 a 2 2 Description of the terminals as 3 2 E L COMA a lt NOA Power Supply connecti 5 L COMB a lt NOB E 3 2 E V connection B pa ELD EVD evolution So l CLOSE CLOSE A B twin gt NANNNNNNNANNNANAN r Network i Analog Digital Input 28 6 gt naa GND TRX Er 230 Vac 35VA TRADRFE240 Le i EVDCNVOOEO sea amp personal computer for configuration USB tLAN converter ojo BASS amp 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 Fig 2 b Terminal Description G G0 Power supply VBAT Emergency power supply L Functional earth 1 3 2 4 EXV Stepper motor power supply driver A connection A COM A NO A Alarm relay driver A 1 3 2 4 ExV Stepper motor power supply driver B connection B COM B NOB Alarm relay driver B GND Signal ground VREF Power supply to active
125. urbed 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 finned coil heat exchanger 9 air conditioner chiller with variable cooling capacity 0 perturbed air conditioner chiller Special control 1 EPR back pressure 2 hot gas bypass by pressure 3 hot gas bypass by temperature 4 transcritical CO gas cooler 5 analogue positioner 4 to 20 mA 6 analogue positioner 0 to 10 V 7 air conditioner chiller or showcase cold room with adaptive control 8 air conditioner chiller with Digital Scroll compressor 9 AC chiller with SIAM ANB scroll compressor CANNOT BE SELECTED 20 superheat regulation with 2 temperature probes CANNOT BE SELECTED 21 I 0 expander for pCO only for CAREL valve drivers control only settable on driver A however corresponds to the entire controller O Note R404A condensers with subcritical CO refer to superheat control for valves installed in cascading systems where the flow of R404A or other refrigerant in an exchanger acting as the CO condenser needs to be controlled e perturbed cabinet cold room or air conditioner chiller refer to units that momentarily or permanently operate with swinging condensing or evaporation pressure The following paragraphs explain all the t
126. ve will close The integral time indicates the intensity of the action the lower the value the more intense the action T_EVAP 4 MOP_TH MOP_TH 1 ON i t al i MOP on L t PID OFF i gt t ALARM ON l i D t e a 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 A 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 52 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 30 60 72 200 392 C F threshold 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
127. ver A B alarm press HELP protector activated control status current display driver A driver B adaptive control in progress SINIJA Iw N Messages on the display Control status Active protection ON Operation LowSH Low superheat OFF Standby LOP Low evaporation tempe rature POS Positioning MOP High evaporation tempe rature WAIT Wait CLOSE Closing INIT Valve motor error reco gnition procedure TUN Tuning in progress Tab 3 b The valve motor error recognition procedure can be disabled See paragraph 9 5 rend ogee wh ENTER paths the py fom one et ay Tab 3 c Note the variables displayed as standard can be selected by configuring the parameters Variable 1 on display and Variable 2 on display for each driver See the list of parameters lt Prg Esc gt A 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 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
128. 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 as EVD evolution twin il EVD Evolution TWIN 0300006EN rel 2 2 19 03 2012 Key CP1 CP2 compressor 1 2 C1 C2 condenser 1 2 Lil liquid receiver 1 2 F1 F2 dewatering filter 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 2 11 General connection diagram Another application involves superheat control of two evaporators in the same circuit Fig 5 b Key cP compressor C condenser L liquid receiver F dewatering filter 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 2 11 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 EVD Evolut
129. ypes of control that can be set on EVD evolution twin multiplexed showcase cold room Tab 5 f 5 2 Superheat control The primary purpose of the electronic valve is ensure that the flow rate of refrigerant that flows through the nozzle corresponds to the flow 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 Superheat control The parameter that the control of the electronic valve is based on is the superheat temperature which effectively 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 difference 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 Saturated evaporation emp

User manual - Hydro-Temp

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