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User manual - Supercontrols

1. o 3 Parameter description Def Min Max UOM amp m E Note SPECIAL A_ HiTcond threshold CANNOT BE SELECTED 80 60 76 200 392 C CP A 58 57 CO C_ HiTcond integral time CANNOT BE SELECTED 20 0 800 5 A 57 56 CO A Modulating thermostat set point CANNOT BE SELECTED 0 60 76 200 392 C CF A 61 60 CO Modulating thermostat differential CANNOT BE SELECTED 0 1 0 1 0 2 100 180 C CF 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 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 ALARM CONFIGURATION C Low superheat alarm delay LowSH 300 0 8000 S 62 189 0 alarm disabled C Low evaporation temperature alarm delay LOP 300 0 8000 5 63 190 0 alarm disabled C High evaporation temperature alarm delay MOP 600 0 8000 5 64 191 0 alarm disabled C High condensing temperature alarm delay HiTcond 600 0 8000 5
2. 9 check that the probe electrical check that the electrical connections are correct for driver connections are correct for valve A A then set the same parameters for driver B see step 6 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 check that the probe electrical amp check that the electrical communication will commence between the two instruments and the connections are correct for driver connections are correct for valve controller automatically be enabled for control The main screen will B B shown on the display which can then be removed and control will be e if the configuration is correct commence when requested by the pCO controller or digital input DI1 ni exit the procedure otherwise for driver A and DI2 for driver B The pLAN driver is the only one that YES No choose NO and return to step 2 can start control with a signal from the pCO controller over the pLAN If there is no communication between the pCO and the controller
3. after setting a parameter exits without saving the changes 4 4 navigates the screens on the display UP DOWN increases decreases the value ENTER switches from display to parameter programming mode confirms the value and returns to the list of parameters pressed together with HELP switches the display from one driver to the other Tab 3 c o 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 CAREL 3 3 Switching between drivers display 3 1 Programming mode display Procedure press the Help and Enter buttons together Switching when programming the parameters displays the parameters for driver A and driver B on the same screen CONFIGURATI ON PROBE S1 Ratiom 1 9 3 barg MAIN CONTROL display cabinet cold room CONFIGURATION PROBE 51 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 1 Press Esc one or more times to switch to the standard display 2 Select driver A or B to display the corresponding variables see paragraph 3 3 3 press UP D
4. Parameter description Def Min Max UOM Type CAREL SVP Note 7 user Probe 52 1 CAREL NTC 3 Combined NTC SPKP TO 2 CAREL NTC HT hi temp 4 0 to 10V external signal CAREL NTC N Modbus CO Auxiliary control Custom NOT MODIFIABLE 145 CO Probe 53 Ratiometric OUT 0 to 5 V 1 1 to 42 barg 2 0 4 to 9 3 barg 3 1 to 93 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 20 external signal 4 to 20 mA Electronic OUT 4 20 mA 8 0 5 to 7 barg 9 0 to 10 barg 0 0 to 182 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 Ratiometric 1 to 9 3 barg 146 CO 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 Alarm relay 139 Probe S4 1 CAREL NTC 3 Combined NTC SPKP TO 2 CAREL NTC HT high temperature CAREL NTC 20 147 Configuration of DI2 Start valve B signal NOT MODIFIABLE 137 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 pr
5. 0300006EN rel 1 0 15 06 2009 12 CAREL 2 11 General connection diagram CAREL E V VALVEB 230 Vac 24 Vac 2AT 1 E 35VA 585 gt TRADRFE240 230 Vac 35VA v TRADRFE240 EVDCNVOOEO with battery without battery e Sporlan DANFOSS ALCO BAT SEI SEH 1 ETS 11 E f SER Fog I ur OEC CHA EE ii l I A 25 203 1 2 2 L 21 4 4 4 i wH 4 hal 21 ri 21 EE com 7777 aziona panno 1 Sam NOx eds R l 3 I i I 1 lt 6 pCO LL amu ES shield a Gir pco AN shield 2 E Modbus a RS485 shield EVDOOOOTO tLAN version EVD0000T3 tLAN version EVD0000T1 pLAN version EVD0000T4 pLAN version EVD0000T2 RS485 version RS485 version pco n Le CVSTDUMORO Fig 2 k Key 1 green 21 black 2 yellow 22 blue 3 brown 23 computer for configuration supervision 4 white A Connection to EVBAT00400 EVABAT00500 5 computer for configuration B Connection to ratiometric pressure transducer SPKTOO
6. 32 31 CO MAXIMUM value C Pressure S1 MAXIMUM value 93 Pressure S1 200 2900 barg psig A 30 29 CO MINIMUM value C Pressure S1 MINIMUM alarm value 1 20 290 Pressure S1 barg psig A 39 38 CO MAXIMUM alarm value C Pressure S1 MAXIMUM alarm value 93 Pressure S1 200 2900 barg psig A 37 36 CO MINIMUM alarm value C S2 calibration offset 0 20 36 20 120 36 20 C F vol A 41 40 CO C S2 calibration gain 0 to 10V 1 20 20 A 43 42 CO C Temperature 52 MINIMUM alarm value 50 60 76 Temperature C F A 46 45 CO 2 MAXIMUM alarm value C Temperature S2 MAXIMUM alarm value 105 Temperature 200 392 C F A 44 43 CO 2 MINIMUM alarm value C S3 calibration offset 0 60 870 60 870 barg psig A 35 34 CO C 193 calibration gain 4 to 20 mA 1 20 20 A 82 81 CO C Pressure S3 MI UM value 1 20 290 Pressure 3 barg psig A 33 32 CO MAXIMUM value C Pressure S3 MAXIMUM value 93 Pressure 53 200 2900 barg psig A 31 30 CO MINIMUM value C Pressure S3 MINIMUM alarm value 1 20 290 Pressure 53 barg psig A 40 39 CO MAXIMUM alarm value C Pressure S3 MAXIMUM alarm value 93 Pressure 53 200 2900 barg psig A 38 37 CO MINIMUM alarm value C 154 calibration offset 0 20 36 20 36 CF A 42 41 CO C Temperature 54 MINIMUM alarm value 50 60 76 Temperature C F A 47 46 CO 54 MAXIMUM alarm value C Temperature 54 MAXIMUM
7. 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 working values Check for the causes of the swings e g low refrigerant charge and resolve where pos sible If not possible adopt electronic valve control parameters for perturbed systems see paragraph 8 3 The superheat does NOT swing with the valve set in manual control in the position corresponding to the average of the working values As a first approach decrease by 30 to 50 96 the proportional factor Subsequently try increasing the integral time by the same percentage In any case adopt parameter settings recommended for stable systems The superheat set point is too low Increase the superheat set point and check that the swings are reduced or disappear Initially set 13 C then gradually reduce the set point making sure the system does not start swinging again and that the unit temperature reaches the control set point EVD Evolution TWIN 0300006EN rel 1 0 15 06 2009 46 CAREL 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 t
8. 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 5 F Un CO E a CO 20 external signal 4 to 20 mA A Relay configuration Alarm relay 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 A Probe S4 CAREL NTC 1 CAREL NTC 2 CAREL NTC HT high temperature 3 Combined NTC SPKP TO A Configuration of DI2 10 137 Start valve B signal NOT MODIFIABLE C Variable 1 on display Superheat 58 185 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 53 reading 21 Probe 54 reading 22 4 to 20 MA input 23 0 to 10V input CANNOT BE SELECTED 57 184 20 147 CO C Variable 2 on display see variable 1 on
9. A LOP protection threshold 50 60 76 MOP protec C F A 52 51 tion threshold C LOP protection integral time 0 0 800 5 A 51 50 i A OP protection threshold 50 LOP protec 200 392 C CF A 54 53 tion threshold C OP protection integral time 20 0 800 5 A 53 22 A Enable manual valve positioning 0 0 1 D 24 23 A anual valve position 0 0 9999 step I 39 166 EVD Evolution TWIN 0300006EN rel 1 0 15 06 2009 34 CAREL o 3 Parameter description Def Min Max UOM amp m E Note SPECIAL A_ HiTcond threshold CANNOT BE SELECTED 80 60 76 200 392 C CP A 58 57 C_ HiTcond integral time CANNOT BE SELECTED 20 0 800 5 A 57 56 A_ Modulating thermostat set point CANNOT BE SELECTED 0 60 76 200 392 CCP A 61 60 Modulating thermostat differential CANNOT BE SELECTED 0 1 0 1 0 2 100 180 C CF 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 7 100 800 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
10. 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 0300006EN rel 1 0 15 06 2009
11. CAREL SVP Modbus CONFIGURATION A_ Network address 198 207 11 138 CO A Refrigerant R404A 55 182 R22 2 R134a 3 R404A 4 R407C 5 R410A 6 R507A 7 R290 8 R600 9 R600a 0 R717 112 R744 12 R728 3 R1270 14 R417A 15 R422D 6 R413A 17 R422A 18 R423A 9 R407A 20 R427A A Valve CAREL 54 181 CAREL co EX4 co EX5 co EX6 co EX7 co EX8 330 Hz recommended CAREL co EX8 500 Hz specific Alco 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 A Probe S1 Ratiometric 16 143 CO 1 to 9 3 barg A A A A A A 2 3 4 5 6 7 8 Ratiometric OUT 0 to 5 V Electronic OUT 4 20 mA 1 1 to 42 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 20 mA external signal Main control Multiplexed 56 183 1 Multiplexed showcase cold room showcase 2 S
12. EN61000 3 2 EN55014 1 EN55014 2 EN61000 3 3 Tab 11 a EVD Evolution TWIN 0300006EN rel 1 0 15 06 2009 48 CAREL 12 APPENDIX VPM VISUAL PARAMETER MANAGER 12 1 Installation On the http ksa carel com website under the Parametric Controller Software section select Visual Parameter Manager A window opens allowing 3 files to be downloaded 1 VPM CDzip 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 o 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 vet oe ce ene bsi 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
13. RO 6 USBALAN converter C Connection to electronic pressure probe SPK 0000 or piezoresistive 7 adapter pressure transducer SPKTOO COO 8 ratiometric pressure transducer driver A D Connection as positioner 4 to 20 mA input 9 ITC probe driver A E Connection as positioner 0 to 10 Vdc input O ratiometric pressure transducer driver B F Connection to combined pressure temperature probe SPKPOO TO 1 ITC probe driver B 4 The maximum length of the connection cable to the EVBAT00400 module 2 digital input 1 to enable control driver A 1 lis5 m 3 digital input 2 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 4 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 13 EVD Evolution TWIN 0300006EN rel 1 0 15 06 2009 The user interface consists of 8 LEDs that display the operating status as shown in the table UUUUUUUUUUUUUUU ELD EVD evolution I amp OPEN A p o 8 E 7 ANNNNNANNANNNNNNN 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 CL
14. see the paragraph pLAN error alarm this will be able to continue Home oA S control based on the status of the digital inputs The tLAN and RS485 E Modbus controllers can be connected to a pCO controller but only in At the end of the configuration procedure the controller activates the supervisor mode Control can only start when digital input 1 closes for valve motor error recognition procedure displaying INIT on the display driver A and digital input 2 for driver B 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 Vase m 17 EVD Evolution TWIN 0300006EN rel 1 0 15 06 2009 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 ist select any model and end the procedure Then the controller will be enabled for control and it will be possible to enter Ma
15. 44 171 CANNOT BE SELECTED C Low suction temperature alarm threshold 50 60 76 200 392 C CF A 97 96 Low suction temperature alarm delay 300 0 8000 5 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 E D 37 36 C_ Synchronise position in closing 1 0 D 38 37 Tab 8 b 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 8 3 Unit of measure In the configuration parameters menu with access by manufacturer password the user can choose the unit of measure for the driver international system C K barg imperial system F psig oO Note the units of measure Kand Rrelate 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 wi
16. Fig 12 b 5 a oe VPM ap p b Saket unm proton om mi 148 148 100 Ac const par Fig 12 c 2 select the model from the range and create a new project or choose an existing project select Device model A new project can be created making the changes and then connecting later on to transfer the configuration OFFLINE mode Enter at the Service or Manufacturer level select Device model and enter the corresponding code EA M Sederiona anque Lista Paramet Chave ERN Rs485 connettore posteriore connettore Ironie co Modello depositren 1 Cerca pes lamighe Fea Meus Cerca per codes Fig 12 d goto Configure device the list of parameters will be displayed allowing the changes relating to the application to be made Fig 12 e At the end of 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 49 EVD Evolution TWIN 0300006EN rel 1 0 15 06 2009 Fig 12 f o 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 parameter
17. Note E 9 2 C Probe 54 alarm management No action 27 154 CO 1 No action 2 Forced valve closing 3 Valve in fixed position C_ Language Italiano English Italiano CO C Unit of measure 1 C K barg 2 F psig C K barg i E 21 148 CO PROBES C 151 calibration offset 0 60 870 60 60 870 60 barg psig A 34 33 CO mA C S1 calibration gain 4 to 20 mA 1 20 20 A 36 35 CO C Pressure S1 MINIMUM value 1 20 290 Pressure S1 barg psig A 32 31 CO MAXIMUM value C Pressure S1 MAXIMUM value 93 Pressure S1 200 2900 barg psig A 30 29 CO MINIMUM value C Pressure S1 MINIMUM alarm value 1 20 290 Pressure S1 barg psig A 39 38 CO MAXIMUM alarm value C Pressure S1 MAXIMUM alarm value 93 Pressure S1 200 2900 barg psig A 37 36 CO MINIMUM alarm value C S2 calibration offset 0 20 36 20 120 36 20 C F vol A 41 40 CO C S2 calibration gain 0 to 10V 1 20 20 A 43 42 CO C Temperature 52 MINIMUM alarm value 50 60 76 Temperature C F A 46 45 CO 2 MAXIMUM alarm value C Temperature S2 MAXIMUM alarm value 105 Temperature 200 392 C F A 44 43 CO 2 MINIMUM alarm value C S3 calibration offset 0 60 870 60 870 barg psig A 35 34 CO C 193 calibration gain 4 to 20 mA 1 20 20 A 82 81 CO C Pressure S3 MI UM value 1 20 290 Pressure 3 barg psig A 33 32 CO MAXIMUM value C Pressure S3 MAXIMUM va
18. The expansion valve must therefore be controlled with extreme precision and a reaction capacity around the superheat set point which will almost always vary from 3 to 14 K Set point values outside of this range are quite infrequent and relate to special applications Example of superheat control on two independent circuits A and B qa Qc EVD evolution twin 1 1 Fig 5 a Key CP1 CP2 compressor 1 2 Chia condenser 1 2 LI 12 liquid receiver 1 2 F1 F2 dewatering filter 1 2 51 52 liquid indicator 1 2 CAREL EEVA EEVB electronic expansion valve AB Another possibility involves connecting two equal valves operation in V1 V2 solenoid valve 1 2 parallel mode see paragraph 2 5 to the same evaporator This is useful in E1 E2 evaporator 1 2 reverse cycle chiller heat pump applications to improve distribution of PA PB pressure probe the refrigerant in the outdoor coil 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 Fig 5 C condenser Key L liquid receiver F dewatering filter CP1 2 compressor 1 2 S liquid indicator CIC condenser 1 2 EEVA electronic expansion valve A E1 E2 E
19. a series of controllers in different electrical panels 230 Vac 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 1 0 15 06 2009 10 CAREL 230 Vac Fig 2 f A Important avoid installing the controller in environments with the following characteristics relative humidity greater than the 90 or condensing strong vibrations or knocks exposure to continuous water sprays exposure to aggressive and polluting atmospheres e g sulphur and ammonia fumes saline mist smoke to avoid corrosion and or oxidation Strong magnetic and or radio frequency interference avoid installing the appliances near transmitting antennae exposure of the controller to direct sunlight and to the elements in general A Important When connecting the controller the following warnings must be observed donot operate the controller for extended periods without connecting both valves incorrect connection to the power supply may seriously damage the controller use cable ends suitable for the corresponding terminals Loosen each screw and insert the cable ends then tigh
20. alarm value 105 Temperature 200 392 C F A 45 44 CO 54 MINIMUM alarm value CONTROL A Superheat set point 11 LowSH thre 180 324 K CF A 83 82 shold A Valve opening at start up evaporator valve capacity ratio 50 0 100 96 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 Hot gas bypass temperature set point 0 60 76 200 392 C CE A 84 83 Hot gas bypass pressure set point 3 20 290 200 2900 barg psig A 85 84 x A EPR pressure set point 35 20 290 200 2900 barg psig A 86 85 C 1 proportional gain 5 0 800 i A 87 86 C_ PID integral time 50 0 1000 5 61 188 C PID derivative time 5 0 800 5 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 5 A 90 89 A LOP protection threshold 50 60 76 MOP protec C F A 9 90 tion threshold C LOP protection integral time 0 0 800 5 A 92 91 A OP protection threshold 50 LOP protec 200 392 C CF A 93 92 tion threshold OP protection integral time 20 0 800 5 A 94 93 A Enable manual valve positioning 0 0 1 D 32 31 A anual valve position 0 0 9999 step _ 53 180 EVD Evolution TWIN 0300006EN rel 1 0 15 06 2009 38 CAREL
21. blockage of the solenoid valve upstream of the electronic valve if installed electrical damage to the solenoid valve upstream of the electronic valve blockage of the filter upstream of the electronic valve if installed electrical problems with the electronic valve motor electrical problems in the driver valve connection cables incorrect driver valve electrical connection electronic problems with the valve control driver secondary fluid evaporator fan pump malfunction insufficient refrigerant in the refrigerant circuit refrigerant leaks lack of subcooling in the condenser electrical mechanical problems with the compressor processing residues or moisture in the refrigerant circuit Note the valve unblock procedure is nonetheless performed in each of these cases given that it does not cause mechanical or control problems Therefore also check these possible causes before replacing the valve EVD Evolution TWIN 0300006EN rel 1 0 15 06 2009 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
22. 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 EBVATO0400 EVBAT00500 Fig 1 d EVD Evolution TWIN 0300006EN rel 1 0 15 06 2009 CAREL Valve cable E2VCABS 00 IP67 Shielded cable with built in connector for connection to the valve motor The connector code E2VCONO0000 IP65 can also be purchased on its own to be wired Fig 1 e CAREL 2 INSTALLATION 2 1 DIN rail assembly and dimensions Terminal for tLAN pLan R 485 ModBus connection EVD evolution twin fornito con connettori serigrafati per facilitare i Terminal for pLan RS485 ModBus connection collegamenti elettrici Gli schermi dei due cavi valvola vanno collegati aa service serial port remove the cover for access b serial port all unico terminale tipo fast on Tab 2 a 2 3 Connection diagram superheat control CAREL E V
23. correct operation of the final 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 do not install the device in particularly hot environments Too high emperatures may reduce the life of electronic devices
24. damage them and deform or melt the plastic parts In any case the product should be used or stored in environments that comply with the temperature and humidity imits specified in the manual do not attempt to open the device in any way other than described in the manual donotdrop hit or shake the device as the internal circuits and mechanisms may be irreparably damaged do not use corrosive chemicals solvents or aggressive detergents to clean the device do not use the product for applications other than those 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
25. for example normal control that is less reactive yet much faster in responding when exceeding the activation limits of one of the protectors 7 1 Protectors There are 3 protectors LowSH low superheat LOP low evaporation temperature MOP high evaporation temperature The protectors have the following main features activation threshold depending on the operating conditions of the controlled unit this is set in Service programming mode integral time which determines the intensity if set to 0 the protector is disabled set automatically based on the type of main control alarm with activation threshold the same as the protector and delay if set to 0 disables the alarm signal o 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 3 Reaction summary description of the type of action in controlling the valve Reset summary description of the type of
26. liquid in any operating conditions Stator broken or connected incorrectly Disconnect the stator from the valve and the cable and measure the resistance of the windings using an ordinary tester The resistance of both should be around 36 ohms Otherwise replace the stator Finally check the electrical connections of the cable to the driver Valve stuck open Check if the superheating is always low 2 C with the valve position permanently at 0 steps If so set the valve to manual control and close it completely If the superheat is always low check the electrical connections and or replace the valve The valve opening at start up parameter is too high on many showcases in which 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 Increase the value of the valve control delay after defrosting parameter mpxPRO only 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 corresp
27. positioning Manual positioning can be activated at any time during the standby or control phase Manual positioning once enabled is used to freely set the position of the valve using the corresponding parameter Parameter Description Def Min jMax _ UOM CONTROL Enable manual valve positioning 0 0 1 Manual valve position 0 0 9999 step Tab 6 h Control is placed on hold all the system and control alarms are enabled however neither control nor the protectors can be activated Manual positioning thus has priority over any status protection of the driver Note the manual positioning status is NOT saved when restarting after a power failure in for any reason the valve needs to be kept stationary after a power failure proceed as follows remove the valve stator in Manufacturer programming mode under the configuration parameters set the PID proportional gain 0 The valve will remain stopped at the initial opening position set by corresponding parameter 29 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 i 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 estimate
28. 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 falls below the low evaporation temperature threshold the system enters LOP status and is the intensity with which the valve is opened is increased The further the temperature falls below the threshold the more intensely the valve will open The integral time indicates the intensity of the action the lower the value the more intense the action Parameter description Def Min Max UOM CONTROL LOP protection threshold 50 60 MOP protection C CF 76 threshold LOP protection integral time 0 0 800 S ALARM CONFIGURATION Low evaporation temperature 300 0 18000 S alarm delay LOP 0 alarm disabled Tab 7 c The integral time is set automatically based on the type of main control o Note the LOP threshold must be lower then the rated evaporation temperature of the unit other
29. 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 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 5 41 168 0 alarm disabled C High evaporation temperature alarm delay MOP 600 0 8000 5 42 169 0 alarm disabled C High condensing temperature alarm delay HiTcond 600 0 8000 5 44 171 CANNOT BE SELECTED C suction temperature alarm threshold 50 60 76 200 392 C CE A 26 25 Low suction temperature alarm delay 300 0 8000 5 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 5 C EEV rated speed 50 1 2000 step s 32 159 7 C EEV rated current 450 0 800 mA 33 160 C EEV holding current 100 0 250 mA 35 162 C EEV duty cycle 30 1 100 34 161 C Synchronise position in opening 1 0 1 z D 20 19 E 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 35 EVD Evolution TWIN 0300006EN rel 1 0 15 06 2009 CAREL 8 2 Table of parameters driver B Parameter description Def Min Max UOM Note user
30. valve If the superheat remains high check the electrical connections and or replace the valve The showcase does not reach the set temperature despite the value being opened to the maximum for multiplexed showcases only Solenoid blocked Check that the solenoid opens correctly check the electrical connections and the operation of the relay 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 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 ap
31. 0 0 1000 Js PID derivative time 5 0 800 5 Tab 5 j 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 the 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 2 must open to bypass at least some of the refrigerant to condenser C The refrigerant that reaches the evaporator thus has less cooling capacity Valves EVA 1 and EVA 2 are also connected together in complementary mode controlled by the 4 to 20 mA signal on input 51 from an external regulator CAREL EVD evolution twin Key CP Compressor EVA 1 2 Electronic valves connected in EVB 1 2 complementary mode C Condenser H96 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
32. 0 5 to 7 barg 0 5 to 7 barg Tab 2 c Key P1 shared pressure probe P2 pressure probe 2 7 Connecting the USB tLAN converter Procedure remove the LED board cover by pressing on the fastening points plug the adapter into the service serial port connect the adapter to the converter and then this in turn to the computer power up the controller NET OPENA OPENB CLOSEA CLOSEB Te EVD evolution TWIN TR Network a OG GND ww Fig 2 i Key 1 service serial port 2 adapter 3 USB tLAN converter 4 personal computer o 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 1 0 15 06 2009 CAREL 2 8 Connecting the USB RS485 converter 2 10 Display electrical connections display Only on EVD evolution twin RS485 Modbus models can the configuration To display the probe and valve electrical connections for drivers A and B computer be connected using the USB RS485 converter and the serial enter display mode See paragraph 3 4 port according to the following diagram OPENA OPENB CLOSEA CLOSEB EVD evolution Fig 2 j Key personal computer for configuration 2 USB R
33. 3 E4 evaporator 1 2 3 4 EEVB electronic expansion valve B F1 F2 dewatering filter 1 2 E1 E2 evaporator 1 2 S1 2 liquid indicator 1 2 l PA PB pressure probe driver A B EEVA_1 electronic expansion valves driver A TA TB temperature probe driver A B EEVA 2 i V solenoid valve EEVB 1 electronic expansion valves driver B EEVB 2 TA TB temperature probe For the wiring see paragraph 2 11 General connection diagram cl Squid receiver o Nota in this example only one electronic pressure transducer with For the wiring see paragraph 2 11 General connection diagram 4 to 20 mA output SPK 0000 can be used shared between driver A and B Ratiometric transducers cannot be shared 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 w K et 2 fedt T Z Key u t Valve position Ti Integral time e t Error Td Derivative time K Proportional gain 21 EVD Evolution TWIN 0300006EN rel 1 0 15 06 2009 Note that control is calculated as the sum of three separate contributions proportional integral and derivative the proportional action opens or closes the valve proportionally to the variation in the superheat temperature Thus the greater the K proportional gain the higher the response speed of the valve The proportional action does
34. 4 AL MAX Tab 9 h The behaviour ofthe 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 valve forced to the initial position control stopped Parameter description Def Min Max UOM CONFIGURATION Probe S1 alarm management No action 2 Forced valve closing 3 Valve in fixed position 4 Use backup probe 53 CANNOT BE SELECTED Probe S2 alarm management No action Forced valve closing 3 Valve in fixed position 4 Use backup probe S4 CANNOT BE SELECTED Probe 3 alarm management No action Forced valve closing 3 Valve in fixed position Probe S4 alarm management No action 2 Forced valve closing 3 Valve in fixed position CONTROL Valve opening at start up eva 50 0 porator valve capacity ratio Valve in fixed position Valve in fixed position N No action N Il No action 100 Tab 9 i 9 4 Control alarms These are alarms that are only activate during control Protector alarms The alarms corresponding to the LowSH LOP and MOP protectors are only activated during control when the corresponding activation threshold is exceeded and only when the delay time defined by the corresponding
35. 5 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 20T115 C Combined NTC 10 KQ at 25 C 40T120 C measurement error 1 C in range 40T50 G 3 C in range 50T90 C Relay output normally open contact 5 A 250 Vac resistive load 2 A 250 Vac inductive load PF 0 4 Lmax 50 m UL 250 Vac 5 A resistive 1A FLA 6A LRA pilot duty D300 30000 cycles Power supply to active probes Vi 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 10T60 C 9096 RH non condensing Storage conditions 20170 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 Type of relay action 1C microswitching Insulation class 2 Software class and structure A Conformity Electrical safety EN 60730 1 EN 61010 1 UL873 Electromagnetic compatibility EN 61000 6 1 EN 61000 6 2 EN 61000 6 3 EN 61000 6 4
36. CAREL E V VALVE B VALVE A 45 OMNE pa A 5 a b uri n 1 a I LL la Q_ 9 b 5 l evolution NET ED Sy aan Nae DEBE OPENA OPENB Q UN 2AT gu n CLOSEA CLOSEB TRADRFE240 i twl n A 3 2 4 E connecti il y e 3 2 84 E resi EVDCNVOOEO E V connection BJ Relay MICE ee sia Se M S m EB EVD evolution ts etess geyen E t Fig 2 c Key 1 green aaaaaaaaaaaaaad 2 yellow Analog Digital Input Network 3 brown sal E 4 4 white 5 personal computer for configuration 6 USB tLAN converter Y ratiometric pressure transducer evaporation pressure driver A 8 NTC suction temperature driver A Fig 2 5 9 ratiometric pressure transducer evaporation pressure driver B O NIC suction temperature driver B Terminal Description 1 digital input 1 to enable control driver A G GO Power supply 2 digital input 2 to enable control driver B VBAT Emergency power supply 3 voltage free contact driver A up to 230 V L Functional earth 4 solenoid valve A T 5 alarm signal A 1324 ExV Stepper motor power supply driver A 6 voltage free contact driver B up to 230 V connection A 7 solenoid valve B COM A NO A Alarm relay driver A 8 alarm signal B 1 3 2 4 ExV Stepper motor power supply driver B connection B COM B NO B Alarm relay driver B Note GND Signal ground connect the shield of the two valve cables to the same spade VREF Power supply to active probes connect
37. D digital I integer SVP variable address with CAREL protocol on 485 serial card Modbus variable address with Modbus protocol on 485 serial card 8 6 Variables used based on the type of control The table below shows the variables used by the drivers depending on the Main control parameter At the end of the variable list are the screens used to check the probe and valve electrical connections for driver A and driver B These variables are visible on the display by accessing display mode see paragraph 3 4 and via serial connection with VPM PlantVisorPRO see paragraphs 8 4 8 5 Procedure for showing the variables on the display press the Help and Enter buttons together to select driver A or B press the UP DOWN button press the DOWN button to move to the next variable screen press the Esc button to return to the standard display Main control Variable displayed Superheat Transcritical Gas bypass Gas bypass EPR back Analogue control CO temperature pressure pressure positioning Valve opening 96 Valve position step Current unit cooling capacity Set point control Superheat Suction temperature Evaporation temperature Evaporation pressure Condensing temperature Condensing pressure odulating 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
38. EPR pressure set point 3 5 20 290 200 2900 barg psig PID proportional gain 15 0 800 PID integral time 150 0 1000 5 PID derivative time 5 0 800 5 Tab 5 h EVD Evolution TWIN 0300006EN rel 1 0 15 06 2009 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 Solenoid valve Thermostatic expansion valve P Compressor VI C C Condenser v2 L Liquid receiver F S EEVA Electronic expansion valve A Dewatering filter EVB Electronic valve B Liquid indicator 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 53 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 prop
39. EVD evolution twin CAR F L Driver for 2 electronic expansion valves e po dE yel A FI PILA dt User manual LEGGI E CONSERVA gt QUESTE ISTRUZIONI READ AND SAVE THESE INSTRUCTIONS wal POWER amp SIGNAL CABLES LAJ TOGETHER READ CAREFULLY IN THE TEXT Integrated Control Solutions amp Energy Savings CAREL 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 10096 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
40. OSE A B Closing valve A B US Awaiting completion of the initial configuration Driver A B disabled Active alarm driver A B Controller powered Controller off Tab 3 3 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 It 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 fitthe display board as shown the display will come on and if the controller is being commissioned the guided configuration procedure will start press Fig 3 b 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 1 0 15 06 2009 14 CAREL 3 USER INTERFACE 3 2 Display and keypad The gra
41. OWN the display shows a graph of the superheat the percentage of valve opening the evaporation pressure and temperature and the suction temperature variables 4 press UP DOWN the variables are shown on the display followed by the screens with the probe and valve motor electrical connections 5 press Esc to exit display mode For the complete list of variables used according to the type of control see paragraph 8 6 15 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 3 press ENTER and enter the password for the Service level 22 starting from the right most figure and confirming each figure with ENTER 4 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
42. S485 converter o 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 tosave 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 displayed use UP DOWN to select the required procedure 3 confirm by pressing ENTER the display will prompt for confirmation press ENTER 5 atthe end a message will be shown to notify the operation if the operation was successful UPLOAD the display saves all the values of the parameters on the source controller DOWNLOAD the display copies all the values of the parameters to the target controller RESET all the parameters on the controller are restored to the default values Seethe table of parameters in chapter 8 B A Important the procedure must be carried out with controller controllers powered DO NOT remove the display from the controller during the UPLOAD DOWNLOAD RESET procedure the parameters cannot be downloaded if the source controller and the target controller have incompatible firmware the parameters cannot be copied from driver A to driver B EVD Evolution TWIN
43. T Superheatin VC ABION Valve opening Relais Esc 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 o Note during the optimisation phase maintenance of the superheat set point is not guaranteed however the safety of the unit is ensured through activation of the protectors If these are activated the procedure is interrupted if all the attempts performed over 12 hours are unsuccessful the adaptive control 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 enabled using the same parameter If the procedure ends successfully the resulting control parameters will be automatically s
44. arg 9 0 to 10 barg 3 1 to 9 3 barg 0 0 to 182 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 1 i 141 1 1 1 Oo 143 CO 20 4 to 20 mA external signal Main control Multiplexed 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 CO 6 Air conditioner chiller with plate heat exchanger 7 hir 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 11 EPR back pressure 12 Hot gas bypass by pressure 13 Hot gas bypass by temperature 14 Transcritical CO gas cooler 15 Analogue positioner 4 to 20 mA 16 Analogue positioner 0 to 10 V 17 Air conditioner chiller or showcase cold room with adaptive control 18 Air conditioner chiller with Digital Scroll compressor only controllers for CAREL valves 1 1 1 Un 142 EVD Evolution TWIN 0300006EN rel 1 0 15 06 2009 32 CAREL
45. at is visible in display mode Control is direct as the pressure increases the valve opens Parameter Description Def Min Max UOM SPECIAL Transcritical CO coefficient A 33 100 1800 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 5 Tab 5 k Analogue positioner 4 to 20 mA This control function is available for driver A and driver B Valve A will be positioned linearly depending on the value of the 4 to 20 mA input for analogue valve positioning read by input S1 Valve B will be positioned linearly depending on the value of the 4 to 20 MA input for analogue valve positioning read by input 53 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 EVD Evolution TWIN 0300006EN rel 1 0 15 06 2009 ni a E 2 9 3 EVD evolution twin EVD evolution O A1 A2 100 0 Fig 5 k Key EVA Electronic valve A A1 Valve opening A EVB Electronic valve B A2 Va
46. ate 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 10KO at 25 C ITCO HP00 50T105 C TCO WFOO ITCO HF00 CAREL NTC HT HT 50KO 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 O to 10 V external signal Probe S4 CAREL NTC 1 CAREL NTC 22 CAREL NTC HT high T 32 Combined NTC SPKP TO Tab 6 b Calibrating pressure probes S1 53 and temperature probes S2 and S4 offset and gain parameters If needing to be calibrate 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 4to 20 mA signal coming from an external controller o
47. ation 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 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 ELD EVD evolution MI O ED EVD evolution MI OPEN OPEN OPEN OPEN A B A B CLOSE CLOSE CLOSE A A B VUE bs x twin twin gt TOS n PAP fa Fig 9 a o Note the alarm LED comes on to signal a mains power failure only if the EVBAT module accessory has been connected guaranteeing the power required to close the valve The display shows both types of alarms in two 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 Table of alarms CAREL 9 ALARMS where the alarm occurred A B The same alarm may occur on both drivers e g probe alar
48. ation temperature 600 10 18000 s alarm delay MOP 0 alarm disabled Tab 7 4 The integral time is set automatically based on the type of main control When the evaporation temperature rises above the MOP threshold the system enters MOP status superheat control is interrupted to allow the pressure to be controlled and the valve closes slowly trying to limit the evaporation temperature As the action is integral it depends directly on the 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 valve will close 31 The integral time indicates the intensity of the action the lower the value the more intense the action T EVAP A MOP_TH 1 ON re i I OFF I 1 Li l ON 1 MOP i t PID OFF t ALARM l ON l iL D t e a Fig 7 c Key T_EVAP Evaporation temperature 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 A Important if the closing of the valve also causes an excessive incr
49. aved CAREL 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 S 0 no 1 yes Tab 5 e The activation status of the procedure is indicated on the standard display by the message TUN at the top right TUN Superheating 4 9 K NB Valve opening Relais 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 oO Note during the function maintenance of the superheat set point is not guaranteed however the safety of the unit is ensured through activation of the protectors If these are activated the procedure is interrupted if due to external disturbance or in the case of particularly unstable Systems the procedure cannot suitably optimise the parameters the controller will continue using the parameters saved in the memory before the procedure was started If the procedure ends successfully he resulting control parameters will be automatically saved both the tuning procedure and adaptive control can only be enabled for superheat control they cannot be used for the special control func
50. be position is correct Check that the minimum and maximum pressure parameters for the pressure transducer set on the driver correspond to the range of the pressure probe installed Check the correct probe electrical connections The type of refrigerant set is incorrect Check and correct the type of refrigerant parameter Liquid returns to the 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
51. commissioning After commissioning check that the valves complete a full closing cycle to perform alignment set if necessary in Service or Manufacturer programming mode the superheat set point otherwise keep the value recommended by CAREL based on the application and the protection thresholds LOP MOP etc See the chapter on Protectors 4 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 19 EVD Evolution TWIN 0300006EN rel 1 0 15 06 2009 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 ofthe 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 co
52. commu NET LED No message o change automatic o effect Check the network address settings RS485 Modbus nication error ashing EVD Connection error NETLED No message o change automatic o effect Check the connections and that the off pCO is on and working 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 LED B configuration closing parameter Driver A no effect Alarms active on Generic error red alarm ALARM flashing No change automatic o effect See list of alarms for driver A driver A 1 driver A LED A Alarms active on Generic error red alarm ALARM flashing No change automatic o effect See list of alarms for driver B driver B 2 driver B LEDB Adaptive control Tuning failed ALARM flashing No change automatic o effect Change Main control parameter ineffective setting Tab 9 f 1 Message that appears at the end of the list of alarms for driver B 2 Message that appears at the end of the list of alarms for driver A r 9 2 Alarm relay configuration N The relay contacts are open when the controller is not powered 9 During normal operation the relay can be disabled and thus will be always open or configured as B alarm relay during normal opera
53. cooler pressure set point Probe S1 reading Probe S2 reading Probe 53 reading Probe 54 reading 4to 20 mA input value 0 to 10V 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 Tab 8 e The value of the variable is not displayed Status of digital input 0 open 1 closed Note the readings of probes S1 S2 S3 S4 is always displayed regardless of whether or not the probe is connected 41 EVD Evolution TWIN 0300006EN rel 1 0 15 06 2009 9 1 Alarms There are two types of alarms for each driver System valve motor EEPROM probe and communication control low superheat LOP MOP low suction temperature The activ
54. d Download and Reset parameters display 12 2 10 Display electrical connections display x l2 2 1 General connection diagram ts 13 3 USERINTERFACE 14 31 Assembling the display board 65 14 32 Display and keypad 14 3 3 Switching between drivers display 3 15 3 4 Display mode display 15 4 COMMISSIONING 17 AN COMMISSIONE e y 4 Guided commissioning procedure display 7 4 5 Checks after commissioning 19 44 Other functions eerte tiet 19 5 CONTROL 20 53 Mai iai 20 5 Superheat control ttt 20 5 3 Adaptive control and autotuning e 22 54 Control with Digital Scroll compressor 23 55 dt pa 23 6 FUNCTIONS 27 6 1 Network connection 27 62 Inputs and OUIDUES tinti 27 tad tits 27 64 Speclal cofitrol 29 7 PROTECTORS 30 Ecce 30 8 TABLE OF PARAMETERS 32 8 1 Table of parameters driver A 82 Table of parameters driver B 84 Variables accessible via serial driver A 40 8 5 Variables accessible via serial driver 40 8 6 Variables used based on the type of control 4 9 ALARMS 42 91 Alarms scott entente ee d 42 92 Alarm relay c
55. d to ensure greater Note if configured as an alarm relay to send the alarm signal to a safety of the controlled unit remote device siren light connect a relay to the output according to N ote the following diagram cae the alarm limits can also be set outside of the range of measurement o avoid unwanted probe alarms In this case the correct operation of he unit or the correct signalling of alarms will not be guaranteed by default after having selected the type of probe used the alarm imits will be automatically set to the limits corresponding to the range of measurement of the probe 43 EVD Evolution TWIN 0300006EN rel 1 0 15 06 2009 Parameter description Def Min Max UOM Probes Pressure 1 MINIMUM alarm 1 20 290 51 AL MAX barg value 51 AL MIN psig Pressure 1 MAXIMUM alarm 19 3 S1 AL 200 2900 barg value 51 AL MAX psig Temperature 52 IMUM 50 1 60 76 52 AL MAX C F alarm value S2 AL MIN Temperature 52 MAXIMUM 105 S2 AL 200 392 alarm value 52 AL MAX Pressure 3 MINIMUM alarm 1 20 290 3 AL MAX barg value 3 AL M psig Pressure 53 MAXIMUM alarm 19 3 S3 AL 200 2900 barg value 53_AL_MAX psig Temperature S4 IMUM 50 1 60 76 4 AL MAX C F alarm value 54 AL MIN Temperature 54 MAXIMUM 105 S4 AL 200 392 C alarm value 5
56. d 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 oO Note realignment is in intrinsic part of the forced closing procedure and is activated whenever the driver is stopped started and in the standby phase the possibility to enable or disable the synchronisation procedure depends on the mechanics of the valve When the setting the valve parameter the two synchronisation parameters are automatically 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 mechanical
57. display Valve ope 59 186 ning C Probe S1 alarm management Valve in fixed No action position 2 Forced valve closing 3 Valve in fixed position 4 Use backup probe S3 CANNOT BE SELECTED 24 151 CO C Probe S2 alarm management Valve in fixed 25 152 CO action position Forced valve closing 3 Valve in fixed position 4 Use backup probe S4 CANNOT BE SELECTED N Il C Probe 53 alarm management No action No action 2 Forced valve closing 3 Valve in fixed position 26 153 CO 37 EVD Evolution TWIN 0300006EN rel 1 0 15 06 2009 CAREL Qa e 5 Parameter description Def Min Max UOM amp m 3 Note E 9 2 C Probe 54 alarm management No action 27 154 CO 1 No action 2 Forced valve closing 3 Valve in fixed position C_ Language Italiano English Italiano CO C Unit of measure 1 C K barg 2 F psig C K barg i E 21 148 CO PROBES C 151 calibration offset 0 60 870 60 60 870 60 barg psig A 34 33 CO mA C S1 calibration gain 4 to 20 mA 1 20 20 A 36 35 CO C Pressure S1 MINIMUM value 1 20 290 Pressure S1 barg psig A
58. e integral time MOP high evaporation temperature integral time EVD Evolution TWIN 0300006EN rel 1 0 15 06 2009 CAREL 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 1 usethe 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 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 e Adaptive control After having completed the commissioning procedure to activate adaptive control set the parameter Main control air conditioner chiller or showcase cold room with adaptive control Parameter Description Def CONFIGURATION Main control multiplexed showcase cold room air conditioner chiller or showcase cold room with adaptive control Tab 5 d The activation status of the tuning procedure will be shown on the standard display by the letter
59. ease in the suction temperature S2 S4 the valve will be stopped to prevent overheating the compressor windings awaiting a reduction in the refrigerant charge At the end of the MOP protection function superheat control restarts in a controlled manner to prevent the evaporation temperature from exceeding the threshold again EVD Evolution TWIN 0300006EN rel 1 0 15 06 2009 CAREL 8 TABLE OF PARAMETERS 8 1 Table of parameters driver A Parameter description Def Min Max UOM Note user CAREL SVP Modbus CONFIGURATION A Network address 198 1 207 11 138 CO A Refrigerant R404A 13 140 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 A Valve CAREL 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 10 Sporlan SEI 30 11 Sporlan SEI 50 12 Sporlan SEH 100 13 Sporlan SEH 175 14 Danfoss ETS 12 5 25B 15 Danfoss ETS 50B 16 Danfoss ETS 100B 17 Danfoss ETS 250 18 Danfoss ETS 400 19 two CAREL E V connected together 20 Sporlan SER IG J K A Probe S1 Ratiometric Ratiometric OUT 0 to 5 V Electronic OUT 4 20 mA 1 to 93 barg 1 1 to 4 2 barg 8 0 5 to 7 barg 2 04 to 9 3 b
60. erheat 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 1 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 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 51 4 4 20 A 9 8 R 0 to 10V input value 52 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 Valve position 0 0 9999 4 31 R Current unit cooling capacity 0 0 00 7 34 RAW Adaptive control status 0 0 75 202 R Last tuning result 0 0 8 76 203 R Tuning method 0 0 255 79 206 RAW Low suction temperature 0 0 D 1 0 R LAN error 0 0 D 2 1 R x EEPROM damaged 0 0 D 3 2 R E Probe S 0 0 D 4 3 R 2 Probe 52 0 0 D 5 4 R Probe 53 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 LOP low evaporation temperature 0 0 D 10 9 R OP high evaporation temperature 0 0 D 11 10 R lt LowSH low superheat 0 0 D 12 11 R Status of digital input DI1 0 0 D 14 13 R Status of digital input DI2 0 0 D 15 14 R Enable EVD control 0 0 D 22 21 RAN Alam Adaptive control ineffective 0 0 D 40 39 R Tab 8 c 8 5 Variables accessible via serial drive
61. essure 9 Condensing temperature 0 Condensing pressure 2 EPR pressure 3 Hot gas bypass pressure 8 Probe S1 reading 9 Probe S2 reading 20 Probe 53 reading 21 Probe S4 reading 22 4 to 20 mA input 23 0 to 10V input CANNOT BE SELECTED 4 Hot gas bypass temperature 5 CO gas cooler outlet temperature 6 CO gas cooler outlet pressure 7 CO gas cooler pressure set point 1 Modulating thermostat temperature Superheat 45 172 Variable 2 on display see variable 1 on display Valve ope ning 46 173 Probe 1 alarm management No action 2 Forced valve closing 3 Valve in fixed position 4 Use backup probe 53 CANNOT BE SELECTED Valve in fixed position 24 151 CO Probe S2 alarm management 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 33 EVD Evolution TWIN 0300006EN rel 1 0 15 06 2009 CAREL Qa e 5 Parameter description Def Min Max UOM amp m 3
62. etween 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 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
63. f electrical and electronic waste 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 1 0 15 06 2009 CAREL Contents 1 INTRODUCTION 7 TI 2 7 12 Functions and main 7 2 INSTALLATION 21 DIN rail assembly and 9 22 Description of the terminals 9 2 5 Connection diagram superheat control 9 DA Installation 10 2 5 Valve operation in parallel and complementary mode 10 2 6 Shared pressure probe ttes 11 2 7 Connecting the USB tLAN 11 2 8 Connecting the USB RS485 converter M 2 9 Uploa
64. he required saturated eva poration temperature high evaporation temperature limit for the compressors and setting the MOP integral time to a value above 0 recommended 4 seconds To make the protection more reactive decrease the MOP integral time Refrigerant charge excessive for the system or extreme transitory conditions at start up for showcases only Apply a soft start technique activating the utilities one at a time or in small groups If this is not possible decrease the values of the MOP thresholds on all the utilities In the start up phase the low pressure protection is activated only for units with compressor on board The Valve opening at start up parameter is set too low Check the calculation in reference to the ratio between the rated cooling capacity of the evaporator and the capacity of the valve if necessary 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 pro
65. her electronic probes 4 to 20 mA or combined the pressure probes 51 and 53 must be of the same type 2 4 Installation For installation proceed as follows with reference to the wiring diagrams 1 connectthe 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 power up the controller program the controller if necessary see the chapter User interface 7 connect the serial network if featured follow to the diagrams below for the earth connection D Case 1 multiple controllers connected in a network powered by the same transformer Typica panel application for a series of controllers inside the same electrica 230 Vac pc Fig 2 4 Case 2 multiple controllers connected in a network powered by different transformers GO not connected to earth Typical application for
66. howcase 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 CO 6 Air conditioner chiller with plate heat exchanger 7 hir conditioner chiller with tube bundle heat exchanger 8 Air conditioner chiller with finned coil heat exchanger 9 Air conditioner chiller with variable cooling capacity O 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 conditioner chiller or showcase cold room with adaptive control 8 Air conditioner chiller with Digital Scroll compressor Only controllers for CAREL valves A Probe S2 CAREL NTC CAREL NTC 2 CAREL NTC HT hi temp 3 Combined NTC SPKP TO 4 0 to 10V external signal 1 1 1 N 144 CO EVD Evolution TWIN 0300006EN rel 1 0 15 06 2009 36 CAREL Note Parameter description Def Min Max UOM Type CAREL SVP Modbus 7 user Auxiliary control Custom NOT MODIFIABLE A Probe S3 Ratiometric 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
67. ing 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 control probes 52 and S4 are set as CAREL NTC Other types of probes can be selected in the service menu unlike the pressure probes the temperature probes do not have any 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 CAREL 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 chil
68. 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 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 Fig 5 j Key CP Compressor EVA Electronic valve A GC Gas cooler EEVB Electronic expansion valve B E Evaporator IHE Inside heat exchanger VI Solenoid valve 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 52 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 th
69. is single Types of interfaces DISPLAY after having correctly configured the setup parameters confirmation will be requested Only after confirmation will the After having fitted the display controller be enabled for operation the main screen will be shown on the first parameter is displayed press UP DOWN to modify the the display and control will be able to commence when requested by network address value the pCO controller via pLAN or when digital input DI1 closes for driver 6 press Enter to move to the value A and DI for driver B See paragraph 4 2 of the parameter 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 Network gel ess 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 controller via pLAN or when i Prg onm y digital input DI1 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 canbelimitedt
70. ity this will always be considered as operating at 100 and therefore the procedure will never be used In this case the PID control must be more reactive see the chapter on Control so as to react promptly to variations in load that are not communicated to the driver OFF i ON ol S OFF ON l t NP OFF t es s OFF I 1 Wot t e a Fig 6 n 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 CAREL ON all orr ON t ST OFF 1 Lu i t 1 T4 t lt gt Fig 6 0 Key A___ Control request R Control S Standby T4 Stop position time ST Stop t Time 6 4 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 Manual
71. l 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 5 LOP protection threshold 50 60 76 MOP thre C F shold LOP protection integral time 0 0 800 5 OP protection threshold 50 LOP th 200 392 C CF reshold OP protection integral time 20 0 800 5 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 0 18000 S delay Tab 9 j 9 5 EEV motor alarm At the end of the commissioning procedure and whenever the controller is powered up the valve motor error recognition procedure is activated This precedes the forced closing procedure and lasts around 10 s The valve is kept stationary to allow any valve motor faults or missing or i
72. lectronic pressure probe 4 to 20mA Maximum number of drivers connected 5 combined ratiometric pressure probe 0 to 5 V resolution 0 1 96 fs measurement error 2 96 fs maximum 1 96 typical 4to 20 mA input max 24 mA resolution 0 5 fs measurement error 896 fs maximum 796 typical 92 low temperature NTC 10 kO at 25 C 50T90 C measurement error 1 C in range 50150 C 3 C in range 450190 C high temperature NTC 50 KQ at 25 C 401150 C measurement error 1 5 C in range 201115 C 4 C in range outside of 20 115 C Combined NTC 10 KQ at 25 C 401120 C measurement error 1 C in range 40T50 C 3 C in range 50T90 C Oto 10V input max 12 V resolution 0 1 96 fs measurement error 996 fs maximumy 896 typica 53 ratiometric pressure probe 0 to 5 V e resolution 0 1 96 fs measurement error 296 fs maximumy 196 typica electronic pressure probe 4 to 20 mA resolution 0 5 96 fs measurement error 896 fs maximumy 796 typica remote electronic pressure probe 4 to 20mA Maximum number of drivers connected 5 4to 20 mA input max 24 mA resolution 0 5 fs measurement error 896 fs maximumy 796 typica combined ratiometric pressure probe 0 to 5 V resolution 0 1 96 fs measurement error 2 96 fs maximum 1 96 typical 54 low temperature NTC 10 kO at 25 C 50T10
73. ler 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 only for CAREL valves controls Tab 4 h The superheat set point and all the parameters corresponding to PID control the operation of the protectors and the meaning and use of probes S1 S3 and or S2 S4 will be automatically set to the values recommended by CAREL based on the selected application During this initial configuration phase only the superheat control mode can be set which differs 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
74. ll 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 4 maximum alarm value parameter set to 150 C will be immediately converted to the corresponding value of 302 F o 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 39 EVD Evolution TWIN 0300006EN rel 1 0 15 06 2009 CAREL 8 4 Variables accessible via serial driver A Description Default Min Max Type CAREL SVP Modbus R W Probe 51 reading 0 20 290 200 2900 A 1 0 R Probe 52 reading 0 60 870 200 2900 A 2 1 R Probe 53 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 Fvaporation temperature 0 60 76 200 392 A 6 5 R Fvaporation 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 Sup
75. lue 93 Pressure 53 200 2900 barg psig A 31 30 CO MINIMUM value C Pressure S3 MINIMUM alarm value 1 20 290 Pressure 53 barg psig A 40 39 CO MAXIMUM alarm value C Pressure S3 MAXIMUM alarm value 93 Pressure 53 200 2900 barg psig A 38 37 CO MINIMUM alarm value C 154 calibration offset 0 20 36 20 36 CF A 42 41 CO C Temperature 54 MINIMUM alarm value 50 60 76 Temperature C F A 47 46 CO 54 MAXIMUM alarm value C Temperature S4 MAXIMUM alarm value 105 Temperature 200 392 C F A 45 44 CO 54 MINIMUM alarm value CONTROL A Superheat set point 11 LowSH thre 180 324 K CF A 50 49 shold A Valve opening at start up evaporator valve capacity ratio 50 0 100 96 _ 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 _ 40 167 A Hot gas bypass temperature set point 0 60 76 200 392 C CE A 28 27 Hot gas bypass pressure set point 3 20 290 200 2900 barg psig A 62 61 E A pressure set point 35 20 290 200 2900 barg psig A 29 28 C_ PID proportional gain 5 0 800 i A 48 47 C PID integral time 50 0 1000 5 I 38 165 C PID derivative time 5 0 800 5 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 5 A 55 54
76. lve opening B 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 1 EVD evolution twin a B E w gt Q A1 100 0 Fig 5 1 Key EVA Electronic valve A A1 Valve opening A For the wiring see paragraph 2 11 General connection diagram EVD Evolution TWIN 0300006EN rel 1 0 15 06 2009 26 CAREL CAREL 6 FUNCTIONS 6 1 Network connection To connect an R 485 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 Description Def Min Max UOM SPECIAL Network settings 2 0 2 bit s 0 4800 1 9600 2 19200 Tab 6 a 6 2 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 calibr
77. m Superheating B 4 9 K Valve opening y B Y Prg Esc tre Fig 9 b control alarm next to the flashing ALARM message the main page shows the type of protector activated B OF F Superheating N 4 9 K MOR Valve opening 44 9 pg ee Fig 9 c o Note to display the alarm queue press the Help button and scroll using the UP DOWN buttons If at the end of the alarms for driver A B the following message is shown Alarms active on driver B A 1 press Esc to return to the standard display 2 press the Help and Enter buttons together to move to the corresponding driver 3 press Help to display the required alarm queue the control alarms can be disabled by setting the corresponding delay to zero Typeofalarm Cause of LED Display Relay Reset Effects on Checks solutions the alarm control Probe 51 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 alarm management amp alarm range parameter 51 alarm manage Pressure 1 MINIMUM 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 configura
78. 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 o OM in Prg Esc 4 Fig 3 f 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 if no button is pressed after 5 min the display automatically returns to the standard mode to set a negative value use ENTER to move to the left most digit and press UP DOWN Modifying the Manufacturer parameters The Manufacturer level is used to configure all the controller parameters and consequently in addition to the Service parameters the parameters relating to alarm management the probes and the configuration of the valve See the table of parameters Procedure 1 press Esc one or more times to switch to the standard display 2 Select driver A or B to set the corresponding parameters see paragraph 3 3 3 press Prg the display shows a screen with the PASSWORD request 4 press ENTER and enter the password for the Manufacturer level 66 starting from the right most figure and confirming each figure with ENTER 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 b
79. n for Carel valves pLAN pack of 10 pcs EVD0000T50 EVD evolution twin for Carel valves R 485 Modbus EVDOOOOT EVD evolution twin for Carel valves RS485 Modbus pack of 10 pcs EVDCONO0021 EVD Evolution connector kit 10pcs for multi pack un Tab 0 a The codes with multiple packages are sold without connectors available separately in code EVDCONO021 1 2 Functions and main characteristics In summary electrical connections by plug in screw terminals serial card incorporated in the controller based on the model tLAN pLAN RS485 Modbus e compatibility with various types of valves universa refrigerants activation deactivation of control via digital input 1 for driver A and digital input 2 for driver B or remote control via pLAN from pCO programmable controller superheat control with protection functions for low superheat LowSH MOP LOP adaptive superheat control function to optimise superheat control for air conditioning units 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 only available on the controllers for CAREL valves configuration and programming by display accessory by computer using the VPM program
80. n input 1 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 the temperature probe 52 and or 54 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 A A Fig 6 m 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 51 calibration gain 4 to 20 mA 1 20 20 S2 calibration offset 0 20 36 20 36 C F volt 52 calibration gain 0 to 10 V 20 20 S3 calibration offset 0 60 870 60 870 barg psig 53 calibration gain 4 to 20 mA 1 20 20 S4 calibration offset 0 20 36 20 36 C F Tab 6 c Digital inputs Digital inputs DI1 and DI2 are used to activate control on driver A and driver B respectively digital input closed control activated digital input open driver in standby see the paragraph Control status Relay outputs The relay outputs can be configured to control
81. ncorrect 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 CAREL 9 6 pLAN error alarm If the connection to the pLAN 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 pLAN error alarm will be signalled The pLAN error affects the operation of the controller as follows case 1 unit in standby digital input DI1 DI2 disconnected driver A B will remain permanently in standby and control will not be able to start case 2 unit in control digital input DIT DI2 disconnected the driver will stop control and will go permanently into standby e case 3 unit in standby digital input DI1 DI2 connected the driver wil remain in standby however contr
82. ng 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 6 Standby Standby corresponds to a situation of rest in which no signals are received to control the electronic valve This normally occurs when the refrigeration unit stops operating either when switched off manually e g from the button supervisor or when reaching the control set point during defrosts except for those performed by reversing of the cycle or hot gas bypass In general it can be said that electronic valve control is in standby when the compressor stops or the control solenoid valve closes The valve is closed or open delivering around 2596 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 f Prepositio
83. ng paragraphs explain all the types of control that can be set on EVD evolution twin Tab 5 a 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 temperature EVD Evolu
84. ng to the type of valve and the objective position there is a constant 5 second delay before the actual control phase starts This is to create a reasonable interval between standby in EVD Evolution TWIN 0300006EN rel 1 0 15 06 2009 28 CAREL 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 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 1096 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 capac
85. ning start control If during standby a control request is received before starting control the valve is moved to a precise initial position Parameter description Def Min Max UOM CONTROL Valve opening at start up evaporator valve 50 0 100 capacity ratio Tab 6 9 This 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 o Note 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 ifthere 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 accordi
86. 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 he set point cannot be reached he integral action is linked to time and moves the valve in proportion o the deviation of the superheat value from the set point The greater he deviations the more intense the integral action in addition the lower the value of T integral time the more intense the action will be The integration time in summary represents the intensity of the reaction of the valve especially when the superheat value is not near the set point thederivative action is linked to the speed of variation of the superheat value that is the gradient at which the superheat changes from instant to instant It tends to react to any sudden variations bringing forward the corrective action and its intensity depends on the value of the time T derivative time Parameter Description Def Min Max UOM CONTROL Superheat set point 11 LowSH thre 180 324 K F shold PID proportional gain 15 0 800 PID integral time 150 0 1000 5 PID derivative time 5 0 800 5 Tab 5 b See the EEV system guide 030220810 for further information 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
87. ntrol special functions such as the hot gas bypass evaporator pressure regulation EPR and control of the valve downstream of the gas cooler in transcritical CO circuits The controller can drive an electronic expansion valve in a refrigerant circuit with Digital Scroll compressor if integrated with a 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 apCO programmable controller to manage the controller via pLAN a pCO programmable controller or PlantVisorPRO supervisor for supervision only via tLAN or RS485 Modbus respectively In this case On Off control is performed via digital input 1 for driver A and via digital input 2 for driver B 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 51 and S2 respectively and with 4 to 20 mA signal for driver B input S3 EVD evolution twin comes with a LED board to indicate the operating status or a graphic display accessory that can be used to perform installation following a guided commissioning procedure involving setting just 4 parameters for each driver refrigerant valve pressure sensor type of main control chiller Showcase etc The procedure can also be used t
88. ntrol signal from an external controller The two last special functions also relate to superheat control Parameter Description Def CONFIGURATION Main control multiplexed Superheat control showcase 1 multiplexed showcase cold room cold room 2 showcase cold room with compressor on board 3 perturbed showcase cold room 4 showcase cold room with sub critical CO 5 R404A condenser for sub critical CO 6 air conditioner chiller with plate heat exchanger 7 air conditioner chiller with tube bundle heat exchanger 8 air conditioner chiller with finned coil heat exchanger 9 air conditioner chiller with variable cooling capacity 10 perturbed air conditioner chiller Special control 1 EPR back pressure 2 hot gas bypass by pressure 3 hot gas bypass by temperature 14 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 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 perturbed cabinet cold room or air conditioner chiller refer to units that momentarily or permanently operate with swinging condensing or evaporation pressure The followi
89. nufacturer programming mode and set the corresponding parameters manually Below are the parameters for driver A and driver B to be set during he 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 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 address 198 1 207 E Tab 4 d 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 Refrigerant The type of refrigerantis essential for calculating the superheat In addition itis used to calculate the evaporation and condensing temperature based on the reading of the pressure probe Parameter description Def CONFIGURATION Refrigerant R404A 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 Tab 4 e Valve Setting the type of valve automatically defines all the control parameter
90. o 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 pack of 10 pcs EVD0000T10 EVD evolution twin universal pLAN EVD0000T11 EVD evolution twin universal pLAN pack of 10 pcs EVD0000T20 EVD evolution twin universal R 485 Modbus EVD0000T21 EVD evolution twin universal RS485 Modbus pack of 10 pcs 9 EVDO000T30 EVD evolution twin for Carel valves EVD0000131 EVD evolution twin for Carel valves tL AN pack of 10 pcs EVD0000T40 EVD evolution twin for Carel valves pLAN EVD evolution twi
91. ol will be able to start if the digita input is closed In this case it will start with current cooling capacity 10096 case 4 unit in control digital input DIT DI2 connected driver A B wil remain in control status maintaining the value of the current cooling capacity If the digital input opens the driver will go to standby and control will be able to start again when the input closes In this case i will start with current cooling capacity 100 9 7 LAN error alarm for amp RS485 Modbus driver If the controller used is fitted for or RS485 Modbus connection to a supervisor or other type of controller no LAN error will be signalled and the situation will have no affect on control The green NET LED will however indicate any problems in the line The NET LED flashing or off indicates the problem has lasted more than 150 s 45 EVD Evolution TWIN 0300006EN rel 1 0 15 06 2009 CAREL 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 he probe does not measure correct values Check that the pressure and the temperature measured are correct and that the pro
92. onding protection is activated integral time 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 bring forward the closing of the valve increase the proportional factor to 30 increase the integral time to 250 sec and increase the deriva tive time to 10 sec 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
93. onfiguration tns 43 9 5 Probe alaims criria iena 43 94 Control alarms ttti 44 95 motor alarm ttt eed 44 9 6 PLAN error Alarrn sesssssscsssscccsssccsssnscccsnssesessssssusnssseannsseeanesseassssonasnssee 45 97 LAN error alarm for tLAN RS485 Modbus driver 45 10 TROUBLESHOOTING 46 11 TECHNICAL SPECIFICATIONS 48 12 APPENDIX VPM VISUAL PARAMETER MANAGER 49 eci 49 49 12 5 Copying the Setup ttt 50 12 4 Setting the default parameters 50 12 5 Updating the controller and display fifmWare 50 EVD Evolution TWIN 0300006EN rel 1 0 15 06 2009 CAREL 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 co
94. ons 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 EVD Evolution TWIN 0300006EN rel 1 0 15 06 2009 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 EVD evolution twin controllers for RS485 Modbus models only Fig 1 c Battery module code EVBAT00400 The EVBATO0400 module is an electronic device made by CAREL which guarantees temporary power supply to the EVD0000T 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
95. or 5 Probe 1 pressure or 4 to 20mA external signal the use of driver A for superheat control requires the use of the 32 Probe 2 temperature or 0 to 10V external signal evaporation pressure probe S1 and the suction temperature probe S2 S3 Probe 3 pressure or 4 to 20mA external signal ace ch which will be fitted after the evaporator and digital input 1 to enable S4 Probe 4 temperature mcn DH Digital input 1 control As an alternative to digital input 1 control can be enabled via DD Digital input 2 remote signal tLAN pLAN RS485 For the positioning of the probes 3 Terminal for tLAN pLan RS485 ModBus connection relating to other applications see the chapter on Control the use of driver B for superheat control requires the use of the EVD Evolution TWIN 0300006EN rel 1 0 15 06 2009 evaporation pressure probe S3 and the suction temperature probe 54 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 inputs S1 2 53 amp 4 are programmable and the connection to the terminals depends on the setting of the parameters See the chapters on Commissioning and Functions pressure probes 51 amp 52 in the diagram are ratiometric See the general connection diagram for the ot
96. 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 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 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 4to 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 if the EVBATOO400 EVBATOO5O0accessory is fitted advanced alarm management models only and Series of accessories for EVD evolution twin Display code EVDISO0 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 installati
97. ortional gain 15 0 800 PID integral time 150 0 1000 s PID derivative time 5 0 800 5 Tab 5 i Hot gas bypass by temperature This control function can be used to control cooling capacity which in the following example is performed by driver B On a refrigerated cabinet if the ambient temperature probe 54 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 1 0 15 06 2009 24 CAREL Fig 5 h Key CP Compressor V Solenoid valve C Condenser EEVA Electronic expansion valve A L Liquid receiver EVB Electronic valve B F Dewatering filter E Evaporator 5 Liquid indicator PA Pressure probe driver A TA TB Temperature probe 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 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 C76 992 PID proportional gain 15 0 800 PID integral time 15
98. osimplysettingthe networkaddress The display will then be able to be removed and the configuration procedure postponed to a later stage using the supervisoror 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 set the values of the parameters for driver B refrigerant valve B with the valve stopped in the last position pressure probe 53 main control pCO PROGRAMMABLE CONTROLLER the first operation to be O press Enter to confirm the press UP DOWN to move to value the next parameter refrigerant for driver A indicated by the letter at the top right O repeat steps 2 3 4 5 to modify the values of the parameters for driver A refrigerant valve pressure probe S1 main control
99. p the connection of wires 1 and 3 CAREL 2 CAREL valves connected in complementary mode 2 CAREL valves connected in parallel mode CAREL E V CAREL E V VALVE A_1 VALVE B_1 lm 4 4 2 2 3 I 3 I 1 1 CAREL E V CAREL E V VALVE A 2 VALVE B 2 4 4 2 2 Er N E 11 i 33 ca i i 3 2 4 i 31214 o 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 ESV E6V Two EXV OK OK E4V85 with all refrigerants NO NO NO connected except for R410A together E4V95 only with R134a Tab 2 b 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 53 remote remote 0 5 to 7 barg P2 driver B
100. parameter has elapsed If a protector is not enabled integral time 0 s no alarm will be signalled If before the expiry of the delay the protector control variable returns back inside the corresponding threshold no alarm will be signalled Note this is a likely event as during the delay the protection function will have an effect If the delay relating to the control alarms is set to O s the alarm is disabled The protectors are still active however The alarms are reset automatically EVD Evolution TWIN 0300006EN rel 1 0 15 06 2009 44 CAREL 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 O s the alarm is disabled The alarm is reset automatically with a fixed differential of 3 C above the activation threshold Relay activation for contro
101. phic 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 I e Surriscaldam at E he ON gt D SD MOP Jl 6 De em ALARMA 44 Item gt ne E iD Ha x fp b variable 1 on the display driver A B variable 2 on the display driver A B relay status driver A B alarm press HELP protector activated control status current display driver A driver B adaptive control in progress SINIJA Ito ND 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 Keypad Button Function Prg opens the screen for entering the password to access programming mode if in alarm status displays the alarm queue in the Manufacturer level when scrolling the parameters shows the explanation screens Help pressed together with ENTER switches the display from one driver to the other a PIAN TA Esc exits the Programming Service Manufacturer and Display modes
102. plication 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 Tab 10 a 47 EVD Evolution TWIN 0300006EN rel 1 0 15 06 2009 CAREL 11 TECHNICAL SPECIFICATIONS Power supply 24 Vac 10 15 50 60 Hz to be protected by an external 2 A type T fuse Use a dedicated class 2 transformer max 100 VA Lmax 5 m Power input 35 VA Emergency power supply 22 Vdc 5 If the optional EVBAT00400 module is installed Lmax 5 m Insulation between relay output and other outputs reinforced 6 mm in air 8 mm on surface 3750 V insulation Motor connection 4 wire shielded cable AWG 22 Lmax 10 m or AWG 14 Lmax 50m Digital input connection Digital input to be activated from voltage free contact or transistor to GND Closing current 5 mA Lmax 30 m Probes Lmax 10 m S1 with shielded cable less than 30 m ratiometric pressure probe 0 to 5 V resolution 0 1 96 fs measurement error 296 fs maximum 196 typical electronic pressure probe 4 to 20 mA resolution 0 5 96 fs measurement error 896 fs maximum 796 typical remote e
103. r 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 temperature 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 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 53 4 4 20 A 78 77 R Control set point 0 60 870 200 2900 A 67 66 R Valve position 0 0 9999 49 176 R Current unit cooling capacity 0 0 00 50 177 RAW Last tuning result 0 0 8 78 205 R Tuning method 0 0 255 80 207 RAW Adaptive control status 0 0 0 77 204 R Low suction temperature 0 0 D 29 28 R X EEV motor error 0 0 D 30 29 R Status of relay B 0 0 D 31 30 R LOP low evaporation temperature 0 0 D 27 26 R 3 OP high evaporation temperature 0 0 D 28 27 R 5 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 EVD Evolution TWIN 0300006EN rel 1 0 15 06 2009 i c eo a 40 CAREL Type of variable A analogue
104. ready active amp alarm delay parameters ture parameter Low suction Threshold and de ALAR Depends on automatic o effect Check the threshold and delay temperature lay time exceeded flashing configuration parameters parameter EVD Evolution TWIN 0300006EN rel 1 0 15 06 2009 42 CAREL 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 motorerror 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 pLAN error pLAN pLAN network green ALARM flashing Depends on automatic Control based Check the network address settings EVD only communication ETLED configuration on DI1 error ashing parameter pLAN network ETLED ALARM flashing Depends on automatic Control based Check the connections and that the connection error off configuration on DI2 pCO is on and working parameter LAN error tLAN Network
105. replacement goods or services 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 o
106. reset following the activation ofthe 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 O 800 S ALARM CONFIGURATION Low superheat alarm delay 300 0 18000 S LowSH 0 alarm disabled Tab 7 b EVD Evolution TWIN 0300006EN rel 1 0 15 06 2009 30 CAREL 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 ON Low SH OFF ON A OFF Fig 7 a Key SH Superheat A Alarm Low 5 TH Low SH protection threshold D Alarm delay Low SH Low SH protection t Time B Automatic alarm reset LOP low evaporation
107. ressor 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 oad 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 emperature the output of the refrigeration unit needs to be decreased This can be done by controlled closing of the electronic valve implying superheat is no longer controlled and an increase in the superheat emperature The protector will thus have a moderate reaction that tends o 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 evapor
108. s based on the manufacturer s data for each model In Manufacturer programming mode the control parameters can then be fully customised if the valve used is not in the standard list In this case the controller will detect the modification and indicate the type of valve as Customised Parameter description Def CONFIGURATION Valve CAREL CAREL ExV 2 Alco EX4 3 Alco EX5 4 Alco EX6 5 Alco EX7 EXV Alco EX8 330 Hz recommended CAREL Alco EX8 500 Hz specific Alco 8 Sporlan SEI 0 5 11 9 Sporlan SER 1 5 20 10 Sporlan SEI 30 11 Sporlan SEI 50 12 Sporlan SEH 100 13 Sporlan SEH 175 14 Danfoss ETS 12 5 25B 15 Danfoss ETS 50B 16 Danfoss ETS 100B 17 Danfoss ETS 250 18 Danfoss ETS 400 19 Two EXV CAREL connected together 20 Sporlan SER I GJ K 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 Tab 4 f EVD Evolution TWIN 0300006EN rel 1 0 15 06 2009 CAREL Pressure probes S1 amp 53 Setting the type of pressure probe S1 for driver A and 53 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 Parame
109. s to another controller read the list of parameters from the source controller with the Read command remove the connector from the service serial port connect the connector to the service port on the destination controller write the list of parameters to the destination controller with the Write command 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 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 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 1 0 15 06 2009 50 CAREL CAREL 51 EVD Evolution TWIN 0300006EN rel 1 0 15 06 2009
110. tection 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 calibration of the low pressure switch and decrease the value of the LOP integral time Solenoid blocked Check that the solenoid opens correctly check the electrical connections and the operation of the relay 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 b
111. ten the screws and lightly ug 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 he probe cables avoid installing the probe cables in the immediate vicinity of power devices contactors circuit breakers etc Reduce the path of the probe cables as much as possible and avoid enclosing power devices avoid powering the controller directly from the main power supply in the panel if this supplies different devices such as contactors solenoid valves etc which will require a separate transformer 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 swa
112. ter description Def CONFIGURATION Probe S1 53 Ratiom Ratiometric OUT 0 to 5 V Electronic OUT 4 to 20 mA 1 to 93 1 1 to 4 2 barg 8 0 5 to 7 barg barg 2 0 4 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 9 0 to 10 barg 0 0 to 18 2 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 Tab 4 g 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 oO Note in the case of multiplexed systems where the same pressure probe is shared between the twin 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 o Note the range of measurement by default is always in bar gauge barg In the manufacturer menu the parameters correspond
113. the solenoid valve or as an alarm relay output See the chapter on Alarms Parameter description Def CONFIGURATION Relay configuration Alarm 1 Disabled 2 Alarm relay open when alarm active relay 3 Solenoid valve relay open in standby 4 Valve alarm relay open in standby and control alarms Tab 6 d 6 3 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 forced closing initialisation o instrument on standby no temperature control unit OFF wait opening of the valve before starting control also called pre positioning when powering the unit and in the delay after defrosting control effective control of the electronic valve unit ON positioning step change in the valve position corresponding to the start of control when the cooling capacity of the controlled unit varies only for pLAN EVD connected to a pCOJ stop end of control with the closing of the valve corresponds to the end of temperature control of the refrigeration unit unit OFF valve motor error recognition see paragraph 9 5 tuning in progress see paragraph 5 3 the valve position when switching the EVD Evolution TWIN 0300006EN rel 1 0 15 06 2009 Forced closing Forced closi
114. tion the relay contact is closed and 7 opens when any alarm is activated It can be used to switch off the compressor and the system in the event of alarms S solenoid valve relay during normal operation the relay contact is 9 Closed and is open only in standby There is no change in the event L of alarms Fia 9 d solenoid valve relay alarm during normal operation the relay contact ons 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 the event of low evaporation temperature closing the solenoid valve would worsen the situation Key L Phase N Neutral COMx NOx Alarm relay output Parameter description Def Relay configuration Alarm 1 Disabled relay 9 3 Probe alarms 2 Alarm relay open when alarm active 3 Solenoid valve relay open in standby 4 Valve alarm relay open in standby and control 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 Tab 9 g 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 restricte
115. tion TWIN 0300006EN rel 1 0 15 06 2009 20 CAREL 5 CONTROL 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 o the gas cannot be quantified here is therefore un undetermined risk to the compressor that must e avoided Moreover a high superheat temperature as mentioned orresponds 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 Alow superheat temperature in fact corresponds to a situation of probable instability due to the turbulent evaporation process approaching the measurement point of the probes
116. tion parameter Probe the Probe S2 alarm management amp alarm range parameter 52 alarm manage Temperature S2 MINIMUM MAXI ment MUM alarm value parameters Probe 53 Probe 53 faulty red alarm ALAR Depends on automatic Depends on Check the probe connections Check or exceeded se LED flashing configuration parameter Probe the Probe 53 alarm management alarm range parameter 53 alarm manage Pressure 3 MINIMUM 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 set LED flashing configuration parameter Probe the Probe S4 alarm management amp alarm range parameter S4 alarm manage Temperature S4 MINIMUM MAXI ment UM 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 tion temperature activated amp LOP configuration already active LOP threshold amp alarm delay para parameter meters MOP high evapo MOP protection ALARM flashing Depends on automatic Protection action Check the MOP protection threshold ration tempera activated amp MOP configuration al
117. tioner chiller with Digital Scroll compressor Tab 5 g Note this regulation is available only for CAREL valve controls 5 5 Special control EPR back pressure This type of control can be used in applications in which a constant pressure is required in the refrigerant circuit For example a refrigeration system may include 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 EVD evolution twin Fig 5 f Key VI Solenoid valve V2 Thermostatic expansion valve E1 E2 EVA EVB Evaporator 1 2 Electronic valve A B 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 51 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
118. tions 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 Lasttuning result Parameter Description Def Min Max UOM SPECIAL Tuning method 0 0 255 Tab 5 f Tuning method is visible as a parameter in the Special category the two other parameters are visible in display mode See paragraph 3 4 Note the Tuning method parameter is for use by qualified CAREL technical personnel only and must not be modified 5 4 Control with Digital Scroll compressor 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 pLAN version driver must be connected to a Carel pCO series 23 controller running a special application to manage units with Digital scroll compressors Parameter Description Def CONFIGURATION Main control multiplexed showcase cold room air condi
119. uttons 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 EVD Evolution TWIN 4 0300006EN rel 1 0 15 06 2009 CAREL 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 A Important all the controller parameters can be modified by entering the Manufacturer level if when setting a parameter the value entered is out of range this is not accepted and the parameter soon after returns to the previous value if no button is pressed after 5 min the display automatically returns to the standard mode EVD Evolution TWIN 0300006EN rel 1 0 15 06 2009 16 CAREL 4 COMMISSIONING 4 1 Commissioning 4 2 Guided commissioning procedure Once the electrical connections have been completed see the chapter display on installation and the power supply has been connected the operations required for commissioning the controller depend on the type of interface used however essentially involve setting just 4 parameters refrigerant Configuration Configuration valve type of pressure probe S1 for driver A and S3 for driver B and type Netvork address lage of main control The network address for EVD evolution twin
120. 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 5 LOP protection threshold 50 60 76 MOP Cer threshold LOP protection integral time 0 0 800 5 OP protection threshold 50 LOP thre 200 392 C F shold OP protection integral time 20 0 800 S Tab 5 c 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 manualautotuning this is activated by the user and involves just one optimisation procedure Both procedures give new values to the PID superheat control and protection function parameters PID proportional gain PID integral time PID derivative time LowSH low superheat integral time LOP low evaporation temperatur
121. wise it would be activated unnecessarily and greater than the calibration of the low pressure switch otherwise it would be useless As an initial approximation it can be set to a value exactly half way between the two limits indicated the protector has no purpose in multiplexed systems showcases where the evaporation is kept constant and the status of the individual electronic valve does not affect the pressure value CAREL the LOP alarm can be used as an alarm to highlight refrigerant leaks by the circuit A refrigerant leak in fact causes an abnormal lowering of the evaporation temperature that is proportional in terms of speed and extent to the amount of refrigerant dispersed T EVAP LOP TH ON i LOP i i 1 1 1 1 gt 1 1 I t ON 1 1 A l l OFF i 1 1 _ny 7T7 l Y UD B t Fig 7 b Key T EVAP Evaporation temperature D Alarm delay 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 comp

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