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1. Probes Lmax 10 m S1 ratiometric pressure probe 0 to 5 V less than 30 m with e resolution 0 1 FS shielded cable measurement error 2 FS maximum 1 typical electronic pressure probe 4 to 20 mA e resolution 0 5 FS measurement error 8 FS maximum 7 typical remote electronic pressure probe 4 to 20 mA maximum number of drivers connected 5 resolution 0 1 FS measurement error 2 FS maximum 1 typical 4 to 20 mA input max 24 mA resolution 0 5 FS measurement error 8 FS maximum 7 typical S2 low temperature NTC 10kQ at 25 C 50T90 C measurement error 1 C in the range 50T50 C 3 C in the range 50T90 C high temperature NTC 50kO at 25 C 40T150 C measurement error 1 5 C in the range 20T115 C 4 C in the range outside of 20T115 C NTC built in 10kQ at 25 C 40T120 C measurement error 1 C in the range 40T50 G 3 C in the range 50T90 C 0 to 10V input max 12 V resolution 0 1 FS measurement error 9 FS maximum 8 typical 53 ratiometric pressure probe 0 to 5 V resolution 0 1 FS measurement error 2 FS maximum 1 typical electronic pressure probe 4 to 20 mA e resolution 0 5 FS measurement error 8 FS maximum 7 typical electronic pressure probe 4 to 20 mA remote Maximum number of controllers connected 5 combined ratiometric pressure probe 0 to 5 V resolution 0 1 FS
2. Parameter description Def Min Max UOM CONTROL EPR pressure set point 3 5 20 290 200 2900 barg psig PID proport gain 15 0 800 PID integration time 150 __ 0 1000 s PID derivative time 5 0 800 s Tab 5 m Hot gas bypass by pressure This control function can be used to control cooling capacity If there is no request from circuit B the compressor suction pressure decreases and the bypass valve opens to let a greater quantity of hot gas flow and Key decrease the capacity of the circuit CP_ Compressor V__ Solenoid valve C__ Condenser S___ Liquid gauge L Liquid receiver EV__ Electronic valve F__ Dewatering filter E Evaporator T _ Temperature probe Parameter Description Def __ Min Max UOM ADVANCED Superheat setpoint 11 LowSH 180 324 K F i threshold gt PID proportional gain 15 0 800 PID integral time 150 JO 1000 S PID derivative time 5 0 800 S 5 7 Advanced regulation EPR back pressure This type of control can be used in many 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 Evaporato
3. S4 set point diff set point 4 offset too high ON SV OFF t S4 set point diff set point 5 offset correct t ON SV OFF t gt Fig 5 0 Key diff differential SV solenoid valve showcase temperature control S4 temperature EVD evolution Key CP_ Compressor EEV Electronic expansion valve C__ Condenser V Solenoid valve L Liquid receiver E Evaporator F Dewatering filter P Pressure probe transducer S Liquid indicator T _ Temperature probe For the wiring see paragraph 2 11 General connection diagram CAREL Backup probes on S3 amp S4 Important this type of control is compatible with the main control parameter setting between 1 and 18 In this case pressure probe S3 and temperature probe S4 will be used to replace probes S1 and S2 respectively in the event of faults on one or both so as to guarantee a high level of reliability of the controlled unit Fig 5 q Key CP_ Compressor EEV Electronic expansion valve C__ Condenser V__ Solenoid valve L Liquid receiver E Evaporator F Dewatering filter P Pressure probe transducer S Liquid indicator T_ _ Temperature probe For the wiring see paragraph 2 11 General connection diagram Subcooling measurement This function measures subcooling using a pressure probe and a temperature probe connected to inputs S3 and S4 respectively The reading can be
4. F A 59 58 C CO regul A coefficient 33 100 800 A 63 62 C_ CO regul B coefficient 22 7 100 800 A 64 63 C Start manual tuning 0 no 1 yes 0 0 1 D 39 38 i C Tuning method 50 0 255 79 206 0 100 automatic selection 101 141 manual selection 142 254 not accepted 255 PID parameters identified model C Network settings 2 0 2 bit s 74 201 CO 0 4800 1 9600 2 19200 A Power supply mode 0 0 D 47 46 0 24 Vac 1 24 Vdc C Enable mode single on twin parameter disabled 0 0 D 58 57 0 Twin 1 Single C Stop manual positioning if net error 0 0 D 59 58 0 Normal operation 1 Stop ALARM CONFIGURATION C Low superheat alarm timeout LowSH 300 0 8000 S 43 70 0 alarm DISABLED C Low evap temp alarm timeout LOP 300 0 8000 S 41 68 0 alarm DISABLED C High evap temp alarm timeout MOP 600 0 8000 s 42 169 0 alarm DISABLED C_ High cond temp alarm timeout High Tcond 600 0 8000 S 44 171 0 alarm DISABLED C_ Low suction temperature alarm threshold 50 60 76 200 392 C F A 26 25 Low suct temp alarm timeout 300 0 8000 s 9 36 0 alarm DISABLED VALVE C_ EEV minimum steps 50 0 9999 step 30 157 C_ EEV maximum steps 480 0 9999 step 31 58 C_ EEV closing steps 500 0 9999 step 36 163 C_ EEV nominal step rate 50 1 2000 step s 32 59 C EEV nominal 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
5. 3 enable automatic adaptive control 4 activate one or more manual autotuning procedures with the unit in stable operating conditions if adaptive control generates the Adaptive control ineffective alarm 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 cabinet cold room air conditioner chiller or cabinet cold room with adaptive control Tab 5 e The activation status of the tuning procedure will be shown on the standard display by the letter T CAREL 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 e during the optimisation phase maintenance of the superheat set point is not guaranteed however
6. exchanger S which heats it back to the set point reheating EVD evolution a o aa Fig 5 EVD evolution 0300005EN rel 3 3 25 01 2013 24 CAREL Key CP Compressor EV 1 Electronic valves connected in com EV_2 plementary mode C__ Condenser i Temperature probe V1_ Solenoid valve E Evaporator V3_ Non return valve V2 Thermostatic expansion valve S Heat exchanger reheating Transcritical CO2 gas cooler This solution for the use of CO in refrigerating systems with a transcritical cycle involves using a gas cooler that is a refrigerant air heat exchanger resistant to high pressures in place of the condenser In transcritical operating conditions for a certain gas cooler outlet temperature there is pressure that optimises the efficiency of the system Set A T B Set pressure set point in a gas cooler with transcritical CO3 T gas cooler outlet temperature Default value A 3 3 B 22 7 In the simplified diagram shown below 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 EVD evolution aa VI V2 Fig 5 j Key CP_ Compressor V2_ Thermostatic expasnion valve GC_ Gas cooler EV_ Electronic valve E Evaporator IHE V1_ Solenoid valve Inside heat exchanger For the wiring see paragrap
7. expansion valve By correctly setting the related parameters see below a very stable cabinet temperature can be achieved around the set point without ever closing the solenoid valve The function is defined by three parameters set point differential and offset Parameter description Def Min Max UOM ADVANCED odul thermost setpoin 0 60 200 C F 76 392 odul thermost differential 0 1 0 1 100 C CF 0 2 _ 180 odul thermost SHset offset 0 fun 0 0 0 1100 K R ction disabled 180 Tab 5 s The first two should have values similar to those set on the controller for the cabinet or utility whose temperature is being modulated The offset on the other hand defines the intensity in closing the valve as the temperature decreases the greater the offset the more the valve will be modulated The function is only active in a temperature band between the set point and the set point plus the differential A Important the Modulating thermostat function should not be used on stand alone refrigeration units but only in centralised systems In fact in the former case closing the valve would cause a lowering of the pressure and consequently shut down the compressor EVD evolution 0300005EN rel 3 3 25 01 2013 26 CAREL Examples of operation S4 set point diff set point Y 3 offset too low or function disabled sya OFF
8. the standard mode to seta negative value move to the left most digit and press Up Down 15 Modifying the Manufacturer parameters The Manufacturer level is used to configure all the driver 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 press Prg the display shows a screen with the PASSWORD request 3 press ENTER and enter the Manufacturer level password 66 starting from the right most figure and confirming each figure with ENTER 4 ifthe value entered is correct the list of parameter categories is shown Configuration Probes Control Special Alarm configuration Valve 5 press the UP DOWN buttons to select the category and ENTER to access the first parameter in the category 6 press UP DOWN to select the parameter to be set and ENTER to move to the value of the parameter 7 press UP DOWN to modify the value 8 press ENTER to save the new value of the parameter 9 1 repeat steps 6 7 8 to modify the other parameters 0 press Esc to exit the procedure for modifying the Manufacturer parameters SPECIAL ALARM COMFIGUESTICH UAL LIE Note all the driver parameters can be modified by entering the Manufacturer level if when setting a parameter the value entered is out
9. 0300005EN rel 3 3 25 01 2013 CAREL Type of alarm _ Cause of alarm LED Display Relay Reset Effect on control Checks solutions EEV motor error Valve motor fault red alarm ALARM flashing Depends on automatic Interruption Check the connections and the condi not connected LED configuration tion ofthe motor parameter Switch driver off and on again LAN error LAN network green ALARM flashing Depends on automatic Control based on Checkthe network address settings communication NET LED configuration DI1 DI2 error flashing parameter LAN network NET LED ALARM flashing Depends on automatic Control based on Check the connections and that the connection error off configuration DI1 DI2 pCO is on and working parameter Display No communi Error message o change replace the o effect Check the driver display and the connection error cation between driver display connectors driver and display Adaptive control Tuning failed ALARM flashing o change automatic o effect Change Main control parameter ineffective setting Battery Battery discharged red alarm Alarm flashing o change replace the o effect If the alarm persists for more than 3 discharged or faulty or elec LED battery hours recharge time for EVBAT00500 trical connection flashing replace the battery interrupted Wrong power DC driver power Green Depends on the Change Total shutdo
10. 14 Lmax 50m failure to connect he valve motors after connecting the driver will generate the EEV motor error alarm see paragraph 9 5 4 carefully evaluate the maximum capacity of the relay output specified in the chapter Technical specifications 5 if necessary use a class 2 safety transformer suitably protected against short circuits and voltage surges For the power ratings see he general connection diagram and the technical specifications 6 the minimum size of the connection cables must be 0 5 mm power up the driver in the event of 24 Vdc power supply the drive will close the valve 2 4 A Important in the event of 24 Vdc power supply set the Power supply mode parameter 1 to start control See par 6 1 8 program the driver if necessary see the chapter User interface 9 connect the serial network if featured follow to the diagrams below for the earth connection Drivers in a serial network Case 1 multiple drivers connected in a network powered by the same transformer Typical application for a series of drivers inside the same electrical panel 230 Vac pco sss 880 Fig 2 d Case 2 multiple drivers connected in a network powered by different transformers GO not connected to earth Typical application for a series of drivers in different electrical panels 230 Vac 230 Vac Fig 2 e Case 3 multiple drivers connected in a net
11. 5 R404A condenser for subcritical CO 6 air conditioner chiller with plate heat exchanger 7 air conditioner chiller with tube bundle heat exchanger 8 air conditioner chiller with finned coil heat exchanger 9 air conditioner chiller with variable cooling capacity 0 perturbed air conditioner chiller Advanced control 1 EPR back pressure 2 hot gas bypass by pressure 3 hot gas bypass by temperature 4 gas cooler CO transcritical 5 analogue positioner 4 to 20 mA 6 analogue positioner 0 to 10 V 7 air conditioner chiller or cabinet cold room with adapti ve control 8 air conditioner chiller with digital scroll compressor 9 AC chiller with BLDC scroll compressor 20 superheat control with 2 temperature probes 21 I O expansion for pCO Tab 5 a only for CAREL valve drivers O Note e 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 perturbated cabinet cold room or air conditioner chiller refer to units that momentarily or permanently operate with swinging condensing or evaporation pressure Auxiliary control features the following settings Parameter description Def CONFIGURATION Auxiliary control Disabled 1 Disabled 2 High condensing temper
12. EVD control should be set to 0 zero the driver 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 drivers using the supervisor the setup operation on the display can be limited to simply setting the network address The display will then be able to be removed and the configuration procedure postponed toa later stage using the supervisor or if necessary reconnecting the display To enable control of the driver 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 driver 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 DI2 closes 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 driver will immediately stop control and will remain in standby until re enabled with the valve stopped in the last position pCO PROGRAMMABLE CONTROLLER the first operation to be performed if necessary is to set the network address using the display fa pLAN tLAN or Modbus driver i
13. Functional earth 1 3 2 4 Stepper motor power supply COM1 NO1 Alarm relay GND Earth for the signals VREF Power to active probes S1 Probe 1 pressure or 4 to 20 mA external signal S2 Probe 2 temperature or 0 to 10 V external signal S3 Probe 3 pressure S4 Probe 4 temperature DII Digital input 1 DI Digital input 2 amp Terminal for tLAN pLAN RS485 Modbus connection Terminal for tLAN pLAN RS485 Modbus connection Terminal for pLAN RS485 Modbus connection aa service serial port remove the cover to access b serial por Tab 2 a 2 3 Connection diagram superheat control CAREL EXV dH e e M 2AT Fa 20VA vg 085 3 2 4 32 LU annannnnnnnnnnaonnon Ju NET TTD EVDCNVOOEO ier 5 5 OPEN I z CLOSE dea ___ Ue n on i ji DOUUUUDUUUDUUUUUU og tei amp ME 559n3 55 GND il 3 in combination with Alco EX7 or EX8 valves use a 35 VA transformer code TRADRFE240 Key 1 green 2 yellow 3 brown 4 white 5 personal computer for configuration 6 USB tLAN converter 7 adapter 8 ratiometric pressure transducer evaporation pressure 9 NTC suction temperature 10 digital input 1 configured to enable control 11 free contact up to 230 Vac 12 solenoid valve 13 alarm signal Note connect the valve cable shield
14. Network connection To connect an RS485 Modbus controller to the network as well as the network address parameter see paragraph 4 2 the communication speed also needs to be set in bit s using the Network settings parameter Parameter Description Def Min Max UoM ADVANCED NETWORK SETTINGS 2 0 2 bit s 0 4800 1 9600 2 19200 Tab 6 b O Note the following Modbus serial communication parameters cannot be set byte size 8 bits stop bits 2 parity none transmission mode RTU 6 3 Inputs and outputs Analogue inputs The parameters in question concern the choice of the type of pressure probe S1 and S3 and the choice of the temperature probe S2 and S4 as well as the possibility to calibrate the pressure and temperature signals As regards the choice of pressure probe S1 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 The auxiliary probe S4 is associated with the Modulating thermostat function or can be used as a backup probe for the main probe S2 Type CAREL code Range CAREL NTC 10KQ at 25 C NTCO HP00 50T105 C NTCO WF00 NTCO HF00 CAREL NTC HT H
15. Priority of digital inputs In certain cases the setting of digital inputs 1 and 2 may be the same or alternatively may be incompatible e g digital input 1 regulation backup digital input 2 regulation security The problem thus arises to determine which function the driver needs to perform Consequently each type of function is assigned a priority primary PRIM or secondary SEC as shown in the table DI1 DI2 configuration 1 Disabled S 2 Valve regulation optimization after defrost S 3 Discharged battery alarm management S 4 Valve forced open at 100 SEC P P P Type of function EC 5 Regulation start stop 6 Regulation backup 7 Regulation security There are four possible cases of digital input configurations with primary or secondary functions Function set Function performed by digital input Di DI2 PRIM SEG PRIM PRIM DI PRIM SEC DI DI2 SEC PRIM DI2 DiI SEC SEC Regulation backup DIT supervisor variable Note that if digital inputs 1 and 2 are set to perform a PRIM function only the function set for input 1 is performed if the digital inputs 1 and 2 are set to perform a SEC function only the SEC function set for input 1 is performed the driver will be set to Regulation backup with the value of the digital input determined by the Regulation backup from supervisor variable Relay output The relay output can be configured
16. Reverse high condensing temperature s3 protection on 3 Tab 6 e Parameter description Def Configuration Probe S3 Ratiom 1 to Ratiometric OUT 0 to 5 V Electronic OUT 4 to 20 MA 1 1 to 4 2 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 8 0 5 to 7 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 4 20 mA external signal cannot be selected 21 1 to 12 8 barg 22 0 to 20 7 barg 23 1 86 to 43 0 barg 9 3 barg Tab 6 f Calibrating pressure probes S1 S3 and temperature probes S2 and S4 offset and gain parameters In case it is necessary to make a calibration of the pressure probe S1 and or S3 it is possible to use the offeset parameter which represents a constant that is added to the signal across the entire range of measurement and can be expressed in barg psig If the 4 to 20 mA signal coming from an external controller on input S1 needs to be calibrated both the offset and the gain parameters can be used the latter which modi line in the field from 4 to 20 mA fies the gradient of the of the temperature probe S2 and or S4 it is possible to use the offset paramet
17. autotuning EVD evolution features two functions used to automatically optimise the PID parameters for superheat control useful in applications where there are frequent variations in thermal load 1 automatic adaptive control the function continuously evaluates the effectiveness of superheat control and activates one or more optimisation procedures accordingly 2 manual autotuning this is activated by the user and involves just one optimisation procedure Both procedures give new values to the PID superheat control and protection function parameters PID proportional gain PID integration time PID derivative time LowSH low superheat integration time LOP low evaporation temperature integration time MOP high evaporation temperature integration time iTcond high condensing temperature integration time Given the highly variable dynamics of superheat control on different units applications and valves the theories on stability that adaptive control and autotuning are based on are not always definitive As a consequence the following procedure is suggested in which each successive step is performed if the previous has not given a positive outcome 1 use the parameters recommended by CAREL to control the different units based on the values available for the Main control parameter 2 use any parameters tested and calibrated manually based on laboratory or field experiences with the unit in question
18. by parameter Series of accessories for EVD evolution Display code EVDIS00 0 Easily applicable and removable at any time from the front panel of the driver during normal operation displays all the significant system variables the status of the relay output and recognises the activation of the protection functions and alarms During commissioning it guides the installer in setting the parameters required to start the installation and once completed can copy the parameters to other drivers The models differ in the first settable language the second language for all models is English EVDISOO 0 can be used to configure and monitor all the control parameters accessible via password at a service installer and manufacturer level EVD evolution Fig 1 a USB tLAN converter code EVDCNVOOEO The USB tLAN converter is connected once the LED board cover has been removed to the service serial port underneath Fitted with cables and connectors it can connect EVD evolution directly to a computer which using the VPM program can configure and program the driver VPM can also be used to update the driver and display firmware Fig 1 b EVD evolution 0300005EN rel 3 3 25 01 2013 CAREL USB RS485 converter code CVSTDUMORO The converter is used to connect the configuration computer and the EVD evolution controllers for RS485 Modbus models only Fig 1 c Ultracap module P N EVDOOOO0UCO The
19. guided commissioning procedure 4 3 Auxiliary refrigerant In the event of cascade systems comprising a main circuit and a secondary circuit the auxiliary refrigerant is the refrigerant in the secondary circuit See the paragraphs Auxiliary control and Reverse high condensing temperature protection HiTcond on 3 The default value 0 sets the same refrigerant as in the main circuit Parameter description Configuration Def Min Max UOM Auxiliary refrigerant 0 7 0 same as main circuit 1 R22 2 R134a 3 R404A 4 R407C 5 R410A 6 R507A 7 R290 8 R600 9 R600a 10 R717 11 R744 12 R728 13 R1270 14 R417A 15 R422D 16 R413A 17 R422A 18 R423A 19 R407A 20 R427A 21 R245FA 22 R407F 23 R32 24 HTRO1 25 HTRO2 Tab 4 i EVD evolution 0300005EN rel 3 3 25 01 2013 18 CAREL 4 4 Checks after commissioning After commissioning e check that the valve completes a full closing cycle to perform alignment set if necessary in Service or Manufacturer programming mode the superheat set point otherwise keep the value recommended by CAREL based on the application and the protection thresholds LOP MOP etc See the chapter on Protectors 4 5 Other functions By entering Service programming mode other types of main control can be selected transcritical CO2 hot gas bypass etc as well as so called advanced control functions which do
20. 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 product in relation to its advanced level of technology requires setup configuration programming commissioning to be able to operate in he 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 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 n addition to observing any further warnings described in this manual the ollowing warnings must be heeded for all CAREL products prevent the electronic circuits from getting wet Rain humidity and all ypes of liquids or condensate contain corrosive minerals that may damage he electronic circuits In any case the product should be used or stored in environments that comply with the temperature and humidity limits specified in the manual e do not install the device in particularly hot environments Too high emperatures may reduce the life of electronic devices damage them and deform or melt the plastic parts In any case the product should be used or stored in environments that comply with the temperature and humidity limits spe
21. 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 0300005EN rel 3 3 25 01 2013 4 1 Commissioning Once the electrical connections have been completed see the chapter oninstallation and the power supply has been connected the operations required for commissioning the driver depend on the type of interface used however essentially involve setting just 4 parameters refrigerant valve type of pressure probe S1 and type of main control Types of interfaces DISPLAY after having correctly configured the setup parameters confirmation will be requested Only after confirmation will the driver be enabled for operation the main screen will be shown on the display and control will be able to commence when requested by the pCO controller via LAN or when digital input DI1 DI2 closes See paragraph 4 2 VPM to enable control of the driver via VPM set Enable EVD control to 1 this is included in the safety parameters in the special parameters menu under the corresponding access level However the setup parameters should first be set in the related menu The driver will then be enabled for operation and control will be able to commence when requested by the pCO controller via LAN or when digital input DI1 DI closes If due to error or for any other reason Enable
22. on 4 to 20 mA cannot be selected 1 20 20 A 83 81 C S3 pressure MINIMUM value 1 20 290 S3 pressure barg psig A 33 32 MAXIMUM value C S3 pressure MAXIMUM value 93 S3 pressure MI 200 2900 barg psig A 31 30 NIMUM value C S3 alarm MIN pressure 1 20 290 S3 alarm MAX barg psig A 40 39 pressure C S3 probe alarm MAX pressure 9 3 S3 alarm MIN 200 2900 barg psig A 38 37 pressure C S4 calibrat offset 0 20 36 20 36 C F A 42 41 C S4 alarm MIN temperat 50 60 76 S4 alarm MAX C F A 47 46 temp C S4 alarm MAX temperat 105 S4 alarm MIN 200 392 C F A 45 44 temp CONTROL A Superheat set point 11 LowSH thre 180 324 K R A 50 49 shold A_ Valve opening at start up 50 0 100 37 164 C Valve opened in standby 0 0 1 D 23 22 0 disabled valve closed 1 enabled valve open according to parameter Valve position in stand by EVD evolution 0300005EN rel 3 3 25 01 2013 38 CAREL S n 5 x_ Parameter description Def Min Max UOM g zi Notes 3 Sg E C Valve position in stand by 0 0 100 91 218 0 25 1 100 opening C start
23. only for pLAN EVD connected to a pCO stop end of control with the closing of the valve corresponds to the end of temperature control of the refrigeration unit unit OFF e valve motor error recognition see paragraph 9 5 tuning in progress see paragraph 5 3 Forced closing Forced closing is performed after the driver 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 Parametro description Def Min Max UOM VALVE EEV closing steps 500 0 9999 step Tab 6 j The valve is closed in the event of power failures with 24 Vac power supply when the EVD0000UCO module is connected In this case the parameter Forced valve closing not completed visible only on the supervisor is forced to 1 If when restarting forced closing of the valve was not successful 1 the Master programmable controller checks the value of the parameter and if this is equal to 1 decides the best strategy to implement based on the application 2 the driver on restart positions the valve as explained in the paragraph Pre positioning start control The parameter is reset to 0 zero b
24. opening the valve rather than closing it This unction is recommended rather than the HiTcond protection function described previously in refrigerant circuits without a liquid receiver and where the condenser is smaller than the evaporator e g air to water heat pumps In this case in fact closing the valve would obstruct the flow of refrigerant to the condenser that lacking sufficient volume for he refrigerant to accumulate would cause an increase in condensing pressure This function is especially useful for condensers in CO cascade systems See the chapter on Protectors Key CP__ Compressor EEV Electronic expansion valve C Condenser V Solenoid valve F Filter drier E Evaporator S Liquid gauge P Pressure probe transducer T Temperature probe For the wiring see paragraph 2 11 General connection diagram EVD evolution 0300005EN rel 3 3 25 01 2013 6 1 Power supply mode EVD evolution can be powered at 24 Vac or 24 Vdc In the event of direct current power supply after completing the commissioning procedure to start control set Power supply mode parameter 1 Parameter Description Def Min Max UOM ADVANCED Power supply mode 0 0 1 0 24 Vac 1 24Vdc Tab 6 a A Important with direct current power supply in the event of power failures emergency closing of the valve is not performed even if the EVD0000UCO module is connected 6 2
25. probe does not measure correct values Check that the pressure and the temperature measured are correct and that the probe position is correct Check that the minimum and maximum pressure parameters for the pressure transducer set on the driver correspond to the range of the pressure probe installed Check the correct probe electrical connections The type of refrigerant set is incorrect Check and correct the type of refrigerant parameter Liquid returns to the 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 itto 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 integration time Initially set the threshold 3 C below the superheat set point with an integration time of 3 4 seconds Th
26. refrigerant valve pressure probe S1 main regulation check that the electrical connections are correct if the configuration is correct exit the procedure otherwise choose NO and return to step 2 Configurtion End configuration fe 0 i Prg sce y POS At the end of the configuration procedure the controller activates the valve motor error recognition procedure showing INIT on the display See paragraph 9 5 To simplify commissioning and avoid possible malfunctions the driver will not start until the following have been configured network address refrigerant valve pressure probe S1 type of main control that is the type of unit the superheat control is applied to Note to exit the guided commissioning procedure press the DOWN button repeatedly and finally confirm that configuration has been completed The guided procedure CANNOT be ended by pressing Esc if the configuration procedure ends with a configuration error access Service parameter programming mode and modify the value of the parameter in question if the valve and or the pressure probe used are not available in the list select any model and end the procedure Then the driver will be enabled for control and it will be possible to enter Manufacturer programming mode and set the corresponding parameters manually Ord 079 sa A Important for 24 Vdc power supply at the end of the guided commissioni
27. sent to a controller connected in the serial network e g pCO EVD evolution Key CP__ Compressor EEV Electronic expansion valve C Condenser V Solenoid valve L Liquid receiver E Evaporator F Filter drier PA PB_ Pressure probes S Liquid gauge TA TB_ Temperature probes For the wiring see paragraph 2 11 General connection diagram 27 The subcooling measurement uses the difference between the condensing temperature taken from the relative pressure reading and the temperature of the liquid refrigerant exiting the condenser This measurement indicates the refrigerant charge in the circuit A value near 0 K indicates possible insufficient refrigerant which may cause a decline in circuit cooling efficiency a reduction in mass flow through the expansion valve and swings in superheat control In addition it may indicate a refrigerant leak in circuits where the nominal subcooling value is known A subcooling value that is too high for example above 20 K when not required by the application may indicate excessive refrigerant charge in the circuit and can cause unusually high condensing pressure values with a consequent decline in circuit cooling efficiency and possible compressor shutdown due to the high pressure switch tripping Reverse high condensing temperature protection HiTcond on 3 The aim of reverse HiTcond protection is to limit the condensing pressure in the refrigerant circuit by
28. start up If the capacity request is less than 100 capacity control Opening Valve opening at start up Current unit cooling capacity where the current unit cooling capacity is sent to the driver via pLAN by the pCO controller If the driver is stand alone this is always equal to 100 Note this procedure is used to anticipate the movement and bring the valve 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 CAREL Wait When the calculated position has been reached regardless of the time taken this varies according to the type of valve and the objective position there is a constant 5 second delay before the actual control phase starts This is to create a reasonable interval between standby in which the variables have no meaning as there is no flow of refrigerant and the effective control phase Control The control request can be received by the closing of digital input 1 or via the network LAN The solenoid or the compressor are activated when the valve following the pre positioning procedure has reached the calculated position The following figure represents the sequence of e
29. stop phase the valve returns to standby Fig 6 f Key A Control request R__ Control S___ Standby T4 Stop position time ST Stop t Time EVD evolution 0300005EN rel 3 3 25 01 2013 CAREL 6 5 Advanced control status Unblock valve As well as normal control status the driver can have 3 special types of status This procedure is only valid when the driver is performing superheat related to specific functions control Unblock valve is an automatic safety procedure that attempts to e manual positioning this is used to interrupt control so as to move the unblock a valve that is supposedly blocked based on the control varia valve setting the desired position bles superheat valve position The unblock procedure may or may not recover physical valve position recover physical valve steps when succeed depending on the extent of the mechanical problem with the fully opened or closed valve If for 10 minutes the conditions are such as to assume the valve is unblock valve forced valve movement if the driver considers it to be blocked the procedure is run a maximum of 5 times The symptoms of blocked a blocked valve do not necessarily mean a mechanical blockage They may also represent other situations e mechanical blockage of the solenoid valve upstream of the electronic Manual positioning valve if installed Manual positioning can be activated at any time during the standby
30. tLAN CONVERTEr nn 11 2 9 Connecting the USB RS485 convetter 12 12 1 Installation siriani 49 2 10 Upload Download and Reset parameters display 12 12 2 Programming VPM irrita 49 2 11 Show electrical connections display 12 12 3 Copying the SEUD siii 50 2 12 General connection diagram 12 12 4 Setting the default Para meters 50 12 5 Updating the driver and display fifmWAare n 50 3 USERINTERFACE 3 3 1 Assembling the display board ACCESSOrY 13 32 Display ANd KOYPAG iisissscadsssccadsusscassgtecsbcetossseaionstsinseibinscssiozacasioase 13 3 3 Display mode display 14 3 4 Programming mode display sssoessesssessssesssssssesssssssssseessssseeseseee 14 4 COMMISSIONING 15 4 Commissionng ae 15 4 2 Guided commissioning procedure display 4 3 Auxiliary refrigerant wal 4 4 Checks after commissioning del 45 Oer UNOS iniia 17 5 CONTROL 18 5 1 Main and auxiliary Control ssssssssssssssssesssssesssssssessssssessssesnseseeen 18 52 SUPECMCALCONTtol 3 cciiiiiiiiaiiaa 18 5 3 Adaptive control and autotuning ssssssessssessssesssessessseensetesseteee 19 5 4 Control with Emerson Climate Digital Scroll compressor 20 5 5 BLDC Control with COMPLESSOT iii 21 5 6 Superheat regulation with 2 temperature prob
31. terminals e serial card incorporated in the driver based on the model tLAN pLAN RS485 Modbus compatibility with various types of valves universal models only and refrigerants e activation deactivation of control via digital input 1 or remote control via LAN from pCO programmable controller superheat control with protection functions for low superheat MOP LOP high condensing temperature e adaptive superheat control e function to optimise superheat control for air conditioning units fitted with Emerson Climate Digital Scroll compressor In this case EVD Evolution must be connected to a CAREL pCO series controller 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 or by PlantVisor PlantVisorPro supervisor and pCO programmable controller commissioning simplified by display with guided procedure for setting the parameters and checking the electrical connections e multi language graphic display with help function on various parameters management of different units of measure metric imperial parameters protected by password accessible at a service installer and manufacturer level copy the configuration parameters from one driver to another using the removable display e ratiometric or electronic
32. the safety of the unit is ensured through activation of the protectors If these are activated the procedure is interrupted e 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 saved Autotuning EVD evolution 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 ADVANCED Force manual tuning 0 no 1 yes_ 0 0 1 Tab 5 f The activation status of the procedure is indicated on the standard display by the message TUN at the top right Surriscaldam The optimisation procedure can only be performed if the driver is in control status and lasts from 10 to 40 minutes performing specific movements of the valve and measurements of the control variables Note e during the function maintenance of the superheat set point is no
33. the timeout the protector control variable returns back inside the corresponding threshold no alarm will be signalled Note this is a likely event as during the timeout the protection function will have an effect If the timeout relating to the control alarms is set to 0 s the alarm is disabled The protectors are still active however The alarms are reset automatically Low suction temperature alarm The low suction temperature alarm is not linked to any protection function It features a threshold and a timeout 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 timeout is set to 0 s the alarm is disabled The alarm is reset automatically with a fixed differential of 3 C above the activation threshold Relay activation for control alarms As mentioned in the paragraph on the configuration of the relay in the event of LowSH MOP High Tcond and low suction temperature alarms the driver relay will open both when configur
34. the value of the ime Td derivative time Parameter description Def Min Max UOM CONTROL Superheat set point 11 LowSH t hold 180 320 K F PID proport gain 15 0 800 PID integration time 150 0 1000 s PID derivative time 5 0 800 s Tab 5 c 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 will be automatically set for each application EVD evolution 0300005EN rel 3 3 25 01 2013 CAREL Protector 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 superh K F set point LowSH protection integration 15 0 800 S ime LOP protection threshold 50 60 76 MOP th C F reshold LOP protection integration time 0 0 800 s OP protection threshold 50 LOP thre 200 392 C F shold OP protection integration time 20 0 800 S ADVANCED High Tcond threshold 80 60 76 200 392 C F High Tcond integration time 20 0 800 s Tab 5 d 5 3 Adaptive control and
35. to the electrical panel earth the use of the driver for the superheat control requires the use of the evaporation pressure probe S1 and the suction temperature probe S2 which will be fitted after the evaporator and digital input 1 2 to enable control As an alternative to digital input 1 2 control can be enabled via remote signal tLAN pLAN RS485 For the positioning of the probes relating to other applications see the chapter on Control e inputs S1 S2 are programmable and the connection to the terminals depends on the setting of the parameters See the chapters on Commissioning and Functions pressure probe S1 in the diagram is ratiometric See the general connection diagram for the other electronic probes 4 to 20 mA or combined four probes are needed for superheat control with BLDC compressors two to measure the superheat and two to measure the discharge superheat and the discharge temperature See chap 5 EVD evolution 0300005EN rel 3 3 25 01 2013 Installation For installation proceed as follows with reference to the wiring diagrams 1 connect the probes the probes can be installed a maximum distance of 10 metres away from the driver or a maximum of 30 metres as long as shielded cables with a minimum cross section of 1 mm are used 2 connect any digital inputs maximum length 30 m 3 connect the power cable to the valve motors use 4 wire shielded cable AWG 22 Lmax 10 m or AWG
36. to zero if the EVBAT module accessory has been connected guaranteeing the power required to close the valve Fig 9 a Table of alarms Type of alarm _ Cause of alarm LED Display Relay Reset Effect on control Checks solutions Probe S1 Probe S1 faulty red alarm ALARM flashing Depends on automatic Depends on pa Check the probe connections Check or exceeded se LED configuration rameter S1 probe the S1 probe alarm manag and S1 alarm range parameter alarm manag alarm MIN amp MAX pressure parame ers Probe S2 Probe S82 faulty red alarm ALARM flashing Depends on automatic Depends on pa Check the probe connections Check or exceeded se LED configuration rameter S2 probe the S2 probe alarm manag and alarm range parameter alarm manag S2 alarm MIN amp MAX temperature parameters Probe S3 Probe S3 faulty red alarm ALARM flashing Depends on automatic Depends on pa Check the probe connections Check or exceeded se LED configuration rameter 53 probe the S3 probe alarm manag and S3 alarm range parameter alarm manag alarm MIN amp MAX pressure parame ers Probe S4 Probe S4 faulty red alarm ALARM flashing Depends on automatic Depends on pa Check the probe connections Check or exceeded se LED configuration rameter S4 probe
37. up delay after defrost 0 0 60 min _ 40 167 A_ Pre position time 6 0 18000 S 90 217 A_ Hot gas bypass temperature set point 0 60 76 200 392 C F A 28 27 A_ Hot gas bypass pressure set point 3 20 290 200 2900 barg psig A 62 61 A_ EPR pressure set point 3 5 20 290 200 2900 barg psig A 29 28 C_ PID proportional gain 5 0 800 A 48 47 C_ PID integral time 50 0 1000 G 38 165 C_ PID derivative time 5 0 800 S A 49 48 A LowSH protection threshold 5 40 72 superheat set K F A 56 55 point C_ LowSH protection integral time 5 0 800 S A 55 54 A LOP protection threshold 50 60 76 MOP protec C F A 52 51 tion threshold C_ LOP protection integral time 0 0 800 S A_ 51 50 A MOP protection threshold 50 LOP protection 200 392 C F A 54 53 threshold C_ MOP protection integral time 20 0 800 S A 53 52 A_ Enable manual valve position 0 0 1 D 24 23 A_ Manual valve position 0 0 9999 step 39 166 C_ Discharge superheat setpoint 35 40 72 180 324 K F A 100 99 C Discharge temperature setpoint 105 60 76 200 392 C F A 101 100 ADVANCED A_ High Tcond threshold 80 60 76 200 392 C F A 58 57 C_ High Tcond integral time 20 0 800 S A 57 56 A_ Modul thermost setpoint 0 60 76 200 392 CHR A 61 60 A Modul thermost differential 0 1 0 1 0 2 100 180 C CR A 60 59 C Modul thermost SHset offset 0 0 0 100 180 K
38. 1 2013 Fig 12 f Note the program On line help can be accessed by pressing F1 12 3 Copying the setup On the Configure device page once the new project has been created to transfer the list of configuration parameters to another driver read the list of parameters from the source driver with the Read command remove the connector from the service serial port connect the connector to the service port on the destination driver e write the list of parameters to the destination driver 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 driver during the write procedure the LEDs on the converter will flash The driver parameters driver will now have the default settings 12 5 Updating the driver and display firmware The driver 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 5 for the connection diagram The firmware can be downloaded from htt
39. 161 C_ EEV opening synchroniz 1 0 1 D 20 19 C_ EEV closing synchroniz 1 0 1 D 21 20 Tab 8 a User A Service installer C Manufacturer Type of variable A analogue D digital I integer EVD evolution 0300005EN rel 3 3 25 01 2013 8 1 Unitof measure In the configuration parameters menu with access by manufacturer password the user can choose the unit of measure for the driver e international system C K barg e imperial system F psig A Important the drivers EVD evolution pLAN code EVD000E1 and EVD0000E4 connected in pLAN to a pCO controller do not manage the change of the unit of measure Note the unit of measure K relate to degrees Kelvin adopted for measuring the superheat and the related parameters When changing the unit of measure all the values of the parameters saved on the driver and all the measurements read by the probes will be recalculated This means that when changing the units of measure control remains unaltered Example 1 The pressure read is 100 barg this will be immediately converted to the corresponding value of 1450 psig Example 2 The superheat set point parameter set to 10 K will be immediately converted to the corresponding value of 18 F Example 3 The S4 alarm MAX temp parameter set to 150 C will be immediately converted to the corresponding value of 302 F Note due to limits in the internal arithmeti
40. 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 e 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 driver 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 e EVD EVO is a control to be incorporated in the end equipment do not use for flush mount DIN VDE 0100 Protective separation between SELV circuit and other circuits must be guaranteed The requirements according to DIN VDE 0100 must be fulfilled To prevent infringement of the protective separation between SELV circuit to other circuits an additional fixing has to be provided near to the terminals This additional fixing shall clamp the insulation and not the conductor CAREL 2 5 Valve operation in parallel and complementary mode EVD evolution can control two CAREL valves connected together see paragraph 4 2 in parallel mode with iden
41. 4 to 20 mA pressure transducer the latter can be shared between up to 5 drivers useful for multiplexed applications e possibility to use S3 and S4 as backup probes in the event of faults on the main probes S1 and S2 4 to 20 mA or 0 to 10 Vdc input to use the driver as a positioner controlled by an external signal management of power failures with valve closing only for drivers with 24 Vac power supply and connected to the EVDOOQQOUCO accessory advanced alarm management EVD evolution 0300005EN rel 3 3 25 01 2013 For software versions higher than 4 0 the following new functions have been introduced e 24Vac or 24 Vdc power supply in the latter case without valve closing in the event of power failures pre position time settable by parameter use of digital to start stop control when there is no communication with the pCO programmable controller e possibility to control the electronic expansion valve in a refrigerant circuit with brushless DC motor BLDC compressor controlled by CAREL Power speed drive with inverter New functions have been introduced with software revision 5 0 and higher management of new refrigerants possibility to manage CO cascade systems setting the refrigerant on the primary circuit and on the secondary circuit high condensing temperature protection Reverse HiTcond for CO cascade systems subcooling measurement e valve position in standby settable
42. 7 6 R CO gas cooler pressure set point 0 20 290 200 2900 A 8 7 R 4 20 MA input value 4 4 20 A 9 8 R 0 10 V input value 0 0 10 A 20 9 R Control set point 0 60 870 200 2900 A 21 20 R Driver firmware version 0 0 10 A 25 24 R MOP MOP protection suction temperature threshold S2 30 60 76 200 392 A 02 01 R W Discharge superheat 0 40 72 180 324 A 04 03 R Discharge temperature 0 60 76 200 392 A 05 04 R Thermal time constant NTC probe S4 50 1 800 A 06 05 RAW MOP High evaporation temperature threshold 50 LOP threshold 200 392 A 07 06 R W Condensation pressure for subcooling measure 0 20 290 200 2900 A 08 07 R Condensation bubble point 0 60 76 200 392 A 09 08 R Condensation liquid temperature 0 60 76 200 392 A 0 09 R Subcooling 0 40 72 180 324 A 1 10 R Valve position 0 0 9999 4 31 R Current cooling capacity 0 0 100 7 34 R W Extended measured probe S1 0 2000 2901 20000 29007 83 210 R Extended measured probe S3 0 2000 2901 20000 29007 84 201 R Valve emergency closing speed 150 1 2000 86 213 R W Control mode BLDC comp 1 1 3 89 216 R W Type of unit for serial comm 0 0 32767 94 221 R HW code for serial comm 0 0 32767 95 222 R LowSH protection status 0 0 D 50 49 R LOP protection status 0 0 D 5 50 R MOP protection status 0 0 D 52 51 R HiTCond protection status 0 0 D 53 52 R Low suction temperature 0 0 D 1 0 R LAN error 0 0 D 2 1 R u EEPROM damaged 0 0 D 3 2 R ProbeS 0 0 D 4 3 R S P
43. A_ DI1 configuration Regulation 85 212 1 Disabled start stop 2 Valve regulation optimization after defrost tLAN RS485 3 Discharged battery alarm management Regulation 4 Valve forced open at 100 backup 5 Regulation start stop pLAN 6 Regulation backup 7 Regulation security C_ Language Italian English Italian C Auxiliary refrigerant 0 96 223 0 same as main regulation 1 R22 2 R134a 3 R404A 4 R407C 5 R410A 6 R507A 7 R290 8 R600 9 R600a 10 R717 11 R744 12 R728 13 R1270 14 R417A 15 R422D 16 R413A 17 R422A 18 R423A 19 R407A 20 R427A 21 R245FA 22 R407F 23 R32 24 HTRO1 25 HTRO2 PROBES C S1 calibration offset 0 60 870 60 160 870 60 barg psig A 34 33 mA C S1 calibrat gain on 4 20 mA 1 20 20 A 36 35 C S1 pressure MINIMUM value 1 20 290 S1 pressure barg psig A 32 31 MAXIMUM value C S1 pressure MAXIMUM value 93 S1 pressure MI 200 2900 barg psig A 30 29 NIMUM value C S1 alarm MIN pressure 1 20 290 S1 alarm MAX barg psig A 39 38 pressure C S1 alarm MAX pressure 93 S1 alarm MIN 200 2900 barg psig A 37 36 pressure C S2 calibration offset 0 20 36 20 20 36 20 C F volt A 41 40 C S2 alarm MIN temperat 50 60 S2 alarm MAX C F A 46 45 temp C S2 alarm MAX temperat 105 S2 alarm MIN 200 392 C F A 44 43 temp C S3 calibrat offset 0 60 870 60 870 barg psig A 35 34 C S3 calibration gain
44. EVD evolution CAR L electronic expansion valve driver Eve User manual LEGGI E CONSERVA gt QUESTE ISTRUZIONI READ AND SAVE THESE INSTRUCTIONS pz NO POWER I amp SIGNAL aw CABLES V TOGETHER READ CAREFULLY IN THE TEXT Integrated Control Solutions amp Energy Savings CAREL WARNINGS CAREL bases the development of its products on decades of experience in HVAC on the continuous investments in technological innovations to products procedures and strict quality processes with in circuit and functional testing on 100 of its products and on the most innovative production technology available on the market CAREL and its subsidiaries nonetheless cannot guarantee that all the aspects of the product and the software included with the product respond to the requirements of the fina application despite the product being developed according to start of the art techniques The customer manufacturer developer or installer of the fina 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 fina installation and or equipment CAREL may based on specific agreements acts as a consultant for the positive commissioning of the final unit application however in no case does it accept liability for the correct operation of the fina equipment system The CAREL product is a state of the art product whose operation
45. Electronic OUT 4 to 20mA 1 to 9 3 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 21 1 to 12 8 barg 22 0 to 20 7 barg 23 1 86 to 43 0 barg Tab 4 g A Important in case two pressure probes are installed S1 and S3 they must be of the same type It is not allowed to use a ratiometric probe and an electronic one Note in the case of multiplexed systems where the same pressure probe is shared between multiple drivers choose the normal option for the first driver and the remote option for the remaining drivers The same pressure transducer can be shared between a maximum of 5 drivers Example to use the same pressure probe 0 5 to 7 bars for 3 drivers For the first driver select 0 5 to 7 barg For the second and third driver select remote 0 5 to 7 barg See paragraph 2 6 Note the range of measurement by default is always in bar gauge barg n the manufacturer menu the parameters corresponding to the range of measurement and the alarms can be customised if the probe use
46. H SER i ETS I I I I I I I I po EVD if i i al I ULTRACAP I 1 I I T i I 207 i i I I i I i G G oe EEE I 1230 Vac C0 F I 1 l 35VA 2A 288 i gt i TRADRFE240 Ee g ee ee I 3 CT ine i I I I i 230Vac 24Vac sf f A ol 5 28 pco ue 20VA os z 6 2 E EA LAN rey td 2 shield CASE 2 230 Vac power 8 pco supply without EVDCNVOOEO a GIAN oss emergency LI i shield module SESIA D 2 n rr i 6 pco Modbus o eass shield EVD0000E0 tLAN version EVD0000E1 pLAN version i EVDOO00E2 RS485 version g CVSTDUMORO SBERAR AAG cndowe GND wrx ou OIP ETELE gewe oif x Gia se Fig 2 0 Key 1 green 0 digital input 1 configured to enable A Connection to EVDO000UCO 2 yellow control B Connection to electronic pressure probe SPK 0000 or piezoresisti 3_ brown 1 free contact up to 230 Vac ve pressure transducer SPKT00 C0 4 white 2 solenoid valve E Connection as positioner 0 to 10 Vdc input 5 configuration computer 3 alarm signal D Connection as positioner 4 to 20 mA input 6 USB tLAN converter 4 red E Connection to combined pressure temperature probe SPKP00 T0 7_ adapter 5 black F Connection to backup probes 53 54 8 ratiometric pressure 6 blue G Ratiometric pressure transducer connections SPKTOO RO transducer 7 configuration supervision com H Connections o other types of valves 9 _ NTC probe puter A The maximum le
47. Min Max UOM 3 mi 8 Notes 3 a CONFIGURATION A Network address pLAN 30 1 207 11 138 others 198 A Refrigerant R404A i 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 21 R245FA 22 R407F 23 R32 24 HTRO1 25 HTRO2 A Valve CAREL E V 14 141 1 CAREL EV 2 Alco EX4 3 Alco EX5 4 Alco EX6 5 Alco EX7 6 Alco EX8 330Hz consigliata CAREL 7 Alco EX8 500Hz specifica Alco 8 Sporlan SEI 0 5 11 9 Sporlan SER 1 5 20 0 Sporlan SEI 30 1 Sporlan SEI 50 2 Sporlan SEH 100 3 Sporlan SEH 175 4 Danfoss ETS 12 5 25B 5 Danfoss ETS 50B 6 Danfoss ETS 100B 7 Danfoss ETS 250 8 Danfoss ETS 400 9 Two CAREL E V connected together 20 Sporlan SER I G J K 21 Danfoss CCM 10 20 30 22 Danfoss CCM 40 A Probe S1 Ratiometric 1 16 143 to 9 3 barg Ratiometric OUT 0 to 5 V Electronic OUT 4 to 20 mA 1 1 4 2 barg 8 0 5 7 barg 2 0 4 9 3 barg 9 0 10 barg 3 1 9 3 barg 0 0 18 2 bar 4 0 17 3 barg 1 0 25 barg 5 0 85 34 2 barg 2 0 30 barg 6 0 34 5 barg 3 0 44 8 barg 7 0 45 barg 4 remote 0 5 7 barg 5 remote 0 10 barg 6 remote 0 18 2 barg 7 remote 0 25 barg 8 remote 0 30 barg 9 remote 0 44 8 barg 20 4 20 mA external signal A Main control Multiplexed 15 142 1 Centralized cabinet cold room ca
48. PlantVisorPRO supervisor via RS485 Modbus In this case On Off control is performed via digital input 1 or 2 if suitably configured As well as control start stop digital inputs 1 and 2 can be configured for the following optimised valve control after defrost Valve forced open 100 control backup control safety The second digital input is available for optimised defrost management Another possibility involves operation as a simple positioner with 4 to 20 mA or 0 to 10 Vdc analogue input signal EVD evolution 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 refrigerant valve pressure probe type of main control chiller showcase etc The procedure can also be used to check that the probe 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 driver or alternatively kept in place to display the significant system variables any alarms and when necessary set the control parameters The driver 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 the installation procedur
49. T 50KO at 25 C NTCO HTOO 0T120 C 150 C per 3000 h NTC built in SPKP TO 40T120 C Tab 6 c A Important in case of NTC built in probe select also the parameter relevant to the corresponding ratiometric pressure probe EVD evolution 0300005EN rel 3 3 25 01 2013 28 CAREL 6 FUNCTIONS Parameter description Def CONFIGURATION Probe 2 CAREL NTC CAREL NTC HT high T NTC built in SPKP TO 0 10 V external signal Probe S4 CAREL NTC CAREL NTC HT high T NTC built in SPKP T CAREL NTC CAREL NTC So Tab 6 d Input S3 The auxiliary probe S3 is associated with the high condensing temperature protection or can be used as a backup probe for the main probe S1 If the probe being used is not included in the list select any 0 to 5 V ratiometric or electronic 4 to 20 mA probe and then manually modify the minimum and maximum measurement in the manufacturer parameters corresponding to the probes Important probes S1 and S3 must be the same type e probes S3 and S4 are shown as NOT USED if the auxiliary control parameter is set as disabled If auxiliary control has any other setting the manufacturer setting for the probe used will be shown which can be selected according to the type Auxiliary control Variable displayed High condensing temperature protection 53 Modulating thermostat S4 Backup probes S3 S4 Subcooling measurement S3 S4
50. an be created making the changes and then connecting later on to transfer the configuration OFFLINE mode Enter at the Service WPM or Manufacturer level 7 IRTTTTE lt I AJ select Device model and enter the corresponding code ee Seleziona origine Lista Parametri Chiave E2pROM Rs485 connettore posteriore tLAN connettore frontale Modello dispositivo f Cerca per famiglia Famigha MPX Pro Modello Codice Cerca per codice Codice Fig 12 a Fig 12 d Then the user can choose to go to Configure device the list of parameters will be displayed 4 directly access to the list of parameters for the EVD evolution allowing the changes relating to the application to be made saved to EEPROM select tLAN z This is done in real time ONLINE mode at the top right set the network as a address 198 and choose the guided recognition procedure for the USB i es ie e communication port Enter at the Service or Manufacturer level i CELEECELELEELELC ewer i i Fig 12 e At the end of the configuration to save the project choose the following command used to save the configuration as a file with the hex extension Fig 12 b File gt Save parameter list To transfer the parameters to the driver choose the Write command During the write procedure the 2 LEDs on the converter will flash 49 EVD evolution 0300005EN rel 3 3 25 0
51. as alarm relay output See the chapter on Alarms solenoid valve control e electronic expansion valve status signal relay The relay contact is only open if the valve is closed opening 0 As soon as control starts opening gt 0 with hysteresis the relay contact is closed Parameter description Def CONFIGURATION Relay configuration 1 Disabled 2 alarm relay opened in case of alarm 3 Sole noid valve relay open in standby 4 valve alarm relay open in standby and control alarms 5 Reversed alarm relay closed in case of alarm 6 Valve status relay open if valve is closed Alarm relay Tab 6 i EVD evolution 0300005EN rel 3 3 25 01 2013 6 4 Control status The electronic valve driver has 6 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 driver valve system The status may be as follows forced closing initialisation of the valve position when switching the instrument on e standby no temperature control unit OFF wait opening of the valve before starting control also called pre positioning when powering the unit and in the delay after defrosting control effective control of the electronic valve unit ON positioning step change in the valve position corresponding to the start of control when the cooling capacity of the controlled unit varies
52. ata 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 driver will detect the modification and indicate the type of valve as Customised Parameter description Def CONFIGURATION Valve CAREL 1 CAREL E V PV 2 Alco EX4 3 Alco EX5 4 Alco EX6 5 Alco EX7 6 Alco EX8 330Hz suggested by CAREL 7 Alco EX8 500Hz specified by 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 EV connected together 20 Sporlan Ser I G J K 21 Danfoss CCM 10 20 30 22 Danfoss CCM 40 A Important e two CAREL E V valves connected together must be selected if two CAREL E V valves are connected to the same terminal to have parallel or complementary operation as described control is only possible with CAREL E V valves e not all CAREL valves can be connected see paragraph 2 5 Tab 4 f Pressure probe S1 Setting the type of pressure probe S1 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 17 Parameter description Def CONFIGURATION Sensor S1 Ratiom Ratiometric OUT 0 to 5V
53. ature protection on S3 probe 3 Modulating thermostat on S4 probe 4 Backup probes on S3 amp S4 5 Reserved 6 Reserved 7 Reserved 8 Subcooling measurement 9 Reverse high condensing temp protection on S3 Tab 5 b A Important the High condensing temperature protection and Modulating thermostat auxiliary settings can only be enabled if the main control is also superheat control with settings 1 to 10 and 17 18 On the other hand the Backup probes on S3 and S4 auxiliary control can be activated once the corresponding probes have been connected only for settings from 1 to 18 The following paragraphs explain all the types of control that can be set on EVD evolution 19 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 The
54. binet cold 2 Self contained cabinet cold room room 3 Perturbated cabinet control room 4 Subcritical CO cabinet cold room 5 R404A condenser for subcritical CO 6 AC or chiller with plate evaporator 7 AC or chiller with shell tube evaporator 8 AC or chiller with battery coil evaporator 9 AC or chiller with variable cooling capacity 0 AC or chiller perturbated unit 1 EPR Back pressure 2 Hot gas by pass by pressure 3 Hot gas by pass by temperature 4 transcritical CO gas cooler 5 analog positioner 4 to 20 mA 6 analog positioner 0 to10 V 7 AC chiller or cabinet cold room with adaptative regulation 8 AC or chiller with Digital Scroll compressor 9 AC chiller with BLDC compressor 20 superheat regulation with 2 temperature probes 21 1 0 expander for pCO only for controls for CAREL valves EVD evolution 0300005EN rel 3 3 25 01 2013 36 CAREL Parameter description Def Min UOM CAREL SVP Notes Modbus user Probe S2 1 CAREL NTC 3 combined NTC SPKP T0 2 CAREL NTC HT high 4 0 to 10V external signal CAREL NTC N x N Auxiliary control 1 Disabled 2 high condensing temperature protection on S3 probe 3 modulating thermostat on S4 probe 4 backup probes on 3 and S4 5 6 7 Reserved 8 Subcooling measurement 9 Inverse high condensation temperature protection on S3 probe Disabled 145 Probe S3 Ratiometric OUT 0
55. c of the driver pressure values above 200 barg 2900 psig and temperature values above 200 C 392 F cannot be converted EVD evolution 0300005EN rel 3 3 25 01 2013 40 CAREL CAREL 8 2 Variables accessible via serial connection Description Default Min Max Type CAREL SVP Modbus R W Probe S1 reading 0 20 290 200 2900 A 1 0 R Probe S2 reading 0 60 870 200 2900 A 2 1 R Probe S3 reading 0 20 290 200 2900 A 3 2 R Probe S4 reading 0 60 76 200 392 A 4 3 R Suction temperature 0 60 76 200 392 A 5 4 R Evaporation temperature 0 60 76 200 392 A 6 5 R Evaporation pressure 0 20 290 200 2900 A 7 6 R Hot gas bypass temperature 0 60 76 200 392 A 8 7 R EPR pressure back pressure 0 20 290 200 2900 A 9 8 R Superheat 0 40 72 180 324 A 0 9 R Condensing pressure 0 20 290 200 2900 A 1 0 R Condensing temperature 0 60 76 200 392 A 2 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 A 6 5 R Valve opening 0 0 100 A
56. cified in the manual do not attempt to open the device in any way other than described in the manual e donot drop hit or shake the device as the internal circuits and mechanisms may be irreparably damaged do not use corrosive chemicals solvents or aggressive detergents to clean the device 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 product portfolio CAREL adopts a policy of continual development Consequently CAREL reserves the right to make changes and improvements to any produc described in this document without prior warning The technical specifications shown in the manual may be changed withou prior warning The liability of CAREL in relation to its products is specified in the CAREL genera contract conditions available on the website www carel com and or by specific agreements with customers specifically to the extent where allowed by applicable legislation in no case will CAREL its employees or subsidiaries be liable for any lost earnings or sales losses of data and information costs o replacement goods or services damage to things or people downtime or any direct indirect incidental actual punitive exemplary special or consequentia damage of any kind whatsoever whether contractual extra contractual or due to negligence
57. ck that the driver is in stand alone mode LOP protection disabled Set a LOP integration time greater than 0 s 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 integration 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 see paragraph 5 1 Valve stuck closed Use manual control afte
58. d is not in the standard list If modifying the range of measurement the driver will detect the modification and indicate the type of probe S1 as Customised The software on the driver 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 driver automatically updates in limits of the range of measurement and the alarm limits BY default the main control probe S2 is set as CAREL NTC Other types of probes can be selected in the service menu e Unlike the pressure probes the temperature probes do not have any modifiable parameters relating to the range of measurement and consequently only the models indicated in the list can be used see the chapter on Functions and the list of parameters In any case in manufacturer programming mode the limits for the probe alarm signal can be customised EVD evolution 0300005EN rel 3 3 25 01 2013 Main control Setting the main control defines the operating mode of the driver Parameter description Def CONFIGURATIO Main control multiplexed Superheat control cabinet cold 1 multiplexed cabinet cold room room 2 cabinet cold room with on board compressor 3 perturbed cabinet cold room 4 cabinet cold room with subcritical CO 5 R404A condenser for subcritical CO2 6 air conditioner chiller with plate heat exchanger 7 air conditioner chiller with tube bu
59. d the guided configuration procedure will start e press Fig 3 b A Important the driver 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 driver EVD evolution 0300005EN rel 3 3 25 01 2013 14 CAREL 3 USER INTERFACE 3 2 Display and keypad The graphic display shows 2 system variables the control status of the driver the activation of the protectors any alarms and the status of the relay output Apertura valvola 44 Key 1 1st variable displayed 2 2nd variable displayed 3 relay status 4 alarm press HELP 5 protector activated 6 control status 7 adaptive control in progress Display writings Control status Protection active ON Operation LowSH Low superheat OFF Standby LOP Low evaporation temperature POS Positioning MOP High evaporation temperature WAIT Wait High High condensing Tcond temperature CLOSE Closing INIT Valve motor error recognition procedure TUN Tuning in progress Tab 3 b The valve motor error recognition procedure can be disabled See paragraph 9 5 Keypad Button Function Prg opens the screen for entering the password to access progra
60. e LOP and high condensing temperature protection also for CO cascade systems and can manage as an alternative to superheat control special functions such as the hot gas bypass the evaporator pressure control EPR and control of the valve downstream of the gas cooler in transcritical CO circuits In the versions for CAREL valves if integrated with a specific CAREL pCO controller via LAN the driver can control one of the following an electronic expansion valve in a refrigerant circuit with Emerson Climate Technologies Digital Scroll compressor an electronic expansion valve in a refrigerant circuit with BLDC compressor In this case the compressor must be controlled by the CAREL Power speed drive with inverter this in turn connected to the pCO controller The EVD evolution driver can control 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 Together with superheat control it can manage an auxiliary control function selected between condensing temperature protection and modulating thermostat As regards network connectivity the driver can be connected to either of the following a pCO programmable controller to manage the controller via pLAN tLAN and RS485 Modbus a
61. e be managed as described above by computer using the serial port see paragraph 2 8 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 EVD0000E00 EVD evolution universal tLAN EVDOOOOEO EVD evolution universal tLAN multiple pack of 10 pcs EVD0000E10 _ EVD evolution universal pLAN EVDOOOOE1 EVD evolution universal pLAN multiple pack of 10 pcs EVD0000E20 EVD evolution universal RS485 Modbus EVDOOO0E2 EVD evolution universal RS485 Modbus multiple pack of 10 pcs EVD0000E30 EVD evolution for CAREL valves tLAN EVD0000E3 EVD evolution for CAREL valves tLAN multiple pack 10 pcs EVD0000E40 _ EVD evolution for CAREL valves pLAN EVD0000E4 EVD evolution for CAREL valves pLAN multiple pack 10 pes EVD0000E50 EVD evolution for CAREL valves RS485 Modbus EVD0000E5 EVD evolution for CAREL valves RS485 Modbus multiple pack 10 pcs EVD0002E10 EVD evolution universal pLAN opto isolated EVD0002E20 EVD evolution universal RS485 Modbus opto isolated Tab 1 a The codes with multiple packages are sold without connectors available separately in code EVDCONO021 1 2 Functions and main characteristics In summary e electrical connections by plug in screw
62. e current set point according to the point of operation within the envelope superheat setpoint e discharge superheat setpoint discharge temperature setpoint Parameter Description Def _ Min Max UOM ADVANCED Superheat setpoint 11 LowSH 180 324 IK F threshold Discharge superheat setpoint 35 40 72 180 324 IK F Discharge temperature setpoint 105 60 76 200 392 C F Tab 5 j Note this control function is only available CAREL valve drivers no set point needs to be configured by the user 5 6 Superheat regulation with 2 temperature probes The functional diagram is shown below This type of control must be used with care due to the lower precision of the temperature probe compared to the probe that measures the saturated evaporation pressure Parameter Description Def CONFIGURATION Main control multiplexed showcase cold T room superheat regulation with 2 temperature probes Tab 5 k CAREL For the wiring see paragraph 2 11 General connection diagram This involves PID control without any protectors LowSH LOP MOP High Tcond see the chapter on Protectors without any valve unblock procedure and without auxiliary control Control is performed on the pressure probe value read by input S1 compared to the set point EPR pressure set point Control is direct as the pressure increases the valve opens and vice versa
63. e manufacturer parameters The options are 9 3 Probe alarms no action control continues but the correct measurement of the variables is not guaranteed The probe alarms are part ofthe system alarms When the value measured forced closing of the valve control stopped by one of the probes is outside of the field defined by the parameters valve forced to the initial position control stopped corresponding to the alarm limits an alarm is activated The limits can be use the backup probe valid only for probe 1 and 2 alarms control set independently of the range of measurement Consequently the field continues outside of which the alarm is signalled can be restricted to ensure greater safety of the controlled unit EVD evolution 0300005EN rel 3 3 25 01 2013 44 CAREL Parameter description Def Parameter description Def Min Max UOM CONFIGURATION CONTROL S1 probe alarm manag Valve at fixed position LowSH protection threshold 5 40 72 superheat K F No action set point 2 Valve forced closed LowSH protection integration time 15 0 800 3 Valve at fixed position LOP protection threshold 50 60 76 IMOPthre C F 4 Use backup probe S3 DARE shold S2 probe alarm manag Valve at fixed position LOP protection integration time 0 0 800 Noactian OP protect
64. e relay contact is SUA EM EMOTES RIDOS closed and is open only in standby There is no change in the event Parameter description Def Min Max UOM of alarms PROBESs solenoid valve relay alarm during normal operation the relay S1 alarm pressure 1 20 290 S1_AL_MAX barg psig contact is closed and opens in standby and or for LowSH MOP High SI_AL MI Tcond and low suction temperature alarms This is because following S1 alarm MAX pressure 93 ST_AL_ 200 2900 barg psig such alarms the user may want to protect the unit by stopping the S1_AL_MAX flow of refrigerant or switching off the compressor 52 alarm temp RE 60 52_AL_MAX ee The LOP alarm is excluded as in the event of low evaporation temperature SAL Di temp 105 ISD A 200 392 PCF closing the solenoid valve would worsen the situation S2_AL_MAX i a Parameter description Def nie eae di 53_AL_MAX barg psig Relay configuration Alarm S3 alarm MAX pressure 93 IS3_AL 200 2900 barg psig 1 Disabled relay 53_AL_MAY 2 alarm relay opened in case of alarm sgala temp 50 60 S4 AL MAX CPF 3 Solenoid valve relay open in standby S4_AL_MIN Ea 4 valve alarm relay opened in stand by and control alarms S4 alarm MAX temp 105 S4_AL_ 200 392 C CF 5 Reversed alarm relay closed in case of alarm S4_AL_MAX 6 Valve status relay open if valve is closed Tab 9 f Tab 9 e The behaviour of the driver in response to probe alarms can be configured using th
65. e temperature the cooling capacity must also increase and so the valve must close CP_ Compressor V1_ Solenoid valve C___ Condenser V2_ Thermostatic expansion valve L Liquid receiver EV_ Electronic valve F__ Dewatering filter E __ Evaporator S Liquid indicator For the wiring see paragraph 2 11 General connection diagram This involves PID control without any protectors LowSH LOP MOP High Tcond see the chapter on Protectors without any valve unblock procedure and without auxiliary control Control is performed on the hot gas bypass temperature probe value read by input S2 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 temp set point 10 60 76 200 392 C F PID proportional gain 15 0 800 PID integration time 150 JO 1000 S PID derivative time 5 0 800 S Tab 5 0 Another application that exploits this control function uses the connection of two EXV valves together to simulate the effect of a three way valve called reheating To control humidity valve EV_1 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
66. eat control is interrupted to allow the pressure to be controlled and the valve closes slowly trying to limit the evaporation temperature EVD evolution 0300005EN rel 3 3 25 01 2013 34 CAREL 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 The integration time indicates the intensity of the action the lower the value the more intense the action T_EVAP MOP_TH MOP_TH 1H T 7 N ON MOP OFF ON PID OFF ALARM OFF i DI t lt gt Fig 7 c Key T_EVAP Evaporation temperature MOP_TH MOP threshold PID PID superheat control ALARM Alarm MOP MOP protection t Time D Alarm timeout A Important the MOP threshold must be greater than the rated evaporation temperature of the unit otherwise it would be activated unnecessarily The MOP threshold is often supplied by the manufacturer of the compressor It is usually between 10 C and 15 C If the closing of the valve also causes an excessive increase in the suction temperature 52 above the set threshold only set via supervisor PlantVisor pCO VPM not on the display the valve will be stopped to prevent overheating the compressor windings awaiting a reduction in the refrigerant charge If the MOP prot
67. ection function is disabled by setting the integral time to zero the maximum suction temperature control is also deactivated Parameter description Def Min Max UOM CONTROL MOP protection suction temperature 30 60 72 200 392 C F threshold Tab 7 e At the end of the MOP protection function superheat regulation restarts in a controlled manner to prevent the evaporation temperature from exceeding the threshold again High Tcond high condensing temperature To activate the high condensing temperature protector High Tcond a pressure probe must be connected to input S3 The protector is activated so as to prevent too high evaporation temperatures from stopping the compressor due to the activation of the high pressure switch Parameter description Def Min Max UOM ADVANCED High Tcond threshold 80 60 200 C CF 76 _ 392 High Tcond integration time 20 0 800 s ALARM CONFIGURATION High condensing temperature alarm 600 0 18000 s timeout High Tcond 0 alarm DISABLED Tab 7 f CAREL The integration time is set automatically based on the type of main control O Note the protector is very useful in units with compressors on board if the air cooled condenser is undersized or dirty malfunctioning in the more critical operating conditions high outside temperature e the protector has no purpose in multiplexed systems showcases whe
68. ed 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 45 9 5 EEV motor alarm At the end of the commissioning procedure and whenever the driver is powered up the valve motor error recognition procedure is activated This preceded the forced closing procedure and lasts around 10 s The valve is kept stationary to allow any valve motor faults or missing or incorrect connections to be detected In any of these cases the corresponding alarm is activated with automatic reset The driver 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 driver forced closing of the valve is performed immediately Important after having resolved the problem with the motor it is recommended to switch the driver 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 regulation will not be guaranteed until the next synchronisation 9 6 LANerror alarm Note in the event of LAN error a parameter can be set to disable Manual positioning If the connection to the LAN network is offline for more than 6s due to an electrical problem the incorrect configuration of the net
69. en gradually lower the low superheat threshold and increase the low superheat integration time checking that there is no return of liquid in any operating conditions Stator broken or connected incorrectly Disconnect the stator from the valve and the cable and measure the resistance of the windings using an ordinary tester The resistance of both should be around 36 ohms Otherwise replace the stator Finally check the electrical connections of the cable to the driver Valve stuck open Check if the superheating is always low lt 2 C with the valve position permanently at 0 steps If so set the valve to manual control and close it completely If the superheat is always low check the electrical connections and or replace the valve The valve opening at start up parameter is too high on many cabinets in which the control set point is often reached for multiplexed cabinets 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 cabinets only The pause in control after defrosting is too short ncrease the value of the valve control delay after defrosting parameter The superheat temperature measured by the driver after defrosting and before reaching operating conditions is very low for a few minutes Check that
70. er Description Def Refrigerant Alls refrigerants not R744 Main regulation Subcooling regulation 1 10 Auxiliary refrigerant R744 The driver controls refrigerant superheat in the primary circuit A and at the same time measures the refrigerant condensing pressure in the secondary circuit B When the condensing temperature exceeds the iTCond protection threshold normal superheat control is overridden by orced opening of the valve at a rate that is inversely proportional to the iTCond protection integral time Opening the EEV lowers the superheat in the primary circuit which increases the heat exchange coefficient and consequently reduces the condensing pressure in the secondary circuit The reverse HiTcond threshold for CO cascade applications should be set in relation to the expected evaporation temperature in the primary circuit The threshold must be set to a value that is at least 3 5 C higher than the minimum evaporation temperature in the primary circuit Lower values make achieving the set pressure limit incompatible with heat exchange efficiency In addition swings in operation may occur due the attempt to limit low superheat in the primary circuit and the pressure in the secondary circuit at the same time EVD evolution 0300005EN rel 3 3 25 01 2013 CAREL 8 PARAMETERS TABLE o B 5 Parameter description Def
71. er which represents a constant that across the entire range of measurement and ca If the 0 to 10 Vdc signal coming from an exter is added to the signal n be expressed in C F nal controller on input S2 needs to be calibrated both the offset and the gain parameters can be used the latter which modifies the gradien from 0 to 10 Vdc of the line in the field A Key A offset B gain Parameter description Def Min Max UOM PROBES S1 calibration offset 0 60 870 60 870 barg psig 60 60 mA S1 calibration gain on 4 20 mA 1 20 20 S2 calibration offset 0 20 290 20 290 C F volt 20 20 S2 calibration gain 0 to 10V 1 20 20 S3 calibration offset 0 60 870 60 870 barg psig S4 calibration offset 0 20 36 120 36 C F Tab 6 9 Digital inputs The functions of digital inputs 1 and 2 can be set by parameter as shown in the table below Parameter description Def Min Max UOM CONFIGURATION DI1 configuration 1 Disabled 2 Valve regulation optimization after defrost 3 Discharged battery alarm management 4 Valve forced open at 100 5 Regulation start stop 6 Regulation backup 7 Regulation security CONTROL Start delay after defrost 10 0 60 5 6 1 min Tab 6 h Valve regulation optimization after defrost the selected digital input tells the dr
72. esS 21 57 AGVAncedTegulationi aliiciia in 22 5 8 Auxillary CONO fascio 24 6 FUNCTIONS 27 6 1 Power supply MOE sssssssssseesssssesssssesssssesesssassessstessnsseesnseseeseeees 27 62 NORWOFKCOMMECHOM scccsecsecesccencsusteccsectnetiniciectesstneenebsscbindetectnettatnentec 27 63 IMPUtS ANd OUTPUTS eccssssssssseesssssessesseesssssseesssessesssseusnaseesnseseesseseee 27 64 CONO STAU Seri mianntan aina 28 6 5 Advanced control status i 3 7 PROTECTORS 32 TI E PO EC N EE E 32 8 PARAMETERS TABLE 35 2 UNIEOFMEAS re iii 39 8 2 Variables accessible via serial connection 40 8 3 Variables used based on the type Of CONtr0l 4 5 EVD evolution 0300005EN rel 3 3 25 01 2013 CAREL 1 INTRODUCTION EVD evolution is a driver for double pole stepper motors designed to control the electronic expansion valve in refrigerant circuits It is designed for DIN rail assembly and is fitted with plug in screw terminals It 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 low evaporation pressur
73. h 2 11 General connection diagram This involves PID control without any protectors LowSH LOP MOP High Tcond see the chapter on Protectors without any valve unblock procedure and without auxiliary control Control is performed on the gas cooler pressure probe value read by input S1 with a set point depending on the gas cooler temperature read by input S2 consequently there is not a set point parameter but rather a formula CO gas cooler pressure set point Coefficient A Tgas cooler S2 Coefficient B The set point calculated will be a variable that is visible in display mode Control is direct as the pressure increases the valve opens Parameter description Def Min Max UOM ADVANCED CO regul A coefficient 3 3 100 800 CO regul B coefficient 22 7 100 800 CONTROL PID proport gain 15 0 800 PID integration time 150 0 1000 js PID derivative time 5 0 800 s Tab 5 p CAREL Analogue positioner 4 to 20 mA The valve will be positioned linearly depending on the value of the 4 to 20 MA input for analogue valve positioning read by input S1 There is no PID control nor any protection LowSH LOP MOP High Tcond see the chapter on Protectors no valve unblock procedure and no auxiliary control E EVD evolution a 100 0 mA Fig 5 k Key EV_ Electronic valve A__ Valve opening For the wiring see
74. he valve will be limited if this causes an excessive decrease in the evaporation temperature Reverse HiTcond for co cascade systems As mentioned earlier reverse high condensing temperature protection HiTcond on S3 opens the valve to limit refrigerant circuit condensing pressure by filling part of the evaporator The graph of how the function works is similar to the one shown for HiTCond protection Important opening the valve will probably also cause activation of the low superheat protection LowSH which tends to limit the opening of the valve The ratio between the integral times of these two concurrent yet opposing protectors determines how effective one is compared to the other This function is especially useful for condensers in CO cascade systems where condensation in the low temperature circuit also called secondary B takes place when evaporating the refrigerant in the medium temperature circuit primary A Key CP1 2 Compressor 1 2 EEV Electronic expansion valve CHE _ Cascade heat exchanger E Condenser L1 2 __ Liquid receiver 1 2 V Solenoid valve F1 2__ Filter drier 1 2 E Evaporator S1 2 Liquid gauge 1 2 P1 2 Pressure probe transducer TI Temperature probe V2 Thermostatic expansion valve For the wiring see paragraph 2 11 General connection diagram Note for this type of application the auxiliary refrigerant must be set as CO R744 Paramet
75. ifications 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 integration 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 Protection MOP C F 76 threshold LOP protection integration time 0 0 800 s ALARM CONFIGURATION Low evaporation temperature 300 0 18000 S alarm timeout LOP 0 alarm DISABLED Tab 7 c The integration time is set automatically based on the type of main control O Note e the LOP threshold must be lower then the rated evaporation temperature of the unit otherwise it would be activated unnecessarily and greater than the calibration of the low pressure switch otherwise it would be useless As an initial approximation it can be set to a val
76. ified design and production system as well as by the marks WARNING separate as much as possible the probe and digital input signal cables from the cables carrying inductive loads and power cables to avoid possible electromagnetic disturbance Never run power cables including the electrical panel wiring and signal cables in the same conduits NO POWER CABLES TOGETHER READ CAREFULLY IN THE TEXT EVD evolution 0300005EN rel 3 3 25 01 2013 CAREL Content 1 INTRODUCTION 7 9 ALARMS 42 Vl Models ascii ino TE AMS cioe 42 1 2 Functions and main characteristics 9 2 Alarm relay Configuration scsssssssssssssusssesussssesssssssssnsssessesenaseesee 43 9 3 Probe alates ccc ciscsscsccusscsececscneieccsstiesieetnodeuastecshcdiet sideceustnen tad 43 2i INSIALIANON ________________9 cn P 21 DIN rail assembly and dimensions sssssssssessssseessssssessssssessssssenseeeses 9 9 5 EEV motor aA iii 44 22 Description Of the terminal S susma onana 9 9 6 LAN error alarm 45 2 3 Connection diagram superheat control 9 DA Astaat Oasan 10 10 TROUBLESHOOTING _ 4 2 5 Valve operation in parallel and complementary M0de 11 11 TECHNICAL SPECIFICATIONS 48 2 6 Shared pressure Probe 11 oo C 27 Connecting the module EVBATO0400 11 12 APPENDIX VPM VISUAL PARAMETER MANAGER 49 2 8 Connecting the USB
77. imum of 5 drivers For multiplexed systems where controllers EVD evolution to EVD evolution5 share the same pressure probe choose the normal option for EVD evolution and the remote option for the other drivers up to the fifth EVD evolution6 must use another pressure probe P2 2 7 Connecting the module EVBAT00400 The EVBAT00400 module can close the valve in the event of power failures Digital input 1 2 can be configured to detect the Discharged battery alarm EVBAT00500 D Battery module AT00400 EVD evolution a i 230 0 24Vac 35VA TRADRFE240 Fig 2 2 8 Connecting the USB tLAN converter Procedure remove the LED board cover by pressing on the fastening points e 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 driver EXAMPLE EVD Evolution to EVD Evolution5 EVD Evolution6 Probe S1 0 5 to 7 barg P1 to remote 0 5 to 7 barg _ 0 5 to 7 barg P2 EVD Evolution 1 EVD Evolution 5 EVD Evolution 6 nz Key 1 service serial port amp 2 adapter 3 USB tLAN converter P2 4 personal computer O Note when using the service serial port connection the VPM program can be used to configure
78. ion threshold 50 LOP th 200 392 CLF reshold 2 Valve forced osea OP protection integration time 20 0 800 S 3 Valve at fixed position Is pes ADVANCED se backup probe High Tcond threshold 80__ 60 76 200 392 C F 53 probe alarm manag No action High Tcond integration time 20 0 800 S R Oracion ALARM CONFIGURATION 2 Valve forced closed Low superheat alarm timeout 300 0 8000 s 3 Valve at fixed position LowSH S4 probe alarm manag No action 0 alarm DISABLED No action Low evaporation temperature alarm 300 0 8000 S 2 Valve forced closed imeout LOP 3 Valve at fixed position 0 alarm DISABLED CONTROL High evaporation temperature alarm 600 0 8000 s Valve opening at start up evaporator valve 50 imeout MOP capacity ratio 0 alarm DISABLED Tab 9 g High condensing temperature alarm 600 0 8000 S imeout High Tcond 0 alarm DISABLED Low suction temperature alarm 50 60 76 1200 392 C F 9 4 Control alarms hreshold F Low suction temperature alarm 300 0 18000 S hese are alarms that are only activated during regulation im eout Tab 9 h Protector alarms The alarms corresponding to the LowSH LOP MOP and High Tcond protectors are only activated during control when the corresponding activation threshold is exceeded and only when the timeout defined by the corresponding parameter has elapsed If a protector is not enabled integration time 0 s no alarm will be signalled If before the expiry of
79. iver the current defrost status Defrost active contact closed Access Manufacturer programming mode to set the start delay after defrost Discharged battery alarm management if the selected digital input is connected to the battery charge module for EVD evolution EVBAT00400 the controller signals discharged or faulty batteries so as to generate an alarm message and warn the service technicians that maintenance is required See the connection diagram in chapter 2 Valve forced open when the digital input closes the valve opens completely 100 unconditionally When the contact opens again the valve closes and moves to the position defined by the parameter valve opening at start up for the pre position time Control can then start Regulation start stop digital input closed control active digital input open driver in standby see the paragraph Control status A Important this setting excludes activation deactivation of control via the network See the following functions e Regulation backup if there is a network connection and communication fails the driver checks the status of the digital input to determine whether control is active or in standby e Regulation security if there is a network connection before control is activated the driver must receive the control activation signal and the selected digital input must be closed If the digital input is open the driver always remains in standby 29
80. m ming mode a a HA TIS if in alarm status displays the alarm queue e in the Manufacturer level when scrolling the parameters shows the explanation screens Help Esc e exits the Programming Service Manufacturer and Display modes after setting a parameter exits without saving the changes 4 49 navigates the display screens increases decreases the value UP DOWN v switches from the display to parameter programming mode Enter confirms the value and returns to the list of parameters Tab 3 c O Note the variables displayed as standard can be selected by configuring the parameters Display main var 1 and Display main var 2 7 accordingly See the list of parameters CAREL 3 3 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 press UP DOWN the display shows a graph of the superheat the percentage of valve opening the evaporation pressure and temperature and the suction temperature variables 3 press UP DOWN the variables are shown on the display followed by the screens with the probe and valve motor electrical connections 4 press Esc to exit display mode For the complete list of the variables shown on the display see the chapter Table of paramete
81. measurement error 2 FS maximum 1 typical S4 low temperature NTC 10kQ at 25 C 50T105 C measurement error 1 C in the range 50T50 C 3 C in the range 50T90 C high temperature NTC 50kQ at 25 C 40T150 C measurement error 1 5 C in the range 20T115 C 4 C in the range outside of 20T115 C NTC built in 10kQ at 25 C 40T120 C measurement error 1 C in the range 40T50 C 3 C in the range 50T90 C Relay output normally open contact 5 A 250 Vac resistive load 2 A 250 Vac inductive load PF 0 4 Lmax 10 m VDE 1 1 A PF 0 6 Power to active probes V ver programmable output 5 Vdc 2 or 12 Vdc 10 RS485 serial connection Lmax 1000 m shielded cable LAN connection Lmax 30 m shielded cable pLAN connection Lmax 500 m shielded cable Assembly DIN rail Connectors plug in cable size 0 5 to 2 5 mm 12 to 20 AWG Dimensions LxHxW 70x110x60 Operating conditions 25T60 C don t use EVDIS under 20 C lt 90 RH non condensing Storage conditions 35T60 C don t store EVDIS under 30 C humidity 90 RH non condensing ndex of protector P20 Environmental pollution 2 normal Resistance to heat and fire Category D mmunity against voltage surges Category 1 Rated impulse voltage 2500V Type of relay action 1C microswitching Class of insulation Software class and structure A Conformi
82. module mounted on DIN rail guarantees temporary power to the driver in the event of power failures for enough time to immediately close the connected electronic valves one or two It avoids the need to install a solenoid valve The module is made using Ultracap storage capacitors which ensure reliability in terms of much longer component life than a module made with lead batteries In just 4 minutes the module is ready to power two Carel valves again or 5 minutes for pairs or other brand valves OO ee ewer wee ee EN CENL NS prppppppppppppp Fig 1 d Valve cable E2VCABS 00 IP67 Shielded cable with built in connector for connection to the valve motor The connector code E2VCON0000 IP65 can also be purchased on its own to be wired Fig 1 e CAREL 2 INSTALLATION 2 1 DIN rail assembly and dimensions EVD evolution is supplied with screen printed connectors to simplify wiring Fig 2 a 2 2 Description of the terminals ook gt g 1 A737274 SF Ss 2 Power Supply E V connection A Relay A UUUUUUUUUUU NNANANANANNNNNNNNNA Analog Digital Input Network 22 093 ZH i a S283 66 GND TWRx VRI Fig 2 b Terminal Description G G0 Power supply VBAT Emergency power supply L
83. nd or increase the integration time Note the required stability involves a variation within 0 5 bars If this is not effective or the settings cannot be changed adopt electronic valve control parameters for perturbed systems 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 The superheat does NOT swing with the valve set in manual control in the position corresponding to the average of the working values As a first approach decrease by 30 to 50 the proportional factor Subsequently try increasing the integration 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 In the start up phase with high evaporator tempe ratures the evaporation pressure is high MOP protection disabled or ineffective Activate the MOP protection by setting the threshold to the required saturated eva poration temperature high eva
84. ndle heat exchanger 8 air conditioner chiller with finned coil heat exchanger 9 air conditioner chiller with variable cooling capacity 0 perturbed air conditioner chiller Advanced control 1 EPR back pressure 2 hot gas bypass by pressure 3 hot gas bypass by temperature 4 transcritical CO tgas cooler 5 analogue positioner 4 to 20 mA 6 analogue positioner 0 to 10 V 7 air conditioner chiller or cabinet cold room with adaptive control 8 air conditioner chiller with digital scroll compressor 9 AC chiller with BLDC scroll compressor 20 superheat control with 2 temperature probes 21 I O expansion for pCO Tab 4 h CAREL valve drivers on y 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 and or S2 will be automatically set to the values recommended by CAREL based on the selected application During this initial configuration phase only superheat control mode from 1 to 10 can be set which differ based on the application chiller efrigerated cabinet etc n the event of errors in the initial configuration these parameters can ater be accessed and modified inside the service or manufacturer menu f the driver default parameters are restored RESET procedure see the chapter on Installation when next started the display will again show he
85. ned by the law de t u t K e t 7 Je dt Ty dt Key u t Valve position Ti Integration time e t Error Td Derivative time K__ Proportional gain Note that regulation is calculated as the sum of three separate contributions proportional integral and derivative e the proportional action opens or closes the valve proportionally to the variation in the superheat temperature Thus the greater the K proportional gain the higher the response speed of the valve The proportional action does not consider the superheat set point but rather only reacts to variations Therefore if the superheat value does not vary significantly the valve will essentially remain stationary and he set point cannot be reached e the 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 ower the value of T integration time the more intense the action will be The integration time in summary represents the intensity of he reaction of the valve especially when the superheat value is not near the set point the derivative action is linked to the speed of variation of the superheat value that is the gradient at which the superheat changes from instant o instant It tends to react to any sudden variations bringing forward he corrective action and its intensity depends on
86. ng procedure to start control set Power supply mode parameter 1 otherwise the valve remains in the closed position See paragraph 6 1 CAREL Network address The network address assigns to the driver an address for the serial connection to a supervisory system via RS485 and to a pCO controller via pLAN tLAN Modbus Parameter description Def Min _ Max _ UOM CONFIGURATION Network address 198 1 207 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 refrigerant is essential for calculating the superheat In addition it is used to calculate the evaporation and condensing temperature based on the reading of the pressure probe Parameter description Def CONFIGURATION Refrigerant R404A 1 R22 2 R134a 3 R404A 4 R407G 5 R410A 6 R507A 7 R290 8 R600 9 R600a 10 R717 11 R744 12 R728 13 R1270 14 R417A 15 R422D 16 R413A 17 R422A 18 R423A 19 R407A 20 R427A 21 R245Fa 22 R407F 23 R32 24 HTRO1 25 HTRO2 Tab 4 e Note for CO cascade systems at the end of the commissioning procedure also set the auxiliary refrigerant See the following paragraph Valve Setting the type of valve automatically defines all the control parameters based on the manufacturer s d
87. ngth of the connection cable to the EVDOO000UCO in combination with Alco EX7 or EX8 valves use a 35 VA transformer code TRADRFE240 N AWG 22 with Lmax 10 m AWG 14 con Lmax 50 m EVD evolution 0300005EN rel 3 3 25 01 2013 The user interface consists of 5 LEDs that display the operating status as shown in the table Fig 3 a Key LED ON OFF Flashing NET Connection available No connection Communication error OPEN Opening valve Driver disabled CLOSE Closing valve Driver disabled A oe Active alarm Driver powered Driver not powered Wrong power supply see chap Alarms Tab 3 a Awaiting completion of the initial configuration 3 1 Assembling the display board accessory The display board once installed is used to perform all the configuration and programming operations on the driver It displays the operating status the significant values for the type of control that the driver is performing e g superheat control the alarms the status of the digital inputs and the relay output Finally it can save the configuration parameters for one driver and transfer them to a second driver see the procedure for upload and download parameters For installation remove the cover pressing on the fastening points fit the display board as shown e the display will come on and if the driver is being commissione
88. not involve the superheat activating auxiliary controls that use probes 53 and or S4 and setting the suitable values 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 driver can be completely customised setting the function of each parameter If the parameters corresponding to PID control are modified the driver will detect the modification and indicate the main control as Customised CAREL 5 CONTROL 5 1 Main and auxiliary control 5 2 Superheatcontrol EVD evolution features two types of control main e auxiliary Main control is always active while auxiliary control can be activated by parameter Main control defines the operating mode of the driver The first 10 settings refer to superheat control the others are so called special settings and are pressure or temperature settings or depend on a control signal from an external controller The last advanced functions 18 19 20 also relate to superheat control Parameter description Def CONFIGURATION Main control multiplexed Superheat control cabinet 1 multiplexed cabinet cold room cold room 2 cabinet cold room with on board compressor 3 perturbed cabinet cold room 4 cabinet cold room with subcritical CO
89. nt S3 probe measurement S4 probe measurement 4 to 20 mA input value 0 to 10 Vdc input value DI1 digital input status DI2 digital input status EVD firmware version Display firmware version Adaptative regulation status 0 Not enabled or stopped 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 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 su perheat Discharge superheat Discharge temperature Digital input status 0 open 1 closed O Note the readings of probes S1 S2 S3 S4 are always displayed regardless of whether or not the probe is connected EVD evolution 0300005EN rel 3 3 25 01 2013 42 Tab 8 c CAREL 9 ALARMS 9 1 Alarms The display shows both types of alarms in two different modes e 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 t
90. o useful in multiplexed systems showcases as allows all the utilities to be enabled at the same time without causing problems of high pressure for the compressors To reduce the evaporation temperature the output of the refrigeration unit needs to be decreased This can be done by controlled closing of the electronic valve implying superheat is no longer controlled and an increase in the superheat temperature The protector will thus have a moderate reaction that tends to limit the increase in the evaporation temperature keeping it below the activation threshold while trying to stop the superheat from increasing as much as possible Normal operating conditions will not resume based on the activation of the protector but rather on the reduction in the refrigerant charge that caused the increase in temperature The system will therefore remain in the best operating conditions a little below the threshold until the load conditions change Parameter description Def Min Max UOM CONTROL OP protection threshold 50 Protection LOP 200 C F threshold 392 OP protection integration time 20 0 800 s ALARM CONFIGURATION High evaporation temperature 600 JO 18000 s alarm timeout MOP 0 alarm DISABLED Tab 7 d The integration 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 superh
91. on has been reached regardless of the time taken this varies according to the type of valve and the position there is a constant 5 second delay before the actual control phase starts Note if information is not available on the variation in unit cooling capacity this will always be considered as operating at 100 and therefore the procedure will never be used In this case the PID control must be more reactive see the chapter on Control so as to react promptly to variations in load that are not communicated to the driver NP Parameter description Def Min Max UOM CONTROL Key Start up delay after defrost 10 0 60 min A__ Control request T3_ Repositioning time Tab 6 n C Change capacity Ww Wait NP_ Repositioning t Time R__ Control A Important if the superheat temperature should fall below the set point control resumes even if the delay has not yet elapsed ON A OFF P OFF I ON TI Ww T2 t Fig 6 d Key A_ Control request Ww Wait S__ Standby T1_ Pre positioning time P__ Pre positioning T2 Start up delay after defrost R__ Control t Time Positioning change cooling capacity This control status is only valid for the pLAN driver 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
92. or electrical damage to the solenoid valve upstream of the electronic control phase Manual positioning once enabled is used to freely set valve 3 i the position of the valve using the corresponding parameter blockage of the filter upstream of the electronic valve if installed e electrical problems with the electronic valve motor Control is placed on hold all the system and control alarms are enabled elec icat p oblems in the driver valve connection cables however neither control nor the protectors can be activated Manual IMSOMESI driver valve electrical connection positioning thus has priority over any status protection of the driver electronic problems with the valve control driver secondary fluid evaporator fan pump malfunction When the driver is connected to the network for example to a pCO insufficient refrigerant in the refrigerant circuit refrigerant leaks controller in presence of an communication error LAN error manual positioning can be inhibited temporarily by the parameter and the driver recognizes the start stop regulation depending on the configura lack of subcooling in the condenser e electrical mechanical problems with the compressor tion of the digital inputs processing residues or moisture in the refrigerant circuit Parameter description Def Min Max _ UOM O Note the valve unblock procedure is nonetheless performed in CONTROL each of these cases given that it does n
93. or any other liabilities deriving from the installation use or impossibility to use the product even if CAREL or its subsidiaries are warned of the possibility of such damage DISPOSAL INFORMATION FOR USERS ON THE CORRECT HANDLING OF WASTE ELECTRICAL AND ELEC TRONIC 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 thepublicorprivatewastecollectionsystemsdefinedbylocallegislationmust 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 intheeventofillegaldisposalofelectricalandelectronicwaste 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 cert
94. 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 A ow superheat temperature in fact corresponds to a situation of probable instability due to the turbulent evaporation process approaching the measurement point of the probes The expansion valve must therefore be controlled with extreme precision and a reaction capacity around the superheat set point which will almost always vary from 3 to 14 K Set point values outside of this range are quite infrequent and relate to special applications EVD evolution Fig 5 a EVD evolution 0300005EN rel 3 3 25 01 2013 Key CP_ compressor EEV electronic expansion valve C condenser V__ solenoid valve L liquid receiver E evaporator F dewatering filter P pressure probe transducer S__ liquid indicator T__ temperature probe For the wiring see paragraph 2 7 General connection diagram Note superheat control in a refrigerant circuit with BLDC compressor requires two probes for superheat control and two probes downstream of the compressor for discharge superheat and discharge temperature control See par 5 5 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 defi
95. ot cause mechanical or control Enable manual valve position 0 0 1 problems Therefore also check these possible causes before replacing Manual valve position 0 0 9999 step the valve j Stop manual positioning on network 0 1 error 0 Normal operation 1 Stop O Note e 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 Tab 6 0 Recover physical valve position Parameter description Def Min Max UOM VALVE EEV opening synchroniz 1 0 1 EEV closing synchroniz 1 0 1 Tab 6 p This procedure is necessary as the stepper motor intrinsically tends to lose steps during movement Given that the control phase may last con tinuously for several hours it is probable that from a certain time on the estimated position sent by the valve driver 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 ce
96. otal number of active alarms There are two types of alarms system valve motor EEPROM probe and communication e control low superheat LOP MOP high condensing temperature low suction temperature The activation of the alarms depends on the setting of the threshold and PEREZ OFF activation delay timeout parameters Setting the timeout to 0 disables sa Eeprom the alarms The EEPROM unit parameters and operating parameters alarm Valvole J ALARMS danneggiata always stops control 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 Fig 9 b display board is fitted as shown in the table below control alarm next to the flashing ALARM message the main page Note the alarm LED only comes on for the system alarms and not shows the type of protector activated for the control alarms Surriscaldam DIRI Example display system alarm on LED board a E EFA Geivols TALARMZ CD EVD evolution 44 s Rele in Prg Esc OY t e Fig 9 c Note to display the alarm queue press the Help button and scroll using the UP DOWN buttons the control alarms can be disabled by setting the corresponding Note the alarm LED comes on to signal a mains power failure only timeout
97. ource driver DOWNLOAD the display copies all the values of the parameters to the target driver RESET all the parameters on the driver are restored to the default values See the table of parameters in chapter 8 gt IN Prg se 4 e Fig 2 n A Important the procedure must be carried out with driver powered e DO NOT remove the display from the driver during the UPLOAD DOWNLOAD RESET procedure the parameters cannot be downloaded if the source driver and the target driver have incompatible firmware 2 11 Show electrical connections display To display the probe and valve electrical connections for drivers A and B enter display mode See paragraph 3 3 EVD evolution 0300005EN rel 3 3 25 01 2013 12 CAREL CAREL 2 12 General connection diagram Note for the configuration of the digital inputs see par 6 3 module is 5 m The connection cable to the valve motor must be 4 wire shielded CASE 1 CASE 3 230 Vac power supply with emergency module 24 Vdc power supply iis F Pee di E I AREL E V nee eee A 2 amp j Sporlan i 1 DANFOSS i 33 EVDOO00UCO I eb veat _ SEI SE
98. p ksa carel com See the VPM On line help EVD evolution 0300005EN rel 3 3 25 01 2013 50 CAREL CAREL CAREL INDUSTRIES HeadQuarters Via dell Industria 11 35020 Brugine Padova Italy Tel 39 049 9716611 Fax 39 049 9716600 e mail carel carel com www carel com Agenzia Agency EVD evolution 0300005EN rel 3 3 25 01 2013
99. paragraph 2 11 General connection diagram Forced closing will only occur when digital input DI1 opens 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 Analogue positioner 0 to 10 Vdc The valve will be positioned linearly depending on the value of the 0 to 10 V input for analogue valve positioning read by input S1 There is no PID control nor any protection LowSH LOP MOP High Tcond no valve unblock procedure and no auxiliary control with corresponding forced closing of the valve and changeover to standby status cl il EVD evolution a 0 10 Vdc 100 0 Fig 5 1 Key EV_ Electronic valve A__ Valve opening For the wiring see paragraph 2 11 General connection diagram A Important the pre positioning and repositioning procedures are not performed Manual positioning can be enabled when control is active or in standby I O expander for pCO The EVD Evolution driver is connected to the pCO programmable controller via LAN transferring the probe readings quickly and without filtering The driver operates as a simple actuator and receives the information needed to manage the valves from the pCO Parameter Description Def CONFIGURATION Main control multiplexed showcase cold room I O expander for pCO Tab 5 q l
100. poration temperature limit for the compressors and setting the MOP integration time to a value above 0 recommended 4 seconds To make the protection more reactive decrease the MOP integration time Refrigerant charge excessive for the system or extreme transitory conditions at start up for cabinets 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 EVD evolution 0300005EN rel 3 3 25 01 2013 46 CAREL PROBLEM CAUSE SOLUTION In the start up phase the low pressure protection is activated only for self contained units 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 Che
101. r Pressure Regulator is used to set a pressure set point and the PID control parameters required to achieve this Fig 5 g Key CP_ Compressor V1_ Solenoid valve C__ Condenser V2_ Thermostatic expasnion valve L Liquid receiver EV_ Electronic valve F__ Dewatering filter E Evaporator S Liquid indicator For the wiring see paragraph 2 11 General connection diagram This involves PID control without any protectors LowSH LOP MOP High Tcond see the chapter on Protectors without any valve unblock procedure and without auxiliary control Control is performed on the hot gas bypass pressure probe value read by input S1 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 proport gain 15 O 800 7 Fig 5 f PID integration time 150 10 1000 fs Key PID derivative time 5 0 800 s V1_ Solenoid valve E Evaporator Tab 5 n V2_ Thermostatic expasnion valve EV_ Electronic valve 23 EVD evolution 0300005EN rel 3 3 25 01 2013 Hot gas bypass by temperature This control function can be used to control cooling capacity On a refrigerated cabinet if the ambient temperature probe measures an increase in th
102. r a EVD evolution pco lt x re shield Fig 5 m Key T__ Temperature probe P__ Pressure probe EV_ Electronic valve 5 8 Auxiliary control Auxiliary control can be activated at the same time as main control and uses the probes connected to inputs S3 and or S4 Parameter description Def CONFIGURATION Auxiliary control Disabled 1 Disabled 2 High condensing temperature protection on S3 probe 3 Modulating thermostat on S4 probe 4 Backup probes on S3 amp S4 5 6 7 Reserved 8 Subcooling measurement 9 Reverse high condensing temperature protection on S3 Tab 5 r For the high condensing temperature protection only available with superheat control an additional pressure probe is connected to S3 that measures the condensing pressure For the modulating thermostat function only available with superheat control an additional temperature probe is connected to S4 that measures the temperature on used to perform temperature control see the corresponding paragraph The last option available if main control 1 to 18 requires the installation of both probes S3 amp S4 the first pressure and the second temperature Note if only one backup probe is fitted under the manufacture parameters the probe thresholds and alarm management can be set separately EVD evolution 0300005EN rel 3 3 25 01 2013 HITCond protection high condensing temperatu
103. r start up to completely open the valve If the superheat remains high check the electrical connections and or replace the valve The unit switches off due to LOP protection disabled Set a LOP integration time greater than 0 s low pressure during control only for self contained units 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 integration 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 ofthe 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 closed Use manual control after start up to completely open the val
104. re The functional diagram is shown below EVD evolution CP_ Compressor EEV Electronic expansion valve C___ Condenser V__ Solenoid valve L Liquid receiver E Evaporator F Dewatering filter P Pressure probe transducer S Liquid indicator T _ Temperature probe For the wiring see paragraph 2 11 General connection diagram As already mentioned the HITCond protection can only be enabled if the controller measures the condensing pressure temperature and responds moderately by closing the valve in the event where the condensing temperature reaches excessive values to prevent the compressor from shutting down due to high pressure The condensing pressure probe must be connected to input 3 Modulating thermostat This function is used by connecting a temperature probe to input S4 to modulate the opening of the electronic valve so as to limit the owering of the temperature read and consequently reach the control set point This is useful in applications such as the multiplexed cabinets o avoid the typical swings in air temperature due to the ON OFF control thermostatic of the solenoid valve A temperature probe must be connected to input S4 located in a similar position to the one used for he traditional temperature control of the cabinet In practice the close he controlled temperature gets to the set point the more the control function decreases the cooling capacity of the evaporator by closing the
105. re the condensing pressure is maintained constant and the status of the individual electronic valves does not affect the pressure value To reduce the condensing temperature the output of the refrigeration unit needs to be decreased This can be done by controlled closing of the electronic valve implying superheat is no longer controlled and an increase in the superheat temperature The protector will thus have a moderate reaction that tends to limit the increase in the condensing temperature keeping it below the activation threshold while trying to stop the superheat from increasing as much as possible Normal operating conditions will not resume based on the activation of the protector but rather on the reduction in the outside temperature The system will therefore remain in the best operating conditions a little below the threshold until the environmental conditions change T_COND 4 T_COND_TH T_COND_TH A ON HiTcond I OFF f ON PID OFF ov ON t ALARM OFF i L i 1 gt t poit t lt gt I1 Fig 7 d Key T_COND Condensing temperature T_COND_TH High Tcond threshold High High Tcond protection status ALARM Alarm Tcond PID PID superheat control t Time D Alarm timeout Note the High Tcond threshold must be greater than the rated condensing temperature of the unit and lower then the calibration of the high pressure switch e the closing of t
106. robe S2 0 0 D 5 4 R lt Probe 3 0 0 D 6 5 R Probe S4 0 0 D 7 6 R EEV motor error 0 0 D 8 7 R Relay status 0 0 D 9 8 R O LOP low evaporation temperature 0 0 50 49 R x MOP high evaporation temperature 0 0 51 50 R Q LowSH low superheat 0 0 52 51 R amp lt HiTcond high condensing temperature 0 0 53 52 R un LOP low evaporation temperature 0 0 D 0 9 R OP high evaporation temperature 0 0 D 1 0 R S LowSH low superheat 0 0 D 2 1 R High Tcond high condensing temperature 0 0 D 3 2 R DI1 digital input status 0 0 D 4 3 R DI2 digital input status 0 0 D 5 4 R Guided initial procedure completed 0 0 D 22 21 R W z Adaptive control ineffective 0 0 D 40 39 R ains power failure 0 0 D 45 44 R Control backup from supervisor 0 0 D 46 45 R W Forced valve closing not completed 0 0 D 49 48 R W Tab 8 b The displayed variable is to be divided by 100 and allows us to appreciate the hundredth of a bar psig Type of variable A analogue D digital SVP variable address with CAREL protocol on 485 serial card l integer Modbus variable address with Modbus protocol on 485 serial card 41 EVD evolution 0300005EN rel 3 3 25 01 2013 8 3 Variables used based on the type of control Display mode and via a serial connection with VPM PlantVisorPRO Proceed as follows to display the variables press UP DOWN press the DOWN button to move to the next variable screen e press Esc to return
107. rs 3 4 Programming mode display The parameters can be modified using the front keypad Access differs according to the user level Service Installer and manufacturer Modifying the Service parameters The Service parameters as well as the parameters for commissioning the driver 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 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 parameter 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 ONAY Fig 3 e O Note if when setting a parameter the value entered is out of range this is not accepted and the parameter soon after returns to the previous value if no button is pressed after 5 min the display automatically returns to
108. rtain number of steps in the suitable direction to realign the valve when fully opened or closed Note e realignment is in intrinsic part of the forced closing procedure and is activated whenever the driver is stopped started and in the standby phase e the possibility to enable or disable the 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 EVD evolution 0300005EN rel 3 3 25 01 2013 32 CAREL 7 PROTECTORS These are additional functions that are activated in specific situations that are potentially dangerous for the unit being controlled They feature an integral action that is the action increases gradually when moving away from the activation threshold They may add to or overlap disabling normal PID superheat control By separating the management of these functions from PID control the parameters can be set separately allowing for example normal control that is less reactive yet much faster in responding when exceeding the activation limits of one of the protectors 7 1 Protectors The protectors are 5 e LowSH low superheat LOP low evaporation temperature e MOP high evaporation temperature e High Tcond high condensing temperature e Reverse HiTcond Note the HiTcond protectors require an additional probe S3 to those normally
109. s used connected to a pCO family controller the setup parameters will not need to be set and confirmed n fact the application running on the pCO will manage the correct values based on the unit controlled Consequently simply set the pLAN LAN or Modbus address for the driver as required by the application on the pCO and after a few seconds communication will commence between the two instruments and the driver automatically be enabled for control The main screen will shown on the display which can then be removed and control will be able to commence when requested by the pCO controller or digital input DI1 DI2 If there is no communication between the pCO and the driver see the paragraph LAN error alarm the driver will be able to continue control based on the status of digital input DI1 DI2 See par 6 3 EVD evolution 0300005EN rel 3 3 25 01 2013 CAREL 4 COMMISSIONING 4 2 Guided commissioning procedure display After having fitted the display Con ma tion 198 IQ Prg se b 4 at the first parameter is displayed press UP DOWN to modify the network address value press Enter to move to the value of the parameter Configurtion Network address i Prg ee y a BN N Prg ese i press Enter to confirm the value press UP DOWN to move to the next parameter refrigerant repeat steps 2 3 4 5 to modify the values of the parameters
110. 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 suction If the superheat temperature is high it means that the evaporation process is completed well before the end of the evaporator and therefore flow rate of refrigerant through the valve is insufficient This causes a reduction in cooling efficiency due to the failure to exploit part of the evaporator The valve must therefore be opened further Vice versa if the superheat temperature is low it means that the evaporation process has not concluded at the end of the evaporator and a certain quantity of liquid will still be present at the inlet to the compressor The valve must therefore be closed further The operating range of the superheat temperature is limited at the lower end if the flow rate through the valve is excessive the superheat measured will be near 0 K This indicates the presence of liquid even if the percentage of this relative to the gas cannot be quantified There is therefore un undetermined risk to the compressor that must be avoided Moreover a high superheat temperature as mentioned c
111. t guaranteed however the safety of the unit is ensured through activation of the protectors If these are activated the procedure is interrupted if due to external disturbance or in the case of particularly unstable systems the procedure cannot suitably optimise the parameters the controller will continue using the parameters saved in the memory before the procedure was started If the procedure ends successfully the resulting control parameters will be automatically saved both the tuning procedure and adaptive control can only be enabled for superheat control they cannot be used for the advanced control functions For CAREL internal use only some tuning procedure control parameters can be shown on the display supervisor pCO and VPM these must not be modified by non expert users These are Tuning method Adaptive control status Last tuning result Tuning method is visible as a parameter in the Special category the two other parameters are visible in display mode See paragraph 3 3 Parameter Description Def Min Max UoM ADVANCED Tuning method 0 0 255 Tab 5 g Note the Tuning method parameter is for use by qualified CAREL technical personnel only and must not be modified 5 4 Control with Emerson Climate Digital Scroll compressor A Important this type of control is incompatible with adaptive control and autotuning Digital Scroll compressors allow wide modula
112. the S4 probe alarm manag and alarm range parameter alarm manag S4 alarm MIN amp MAX temperature parameters LowSH low LowSH protection ALARM amp LowSH Depends on automatic Protection action Check the LowSH alarm threshold superheat activated ashing configuration already active and timeout parameters parameter LOP low evapo LOP protection ALARM amp LOP Depends on automatic Protection action Check the LOP alarm threshold and ration tempera activated ashing configuration already active timeout parameters ture parameter OP high OP protection ALARM amp MOP Depends on automatic Protection action Check the MOP alarm threshold and evaporation activated ashing configuration already active timeout parameters temperature parameter High Tcond high High Tcond pro ALARM amp MOP Depends on automatic Protection action Check the Hitcond alarm threshold conden tempe ection activated ashing configuration already active and timeout parameters rature parameter Low suction Threshold and ALARM flashing Depends on automatic o effect Check the threshold and timeout temperature timeout exceeded configuration parameters parameter EEPROM damaged EEPROM for red alarm ALARM flashing Depends on Replace dri Total shutdown Replace the driver Contact service operating and or LED configuration ver Contact unit parameters parameter service damaged 43 EVD evolution
113. 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 0300005EN rel 3 3 25 01 2013 CAREL 11 TECHNICAL SPECIFICATIONS Power supply Lmax 5 m e 24Vac 10 15 to be protected by external 2 A type T fuse e 24Vdc 10 15 to be protected by external 2 A type T fuse Use a dedicated class 2 transformer max 100 VA Power input 16 2 W with ALCO EX7 EX8 valves 9 2 W with all other valves 35 VA with EVBATO0400 35 VA with ALCO EX7 EX8 valves 20 VA without EVBAT00400 and with all other valves Emergency power supply 22 Vdc 5 If the optional EVBAT00200 300 module is installed Lmax 5 m nsulation between relay output and other outputs reinforced 6 mm in air 8 mm on surface 3750 V insulation otor connection 4 wire shielded cable i e CAREL code E2VCABS 00 or 4 wire shielded cable AWG 22 Lmax 10 m or 4 wire shielded cable 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 30m
114. the LowSH threshold is greater than the superheat value measured and that he corresponding protection is activated integration time gt 0 s If necessary decrease he value of the integration time The superheat temperature measured by the driver does not reach low values but there 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 integration time to 250 s and increase the deri vative time to 10 sec Many cabinets defrosting at the same time Stagger the start defrost times If this is not possible if the conditions in the previous two points are not present increase the superheat set point and the LowSH thresholds by at least 2 C on the cabinets 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 ba
115. the driver and update the driver and display firmware downloadable from http ksa carel com See the appendix Key P1 Shared pressure probe P2 Pressure probe 11 EVD evolution 0300005EN rel 3 3 25 01 2013 2 9 Connecting the USB RS485 converter Only on EVD evolution RS485 Modbus models can the configuration computer be connected using the USB RS485 converter and the serial port according to the following diagram CLOSE EVD evolution Analog Digital Input E et L 5 GND wx Fig 2 m Key Note the serial port can be used for configuration with the VPM program and for updating the driver firmware downloadable from http ksa carel com to save time up to 8 EVD evolution drivers can be connected to the computer updating the firmware at the same time each driver must have a different network address personal computer for configuration 2 USB RS485 converter 2 10 Upload Download and Reset parameters display Procedure 10 press the Help and Enter buttons together for 5 seconds 11 a multiple choice menu will be displayed use UP DOWN to select the required procedure 12 confirm by pressing ENTER 13 the display will prompt for confirmation press ENTER 14 at the end a message will be shown to notify the operation if the operation was successful e UPLOAD the display saves all the values of the parameters on the s
116. 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 valves from Parameter description Def Min Max UOM CONTROL LowSH protection threshold 5 40 72 set point K F superheat LowSH protection integration 15 0 800 S time ALARM CONFIGURATION Low superheat alarm timeout 300 J0 18000 s LowSH 0 alarm DISABLED Tab 7 b 33 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 ofthe action the lower the value the more intense the action The integration time is set automatically based on the type of main control SH Low_SH_TH ON Low_SH OFF ON A OFF Key SH Superheat A Alarm Low_SH_TH_ Low_SH protection threshold D Alarm timeout Low_SH Low_SH protection t Time B Automatic alarm reset LOP low evaporation pressure LOP Low Operating Pressure The LOP protection threshold is applied as a saturated evaporation temperature value so that it can be easily compared against the technical spec
117. tical behaviour or in complementary mode whereby if one valve opens the other closes by the same percentage To achieve such behaviour simply set the valve parameter Two EXV connected together and connect the valve motor power supply wires to the same connector In the example shown below for operation of valve B_2 with valve B_1 in complementary mode simply swap the connection of wires 1 and 3 2 CAREL valves connected in parallel 2 CAREL valves connected in com mode plementary mode CAREL E V CAREL E V VALVE A 1 VALVE B_1 n am 4 4 2 2 3 I 3 1 1 CAREL E V CAREL E V VALVE A 2 VALVE B_2 aE 4 4 2 2 131 LI TE LI 11 13 Ira Ser i i 1 3 2 4 1 3 2 4 Lats diet e i Fig 2 h 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 CAREL valve model E2V E3V E4V E5V E6V E7V Two EXVs JOK E3V45 E4V85 NO NO INO con OPD 35 bars MOPD 22 bars nected E3V55 E4V95 together OPD 26 bars MOPD 15 bars E3V65 OPD 20 bars Note MOPD Maximum Operating Pressure Differentia 2 6 Shared pressure probe Only 4 to 20 mA pressure probes not ratiometric can be shared The probe can be shared by a max
118. tion 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 controller running a special application to manage units with Digital scroll compressors Parameter Description Def CONFIGURATION Main control multiplexed cabinet cold room air conditioner chiller with Digital Scroll compressor Tab 5 h EVD evolution 0300005EN rel 3 3 25 01 2013 Key CP_ Compressor V__ Solenoid valve C__ Condenser T__ Temperature probe L Liquid receiver EV_ Electronic valve F__ Dewatering filter E Evaporator S Liquid gauge P__ Pressure probe For information on the wiring see paragraph 2 11 General connection diagram 5 5 BLDC Control with compressor A Important this type of control is incompatible with adaptive control and autotuning To be able to use this control function only available for CAREL valve drivers the driver must be connected to a CAREL pCO programmable controller running an application able to manage a
119. to 5 V 1 1 4 2 barg 2 0 4 9 3 barg 3 1 9 3 barg 4 0 17 3 barg 5 0 85 34 2 barg 6 0 34 5 barg 7 0 45 barg Electronic OUT 4 to 20 MA 8 0 5 7 barg 9 0 10 barg 18 2 bar 25 barg 30 barg 44 8 barg 4 remoto 0 5 7 barg 0 0 0 0 PYP 5 remoto 0 6 remoto 0 7 remoto 0 8 remoto 0 9 remoto 0 10 barg 18 2 barg 25 barg 30 barg 44 8 barg 20 segnale esterno 4 20 mA cannot be selected 21 1 to 12 8 barg 22 0 to 20 7 barg 23 1 86 to 43 0 barg Ratiometric 1 to 9 3 barg 146 Relay configuration Disabled 2 alarm relay opened in case of alarm 3 Solenoid valve relay open in standby 4 valve alarm relay opened in stand by and control alarms 5 Reversed alarm relay closed in case of alarm 6 Valve status relay open if valve closed Alarm relay 139 Probe S4 CAREL NTC 2 CAREL NTC HT high temperature 3 NTC built in SPKP TO CAREL NTC 20 147 DI2 configuration Disabled 2 valve regulation optimization after defrost 3 Battery alarm management 4 Valve forced open at 100 5 Regulation start stop 6 Regulation backup 7 Regulation security Disabilitato 137 Display main var 1 1 Valve opening 2 Valve position 3 Current cool capacity 4 Control set point 5 Superheat 6 Suction temperature 7 Evaporation temperature 8 Evaporation press
120. to the standard display The following table shows the variables used by the driver depending on the values of the Main control and Auxiliary control parameters These variables can be shown on the display by accessing display mode see paragraph 3 3 M w in control CAREL Variable displayed Superheat control Auxiliary control HiTcond HiTcond inverse Modulat thermostat Subco oling measure Transcritical CO Hot gas by pass temperature Hot gas by pass pressure EPR back pressure ACor chiller with Digital Scroll compr AC chiller with BLDC compres Superheat re gulation with 2 temperature probes I O expander for pCO Valve opening Valve position step Current unit cooling capacity Control setpoint Superheat Suction temperature Evaporation temperature Evaporation pressure Condensing temperature Condensing pressure Modulating thermostat temperature EPR pressure back pressure Hot gas bypass pressure Hot gas bypass temperature CO gas cooler outlet temperature CO gas cooler outlet pressure CO gas cooler pressure set point Condensation pressure for subcooling measure SBC Condensation Temperature bubble for subcooling measure SBC Liquid temperature for subcooling mea sure SBC Subcooling measurement S1 probe measurement S2 probe measureme
121. ty Electrical safety EN 60730 1 EN 61010 1 VDE 0631 1 Electromagnetic compatibility EN 61000 6 1 EN 61000 6 2 EN 61000 6 3 EN 61000 6 4 EN61000 3 2 EN55014 1 EN55014 2 EN61000 3 3 Tab 11 a EVD evolution 0300005EN rel 3 3 25 01 2013 48 CAREL 12 APPENDIX VPM VISUAL PARAMETER MANAGER 12 1 Installation a 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_CDzzip 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 5 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 oem E Don t ask for password in the fi 148 148 100 Accessible paran 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 Fig 12 c 5 select the model from the range and create a new project or choose an existing project select Device model by the user A new project c
122. ue exactly half way between the two limits indicated EVD evolution 0300005EN rel 3 3 25 01 2013 e 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 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 LOP ALARM Fig 7 b Key T_EVAP __ Evaporation temperature D Alarm timeout LOP_TH Low evaporation temperature ALARM Alarm protection threshold LOP LOP protection t Time B Automatic alarm reset MOP high evaporation pressure MOP Maximum Operating Pressure The MOP protection threshold is applied as a saturated evaporation temperature value so that it can be easily compared against the technical specifications supplied by the manufacturers of the compressors The protector is activated so as to prevent too high evaporation temperatures from causing an excessive workload for the compressor with consequent overheating of the motor and possible activation of the thermal protector The protector is very useful in self contained units if starting with a high refrigerant charge or when there are sudden variations in the load The protector is als
123. um EEV steps 480 O Min Max UOM oO 9999 9999 step step Tab 6 1 The formula used is Apertura Opening Min_step_EEV Max_step_EEV Min_step_EEV 100 25 t 0 25 Min_step_EEV steps Gita i i Lc Max_step_EEV Fig 6 b In this case the formula used is Apertura Opening P Max_step_EEV 100 P Posizione valvola in stand by Position valve in stand by AN 1 99 steps r 0 100 Min_step_EEV Max_step_EEV Fig 6 c Note if Valve open in standby 1 the positions of the valve when setting Valve position in standby 0 and 25 do not coincide Refer to the above formulae Pre positioning start control If during standby a control request is received before starting control the valve is moved to a precise initial position The pre position time is the time the valve is held in a steady position based on the parameter Valve opening at start up Parameter description Def Min Max UOM CONTROL Pre positioning time 6 0 18000 s Valve opening at start up evaporator valve 50 0 100 capacity ratio Tab 6 m The valve opening parameter should be set based on the ratio between the rated cooling capacity of the evaporator and the valve e g rated evaporator cooling capacity 3kW rated valve cooling capacity 10kW valve opening 3 10 33 If the capacity request is 100 Opening Valve opening at
124. unit with BLDC scroll compressor In addition the compressor must be controlled by the CAREL Power speed drive with inverter specially designed to manage the speed profile required by the compressor operating specifications Two probes are needed for superheat control PA TA plus two probes located downstream of the compressor PB TB for discharge superheat and discharge temperature TB control Parameter Description Def CONFIGURATION Main control multiplexed showcase cold du room AC chiller with BLDC compressor Tab 5 i z Sicani I DICO 899 shield Modbus RS485 Gas pCO PAN _ shield feel Fig 5 c Key CP Compressor V Solenoid valve C Condenser 5 Liquid gauge L Liquid receiver EV Electronic valve F Dewatering filter E Evaporator TA TB_ Temperature probes _ PA PB__ Pressure probes For information on the wiring see paragraph 2 11 General connection diagram To optimise performance of the refrigerant circuit compressor operation must always be inside a specific area called the envelope defined by the compressor manufacturer EVD evolution 0300005EN rel 3 3 25 01 2013 CAREL A Inviluppo Envelope Temperatura di condensazione C Condensing temperature C Temperatura di evaporazione C Evaporation temperature C Fig 5 d The pCO controller defines th
125. ure 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 S1 probe measurement 9 S2 probe measurement 20 S3 probe measurement 21 S4 probe measurement 22 4 20 mA input value 23 0 10 V input value Superheat 45 172 37 EVD evolution 0300005E 1 S 3 3 25 01 2013 CAREL Q e MEAE Parameter description Def Min Max UOM g a 3 Notes 9 P T 3 3 re C Display main var 2 See display main var 1 Valve opening _ 46 173 C S1 probe alarm manag Valve at fixed 24 151 1 No action position 2 Valve forced closed 3 Valve at fixed posit 4 Use backup probe S3 C S2 probe alarm manag Valve at fixed 25 152 1 No action position 2 Valve forced closed 3 Valve at fixed posit 4 Use backup probe S4 C S3 probe alarm manag No action 26 153 1 No action 2 Valve forced closed 3 Valve at fixed posit C S3 probe alarm manag No action 27 154 1 No action 2 Valve forced closed 3 Valve at fixed posit C_ Unit of measure C K barg F psig C K barg 21 48
126. used either installed on the driver or connected via tLAN or pLAN to a controller 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 integration time which determines the intensity if set to 0 the protector is disabled set automatically based on the type of main control e alarm with activation threshold the same as the protector and timeout 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 High Tcond Moderate closing Controlled Reverse HiTcond Moderate opening Controlled Tab 7 a Reaction summary description of the type of action in controlling the valve Reset summary description of the type of reset following the activation of the protector Reset is controlled to avoid swings around the activation
127. ve Ifthe superheat remains high check the electrical connections and or replace the valve The cabinet does not reach the set temperature despite the value being opened to the maximum for multiple xed cabinets 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 ofthe 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 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 cabinet does not reach the set temperature and the position of the valve is always 0 for multiplexed cabinets only The driver in pLAN or tLAN configura tion does not start control and the valve remains closed Check the pLAN tLAN connections Check that the pCO application connected to
128. vents for starting control of the refrigeration unit Control delay after defrost Some types of refrigerating cabinets have problems controlling the electronic valve in the operating phase after defrost In this period 10 to 20 min after defrosting the superheat measurement may be altered by the high temperature of the copper pipes and the air causing excessive opening of the electronic valve for extended periods in which there is return of liquid to the compressors that is not detected by the probes connected to the driver In addition the accumulation of refrigerant in the evaporator in this phase is difficult to dissipate in a short time even after the probes have started to correctly measure the presence of liquid superheat value low or null The driver can receive information on the defrost phase in progress via digital input 2 The Start up delay after defrost parameter is used to set a delay when control resumes so as to overcome this problem During this delay the valve will remain in the pre positioning point while all the normal probe alarms procedures etc Managed If there is a change in unit cooling capacity of at least 10 sent from the pCO via the pLAN the valve is positioned proportionally In practice this involves repositioning starting from the current position in proportion to how much the cooling capacity of the unit has increased or decreased in percentage terms When the calculated positi
129. wn Check the Power supply mode para supply mode supply with Po POWER configuration Power meter and power supply wer supply mode LED parameter supply mode parameter setto flashin parameter AC power supply gRed setting alarm LED Tab 9 d In the event of AC power supply with the Power supply mode parameter set to DC no alarm is displayed Alarm only visible if driver connected to EVDBAT00400 battery module and digital input configured accordingly 9 2 Alarm relay configuration O x ote The relay contact is open when the driver is not powered During normal operation it can be disabled and thus will be always open or configured as the alarm limits can also be set outside of the range of measurement to avoid unwanted probe alarms In this case the correct operation of the unit or the correct signalling of alarms will not be guaranteed e alarm relay during normal operation the relay contact is closed and by default after having selected the type of probe used the alarm openswnen any alarni is activata tcan De used to Switch OFF the limits will be automatically set to the limits corresponding to the range compressor and the system in the event of alarms f tofth b e solenoid valve relay during normal operation th
130. work addresses or the malfunction of the pCO controller a LAN error alarm will be signalled The LAN error affects the control of the driver as follows e case 1 unit in standby digital input DI1 DI2 disconnected the driver will remain permanently in standby and control will not be able to start case 2 unit in control digital input DI1 DI2 disconnected the driver will stop control and will go permanently into standby case 3 unit in standby digital input DI1 DI2 connected the driver will remain in standby however control will be able to start if the digital input is closed In this case it will start with current cooling capacity 100 case 4 unit in control digital input DI1 DI2 connected the driver will remain in control status maintaining the value of the current cooling capacity If the digital input opens the driver will go to standby and control will be able to start again when the input closes In this case it will start with current cooling capacity 100 EVD evolution 0300005EN rel 3 3 25 01 2013 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 The
131. work powered by different transformers with just one earth point Typical application for a series of drivers in different electrical panels 230Vac 230 Vac Fig 2 f EVD evolution 0300005EN rel 3 3 25 01 2013 10 CAREL A Important earthing GO and G on a driver connected to a serial network will cause permanent damage to the driver Fig 2 9 Installation environment A Important avoid installing the driver in environments with the following characteristics e 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 driver to direct sunlight and to the elements in general A Important When connecting the driver the following warnings must be observed if the driver is used in a way not specified in this manual the level of protection is not guaranteed incorrect connection to the power supply may seriously damage the driver e use cable ends suitable for the corresponding terminals Loosen each screw and insert the cable ends then tighten the screws and lightly ug the cables to check correct tightness separate as much as possible at least
132. y the aster controller e g pCO once the parameter has been set to 1 he driver returns it to 0 zero only if forced emergency closing is completed successfully Standby Standby corresponds to a situation of rest in which no signals are received to control the electronic valve This normally occurs e 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 the electronic valve driver is in standby when the compressor stops or the solenoid valve closes LThe valve is closed or open according to the setting of Valve open in standby The percentage of opening is set using Valve position in standby In this phase manual positioning can be activated Parameter description Def CONTROL Valve open in standby 0 0 1 0 disabled valve closed 1 enabled valve open according to parameter Valve position in standby Valve position in standby 0 0 0 25 1 100 opening Min Max UOM 100 Tab 6 k EVD evolution 0300005EN rel 3 3 25 01 2013 30 CAREL These two parameters determine the position of the valve in standby based on the minimum and maximum number of valve steps Parameter description Def VALVE Minimum EEV steps 50 Maxim

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