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1. Parameter description Def Min Max UOM PROBESs S1 alarm pressure S1_ 1 20 290 S1_AL_MAX barg AL_MIN psig S1 alarm MAX pressure S1_ 93 S1_AL_ 200 2900 barg AL_MAX psig S2 alarm temp S2_AL_ 50 60 S2_AL_MAX C F IN S2 alarm MAX temp S2_AL_ 105 S2_AL_ 200 392 C F AX S3 alarm pressure S3_ 1 20 S3_AL_MAX barg AL_MIN psig S3 alarm MAX pressure S3_ 93 S3_AL_ 200 2900 barg AL_MAX psig S4 alarm temp S4_AL_ 50 60 S4_AL_MAX C F IN S4 alarm MAX temp S4_AL_ 105 S4_AL_M 200 392 C F AX Tab 9 c The behaviour of the driver in response to probe alarms can be configured using the manufacturer parameters The options are no action regulation continues but the correct measurement of the variables is not guaranteed e forced closing of the valve regulation stopped e valve forced to the initial position regulation stopped use the backup probe valid only for probe S1 and S2 alarms regulation continues Parameter description Def CONFIGURATION S1 probe alarm manag o action ve forced closed ve at fixed position Use backup probe 3 2 probe alarm manag o action Valve forced closed Valve at fixed position Use backup probe S4 S3 probe alarm manag o action Valve forced closed Valve at fixed position S4 probe alarm manag o action Valve forced closed Valve at fixed position REGULATION
2. Tab 4 e The superheat set point and all the parameters corresponding to PID regulation 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 the superheat regulation mode can be set which differs based on the application chiller refrigerated cabinet etc In the event of errors in the initial configuration these parameters can later be accessed and modified inside the service or manufacturer menu If the driver default parameters are restored RESET procedure see the chapter on Installation when next started the display will again show the guided commissioning procedure CAREL 4 3 Checks after commissioning After commissioning e check that the valve completes a full closing cycle to perform alignment e set if necessary in Service or Manufacturer programming mode the superheat set point otherwise keep the value recommended by CAREL based on the application and the protection thresholds LOP MOP etc See the chapter on Protectors 4 4 Other functions By entering Service programming mode other types of main regulation can be selected transcritical CO hot gas by pass etc as well as so called advanced regulation functions which do not involve the superheat activating auxiliary controls that use
3. EN55014 2 EN61000 3 3 Tab 11 a 43 EVD evolution 0300005EN rel 1 0 16 06 2009 12 1 Installation On the http ksa carel com website under the Parametric Controller Software section select Visual Parameter Manager A window opens allowing 3 files to be downloaded 1 VPM_CDzip for burning to a CD 2 Upgrade setup 3 Full setup the complete program For first installations select Full setup for upgrades select Upgrade setup The program is installed automatically by running setup exe Note if deciding to perform the complete installation Full setup first uninstall any previous versions of VPM 12 2 Programming VPM When opening the program the user needs to choose the device being configured EVD evolution The Home page then opens with the choice to create a new project or open an existing project Choose new project and enter the password which when accessed the first time can be set by the user Fig 12 a Then the user can choose to directly access to the list of parameters for the EVD evolution saved to EEPROM select tLAN This is done in real time ONLINE mode at the top right set the network address 198 and choose the guided recognition procedure for the USB communication port Enter at the Service or Manufacturer level Fig 12 b EVD evolution 0300005EN rel 1 0 16 06 2009 44 CAREL 12 APPENDIX VPM VISUAL
4. the power required to close the valve The display shows both types of alarms in two different modes system alarm on the main page the ALARM message is displayed flashing Pressing the Help button displays the description of the alarm and at the top right the total number of active alarms Surriscaldam 4 9 E Apertura valvola rr OFF J ALARM Rele Eeprom danneggiata Fig 9 b regulation alarm next to the flashing ALARM message the main page shows the type of protector activated Surriscaldam 4 9 E Apertura valvola 44 x OH iF ALARM Rele 2D Prg Esc fh Fig 9 c Note to display the alarm queue press the Help button and scroll using the UP DOWN buttons the regulation alarms can be disabled by setting the corresponding timeout to zero Type of alarm Cause of alarm LED Display Relay Reset Effect on regu Checks solutions lation Probe S1 Probe S1 faulty red alarm ALARM flashing Depends on automatic Depends on pa Check the probe connections or exceeded se LED configuration rameter 51 probe Check the S1 probe alarm manag alarm range parameter alarm manag and S1 alarm MIN amp MAX pressure parameters Probe S2 Probe S2 faulty red alarm ALARM flashing Depends on automatic Depends
5. 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 the possibility to enable or disable the synchronisation procedure depends on the mechanics of the valve When the setting the valve parameter the two synchronisation parameters are automatically defined The default values should not be changed Unblock valve This procedure is only valid when the driver is performing superheat regulation Unblock valve is an automatic safety procedure that attempts to unblock a valve that is supposedly blocked based on the regulation variables superheat valve position The unblock procedure may or may not succeed depending on the extent of the mechanical problem with the valve If for 10 minutes the conditions are such as to assume the valve is blocked the procedure is run a maximum of 5 times The symptoms of a blocked valve do not necessarily mean a mechanical blockage They may also represent other situations mechanical blockage of the solenoid valve upstream of the electronic valve if installed e electrical damage to the solenoid valve upstream of the electronic valve blockage of the filter upstream of the electronic valve if installed e electrical problems with the electronic valve motor e electrical problems in the driver valve connection cables incorrect driver valve electrical connection e electronic p
6. fit the display board as shown the display will come on and if the driver is being commissioned the guided configuration procedure will start 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 13 3 2 Display and keypad The graphic display shows 2 system variables the regulation status of the driver the activation of the protectors any alarms and the status of the relay output O Surriscaldam L 4 9 K Q Alper tura Fraser valvola i ib 44 rs L in Prg Esc 4 t 3 Fig 3 c Key 1__ 1st variable displayed 2__ 2nd variable displayed 3 relay status 4 alarm press HELP 5 _ protector activated 6__ regulation status Display writings Regulation status Protection active ON Operation LowSH Low superheat OFF Standby LOP Low evaporation tempe rature POS Positioning MOP High evaporation tempe rature WAIT Wait High High condensing tempe Tcond rature CLOSE Closing Tab 3 b Keypad Button Function Prg opens the screen for entering the password to access program ming mode a ifin alarm status displays the alarm qu
7. 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 7 General connection diagram 23 EVD evolution 0300005EN rel 1 0 16 06 2009 6 1 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 HT 50KO at 25 C NTCO HTOO 0T120 C 150 C per 3000 h NTC built in SPKP TO 40T120 C A Attention in case of NTC bui
8. 0 to 10 V input for analogue valve positioning read by input S1 There is no PID regulation nor any protection LowSH LOP MOP High Tcond no valve unblock procedure and no auxiliary regulation with corresponding forced closing of the valve and changeover to standby status aa EVD evolution gt 100 0 Parameter description Def Min Max UOM Fig 5 g ADVANCED CO regul A coefficient 33 100 800 Key CO2 regul B coefficient 22 7 100 800 Ev_ Electronic valve A__ Valve opening REGULATION w PID proport gain 15 0 800 For the wiring see paragraph 2 7 General connection diagram PID integral time 150 0 1000 s A a ore PID derivative time 5 0 800 Is Important the pre positioning and repositioning procedures are not performed Manual positioning can be enabled when regulation is active or in standby EVD evolution 0300005EN rel 1 0 16 06 2009 5 4 Auxiliary regulation Auxiliary regulation can be activated at the same time as main regulation and uses the probes connected to inputs S3 and or S4 Parameter description Def CONFIGURATION Auxiliary regulation Disabled Disabled High condensing temperature protection on S3 probe Modulating thermostat on S4 probe Backup probes on 53 amp S4 Tab 5 h For the high condensing temperature protection only available with superheat regulation an addi
9. i Parameter description Def Min Max UOM 3 n 3 Notes 3 od CONFIGURATION A_ Network address 198 1 207 x 11 138 A Refrigerant R404A 13 140 R22 R134a R404A R407C R410A R507A R290 R600 R600a R717 R744 R728 R1270 R417A R422D A Valve CAREL EV z 14 141 CAREL E V Alco EX4 Alco EX5 Alco EX6 Alco EX7 Alco EX8 330Hz Carel recommended Alco EX8 500Hz Alco specification Sporlan SEI 0 5 11 Sporlan SER 1 5 20 Sporlan SEI 30 Sporlan SEI 50 Sporlan SEH 100 Sporlan SEH 175 Danfoss ETS 25B Danfoss ETS 50B Danfoss ETS 100B Danfoss ETS 250 Danfoss ETS 400 A Probe S1 Ratiometric 7 16 143 Ratiometric OUT 0 to 5 V Electronic OUT 4 to 20 mA 1 to 9 3 barg 1 to 4 2 barg 0 5 to 7 barg 0 4 to 9 2 barg 0 to 10 barg 1 to 9 3 barg 0 to 18 2 bar 0 to 17 3 barg 0 to 25 barg 0 4 to 34 2 barg 0 to 30 barg 0 to 34 5 barg 0 to 44 8 barg 0 to 45 barg remote 0 5 to 7 barg remote 0 to 10 barg remote 0 to 18 2 barg remote 0 to 25 barg remote 0 to 30 barg remote 0 to 44 8 barg 4 to 20 mA external signal A Main regulation Centralized 15 142 centralized cabinet cold room cabinet cold self contained cabinet cold room room perturbated cabinet cold room subcritical CO2 cabinet cold room R404A condenser for subcritical CO2 AC or chiller with plate evaporator AC or chiller with shell tube evaporator AC or chiller with battery coil evaporator AC or chiller with variable cooling capacity AC
10. 0 8000 s LowSH 0 alarm DISABLED Low evaporation temperature alarm 300 O 8000 S imeout LOP 0 alarm DISABLED High evaporation temperature alarm 600 0 8000 s imeout MOP 0 alarm DISABLED High condensing temperature alarm 600 0 8000 s imeout High Tcond 0 alarm DISABLED Low suction temperature alarm 50 60 76 200 392 C F hreshold Low suction temperature alarm 300 0 18000 S imeout Tab 9 e 9 5 EEV motor alarm n the event of incorrect connection or damage to the valve motor an alarm will be signalled see the table of alarms and the driver will go into wait status as it can longer control the valve The alarm is indicated by he NET LED and is reset automatically after which regulation will resume 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 EVD evolution 0300005EN rel 1 0 16 06 2009 CAREL 9 6 LANerroralarm If the connection to the pLAN network is offline for more than 6s due to an electrical problem the incorrect configuration of the network addresses or the malfunction of the pCO controller a LAN error alarm will be signalled The LAN error affects the
11. DI2 configuration Disabled valve regulation optimization after defrost Disabled 37 Display main var 1 Valve opening Valve position Actual cool Capacity Regulation set point Superheat Suction temperature Evaporation temperature Evaporation pressure Condensing temperature Condensing pressure Modulating thermostat temperature EPR pressure Hot gas by pass pressure Hot gas by pass temperature CO gas cooler outlet temperature CO gas cooler outlet pressure CO gas cooler pressure set point S1 probe measurement S2 probe measurement S3 probe measurement S4 probe measurement 4 20MA input value 0 10V input value Superheat 45 72 Display main var 2 See display main var 1 Valve ope ning 46 173 S1 probe alarm manag o action alve forced closed alve at fixed posit se backup probe 3 Valve at fixed position 24 151 VICZKZ 2 probe alarm manag o action alve forced closed alve at fixed posit se backup probe S4 lt lt Valve at fixed position 25 152 NIC 3 probe alarm manag o action alve forced closed No action 26 153 V Valve at fixed posit S3 probe alarm manag o action Valve forced closed Valve at fixed posit No action 27 154 Language Italian English Italian Unity measure C K barg F psig C K barg 21 148 EV
12. to modulate the opening of the electronic valve so as to limit the lowering of the temperature read and consequently reach the regulation set point This is useful in applications such as the centralized cabinets to avoid the typical swings in air temperature due to the ON OFF regulation thermostatic of the solenoid valve A temperature probe must be connected to input S4 located in a similar position to the one used for the traditional temperature control of the cabinet In practice the close EVD evolution 0300005EN rel 1 0 16 06 2009 22 CAREL the controlled temperature gets to the set point the more the regulation function decreases the cooling capacity of the evaporator by closing the expansion valve By correctly setting the related parameters see below a very stable cabinet temperature can be achieved around the set point without ever closing the solenoid valve The function is defined by three parameters set point differential and offset Parameter description Def Min Max UOM ADVANCED odul thermost setpoint 0 60 200 C OF 76 392 odul thermost differential 0 1 0 1 100 C F 0 2 180 odul thermost SHset offset 0 fun 0 0 0 100 K R ction disabled 180 Tab 5 i 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 defin
13. 0 60 76 200 392 A 6 5 R Valve opening 0 0 00 A 7 6 R CO2 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 0 A 20 9 R Regulation set point 0 60 76 200 392 A 21 20 R Driver firmware version 0 0 0 A 25 24 R Valve position 0 0 9999 4 31 R Actual cooling capacity 0 0 00 7 34 R W Low suction temperature 0 0 D 0 R LAN error 0 0 D 2 R uw EEPROM damaged 0 0 D 3 2 R lt Probe SI 0 0 D 4 3 R S Probe 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 vu LOP low evaporation temperature 0 0 D 10 9 R Zz MOP high evaporation temperature 0 0 D 11 10 R S LowSH low superheat 0 0 D 12 11 R z High Tcond high condensing temperature 0 0 D 13 12 R DI1 digital input status 0 0 D 14 13 R DI2 digital input status 0 0 D 15 14 R Enable EVD regulation 0 0 D 22 21 R W Tab 8 b Type of variable A analogue D digital l integer SVP variable address with CAREL protocol on 485 serial card Modbus variable address with Modbus protocol on 485 serial card 8 3 Variables used based on the type of control 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 Display mode and via a serial connection with VPM PlantVisorPRO Proceed
14. 0 60 min Tab 6 j A Important if the superheat temperature should fall below the set point regulation resumes even if the delay has not yet elapsed EVD evolution 0300005EN rel 1 0 16 06 2009 Key A _ Regulation request W_ Wait S___ Standby T1_ Pre positioning time P__ Pre positioning T2 Start up delay after defrost R__ Regulation Time Positioning change cooling capacity This regulation status is only valid for the pLAN driver If there is a change in unit cooling capacity of at least 10 sent from the pCO via the pLAN the valve is positioned proportionally In practice this involves repositioning starting from the current position in proportion to how much the cooling capacity of the unit has increased or decreased in percentage terms When the calculated position has been reached regardless of the time taken this varies according to the type of valve and the position there is a constant 5 second delay before the actual regulation phase starts O 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 regulation must be more reactive see the chapter on Regulation so as to react promptly to variations in load that are not communicated to the driver Key A__ Regulation request T3 _
15. 10 Fig 6 a Key A offset B gain Parameter description Def Min Max UOM PROBES S1 calibration offset 0 60 870 60 870 barg psig 60 60 mA S1 calibration gain on 4 20mA_ 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 d Digital inputs Digital input DI1 is used to activate the controller e digital input 1 closed regulation activated e digital input 1 open driver in standby see paragraph Regulation status As regards digital input 2 if configured this is used to tell the driver the active defrost status Defrost active contact DI2 closed When entering Manufacturer programming mode the start up delay after defrost can be set see the following paragraphs Parameter description Def Min Max UOM CONFIGURATION DI2 configuration Disabled Disabled Valve regulation optimization after defrost REGULATION Start up delay after defrost 10 0 60 min Tab 6 e CAREL Output The relay output can be configured to control the solenoid valve or as an alarm relay output See the chapter on Alarms Parameter description Def CONFIGURATION Relay configuration Alarm Disabled alarm relay opened in case of alarm Solenoid valve re
16. 24 Stepper motor power supply S2 which will be fitted after the evaporator and digital input 1 to COM1 NO1 Alarm relay o E GND Earth for the signals enable regulation As an alternative to digital input 1 regulation can VREF Power to active probes be enabled via remote signal tLAN pLAN RS485 For the positioning S Probe 1 pressure or 4 to 20 mA external signal of the probes relating to other applications see the chapter on 52 Probe 2 temperature or 0 to 10 V external signal Regulation S3 Probe 3 pressure e inputs S1 S2 are programmable and the connection to the terminals S4 Probe 4 temperature depends on the setting of the parameters See the chapters on DII Digital input 1 Commissioning and Functions DI Digital input 2 pressure probe S1 in the diagram is ratiometric See the general amp Terminal for tLAN pLAN RS485 Modbus connection connection diagram for the other electronic probes 4 to 20 MA or Terminal for tLAN pLAN RS485 Modbus connection combined Terminal for pLAN RS485 Modbus connection aa service serial port remove the cover to access it Tab 2 a EVD evolution 0300005EN rel 1 0 16 06 2009 CAREL 2 4 Installation 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 e exposure of the driver to direct sunlight and
17. 30 barg 0 to 34 5 barg 0 to 45 barg 0 to 44 8 barg remote 0 5 to 7 barg remote 0 to 10 barg remote 0 to 18 2 barg remote 0 to 25 barg remote 0 to 30 barg remote 0 to 44 8 barg EVD evolution 0300005EN rel 1 0 16 06 2009 24 CAREL 6 FUNCTIONS Tab 6 c Calibrating pressure probes S1 S3 and temperature probes S2 and S4 offset and gain parameters In case it is necessary to make a calibration e 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 modifies the gradient of the line in the field from 4 to 20 mA of the temperature probe S2 and or S4 it is possible to use the offset parameter which represents a constant that is added to the signal across the entire range of measurement and can be expressed in C F If the 0 to 10 Vdc signal coming from an external controller on input S2 needs to be calibrated both the offset and the gain parameters can be used the latter which modifies the gradient of the line in the field from 0 to 10 Vdc A A ax r x oa j B PE K ox fee f 4 A A E Vdc 0
18. As regards network connectivity the driver can be connected to either of the following a pCO programmable controller to manage the driver via pLAN a pCO programmable controller or PlantVisorPRO supervisor for supervision only via tLAN or RS485 Modbus respectively In this case ON OFF regulation is performed via digital input 1 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 regulation 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 regulation 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 1 1 Models Code Descri
19. application Protector regulation 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 regulation values suggested by CAREL for each application Parameter description Def Min Max UOM REGULATIO LowSH protection threshold 5 40 72 superh K F set point LowSH protection integral time 15 0 800 S LOP protection threshold 50 60 76 MOP th C F reshold LOP protection integral time 0 0 800 s 19 5 3 Advanced regulation EPR back pressure This type of regulation 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 Evaporator Pressure Regulator is used to set a pressure set point and the PID regulation parameters required to achieve this J L pT EVD evolution a a EVD evolution a Key V1_ Solenoid valve E V2__ Thermostatic expasnion valve EV Evaporator Electronic valve For the wiring see paragraph 2 7 General connection diagram This involves PID regulation wi
20. as follows to display the variables e press UP DOWN press the DOWN button to move to the next variable screen e press Esc to return to the standard display Main regulation Variable displayed Superheat regulation Transcritical Hot gas by Hot gas EPR back Analogue Auxiliary regulation CO pass by pass pressure positioning High Tcond Modulating temperature pressure thermostat Valve opening Valve position step Actual unit cool capacity Regulation setpoint Superheat Suction temperature Evaporation temperature 35 EVD evolution 4 O300005EN rel 1 0 16 06 2009 CAREL Main regulation Variable displayed Superheat regulation Transcritical Hot gas by Hot gas EPR back Analogue Auxiliary regulation CO2 pass by pass pressure positioning High Tcond Modulating temperature pressure thermostat Evaporation pressure Condensing temperature Condensing pressure Modulating thermostat temperature EPR pressure back pressure Hot gas by pass pressure Hot gas by pass temperature CO gas cooler outlet temperature CO gas cooler outlet pressure CO gas cooler pressure set point S1 probe measurement S2 probe measurement S3 probe measurement S4 probe measurement 4 20 mA input value 0 10 Vdc input value DI1 digital input status DI2 digital input stat
21. is performed and then the standby phase starts Parametro description Def Min Max UOM VALVE EEV closing steps 500 0 9999 step Tab 6 9 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 regulation set point during defrosts except for those performed by reversing of the cycle or hot gas by pass In general it can be said that the electronic valve driver is in standby when the compressor stops or the solenoid valve closes The valve is closed or open delivering around 25 of the flow rate of refrigerant based on the setting of the valve open in standby parameter In this phase manual positioning can be activated Parameter description Def Min Max UOM REGULATION Valve open in standby 0 0 0 disabled valve closed 1 enabled valve open 25 Tab 6 h Pre positioning start regulation If during standby a regulation request is received before starting regulation the valve is Moved to a precise initial position Parameter description Def Min Max UOM REGULATION Valve opening at start up evaporator valve 50 0 100 capacity ratio Tab 6 i 25 This parameter should be set based on the ratio between
22. on pa Check the probe connections Check or exceeded se LED configuration rameter S2 probe the 52 probe alarm manag and alarm range parameter alarm manag S2 alarm MIN amp MAX temperature parameters Probe 53 Probe S3 faulty red alarm ALARM flashing Depends on automatic Depends on pa Check the probe connections or exceeded se LE configuration rameter S3 probe Check the S3 probe alarm manag alarm range parameter alarm manag and S3 alarm MIN amp MAX pressure parameters 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 4 probe the 54 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 flashing 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 flashing configuration already active timeout parameters ture parameter MOP high MOP protection ALARM amp MOP Depends on automatic Protection action Checkthe MOP alarm threshold and evaporation activated ashing configuration already active timeout parameters t
23. probe S3 to those normally 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 integral time which determines the intensity if set to 0 the protector is disabled set automatically based on the type of main regulation alarm with activation threshold the same as the protector and timeout if set to 0 disables the alarm signal Note The alarm signal is independent from the effectiveness of the protector and only signals that the corresponding threshold has been exceeded If a protector is disabled null integral time the relative alarm signal is also disabled Each protector is affected by the proportional gain parameter K for the PID superheat regulation 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 Tab 7 a Reaction summary description of the type of action in controlling the valve Reset summary description of the type of reset following the activation of the protector Reset is controlled to avoid swings around the activation threshold or immed
24. regulation of the driver as follows e case 1 unit in standby digital input DI1 disconnected the driver wil remain permanently in standby and regulation will not be able to start case 2 unit in regulation digital input DI1 disconnected the driver wil stop regulation and will go permanently into standby e case 3 unit in standby digital input DI1 connected the driver wil remain in standby however regulation will be able to start if the digita input is closed In this case it will start with actual cooling capacity 100 e case 4 unit in regulation digital input DI1 connected the driver wil remain in regulation status maintaining the value of the actual cooling capacity If the digital input opens the driver will go to standby and regulation will be able to start again when the input closes In this case it will start with actual cooling capacity 100 9 7 LAN error alarm for tLAN and RS485 Modbus driver If the driver used is fitted for tLAN or RS485 Modbus connection to a supervisor or other type of controller no LAN error will be signalled and the situation will have no affect on regulation The green NET LED will however indicate any problems in the line The NET LED flashing or off indicates the problem has lasted more than 150 s EVD evolution 0300005EN rel 1 0 16 06 2009 40 CAREL 10 TROUBLESHOOTING The following table lists a series of possible malfunctio
25. the rated cooling capacity of the evaporator and the valve e g rated evaporator cooling capacity 3kW rated valve cooling capacity 10kW valve opening 3 10 33 If the capacity request is 100 Opening Valve opening at start up If the capacity request is less than 100 capacity control Opening Valve opening at start up Current unit cooling capacity where the current unit cooling capacity is sent to the driver via pLAN by the pCO controller If the driver is stand alone this is always equal to 100 Note e this procedure is used to anticipate the movement and bring the valve significantly closer to the operating position in the phases immediately after the unit starts if there are problems with liquid return after the refrigeration unit starts or in units that frequently switch on off the valve opening at start up must be decreased If there are problems with low pressure after the refrigeration unit starts the valve opening must be increased Wait When the calculated position has been reached regardless of the time taken this varies according to the type of valve and the objective position there is a constant 5 second delay before the actual regulation 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 regulation phase Regulation The regulation request can be received by t
26. the user level Service Installer and manufacturer Modifying the Service parameters IThe 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 regulation 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 ZBOLNDOAU Fig 3 e Note if no button is pressed after 5 min the display automatically returns to the standard mode 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 valv
27. to the elements in general For installation proceed as follows with reference to the wiring diagrams 1 connect the probes and power supply the probes can be installed a maximum distance of 10 metres away from the controller as long as shielded cables are used with minimum cross section of 1 mm connect only one end of the shield to the earth in the electrical panel 2 connect any digital inputs maximum length 30 m 3 connect the power cable to the valve motor recommended 4 wire shielded cable AWG 18 22 Lmax 10 m 4 carefully evaluate the maximum capacity of the relay output specified in the chapter Technical specifications 5 program the driver if necessary see the chapter User interface 6 connect the serial network if featured follow to the diagrams below for the earth connection A Important When connecting the driver the following warnings must be observed 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 tug the cables to check correct tightness separate as much as possible at least 3 cm the probe and digital input cables from the power cables to the loads so as to avoid possible electromagnetic disturbance Never lay power cables and probe cables in the same conduits including those in the electrical panels e avoid i
28. 0 0 9999 step 36 163 C_ EEV nominal step rate 50 1 2000 step s 32 159 C_ EEV nominal current 450 0 800 mA I 33 160 C_ EEV holding current 100 0 800 mA 35 162 C_ EEV duty cycle 30 1 100 34 161 C_ EEV opening synchroniz 1 0 1 D 20 19 C_ EEV closing synchroniz 1 0 1 D 21 20 Tab 8 a 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 60 870 200 392 A 2 1 R Probe 3 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 by pass 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 odulating thermostat temperature 0 60 76 200 392 A 3 2 R Hot gas by pass 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
29. 0 to 30barg 0 to 34 5 barg 0 to 44 8barg 0 to 45 barg remote 0 5 to 7 barg remote 0 to 10 barg remote 0 to 18 2 barg remote 0 to 25 barg remote 0 to 30 barg remote 0 to 44 8 barg External signal 4 to 20mA Tab 4 d A Attention 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 O Note in the case of centralized 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 EVD evolution 0300005EN rel 1 0 16 06 2009 CAREL For the second and third driver select remote 0 5 to 7 barg Note e the range of measurement by default is always in bar gauge barg In the manufacturer menu the parameters corresponding to the range of measurement and the alarms can be customised if the probe used is not in the standard list If modifying the range of measurement the 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 u
30. 16600 e mail carel carel com www carel com Agenzia Agency 0300005EN rel 1 0 16 06 2009
31. 4 K Set point values outside of this range are quite infrequent and relate to special applications CAREL Key Parameter description Def Min Max UOM CP_ compressor EEV electronic expansion valve MOP protection threshold 50 LOP thre 200 392 C F C__ condenser V__ solenoid valve shold L liquid receiver E evaporator MOP protection integral time 20 0 800 s F__ dewatering filter P__ pressure probe transducer ADVANCED S liquid indicator T_ _ temperature probe High Tcond threshold 80 60 76 200 392 C F High Tcond integral time 20 0 800 S Tab 5 d For the wiring see paragraph 2 7 General connection diagram PID parameters Superheat regulation as for any other mode that can be selected with the main regulation parameter is performed using PID regulation which in its simplest form is defined by the law de t u t K e t 7 Je t dt T dt Key u t Valve position Ti__ Integral 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 he 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
32. CAL SPECIFICATIONS 43 12 APPENDIX VPM VISUAL PARAMETER MANAGER _ 44 12 1 Installation 44 122 Programming VPM iena iii 44 12 3 Copying the setup 12 4 Setting the default parameters E 12 5 Updating the driver and display firmwWare ssscssessssssesessesessesesete 45 EVD evolution 0300005EN rel 1 0 16 06 2009 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 high evaporation pressure MOP low evaporation pressure LOP and high condensing temperature protection and can manage as an alternative to superheat regulation special functions such as the hot gas by pass the evaporator pressure regulation EPR and control of the valve downstream of the gas cooler in transcritical CO circuits Together with superheat regulation it can manage an auxiliary regulation function selected between condensing temperature protection and modulating thermostat
33. D evolution 0300005EN rel 1 0 16 06 2009 32 CAREL o G 3 i Parameter description Def Min Max UOM 2 m 3 Notes io PROBES C S1 calibration offset 0 60 870 60 60 870 60 barg psig A 34 33 mA C_ S1 calibrat gain on 4 20mA 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 200 2900 barg psig A 30 29 MINIMUM 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 20 290 20 20 290 20 C F volt A 41 40 C S2 calibrat gain on 0 10V 1 20 20 A 43 42 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 pressure MINIMUM value 20 290 S3 pressure barg psig A 33 32 MAXIMUM value C S3 pressure MAXIMUM value 93 S3 pressure 200 2900 barg psig A 31 30 MINIMUM value C S3 alarm MIN pressure 1 20 290 S3 alarm MAX barg psig A 40 39 pressure C S3 pr
34. EVD evolution CAR E L electronic expansion valve driver lt a ai i dd Va IP x di Mg ma i E P A Pez p Br amp fee VG ed Mel si 7 hry gt lig Enc User manual LEGGI E CONSERVA gt QUESTE ISTRUZIONI lt READ AND SAVE THESE INSTRUCTIONS om 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 o
35. PARAMETER MANAGER Fig 12 c 2 select the model from the range and create a new project or choose an existing project select Device model Anew project can be created making the changes and then connecting later on to transfer the configuration OFFLINE mode Enter at the Service or Manufacturer level e select Device model and enter the corresponding code EETA Maria mma pen di cen ci im p E _ ares oa Dh aed a hal rif ci f ii i rien ma ia Femi m Lhe raiki Laka Fig 12 d goto Configure device the list of parameters will be displayed allowing the changes relating to the application to be made s sci E n ra Ai TOO II a 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 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 CAREL j 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 e read the list of parameters from the source driver with the Read command remove the connector from the service serial port connect the connect
36. Repositioning time C__ Change capacity W Wait NP_ Repositioning t Time R__ Regulation EVD evolution 0300005EN rel 1 0 16 06 2009 26 CAREL Stop end regulation The stop procedure involves closing the valve from the current position until reaching 0 steps plus a further number of steps so as to guarantee complete closing Following the stop phase the valve returns to standby ol ST OFF on Li i t OFF gt I T4 1 t e Fig 6 d Key A Regulation request R__ Regulation S Standby T4 Stop position time ST Stop t Time 6 3 Advanced regulation status As well as normal regulation status the driver can have 3 special types of status related to specific functions manual positioning this is used to interrupt regulation so as to move the valve setting the desired position e recover physical valve position recover physical valve steps when fully opened or closed unblock valve forced valve movement if the driver considers it to be blocked Manual positioning Manual positioning can be activated at any time during the standby or regulation phase Manual positioning once enabled is used to freely set the position of the valve using the corresponding parameter Parameter description Def Min _ Max UOM REGULATION Enable manual valve position 0 0 1 Manual valve position 0 0 9999 step Tab 6 k Regulation is place
37. Valve opening at start up evaporator valve capa 50 city ratio Valve at fixed position Va Va n Valve at fixed position No action No action v o Tab 9 d 9 4 Regulation alarms These are alarms that are only activated during regulation Protector alarms The alarms corresponding to the LowSH LOP MOP and High Tcond protectors are only activated during regulation when the corresponding activation threshold is exceeded and only when the timeout defined by he corresponding parameter has elapsed If a protector is not enabled integral time 0 s no alarm will be signalled If before the expiry of he 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 f the timeout relating to the regulation alarms is set to 0 s the alarm is disabled The protectors are still active however The alarms are reset automatically 39 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 c
38. ally involve setting just 4 parameters refrigerant valve type of pressure probe S1 and type of main regulation 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 regulation will be able to commence when requested by the pCO controller via pLAN or when digital input DI1 closes See paragraph 4 2 e VPM to enable regulation of the driver via VPM set Enable EVD regulation 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 regulation will be able to commence when requested by the pCO controller via pLAN or when digital input DI1 closes If due to error or for any other reason Enable EVD regulation should be set to 0 zero the driver will immediately stop regulation 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 to a later stage using the supervisor or i
39. alves 1__ free contact up to 230 Vac ni The maximum length of the connection cable to the EVBAT200 300 module is 5 m 2 solenoid valve 1 3_ alarm signal fi The connection cable to the valve motor must be 4 wire shielded AWG 18 22 4 red 2 Lmax 10m 5 black 6 blue 7_ supervision computer EVD evolution 0300005EN rel 1 0 16 06 2009 12 CAREL 3 USER INTERFACE 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 Active alarm A TI Driver powered Driver not powered Tab 3 a Awaiting completion of the initial configuration 3 1 Assemblingthe 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 regulation that the driver is performing e g superheat regulation 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
40. arameter description Def CONFIGURATION Refrigerant R404A R22 R134a R404A R407C R410A R507A R290 R600 R600a R717 R744 R728 R1270 R417A R422D Tab 4 b Valve Setting the type of valve automatically defines all the regulation parameters based on the manufacturer s data for each model In Manufacturer programming mode the regulation 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 CAREL ExV EV Alco EX4 Alco EX5 Alco EX6 Alco EX7 Alco EX8 330Hz sugge sted by CAREL Alco EX8 500Hz specified by Alco Sporlan SEI 0 5 11 Sporlan SER 1 5 20 Sporlan SEI 30 Sporlan SEI 50 Sporlan SEH 100 Sporlan SEH 175 Danfoss ETS 25B Danfoss ETS 50B Danfoss ETS 100B Danfoss ETS 250 Danfoss ETS 400 Tab 4 c 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 Parameter description Def CONFIGURATION Sensor S1 Ratiom Ratiometric OUT 0 to 5V Electronic OUT 4 to 20mA 1 to 93 1 to 4 2 barg 0 5 to 7barg barg 0 4 to 9 2 barg 0 to 10barg 1 to 9 3 barg 0 to 18 2barg 0 to 17 3 barg 0 to 25barg 0 4 to 34 2 barg
41. arget driver have incompatible firmware 11 EVD evolution 0300005EN rel 1 0 16 06 2009 2 7 General connection diagram X Gal geo i ea Se Go I Sporlan I l DANFOSS l ALCO I Ton SEI SEH SER ETS i EX5 6 I EX7 8 I I EVD Power supply module 2AT 230 Vac 24Vac po _ 3a 30VA 2AT 230 Vac 24 Vac a o 2AT op pco 30VA og ee sl mon E shield i m i gt l a AN Freres pm vi g oO Haaa shield O cores Modbus D shield RS485 gt EVDOOOOEO tLAN version EVDOOO0E1 pLAN version EVD0000E2 RS485 version Fig 2 j Key 1 white A Connection to EVBAT200 300 2 yellow B Connection to electronic pressure probe SPK 0000 or piezoresistive pressure 3 brown transducer SPKTOO CO 4 green C Connection as positioner 4 to 20 mA input 5 _ configuration computer D Connection as positioner 0 to 10 Vdc input 6 USB tLAN converter E Connection to combined pressure temperature probe SPKP00 T0 7 _ adapter 8 ratiometric pressure transducer F Connection to backup probes S3 S4 9 NTC probe G Ratiometric pressure transducer connections SPKTOO RO O digital input 1 to enable regulation H Connections o other types of v
42. ased 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 T_COND_TH TL COND TH A pat ede see N ee ON HiTcond OFF ON PID OFF ALARM OFF 1 1 i D i t gt I Fig 7 d Key T_COND Condensing temperature T_COND_ High Tcond TH threshold High High Tcond protection status ALARM Alarm Tcond PID PID superheat regulation t Time D Alarm timeout O 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 the valve will be limited if this causes an excessive decrease in the evaporation temperature EVD evolution 0300005EN rel 1 0 16 06 2009 30 CAREL 8 PARAMETERS TABLE o a
43. d measure the resistance of the windings using an ordinary tester The resistance of both should be around 36 ohms Otherwise replace the stator Finally check the electrical connections of the cable to the driver see paragraph 5 1 Valve stuck closed Use manual control after start up to completely open the valve If the superheat remains high check the electrical connections and or replace the valve The unit switches off due to low pressure during regula tion only for self contained units LOP protection disabled Set a LOP integral 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 integral time Solenoid blocked Check that the solenoid opens correctly check the electrical connections and the operation of the regulation 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 th
44. d on hold all the system and regulation alarms are ena bled however neither regulation nor the protectors can be activated Manual positioning thus has priority over any status protection of the driver 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 CAREL 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 1 This procedure is necessary as the stepper motor intrinsically tends to lose steps during movement Given that the regulation phase may last con inuously 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 he 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 he driver to perform a certain number of steps in the suitable direction to realign the valve when fully opened or closed
45. e See the table of parameters 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 if the value entered is correct the list of parameter categories is shown Configuration Probes Regulation Special Alarm configuration Valve EVD evolution 0300005EN rel 1 0 16 06 2009 14 CAREL 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 press UP DOWN to modify the value press ENTER to save the new value of the parameter repeat steps 6 7 8 to modify the other parameters 0 press Esc to exit the procedure for modifying the Manufacturer parameters Ov Cor Note all the driver parameters can be modified by entering the Manufacturer level if no button is pressed after 5 min the display automatically returns to the standard mode CAREL 4 COMMISSIONING 4 1 Commissioning Once the electrical connections have been completed see the chapter on installation and the power supply has been connected the operations required for commissioning the driver depend on the type of interface used however essenti
46. e of the unit otherwise it would be activated unnecessarily The MOP threshold is often supplied by the manufacturer of the compressor It is usually between 10 C and 15 C A Important if the closing of the valve also causes an excessive increase in the suction temperature S2 the valve will be stopped to prevent overheating the compressor windings awaiting a reduction in the refrigerant charge At the end of the MOP protection function superheat 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 3 as possible Normal operating conditions will not resume based on the The protector is activated so as to prevent too high evaporation activation of the protector but rather on the reduction in the refrigerant temperatures from stopping the compressor due to the activation of the charge that caused the increase in temperature The system will therefore high pressure switch remain in the best operating conditions a little below the threshold until the load conditions change Parameter description Def Min Max UOM ADVANCED Parameter description Def Min Max UOM High Tcond threshold 80 60 200 C F REGULATION 76 392 MOP protection thre
47. e 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 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 despite the value being opened to the maximum for centrali zed 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 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 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 doe
48. e 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 regulation 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 because of some internal arithmetics limitations of the driver it will not be possible to convert the pressure values higher than 200 barg 2900 psig and the temperature values higher than 200 C 392 F EVD evolution 0300005EN rel 1 0 16 06 2009 34 o G 5 i Parameter description Def Min Max UOM 3 n E Notes 3 GLF C High cond temp alarm timeout High Tcond 600 0 18000 S 44 171 0 alarm DISABLED C_ Low suction temperature alarm threshold 50 60 76 200 392 CHE A 26 25 C Low suct temp alarm timeout 300 0 18000 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 50
49. ection error off configuration on IDI pCO is on and working parameter LAN error EVD Network commu NET LED No message o change automatic o effect Check the network address settings tLAN RS485 Mo nication error ashing dBus Connection error NET LED No message o change automatic o effect Check the connections and that the off pCO is on and working Display connec No communi Error message o change replace the o effect Check the driver display and the tion error cation between driver di connectors driver and display splay Tab 9 a Li N 9 2 Alarm relay configuration H 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 arm relay during normal operation the relay contact is closed and LJ opens when any alarm is activated It can be used to switch off the D compressor and the system in the event of alarms Fig 24d e solenoid valve relay during normal operation the relay contact is Kev closed and is open only in standby There is no change in the event y of alarms L Phase solenoid valve relay alarm during normal operation the relay contact N Neutral is closed and opens in standby and or for LowSH MOP High Tcond COMI NOI Alarm relay output and low suction temperature alarms This is because following such alarms the user may want to protect the unit by stopping the flow of refrigerant or switch
50. ection ineffective Ifthe superheat remains low for too long with the valve that is slow to close increase the low superheat threshold and or decrease the low superheat integral time Initially set the threshold 3 C below the superheat set point with an integral time of 3 4 seconds Then gradually lower the low superheat threshold and increase the low superheat integral time checking that there is no return of liquid in any operating conditions Stator broken or connected incorrectly Disconnect the stator from the valve and the cable and measure the resistance of the windings using an ordinary tester The resistance of both should be around 36 ohms Otherwise replace the stator Finally check the electrical connections of the cable to the driver Valve stuck open Check if the superheating is always low 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 regulation set point is often reached for centralized 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 regulation temperature Liquid returns to the com pressor only after defrosting for centralized cabinets onl
51. emperature parameter High Tcond high High Tcond pro ALARM amp MOP Depends on automatic Protection action Check the LowSH alarm threshold conden tempe tection activated ashing configuration already active and timeout parameters rature parameter 37 EVD evolution 0300005EN rel 1 0 16 06 2009 CAREL Type of alarm Causeofalarm LED Display Relay Reset Effect on regu Checks solutions lation Low suction Threshold and ALARM flashing Depends on automatic No effect Check the threshold and timeout emperature timeout exceeded configuration parameters parameter EEPROM dama EEPROM for red alarm ALARM flashing Depends on Replace dri Total shutdown Replace the driver Contact service ged operating and or LED configuration ver Contact unit parameters parameter service damaged EEV motor error Valve motor fault red alarm ALARM flashing Depends on automatic nterruption Check the connections and the con LED configuration dition of the motor parameter LAN error only pLAN network green ALARM flashing Depends on automatic Regulation based Check the network address settings EVD pLAN communication ET LED configuration on DI error ashing parameter pLAN network ET LED ALARM flashing Depends on automatic Regulation based Check the connections and that the conn
52. erature NTC 10KO at 25 C 50T105 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 201115 C 4 C in the range outside of 20T115 C NTC built in 10KO 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 Power to active probes V vee 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 10T60 C lt 90 rH non condensing Storage conditions 20T70 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 Type of relay action 1C microswitching Class of insulation 2 Software class and structure A Conformity Electrical safety EN 60730 1 EN 61010 1 Electromagnetic compatibility EN 61000 6 1 EN 61000 6 2 EN 61000 6 3 EN 61000 6 4 EN61000 3 2 EN55014 1
53. es 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 Examples of operation s4 1 offset too low or function disabled S4 set point diff set point t 2 offset too high ON SV OFF t S4 set point diff set point 3 offset correct t ON SV OFF t Fig 5 i Key diff differential SV solenoid valve showcase temperature control S4 temperature CAREL EV evolution LE ru EI Fig 5 j 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 Backup probes on S3 amp S4 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
54. eue T 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 4 navigates the display screens increases decreases the value UP DOWN v e switches from the display to parameter programming mode Enter e confirms the value and returns to the list of parameters Tab 3 c n Note the variables displayed as standard can be selected by configuring the parameters Display main var 1 and Display main var 2 accordingly See the list of parameters 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 regulation selected 1 press Esc 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 4 press Esc to exit display mode EVD evolution 0300005EN rel 1 0 16 06 2009 For the complete list of the variables shown on the display see the chapter Table of parameters 3 4 Programming mode display The parameters can be modified using the front keypad Access differs according to
55. f necessary reconnecting the display To enable regulation of the driver via supervisor set Enable EVD regulation 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 regulation will be able to commence when requested by the pCO controller via pLAN or when digital input DI1 closes As highlighted on the supervisor inside of the yellow information field relating to the Enable EVD regulation parameter if due to error or for any other reason Enable EVD regulation should be set to 0 zero the driver will immediately stop regulation 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 If a pLAN tLAN or Modbus driver is used connected to a pCO family controller the setup parameters will not need to be set and confirmed In fact the application running on the pCO will manage the correct values based on the unit controlled Consequently simply set the pLAN tLAN or Modbus address for the 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 regulation The main screen
56. f the fina equipment system The CAREL product is a state of the art product whose operation is specified in the technical documentation supplied with the product or can be downloaded even prior to purchase from the website www carel com Each CAREL 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 prod
57. 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 regulation parameters accessible via password at a service installer and manufacturer level Fig 1 a USB tLAN converter code EVDCNVOOEO The USB tLAN converter is connected once the LED board cover has been removed to the service serial port underneath Fitted with cables and connectors it can connect EVD evolution 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 EVD evolution 0300005EN rel 1 0 16 06 2009 CAREL Fig 1 b Battery module code EVBAT EVBAT00200 is an electronic device that guarantees temporary power to the driver in the event of mains power failures Supplied with a 12 Vdc lead battery it delivers 22 Vdc to the driver for the time required to completely close the electronic valve being controlled while during normal operation the battery is recharged The complete module with batteries code EVBAT00300 and the box for batteries code EVBATBOX 0 are available See the appendix EVBATO0300 Battery 12 V Valve cable E2VCABS 00 IP67 Shielded cable with built in connector for co
58. he closing of digital input 1 or via the network pLAN The solenoid or the compressor are activated when the valve following the pre positioning procedure has reached the calculated position The following figure represents the sequence of events for starting regulation of the refrigeration unit Regulation 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 regulation 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 Parameter description Def Min Max UOM REGULATION Start up delay after defrost 10
59. iate 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 REGULATION LowSH protection threshold 5 40 72 set point K F superheat LowSH protection integral time 15 0 800 s ALARM CONFIGURATION Low superheat alarm timeout 300 0 18000 LowSH 0 alarm DISABLED Tab 7 b EVD evolution 0300005EN rel 1 0 16 06 2009 28 CAREL 7 PROTECTORS When the superheat value falls below the threshold the system enters low superheat status and the intensity with which the valve is closed is increased the more the superheat falls below the threshold the more intensely the valve will close The LowSH threshold must be less than or equal to the superheat set point The low superheat integral time indicates the intensity of the action the lower the value the more intense the action The integral time is set automatically based on the type of main regulation A SH Low_SH_TH i iI i ON t Low_SH i OFF cdl 1 1 l L______________ L 1 1 l ON ji 1 t A I 1 OFF a LI 1 I l T___ _ gt iD i B t lt gt Fig 7 a 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 evaporat
60. ing off the compressor The LOP alarm is excluded as in the event of low evaporation temperature closing the solenoid valve would worsen the situation 9 3 Probe alarms The probe alarms are part of the system alarms When the value measured Farameter description Del by one of the probes is outside of the field defined by the parameters Lan 9 relay corresponding to the alarm limits an alarm is activated The limits can be set independently of the range of measurement Consequently the field alarm relay opened in case of alarm i ia i outside of which the alarm is signalled can be restricted to ensure greater Solenoid valve relay open in standby valve alarm relay opened in stand by and regulation alarms safety of the controlled unit Tab 9 b Note e the alarm limits can also be set outside of the range of measurement Note if configured as an alarm relay to send the alarm signal to a o avoid unwanted probe alarms In this case the correct operation of remote device siren light connect a relay to the output according to he unit or the correct signalling of alarms will not be guaranteed the following diagram by default after having selected the type of probe used the alarm imits will be automatically set to the limits corresponding to the range of measurement of the probe EVD evolution 0300005EN rel 1 0 16 06 2009 38 CAREL
61. ion pressure LOP Low Operating Pressure The LOP protection threshold is applied as a saturated evaporation temperature value so that it can be easily compared against the technical specifications supplied by the manufacturers of the compressors The protector is activated so as to prevent too low evaporation temperatures from stopping the compressor due to the activation of the low pressure switch The protector is very useful in units with compressors on board especially multi stage where when starting or increasing capacity the evaporation temperature tends to drop suddenly When the evaporation temperature falls below the low evaporation temperature threshold the system enters LOP status and is the intensity with which the valve is opened is increased The further the temperature falls below the threshold the more intensely the valve will open The integral time indicates the intensity of the action the lower the value the more intense the action Parameter description Def Min Max UOM REGULATION LOP protection threshold 50 60 72 Protection MOP C F threshold LOP protection integral time 0 0 800 s ALARM CONFIGURATION Low evaporation temperature 300 0 18000 S alarm timeout LOP 0 alarm DISABLED Tab 7 c The integral time is set automatically based on the type of main regulation O Note e the LOP threshold must be lower then the rated evaporation temperature of the
62. lay relay open in standby valve alarm relay open in standby and regulation alarms Tab 6 f 6 2 Regulation status The electronic valve driver has 6 different types of regulation 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 regulation unit OFF e wait opening of the valve before starting regulation also called pre positioning when powering the unit and in the delay after defrosting regulation effective control of the electronic valve unit ON positioning step change in the valve position corresponding to the start of regulation when the cooling capacity of the controlled unit varies only for pLAN EVD connected to a pCO stop end of regulation with the closing of the valve corresponds to the end of temperature regulation of the refrigeration unit unit OFF 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 regulation and both aligned at 0 zero On power up first a forced closing
63. lt in probe select also the parameter relevant to the corresponding ratiometric pressure probe Parameter description Def CONFIGURATION Probe 52 CAREL NTC CAREL NTC CAREL NTC HT high T NTC built in SPKP TO 0 10 V external signal Probe S4 CAREL NTC CAREL NTC CAREL NTC HT high T NTC built in SPKP TO Tab 6 a Input 3 The auxiliary probe S3 is associated with the high condensing temperature protection or can be used as a backup probe for the main probe S1 If the probe being used is not included in the list select any 0 to 5 V ratiometric or electronic 4 to 20 mA probe and then manually modify the minimum and maximum measurement in the manufacturer parameters corresponding to the probes Important probes S3 and S4 appear as NOT USED if the auxiliary regulation parameter is set as disabled If auxiliary regulation has any other setting the manufacturer setting for the probe used will be shown which can be selected according to the type Auxiliary regulation Variable displayed High condensing temperature protection S3 Modulating thermostat S4 Backup probes 53 54 Tab 6 b Parameter description Def Configuration Probe S3 Ratiom 1 to Ratiometric OUT 0 to 5 V Electronic OUT 4 to 20 mA 9 3 barg 1 to 4 2 barg 0 5 to 7 barg 04 to 9 2 barg 0 to 10 barg 1 to 9 3 barg 0 to 18 2 bar 0 to 17 3 barg 0 to 25 barg 0 4 to 34 2 barg 0 to
64. n is reverse as the temperature increases the valve closes Parameter description Def Min Max _ UOM REGULATION Hot gas by pass temperature set point 10 60 200 C CF 76 392 PID proportional gain 15 0 800 PID integral time 150 0 1000 Js PID derivative time 5 0 800 s Tab 5 g CAREL 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 CO 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 VI V2 Fig 5 e Key CP_ Compressor V2_ Thermostatic expasnion valve GC_ Gas cooler EV_ Electronic valve E __ Evaporator IHE Inside heat exchanger V1_ Solenoid valve For the wiring see paragraph 2 7 General connection diagram This involves PID regulation without any protectors LowSH LOP MOP High Tcond see the chapter on Protectors witho
65. nal Check that the driver is NOT in stand alone mode The driver in stand alone configuration does not start regulation and the valve remains closed Check the connection of the digital input Check that when the regulation signal is sent that the input is closed correctly Check that the driver is in stand alone mode LOP protection disabled Set a LOP integral time greater than 0 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 integral time Solenoid blocked Check that the solenoid opens correctly check the electrical connections and the operation of the relay Insufficient refrigerant Check that there are no bubbles in the sight glass upstream of the expansion valve Check that the subcooling is suitable greater than 5 C otherwise charge the circuit The valve is connected incorrectly rotates in reverse and is open Check the movement of the valve by placing it in manual control and closing or ope ning it completely One complete opening must bring a decrease in the superheat and vice versa lf the movement is reversed check the electrical connections Stator broken or connected incorrectly Disconnect the stator from the valve and the cable an
66. nit 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 regulation 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 Main regulation Setting the main regulation defines the operating mode of the driver Parameter description Def CONFIGURATION Main regulation centralized Superheat regulation cabinet cold centralized cabinet cold room room self contained cabinet cold room perturbated cabinet cold room subcritical CO2 cabinet cold room R404A condenser for sub critical CO2 air conditioner chiller with plate evaporator air conditioner chiller with shell tube evaporator air conditioner chiller with battery coil evaporator air conditioner chiller with variable cooling capacity perturbed air conditioner chiller Advanced regulation EPR back pressure hot gas by pass by pressure hot gas by pass by temperature transcritical CO gas cooler analogue positioner 4 to 20 mA analogue positioner 0 to 10 V
67. nnection to the valve motor The connector code E2VCON0000 IP65 can also be purchased on its own to be wired Fig 1 d EVD evolution 0300005EN rel 1 0 16 06 2009 8 CAREL 2 INSTALLATION 2 1 DIN rail assembly and dimensions 2 3 Connection diagram superheat EVD evolution is supplied with screen printed connectors to simplify regulation wiring The shield is connected with a spade terminal CAREL EXV o S G ee See amp E V connection UUUUU Power Supply UUUUU 230 Vac 24Vac 2 AT 30VA vg im m Y amp Fi eil Key 1 green 2 yellow 3 brown 4 white 5 personal computer for configuration 6 USB tLAN converter NNANNNNNNNNNNNN i adapter Analogs Dighter input Mengoni 8 ratiometric pressure transducer evaporation pressure 2 zs aang sal i 9 NTC suction temperature 10 digital input 1 to enable regulation Fig 2 b 11 free contact up to 230 Vac s 12 solenoid valve 13 alarm signal Terminal Description G G0 Power supply O VBAT Emergency power supply Note Al Functional earth the use of the driver for the superheat regulation requires the use of the evaporation pressure probe S1 and the suction temperature probe 1 3
68. ns that may occur when starting and operating the driver and the electronic valve These cover the most common problems and are provided with the aim of offering an initial response for resolving the problem PROBLEM CAUSE SOLUTION The superheat value measu red is incorrect The probe does not measure correct values Check that the pressure and the temperature measured are correct and that the probe position is correct Check that the minimum and maximum pressure parameters for the pressure transducer set on the driver correspond to the range of the pressure probe installed Check the correct probe electrical connections The type of refrigerant set is incorrect Check and correct the type of refrigerant parameter Liquid returns to the com pressor during regulation The type of valve set is incorrect Check and correct the type of valve parameter The valve is connected incorrectly rotates in reverse and is open Check the movement of the valve by placing it in manual control and closing or ope ning it completely One complete opening must bring a decrease in the superheat and vice versa If the movement is reversed check the electrical connections The superheat set point is too low Increase the superheat set point Initially set it to 12 C and check that there is no longer return of liquid Then gradually reduce the set point always making sure there is no return of liquid Low superheat prot
69. nstalling 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 a 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 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 230Vac 2 5 Connecting the USB tLAN converter remove the LED board cover by pressing on the fastening points plug the adapter into the service serial port connect the adapter to the converter and then this in turn to the computer 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 230Vac Fig 2 e Case 3 multiple drivers connected in a network powered by different transformers with just one earth point Typical application for a series of drivers in different electrical panels 230 Vac Fig 2 h Key g 1 service serial port Fig 2 f 2 adapter 3 USB tLAN converter 4 personal comp
70. nual valve position 0 0 9999 step I 39 166 ADVANCED A_ High Tcond threshold 80 60 76 200 392 C PE A 58 57 C_ High Tcond integral time 20 0 800 S A 57 56 A odul thermost setpoint 0 60 76 200 392 C F A 61 60 A odul thermost differential 0 1 0 1 0 2 100 180 C CF A 60 59 C odul thermost SHset offset 0 0 0 100 180 K 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 ALARM CONFIGURATION C Low superheat alarm timeout LowSH 300 0 18000 S 43 170 0 alarm DISABLED C Low evap temp alarm timeout LOP 300 0 18000 S 41 168 0 alarm DISABLED C High evap temp alarm timeout MOP 600 0 18000 s 42 169 0 alarm DISABLED 33 EVD evolution 0300005EN rel 1 0 16 06 2009 CAREL User A Service installer C Manufacturer Type of variable A analogue D digital I integer 8 1 Unit of 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 Attention 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 O Note th
71. obe alarm MAX pressure 93 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 4 alarm MIN 200 392 C CF A 45 44 temp REGULATION 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 open in standby 0 0 D 23 22 0 disabled valve closed 1 enabled valve open 25 C start up delay after defrost 10 0 60 min _ 40 167 A_ Hot gas by pass temperature set point 10 60 76 200 392 C F A 28 27 A_ Hot gas by pass 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 proport gain 15 0 800 7 A 48 47 C_ PID integral time 150 0 1000 S 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 15 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 OP protection threshold 50 LOP protec 200 392 C F A 54 53 tion threshold C OP protection integral time 20 0 800 s A 53 52 A_ Enable manual valve position 0 0 1 D 24 23 A a
72. ok possible malfunctions the driver will not start until the following have been configured a en os network address refrigerant valve pressure probe S1 type of main regulation that is the type of unit the superheat regulation 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 regulation and it will be possible to enter Manufacturer programming mode and set the corresponding parameters manually EVD evolution 0300005EN rel 1 0 16 06 2009 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 a Refrigerant The type of refrigerantis essential for calculating the superheat In addition itis used to calculate the evaporation and condensing temperature based on the reading of the pressure probe P
73. on excluding consumables Approval the quality and safety of CAREL INDUSTRIES products are guaranteed by the ISO 9001 certified 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 1 0 16 06 2009 CAREL Content 1 INTRODUCTION 7 Ti Models irinin banaan aiii 7 1 2 Functions and main characteristics cssssssessssessssesssesessssesssesesseseee 7 2 INSTALLATION 9 21 DIN rail assembly and diMensionS iii 9 2 2 Description of the terminals cssssssssesssssessssossssssesesssseuesaseessssseeen 9 2 3 Connection diagram superheat regulati0n 9 DA Installato rea 10 25 Connecting the USB tLAN CONVERtEr nn 10 2 6 Upload Download and Reset parameters displaY 11 2 7 General connection Diagrarn csssscssssseessssesesssssessesesansssessssseeseeees 12 3 USER INTERFACE 13 3 1 Assembling the display board ACCESSOry 13 3 2 Display and keypad 18 3 3 Dis
74. onfiguration 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 regulation 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 configured as an alarm relay and configured as a solenoid alarm relay In the event of LOP alarms the driver relay will only open if configured as an alarm relay Parameter description Def Min Max UOM REGULATION LowSH protection threshold 5 40 72 superheat K F set point LowSH protection integral time 15 0 800 S LOP protection threshold 50 60 76 MOP thre C F shold LOP protection integral time 0 0 800 S MOP protection threshold 50 LOP th 1200 392 C F reshold OP protection integral time 20 0 800 s ADVANCED High Tcond threshold 80 60 76 200 392 C CF High Tcond integral time 20 0 800 s ALARM CONFIGURATION Low superheat alarm timeout 300
75. or chiller perturbated unit EPR back pressure hot gas by pass by pressure hot gas by pass by temperature ranscritical CO2 gas cooler Analogue positioner 0 to 10V Analogue positioner 0 to 10 V A Probe 52 CARELNTC 17 144 CAREL NTC CAREL NTC HT high temp ITC built in SPKP TO 0 to 10 V external signal A Auxiliary regulation Disabled 18 145 Disabled high condensing temperature protection on S3 probe modulating thermostat on S4 probe backup probes on 3 and S4 31 EVD evolution 0300005EN rel 1 0 16 06 2009 Parameter description Def Min Max UOM Type CAREL SVP Modbus CAREL Notes gt user Probe S3 Ratiometric OUT 0 to 5 V 1 to 4 2 barg 04 to 9 2 barg 1 to 9 3 barg 0 to 17 3 barg 0 4 to 34 2 barg 0 to 34 5 barg 0 to 45 barg Electronic OUT 4 to 20 mA 0 5 to 7 barg O to 10 barg 0 to 18 2 bar 0 to 25 barg 0 to 30 barg 0 to 44 8 barg remote 0 5 to 7 barg remote 0 to 10 barg remote 0 to 18 2 barg remote 0 to 25 barg remote 0 to 30 barg remote 0 to 44 8 barg Ratiometric 1 to 9 3 barg oO gt a Relay configuration Disabled alarm relay opened in case of alarm Solenoid valve relay open in standby valve alarm relay opened in stand by and regulation alarms Alarm relay 139 Probe S4 CAREL NTC CAREL NTC HT high temperature NTC built in SPKP TO CAREL NTC 20 47
76. or 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 e select the model from the range and load the associated list of parameters go to Configure device the list of parameters will be shown with the default settings connect the connector to the service serial port on the destination 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 http ksa carel com See the VPM On line help 45 EVD evolution 0300005EN rel 1 0 16 06 2009 CAREL EVD evolution 0300005EN rel 1 0 16 06 2009 46 CAREL CAREL INDUSTRIES HeadQuarters Via dell Industria 11 35020 Brugine Padova Italy Tel 39 049 9716611 Fax 39 049 97
77. plain all the types of regulation that can be set on EVD evolution EVD evolution 0300005EN rel 1 0 16 06 2009 18 CAREL 5 REGULATION 5 2 Superheat regulation 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 regulation The parameter that the regulation 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 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 com
78. play mode display allg 3 4 Programming mode display ssssssssseessssessussssssusssseusnsssesssseeseeses 14 4 COMMISSIONING 15 41 COMMISSIONING ssssssssssssssessssseesssssesssssessssssssusnstennsssssanessesnsesensnsseee 15 4 2 Guided commissioning procedure displaY 15 43 Checks after COMMISSIONING ssssssssseesssssessssssesesssseussssesessssesssseeen 17 AA Other UNGON Snina 17 5 REGULATION 18 51 Main and auxiliary regulation sssssssssssessssssesessssessssssesnsssesssesees 18 52 Superheat regulatiOisass iiis 18 5 3 Advanced regulation ccsssssssssssseesusssesssssssssssssssssasseussssesasaseesnseseeen 19 5 4 Auxiliary regulation sssssssssecsssseesssssesussesssssssseessssesansssesnseseesessee 22 6 FUNCTIONS 24 6 1 Inputs ANd OUtPUtS siisii niia 6 2 Regulation status 6 3 Advanced regulation status 7 PROTECTORS 28 IN POGON msasa An 28 8 PARAMETERS TABLE 31 gii Unit Of MEISUTEssissasnennsna nnn 8 2 Variables accessible via serial connection 8 3 Variables used based on the type of control 9 ALARMS 37 dl AS ice 37 9 2 Alarm relay configuration 38 93 Probe alaisensa 38 9 4 Regulation alarmS csssssssssssseesssseessssesssssssssusssssesssssesansssesnseseesseseee 39 9 5 EEV motor alarm 39 9 6 LAN error Alarm 40 9 7 LAN error alarm for tLAN and RS485 Modbus driver 40 10 TROUBLESHOOTING 41 11 TECHNI
79. pleted well before the end of the evaporator and therefore flow rate of refrigerant through the valve is insufficient This causes a reduction in cooling efficiency due to the failure to exploit part of the evaporator The valve must therefore be opened further Vice versa if the superheat temperature is low it means that the evaporation process has not concluded at the end of the evaporator and a certain quantity of liquid will still be present at the inlet to the compressor The valve must therefore be closed further The operating range of the superheat temperature is limited at the lower end if the flow rate through the valve is excessive the superheat measured will be near 0 K This indicates the presence of liquid even if the percentage of this relative to the gas cannot be quantified There is therefore un undetermined risk to the compressor that must be avoided Moreover a high superheat temperature as mentioned corresponds to an insufficient flow rate of refrigerant The superheat temperature must therefore always be greater than 0 K and have a minimum stable value allowed by the valve unit system A low superheat temperature in fact corresponds to a situation of probable instability due to the turbulent evaporation process approaching the measurement point of the probes The expansion valve must therefore be controlled with extreme precision and a reaction capacity around the superheat set point which will almost always vary from 3 to 1
80. point but ather 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 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 integral time the more intense the action will be The integral time in summary represents the intensity of the reaction of the valve especially when the superheat value is not near the set point e the derivative action is linked to the speed of variation of the superheat value that is the gradient at which the superheat changes from instant to instant It tends to react to any sudden variations bringing forward the corrective action and its intensity depends on the value of the time Td derivative time Parameter description Def Min Max UOM REGULATION Superheat set point 11 LowSH t hold 180 320 K F PID proport gain 15 0 800 PID integral 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 regulation O Note when selecting the type of main regulation both superheat regulation and special modes the PID regulation values suggested by CAREL will be automatically set for each
81. probes 53 and or S4 and setting the suitable values for the regulation 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 regulation are modified the driver will detect the modification and indicate the main regulation as Customised 17 EVD evolution 0300005EN rel 1 0 16 06 2009 5 1 Main and auxiliary regulation EVD evolution features two types of regulation e main e auxiliary Main regulation is always active while auxiliary regulation can be activated by parameter Main regulation defines the operating mode of the driver The first 10 settings refer to superheat regulation the others are so called special settings and are pressure or temperature settings or depend on a regulation signal from an external controller Parameter description Def CONFIGURATION Main regulation centralized Superheat regulation cabinet centralized cabinet cold room cold room self contained cabinet cold room perturbated cabinet cold room subcritical CO2 cabinet cold room R404A condenser for sub critical CO2 air conditioner chiller with plate evaporator air conditioner chiller with shell tube evapo
82. ption EVD0000E00 EVD evolution universal tLAN EVD0000E01 EVD evolution universal tLAN multiple pack of 10 pcs EVD0000E10 EVD evolution universal pLAN EVD0000E11 _ EVD evolution universal pLAN multiple pack of 10 pcs EVD0000E20 EVD evolution universal RS485 Modbus EVDO000E2 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 EVDOOO0E4 EVD evolution for CAREL valves pLAN multiple pack 10 pcs EVD0000E50 EVD evolution for CAREL valves RS485 Modbus EVD0000E51 EVD evolution for CAREL valves RS485 Modbus multiple pack 10 pcs u u u u E Tab 1 a The codes with multiple packages are sold without connectors available separately in code EVDCON0021 1 2 Functions and main characteristics In summary e electrical connections by plug in screw terminals e serial card incorporated in the driver based on the model tLAN pLAN RS485 Modbus compatibility with various types of valves and refrigerants e activation deactivation of regulation via digital input 1 or remote regulation via pLAN from pCO programmable controller e superheat regulation with protection functions for low superheat MOP LOP high condensing temperat
83. quentia damage of any kind whatsoever whether contractual extra contractual or due to negligence or any other liabilities deriving from the installation use or impossibility to use the product even if CAREL 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 the public or private waste collection systems defined by local legislation must be used In addition the equipment can be returned to the distributor at the end of its working life when buying new equipment 3 the equipment may contain hazardous substances the improper use or incorrect disposal of such may have negative effects on human health and on the environment 4 the symbol crossed out wheeled bin shown on the product or on the packaging and on the instruction sheet indicates that the equipment has been introduced onto the market after 13 August 2005 and that it must be disposed of separately 5 in the event of illegal disposal of electrical and electronic waste the penalties are specified by local waste disposal legislation Warranty on the materials 2 years from the date of producti
84. rator air conditioner chiller with battery coil evaporator air conditioner chiller with variable cooling capacity perturbed air conditioner chiller Advanced regulation EPR back pressure hot gas by pass by pressure hot gas by pass by temperature transcritical CO gas cooler analogue positioner 4 to 20 mA analogue positioner 0 to 10 V Note e R404A condensers with subcritical CO refer to superheat regulation for valves installed in cascading systems where the flow of R404A or other refrigerant in an exchanger acting as the CO condenser needs to be controlled e perturbated cabinet cold room or air conditioner chiller refer to units that momentarily or permanently operate with swinging condensing or evaporation pressure Tab 5 a Auxiliary regulation features the following settings Parameter description Def CONFIGURATIO Auxiliary regulation Disabled Disabled High condensing temperature protection on S3 probe Modulating thermostat on S4 probe Backup probes on 53 amp S4 Tab 5 b A Important the High condensing temperature protection and Modulating thermostat auxiliary settings can only be enabled if the main regulation is superheat regulation first 10 settings On the other hand Backup probes on S3 amp S4 can always be activated once the related probes have been connected The following paragraphs ex
85. roblems with the valve control driver secondary fluid evaporator fan pump malfunction insufficient refrigerant in the refrigerant circuit e refrigerant leaks e lack of subcooling in the condenser e electrical mechanical problems with the compressor processing residues or moisture in the refrigerant circuit Note the valve unblock procedure is nonetheless performed in each of these cases given that it does not cause mechanical or control problems Therefore also check these possible causes before replacing the valve 27 EVD evolution 0300005EN rel 1 0 16 06 2009 These are additional functions that are activated in specific situations that are potentially dangerous for the unit being controlled They feature an integral action that is the action increases gradually when moving away from the activation threshold They may add to or overlap disabling normal PID superheat regulation By separating the management of these functions from PID regulation the parameters can be set separately allowing for example normal regulation 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 4 e LowSH low superheat LOP low evaporation temperature e MOP high evaporation temperature High Tcond high condensing temperature Note The HITCond protection requires an additional
86. ry useful in self contained units if starting with a high refrigerant charge or when there are sudden variations in the load The protector is also useful in centralized 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 activation threshold The more the evaporation temperature increases with reference to the MOP threshold the more intensely the valve will close The integral time indicates the intensity ofthe action the lower the value the more intense the action T_EVAP A MOP_TH MOP_TH 1 SR peg E 1 1 OFF i I MOP ON LJ l E t PID F i M OFF I N t ALARM 1 ON 1 1 D t lt gt Fig 7 c Key T_EVAP Evaporation temperature MOP_TH MOP threshold PID PID superheat regulation ALARM Alarm MOP MOP protection t Time D Alarm timeout A Important the MOP threshold must be greater than the rated evaporation temperatur
87. s not reach the set temperature and the position of the valve is always 0 for centralized cabinets only The driver in pLAN or tLAN configuration does not start regulation 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 regulation and the valve remains closed Check the connection of the digital input Check that when the regulation signal is sent that the input is closed correctly Check that the driver is in stand alone mode Tab 10 a EVD evolution 0300005EN rel 1 0 16 06 2009 42 CAREL 11 TECHNICAL SPECIFICATIONS Power supply ni Vac 10 15 50 60 Hz to be protected by an external 2 A type T fuse Use a dedicated class 2 transformer max 100 VA max 5 m Power input 30 VA 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 AWG 18 22 Lmax 10m Digital input connection Digital input to be activated from voltage free contact or transistor to GND Closing current 5 mA Lmax 30 m Probes Lmax 10m S1 ratiometric pre
88. s performed on the hot gas by pass pressure probe value read by input S1 compared to the set point Hot gas by pass pressure set point Regulation is reverse as the pressure increases the valve closes and vice versa Parameter description Def Min _ Max UOM REGULATION Hot gas by pass pressure set point 3 20 200 barg 290 2900 psig PID proport gain 15 JO 800 PID integral time 150 0 1000 S PID derivative time 5 0 800 s Tab 5 f EVD evolution 0300005EN rel 1 0 16 06 2009 20 CAREL Hot gas by pass by temperature This regulation function can be used to control cooling capacity On a refrigerated cabinet if the ambient temperature probe measures an increase in the temperature the cooling capacity must also increase and so the valve must close Key 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 7 General connection diagram This involves PID regulation without any protectors LowSH LOP MOP High Tcond see the chapter on Protectors without any valve unblock procedure and without auxiliary regulation Regulation is performed on the hot gas by pass temperature probe value read by input S2 compared to the set point Hot gas by pass temperature set point Regulatio
89. shold 50 Protection LOP 200 C F High Tcond integral time 20 0 800 s threshold 392 ALARM CONFIGURATION MOP protection integral time 20 0 800 s High condensing temperature alarm 600 0 18000 s ALARM CONFIGURATION timeout High Tcond High evaporation temperature 600 0 18000 s 0 alarm DISABLED alarm timeout MOP Tab 7 e 0 alarm DISABLED Tab 7 d The integral time is set automatically based on the type of main The integral time is set automatically based on the type of main regulation When the evaporation temperature rises above the MOP threshold the system enters MOP status superheat regulation is interrupted to allow the pressure to be controlled and the valve closes slowly trying to limit the evaporation temperature As the action is integral it depends directly on the difference between the evaporation temperature and the 29 regulation Note e 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 centralized systems showcases where the condensing pressure is maintained constant and the status of the individual electronic valves does not affect the pressure value EVD evolution 0300005EN rel 1 0 16 06 2009 CAREL To reduce the condensing temperature the output of the refrigeration unit needs to be decre
90. ssure probe 0 to 5 V resolution 0 1 FS measurement error 2 FS maximum 1 typical electronic pressure probe 4 to 20 mA resolution 0 5 FS measurement error 8 FS maximum 7 typical combined ratiometric pressure probe 0 to 5 V resolution 0 1 FS measurement error 2 FS maximum 1 typical 4 to 20 mA input max 24 mA resolution 0 5 FS measurement error 8 FS maximum 7 typical 52 low temperature NTC 10kO at 25 C 50T90 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 G 3 C in the range 50T90 C 0 to 10 V input max 12 V resolution 0 1 FS measurement error 9 FS maximum 8 typical S3 ratiometric pressure probe 0 to 5 V resolution 0 1 FS measurement error 2 FS maximum 1 typical electronic pressure probe 4 to 20 mA resolution 0 5 FS measurement error 8 FS maximum 7 typical 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 measurement error 2 FS maximum 1 typical S4 low temp
91. thout any protectors LowSH LOP MOP High Tcond see the chapter on Protectors without any valve unblock procedure and without auxiliary regulation Regulation is performed on the pressure probe value read by input S1 compared to the set point EPR pressure set point Regulation is direct as the pressure increases the valve opens and vice versa Parameter description Def _ Min Max UOM REGULATION EPR pressure set point 3 5 20 290 200 2900 barg psig PID proport gain 15 0 800 PID integral time 150 0 1000 s PID derivative time 5 0 800 S Tab 5 e EVD evolution 0300005EN rel 1 0 16 06 2009 Hot gas by pass by pressure This regulation 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 decrease the capacity of the circuit EVD evolution 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 7 General connection diagram This involves PID regulation without any protectors LowSH LOP MOP High Tcond see the chapter on Protectors without any valve unblock procedure and without auxiliary regulation Regulation i
92. tional pressure probe is connected to 3 that measures the condensing pressure For the modulating thermostat function only available with superheat regulation an additional temperature probe is connected to S4 that measures the temperature on used to perform temperature regulation see the corresponding paragraph The last option available always 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 HITCond protection high condensing temperature The functional diagram is shown below 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 As already mentioned the HITCond protection can only be enabled ifthe controller measures the condensing pressure temperature and responds moderately by closing the valve in the event where the condensing temperature reaches excessive values to prevent the compressor from shutting down due to high pressure The condensing pressure probe must be connected to input S3 Modulating thermostat This function is used by connecting a temperature probe to input S4
93. uct should be used or stored in environments that comply with the temperature and humidity limits specified in the manual do not attempt to open the device in any way other than described in the manual donot drop hit or shake the device as the internal circuits and mechanisms may be irreparably damaged do not use corrosive chemicals solvents or aggressive detergents to clean the device e do not use the product for applications other than those specified in the technical manual All of the above suggestions likewise apply to the controllers serial boards programming keys or any other accessory in the CAREL 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 carelcom 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 conse
94. unit otherwise it would be activated unnecessarily and greater than the calibration of the low pressure switch otherwise it would be useless As an initial approximation it can be set to a value exactly half way between the two limits indicated e the protector has no purpose in centralized systems showcases where the evaporation is kept constant and the status of the individual CAREL electronic valve does not affect the pressure value e 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 ofthe motor and possible activation ofthe thermal protector The protector is ve
95. ure 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 4 to 20 mA pressure transducer the latter can be shared between a series of driver useful for centralized applications 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 if the EVBAT200 EVBAT300 accessory is fitted advanced alarm management 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
96. ure reaches the regulation 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 evaporation temperature limit for the compressors and setting the MOP integral time to a value above 0 recommended 4 seconds To make the protection more reactive decrease the MOP integral time Refrigerant charge excessive for the system or extreme transitory conditions at start up for 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 41 EVD evolution 0300005EN rel 1 0 16 06 2009 CAREL PROBLEM CAUSE SOLUTION In the start up phase the The Valve opening at start up parameter Check the calculation in reference to the ratio between the rated cooling capacity of low pressure protection is set too low the evaporator and the capacity of the valve if necessary lower the value is activated only for self contained units The driver in pLAN or does not start regula tLAN configuration ion 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 sig
97. us EVD firmware version Display firmware version Tab 8 c Digital input status 0 open 1 closed Note the readings of probes S1 52 S3 S4 are always displayed regardless of whether or not the probe is connected EVD evolution 0300005EN rel 1 0 16 06 2009 36 CAREL 9 ALARMS 9 1 Alarms There are two types of alarms system valve motor EEPROM probe and communication e regulation low superheat LOP MOP high condensing temperature low suction temperature The activation of the alarms depends on the setting of the threshold and activation delay timeout parameters Setting the timeout to 0 disables the alarms The EEPROM unit parameters and operating parameters alarm always stops regulation All the alarms are reset automatically once the causes are no longer present The alarm relay contact will open if the relay is configured as alarm relay using the corresponding parameter The signalling of the alarm event on the driver depends on whether the LED board or the display board is fitted as shown in the table below Note the alarm LED only comes on for the system alarms and not for the regulation alarms Example display system alarm on LED board ep EVD evolution Fig 9 a Note the alarm LED comes on to signal a mains power failure only if the EVBAT module accessory has been connected guaranteeing Table of alarms
98. ut any valve unblock procedure and without auxiliary regulation Regulation 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 Regulation is direct as the pressure increases the valve opens 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 regulation nor any protection LowSH LOP MOP High Tcond see the chapter on Protectors no valve unblock procedure and no auxiliary regulation ae EVD evolution a i n a N D pa 2 100 0 mA Fig 5 f Key EV_ Electronic valve a Valve opening For the wiring see paragraph 2 7 General connection diagram Forced closing will only occur when digital input DI1 opens thus switching between regulation status and standby The pre positioning and repositioning procedures are not performed Manual positioning can be enabled when regulation is active or in standby Analogue positioner 0 to 10 Vdc The valve will be positioned linearly depending on the value of the
99. uter A Important avoid installing the driver in environments with the following characteristics O Note when using the service serial port connection the VPM relative humidity greater than the 90 or condensing program can be used to configure the driver and update the driver strong vibrations or knocks and display firmware downloadable from http ksa carel com exposure to continuous water sprays See the appendix exposure to aggressive and polluting atmospheres e g sulphur EVD evolution 0300005EN rel 1 0 16 06 2009 10 CAREL 2 6 Upload Download and Reset parameters display press the Help and Enter buttons together for 5 seconds a multiple choice menu will be displayed use UP DOWN to select the required procedure confirm by pressing ENTER the display will prompt for confirmation press ENTER at the end a message will be shown to notify the operation if the operation was successful UPLOAD the display saves all the values of the parameters on the source 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 A Important the procedure must be carried out with driver powered 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 t
100. will shown on the display which can then be removed and regulation will be able to commence when requested by the pCO controller or digital input DI1 The pLAN driver is the only version that can start regulation with a signal from the pCO controller over the pLAN If there is no communication between the pCO and the driver see the paragraph LAN error alarm the driver will be able to continue regulation based on the status of digital input 1 The tLAN and RS485 Modbus drivers can be connected to a pCO controller but only in supervisor mode Regulation can only start when digital input 1 closes 15 4 2 Guided commissioning procedure display After having fitted the display Configurtion Hetuork address the first parameter is displayed press UP DUWN to modify the network address value press Enter to move to the value of the parameter Configurtion Network address n G press UP DOWN to move to the next parameter refrigerant press Enter to confirm the value repeat steps 2 3 4 5 to modify the values of the parameters refrigerant valve pressure probe S1 main regulation check that the electrical connections are correct if the configuration is correct Contiguntion exit the procedure otherwise End configuration res No choose NO and return to step 2 R pg se 4 De To simplify commissioning and an
101. y The pause in regulation after defrosting is 00 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 the LowSH threshold is greater than the superheat value measured and that he corresponding protection is activated integral time gt 0 s If necessary decrease the value of the integral time The superheat temperature measured by he driver does not reach low values but here is still return of liquid to the compres sor rack Set more reactive parameters to bring forward the closing of the valve increase the proportional factor to 30 increase the integral time to 250 s and increase the derivative time to 10 sec any 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 capacit
102. y 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 in crease the proportional band or increase the integral time Note the required stability involves a variation within 0 5 bars If this is not effective or the settings cannot be changed adopt electronic valve regulation 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 possible If not possible adopt electronic valve regulation 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 integral time by the same percentage In any case adopt parameter settings recommended for stable systems The superheat set point is too low Increase the superheat set point and check that the swings are reduced or disappear Initially set 13 C then gradually reduce the set point making sure the system does not start swinging again and that the unit temperat

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