CAREL EVD evolution EVD0000E00, EVD0000E01, EVD0000E10, EVD0000E11, EVD0000E20, EVD0000E21, EVD0000E30, EVD0000E31, EVD0000E40, EVD0000E41, EVD0000E50, EVD0000E51, EVD0002E10, EVD0002E20 electronic expansion valve driver User manual
Below you will find brief information for EVD evolution EVD0000E00, EVD evolution EVD0000E10, EVD evolution EVD0000E20, EVD evolution EVD0000E30, EVD evolution EVD0000E40, EVD evolution EVD0000E50, EVD evolution EVD0002E10, EVD evolution EVD0002E20. The EVD evolution electronic expansion valve driver 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.
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EVD evolution electronic expansion valve driver User manual NO POWER & SIGNAL CABLES TOGETHER READ CAREFULLY IN THE TEXT! Integrated Control Solutions & Energy Savings ENG DISPOSAL 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 final application, despite the product being developed according to start-of-theart techniques. The customer (manufacturer, developer or installer of the final equipment) accepts all liability and risk relating to the configuration of the product in order to reach the expected results in relation to the specific final installation and/or equipment. CAREL may, based on specific agreements, acts as a consultant for the positive commissioning of the final unit/application, however in no case does it accept liability for the correct operation of the final equipment/system. INFORMATION FOR USERS ON THE CORRECT HANDLING OF WASTE ELECTRICAL AND ELECTRONIC EQUIPMENT (WEEE) In reference to European Union directive 2002/96/EC issued on 27 January 2003 and the related national legislation, please note that: 1. WEEE cannot be disposed of as municipal waste and such waste must be collected and disposed of separately; 2. the public or private waste collection systems defined by local legislation must be used. In addition, the equipment can be returned to the distributor at the end of its working life when buying new equipment; 3. the equipment may contain hazardous substances: the improper use or incorrect disposal of such may have negative effects on human health and on the environment; 4. the symbol (crossed-out wheeled bin) shown on the product or on the packaging and on the instruction sheet indicates that the equipment has been introduced onto the market after 13 August 2005 and that it must be disposed of separately; 5. in the event of illegal disposal of electrical and electronic waste, the penalties are specified by local waste disposal legislation. 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 the best possible way for the specific application. The failure to complete such operations, which are required/indicated in the user manual, may cause the final product to malfunction; CAREL 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. Warranty on the materials: 2 years (from the date of production, excluding consumables). Approval: the quality and safety of CAREL INDUSTRIES products are guaranteed by the ISO 9001 certified design and production system, as well as by the marks (*). In addition to observing any further warnings described in this manual, the following warnings must be heeded for all CAREL products: • prevent the electronic circuits from getting wet. Rain, humidity and all types of liquids or condensate contain corrosive minerals that may damage the electronic circuits. In any case, the product should be used or stored in environments that comply with the temperature and humidity limits specified in the manual; • do not install the device in particularly hot environments. Too high temperatures may reduce the life of electronic devices, damage them and deform or melt the plastic parts. In any case, the product should be used or stored in environments that comply with the temperature and humidity limits specified in the manual; • do not attempt to open the device in any way other than described in the manual; • do not drop, hit or shake the device, as the internal circuits and mechanisms may be irreparably damaged; • do not use corrosive chemicals, solvents or aggressive detergents to clean the device; • do not use the product for applications other than those 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 product described in this document without prior warning. The technical specifications shown in the manual may be changed without prior warning. 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 & SIGNAL CABLES TOGETHER The liability of CAREL in relation to its products is specified in the CAREL general contract conditions, available on the website www.carel.com and/or by specific agreements with customers; specifically, to the extent where allowed by applicable legislation, in no case will CAREL, its employees or subsidiaries be liable for any lost earnings or sales, losses of data and information, costs of replacement goods or services, damage to things or people, downtime or any direct, indirect, incidental, actual, punitive, exemplary, special or consequential damage of any kind whatsoever, whether contractual, extra-contractual or due to negligence, or any other liabilities deriving from the installation, use or impossibility to use the product, even if CAREL or its subsidiaries are warned of the possibility of such damage. READ CAREFULLY IN THE TEXT! 3 “EVD evolution” +0300005EN - rel. 3.0 - 18.06.2010 ENG Content 1. INTRODUCTION 7 9. ALARMS 1.1 Models ............................................................................................................ 7 1.2 Functions and main characteristics ............................................................. 7 2. INSTALLATION 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 2.10 2.11 DIN rail assembly and dimensions ............................................................. 9 Description of the terminals ......................................................................... 9 Connection diagram - superheat control .................................................. 9 Installation ...................................................................................................... 10 Valve operation in parallel and complementary mode........................ 10 Shared pressure probe ................................................................................ 11 Connecting the USB-tLAN converter ........................................................ 11 Connecting the USB/RS485 converter ..................................................... 11 Upload, Download and Reset parameters (display)............................. 11 Show electrical connections (display) ...................................................... 12 General connection diagram ...................................................................... 12 3. USER INTERFACE 3.1 3.2 3.3 3.4 48 12. APPENDIX: VPM (VISUAL PARAMETER MANAGER) 49 Installation ....................................................................................................49 Programming (VPM) ....................................................................................49 Copying the setup .......................................................................................50 Setting the default parameters...................................................................50 Updating the driver and display firmware...............................................50 15 18 27 Power supply mode .....................................................................................27 Network connection .....................................................................................27 Inputs and outputs .......................................................................................27 Control status ................................................................................................28 Advanced control status ..............................................................................30 7. PROTECTORS 7.1 11. TECHNICAL SPECIFICATIONS Main and auxiliary control........................................................................... 18 Superheat control ......................................................................................... 18 Adaptive control and autotuning............................................................... 19 Control with Emerson Climate Digital Scroll™ compressor ...............20 Control with SIAM ANB scroll compressor.............................................. 21 Superheat regulation with 2 temperature probes ................................. 21 Advanced regulation ....................................................................................22 Auxiliary control ............................................................................................24 6. FUNCTIONS 6.1 6.2 6.3 6.4 6.5 46 Commissioning.............................................................................................. 15 Guided commissioning procedure (display) .......................................... 15 Checks after commissioning........................................................................17 Other functions...............................................................................................17 5. CONTROL 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 13 Alarms..............................................................................................................42 Alarm relay configuration ............................................................................43 Probe alarms ..................................................................................................43 Control alarms ...............................................................................................44 EEV motor alarm ...........................................................................................44 LAN error alarm.............................................................................................45 10. TROUBLESHOOTING 12.1 12.2 12.3 12.4 12.5 Assembling the display board (accessory).............................................. 13 Display and keypad ...................................................................................... 13 Display mode (display) ............................................................................... 14 Programming mode (display).................................................................... 14 4. COMMISSIONING 4.1 4.2 4.3 4.4 9.1 9.2 9.3 9.4 9.5 9.6 9 42 32 Protectors ........................................................................................................32 8. PARAMETERS TABLE 35 8.1 Unit of measure.............................................................................................39 8.2 Variables accessible via serial connection ...............................................40 8.3 Variables used based on the type of control ......................................... 41 5 “EVD evolution” +0300005EN - rel. 3.0 - 18.06.2010 ENG 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 CO2 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 control, special functions such as the hot gas bypass, the evaporator pressure control (EPR) and control of the valve downstream of the gas cooler in transcritical CO2 circuits. In the versions for CAREL valves, if integrated with a specific CAREL pCO controller via LAN, the driver can control one of the following: • an electronic expansion valve in a refrigerant circuit with Emerson Climate Technologies Digital Scroll™ compressor; • an electronic expansion valve in a refrigerant circuit with SIAM ANB scroll compressor. In this case the compressor must be controlled by the CAREL Power+ speed drive (with inverter), this in turn connected to the pCO controller. The EVD evolution driver can control an electronic expansion valve in a refrigerant circuit with Digital Scroll compressor, if integrated with a specific CAREL controller via LAN. In addition, it features adaptive control that can evaluate the effectiveness of superheat control and if necessary activate one or more tuning procedures. Together with superheat control, it can manage an auxiliary control function selected between condensing temperature protection and “modulating thermostat”. As regards network connectivity, the driver can be connected to either of the following: • a pCO programmable controller to manage the controller via pLAN, tLAN and RS485/Modbus®; • a PlantVisorPRO supervisor via RS485/Modbus®. In this case, On/Off control is performed via digital input 1 or 2, if suitably configured. As well as regulation start/stop, digital inputs 1 and 2 can be configured for the following: - valve regulation optimization after defrost; - discharged battery alarm management; - valve forced open (at 100%); - regulation backup; - regulation security. The second digital input is available for optimised defrost management. Another possibility involves operation as a simple positioner with 4 to 20 mA or 0 to 10 Vdc analogue input signal. EVD evolution comes with a LED board to indicate the operating status, or a graphic display (accessory) that can be used to perform installation, following a guided commissioning procedure involving setting just 4 parameters: refrigerant, valve, pressure probe, type of main control (chiller, showcase, etc.). The procedure can also be used to check that the probe and valve motor wiring is correct. Once installation is complete, the display can be removed, as it is not necessary for the operation of the driver, or alternatively kept in place to display the significant system variables, any alarms and when necessary set the control parameters. The driver can also be setup using a computer via the service serial port. In this case, the VPM program (Visual Parameter Manager) needs to be installed, downloadable from http://ksa.carel.com, and the USB-tLAN converter EVDCNV00E0 connected. Only on RS485/ Modbus® models can the installation procedure be managed as described above by computer, using the serial port (see paragraph 2.8) in place of the service serial port. The “universal” models can drive all types of valves, while the CAREL models only drive CAREL valves. 1.1 Models Code EVD0000E00 EVD0000E01 EVD0000E10 EVD0000E11 EVD0000E20 EVD0000E21 EVD0000E30 EVD0000E31 EVD0000E40 EVD0000E41 EVD0000E50 EVD0000E51 EVD0002E10 EVD0002E20 Description EVD evolution universal - tLAN EVD evolution universal - tLAN, multiple pack of 10 pcs (*) EVD evolution universal - pLAN EVD evolution universal - pLAN, multiple pack of 10 pcs (*) EVD evolution universal - RS485/Modbus® EVD evolution universal - RS485/Modbus®, multiple pack of 10 pcs (*) EVD evolution for CAREL valves - tLAN EVD evolution for CAREL valves - tLAN, multiple pack 10 pcs (*) EVD evolution for CAREL valves - pLAN EVD evolution for CAREL valves - pLAN, multiple pack 10 pcs (*) EVD evolution for CAREL valves - RS485/Modbus® EVD evolution for CAREL valves - RS485/Modbus®, multiple pack 10 pcs EVD evolution universal - pLAN opto-isolated EVD evolution universal - RS485/Modbus® opto-isolated 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: • electrical connections by plug-in screw terminals; • serial card incorporated in the driver, based on the model (tLAN, pLAN, RS485/Modbus®); • compatibility with various types of valves (“universal” models only) and refrigerants; • activation/deactivation of control via digital input 1 or remote control via pLAN, from pCO programmable controller; • superheat control with protection functions for low superheat, MOP, LOP, high condensing temperature; • adaptive superheat control; • function to optimise superheat control for air-conditioning units fitted with Emerson Climate Digital Scroll™ compressor. In this case, EVD Evolution must be connected to a CAREL pCO series controller running an application program that can manage units with Digital Scroll compressors. This function is only available on the controllers for CAREL valves; • configuration and programming by display (accessory), by computer using the VPM program or by PlantVisor/PlantVisorPro supervisor and pCO programmable controller; • commissioning simplified by display with guided procedure for setting the parameters and checking the electrical connections; • 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; • ratiometric or electronic 4 to 20 mA pressure transducer, the latter can be shared between up to 5 drivers, useful for multiplexed 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 (only for drivers with 24 Vac power supply and connected to the EVBAT00400 /EVBAT00500 accessory); • advanced alarm management. 7 “EVD evolution” +0300005EN - rel. 3.0 - 18.06.2010 ENG For software versions higher than 4.0, the following new functions have been introduced: • 24 Vac or 24 Vdc power supply, in the latter case without valve closing in the event of power failures; • pre-position time settable by parameter; • use of digital to start/stop control when there is no communication with the pCO programmable controller; • possibility to control the electronic expansion valve in a refrigerant circuit with SIAM ANB scroll compressor, controlled by CAREL Power+ speed drive (with inverter). Battery module (code EVBAT00400) Important: the EVBAT00400 battery module can only be used with 24 Vac power supply. The EVBAT00400 module is an electronic device made by CAREL which guarantees temporary power supply to the EVD0000E* driver (up to 2 drivers can be connected), in the event of a sudden power failure. It signals the battery discharged or faulty status via an open collector output, which can be used by the pCO to generate an alarm message and notify the technical service for preventive maintenance. Powered by a 12 V lead backup battery, it supplies 12 Vdc to the controller for the time required to completely close the electronic valve being controlled, while during normal operation ensures the battery is correctly recharged. The battery (code EVBAT00500) and the box (code EVBATBOX*0) can be purchased separately. Series of accessories for EVD evolution Display (code EVDIS00**0) Easily applicable and removable at any time from the front panel of the driver, during normal operation displays all the significant system variables, the status of the relay output and recognises the activation of the protection functions and alarms. During commissioning, it guides the installer in setting the parameters required to start the installation and, once completed, can copy the parameters to other drivers. The models differ in the first settable language, the second language for all models is English. EVDIS00**0 can be used to configure and monitor all the control parameters, accessible via password at a service (installer) and manufacturer level. EVBAT00400 EVBAT00500 Fig. 1.c Valve cable E2VCABS*00 (IP67) Shielded cable with built-in connector for connection to the valve motor. The connector code E2VCON0000 (IP65) can also be purchased on its own, to be wired. Fig. 1.a USB/tLAN converter (code EVDCNV00E0) The USB-tLAN converter is connected, once the LED board cover has been removed, to the service serial port underneath. Fitted with cables and connectors, it can connect EVD evolution directly to a computer, which, using the VPM program, can configure and program the driver. VPM can also be used to update the driver and display firmware. Fig. 1.d USB/RS485 converter (code CVSTDUMOR0) The converter is used to connect the configuration computer and the EVD evolution controllers, for RS485/Modbus® models only. Fig. 1.b “EVD evolution” +0300005EN - rel. 3.0 - 18.06.2010 8 ENG 2. INSTALLATION 2.1 DIN rail assembly and dimensions 2.3 Connection diagram - superheat control 4 4 2 3 1 Relay EVD evolution 45 110 12 shield 11 230 Vac 24 Vac 2 AT G G0 VBAT 1 3 2 4 Network DI2 DI1 S4 S3 S2 S1 V REF GND G G0 20VA(*) Analog – Digital Input 13 S NOA 2 COMA 3 E XV connection Power Supply CAREL EXV NO 1 1 COM 1 G G0 VBAT EVD evolution is supplied with screen-printed connectors to simplify wiring. The shield is connected with a spade terminal. GND 5 Tx/Rx 70 60 NET EVDCNV00E0 OPEN Fig. 2.a CLOSE 4 PC EEV driver EVD4 EVD4 service USB adapter 7 3 2 4 E XV connection A Power Supply DI1 DI2 S4 S2 S3 S1 GND GND Tx/Rx NO A 1 COM A VBAT G G0 2.2 Description of the terminals VREF 6 Relay A 8 9 EVD evolution 10 Fig. 2.c aa (*) in combination with Alco EX7 or EX8 valves, use a 35 VA transformer (code TRADRFE240) Key: Network DI2 DI1 S4 S3 S2 S1 V REF GND Analog – Digital Input 1 2 3 4 5 6 7 8 9 10 11 12 13 GND Tx/Rx b Fig. 2.b Terminal G, G0 VBAT Description Power supply Emergency power supply Functional earth 1,3,2,4 COM1, NO1 GND VREF S1 S2 S3 S4 DI1 DI2 Stepper motor power supply Alarm relay Earth for the signals Power to active probes Probe 1 (pressure) or 4 to 20 mA external signal Probe 2 (temperature) or 0 to 10 V external signal Probe 3 (pressure) Probe 4 (temperature) Digital input 1 Digital input 2 Terminal for tLAN, pLAN, RS485, Modbus® connection Terminal for tLAN, pLAN, RS485, Modbus® connection Terminal for pLAN, RS485, Modbus® connection service serial port (remove the cover to access ) serial port aa b green yellow brown white personal computer for configuration USB/tLAN converter adapter ratiometric pressure transducer - evaporation pressure NTC suction temperature digital input 1 configured to enable control free contact (up to 230 Vac) solenoid valve alarm signal Note: • connect the valve cable shield to the spade connector; • the use of the driver for the superheat control requires the use of the evaporation pressure probe S1 and the suction temperature probe S2, which will be fitted after the evaporator, and digital input 1/2 to enable control. As an alternative to digital input 1/2, control can be enabled via remote signal (tLAN, pLAN, RS485). For the positioning of the probes relating to other applications, see the chapter on “Control”; • inputs S1, S2 are programmable and the connection to the terminals depends on the setting of the parameters. See the chapters on “Commissioning” and “Functions”; • pressure probe S1 in the diagram is ratiometric. See the general connection diagram for the other electronic probes, 4 to 20 mA or combined; • four probes are needed for superheat control with SIAM ANB compressors, two to measure the superheat and two to measure the discharge superheat and the discharge temperature. See chap. 5. Tab. 2.b 9 “EVD evolution” +0300005EN - rel. 3.0 - 18.06.2010 ENG 2.4 Installation Important: avoid installing the driver in environments with the following characteristics: • relative humidity greater than the 90% or condensing; • strong vibrations or knocks; • exposure to continuous water sprays; • exposure to aggressive and polluting atmospheres (e.g.: sulphur and ammonia fumes, saline mist, smoke) to avoid corrosion and/or oxidation; • strong magnetic and/or radio frequency interference (avoid installing the appliances near transmitting antennae); • exposure of the driver to direct sunlight and to the elements in general. For installation proceed as follows, with reference to the wiring diagrams: 1. connect the probes: the probes can be installed a maximum distance of 10 metres away from the driver, or a maximum of 30 metres as long as shielded cables are used with minimum cross-section of 1 mm2 (connect all the shields to the earth spade connector ); 2. connect any digital inputs, maximum length 30 m; 3. connect the power cable to the valve motors: use 4-wire shielded cable 4. 5. 6. 7. AWG 22 Lmax=10 m or AWG 14 Lmax=50m; failure to connect the valve motors after connecting the driver will generate the “EEV motor error” alarm: see paragraph 9.5; carefully evaluate the maximum capacity of the relay output specified in the chapter “Technical specifications”; if necessary use a class 2 safety transformer, suitably protected against short-circuits and voltage surges. For the power ratings see the general connection diagram and the technical specifications. the minimum size of the connection cables must be 0.5 mm2 power up the driver in the event of 24 Vdc power supply the drive will close the valve. Important: When connecting the driver, the following warnings must be observed: • if the driver is used in a way not specified in this manual, the level of protection is not guaranteed. • do not operate the controller for extended periods without connecting the valve; • incorrect connection to the power supply may seriously damage the driver; • use cable ends suitable for the corresponding terminals. Loosen each screw and insert the cable ends, then tighten the screws and lightly tug the cables to check correct tightness; • separate as much as possible (at least 3 cm) the probe and digital input cables from the power cables to the loads so as to avoid possible electromagnetic disturbance. Never lay power cables and probe cables in the same conduits (including those in the electrical panels); • install the shielded valve motor cables in the probe conduits: use shielded valve motor cables to avoid electromagnetic disturbance to the probe cables; • avoid installing the probe cables in the immediate vicinity of power devices (contactors, circuit breakers, etc.). Reduce the path of the probe cables as much as possible and avoid enclosing power devices; • avoid powering the 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. Important: in the event of 24 Vdc power supply set the “Power supply mode” parameter=1 to start control. See par. 6.1. 8. program the driver, if necessary: see the chapter “User interface”; 9. connect the serial network, if featured: follow to the diagrams below for the earth connection. Case 1: multiple drivers connected in a network powered by the same transformer. Typical application for a series of drivers inside the same electrical panel. 230 Vac 24 Vac COMA NOA 1 3 2 4 G G0 VBAT COMA NOA 1 3 2 4 COMA NOA 1 3 2 4 G G0 VBAT 2 AT G G0 VBAT 2 AT 2 AT pCO 2.5 Valve operation in parallel and complementary mode Fig. 2.d EVD evolution can control two CAREL valves connected together (see paragraph 4.2), in parallel mode, with identical behaviour, or in complementary mode, whereby if one valve opens, the other closes by the same percentage. To achieve such behaviour, simply set the “valve” parameter (“Two EXV connected together”) and connect the valve motor power supply wires to the same connector. In the example shown below, for operation of valve B_2 with valve B_1 in complementary mode simply swap the connection of wires 1 and 3. Case 2: multiple drivers connected in a network powered by different transformers (G0 not connected to earth). Typical application for a series of drivers in different electrical panels. G G0 VBAT 1 3 2 4 COMA NOA COMA NOA 2 AT G G0 VBAT 2 AT 1 3 2 4 24 Vac 2 AT G G0 VBAT 24 Vac COMA NOA 230 Vac 24 Vac 1 3 2 4 230 Vac 230 Vac 2 CAREL valves connected in parallel mode 2 CAREL valves connected in complementary mode CAREL EXV VALVE A_1 CAREL EXV VALVE B_1 pCO Fig. 2.e 4 2 3 1 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 CAREL EXV VALVE B_2 4 2 1 3 4 2 3 1 COMA NOA G G0 VBAT COMA NOA 2 AT 1 3 2 4 2 AT G G0 VBAT 2 AT COMA NOA 24 Vac 1 3 2 4 24 Vac G G0 VBAT CAREL EXV VALVE A_2 230 Vac 24 Vac 1 3 2 4 230 Vac 4 2 3 1 1 3 2 4 pCO Fig. 2.f “EVD evolution” +0300005EN - rel. 3.0 - 18.06.2010 10 1 3 2 4 ENG Note: operation in parallel and complementary mode can only be used for CAREL valves, within the limits shown in the table below, where OK means that the valve can be used with all refrigerants at the rated operating pressure. Note: when using the service serial port connection, the VPM program can be used to configure the driver and update the driver and display firmware, downloadable from http://ksa.carel.com. See the appendix. Model of CAREL valve E4V* E5V* OK E4V85 with all refrigerants except NO for R410A E4V95 only with R134a E6V* E7V* 2.8 Connecting the USB/RS485 converter NO NO Only on EVD evolution RS485/Modbus® models can the configuration computer be connected using the USB/RS485 converter and the serial port, according to the following diagram. G G0 VBAT 2.6 Shared pressure probe 1 3 Only 4 to 20 mA pressure probes (not ratiometric) can be shared. The probe can be shared by a maximum of 5 drivers. For multiplexed systems where controllers EVD evolution1 to EVD evolution5 share the same pressure probe, choose the normal option for EVD evolution1 and the “remote” option for the other drivers, up to the fifth. EVD evolution6 must use another pressure probe P2. 4 NET OPEN 1 CLOSE EVD evolution EXAMPLE remote, -0.5 to 7 barg -0.5 to 7 barg (P2) Analog - Digital Input DI1 DI2 S4 GND Tx/Rx 2 Fig. 2.i GND Tx/Rx P2 1 2 personal computer for configuration USB/RS485 converter Note: • the serial port can be used for configuration with the VPM program and for updating the driver firmware, downloadable from http://ksa.carel.com; • to save time, up to 8 EVD evolution drivers can be connected to the computer, updating the firmware at the same time (each driver must have a different network address). Shared pressure probe Pressure probe 2.7 Connecting the USB-tLAN converter Procedure: • remove the LED board cover by pressing on the fastening points; • plug the adapter into the service serial port; • connect the adapter to the converter and then this in turn to the computer. • power up the driver. 2.9 Upload, Download and Reset parameters (display) Procedure: 10. press the Help and Enter buttons together for 5 seconds; 11. a multiple choice menu will be displayed, use UP/DOWN to select the required procedure; 12. confirm by pressing ENTER; 13. the display will prompt for confirmation, press ENTER; 14. at the end a message will be shown to notify the operation if the operation was successful. press EVD evo Tx/Rx shield Key: P1 P1 P2 Network GND EVD Evolution 6 GND VREF S1 S2 S3 DI1 DI2 S4 DI1 DI2 S4 GND VREF S1 S2 S3 GND Tx/Rx GND VREF S1 S2 S3 EVD Evolution 5 EVD Evolution 1 DI1 DI2 to S4 -0.5 to 7 barg (P1) S2 EVD Evolution6 S3 EVD Evolution5 S1 to VREF EVD Evolution1 GND Probe S1 Key: 2 NOA Two EXV connected OK together E3V* COMA E2V* lut ion OPEN CLOS E press • UPLOAD: the display saves all the values of the parameters on the Fig. 2.g source driver; • DOWNLOAD: the display copies all the values of the parameters to the 2 4 • RESET: all the parameters on the driver are restored to the default NOA G G0 VBAT 4 3 COMA target driver; 1 values. See the table of parameters in chapter 8. 1 NET EVDCNV00E0 JEAD69 9DLCAD69 G:H:I OPEN EVD4 service USB adapter 4 2 PC EVD4 CLOSE DI1 DI2 S4 S3 S1 VREF S2 GND 3 GND Tx/Rx Fig. 2.j Important: Fig. 2.h • the procedure must be carried out with driver powered; • DO NOT remove the display from the driver during the UPLOAD, Key: 1 2 3 4 service serial port adapter USB/tLAN converter personal computer DOWNLOAD, RESET procedure; • the parameters cannot be downloaded if the source driver and the target driver have incompatible firmware. 11 “EVD evolution” +0300005EN - rel. 3.0 - 18.06.2010 ENG 2.10 Show electrical connections (display) To display the probe and valve electrical connections for drivers A and B, enter display mode. See paragraph 3.4. 2.11 General connection diagram G G0 VBAT CAREL EXV 4 AT + 2 AT 3 G 1 3 ALCO EX5/6 EX7/8 DANFOSS ETS 16 1 14 15 2 14 4 4 3 4 4 15 15 COMA NOA 1 G0 S shield with battery 12 11 3 2 4 NOA 13 1 COMA TRADRFE240 G G0 VBAT 2 AT G G0 VBAT evolution GND EVD 2 AT pCO shield GND G G0 20 VA (*) Tx/Rx 24 Vac 230 Vac without battery 35 VA Sporlan SEI / SEH / SER 1 2 4 2 24 Vac 230 Vac G G0 VBAT EVD Battery module EVBAT00400 GND BAT ERR H EVBAT00500 pCO EVDCNV00E0 shield GND DI1 DI2 S4 S2 S3 S1 VREF GND 4 EEV driver PC EVD4 EVD4 service USB adapter 7 5 GND Tx/Rx pCO 6 Modbus® RS485 shield EVD0000E0*: tLAN version EVD0000E1*: pLAN version EVD0000E2*: RS485 version battery discharged of fault signal 17 CVSTDUM0R0 S2 S3 S4 DI1 DI2 S4 DI1 DI2 S1 3 GND Tx/Rx S2 VREF 10 S3 GND S1 9 VREF DI1 DI2 S4 S1 S3 C GND Tx/Rx GND 3 S2 GND VREF 8 B GND Tx/Rx 4 1 15 1 15 4 14 DI1 DI2 S4 S1 S3 VREF G S2 F GND Tx/Rx GND DI1 DI2 S4 S3 S2 S1 GND E VREF D GND Tx/Rx 4 Fig. 2.k (*): in combination with Alco EX7 or EX8 valves, use a 35 VA transformer code TRADRFE240. Key: 1 2 3 green yellow brown A B 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 white configuration computer USB/tLAN converter adapter ratiometric pressure transducer NTC probe digital input 1 configured to enable control free contact (up to 230 Vac) solenoid valve alarm signal red black blue configuration/supervision computer digital input 2 configured to signal discharged battery C D E Connection to EVBAT200/300 Connection to electronic pressure probe (SPK**0000) or piezoresistive pressure transducer (SPKT00**C0) Connection as positioner (4 to 20 mA input) Connection as positioner (0 to 10 Vdc input) Connection to combined pressure/temperature probe (SPKP00**T0) F G H 1 Connection to backup probes (S3, S4) Ratiometric pressure transducer connections (SPKT00**R0) Connections o other types of valves The maximum length of the connection cable to the EVBAT400/500 module is 5 m. The connection cable to the valve motor must be 4-wire shielded, AWG 18/22 2 Lmax= 10 m 3 Connect all the shields of the probe cables to the earth spade. Note: for the configuration of the digital inputs see par. 6.3. “EVD evolution” +0300005EN - rel. 3.0 - 18.06.2010 12 ENG 3. USER INTERFACE The user interface consists of 5 LEDs that display the operating status, as shown in the table: 3.2 Display and keypad The graphic display shows 2 system variables, the control status of the driver, the activation of the protectors, any alarms and the status of the relay output. 7 EVD evolution 1 Hjgg^hXVaYVb# 2 6eZgijgV kVakdaV )#.@ )) DC I BDE 6A6GB ""GZaZ 6 5 4 3 Fig. 3.c Fig. 3.a Key: LED NET OPEN CLOSE ON OFF Connection available No connection Opening valve Closing valve Active alarm - Driver powered Driver not powered Key: 1 2 3 4 5 6 7 Flashing Communication error Driver disabled (*) Driver disabled (*) Wrong power supply (see chap. Alarms) Tab. 3.a 1st variable displayed 2nd variable displayed relay status alarm (press “HELP”) protector activated control status adaptive control in progress Display writings (*) Awaiting completion of the initial configuration 3.1 Assembling the display board (accessory) The display board, once installed, is used to perform all the configuration and programming operations on the driver. It displays the operating status, the significant values for the type of control that the driver is performing (e.g. superheat control), the alarms, the status of the digital inputs and the relay output. Finally, it can save the configuration parameters for one driver and transfer them to a second driver (see the procedure for upload and download parameters). For installation: • remove the cover, pressing on the fastening points; • fit the display board, as shown; • the display will come on, and if the driver is being commissioned, the guided configuration procedure will start. ON OFF Control status Operation Standby LowSH LOP POS Positioning MOP WAIT Wait High Tcond CLOSE INIT Closing Valve motor error recognition procedure (*) Tuning in progress TUN Protection active Low superheat Low evaporation temperature High evaporation temperature High condensing temperature Tab. 3.b (*) The valve motor error recognition procedure can be disabled. See paragraph 9.5 Keypad Button Function Prg opens the screen for entering the password to access programming mode. • if in alarm status, displays the alarm queue; • in the “Manufacturer” level, when scrolling the parameters, shows the explanation screens (Help). Esc • exits the Programming (Service/Manufacturer) and Display modes; • after setting a parameter, exits without saving the changes. • navigates the display screens; • increases/decreases the value. UP/ DOWN • switches from the display to parameter programming mode; • confirms the value and returns to the list of parameters. Enter Tab. 3.c press press Fig. 3.b 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. 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 “EVD evolution” +0300005EN - rel. 3.0 - 18.06.2010 ENG 3.3 Display mode (display) Modifying the Manufacturer parameters Display mode is used to display the useful variables showing the operation of the system. The variables displayed depend on the type of control selected. 1. press Esc one or more times to switch to the standard display; 2. press UP/DOWN: the display shows a graph of the superheat, the percentage of valve opening, the evaporation pressure and temperature and the suction temperature variables; 3. press UP/DOWN: the variables are shown on the display, followed by the screens with the probe and valve motor electrical connections; 4. press Esc to exit display mode. The Manufacturer level is used to configure all the driver parameters, and consequently, in addition to the Service parameters, the parameters relating to alarm management, the probes and the configuration of the valve. See the table of parameters. Procedure: 15. press Esc one or more times to switch to the standard display; 16. press Prg : the display shows a screen with the PASSWORD request; 17. press ENTER and enter the Manufacturer level password: 66, starting from the right-most figure and confirming each figure with ENTER; 18. if the value entered is correct, the list of parameter categories is shown: - Configuration - Probes - Control - Special - Alarm configuration - Valve 19. press the UP/DOWN buttons to select the category and ENTER to access the first parameter in the category; 20. press UP/DOWN to select the parameter to be set and ENTER to move to the value of the parameter; 21. press UP/DOWN to modify the value; 22. press ENTER to save the new value of the parameter; 23. repeat steps 6, 7, 8 to modify the other parameters; 24. press Esc to exit the procedure for modifying the Manufacturer parameters. For the complete list of the variables shown on the display, see the chapter: “Table of parameters”. H=2)#.@ '&&hie +. +#)8 (#-WVg\ &#*8 Fig. 3.d 3.4 Programming mode (display) 8DC;><JG6I>DC EGD7:H 8DCIGDA HE:8>6A 6A6GB8DC;><JG6I>DC K6AK: The parameters can be modified using the front keypad. Access differs according to 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 control in general, and the protection thresholds. See the table of parameters. Procedure: 5. press Esc one or more times to switch to the standard display; 6. press Prg: the display shows a screen with the PASSWORD request; 7. press ENTER and enter the password for the Service level: 22, starting from the right-most figure and confirming each figure with ENTER; 8. if the value entered is correct, the first modifiable parameter is displayed, network address; 9. press UP/DOWN to select the parameter to be set; 10. press ENTER to move to the value of the parameter; 11. press UP/DOWN to modify the value; 12. press ENTER to save the new value of the parameter; 13. repeat steps 5, 6, 7, 8 to modify the other parameters; 14. press Esc to exit the procedure for modifying the Service parameters. Fig. 3.f Note: • all the driver parameters can be modified by entering the Manufacturer level; • if when setting a parameter the value entered is out-of-range, this is not accepted and the parameter soon after returns to the previous value; • if no button is pressed, after 5 min the display automatically returns to the standard mode. E6HHLDG9 %%%& Fig. 3.e Note: • if when setting a parameter the value entered is out-of-range, this is not accepted and the parameter soon after returns to the previous value; • if no button is pressed, after 5 min the display automatically returns to the standard mode; • to set a negative value move to the left-most digit and press Up/Down. “EVD evolution” +0300005EN - rel. 3.0 - 18.06.2010 14 ENG 4. COMMISSIONING 4.1 Commissioning 4.2 Guided commissioning procedure (display) 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 essentially involve setting just 4 parameters: refrigerant, valve, type of pressure probe S1 and type of main control. Types of interfaces: • DISPLAY: after having correctly configured the setup parameters, confirmation will be requested. Only after confirmation will the driver be enabled for operation, the main screen will be shown on the display and control will be able to commence when requested by the pCO controller via LAN or when digital input DI1/DI2 closes. See paragraph 4.2; • VPM: to enable control of the driver via VPM, set “Enable EVD control” to 1; this is included in the safety parameters, in the special parameters menu, under the corresponding access level. However, the setup parameters should first be set in the related menu. The driver will then be enabled for operation and control will be able to commence when requested by the pCO controller via LAN or when digital input DI1/ DI2 closes. If due to error or for any other reason “Enable EVD control” should be set to 0 (zero), the driver will immediately stop control and will remain in standby until re-enabled, with the valve stopped in the last position; • 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, if necessary, reconnecting the display. To enable control of the driver via supervisor, set “Enable EVD control”; this is included in the safety parameters, in the special parameters menu, under the corresponding access level. However, the setup parameters should first be set in the related menu. The driver will then be enabled for operation and control will be able to commence when requested by the pCO controller via pLAN or when digital input DI1/DI2 closes. As highlighted on the supervisor, inside of the yellow information field relating to the “Enable EVD control” parameter, if due to error or for any other reason “Enable EVD control” should be set to 0 (zero), the driver will immediately stop control and will remain in standby until re-enabled, with the valve stopped in the last position; • pCO PROGRAMMABLE CONTROLLER: the first operation to be performed, if necessary, is to set the network address using the display. 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 control. The main screen will shown on the display, which can then be removed, and control will be able to commence when requested by the pCO controller or digital input DI1/DI2. If there is no communication between the pCO and the driver (see the paragraph “LAN error alarm”), the driver will be able to continue control based on the status of digital input DI1/DI2. See par. 6.3. After having fitted the display: 8dc[^\jgi^dc&$( 8dc[^\jgi^dc&$( CZildg`VYYgZhh CZildg`VYYgZhh &.- &.- the first parameter is displayed: press UP/DOWN to modify the network address; value press Enter to move to the value of the parameter 8dc[^\jgi^dc&$( CZildg`VYYgZhh & press Enter to confirm the value press UP/DOWN to move to the next parameter, refrigerant repeat steps 2, 3, 4, 5 to modify the values of the parameters: 1 3 2 4 PRESS S1 G G0 VBAT TEMP S2 white black green COM1 NO1 DI2 green brown yellow white GND TxRx S3 S4 DI1 GND VREF S1 S2 refrigerant, valve, pressure probe S1, main regulation; check that the electrical connections are correct; if the configuration is correct 8dc[^\jgi^dc :cYXdc[^\jgVi^dc4 N:HCD exit the procedure, otherwise choose NO and return to step 2; At the end of the configuration procedure the controller activates the valve motor error recognition procedure, showing “INIT” on the display. See paragraph 9.5 To simplify commissioning and avoid possible malfunctions, the driver will not start until the following have been configured: 1. network address; 2. refrigerant; 3. valve; 4. pressure probe S1; 5. type of main control, that is, the type of unit the superheat control is applied to. Note: • to exit the guided commissioning procedure press the DOWN button repeatedly and finally confirm that configuration has been completed. The guided procedure CANNOT be ended by pressing Esc; • if the configuration procedure ends with a configuration error, access Service parameter programming mode and modify the value of the parameter in question; • if the valve and/or the pressure probe used are not available in the list, select any model and end the procedure. Then the driver will be enabled for control, and it will be possible to enter Manufacturer programming mode and set the corresponding parameters manually. Important: for 24 Vdc power supply, at the end of the guided commissioning procedure, to start control set “Power supply mode” parameter=1, otherwise the valve remains in the closed position. See paragraph 6.1. 15 “EVD evolution” +0300005EN - rel. 3.0 - 18.06.2010 ENG Network address Parameter/description CONFIGURATION Sensor S1 Ratiometric (OUT=0 to 5V) 1= -1 to 4.2 barg 2= 0.4 to 9.3 barg 3= -1 to 9.3 barg 4= 0 to 17.3 barg 5= 0.85 to 34.2 barg 6= 0 to 34.5 barg 7= 0 to 45 barg The network address assigns to the driver an address for the serial connection to a supervisory system via RS485, and to a pCO controller via pLAN, tLAN, Modbus®. Parameter/description Def. Min. Max. UOM CONFIGURATION Network address 198 1 207 - Tab. 4.d For network connection of the RS485/Modbus® models the communication speed also needs to be set, in bits per second, using the parameter “Network settings”. See paragraph 6.1. Refrigerant The type of refrigerant is essential for calculating the superheat. In addition, it is used to calculate the evaporation and condensing temperature based on the reading of the pressure probe. Parameter/description Def. Tab. 4.g Important: in case two pressure probes are installed S1 and S3, they must be of the same type. It is not allowed to use a ratiometric probe and an electronic one. Note: in the case of multiplexed systems where the same pressure probe is shared between multiple drivers, choose the normal option for the first driver and the “remote” option for the remaining drivers. The same pressure transducer can be shared between a maximum of 5 drivers. Valve Setting the type of valve automatically defines all the control parameters based on the manufacturer’s data for each model. In Manufacturer programming mode, the control parameters can then be fully customised if the valve used is not in the standard list. In this case, the driver will detect the modification and indicate the type of valve as “Customised”. Parameter/description Def. Example: to use the same pressure probe, -0.5 to 7 bars, for 3 drivers For the first driver, select: -0.5 to 7 barg For the second and third driver select: remote -0.5 to 7 barg. See paragraph 2.6 Note: CAREL EX V • 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 unit of measure is changed (from bars to psi), the driver automatically updates in limits of the range of measurement and the alarm limits.BY default, the main control probe S2 is set as “CAREL NTC”. Other types of probes can be selected in the service menu. Tab. 4.f Important: • two CAREL EXV valves connected together must be selected if two CAREL EXV valves are connected to the same terminal, to have parallel or complementary operation; • as described, control is only possible with CAREL EXV valves; • not all CAREL valves can be connected: see paragraph 2.5. • 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. 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. “EVD evolution” +0300005EN - rel. 3.0 - 18.06.2010 Ratiom.: Electronic (OUT=4 to 20mA) -1 to 9.3 8= -0.5 to 7 barg barg 9= 0 to 10 barg 10= 0 to 18,2 barg 11= 0 to 25 barg 12= 0 to 30 barg 13= 0 to 44.8 barg 14= remote, -0.5 to 7 barg 15= remote, 0 to 10 barg 16= remote, 0 to 18,2 barg 17= remote, 0 to 25 barg 18= remote, 0 to 30 barg 19= remote, 0 to 44.8 barg 20= external signal (4 to 20 mA) 21= -1 to 12.8 barg 22= 0 to 20.7 barg 23= 1.86 to 43.0 barg CONFIGURATION Refrigerant: R404A 1= R22; 2= R134a; 3= R404A; 4= R407C; 5= R410A;6= R507A; 7= R290; 8= R600; 9= R600a; 10= R717; 11= R744; 12= R728; 13= R1270; 14= R417A; 15= R422D; 16= R413A; 17= R422A; 18= R423A; 19= R407A; 20= R427A Tab. 4.e CONFIGURATION Valve: 1= CAREL EXV; 2= Alco EX4; 3= Alco EX5; 4= Alco EX6; 5= Alco EX7; 6= Alco EX8 330Hz suggested by CAREL; 7= Alco EX8 500Hz specified by Alco; 8= Sporlan SEI 0.5-11; 9= Sporlan SER 1.5-20; 10= Sporlan SEI 30; 11= Sporlan SEI 50; 12= Sporlan SEH 100; 13= Sporlan SEH 175; 14= Danfoss ETS 12.5-25B; 15= Danfoss ETS 50B; 16= Danfoss ETS 100B; 17= Danfoss ETS 250; 18= Danfoss ETS 400; 19= two CAREL ExV connected together 20= Sporlan Ser(I)G, J, K. Def. 16 ENG Main regulation Setting the main control defines the operating mode of the driver. Parameter/description Def. CONFIGURATION Main control multiplexed Superheat control cabinet/cold 1= multiplexed cabinet/cold room room 2= cabinet/cold room with on-board compressor 3= “perturbed” cabinet/cold room 4= cabinet/cold room with subcritical CO2 5= R404A condenser for subcritical CO2 6= air-conditioner/chiller with plate heat exchanger 7= air-conditioner/chiller with tube bundle heat exchanger 8= air-conditioner/chiller with finned coil heat exchanger 9= air-conditioner/chiller with variable cooling capacity 10= “perturbed” air-conditioner/chiller Advanced control 11= EPR back pressure 12= hot gas bypass by pressure 13= hot gas bypass by temperature 14= transcritical CO2 tgas cooler 15= analogue positioner (4 to 20 mA) 16= analogue positioner (0 to 10 V) 17= air-conditioner/chiller or cabinet/cold room with adaptive control 18= air-conditioner/chiller with digital scroll compressor (*) 19= AC/chiller with SIAM ANB scroll compressor(*) 20= superheat regulation with 2 temperature probes 21= I/O expander for pCO Tab. 4.h (*) CAREL valve drivers only The superheat set point and all the parameters corresponding to PID control, the operation of the protectors and the meaning and use of probes S1 and/or S2 will be automatically set to the values recommended by CAREL based on the selected application. During this initial configuration phase, only superheat control mode from 1 to 10 can be set, which differ based on the application (chiller, 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. 4.3 Checks after commissioning After commissioning: • check that the valve completes a full closing cycle to perform alignment; • set, if necessary, in Service or Manufacturer programming mode, the superheat set point (otherwise keep the value recommended by CAREL based on the application) and the protection thresholds (LOP, MOP, etc.). See the chapter on Protectors. 4.4 Other functions By entering Service programming mode, other types of main control can be selected (transcritical CO2, hot gas bypass, etc.), as well as socalled advanced control functions, which do not involve the superheat, activating auxiliary controls that use probes S3 and/or S4 and setting the suitable values for the control set point and the LowSH, LOP and MOP protection thresholds (see the chapter on “Protectors”), which depend on the specific characteristics of the unit controlled. By entering Manufacturer programming mode, finally, the operation of the driver can be completely customised, setting the function of each parameter. If the parameters corresponding to PID control are modified, the driver will detect the modification and indicate the main control as “Customised”. 17 “EVD evolution” +0300005EN - rel. 3.0 - 18.06.2010 ENG 5. CONTROL 5.1 Main and auxiliary control 5.2 Superheat control EVD evolution features two types of control • main; • auxiliary. Main control is always active, while auxiliary control can be activated by parameter. Main control defines the operating mode of the driver. The first 10 settings refer to superheat control, the others are so-called “special” settings and are pressure or temperature settings or depend on a control signal from an external controller. The two last advanced functions also relate to superheat control. The primary purpose of the electronic valve is ensure that the flow-rate of refrigerant that flows through the nozzle corresponds to the flow-rate required by the compressor. In this way, the evaporation process will take place along the entire length of the evaporator and there will be no liquid at the outlet and consequently in the branch that runs to the compressor. As liquid is not compressible, it may cause damage to the compressor and even breakage if the quantity is considerable and the situation lasts some time. Superheat control Parameter/description CONFIGURATION Main control Superheat control 1= multiplexed cabinet/cold room 2= cabinet/cold room with on-board compressor 3= “perturbed” cabinet/cold room 4= cabinet/cold room with subcritical CO2 5= R404A condenser for subcritical CO2 6= air-conditioner/chiller with plate heat exchanger 7= air-conditioner/chiller with tube bundle heat exchanger 8= air-conditioner/chiller with finned coil heat exchanger 9= air-conditioner/chiller with variable cooling capacity 10= “perturbed” air-conditioner/chiller Advanced control 11= EPR back pressure 12= hot gas bypass by pressure 13= hot gas bypass by temperature 14= gas cooler CO2 transcritical 15= analogue positioner (4 to 20 mA) 16= analogue positioner (0 to 10 V) 17= air-conditioner/chiller or cabinet/ cold room with adaptive control 18= air-conditioner/chiller with digital scroll compressor 19= AC/chiller with SIAM ANB scroll compressor(*) 20= superheat regulation with 2 temperature probes 21= I/O expander for pCO Def. The parameter that the control of the electronic valve is based on is the superheat temperature, which effectively tells whether or not there is liquid at the end of the evaporator. The 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). multiplexed cabinet/ cold room Superheat= Superheated gas temperature(*) – Saturated evaporation temperature (*) suction If the superheat temperature is high it means that the evaporation process is completed well before the end of the evaporator, and therefore flow-rate of refrigerant through the valve is insufficient. This causes a reduction in cooling efficiency due to the failure to exploit part of the evaporator. The valve must therefore be opened further. Vice-versa, if the superheat temperature is low it means that the evaporation process has not concluded at the end of the evaporator and a certain quantity of liquid will still be present at the inlet to the compressor. The valve must therefore be closed further. The operating range of the superheat temperature is limited at the lower end: if the flow-rate through the valve is excessive the superheat measured will be near 0 K. This indicates the presence of liquid, even if the percentage of this relative to the gas cannot be quantified. There is therefore un undetermined risk to the compressor that must be avoided. Moreover, a high superheat temperature as mentioned 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 14 K. Set point values outside of this range are quite infrequent and relate to special applications. Tab. 5.a (*) only for CAREL valve drivers Note: • R404A condensers with subcritical CO2 refer to superheat control for valves installed in cascading systems where the flow of R404A (or other refrigerant) in an exchanger acting as the CO2 condenser needs to be controlled; • perturbated cabinet/cold room or air-conditioner/chiller refer to units that momentarily or permanently operate with swinging condensing or evaporation pressure. Auxiliary control features the following settings: Parameter/description CONFIGURATION Auxiliary control Disabled High condensing temperature protection on S3 probe Modulating thermostat on S4 probe Backup probes on S3 & S4 Def. C Disabled L Tab. 5.b EVD evolution CP S1 S2 F Important: the “High condensing temperature protection” and “Modulating thermostat” auxiliary settings can only be enabled if the main control is also superheat control with settings 1 to 10 and 17, 18. On the other hand, the “Backup probes on S3 and S4” auxiliary control can be activated, once the corresponding probes have been connected, only for settings from 1 to 18. S M E V EEV P The following paragraphs explain all the types of control that can be set on EVD evolution. Fig. 5.a “EVD evolution” +0300005EN - rel. 3.0 - 18.06.2010 18 T ENG Key: CP C L F S compressor condenser liquid receiver dewatering filter liquid indicator EEV V E P T Parameter/description CONTROL LowSH protection threshold electronic expansion valve solenoid valve evaporator pressure probe (transducer) temperature probe For the wiring, see paragraph 2.7 “General connection diagram”. Note: superheat control in a refrigerant circuit with SIAM scroll compressor requires two probes for superheat control and two probes downstream of the compressor for discharge superheat and discharge temperature control. See par. 5.5. Def. Min. Max. 5 -40 (-72) LowSH protection integration time LOP protection threshold 15 0 superh. K(°F) set point. 800 s -50 -60 (-76) LOP protection integration time MOP protection threshold 0 50 0 LOP threshold 0 MOP protection integration time 20 ADVANCED High Tcond threshold 80 High Tcond integration time 20 -60 (-76) 0 PID parameters Superheat control, as for any other mode that can be selected with the “main control” parameter, is performed using PID control, which in its simplest form is defined by the law: Integration time Derivative time Note that regulation is calculated as the sum of three separate contributions: proportional, integral and derivative. • the proportional action opens or closes the valve proportionally to the variation in the superheat temperature. Thus the greater the K (proportional gain) the higher the response speed of the valve. The proportional action does not consider the superheat set point, but rather only reacts to variations. Therefore if the superheat value does not vary significantly, the valve will essentially remain stationary and the set point cannot be reached; • the integral action is linked to time and moves the valve in proportion to the deviation of the superheat value from the set point. The greater the deviations, the more intense the integral action; in addition, the lower the value of T (integration time), the more intense the action will be. The integration time, in summary, represents the intensity of the reaction of the valve, especially when the superheat value is not near the set point; • the derivative action is linked to the speed of variation of the superheat value, that is, the gradient at which the superheat changes from instant to instant. It tends to react to any sudden variations, bringing forward the corrective action, and its intensity depends on the value of the time Td (derivative time). Parameter/description CONTROL Superheat set point PID proport. gain PID integration time PID derivative time Def. Min. Max. UOM 11 15 150 5 LowSH: t.hold 0 0 0 180 (320) 800 1000 800 K (°F) s s Tab. 5.c 800 s 200 (392) °C (°F) 800 s Tab. 5.d EVD evolution features two functions used to automatically optimise the PID parameters for superheat control, useful in applications where there are frequent variations in thermal load: 1. automatic adaptive control: the function continuously evaluates the effectiveness of superheat control and activates one or more optimisation procedures accordingly; 2. manual autotuning: this is activated by the user and involves just one optimisation procedure. Both procedures give new values to the PID superheat control and protection function parameters: - PID: proportional gain; - PID: integration time; - PID: derivative time; - LowSH: low superheat integration time; - LOP: low evaporation temperature integration time; - MOP: high evaporation temperature integration time; - HiTcond: high condensing temperature integration time. Given the highly variable dynamics of superheat control on different units, applications and valves, the theories on stability that adaptive control and autotuning are based on are not always definitive. As a consequence, the following procedure is suggested, in which each successive step is performed if the previous has not given a positive outcome: 1) use the parameters recommended by CAREL to control the different units based on the values available for the “Main control” parameter; 2) use any parameters tested and calibrated manually based on laboratory or field experiences with the unit in question; 3) enable automatic adaptive control; 4) activate one or more manual autotuning procedures with the unit in stable operating conditions if adaptive control generates the “Adaptive control ineffective” alarm. Key: Ti Td MOP th- °C(°F) reshold 800 s 200 (392) °C(°F) 5.3 Adaptive control and autotuning 1 de(t) u(t)= K e(t) +T ∫e(t)dt + Td dt i u(t) Valve position e(t) Error K Proportional gain UOM Adaptive control After having completed the commissioning procedure, to activate adaptive control, set the parameter: “Main control”= air-conditioner/chiller or showcase/cold room with adaptive control. Parameter/description See the “EEV system guide” +030220810 for further information on calibrating PID control. Def. CONFIGURATION Main control ... air-conditioner/chiller or cabinet/cold room with adaptive control Note: when selecting the type of main control (both superheat control and special modes), the PID control values suggested by CAREL will be automatically set for each application. multiplexed cabinet/cold room Tab. 5.e The activation status of the tuning procedure will be shown on the standard display by the letter “T”. Protector control parameters See the chapter on “Protectors”. Note that the protection thresholds are set by the installer/manufacturer, while the times are automatically set based on the PID control values suggested by CAREL for each application. 19 “EVD evolution” +0300005EN - rel. 3.0 - 18.06.2010 ENG • both the tuning procedure and adaptive control can only be enabled )#.@ 6eZgijgV kVakdaV )) for superheat control, they cannot be used for the advanced control functions; DC Hjgg^hXVaYVb# I For CAREL internal use only, some tuning procedure control parameters can be shown on the display, supervisor, pCO and VPM; these must not be modified by non-expert users. These are: - Tuning method - Adaptive control status - Last tuning result ""GZaZ Tuning method is visible as a parameter in the Special category, the two other parameters are visible in display mode. See paragraph 3.3. With adaptive control enabled, the controller constantly evaluates whether control is sufficiently stable and reactive; otherwise the procedure for optimising the PID parameters is activated. The activation status of the optimisation function is indicated on the standard display by the message “TUN” at the top right. Parameter/Description ADVANCED Tuning method The PID parameter optimisation phase involves several operations on the valve and readings of the control variables so as to calculate and validate the PID parameters. These procedures are repeated to fine-tune superheat control as much as possible, over a maximum of 12 hours. Def. Min. Max. UoM 0 0 255 - Tab. 5.g Note: the “Tuning method” parameter is for use by qualified CAREL technical personnel only and must not be modified. Note: • during the optimisation phase maintenance of the superheat set point 5.4 ControlwithEmersonClimateDigitalScroll™ compressor is not guaranteed, however the safety of the unit is ensured through activation of the protectors. If these are activated, the procedure is interrupted; • if all the attempts performed over 12 hours are unsuccessful, the “adaptive control ineffective” alarm will be signalled and adaptive control will be disabled, resetting the default values of the PID and protection function parameters; • to deactivate the “adaptive control ineffective” alarm set the value of the “main control” parameter to one of the first 10 options. If required, adaptive control can be immediately re-enabled using the same parameter. If the procedure ends successfully, the resulting control parameters will be automatically saved. Important: this type of control is incompatible with adaptive control and autotuning. Digital Scroll compressors allow wide modulation of cooling capacity by using a solenoid valve to active a patented refrigerant bypass mechanism. This operation nonetheless causes swings in the pressure of the unit, which may be amplified by normal control of the expansion valve, leading to malfunctions. Dedicated control ensures greater stability and efficiency of the entire unit by controlling the valve and limiting swings based on the instant compressor modulation status. To be able to use this mode, the pLAN version driver must be connected to a Carel pCO series controller running a special application to manage units with Digital scroll compressors. Autotuning EVD evolution also features an automatic tuning function (Autotuning) for the superheat and protector control parameters, which can be started by setting the parameter “Force manual tuning” = 1. Parameter/Description Def. Min. Max. UoM ADVANCED Force manual tuning 0 = no; 1= yes 0 0 1 Parameter/Description CONFIGURATION Main control ... air-conditioner/chiller with Digital Scroll compressor - Tab. 5.f The activation status of the procedure is indicated on the standard display by the message “TUN” at the top right. Hjgg^hXVaYVb# )#.@ 6eZgijgV kVakdaV )) Def. multiplexed cabinet/cold room Tab. 5.h C IJC L ""GZaZ EVD evolution F S1 S2 CP The optimisation procedure can only be performed if the driver is in control status, and lasts from 10 to 40 minutes, performing specific movements of the valve and measurements of the control variables. S V Note: • during the function, maintenance of the superheat set point is not guaranteed, however the safety of the unit is ensured through activation of the protectors. If these are activated, the procedure is interrupted; • if, due to external disturbance or in the case of particularly unstable systems, the procedure cannot suitably optimise the parameters, the controller will continue using the parameters saved in the memory before the procedure was started. If the procedure ends successfully, the resulting control parameters will be automatically saved. “EVD evolution” +0300005EN - rel. 3.0 - 18.06.2010 M E EV P Fig. 5.b 20 T ENG Key: Inviluppo ⁄ Envelope Compressor Condenser Liquid receiver Dewatering filter Liquid gauge V V2 EV E P Solenoid valve Thermostatic expansion valve Electronic valve Evaporator Pressure probe Temperatura di condensazione (C°) Condensing temperature (C°) CP C L F S For information on the wiring see paragraph 2.11 “General connection diagram”. Note: this function is only available for CAREL valve drivers. 5.5 Control with SIAM ANB scroll compressor Important: this type of control is incompatible with adaptive control and autotuning. Temperatura di evaporazione (C°) Evaporation temperature (C°) To be able to use this control function, only available for CAREL valve drivers, the driver must be connected to a CAREL pCO programmable controller running an application able to manage a unit with SIAM ANB scroll compressor. In addition, the compressor must be controlled by the CAREL Power+ “speed drive” (with inverter), specially designed to manage the speed profile required by the compressor operating specifications. Two probes are needed for superheat control (PA, TA) plus two probes located downstream of the compressor (PB, TB) for discharge superheat and discharge temperature (TB) control. Parameter/Description CONFIGURATION Main control … AC/chiller with SIAM ANB compressor Fig. 5.d The pCO controller defines the current set point according to the point of operation within the envelope: • superheat setpoint; • discharge superheat setpoint; • discharge temperature setpoint. Def. Min. Def. Parameter/Description ADVANCED Superheat setpoint 11 multiplexed showcase/cold room Discharge superheat setpoint Discharge temperature setpoint 35 105 LowSH: 180 (324) K (°F) threshold -40 (-72) 180 (324) K (°F) -60 (-76) 200 (392) °C (°F) Tab. 5.j Tab. 5.i Max. UOM Note: • this control function is only available CAREL valve drivers. • no set point needs to be configured by the user. C TB L PB 5.6 Superheat regulation with 2 temperature probes POWER + speed drive EVD evolution S1 S2 S3 S4 F 0V + - 1 3 2 The functional diagram is shown below. This type of control must be used with care, due to the lower precision of the temperature probe compared to the probe that measures the saturated evaporation pressure. CP GND Tx/Rx shield S V M Modbus® RS485 E PA TA GND EV Parameter/Description CONFIGURATION Main control … superheat regulation with 2 temperature probes Def. multiplexed showcase/cold room Tab. 5.k pCO shield Fig. 5.c Key: CP C L F TA, TB Compressor Condenser Liquid receiver Dewatering filter Temperature probes V S EV E PA, PB Solenoid valve Liquid gauge Electronic valve Evaporator Pressure probes For information on the wiring see paragraph 2.11 “General connection diagram”. To optimise performance of the refrigerant circuit, compressor operation must always be inside a specific area, called the envelope, defined by the compressor manufacturer. 21 “EVD evolution” +0300005EN - rel. 3.0 - 18.06.2010 ENG For the wiring, see paragraph 2.11 “General connection diagram”. C This involves PID control without any protectors (LowSH, LOP, MOP, High Tcond, see the chapter on Protectors), without any valve unblock procedure and without auxiliary control. Control is performed on the pressure probe value read by input S1, compared to the set point: “EPR pressure set point”. Control is direct, as the pressure increases, the valve opens and vice-versa. L EVD evolution CP S4 S2 F Parameter/description CONTROL EPR pressure set point PID proport. gain PID integration time PID derivative time S M EV T E V S EV E UOM 3.5 15 150 5 -20 (-290) 0 0 0 200 (2900) 800 1000 800 barg (psig) s s Tab. 5.m This control function can be used to control cooling capacity. If there is no request from circuit B, the compressor suction pressure decreases and the bypass valve opens to let a greater quantity of hot gas flow and decrease the capacity of the circuit. Key: Compressor Condenser Liquid receiver Dewatering filter Temperature probe Max. Hot gas bypass by pressure T CP C L F T Min. Solenoid valve Liquid gauge Electronic valve Evaporator C L Parameter/Description ADVANCED Superheat setpoint Def. Min. Max. 11 180 (324) K (°F) PID: proportional gain PID: integral time PID: derivative time 15 150 5 LowSH: threshold 0 0 0 800 1000 800 EV UOM CP F EVD evolution S s s S1 V Def. P Tab. 5.l EPR back pressure This type of control can be used in many applications in which a constant pressure is required in the refrigerant circuit. For example, a refrigeration system may include different showcases that operate at different temperatures (showcases for frozen foods, meat or dairy). The different temperatures of the circuits are achieved using pressure regulators installed in series with each circuit. The special EPR function (Evaporator Pressure Regulator) is used to set a pressure set point and the PID control parameters required to achieve this. V1 V2 T CP C L F S V1 V2 S1 P EV Fig. 5.e Solenoid valve E Thermostatic expasnion valve EV Evaporator Electronic valve “EVD evolution” +0300005EN - rel. 3.0 - 18.06.2010 V1 V2 E Compressor Condenser Liquid receiver Dewatering filter Liquid indicator V1 V2 EV E Solenoid valve Thermostatic expasnion valve Electronic valve Evaporator This involves PID control without any protectors (LowSH, LOP, MOP, High Tcond, see the chapter on Protectors), without any valve unblock procedure and without auxiliary control. Control is performed on the hot gas bypass pressure probe value read by input S1, compared to the set point: “Hot gas bypass pressure set point”.Control is reverse, as the pressure increases, the valve closes and vice-versa. Parameter/description Def. Min. Max. UOM EV Key: V1 V2 T For the wiring, see paragraph 2.11 “General connection diagram”. P E M Fig. 5.f EVD evolution M V2 Key: S1 E V1 E B EVD evolution T T A 5.7 Advanced regulation M M 22 CONTROL Hot gas bypass pressure set point 3 PID proport. gain PID integration time PID derivative time 15 150 5 -20 (290) 0 0 0 200 (2900) 800 1000 800 barg (psig) s s Tab. 5.n ENG Hot gas bypass by temperature This control function can be used to control cooling capacity. On a refrigerated cabinet, if the ambient temperature probe measures an increase in the temperature, the cooling capacity must also increase, and so the valve must close. EV_2 C C EV_1 CP EVD evolution s EV S1 S2 L V3 T F CP EVD evolution S2 S M T V1 V2 V1 V2 Fig. 5.h Key: CP Key: Compressor Condenser Liquid receiver Dewatering filter Liquid indicator T T E Fig. 5.g CP C L F S E M V1 V2 EV E C V1 V3 S Solenoid valve Thermostatic expansion valve Electronic valve Evaporator Compressor EV_1 EV_2 Condenser T Solenoid valve E Non-return valve V2 Heat exchanger (reheating) Electronic valves connected in complementary mode Temperature probe Evaporator Thermostatic expansion valve Transcritical CO2 gas cooler This solution for the use of CO2 in refrigerating systems with a transcritical cycle involves using a gas cooler, that is a refrigerant/air heat exchanger resistant to high pressures, in place of the condenser. In transcritical operating conditions, for a certain gas cooler outlet temperature, there is pressure that optimises the efficiency of the system: For the wiring, see paragraph 2.11 “General connection diagram”. This involves PID control without any protectors (LowSH, LOP, MOP, High Tcond, see the chapter on Protectors), without any valve unblock procedure and without auxiliary control. Control is performed on the hot gas bypass temperature probe value read by input S2, compared to the set point: “Hot gas bypass temperature set point”. Control is reverse, as the temperature increases, the valve closes. Parameter/description CONTROL Hot gas bypass temperature set point Def. Min. Max. UOM 10 15 150 5 200 (392) 800 1000 800 °C (°F) PID: proportional gain PID integration time PID derivative time -60 (-76) 0 0 0 Set= pressure set point in a gas cooler with transcritical CO2 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. s s Tab. 5.o S2 EV S1 EVD evolution Another application that exploits this control function uses the connection of two EXV valves together to simulate the effect of a three-way valve, called “reheating”. To control humidity, valve EV_1 is opened to let the refrigerant flow into exchanger S. At the same time, the air that flows through evaporator E is cooled and the excess humidity removed, yet the temperature is below the set room temperature. It then flows through exchanger S, which heats it back to the set point (reheating). P T GC CP IHE M T V1 V2 E Fig. 5.i Key: CP GC E V1 Compressor Gas cooler Evaporator Solenoid valve V2 Thermostatic expasnion valve EV Electronic valve IHE Inside heat exchanger For the wiring, see paragraph 2.11 “General connection diagram”. 23 “EVD evolution” +0300005EN - rel. 3.0 - 18.06.2010 ENG This involves PID control without any protectors (LowSH, LOP, MOP, High Tcond, see the chapter on Protectors), without any valve unblock procedure and without auxiliary control. Control is performed on the gas cooler pressure probe value read by input S1, with a set point depending on the gas cooler temperature read by input S2; consequently there is not a set point parameter, but rather a formula: “CO2 gas cooler pressure set point”= Coefficient A * Tgas cooler (S2) + Coefficient B. The set point calculated will be a variable that is visible in display mode. Control is direct, as the pressure increases, the valve opens. EV T EVD evolution regulator S2 P 0-10 Vdc A Parameter/description ADVANCED CO2 regul. ‘A’ coefficient CO2 regul. ‘B’ coefficient CONTROL PID proport. gain PID integration time PID derivative time Def. Min. Max. UOM 3.3 -22.7 -100 -100 800 800 - 15 150 5 0 0 0 800 1000 800 100% 0% 0 10 Vdc Fig. 5.k s s Tab. 5.p Key: EV Electronic valve A Valve opening For the wiring, see paragraph 2.11 “General connection diagram”. Analogue positioner (4 to 20 mA) The valve will be positioned linearly depending on the value of the “4 to 20 mA input for analogue valve positioning” read by input S1. There is no PID control nor any protection (LowSH, LOP, MOP, High Tcond, see the chapter on Protectors), no valve unblock procedure and no auxiliary control. Important: the pre-positioning and repositioning procedures are not performed. Manual positioning can be enabled when control is active or in standby. I/O expander for pCO EV The EVD Evolution driver is connected to the pCO programmable controller via LAN, transferring the probe readings quickly and without filtering. The driver operates as a simple actuator, and receives the information needed to manage the valves from the pCO. T EVD evolution regulator S1 P 4-20 mA Parameter/Description CONFIGURATION Main control … I/O expander for pCO A 100% Def. multiplexed showcase/cold room Tab. 5.q 0% 4 20 mA Fig. 5.j Key: Electronic valve A Valve opening EV EVD evolution S1 S2 S3 S4 For the wiring, see paragraph 2.11 “General connection diagram”. Forced closing will only occur when digital input DI1 opens, thus switching between control status and standby. The pre-positioning and repositioning procedures are not performed. Manual positioning can be enabled when control is active or in standby. GND Tx/Rx T Analogue positioner (0 to 10 Vdc) P The valve will be positioned linearly depending on the value of the “0 to 10 V input for analogue valve positioning” read by input S1. There is no PID control nor any protection (LowSH, LOP, MOP, High Tcond), no valve unblock procedure and no auxiliary control, with corresponding forced closing of the valve and changeover to standby status. T GND EV pCO P shield Fig. 5.l Key: T EV “EVD evolution” +0300005EN - rel. 3.0 - 18.06.2010 24 Temperature probe Electronic valve P Pressure probe ENG 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. 5.8 Auxiliary control Auxiliary control can be activated at the same time as main control, and uses the probes connected to inputs S3 and/or S4. Parameter/description Def. CONFIGURATION Auxiliary control: Disabled 1=Disabled; 2=High condensing temperature protection on S3 probe; 3=Modulating thermostat on S4 probe; 4=Backup probes on S3 & S4 Tab. 5.r For the high condensing temperature protection (only available with superheat control), an additional pressure probe is connected to S3 that measures the condensing pressure. For the modulating thermostat function (only available with superheat control), an additional temperature probe is connected to S4 that measures the temperature on used to perform temperature control (see the corresponding paragraph). The last option (available if “main control” = 1 to 18) requires the installation of both probes S3 & S4, the first pressure and the second temperature. Parameter/description ADVANCED Modul. thermost setpoint Def. Min. Max. UOM 0 0.1 Modul. thermost SHset offset (0= function disabled) 0 200 (392) 100 (180) 100 (180) °C (°F) Modul. thermost differential -60 (-76) 0.1 (0.2) 0 (0) °C (°F) K (°R) Tab. 5.s The first two should have values similar to those set on the controller for the cabinet or utility whose temperature is being modulated. The offset, on the other hand, defines the intensity in closing the valve as the temperature decreases: the greater the offset, the more the valve will be modulated. The function is only active in a temperature band between the set point and the set point plus the differential. Note: if only one backup probe is fitted, under the manufacture parameters, the probe thresholds and alarm management can be set separately. 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. HITCond protection (high condensing temperature) The functional diagram is shown below. Examples of operation: C S4 set point + diff set point L P EVD evolution disabled) CP S1 S2 S3 F t 3. offset too low (or function SV ON OFF t S S4 M set point + diff E V EEV set point P t T 4. offset too high ON SV OFF Fig. 5.m Key: CP C L F S Compressor Condenser Liquid receiver Dewatering filter Liquid indicator EEV V E P T Electronic expansion valve Solenoid valve Evaporator Pressure probe (transducer) Temperature probe t S4 set point + diff set point t 5. offset correct For the wiring, see paragraph 2.11 “General connection diagram”. As already mentioned, the HITCond protection can only be enabled if the controller measures the condensing pressure/temperature, and responds moderately by closing the valve in the event where the condensing temperature reaches excessive values, to prevent the compressor from shutting down due to high pressure. The condensing pressure probe must be connected to input S3. ON SV OFF t Fig. 5.n Key: diff= differential SV= solenoid valve (showcase temperature control) S4= temperature Modulating thermostat This function is used, by connecting a temperature probe to input S4, to modulate the opening of the electronic valve so as to limit the lowering of the temperature read and consequently reach the control set point. This is useful in applications such as the multiplexed cabinets to avoid the typical swings in air temperature due to the ON/OFF control (thermostatic) of the solenoid valve. A temperature probe must be connected to input S4, located in a similar position to the one used for the traditional temperature control of the cabinet. In practice, the close the controlled temperature gets to the set point, the more the control 25 “EVD evolution” +0300005EN - rel. 3.0 - 18.06.2010 ENG C L EVD evolution CP S4 S1 S2 F S M E T EEV V P T Fig. 5.o Key: CP C L F S Compressor Condenser Liquid receiver Dewatering filter Liquid indicator EEV V E P T Electronic expansion valve Solenoid valve Evaporator Pressure probe (transducer) Temperature probe For the wiring, see paragraph 2.11 “General connection diagram”. Backup probes on S3 & S4 Important: this type of control is compatible with the “main control” parameter setting between 1 and 18. In this case, pressure probe S3 and temperature probe S4 will be used to replace probes S1 and S2 respectively in the event of faults on one or both, so as to guarantee a high level of reliability of the controlled unit. C L EVD evolution CP S1 S2 S3 S4 F S M E V EEV P T P T Fig. 5.p Key: CP C L F S Compressor Condenser Liquid receiver Dewatering filter Liquid indicator EEV V E P T Electronic expansion valve Solenoid valve Evaporator Pressure probe (transducer) Temperature probe For the wiring, see paragraph 2.11 “General connection diagram”. “EVD evolution” +0300005EN - rel. 3.0 - 18.06.2010 26 ENG 6. FUNCTIONS 6.1 Power supply mode Parameter/description CONFIGURATION Probe S2: CAREL NTC; CAREL NTC-HT high T; NTC built-in SPKP**T0; 0-10 V external signal Probe S4: CAREL NTC; CAREL NTC-HT high T; NTC built-in SPKP**T0 EVD evolution can be powered at 24 Vac or 24 Vdc. In the event of direct current power supply, after completing the commissioning procedure, to start control set “Power supply mode” parameter=1. Parameter/Description ADVANCED Power supply mode 0=24 Vac 1= 24 Vdc Def. Min. Max. UOM 0 0 1 - Important: probes S3 and S4 appear as NOT USED if the “auxiliary control” parameter is set as “disabled”. If “auxiliary control” has any other setting, the manufacturer setting for the probe used will be shown, which can be selected according to the type. 6.2 Network connection To connect an RS485/Modbus® controller to the network, as well as the network address parameter (see paragraph 4.2), the communication speed also needs to be set, in bit/s, using the “Network settings” parameter. Parameter/Description Def. Min. Max. UoM 0 2 Auxiliary control High condensing temperature protection Modulating thermostat Backup probes bit/s 0=4800 1=9600 2=19200 Tab. 6.b Parameter/description Configuration Probe S3: Ratiometric (OUT=0 to 5 V) 1= -1 to 4.2 barg 2= 0.4 to 9.3 barg 3= -1 to 9.3 barg 4= 0 to 17.3 barg 5= 0.85 to 34.2 barg 6= 0 to 34.5 barg 7= 0 to 45 barg Note: the following Modbus® serial communication parameters cannot be set: • byte size: 8 bits; • stop bits: 2; • parity: none; • transmission mode: RTU. 6.3 Inputs and outputs Analogue inputs The parameters in question concern the choice of the type of pressure probe S1 and S3 and the choice of the temperature probe S2 and S4, as well as the possibility to calibrate the pressure and temperature signals. As regards the choice of pressure probe S1, see the chapter on “Commissioning”. CAREL code NTC0**HP00 NTC0**WF00 NTC0**HF00 CAREL NTC-HT HT (50KΩ at 25°C) NTC0**HT00 NTC built-in SPKP**T0 Variable displayed S3 S4 S3,S4 Tab. 6.e Def. Ratiom.: -1 to Electronic (OUT=4 to 20 mA) 9.3 barg 8= -0.5 to 7 barg 9= 0 to 10 barg 10= 0 to 18,2 barg 11= 0 to 25 barg 12= 0 to 30 barg 13= 0 to 44.8 barg 14= remote, -0.5 to 7 barg 15= remote, 0 to 10 barg 16= remote, 0 to 18,2 barg 17= remote, 0 to 25 barg 18= remote, 0 to 30 barg 19= remote, 0 to 44.8 barg 20= 4-20 mA external signal ( cannot be selected) 21= -1 to 12.8 barg 22= 0 to 20.7 barg 23= 1.86 to 43.0 barg 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 NTC (10KΩ at 25°C) CAREL NTC Input S3 The auxiliary probe S3 is associated with the high condensing temperature protection or can be used as a backup probe for the main probe S1. If the probe being used is not included in the list, select any 0 to 5 V ratiometric or electronic 4 to 20 mA probe and then manually modify the minimum and maximum measurement in the manufacturer parameters corresponding to the probes. Important: with direct current power supply, in the event of power failures emergency closing of the valve is not performed, even if the EVBAT00400 battery module is connected. 2 CAREL NTC Tab. 6.d Tab. 6.a ADVANCED NETWORK SETTINGS Def. Tab. 6.f Calibrating pressure probes S1, S3 and temperature probes S2 and S4 (offset and gain parameters) In case it is necessary to make a calibration: • of the pressure probe, S1 and/or S3 it is possible to use the offeset parameter, which represents a constant that is added to the signal across the entire range of measurement, and can be expressed in barg/psig. If the 4 to 20 mA signal coming from an external controller on input S1 needs to be calibrated, both the offset and the gain parameters can be used, the latter which 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. Range -50T105°C 0T120°C (150 °C per 3000 h) -40T120°C Tab. 6.c Important: in case of NTC built-in probe, select also the parameter relevant to the corresponding ratiometric pressure probe. 27 “EVD evolution” +0300005EN - rel. 3.0 - 18.06.2010 ENG • Regulation security: if there is a network connection, before control is activated the driver must receive the control activation signal and the selected digital input must be closed. If the digital input is open, the driver always remains in standby. B B A Priority of digital inputs In certain cases the setting of digital inputs 1 and 2 may be the same or alternatively may be incompatible (e.g.: digital input 1 = regulation backup, digital input 2 = regulation security). The problem thus arises to determine which function the driver needs to perform. A mA 4 Vdc 20 0 10 Fig. 6.a Consequently, each type of function is assigned a priority, primary (PRIM) or secondary (SEC), as shown in the table: Key: A= offset, B= gain Parameter/description PROBES S1 calibration offset Def. Min. Max. UOM 0 S1 calibration gain on 4-20 mA S2 calibration offset 1 0 barg (psig), mA °C (°F), volt S2 calibration gain, 0 to 10 V S3 calibration offset S4 calibration offset 1 0 0 60 (870), 60 20 20 (290), 20 20 60 (870) 20 (36) -60 (-870), -60 -20 -20 (-290), -20 -20 -60 (-870) -20 (-36) DI1/DI2 configuration 1=Disabled 2=Valve regulation optimization after defrost 3=Discharged battery alarm management 4=Valve forced open (at 100%) 5=Regulation start/stop 6=Regulation backup 7=Regulation security There are four possible cases of digital input configurations with primary or secondary functions. barg (psig) °C (°F) Tab. 6.g Function set DI1 PRIM PRIM SEC SEC Digital inputs The functions of digital inputs 1 and 2 can be set by parameter, as shown in the table below: Parameter/description Def. Min. Max. UOM CONFIGURATION DI1 configuration 5/6 1 1= Disabled 2= Valve regulation optimization after defrost 3= Disch. battery alarm management 4= Valve forced open (at 100%) 5= Regulation start/stop 6= Regulation backup 7= Regulation security CONTROL Start delay after defrost 10 0 7 DI2 PRIM SEC PRIM SEC Function performed by digital input PRIM SEC DI1 DI1 DI2 DI2 DI1 Regulation backup DI1 (supervisor variable) Note that: • if digital inputs 1 and 2 are set to perform a PRIM function, only the function set for input 1 is performed; • if the digital inputs 1 and 2 are set to perform a SEC function, only the SEC function set for input 1 is performed; the driver will be set to “Regulation backup” with the value of the digital input determined by the “Regulation backup from supervisor” variable. - Relay output 60 The relay output can be configured as: • alarm relay output. See the chapter on Alarms; • solenoid valve control; • electronic expansion valve status signal relay. The relay contact is only open if the valve is closed (opening=0%). As soon as control starts (opening >0%, with hysteresis), the relay contact is closed Parameter/description Def. min Tab. 6.h Valve regulation optimization after defrost: the selected digital input tells the driver the current defrost status. Defrost active = contact closed. Access Manufacturer programming mode to set the start delay after defrost. CONFIGURATION Relay configuration: Alarm 1= Disabled; 2= alarm relay (opened in case of alarm); 3= Sole- relay noid valve relay (open in standby); 4= valve + alarm relay (open in standby and control alarms) 5= Reversed alarm relay (closed in case of alarm); 6= Valve status relay (open if valve is closed) Tab. 6.i Discharged battery alarm management: if the selected digital input is connected to the battery charge module for EVD evolution, EVBAT00400, the controller signals discharged or faulty batteries, so as to generate an alarm message and warn the service technicians that maintenance is required. See the general connection diagram. 6.4 Control status Valve forced open: when the digital input closes, the valve opens completely (100%), unconditionally. When the contact opens again the valve closes and moves to the position defined by the parameter “valve opening at start-up” for the pre-position time. Control can then start. The electronic valve driver has 6 different types of control status, each of which may correspond to a specific phase in the operation of the refrigeration unit and a certain status of the driver-valve system. The status may be as follows: • forced closing: initialisation of the valve position when switching the instrument on; • standby: no temperature control, unit OFF; • wait: opening of the valve before starting control, also called prepositioning, when powering the unit and in the delay after defrosting; • control: effective control of the electronic valve, unit ON; • positioning: step-change in the valve position, corresponding to the start of control when the cooling capacity of the controlled unit varies (only for pLAN EVD connected to a pCO); Regulation start/stop: digital input closed: control active; digital input open: driver in standby (see the paragraph “Control status”); Important: this setting excludes activation/deactivation of control via the network. See the following functions. • Regulation backup: if there is a network connection and communication fails, the driver checks the status of the digital input to determine whether control is active or in standby; “EVD evolution” +0300005EN - rel. 3.0 - 18.06.2010 Type of function SEC SEC SEC SEC PRIM PRIM PRIM 28 ENG • stop: end of control with the closing of the valve, corresponds to the If the capacity request is 100%: Opening (%)= (Valve opening at start-up); end of temperature control of the refrigeration unit, unit OFF; • valve motor error recognition: see paragraph 9.5 • tuning in progress: see paragraph 5.3. 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%. Forced closing Forced closing is performed after the driver is powered-up and corresponds to a number of closing steps equal to the parameter “Closing steps”, based on the type valve selected. This is used to realign the valve to the physical position corresponding to completely closed. The driver and the valve are then ready for control and both aligned at 0 (zero). On power-up, first a forced closing is performed, and then the standby phase starts. Parametro/description Def. Min. Max. UOM VALVE EEV closing steps 500 0 9999 step Tab. 6.j Note: • this procedure is used to anticipate the movement and bring the valve significantly closer to the operating position in the phases immediately after the unit starts; • 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. The valve is closed in the event of power failures with 24 Vac power supply when the EVBAT00400 battery module is connected. In this case, the parameter “Forced valve closing not completed”, visible only on the supervisor, is forced to 1. If when restarting forced closing of the valve was not successful: 1. the Master programmable controller checks the value of the parameter and if this is equal to 1, decides the best strategy to implement based on the application; 2. the driver on restart positions the valve as explained in the paragraph “Pre-positioning/start control The parameter is reset to 0 (zero) by the Master controller (e.g. pCO), once the parameter has been set to 1 the driver returns it to 0 (zero) only if forced emergency closing is completed successfully. Wait When the calculated position has been reached, regardless of the time taken (this varies according to the type of valve and the objective position), there is a constant 5 second delay before the actual control phase starts. This is to create a reasonable interval between standby, in which the variables have no meaning, as there is no flow of refrigerant, and the effective control phase. Control The control request can be received by the closing of digital input 1 or via the network (pLAN). The solenoid or the compressor are activated when the valve, following the pre-positioning procedure, has reached the calculated position. The following figure represents the sequence of events for starting control of the refrigeration unit. Standby Standby corresponds to a situation of rest in which no signals are received to control the electronic valve. This normally occurs: • when the refrigeration unit stops operating, either when switched off manually (e.g. from the button, supervisor) or when reaching the control set point; • during defrosts, except for those performed by reversing of the cycle (or hot gas bypass). In general, it can be said that 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 CONTROL Valve open in standby 0=disabled=valve closed; 1=enabled = valve open 25% Def. Min. Max. UOM 0 0 1 - Control delay after defrost Some types of refrigerating cabinets have problems controlling the electronic valve in the operating phase after defrost. In this period (10 to 20 min after defrosting), the superheat measurement may be altered by the high temperature of the copper pipes and the air, causing excessive opening of the electronic valve for extended periods, in which there is return of liquid to the compressors that is not detected by the probes connected to the driver. In addition, the accumulation of refrigerant in the evaporator in this phase is difficult to dissipate in a short time, even after the probes have started to correctly measure the presence of liquid (superheat value low or null). The driver can receive information on the defrost phase in progress, via digital input 2. The “Start-up delay after defrost” parameter is used to set a delay when control resumes so as to overcome this problem. During this delay, the valve will remain in the pre-positioning point, while all the normal probe alarms procedures, etc. managed. Tab. 6.k Parameter/description CONTROL Start-up delay after defrost Pre-positioning/start control If during standby a control request is received, before starting control the valve is moved to a precise initial position. IThe pre-position time is the time the valve is held in a steady position based on the parameter “Valve opening at start-up”. Parameter/description Def. CONTROL Pre-position time 6 Valve opening at start-up (evaporator/valve 50 capacity ratio) Min. Max. 0 0 18000 s 100 % Def. Min. Max. UOM 10 0 60 min Tab. 6.m Important: if the superheat temperature should fall below the set point, control resumes even if the delay has not yet elapsed. UOM Tab. 6.l The valve opening parameter should be set based on the ratio between the rated cooling capacity of the evaporator and the valve (e.g. rated evaporator cooling capacity: 3kW, rated valve cooling capacity: 10kW, valve opening = 3/10 = 33%). 29 “EVD evolution” +0300005EN - rel. 3.0 - 18.06.2010 ENG A ON A OFF OFF S t ON S t ON ST t ON OFF OFF R t ON OFF OFF P ON t ON R t ON OFF OFF T1 W t T2 t T4 Fig. 6.d Fig. 6.b Key: Key: A S P R Control request Standby Pre-positioning Control W T1 T2 t A S ST Wait Pre-positioning time Start-up delay after defrost Time Positioning (change cooling capacity) This control 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 control phase starts. Control request Standby Stop R T4 t Control Stop position time Time 6.5 Advanced control status As well as normal control status, the driver can have 3 special types of status related to specific functions: • manual positioning: this is used to interrupt control so as to move the valve, setting the desired position; • recover physical valve position: recover physical valve steps when fully opened or closed; • unblock valve: forced valve movement if the driver considers it to be blocked. Note: if information is not available on the variation in unit cooling capacity, this will always be considered as operating at 100% and therefore the procedure will never be used. In this case, the PID control must be more reactive (see the chapter on Control) so as to react promptly to variations in load that are not communicated to the driver. A Manual positioning Manual positioning can be activated at any time during the standby or control phase. Manual positioning, once enabled, is used to freely set the position of the valve using the corresponding parameter. ON Parameter/description CONTROL Enable manual valve position Manual valve position OFF C t ON Def. Min. Max. UOM 0 0 0 0 1 9999 step Tab. 6.n OFF NP Control is placed on hold, all the system and control alarms are enabled, however neither control nor the protectors can be activated. Manual positioning thus has priority over any status/protection of the driver t ON OFF R Note: • the manual positioning status is NOT saved when restarting after a t ON power failure. • in for any reason the valve needs to be kept stationary after a power OFF T3 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. t W Fig. 6.c Key: A C NP R Control request Change capacity Repositioning Control T3 W t Repositioning time Wait Time Stop/end control The stop procedure involves closing the valve from the current position until reaching 0 steps, plus a further number of steps so as to guarantee complete closing. Following the stop phase, the valve returns to standby. “EVD evolution” +0300005EN - rel. 3.0 - 18.06.2010 30 ENG Recover physical valve position Parameter/description VALVE EEV opening synchroniz. EEV closing synchroniz. Def. Min. Max. UOM 1 1 0 0 1 1 Tab. 6.o This procedure is necessary as the stepper motor intrinsically tends to lose steps during movement. Given that the control phase may last continuously for several hours, it is probable that from a certain time on the estimated position sent by the valve driver does not correspond exactly to the physical position of the movable element. This means that when the driver reaches the estimated fully closed or fully open position, the valve may physically not be in that position. The “Synchronisation” procedure allows the driver to perform a certain number of steps in the suitable direction to realign the valve when fully opened or closed. Note: • realignment is in intrinsic part of the forced closing procedure and is activated whenever the driver is stopped/started and in the standby phase; • the possibility to enable or disable the synchronisation procedure depends on the mechanics of the valve. When the setting the “valve” parameter, the two synchronisation parameters are automatically defined. The default values should not be changed. Unblock valve This procedure is only valid when the driver is performing superheat control. Unblock valve is an automatic safety procedure that attempts to unblock a valve that is supposedly blocked based on the control variables (superheat, valve position). The unblock procedure may or may not succeed depending on the extent of the mechanical problem with the valve. If for 10 minutes the conditions are such as to assume the valve is blocked, the procedure is run a maximum of 5 times. The symptoms of a blocked valve 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); • electrical damage to the solenoid valve upstream of the electronic valve; • blockage of the filter upstream of the electronic valve (if installed); • electrical problems with the electronic valve motor; • electrical problems in the driver-valve connection cables; • incorrect driver-valve electrical connection; • electronic problems with the valve control driver; • secondary fluid evaporator fan/pump malfunction; • insufficient refrigerant in the refrigerant circuit; • refrigerant leaks; • lack of subcooling in the condenser; • electrical/mechanical problems with the compressor; • processing residues or moisture in the refrigerant circuit. Note: the valve unblock procedure is nonetheless performed in each of these cases, given that it does not cause mechanical or control problems. Therefore, also check these possible causes before replacing the valve. 31 “EVD evolution” +0300005EN - rel. 3.0 - 18.06.2010 ENG 7. PROTECTORS These are additional functions that are activated in specific situations that are potentially dangerous for the unit being controlled. They feature an integral action, that is, the action increases gradually when moving away from the activation threshold. They may add to or overlap (disabling) normal PID superheat control. By separating the management of these functions from PID control, the parameters can be set separately, allowing, for example, normal control that is less reactive yet much faster in responding when exceeding the activation limits of one of the protectors. When the superheat value falls below the threshold, the system enters low superheat status, and the intensity with which the valve is closed is increased: the more the superheat falls below the threshold, the more intensely the valve will close. The LowSH threshold, must be less than or equal to the superheat set point. The low superheat integration time indicates the intensity of the action: the lower the value, the more intense the action. The integration time is set automatically based on the type of main control. SH 7.1 Protectors Low_SH_TH The protectors are 4: • LowSH, low superheat; • LOP, low evaporation temperature; • MOP, high evaporation temperature; • High Tcond, high condensing temperature. Low_SH t ON OFF Note: The HITCond protection requires an additional probe (S3) to those normally used, either installed on the driver, or connected via tLAN or pLAN to a controller. A t ON OFF The protectors have the following main features: D controlled unit, this is set in Service programming mode; Fig. 7.a • integration time, which determines the intensity (if set to 0, the Key: protector is disabled): set automatically based on the type of main control; • alarm, with activation threshold (the same as the protector) and timeout (if set to 0 disables the alarm signal). SH Low_SH_TH Low_SH B Note: The alarm signal is independent from the effectiveness of the protector, and only signals that the corresponding threshold has been exceeded. If a protector is disabled (null integration time), the relative alarm signal is also disabled. LOP (low evaporation pressure) Characteristics of the protectors Reaction Intense closing Intense opening Moderate closing Moderate closing Reset Immediate Immediate Controlled Controlled Tab. 7.a Reaction: summary description of the type of action in controlling the valve. Reset: summary description of the type of reset following the activation of the protector. Reset is controlled to avoid swings around the activation threshold or immediate reactivation of the protector. CONTROL LOP protection threshold LowSH protection integration time ALARM CONFIGURATION Low superheat alarm timeout (LowSH) (0= alarm DISABLED) 15 300 -40 (-72) set point superheat 0 800 0 18000 Alarm Alarm timeout Time -60 (-72) Protection MOP: °C (°F) threshold 0 800 s 0 18000 s The integration time is set automatically based on the type of main control. K (°F) Note: s • the LOP threshold must be lower then the rated evaporation s temperature of the unit, otherwise it would be activated unnecessarily, and greater than the calibration of the low pressure switch, otherwise it would be useless. As an initial approximation it can be set to a value exactly half-way between the two limits indicated; Tab. 7.b “EVD evolution” +0300005EN - rel. 3.0 - 18.06.2010 A D t Tab. 7.c 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 5 -50 LOP protection integration time 0 ALARM CONFIGURATION Low evaporation temperature 300 alarm timeout (LOP) (0= alarm DISABLED) LowSH (low superheat) CONTROL LowSH protection threshold Superheat Low_SH protection threshold Low_SH protection Automatic alarm reset 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 integration time indicates the intensity of the action: the lower the value, the more intense the action. Parameter/description Def. Min. Max. UOM Each protector is affected by the proportional gain parameter (K) for the PID superheat control. The higher the value of K, the more intense the reaction of the protector will be. Protection LowSH LOP MOP High Tcond t B • activation threshold: depending on the operating conditions of the 32 ENG • the protector has no purpose in multiplexed systems (showcases) As the action is integral, it depends directly on the difference between the evaporation temperature and the activation threshold. The more the evaporation temperature increases with reference to the MOP threshold, the more intensely the valve will close. The integration time indicates the intensity of the action: the lower the value, the more intense the action. where the evaporation is kept constant and the status of the individual electronic valve does not affect the pressure value; • the LOP alarm can be used as an alarm to highlight refrigerant leaks by the circuit. A refrigerant leak in fact causes an abnormal lowering of the evaporation temperature that is proportional, in terms of speed and extent, to the amount of refrigerant dispersed. T_EVAP MOP_TH T_EVAP MOP_TH - 1 LOP_TH MOP LOP OFF t ON OFF PID ALARM OFF ALARM D LOP B Evaporation temperature Low evaporation temperature protection threshold LOP protection Automatic alarm reset Fig. 7.c D Alarm timeout ALARM Alarm t Key: T_EVAP PID MOP D Time MOP (high evaporation pressure) The MOP protection threshold is applied as a saturated evaporation temperature value so that it can be easily compared against the technical specifications supplied by the manufacturers of the compressors. The protector is activated so as to prevent too high evaporation temperatures from causing an excessive workload for the compressor, with consequent overheating of the motor and possible activation of the thermal protector. The protector is very useful in self-contained units if starting with a high refrigerant charge or when there are sudden variations in the load. The protector is also useful in multiplexed systems (showcases), as allows all the utilities to be enabled at the same time without causing problems of high pressure for the compressors. To reduce the evaporation temperature, the output of the refrigeration unit needs to be decreased. This can be done by controlled closing of the electronic valve, implying superheat is no longer controlled, and an increase in the superheat temperature. The protector will thus have a moderate reaction that tends to limit the increase in the evaporation temperature, keeping it below the activation threshold while trying to stop the superheat from increasing as much as possible. Normal operating conditions will not resume based on the activation of the protector, but rather on the reduction in the refrigerant charge that caused the increase in temperature. The system will therefore remain in the best operating conditions (a little below the threshold) until the load conditions change. Def. Min. Max. UOM 50 Protection LOP: threshold 0 200 (392) 800 °C (°F) 0 18000 s MOP protection integration time 20 ALARM CONFIGURATION High evaporation temperature 600 alarm timeout (MOP) (0= alarm DISABLED) Evaporation temperature PID superheat control MOP protection Alarm timeout MOP_TH MOP threshold ALARM Alarm t Time Important: the MOP threshold must be greater than the rated evaporation temperature of the unit, otherwise it would be activated unnecessarily. The MOP threshold is often supplied by the manufacturer of the compressor. It is usually between 10 °C and 15 °C. MOP= Maximum Operating Pressure. Parameter/description CONTROL MOP protection threshold t D Fig. 7.b Key: T_EVAP LOP_TH t ON OFF t B t ON OFF t ON t ON If the closing of the valve also causes an excessive increase in the suction temperature (S2) above the set threshold – only set via supervisor (PlantVisor, pCO, VPM), not on the display - the valve will be stopped to prevent overheating the compressor windings, awaiting a reduction in the refrigerant charge. If the MOP protection function is disabled by setting the integral time to zero, the maximum suction temperature control is also deactivated. Parameter/description CONTROL MOP protection: suction temperature threshold Def. Min. 30 Max. UOM -60 (-72) 200 (392) °C(°F) Tab. 7.e At the end of the MOP protection function, superheat regulation restarts in a controlled manner to prevent the evaporation temperature from exceeding the threshold again. High Tcond (high condensing temperature) To activate the high condensing temperature protector (High Tcond), a pressure probe must be connected to input S3. The protector is activated so as to prevent too high evaporation temperatures from stopping the compressor due to the activation of the high pressure switch. s Parameter/description ADVANCED High Tcond threshold Tab. 7.d High Tcond integration time ALARM CONFIGURATION High condensing temperature alarm timeout (High Tcond) (0= alarm DISABLED) The integration time is set automatically based on the type of main control. When the evaporation temperature rises above the MOP threshold, the system enters MOP status, superheat control is interrupted to allow the pressure to be controlled, and the valve closes slowly, trying to limit the evaporation temperature. Def. Min. Max. UOM 80 200 (392) 800 °C (°F) 20 -60 (-76) 0 600 0 18000 s s Tab. 7.f 33 “EVD evolution” +0300005EN - rel. 3.0 - 18.06.2010 ENG The integration time is set automatically based on the type of main control. Note: • the protector is very useful in units with compressors on board if the air-cooled condenser is undersized or dirty/malfunctioning in the more critical operating conditions (high outside temperature); • the protector has no purpose in multiplexed systems (showcases), where the condensing pressure is maintained constant and the status of the individual electronic valves does not affect the pressure value. To reduce the condensing temperature, the output of the refrigeration unit needs to be decreased. This can be done by controlled closing of the electronic valve, implying superheat is no longer controlled, and an increase in the superheat temperature. The protector will thus have a moderate reaction that tends to limit the increase in the condensing temperature, keeping it below the activation threshold while trying to stop the superheat from increasing as much as possible. Normal operating conditions will not resume based on the activation of the protector, but rather on the reduction in the outside temperature. The system will therefore remain in the best operating conditions (a little below the threshold) until the environmental conditions change. T_COND T_COND_TH T_COND_TH - Δ HiTcond t ON OFF PID t ON OFF ALARM t ON OFF t D Fig. 7.d Key: T_COND Condensing temperature High Tcond PID D High Tcond protection status PID superheat control Alarm timeout T_COND_ TH ALARM High Tcond threshold Alarm t Time Note: • the High Tcond threshold must be greater than the rated condensing temperature of the unit and lower then the calibration of the high pressure switch; • the closing of the valve will be limited if this causes an excessive decrease in the evaporation temperature. “EVD evolution” +0300005EN - rel. 3.0 - 18.06.2010 34 ENG A Max. UOM Modbus® A Min. CAREL SVP A A Def. Type ** user* 8. PARAMETERS TABLE 198 R404A 1 - 207 - - I I 11 13 138 140 CAREL EXV - - - I 14 141 Ratiometric: -1 to 9.3 barg - - I 16 143 Main control: Multiplexed 1= Centralized cabinet/cold room cabinet/cold 2= Self contained cabinet/cold room room 3= Perturbated cabinet/control room 4= Subcritical CO2 cabinet/cold room 5= R404A condenser for subcritical CO2 6= AC or chiller with plate evaporator 7= AC or chiller with shell tube evaporator 8= AC or chiller with battery coil evaporator 9= AC or chiller with variable cooling capacity 10= AC or chiller perturbated unit 11= EPR Back pressure 12= Hot gas by-pass by pressure 13= Hot gas by-pass by temperature 14= transcritical CO2 gas cooler 15= analog positioner (4 to 20 mA) 16= analog positioner (0 to10 V) 17= AC/chiller or cabinet/cold room with adaptative regulation 18= AC or chiller with Digital Scroll compressor (*) 19= AC/chiller with SIAM ANB compressor (*) 20= superheat regulation with 2 temperature probes 21= I/O expander for pCO (*)= only for controls for CAREL valves - - I 15 142 Parameter/description CONFIGURATION Network address Refrigerant: 1= R22 2= R134a 3= R404A 5= R410A 6= R507A 7= R290 9= R600a 10= R717 11= R744 13= R1270 14= R417A 15= R422D 17= R422A 18= R423A 19= R407A Valve: 1= CAREL EXV 2= Alco EX4 3= Alco EX5 4= Alco EX6 5= Alco EX7 6= Alco EX8 330Hz consigliata CAREL 7= Alco EX8 500Hz specifica Alco 8= Sporlan SEI 0.5-11 9= Sporlan SER 1.5-20 10= Sporlan SEI 30 11= Sporlan SEI 50 12= Sporlan SEH 100 13= Sporlan SEH 175 14= Danfoss ETS 12.5-25B 15= Danfoss ETS 50B 16= Danfoss ETS 100B 17= Danfoss ETS 250 18= Danfoss ETS 400 19= Two CAREL EXV connected together 20= Sporlan SER(I)G,J,K 21= -1 to 12.8 barg 22= 0 to 20.7 barg 23= 1.86 to 43.0 barg Probe S1: Ratiometric (OUT=0 to 5 V) 1= -1…4,2 barg 2= -0,4…9,3 barg 3= -1…9,3 barg 4= 0…17,3 barg 5= 0,85…34,2 barg 6= 0…34,5 barg 7= 0…45 barg A Notes 4= R407C 8= R600 12= R728 16= R413A 20= R427A Electronic (OUT=4 to 20 mA) 8= -0,5…7 barg 9= 0…10 barg 10= 0…18,2 bar 11= 0…25 barg 12= 0…30 barg 13= 0…44,8 barg 14= remote, -0,5…7 barg 15= remote, 0…10 barg 16= remote, 0…18,2 barg 17= remote, 0…25 barg 18= remote, 0…30 barg 19= remote, 0…44,8 barg 20= 4…20 mA external signal 35 “EVD evolution” +0300005EN - rel. 3.0 - 18.06.2010 A Min. Max. UOM Modbus® A Def. CAREL SVP A Parameter/description Type ** user* ENG Probe S2: 1= CAREL NTC 2= CAREL NTC-HT high 3= combined NTC SPKP**T0 4= 0 to 10V external signal Auxiliary control: 1= Disabled 2= high condensing temperature protection on S3 probe 3= modulating thermostat on S4 probe 4= backup probes on S3 and S4 Probe S3 CAREL NTC - - - I 17 144 Disabled - - - I 18 145 Ratiometric: -1 to 9.3 barg - - I 19 146 Alarm relay - - - I 12 139 CAREL NTC - - - I 20 147 Regulation start/stop (tLAN-RS485) / Regulation backup (pLAN) - - I 10 137 Superheat - - I 45 172 Ratiometric (OUT=0 to 5 V) 1= -1…4,2 barg 2= -0,4…9,3 barg 3= -1…9,3 barg 4= 0…17,3 barg 5= 0,85…34,2 barg 6= 0…34,5 barg 7= 0…45 barg A A A C Electronic (OUT=4 to 20 mA) 8= -0.5…7 barg 9= 0…10 barg 10= 0…18,2 bar 11= 0…25 barg 12= 0…30 barg 13= 0…44,8 barg 14= remoto, -0,5…7 barg 15= remoto, 0…10 barg 16= remoto, 0…18,2 barg 17= remoto, 0…25 barg 18= remoto, 0…30 barg 19= remoto, 0…44,8 barg 20= segnale esterno (4…20 mA) (cannot be selected) 21= -1 to 12.8 barg 22= 0 to 20.7 barg 23= 1.86 to 43.0 barg Relay configuration: 1= Disabled 2= alarm relay (opened in case of alarm) 3= Solenoid valve relay (open in standby) 4= valve + alarm relay (opened in stand-by and control alarms) 5= Reversed alarm relay (closed in case of alarm) 6= Valve status relay (open if valve closed) Probe S4: 1= CAREL NTC 2= CAREL NTC-HT high temperature 3= NTC built-in SPKP**T0 DI2 configuration: 1= Disabled 2= valve regulation optimization after defrost 3= Battery alarm management 4= Valve forced open (at 100%) 5= Regulation start/stop 6= Regulation backup 7= Regulation security Display main var. 1: 1= Valve opening 2= Valve position 3= Current cool. capacity 4= Control set point 5= Superheat 6= Suction temperature 7= Evaporation temperature 8= Evaporation pressure 9= Condensing temperature 10= Condensing pressure 11= Modulating thermostat temperature 12= EPR pressure 13= Hot gas bypass pressure 14= Hot gas bypass temperature 15= CO2 gas cooler outlet temperature 16= CO2 gas cooler outlet pressure 17= CO2 gas cooler pressure set point 18= S1 probe measurement 19= S2 probe measurement 20= S3 probe measurement 21= S4 probe measurement 22= 4-20 mA input value 23= 0-10 V input value “EVD evolution” +0300005EN - rel. 3.0 - 18.06.2010 - 36 Notes Max. UOM Type ** CAREL SVP Modbus® ENG - - I 46 173 - - I 24 151 Valve at fixed position - - I 25 152 No action - - - I 26 153 No action - - - I 27 154 °C(K), barg Regulation start/stop (tLAN-RS485) / Regulation backup (pLAN) - - I 21 148 Italiano - - - 0 -60 (-870), -60 60 (870), 60 A 34 33 S1 calibrat gain on 4-20 mA S1 pressure MINIMUM value 1 -1 -20 -20 (-290) barg (psig) mA barg (psig) A A 36 32 35 31 C S1 pressure MAXIMUM value 9.3 barg (psig) A 30 29 C S1 alarm MIN pressure -1 S1 pressure MINIMUM value -20 (-290) A 39 38 C S1 alarm MAX pressure 9.3 S1 alarm MAX barg (psig) pressure 200 (2900) barg (psig) A 37 36 C C S2 calibration offset S2 alarm MIN temperat 0 -50 A A 41 46 40 45 C S2 alarm MAX temperat 105 20 (36), 20 °C (°F), volt S2 alarm MAX °C(°F) temp. 200 (392) °C(°F) A 44 43 C C C S3 calibrat offset S3 calibration gain on 4 to 20 mA (cannot be selected) S3 pressure MINIMUM value 0 1 -1 barg (psig) barg (psig) A A A 35 83 33 34 81 32 C S3 pressure MAXIMUM value 9.3 60 (870) 20 S3 pressure MAXIMUM value 200 (2900) barg (psig) A 31 30 C S3 alarm MIN pressure -1 A 40 39 C S3 probe alarm MAX pressure 9.3 S3 alarm MAX barg (psig) pressure 200 (2900) barg (psig) A 38 37 C C S4 calibrat. offset S4 alarm MIN temperat. 0 -50 A A 42 47 41 46 C S4 alarm MAX temperat. 105 S4 alarm MIN temp. 20 (36) °C (°F) S4 alarm MAX °C (°F) temp. 200 (392) °C (°F) A 45 44 A CONTROL Superheat set point 11 180 (324) K(°R) A 50 49 50 0 LowSH: threshold 0 0 100 1 % - I D 37 23 164 22 10 6 10 0 0 -60 (-76) 60 18000 200 (392) min s °C (°F) I I A 40 90 28 167 217 27 Def. C Display main var. 2 (See display main var. 1) C C S1 probe alarm manag.: 1= No action 2= Valve forced closed 3= Valve at fixed posit. 4= Use backup probe S3 S2 probe alarm manag.: 1= No action 2= Valve forced closed 3= Valve at fixed posit. 4= Use backup probe S4 S3 probe alarm manag.: 1= No action 2= Valve forced closed 3= Valve at fixed posit. S3 probe alarm manag.: 1= No action 2= Valve forced closed 3= Valve at fixed posit. Unit of measure: °C/K/barg; °F/psig DI1 configuration 1= Disabled 2= Valve regulation optimization after defrost 3= Discharged battery alarm management 4= Valve forced open (at 100%) 5= Regulation start/stop 6= Regulation backup 7= Regulation security Language: Italiano; English PROBES S1 calibration offset Valve opening Valve at fixed position C C user* Parameter/description C C C C A C A C C A A Valve opening at start-up Valve opened in standby (0=disabled=valve closed; 1=enabled = valve open 25%) start-up delay after defrost Pre-position time Hot gas bypass temperature set point Min. S1 alarm MIN pressure -20 (-36), -20 -60 S2 alarm MIN temp. -60 (-870) -20 -20 (-290) S3 pressure MINIMUM value -20 (-290) S3 alarm MIN pressure -20 (-36) -60 (-76) 37 20 S1 pressure MAXIMUM value 200 (2900) Notes “EVD evolution” +0300005EN - rel. 3.0 - 18.06.2010 Def. Min. Max. UOM CAREL SVP Modbus® A A C C C A Hot gas bypass pressure set point EPR pressure set point PID proportional gain PID integral time PID derivative time LowSH protection threshold 3 3.5 15 150 5 5 -20 (-290) -20 (-290) 0 0 0 -40 (-72) barg (psig) barg (psig) s s K(°F) A A A I A A 62 29 48 38 49 56 61 28 47 165 48 55 C A LowSH protection integral time LOP protection threshold 15 -50 0 -60 (-76) s °C (°F) A A 55 52 54 51 C A LOP protection integral time MOP protection threshold 0 50 s °C (°F) A A 51 54 50 53 20 0 0 35 105 0 LOP protection threshold 0 0 0 -40(-72) -60(-76) 200 (2900) 200 (2900) 800 1000 800 superheat set point 800 MOP protection threshold 800 200 (392) 800 1 9999 180 (324) 200 (392) s step K (F°) °C (°F) A D I A A 53 52 24 23 39 166 100 99 101 100 80 20 0 0, 1 0 3.3 -22.7 0 50 -60 (-76) 0 -60 (-76) 0.1 (0.2) 0 (0) -100 -100 0 0 200 (392) 800 200 (392) 100 (180) 100 (180) 800 800 1 255 °C (°F) s °C (°F) °C (°F) K (°F) - A A A A A A A D I 58 57 61 60 59 63 64 39 79 57 56 60 59 58 62 63 38 206 - 2 0 2 bit/s I 74 201 CO 0 0 1 - D 47 46 300 0 18000 s I 43 170 300 0 18000 s I 41 168 600 0 18000 s I 42 169 600 0 18000 s I 44 171 -50 300 -60 (-76) 0 200 (392) 18000 °C(°F) s A I 26 9 25 136 50 480 500 50 450 100 30 1 1 0 0 0 1 0 0 1 0 0 9999 9999 9999 2000 800 250 100 1 1 step step step step/s mA mA % - I I I I I I I D D 30 31 36 32 33 35 34 20 21 157 158 163 159 160 162 161 19 20 user* Parameter/description Type ** ENG C A A C C MOP protection integral time Enable manual valve position Manual valve position Discharge superheat setpoint Discharge temperature setpoint ADVANCED A High Tcond threshold C High Tcond integral time A Modul thermost setpoint A Modul thermost differential C Modul thermost SHset offset C CO2 regul. 'A' coefficient C CO2 regul. 'B' coefficient C Start manual tuning 0 = no; 1= yes C Tuning method 0…100= automatic selection 101…141= manual selection 142…254=not accepted 255= PID parameters identified model C Network settings 0= 4800; 1= 9600; 2= 19200 A Power supply mode 0= 24 Vac; 1= 24 Vdc ALARM CONFIGURATION C Low superheat alarm timeout (LowSH) (0= alarm DISABLED) C Low evap temp alarm timeout (LOP) (0= alarm DISABLED) C High evap temp alarm timeout (MOP) (0= alarm DISABLED) C High cond temp alarm timeout (High Tcond) (0= alarm DISABLED) C Low suction temperature alarm threshold C Low suct temp alarm timeout (0= alarm DISABLED) VALVE C EEV minimum steps C EEV maximum steps C EEV closing steps C EEV nominal step rate C EEV nominal current C EEV holding current C EEV duty cycle C EEV opening synchroniz. C EEV closing synchroniz. Notes Tab. 8.a * User: A= Service (installer), C= Manufacturer. **Type of variable: A= analogue, D= digital, I= integer “EVD evolution” +0300005EN - rel. 3.0 - 18.06.2010 38 ENG 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: • international system (°C, K, barg); • imperial system (°F, psig). Important: the drivers EVD evolution-pLAN (code EVD000E1* and EVD0000E4*), connected in pLAN to a pCO controller, do not manage the change of the unit of measure. Note: the unit of measure K relate to degrees Kelvin adopted for measuring the superheat and the related parameters. When changing the unit of measure, all the values of the parameters saved on the driver and all the measurements read by the probes will be recalculated. This means that when changing the units of measure, control remains unaltered. Example 1: The pressure read is 100 barg, this will be immediately converted to the corresponding value of 1450 psig. Example 2: The “superheat set point” parameter set to 10 K will be immediately converted to the corresponding value of 18 °F. Example 3: The “S4 alarm MAX temp.” parameter, set to 150 °C, will be immediately converted to the corresponding value of 302 °F Note: due to limits in the internal arithmetic of the driver, pressure values above 200 barg (2900 psig) and temperature values above 200 °C (392 °F) cannot be converted. 39 “EVD evolution” +0300005EN - rel. 3.0 - 18.06.2010 ENG ALARM ALARMS ALARMS 8.2 Variables accessible via serial connection Description Probe S1 reading Probe S2 reading Probe S3 reading Probe S4 reading Suction temperature Evaporation temperature Evaporation pressure Hot gas bypass temperature EPR pressure (back pressure) Superheat Condensing pressure Condensing temperature Modulating thermostat temperature Hot gas bypass pressure CO2 gas cooler outlet pressure CO2 gas cooler outlet temperature Valve opening CO2 gas cooler pressure set point 4-20 mA input value 0-10 V input value Control set point Driver firmware version MOP: MOP protection: suction temperature threshold (S2) High evaporation temperature threshold Valve position Current cooling capacity Extended measured probe S1 (*) Extended measured probe S3 (*) Valve emergency closing speed Control mode (SIAM comp.) Low suction temperature LAN error EEPROM damaged Probe S1 Probe S2 Probe S3 Probe S4 EEV motor error Relay status LOP (low evaporation temperature) MOP (high evaporation temperature) LowSH (low superheat) High Tcond (high condensing temperature ) DI1 digital input status DI2 digital input status Enable EVD control Adaptive control ineffective Default 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 4 0 0 0 30 50 0 0 0 0 150 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Min -20 (-290) -60 (-870) -20 (-290) -60 (-76) -60 (-76) -60 (-76) -20 (-290) -60 (-76) -20 (-290) -40 (-72) -20 (-290) -60 (-76) -60 (-76) -20 (-290) -20 (-290) -60 (-76) 0 -20 (-290) 4 0 -60 (-870) 0 -60 (-76) LOP: threshold 0 0 -2000 (-2901) -2000 (-2901) 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Max 200 (2900) 200 (2900) 200 (2900) 200 (392) 200 (392) 200 (392) 200 (2900) 200 (392) 200 (2900) 180 (324) 200 (2900) 200 (392) 200 (392) 200 (2900) 200 (2900) 200 (392) 100 200 (2900) 20 10 200 (2900) 10 200(392) 200 (392) 9999 100 20000 (29007) 20000 (29007) 2000 3 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Type A A A A A A A A A A A A A A A A A A A A A A A A I I I I I I D D D D D D D D D D D D D D D D D CAREL SVP 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 25 102 107 4 7 83 84 86 89 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 22 40 Modbus® 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 24 101 106 131 134 210 211 213 216 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 21 39 R/W R R R R R R R R R R R R R R R R R R R R R R R/W R/W R R/W R R R/W R/W R R R R R R R R R R R R R R R R/W R Mains power failure 0 0 1 D 45 44 R Regulation backup from supervisor 0 0 1 D 46 45 R/W Forced valve closing not completed 0 0 1 D 49 48 R/W Tab. 8.b (*) The displayed variable is to be divided by 100, and allows us to appreciate the hundredth of a bar (psig). Type of variable: A= analogue, D= digital, I= integer SVP= variable address with CAREL protocol on 485 serial card. Modbus®: variable address with Modbus® protocol on 485 serial card. “EVD evolution” +0300005EN - rel. 3.0 - 18.06.2010 40 ENG 8.3 Variables used based on the type of control Valve opening(%) Valve position (step) Current unit cooling capacity Control setpoint Superheat Suction temperature Evaporation temperature Evaporation pressure Condensing temperature Condensing pressure Modulating thermostat temperature EPR pressure (back pressure) Hot gas bypass pressure Hot gas bypass temperature CO2 gas cooler outlet temperature CO2 gas cooler outlet pressure CO2 gas cooler pressure set point S1 probe measurement S2 probe measurement S3 probe measurement S4 probe measurement 4 to 20 mA input value 0 to 10 Vdc input value DI1 digital input status (*) DI2 digital input status (*) EVD firmware version Display firmware version Adaptative regulation status 0= Not enabled or stopped 1= Monitoring superheat 2= Monitoring suction temperature 3= Wait superheat stabilisation 4= Wait suction temperature stabilisation 5= Applying step 6= Positioning valve 7= Sampling response to step 8=Wait stabilisation in response to step 9= Wait tuning improvement 10= Stop, max attempts exceeded Last tuning result 0= No attempt performed 1= Attempt interrupted 2= Step application error 3= Time constant/delay error 4= Model error 5= Tuning ended successfully on suction temperature 6= Tuning ended successfully on superheat Discharge superheat Discharge temperature • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • I/O expander for pCO AC/chiller with SIAM ANB scroll compressor Superheat regulation with 2 temperature probes AC or chiller with Digital Scroll compressor Transcritical CO2 Hot gas bypass / temperature • • • • • • • • EPR back pressure Main control Superheat control Auxiliary control High Tcond Modulating thermostat Variable displayed Hot gas bypass / pressure 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 as follows to display the variables: • press UP/DOWN; • press the DOWN button to move to the next variable/screen; • press Esc to return to the standard display. • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • Tab. 8.c (*) Digital input status: 0= open, 1= closed. Note: the readings of probes S1, S2, S3, S4 are always displayed, regardless of whether or not the probe is connected. 41 “EVD evolution” +0300005EN - rel. 3.0 - 18.06.2010 ENG 9. ALARMS 9.1 Alarms Note: the alarm LED comes on to signal a mains power failure only if the EVBAT*** module (accessory) has been connected, guaranteeing the power required to close the valve. The display shows both types of alarms, in two different modes: • system alarm: on the main page, the ALARM message is displayed, flashing. Pressing the Help button displays the description of the alarm and, at the top right, the total number of active alarms. There are two types of alarms: • system: valve motor, EEPROM, probe and communication; • control: 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 control. All the alarms are reset automatically, once the causes are no longer present. The alarm relay contact will open if the relay is configured as alarm relay using the corresponding parameter. The signalling of the alarm event on the driver depends on whether the LED board or the display board is fitted, as shown in the table below. D;; 6A6GB Hjgg^hXVaYVb# )#.@ 6eZgijgV kVakdaV )) :Zegdb YVccZ\\^ViV GZaZ Note: the alarm LED only comes on for the system alarms, and not for the control alarms. Fig. 9.b Example: display system alarm on LED board: • control alarm: next to the flashing ALARM message, the main page shows the type of protector activated. EVD evolution DC BDE 6A6GB Hjgg^hXVaYVb# )#.@ 6eZgijgV kVakdaV )) GZaZ Fig. 9.c Fig. 9.a Note: • to display the alarm queue, press the Help button and scroll using the UP/DOWN buttons; • the control alarms can be disabled by setting the corresponding timeout to zero. Table of alarms Type of alarm Cause of alarm LED Relay Reset Effect on control Checks/ solutions Probe S1 Probe S1 faulty or exceeded set alarm range red alarm ALARM flashing LED Depends on configuration parameter automatic Probe S2 Probe S2 faulty or exceeded set alarm range red alarm ALARM flashing LED Depends on configuration parameter automatic Probe S3 Probe S3 faulty or exceeded set alarm range red alarm ALARM flashing LED Depends on configuration parameter automatic Probe S4 Probe S4 faulty or exceeded set alarm range red alarm ALARM flashing LED Depends on configuration parameter automatic (LowSH) low superheat LowSH protection activated ALARM & LowSH flashing automatic (LOP) low evaporation temperature (MOP) high evaporation temperature (High Tcond) high conden temperature Low suction temperature LOP protection activated - ALARM & LOP flashing MOP protection activated - ALARM & MOP flashing High Tcond protection activated - ALARM & MOP flashing Depends on configuration parameter Depends on configuration parameter Depends on configuration parameter Depends on configuration parameter Depends on configuration parameter Depends on pa- Check the probe connections. rameter “S1 probe Check the “S1 probe alarm manag.”, alarm manag.” and “S1 alarm MIN & MAX pressure” parameters Depends on pa- Check the probe connections. Check rameter “S2 probe the “S2 probe alarm manag.”, and alarm manag.” “S2 alarm MIN & MAX temperature” parameters Depends on pa- Check the probe connections. rameter “S3 probe Check the “S3 probe alarm manag.”, alarm manag.” and “S3 alarm MIN & MAX pressure” parameters Depends on pa- Check the probe connections. Check rameter “S4 probe the “S4 probe alarm manag.”, and alarm manag.” “S4 alarm MIN & MAX temperature” parameters Protection action Check the “LowSH alarm threshold already active and timeout” parameters Threshold and timeout exceeded “EVD evolution” +0300005EN - rel. 3.0 - 18.06.2010 Display ALARM flashing 42 automatic Protection action Check the “LOP alarm threshold and already active timeout” parameters automatic Protection action Check the “MOP alarm threshold and already active timeout” parameters” automatic Protection action Check the “Hitcond alarm threshold already active and timeout” parameters” automatic No effect Check the threshold and timeout parameters. ENG Type of alarm Cause of alarm LED Relay Reset Effect on control Checks/ solutions EEPROM damaged EEPROM for operating and/or unit parameters damaged Valve motor fault, not connected red alarm ALARM flashing LED Depends on configuration parameter Replace driver/Contact service Total shutdown red alarm ALARM flashing LED automatic Interruption LAN network communication error LAN network connection error green NET LED flashing NET LED off No message Depends on configuration parameter Depends on configuration parameter Depends on configuration parameter No change Error message No change ALARM flashing No change EEV motor error LAN error Display connection error Adaptive control ineffective Battery discharged Wrong power supply mode (*) Connection error NET LED off No communication between driver and display Tuning failed Battery discharged or faulty or electrical connection interrupted DC driver power supply with “Power supply mode” parameter set to AC power supply Display ALARM flashing ALARM flashing automatic Check the connections and the condition of the motor Switch driver off and on again Control based on Check the network address settings DI1/DI2 automatic Control based on Check the connections and that the DI1/DI2 pCO is on and working automatic No effect replace the driver/display automatic No effect Check the connections and that the pCO is on and working Check the driver/display and the connectors No effect Change “Main control” parameter setting If the alarm persists for more than 3 hours (recharge time for EVBAT00500) replace the battery red alarm Alarm flashing LED flashing No change replace the battery No effect Green POWER LED flashingRed alarm LED Depends on the configuration parameter Change “Power supply mode” parameter setting Total shutdown - Replace the driver/Contact service Check the “Power supply mode” parameter and power supply Tab. 9.a (*) In the event of AC power supply with the “Power supply mode” parameter set to DC no alarm is displayed 9.2 Alarm relay configuration 9.3 Probe alarms 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: • alarm relay: during normal operation, the relay contact is closed, and opens when any alarm is activated. It can be used to switch off the compressor and the system in the event of alarms. • solenoid valve relay: during normal operation, the relay contact is closed, and is open only in standby. There is no change in the event of alarms. • solenoid valve relay + alarm: during normal operation, the relay contact is closed, and opens in standby and/or for LowSH, MOP, High Tcond and low suction temperature alarms. This is because following such alarms, the user may want to protect the unit by stopping the flow of refrigerant or switching off the compressor. The LOP alarm is excluded, as in the event of low evaporation temperature closing the solenoid valve would worsen the situation. The probe alarms are part of the system alarms. When the value measured by one of the probes is outside of the field defined by the parameters corresponding to the alarm limits, an alarm is activated. The limits can be set independently of the range of measurement. Consequently, the field outside of which the alarm is signalled can be restricted, to ensure greater safety of the controlled unit. Parameter/description Relay configuration: 1=Disabled 2=alarm relay (opened in case of alarm) 3=Solenoid valve relay (open in standby) 4=valve + alarm relay (opened in stand-by and control alarms) 5= Reversed alarm relay (closed in case of alarm) 6= Valve status relay (open if valve is closed) Note: • the alarm limits can also be set outside of the range of measurement, to avoid unwanted probe alarms. In this case, the correct operation of the unit or the correct signalling of alarms will not be guaranteed; • by default, after having selected the type of probe used, the alarm limits will be automatically set to the limits corresponding to the range of measurement of the probe. Parameter/description PROBESs S1 alarm MIN pressure (S1_ AL_MIN) S1 alarm MAX pressure (S1_ AL_MAX) S2 alarm MIN temp. (S2_AL_ MIN) S2 alarm MAX temp. (S2_AL_ MAX) S3 alarm MIN pressure (S3_ AL_MIN) S3 alarm MAX pressure (S3_ AL_MAX) S4 alarm MIN temp. (S4_AL_ MIN) S4 alarm MAX temp. (S4_AL_ MAX) Def. Alarm relay Tab. 9.b Def. Min. -1 9.3 -50 Max. -20 (-290) S1_AL_MAX barg (psig) S1_AL_MIN 200 (2900) barg (psig) -60 S2_AL_MAX °C/°F 105 S2_AL_MIN 200 (392) -1 9.3 -50 UOM °C (°F) -20 S3_AL_MAX barg (psig) S3_AL_MIN 200 (2900) barg (psig) -60 S4_AL_MAX °C/°F 105 S4_AL_MIN 200 (392) °C (°F) Tab. 9.c 43 “EVD evolution” +0300005EN - rel. 3.0 - 18.06.2010 ENG The behaviour of the driver in response to probe alarms can be configured, using the manufacturer parameters. The options are: • no action (control continues but the correct measurement of the variables is not guaranteed); • forced closing of the valve (control stopped); • valve forced to the initial position (control stopped); • use the backup probe (valid only for probe S1 and S2 alarms, control continues). Parameter/description CONFIGURATION S1 probe alarm manag.: 1=No action 2=Valve forced closed 3=Valve at fixed position 4=Use backup probe S3 S2 probe alarm manag.: 1=No action 2=Valve forced closed 3=Valve at fixed position 4=Use backup probe S4 S3 probe alarm manag.: 1=No action 2=Valve forced closed 3=Valve at fixed position S4 probe alarm manag.: 1=No action 2=Valve forced closed 3=Valve at fixed position CONTROL Valve opening at start-up (evaporator/valve capacity ratio) Relay activation for control alarms As mentioned in the paragraph on the configuration of the relay, in the event of LowSH, MOP, High Tcond and low suction temperature alarms, the driver relay will open both when 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. Def. Valve at fixed position Valve at fixed position No action No action 50 Tab. 9.d 9.4 Control alarms Parameter/description CONTROL LowSH protection threshold Def. Min. 5 LowSH protection integration time LOP protection threshold 15 -50 LOP protection integration time MOP protection threshold 0 50 MOP protection integration time ADVANCED High Tcond threshold High Tcond integration time ALARM CONFIGURATION Low superheat alarm timeout (LowSH) (0= alarm DISABLED) Low evaporation temperature alarm timeout (LOP) (0= alarm DISABLED) High evaporation temperature alarm timeout (MOP) (0= alarm DISABLED) High condensing temperature alarm timeout (High Tcond) (0= alarm DISABLED) Low suction temperature alarm threshold Low suction temperature alarm timeout 20 -40 (-72) superheat set point 0 800 -60 (-76) MOP threshold 0 800 LOP th- 200 (392) reshold. 0 800 80 20 -60 (-76) 200 (392) 0 800 °C (°F) s 300 0 18000 s 300 0 18000 s 600 0 18000 s 600 0 18000 s -50 -60 (-76) 200 (392) °C (°F) 300 0 s These are alarms that are only activated during regulation. Max. 18000 UOM K (°F) s °C (°F) s °C (°F) s Tab. 9.e Protector alarms The alarms corresponding to the LowSH, LOP, MOP and High Tcond protectors are only activated during control when the corresponding activation threshold is exceeded, and only when the timeout defined by the corresponding parameter has elapsed. If a protector is not enabled (integration time= 0 s), no alarm will be signalled. If before the expiry of the timeout, the protector control variable returns back inside the corresponding threshold, no alarm will be signalled. 9.5 EEV motor alarm At the end of the commissioning procedure and whenever the driver is powered up, the valve motor error recognition procedure is activated. This preceded the forced closing procedure and lasts around 10 s. The valve is kept stationary to allow any valve motor faults or missing or incorrect connections to be detected. In any of these cases, the corresponding alarm is activated, with automatic reset. The driver will go into wait status, as it can longer control the valve. The procedure can be avoided by keeping the respective digital input closed for each driver. In this case, after having powered up the driver, forced closing of the valve is performed immediately. Note: this is a likely event, as during the timeout, the protection function will have an effect. If the timeout relating to the control alarms is set to 0 s, the alarm is disabled. The protectors are still active, however. The alarms are reset automatically. 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. Low suction temperature alarm The low suction temperature alarm is not linked to any protection function. It features a threshold and a timeout, and is useful in the event of probe or valve malfunctions to protect the compressor using the relay to control the solenoid valve or to simply signal a possible risk. In fact, the incorrect measurement of the evaporation pressure or incorrect configuration of the type of refrigerant may mean the superheat calculated is much higher than the actual value, causing an incorrect and excessive opening of the valve. A low suction temperature measurement may in this case indicate the probable flooding of the compressor, with corresponding alarm signal. If the alarm timeout is set to 0 s, the alarm is disabled. The alarm is reset automatically, with a fixed differential of 3°C above the activation threshold. “EVD evolution” +0300005EN - rel. 3.0 - 18.06.2010 44 ENG 9.6 LAN error alarm If the connection to the LAN network is offline for more than 6s due to an electrical problem, the incorrect configuration of the network addresses or the malfunction of the pCO controller, a LAN error alarm will be signalled. The LAN error affects the control of the driver as follows: • case 1: unit in standby, digital input DI1/DI2 disconnected; the driver will remain permanently in standby and control will not be able to start; • case 2: unit in control, digital input DI1/DI2 disconnected: the driver will stop control and will go permanently into standby; • case 3: unit in standby, digital input DI1/DI2 connected: the driver will remain in standby, however control will be able to start if the digital input is closed. In this case, it will start with “current cooling capacity”= 100%; • case 4: unit in control, digital input DI1/DI2 connected: the driver will remain in control status, maintaining the value of the “current cooling capacity”. If the digital input opens, the driver will go to standby and control will be able to start again when the input closes. In this case, it will start with “current cooling capacity”= 100% 45 “EVD evolution” +0300005EN - rel. 3.0 - 18.06.2010 ENG 10. TROUBLESHOOTING The following table lists a series of possible malfunctions that may occur when starting and operating the driver and the electronic valve. These cover the most common problems and are provided with the aim of offering an initial response for resolving the problem. PROBLEM CAUSE SOLUTION The superheat value measu- The probe does not measure correct values Check that the pressure and the temperature measured are correct and that the probe red is incorrect 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- The type of valve set is incorrect Check and correct the type of valve parameter. The valve is connected incorrectly (rotates Check the movement of the valve by placing it in manual control and closing or opepressor during control in reverse) and is open ning it completely. One complete opening must bring a decrease in the superheat and vice-versa. If the movement is reversed, check the electrical connections. The superheat set point is too low Increase the superheat set point. Initially set it to 12 °C and check that there is no longer return of liquid. Then gradually reduce the set point, always making sure there is no return of liquid. Low superheat protection ineffective If the superheat remains low for too long with the valve that is slow to close, increase the low superheat threshold and/or decrease the low superheat integration time. Initially set the threshold 3 °C below the superheat set point, with an integration time of 3-4 seconds. Then gradually lower the low superheat threshold and increase the low superheat integration time, checking that there is no return of liquid in any operating conditions. Stator broken or connected incorrectly Disconnect the stator from the valve and the cable and measure the resistance of the windings using an ordinary tester. The resistance of both should be around 36 ohms. Otherwise replace the stator. Finally, check the electrical connections of the cable to the driver. Valve stuck open Check if the superheating is always low (<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 Decrease the value of the “Valve opening at start-up” parameter on all the utilities, is too high on many cabinets in which making sure that there are no repercussions on the control temperature. the control set point is often reached (for multiplexed cabinets only) Liquid returns to the com- The pause in control after defrosting is too Increase the value of the “valve control delay after defrosting” parameter. pressor only after defrosting short The superheat temperature measured Check that the LowSH threshold is greater than the superheat value measured and that (for multiplexed cabinets by the driver after defrosting and before the corresponding protection is activated (integration time >0 s). If necessary, decrease only) reaching operating conditions is very low the value of the integration time. for a few minutes The superheat temperature measured by Set more reactive parameters to bring forward the closing of the valve: increase the the driver does not reach low values, but proportional factor to 30, increase the integration time to 250 s and increase the derithere is still return of liquid to the compres- vative time to 10 sec. sor rack Many cabinets defrosting at the same time Stagger the start defrost times. If this is not possible, if the conditions in the previous two points are not present, increase the superheat set point and the LowSH thresholds by at least 2 °C on the cabinets involved. The valve is significantly oversized Replace the valve with a smaller equivalent. Liquid returns to the com- The “valve opening at start-up” parameter is Check the calculation in reference to the ratio between the rated cooling capacity of pressor only when starting set too high the evaporator and the capacity of the valve; if necessary, lower the value. the controller (after being OFF) The superheat value swings The condensing pressure swings Check the controller condenser settings, giving the parameters “blander” values (e.g. around the set point with an increase the proportional band or increase the integration time). Note: the required amplitude greater than 4°C stability involves a variation within +/- 0.5 bars. If this is not effective or the settings cannot be changed, adopt electronic valve control parameters for perturbed systems The superheat swings even with the valve Check for the causes of the swings (e.g. low refrigerant charge) and resolve where posset in manual control (in the position cor- sible. If not possible, adopt electronic valve control parameters for perturbed systems. responding to the average of the working values) The superheat does NOT swing with the As a first approach , decrease (by 30 to 50 %) the proportional factor. Subsequently try valve set in manual control (in the position increasing the integration time by the same percentage. In any case, adopt parameter corresponding to the average of the settings recommended for stable systems. working values) The superheat set point is too low Increase the superheat set point and check that the swings are reduced or disappear. Initially set 13 °C, then gradually reduce the set point, making sure the system does not start swinging again and that the unit temperature reaches the control set point. In the start-up phase with MOP protection disabled or ineffective Activate the MOP protection by setting the threshold to the required saturated evahigh evaporator tempeporation temperature (high evaporation temperature limit for the compressors) and ratures, the evaporation setting the MOP integration time to a value above 0 (recommended 4 seconds). To pressure is high make the protection more reactive, decrease the MOP integration time. Refrigerant charge excessive for the system Apply a “soft start” technique, activating the utilities one at a time or in small groups. If or extreme transitory conditions at start-up this is not possible, decrease the values of the MOP thresholds on all the utilities. (for cabinets only). “EVD evolution” +0300005EN - rel. 3.0 - 18.06.2010 46 ENG PROBLEM In the start-up phase the low pressure protection is activated (only for selfcontained units) CAUSE The “Valve opening at start-up” parameter is set too low The driver in pLAN or tLAN configuration does not start control and the valve remains closed The driver in stand-alone configuration does not start control and the valve remains closed LOP protection disabled LOP protection ineffective Solenoid blocked Insufficient refrigerant The valve is connected incorrectly (rotates in reverse) and is open Stator broken or connected incorrectly Valve stuck closed The unit switches off due to LOP protection disabled low pressure during control LOP protection ineffective (only for self-contained units) Solenoid blocked Insufficient refrigerant The valve is significantly undersized Stator broken or connected incorrectly Valve stuck closed The cabinet does not reach Solenoid blocked the set temperature, despite the value being opened to Insufficient refrigerant the maximum (for multiplexed cabinets only) The valve is significantly undersized Stator broken or connected incorrectly Valve stuck closed The cabinet does not reach the set temperature, and the position of the valve is always 0 (for multiplexed cabinets only) SOLUTION Check the calculation in reference to the ratio between the rated cooling capacity of the evaporator and the capacity of the valve; if necessary lower the value. 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. Check the connection of the digital input. Check that when the control signal is sent that the input is closed correctly. Check that the driver is in stand-alone mode. Set a LOP integration time greater than 0 s. Make sure that the LOP protection threshold is at the required saturated evaporation temperature (between the rated evaporation temperature of the unit and the corresponding temperature at the calibration of the low pressure switch) and decrease the value of the LOP integration time. Check that the solenoid opens correctly, check the electrical connections and the operation of the relay. 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. Check the movement of the valve by placing it in manual control and closing or opening it completely. One complete opening must bring a decrease in the superheat and vice-versa. If the movement is reversed, check the electrical connections. Disconnect the stator from the valve and the cable and measure the resistance of the windings using an ordinary tester. The resistance of both should be around 36 ohms. Otherwise replace the stator. Finally, check the electrical connections of the cable to the driver (see paragraph 5.1). 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. Set a LOP integration time greater than 0 s. Make sure that the LOP protection threshold is at the required saturated evaporation temperature (between the rated evaporation temperature of the unit and the corresponding temperature at the calibration of the low pressure switch) and decrease the value of the LOP integration time. Check that the solenoid opens correctly, check the electrical connections and the operation of the control relay. 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. Replace the valve with a larger equivalent. 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. 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. Check that the solenoid opens correctly, check the electrical connections and the operation of the relay. 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. Replace the valve with a larger equivalent. 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. 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. 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. Check the connection of the digital input. Check that when the control signal is sent that the input is closed correctly. Check that the driver is in stand-alone mode. The driver in pLAN or tLAN configuration does not start control and the valve remains closed The driver in stand-alone configuration does not start control and the valve remains closed Tab. 10.a 47 “EVD evolution” +0300005EN - rel. 3.0 - 18.06.2010 ENG 11. TECHNICAL SPECIFICATIONS Power supply (Lmax= 5 m) Power input • • • • Emergency power supply Insulation between relay output and other outputs Motor connection 22 Vdc+/-5%. (If the optional EVBAT00200/300 module is installed), Lmax= 5 m reinforced; 6 mm in air, 8 mm on surface; 3750 V insulation Digital input connection Probes (Lmax=10 m; S1 less than 30 m with shielded cable) S2 S3 S4 Relay output Power to active probes (VREF) RS485 serial connection tLAN connection pLAN connection Assembly Connectors Dimensions Operating conditions Storage conditions Index of protector Environmental pollution Resistance to heat and fire Immunity against voltage surges Type of relay action Class of insulation Software class and structure Conformity 24 Vac (+10/-15%) to be protected by external 2 A type T fuse. 24 Vdc (+10/-15%) 50/60 Hz to be protected by external 2 A type T fuse. Use a dedicated class 2 transformer (max 100 VA). 16.2 W with ALCO EX7/EX8 valves, 9.2 W with all other valves 35 VA with EVBAT00400; 35 VA with ALCO EX7/EX8 valves; 20 VA without EVBAT00400 and with all other valves 4-wire shielded cable i.e. CAREL code E2VCABS*00, or 4-wire shielded cable AWG 22 Lmax= 10 m; or 4-wire shielded cable AWG 14 Lmax= 50 m Digital input to be activated from voltage-free contact or transistor to GND. Closing current 5 mA; Lmax= 30 m ratiometric pressure probe (0 to 5 V): • resolution 0.1 % FS; • measurement error: 2% FS maximum; 1% typical electronic pressure probe (4 to 20 mA): • resolution 0.5 % FS; • measurement error: 8% FS maximum; 7% typical remote electronic pressure probe(4 to 20 mA), maximum number of drivers connected= 5: • resolution 0.1 % FS; • measurement error: 2 % FS maximum; 1 % typical 4 to 20 mA input (max 24 mA): • resolution 0.5 % FS; • measurement error: 8% FS maximum; 7% typical low temperature NTC: • 10kΩ at 25°C, -50T90 °C; • measurement error: 1°C in the range -50T50°C; 3 °C in the range +50T90 °C high temperature NTC: • 50kΩ 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: • 10kΩ at 25 °C, -40T120 °C; • measurement error: 1 °C in the range -40T50°C; 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 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 low temperature NTC: • 10kΩ at 25°C, -50T105 °C; • measurement error: 1 °C in the range -50T50 °C; 3°C in the range 50T90°C high temperature NTC: • 50kΩ 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: • 10kΩ at 25 °C, -40T120 °C; • measurement error 1 °C in the range -40T50 °C; 3 °C in the range +50T90 °C normally open contact; 5 A, 250 Vac resistive load; 2 A, 250 Vac inductive load (PF=0 .4); Lmax=10 m programmable output: +5 Vdc+/-2% or 12 Vdc+/-10% Lmax=1000 m, shielded cable Lmax=30 m, shielded cable Lmax=500 m, shielded cable DIN rail plug-in, cable size 0.5 to 2.5 mm2 (12 to 20 AWG) LxHxW= 70x110x60 -10T60°C; <90% rH non-condensing -20T70°C, humidity 90% rH non-condensing IP20 2 (normal) Category D Category 1 1C microswitching II A 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, EN55014-2, EN61000-3-3. Tab. 11.a “EVD evolution” +0300005EN - rel. 3.0 - 18.06.2010 48 ENG 12. APPENDIX: VPM (VISUAL PARAMETER MANAGER) 12.1 Installation On the http://ksa.carel.com website, under the Parametric Controller Software section, select Visual Parameter Manager. A window opens, allowing 3 files to be downloaded: 1. VPM_CD.zip: for burning to a CD; 2. Upgrade setup; 3. Full setup: the complete program. For first installations, select Full setup, for upgrades select Upgrade setup. The program is installed automatically, by running setup.exe. Note: if deciding to perform the complete installation (Full setup), first uninstall any previous versions of VPM. 12.2 Programming (VPM) When opening the program, the user needs to choose the device being configured: EVD evolution. The Home page then opens, with the choice to create a new project or open an existing project. Choose new project and enter the password, which when accessed the first time can be set by the user. Fig. 12.c 5. select the model from the range and create a new project or choose an existing project: select “Device model”. A new project can be created, making the changes and then connecting later on to transfer the configuration (OFFLINE mode). Enter at the Service or Manufacturer level. • select Device model and enter the corresponding code Fig. 12.d Fig. 12.a • go to Configure device: the list of parameters will be displayed, Then the user can choose to: 4. directly access to the list of parameters for the EVD evolution saved to EEPROM: select “tLAN”; allowing the changes relating to the application to be made. 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.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 -> Save parameter list. Fig. 12.b To transfer the parameters to the driver, choose the “Write” command. During the write procedure, the 2 LEDs on the converter will flash. 49 “EVD evolution” +0300005EN - rel. 3.0 - 18.06.2010 ENG Fig. 12.f Note: the program On-line help can be accessed by pressing F1. 12.3 Copying the setup On the Configure device page, once the new project has been created, to transfer the list of configuration parameters to another driver: • read the list of parameters from the source driver with the “Read” command; • remove the connector from the service serial port; • connect the connector to the service port on the destination driver; • write the list of parameters to the destination driver with the “Write” command. Important: the parameters can only be copied between controllers with the same code. Different firmware versions may cause compatibility problems. 12.4 Setting the default parameters When the program opens: • select the model from the range and load the associated list of parameters; • go to “Configure device”: the list of parameters will be shown, with the default settings. • connect the connector to the service serial port on the destination driver; • during the write procedure, the LEDs on the converter will flash. The driver parameters driver will now have the default settings. 12.5 Updating the driver and display firmware The driver and display firmware must be updated using the VPM program on a computer and the USB/tLAN converter, which is connected to the device being programmed (see paragraph 2.5 for the connection diagram). The firmware can be downloaded from http://ksa.carel.com. See the VPM On-line help. “EVD evolution” +0300005EN - rel. 3.0 - 18.06.2010 50 CAREL INDUSTRIES HeadQuarters Via dell’Industria, 11 - 35020 Brugine - Padova (Italy) Tel. (+39) 049.9716611 - Fax (+39) 049.9716600 e-mail: [email protected] - www.carel.com +0300005EN - rel. 3.0 - 18.06.2010 Agenzia / Agency: ">
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Key features
DIN rail assembly
plug-in screw terminals
refrigerant superheat control
efficiency optimization
compatibility with various refrigerants and valves
low superheat, high evaporation pressure (MOP), low evaporation pressure (LOP) and high condensing temperature protection
adaptive control
network connectivity via tLAN, pLAN, RS485/Modbus®
configuration and programming by display, computer using the VPM program or by PlantVisor/PlantVisorPro supervisor and pCO programmable controller
Frequently asked questions
The EVD evolution driver is designed to control electronic expansion valves in refrigerant circuits, optimizing the efficiency and superheat control of the system.
The EVD evolution driver is compatible with various types of refrigerants and valves, including those used in chillers, air-conditioners, and refrigerators, including subcritical and transcritical CO2 systems.
You can configure and program the driver using either the provided display, a computer with the VPM program, or a PlantVisor/PlantVisorPro supervisor and pCO programmable controller.