User manual. EVD evolution. electronic expansion valve driver. Integrated Control Solutions & Energy Savings READ CAREFULLY IN THE TEXT!

Transcription

1 EVD evoluion elecronic expansion valve driver User manual NO POWER & SIGNAL CABLES TOGETHER READ CAREFULLY IN THE TEXT! Inegraed Conrol Soluions & Energy Savings

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3 WARNINGS DISPOSAL CAREL bases he developmen of is producs on decades of experience in HVAC, on he coninuous invesmens in echnological innovaions o producs, procedures and sric qualiy processes wih in-circui and funcional esing on 100% of is producs, and on he mos innovaive producion echnology available on he marke. CAREL and is subsidiaries noneheless canno guaranee ha all he aspecs of he produc and he sofware included wih he produc respond o he requiremens of he final applicaion, despie he produc being developed according o sar-of-hear echniques. The cusomer (manufacurer, developer or insaller of he final equipmen) acceps all liabiliy and risk relaing o he configuraion of he produc in order o reach he expeced resuls in relaion o he specific final insallaion and/or equipmen. CAREL may, based on specific agreemens, acs as a consulan for he posiive commissioning of he final uni/applicaion, however in no case does i accep liabiliy for he correc operaion of he final equipmen/sysem. The CAREL produc is a sae-of-he-ar produc, whose operaion is specified in he echnical documenaion supplied wih he produc or can be downloaded, even prior o purchase, from he websie Each CAREL produc, in relaion o is advanced level of echnology, requires seup/configuraion/programming/commissioning o be able o operae in he bes possible way for he specific applicaion. The failure o complee such operaions, which are required/indicaed in he user manual, may cause he final produc o malfuncion; CAREL acceps no liabiliy in such cases. Only qualified personnel may insall or carry ou echnical service on he produc. The cusomer mus only use he produc in he manner described in he documenaion relaing o he produc. In addiion o observing any furher warnings described in his manual, he following warnings mus be heeded for all CAREL producs: preven he elecronic circuis from geing we. Rain, humidiy and all ypes of liquids or condensae conain corrosive minerals ha may damage he elecronic circuis. In any case, he produc should be used or sored in environmens ha comply wih he emperaure and humidiy limis specified in he manual; do no insall he device in paricularly ho environmens. Too high emperaures may reduce he life of elecronic devices, damage hem and deform or mel he plasic pars. In any case, he produc should be used or sored in environmens ha comply wih he emperaure and humidiy limis specified in he manual; do no aemp o open he device in any way oher han described in he manual; do no drop, hi or shake he device, as he inernal circuis and mechanisms may be irreparably damaged; do no use corrosive chemicals, solvens or aggressive deergens o clean he device; do no use he produc for applicaions oher han hose specified in he echnical manual. All of he above suggesions likewise apply o he conrollers, serial boards, programming keys or any oher accessory in he CAREL produc porfolio. CAREL adops a policy of coninual developmen. Consequenly, CAREL reserves he righ o make changes and improvemens o any produc described in his documen wihou prior warning. The echnical specificaions shown in he manual may be changed wihou prior warning. The liabiliy of CAREL in relaion o is producs is specified in he CAREL general conrac condiions, available on he websie and/or by specific agreemens wih cusomers; specifically, o he exen where allowed by applicable legislaion, in no case will CAREL, is employees or subsidiaries be liable for any los earnings or sales, losses of daa and informaion, coss of replacemen goods or services, damage o hings or people, downime or any direc, indirec, incidenal, acual, puniive, exemplary, special or consequenial damage of any kind whasoever, wheher conracual, exra-conracual or due o negligence, or any oher liabiliies deriving from he insallaion, use or impossibiliy o use he produc, even if CAREL or is subsidiaries are warned of he possibiliy of such damage. INFORMATION FOR USERS ON THE CORRECT HANDLING OF WASTE ELECTRICAL AND ELEC- TRONIC EQUIPMENT (WEEE) In reference o European Union direcive 2002/96/EC issued on 27 January 2003 and he relaed naional legislaion, please noe ha: 1. WEEE canno be disposed of as municipal wase and such wase mus be colleced and disposed of separaely; 2. he public or privae wase collecion sysems defined by local legislaion mus be used. In addiion, he equipmen can be reurned o he disribuor a he end of is working life when buying new equipmen; 3. he equipmen may conain hazardous subsances: he improper use or incorrec disposal of such may have negaive effecs on human healh and on he environmen; 4. he symbol (crossed-ou wheeled bin) shown on he produc or on he packaging and on he insrucion shee indicaes ha he equipmen has been inroduced ono he marke afer 13 Augus 2005 and ha i mus be disposed of separaely; 5. in he even of illegal disposal of elecrical and elecronic wase, he penalies are specified by local wase disposal legislaion. Warrany on he maerials: 2 years (from he dae of producion, excluding consumables). Approval: he qualiy and safey of CAREL INDUSTRIES producs are guaraneed by he ISO 9001 cerified design and producion sysem, as well as by he marks (*). WARNING: separae as much as possible he probe and digial inpu signal cables from he cables carrying inducive loads and power cables o avoid possible elecromagneic disurbance. Never run power cables (including he elecrical panel wiring) and signal cables in he same conduis. NO POWER & SIGNAL CABLES TOGETHER READ CAREFULLY IN THE TEXT! 3

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5 Conen 1. INTRODUCTION Models Funcions and main characerisics INSTALLATION DIN rail assembly and dimensions Descripion of he erminals Connecion diagram - superhea conrol Insallaion Valve operaion in parallel and complemenary mode Shared pressure probe Connecing he module EVBAT Connecing he USB-LAN converer Connecing he USB/RS485 converer Upload, Download and Rese parameers (display) Show elecrical connecions (display) General connecion diagram USER INTERFACE Assembling he display board (accessory) Display and keypad Display mode (display) Programming mode (display) COMMISSIONING Commissioning Guided commissioning procedure (display) Auxiliary refrigeran Checks afer commissioning Oher funcions CONTROL Main and auxiliary conrol Superhea conrol Adapive conrol and auouning Conrol wih Emerson Climae Digial Scroll compressor BLDC Conrol wih compressor Superhea regulaion wih 2 emperaure probes Advanced regulaion Auxiliary conrol FUNCTIONS Power supply mode Nework connecion Inpus and oupus Conrol saus Advanced conrol saus PROTECTORS Proecors PARAMETERS TABLE Uni of measure Variables accessible via serial connecion Variables used based on he ype of conrol ALARMS Alarms Alarm relay confi guraion Probe alarms Conrol alarms EEV moor alarm LAN error alarm TROUBLESHOOTING TECHNICAL SPECIFICATIONS APPENDIX: VPM (VISUAL PARAMETER MANAGER) Insallaion Programming (VPM) Copying he seup Seing he defaul parameers Updaing he driver and display fi rmware

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7 1. INTRODUCTION EVD evoluion is a driver for double pole sepper moors designed o conrol he elecronic expansion valve in refrigeran circuis. I is designed for DIN rail assembly and is fied wih plug-in screw erminals. I conrols refrigeran superhea and opimises he efficiency of he refrigeran circui, guaraneeing maximum flexibiliy, being compaible wih various ypes of refrigerans and valves, in applicaions wih chillers, air-condiioners and refrigeraors, he laer including subcriical and ranscriical CO 2 sysems. I feaures low superhea (LowSH), high evaporaion pressure (MOP), low evaporaion pressure (LOP) and high condensing emperaure proecion (also for CO 2 cascade sysems), and can manage, as an alernaive o superhea conrol, special funcions such as he ho gas bypass, he evaporaor pressure conrol (EPR) and conrol of he valve downsream of he gas cooler in ranscriical CO 2 circuis. In he versions for CAREL valves, if inegraed wih a specific CAREL pco conroller via LAN, he driver can conrol one of he following: an elecronic expansion valve in a refrigeran circui wih Emerson Climae Technologies Digial Scroll compressor; an elecronic expansion valve in a refrigeran circui wih BLDC compressor. In his case he compressor mus be conrolled by he CAREL Power+ speed drive (wih inverer), his in urn conneced o he pco conroller. The EVD evoluion driver can conrol an elecronic expansion valve in a refrigeran circui wih Digial Scroll compressor, if inegraed wih a specific CAREL conroller via LAN. In addiion, i feaures adapive conrol ha can evaluae he effeciveness of superhea conrol and if necessary acivae one or more uning procedures. Togeher wih superhea conrol, i can manage an auxiliary conrol funcion seleced beween condensing emperaure proecion and modulaing hermosa. As regards nework conneciviy, he driver can be conneced o eiher of he following: a pco programmable conroller o manage he conroller via plan, LAN and RS485/Modbus ; a PlanVisorPRO supervisor via RS485/Modbus. In his case, On/Off conrol is performed via digial inpu 1 or 2, if suiably configured. As well as conrol sar/sop, digial inpus 1 and 2 can be configured for he following: - opimised valve conrol afer defros; - Valve forced open (100%); - conrol backup; - conrol safey. The second digial inpu is available for opimised defros managemen. Anoher possibiliy involves operaion as a simple posiioner wih 4 o 20 ma or 0 o 10 Vdc analogue inpu signal. EVD evoluion comes wih a LED board o indicae he operaing saus, or a graphic display (accessory) ha can be used o perform insallaion, following a guided commissioning procedure involving seing jus 4 parameers: refrigeran, valve, pressure probe, ype of main conrol (chiller, showcase, ec.). The procedure can also be used o check ha he probe and valve moor wiring is correc. Once insallaion is complee, he display can be removed, as i is no necessary for he operaion of he driver, or alernaively kep in place o display he significan sysem variables, any alarms and when necessary se he conrol parameers. The driver can also be seup using a compuer via he service serial por. In his case, he VPM program (Visual Parameer Manager) needs o be insalled, downloadable from hp://ksa.carel.com, and he USB-LAN converer EVDCNV00E0 conneced. Only on RS485/ Modbus models can he insallaion procedure be managed as described above by compuer, using he serial por (see paragraph 2.8) in place of he service serial por. The universal models can drive all ypes of valves, while he CAREL models only drive CAREL valves. 1.1 Models Code Descripion EVD0000E00 EVD evoluion universal - LAN EVD0000E01 EVD evoluion universal - LAN, muliple pack of 10 pcs (*) EVD0000E10 EVD evoluion universal - plan EVD0000E11 EVD evoluion universal - plan, muliple pack of 10 pcs (*) EVD0000E20 EVD evoluion universal - RS485/Modbus EVD0000E21 EVD evoluion universal - RS485/Modbus, muliple pack of 10 pcs (*) EVD0000E30 EVD evoluion for CAREL valves - LAN EVD0000E31 EVD evoluion for CAREL valves - LAN, muliple pack 10 pcs (*) EVD0000E40 EVD evoluion for CAREL valves - plan EVD0000E41 EVD evoluion for CAREL valves - plan, muliple pack 10 pcs (*) EVD0000E50 EVD evoluion for CAREL valves - RS485/Modbus EVD0000E51 EVD evoluion for CAREL valves - RS485/Modbus, muliple pack 10 pcs EVD0002E10 EVD evoluion universal - plan opo-isolaed EVD0002E20 EVD evoluion universal - RS485/Modbus opo-isolaed Tab. 1.a (*)The codes wih muliple packages are sold wihou connecors, available separaely in code EVDCON Funcions and main characerisics In summary: elecrical connecions by plug-in screw erminals; serial card incorporaed in he driver, based on he model (LAN, plan, RS485/Modbus ); compaibiliy wih various ypes of valves ( universal models only) and refrigerans; acivaion/deacivaion of conrol via digial inpu 1 or remoe conrol via LAN, from pco programmable conroller; superhea conrol wih proecion funcions for low superhea, MOP, LOP, high condensing emperaure; adapive superhea conrol; funcion o opimise superhea conrol for air-condiioning unis fied wih Emerson Climae Digial Scroll compressor. In his case, EVD Evoluion mus be conneced o a CAREL pco series conroller running an applicaion program ha can manage unis wih Digial Scroll compressors. This funcion is only available on he conrollers for CAREL valves; configuraion and programming by display (accessory), by compuer using he VPM program or by PlanVisor/PlanVisorPro supervisor and pco programmable conroller; commissioning simplified by display wih guided procedure for seing he parameers and checking he elecrical connecions; muli-language graphic display, wih help funcion on various parameers; managemen of differen unis of measure (meric/imperial); parameers proeced by password, accessible a a service (insaller) and manufacurer level; copy he configuraion parameers from one driver o anoher using he removable display; raiomeric or elecronic 4 o 20 ma pressure ransducer, he laer can be shared beween up o 5 drivers, useful for muliplexed applicaions; possibiliy o use S3 and S4 as backup probes in he even of fauls on he main probes and ; 4 o 20 ma or 0 o 10 Vdc inpu o use he driver as a posiioner conrolled by an exernal signal; managemen of power failures wih valve closing (only for drivers wih 24 Vac power supply and conneced o he EVD0000UC0 accessory); advanced alarm managemen. 7

8 For sofware versions higher han 4.0, he following new funcions have been inroduced: 24 Vac or 24 Vdc power supply, in he laer case wihou valve closing in he even of power failures; pre-posiion ime seable by parameer; use of digial o sar/sop conrol when here is no communicaion wih he pco programmable conroller; possibiliy o conrol he elecronic expansion valve in a refrigeran circui wih brushless DC moor (BLDC) compressor, conrolled by CAREL Power+ speed drive (wih inverer). New funcions have been inroduced wih sofware revision 5.0 and higher: managemen of new refrigerans; possibiliy o manage CO 2 cascade sysems, seing he refrigeran on he primary circui and on he secondary circui; high condensing emperaure proecion (Reverse HiTcond) for CO 2 cascade sysems; subcooling measuremen; valve posiion in sandby seable by parameer. Series of accessories for EVD evoluion Display (code EVDIS00**0) Easily applicable and removable a any ime from he fron panel of he driver, during normal operaion displays all he significan sysem variables, he saus of he relay oupu and recognises he acivaion of he proecion funcions and alarms. During commissioning, i guides he insaller in seing he parameers required o sar he insallaion and, once compleed, can copy he parameers o oher drivers. The models differ in he firs seable language, he second language for all models is English. EVDIS00**0 can be used o configure and monior all he conrol parameers, accessible via password a a service (insaller) and manufacurer level. USB/RS485 converer (code CVSTDUMOR0) The converer is used o connec he configuraion compuer and he EVD evoluion conrollers, for RS485/Modbus models only. Fig. 1.c Ulracap module (P/N EVD0000UC0) The module, mouned on DIN rail, guaranees emporary power o he driver in he even of power failures, for enough ime o immediaely close he conneced elecronic valves (one or wo). I avoids he need o insall a solenoid valve. The module is made using Ulracap sorage capaciors, which ensure reliabiliy in erms of much longer componen life han a module made wih lead baeries. In jus 4 minues he module is ready o power wo Carel valves again (or 5 minues for pairs or oher brand valves). Fig. 1.d Valve cable E2VCABS*00 (IP67) Shielded cable wih buil-in connecor for connecion o he valve moor. The connecor code E2VCON0000 (IP65) can also be purchased on is own, o be wired. Fig. 1.a USB/LAN converer (code EVDCNV00E0) The USB-LAN converer is conneced, once he LED board cover has been removed, o he service serial por underneah. Fied wih cables and connecors, i can connec EVD evoluion direcly o a compuer, which, using he VPM program, can configure and program he driver. VPM can also be used o updae he driver and display firmware. Fig. 1.e Fig. 1.b 8

9 G EVD4 service USB adaper PC ENG 2. INSTALLATION 2.1 DIN rail assembly and dimensions EVD evoluion is supplied wih screen-prined connecors o simplify wiring. 2.3 Connecion diagram - superhea conrol CAREL E X V G0 VBAT COM 1 NO 1 Power Supply E X V connecion Relay EVD evoluion Vac 24 Vac shield S 11 20VA(*) 2 AT G G0 G G0 VBAT COMA NOA Analog Digial Inpu Nework GND V REF S3 S4 DI1 DI2 GND Tx/Rx Fig. 2.a 5 EVD4 EVDCNV00E0 EEV driver 4 NET OPEN CLOSE Descripion of he erminals 6 GND VREF S3 S4 DI1 DI2 GND Tx/Rx G G0 VBAT Power Supply E X V connecion A COM A NO A Relay A aa EVD evoluion Fig. 2.c (*) in combinaion wih Alco EX7 or EX8 valves, use a 35 VA ransformer (code TRADRFE240) GND V REF Analog Digial Inpu Fig. 2.b S3 S4 DI1 DI2 GND Nework Terminal Descripion G, G0 Power supply VBAT Emergency power supply Funcional earh 1,3,2,4 Sepper moor power supply COM1, NO1 Alarm relay GND Earh for he signals VREF Power o acive probes Probe 1 (pressure) or 4 o 20 ma exernal signal Probe 2 (emperaure) or 0 o 10 V exernal signal S3 Probe 3 (pressure) S4 Probe 4 (emperaure) DI1 Digial inpu 1 DI2 Digial inpu 2 Terminal for LAN, plan, RS485, Modbus connecion Terminal for LAN, plan, RS485, Modbus connecion Terminal for plan, RS485, Modbus connecion aa service serial por (remove he cover o access ) b serial por Tab. 2.a Tx/Rx b 1 green 2 yellow 3 brown 4 whie 5 personal compuer for configuraion 6 USB/LAN converer 7 adaper 8 raiomeric pressure ransducer - evaporaion pressure 9 NTC sucion emperaure 10 digial inpu 1 configured o enable conrol 11 free conac (up o 230 Vac) 12 solenoid valve 13 alarm signal Noe: connec he valve cable shield o he elecrical panel earh; he use of he driver for he superhea conrol requires he use of he evaporaion pressure probe and he sucion emperaure probe, which will be fied afer he evaporaor, and digial inpu 1/2 o enable conrol. As an alernaive o digial inpu 1/2, conrol can be enabled via remoe signal (LAN, plan, RS485). For he posiioning of he probes relaing o oher applicaions, see he chaper on Conrol ; inpus, are programmable and he connecion o he erminals depends on he seing of he parameers. See he chapers on Commissioning and Funcions ; pressure probe in he diagram is raiomeric. See he general connecion diagram for he oher elecronic probes, 4 o 20 ma or combined; four probes are needed for superhea conrol wih BLDC compressors, wo o measure he superhea and wo o measure he discharge superhea and he discharge emperaure. See chap. 5. 9

10 ENG 2.4 Insallaion For insallaion proceed as follows, wih reference o he wiring diagrams: 1. connec he probes: he probes can be insalled a maximum disance of 10 meres away from he driver, or a maximum of 30 meres as long as shielded cables wih a minimum cross-secion of 1 mm² are used; 2. connec any digial inpus, maximum lengh 30 m; 3. connec he power cable o he valve moors: use 4-wire shielded cable AWG 22 Lmax=10 m or AWG 14 Lmax=50m; failure o connec he valve moors afer connecing he driver will generae he EEV moor error alarm: see paragraph 9.5; 4. carefully evaluae he maximum capaciy of he relay oupu specified in he chaper Technical specificaions ; 5. if necessary use a class 2 safey ransformer, suiably proeced agains shor-circuis and volage surges. For he power raings see he general connecion diagram and he echnical specificaions. 6. he minimum size of he connecion cables mus be 0.5 mm 2 7. power up he driver in he even of 24 Vdc power supply he drive will close he valve. Imporan: in he even of 24 Vdc power supply se he Power supply mode parameer=1 o sar conrol. See par program he driver, if necessary: see he chaper User inerface ; 9. connec he serial nework, if feaured: follow o he diagrams below for he earh connecion. Drivers in a serial nework Case 1: muliple drivers conneced in a nework powered by he same ransformer. Typical applicaion for a series of drivers inside he same elecrical panel. 230 Vac 24 Vac 2 AT G G0 VBAT COMA NOA 2 AT G G0 VBAT Fig. 2.d Case 2: muliple drivers conneced in a nework powered by differen ransformers (G0 no conneced o earh). Typical applicaion for a series of drivers in differen elecrical panels. 230 Vac 24 Vac 2 AT G G0 VBAT 230 Vac COMA NOA 24 Vac 2 AT G G0 VBAT 230 Vac Fig. 2.e Case 3: muliple drivers conneced in a nework powered by differen ransformers wih jus one earh poin. Typical applicaion for a series of drivers in differen elecrical panels. COMA NOA COMA NOA 2 AT 24 Vac 2 AT G G0 VBAT G G0 VBAT COMA NOA COMA NOA pco pco G G0 VBAT COMA NOA G G0 VBAT COMA NOA G G0 VBAT COMA NOA Vac 24 Vac 230 Vac 24 Vac 230 Vac 24 Vac Imporan: earhing G0 and G on a driver conneced o a serial nework will cause permanen damage o he driver. 230 Vac 2 AT 24 Vac G G0 VBAT 230 Vac pco Insallaion environmen Fig. 2.g COMA NOA 2 AT 24 Vac G G0 VBAT NO! Imporan: avoid insalling he driver in environmens wih he following characerisics: relaive humidiy greaer han he 90% or condensing; srong vibraions or knocks; exposure o coninuous waer sprays; exposure o aggressive and polluing amospheres (e.g.: sulphur and ammonia fumes, saline mis, smoke) o avoid corrosion and/or oxidaion; srong magneic and/or radio frequency inerference (avoid insalling he appliances near ransmiing anennae); exposure of he driver o direc sunligh and o he elemens in general. Imporan: When connecing he driver, he following warnings mus be observed: if he driver is used in a way no specified in his manual, he level of proecion is no guaraneed. incorrec connecion o he power supply may seriously damage he driver; use cable ends suiable for he corresponding erminals. Loosen each screw and inser he cable ends, hen ighen he screws and lighly ug he cables o check correc ighness; separae as much as possible (a leas 3 cm) he probe and digial inpu cables from he power cables o he loads so as o avoid possible elecromagneic disurbance. Never lay power cables and probe cables in he same conduis (including hose in he elecrical panels); insall he shielded valve moor cables in he probe conduis: use shielded valve moor cables o avoid elecromagneic disurbance o he probe cables; avoid insalling he probe cables in he immediae viciniy of power devices (conacors, circui breakers, ec.). Reduce he pah of he probe cables as much as possible and avoid enclosing power devices; avoid powering he driver direcly from he main power supply in he panel if his supplies differen devices, such as conacors, solenoid valves, ec., which will require a separae ransformer; * EVD EVO is a conrol o be incorporaed in he end equipmen, do no use for flush moun * DIN VDE 0100: Proecive separaion beween SELV circui and oher circuis mus be guaraneed. The requiremens according o DIN VDE 0100 mus be fulfilled. To preven infringemen of he proecive separaion (beween SELV circui o oher circuis) an addiional fixing has o be provided near o he erminals. This addiional fixing shall clamp he insulaion and no he conducor COMA NOA 2 AT 2 AT 2 AT pco Fig. 2.f 10

11 EVD4 service USB adaper - ENG 2.5 Valve operaion in parallel and complemenary mode EVD evoluion can conrol wo CAREL valves conneced ogeher (see paragraph 4.2), in parallel mode, wih idenical behaviour, or in complemenary mode, whereby if one valve opens, he oher closes by he same percenage. To achieve such behaviour, simply se he valve parameer ( Two EXV conneced ogeher ) and connec he valve moor power supply wires o he same connecor. In he example shown below, for operaion of valve B_2 wih valve B_1 in complemenary mode simply swap he connecion of wires 1 and 3. 2 CAREL valves conneced in parallel mode 2 CAREL valves conneced in complemenary mode 2.7 Connecing he module EVBAT00400 The EVBAT00400 module can close he valve in he even of power failures. Digial inpu 1/2 can be configured o deec he Discharged baery alarm. G G0 VBAT EVD Baery module EVBAT AT GND BAT ERR EVD4 PC + 4 EVBAT00500 CAREL E X V VALVE A_ CAREL E X V VALVE B_ G G0 VBAT EVD evoluion CAREL E X V VALVE A_ Fig. 2.h CAREL E X V VALVE B_ Noe: operaion in parallel and complemenary mode can only be used for CAREL valves, wihin he limis shown in he able below, where OK means ha he valve can be used wih all refrigerans a he raed operaing pressure. Two EXVs conneced ogeher CAREL valve model E2V* E3V* E4V* E5V* E6V* E7V* OK E3V45, E4V85, NO NO NO MOPD = 35 bars MOPD = 22 bars E3V55, E4V95, MOPD = 26 bars MOPD = 15 bars E3V65, MOPD = 20 bars 230 Vac 35 VA TRADRFE Vac 2 AT Fig. 2.j GND DI1 DI2 2.8 Connecing he USB-LAN converer Procedure: remove he LED board cover by pressing on he fasening poins; plug he adaper ino he service serial por; connec he adaper o he converer and hen his in urn o he compuer. power up he driver. press EVD evoluion OPEN CLOSE Noe: MOPD = Maximum Operaing-Pressure Differenial 2.6 Shared pressure probe Only 4 o 20 ma pressure probes (no raiomeric) can be shared. The probe can be shared by a maximum of 5 drivers. For muliplexed sysems where conrollers EVD evoluion1 o EVD evoluion5 share he same pressure probe, choose he normal opion for EVD evoluion1 and he remoe opion for he oher drivers, up o he fifh. EVD evoluion6 mus use anoher pressure probe P2. EXAMPLE EVD Evoluion1 o EVD Evoluion5 EVD Evoluion6 Probe -0.5 o 7 barg (P1) o remoe, -0.5 o 7 barg -0.5 o 7 barg (P2) 4 1 EVDCNV00E0 2 3 press Fig. 2.k G G0 VBAT NET OPEN CLOSE COMA NOA GND VREF S3 S4 DI1 DI2 GND Tx/Rx EVD Evoluion 1 EVD Evoluion 5 EVD Evoluion 6 GND VREF S3 S4 DI1 DI2 GND Tx/Rx GND VREF S3 S4 DI1 DI2 GND Tx/Rx P1 P2 GND VREF S3 S4 DI1 DI2 GND Tx/Rx 1 service serial por 2 adaper 3 USB/LAN converer 4 personal compuer Fig. 2.l Fig. 2.i P1 Shared pressure probe P2 Pressure probe Noe: when using he service serial por connecion, he VPM program can be used o configure he driver and updae he driver and display firmware, downloadable from hp://ksa.carel.com. See he appendix. 11

12 2.9 Connecing he USB/RS485 converer Only on EVD evoluion RS485/Modbus models can he configuraion compuer be conneced using he USB/RS485 converer and he serial por, according o he following diagram. G G0 VBAT COMA NOA NET OPEN CLOSE 1 EVD evoluion Analog - Digial Inpu Nework GND VREF S3 S4 DI1 DI2 GND Tx/Rx 2 shield Fig. 2.m 1 personal compuer for configuraion 2 USB/RS485 converer Noe: he serial por can be used for configuraion wih he VPM program and for updaing he driver firmware, downloadable from hp://ksa.carel. com; o save ime, up o 8 EVD evoluion drivers can be conneced o he compuer, updaing he firmware a he same ime (each driver mus have a differen nework address) Upload, Download and Rese parameers (display) Procedure: 10. press he Help and Ener buons ogeher for 5 seconds; 11. a muliple choice menu will be displayed, use UP/DOWN o selec he required procedure; 12. confirm by pressing ENTER; 13. he display will promp for confirmaion, press ENTER; 14. a he end a message will be shown o noify he operaion if he operaion was successful. UPLOAD: he display saves all he values of he parameers on he source driver; DOWNLOAD: he display copies all he values of he parameers o he arge driver; RESET: all he parameers on he driver are resored o he defaul values. See he able of parameers in chaper 8. Fig. 2.n Imporan: he procedure mus be carried ou wih driver powered; DO NOT remove he display from he driver during he UPLOAD, DOWNLOAD, RESET procedure; he parameers canno be downloaded if he source driver and he arge driver have incompaible firmware Show elecrical connecions (display) To display he probe and valve elecrical connecions for drivers A and B, ener display mode. See paragraph

13 EVD4 service USB adaper PC ENG 2.12 General connecion diagram CASE 1: 230 Vac power supply wih emergency module CASE 3: 24 Vdc power supply G G0 VBAT EVD ULTRACAP EVD0000UC0 2 AT CAREL E X V H G G0 VBAT COMA NOA Sporlan SEI / SEH / SER DANFOSS ETS ALCO EX5/6 EX7/ G G0 230 Vac A 35 VA TRADRFE Vac 2 AT G G0 VBAT wih baery G G0 VBAT shield COMA NOA 11 S CASE 2: 230 Vac power supply wihou emergency module 230 Vac 5 20 VA (*) 24 Vac 2 AT EVD4 G G0 EVDCNV00E0 EEV driver wihou baery EVD evoluion GND VREF S3 S4 DI1 DI2 GND Tx/Rx GND Tx/Rx GND GND EVD0000E0*: LAN version EVD0000E1*: plan version EVD0000E2*: RS485 version shield shield shield Modbus RS485 pco pco pco CVSTDUM0R B GND VREF S3 S4 DI1 DI2 GND Tx/Rx C GND VREF S3 S4 DI1 DI2 GND Tx/Rx 3 4 D E GND Tx/Rx F GND Tx/Rx G GND VREF S3 S4 DI1 DI2 GND VREF S3 S4 DI1 DI2 GND VREF S3 S4 DI1 DI2 GND Tx/Rx Fig. 2.o 1 green 10 digial inpu 1 configured o enable 2 yellow conrol 3 brown 11 free conac (up o 230 Vac) 4 whie 12 solenoid valve 5 configuraion compuer 13 alarm signal 6 USB/LAN converer 14 red 7 adaper 15 black 8 raiomeric pressure 16 blue 9 ransducer NTC probe 17 configuraion/supervision compuer Noe: for he configuraion of he digial inpus see par (*): in combinaion wih Alco EX7 or EX8 valves, use a 35 VA ransformer code TRADRFE240. A Connecion o EVD0000UC0 B Connecion o elecronic pressure probe (SPK**0000) or piezoresisive pressure ransducer (SPKT00**C0) C Connecion as posiioner (0 o 10 Vdc inpu) D Connecion as posiioner (4 o 20 ma inpu) E Connecion o combined pressure/emperaure probe (SPKP00**T0) F Connecion o backup probes (S3, S4) G Raiomeric pressure ransducer connecions (SPKT00**R0) H Connecions o oher ypes of valves The maximum lengh of he connecion cable o he EVD0000UC0 1 module is 5 m. The connecion cable o he valve moor mus be 4-wire shielded, 2 AWG 22 wih Lmax= 10 m, AWG 14 con Lmax= 50 m 13

14 3. USER INTERFACE The user inerface consiss of 5 LEDs ha display he operaing saus, as shown in he able: EVD evoluion 3.2 Display and keypad The graphic display shows 2 sysem variables, he conrol saus of he driver, he acivaion of he proecors, any alarms and he saus of he relay oupu Surriscaldam. 4.9 K Aperura valvola 44 % T ON MOP ALARM -- Rele Fig. 3.a LED ON OFF Flashing NET Connecion available No connecion Communicaion error OPEN Opening valve - Driver disabled (*) CLOSE Closing valve - Driver disabled (*) Acive alarm - - Driver powered Driver no powered Wrong power supply (see chap. Alarms) Tab. 3.a (*) Awaiing compleion of he iniial configuraion 3.1 Assembling he display board (accessory) The display board, once insalled, is used o perform all he configuraion and programming operaions on he driver. I displays he operaing saus, he significan values for he ype of conrol ha he driver is performing (e.g. superhea conrol), he alarms, he saus of he digial inpus and he relay oupu. Finally, i can save he configuraion parameers for one driver and ransfer hem o a second driver (see he procedure for upload and download parameers). For insallaion: remove he cover, pressing on he fasening poins; fi he display board, as shown; he display will come on, and if he driver is being commissioned, he guided configuraion procedure will sar. press press Fig. 3.b Imporan: he driver is no acivaed if he configuraion procedure has no been compleed. The fron panel now holds he display and he keypad, made up of 6 buons ha, pressed alone or in combinaion, are used o perform all he configuraion and programming operaions on he driver. 1 1s variable displayed 2 2nd variable displayed 3 relay saus 4 alarm (press HELP ) 5 proecor acivaed 6 conrol saus 7 adapive conrol in progress Fig. 3.c Display wriings Conrol saus Proecion acive ON Operaion LowSH Low superhea OFF Sandby LOP Low evaporaion emperaure POS Posiioning MOP High evaporaion emperaure WAIT Wai High Tcond High condensing emperaure CLOSE Closing INIT Valve moor error recogniion procedure (*) TUN Tuning in progress Tab. 3.b (*) The valve moor error recogniion procedure can be disabled. See paragraph 9.5 Keypad Buon Funcion Prg opens he screen for enering he password o access programming mode. if in alarm saus, displays he alarm queue; in he Manufacurer level, when scrolling he parameers, shows he explanaion screens (Help). Esc exis he Programming (Service/Manufacurer) and Display modes; afer seing a parameer, exis wihou saving he changes. navigaes he display screens; increases/decreases he value. UP/ DOWN swiches from he display o parameer programming mode; confirms he value and reurns o he lis of parameers. Ener Tab. 3.c Noe: he variables displayed as sandard can be seleced by configuring he parameers Display main var. 1 and Display main var. 2 accordingly. See he lis of parameers. 14

15 3.3 Display mode (display) Display mode is used o display he useful variables showing he operaion of he sysem. The variables displayed depend on he ype of conrol seleced. 1. press Esc one or more imes o swich o he sandard display; 2. press UP/DOWN: he display shows a graph of he superhea, he percenage of valve opening, he evaporaion pressure and emperaure and he sucion emperaure variables; 3. press UP/DOWN: he variables are shown on he display, followed by he screens wih he probe and valve moor elecrical connecions; 4. press Esc o exi display mode. For he complee lis of he variables shown on he display, see he chaper: Table of parameers. Fig. 3.d 3.4 Programming mode (display) The parameers can be modified using he fron keypad. Access differs according o he user level: Service (Insaller) and manufacurer. Modifying he Service parameers IThe Service parameers, as well as he parameers for commissioning he driver, also include hose for he configuraion of he inpus, he relay oupu, he superhea se poin or he ype of conrol in general, and he proecion hresholds. See he able of parameers. Procedure: 1. press Esc one or more imes o swich o he sandard display; 2. press Prg: he display shows a screen wih he PASSWORD reques; 3. press ENTER and ener he password for he Service level: 22, saring from he righ-mos figure and confirming each figure wih ENTER; 4. if he value enered is correc, he firs modifiable parameer is displayed, nework address; 5. press UP/DOWN o selec he parameer o be se; 6. press ENTER o move o he value of he parameer; 7. press UP/DOWN o modify he value; 8. press ENTER o save he new value of he parameer; 9. repea seps 5, 6, 7, 8 o modify he oher parameers; 10. press Esc o exi he procedure for modifying he Service parameers. Modifying he Manufacurer parameers The Manufacurer level is used o configure all he driver parameers, and consequenly, in addiion o he Service parameers, he parameers relaing o alarm managemen, he probes and he configuraion of he valve. See he able of parameers. Procedure: 1. press Esc one or more imes o swich o he sandard display; 2. press Prg: he display shows a screen wih he PASSWORD reques; 3. press ENTER and ener he Manufacurer level password: 66, saring from he righ-mos figure and confirming each figure wih ENTER; 4. if he value enered is correc, he lis of parameer caegories is shown: - Configuraion - Probes - Conrol - Special - Alarm configuraion - Valve 5. press he UP/DOWN buons o selec he caegory and ENTER o access he firs parameer in he caegory; 6. press UP/DOWN o selec he parameer o be se and ENTER o move o he value of he parameer; 7. press UP/DOWN o modify he value; 8. press ENTER o save he new value of he parameer; 9. repea seps 6, 7, 8 o modify he oher parameers; 10. press Esc o exi he procedure for modifying he Manufacurer parameers. Fig. 3.f Noe: all he driver parameers can be modified by enering he Manufacurer level; if when seing a parameer he value enered is ou-of-range, his is no acceped and he parameer soon afer reurns o he previous value; if no buon is pressed, afer 5 min he display auomaically reurns o he sandard mode. Fig. 3.e Noe: if when seing a parameer he value enered is ou-of-range, his is no acceped and he parameer soon afer reurns o he previous value; if no buon is pressed, afer 5 min he display auomaically reurns o he sandard mode; o se a negaive value move o he lef-mos digi and press Up/Down. 15

16 ENG 4. COMMISSIONING 4.1 Commissioning Once he elecrical connecions have been compleed (see he chaper on insallaion) and he power supply has been conneced, he operaions required for commissioning he driver depend on he ype of inerface used, however essenially involve seing jus 4 parameers: refrigeran, valve, ype of pressure probe and ype of main conrol. Types of inerfaces: DISPLAY: afer having correcly configured he seup parameers, confirmaion will be requesed. Only afer confirmaion will he driver be enabled for operaion, he main screen will be shown on he display and conrol will be able o commence when requesed by he pco conroller via LAN or when digial inpu DI1/DI2 closes. See paragraph 4.2; VPM: o enable conrol of he driver via VPM, se Enable EVD conrol o 1; his is included in he safey parameers, in he special parameers menu, under he corresponding access level. However, he seup parameers should firs be se in he relaed menu. The driver will hen be enabled for operaion and conrol will be able o commence when requesed by he pco conroller via LAN or when digial inpu DI1/ DI2 closes. If due o error or for any oher reason Enable EVD conrol should be se o 0 (zero), he driver will immediaely sop conrol and will remain in sandby unil re-enabled, wih he valve sopped in he las posiion; SUPERVISOR: o simplify he commissioning of a considerable number of drivers using he supervisor, he seup operaion on he display can be limied o simply seing he nework address. The display will hen be able o be removed and he configuraion procedure posponed o a laer sage using he supervisor or, if necessary, reconnecing he display. To enable conrol of he driver via supervisor, se Enable EVD conrol ; his is included in he safey parameers, in he special parameers menu, under he corresponding access level. However, he seup parameers should firs be se in he relaed menu. The driver will hen be enabled for operaion and conrol will be able o commence when requesed by he pco conroller via plan or when digial inpu DI1/DI2 closes. As highlighed on he supervisor, inside of he yellow informaion field relaing o he Enable EVD conrol parameer, if due o error or for any oher reason Enable EVD conrol should be se o 0 (zero), he driver will immediaely sop conrol and will remain in sandby unil re-enabled, wih he valve sopped in he las posiion; pco PROGRAMMABLE CONTROLLER: he firs operaion o be performed, if necessary, is o se he nework address using he display. If a plan, LAN or Modbus driver is used, conneced o a pco family conroller, he seup parameers will no need o be se and confirmed. In fac, he applicaion running on he pco will manage he correc values based on he uni conrolled. Consequenly, simply se he plan, LAN or Modbus address for he driver as required by he applicaion on he pco, and afer a few seconds communicaion will commence beween he wo insrumens and he driver auomaically be enabled for conrol. The main screen will shown on he display, which can hen be removed, and conrol will be able o commence when requesed by he pco conroller or digial inpu DI1/DI2. If here is no communicaion beween he pco and he driver (see he paragraph LAN error alarm ), he driver will be able o coninue conrol based on he saus of digial inpu DI1/DI2. See par Guided commissioning procedure (display) Afer having fied he display: he firs parameer is displayed: nework address; press Ener o move o he value of he parameer press UP/DOWN o modify he value press Ener o confirm he value press UP/DOWN o move o he nex parameer, refrigeran repea seps 2, 3, 4, 5 o modify he values of he parameers: refrigeran, valve, pressure probe, main regulaion; GND VREF S3 S4 whie black green DI1 DI2 GND TxRx TEMP PRESS check ha he elecrical connecions are correc; G G0 VBAT green brown yellow whie COM1 NO1 if he configuraion is correc exi he procedure, oherwise choose NO and reurn o sep 2; A he end of he configuraion procedure he conroller acivaes he valve moor error recogniion procedure, showing INIT on he display. See paragraph 9.5 To simplify commissioning and avoid possible malfuncions, he driver will no sar unil he following have been configured: 1. nework address; 2. refrigeran; 3. valve; 4. pressure probe ; 5. ype of main conrol, ha is, he ype of uni he superhea conrol is applied o. Noe: o exi he guided commissioning procedure press he DOWN buon repeaedly and finally confirm ha configuraion has been compleed. The guided procedure CANNOT be ended by pressing Esc; if he configuraion procedure ends wih a configuraion error, access Service parameer programming mode and modify he value of he parameer in quesion; if he valve and/or he pressure probe used are no available in he lis, selec any model and end he procedure. Then he driver will be enabled for conrol, and i will be possible o ener Manufacurer programming mode and se he corresponding parameers manually. Imporan: for 24 Vdc power supply, a he end of he guided commissioning procedure, o sar conrol se Power supply mode parameer=1, oherwise he valve remains in he closed posiion. See paragraph

17 Nework address The nework address assigns o he driver an address for he serial connecion o a supervisory sysem via RS485, and o a pco conroller via plan, LAN, Modbus. Parameer/descripion Def. Min. Max. UOM CONFIGURATION Nework address Tab. 4.d For nework connecion of he RS485/Modbus models he communicaion speed also needs o be se, in bis per second, using he parameer Nework seings. See paragraph 6.1. Refrigeran The ype of refrigeran is essenial for calculaing he superhea. In addiion, i is used o calculae he evaporaion and condensing emperaure based on he reading of he pressure probe. Parameer/descripion Def. CONFIGURATION Refrigeran: 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; 21=R245Fa; 22=R407F; 23=R32; 24=HTR01 ; 25=HTR02 Tab. 4.e Noe: for CO 2 cascade sysems, a he end of he commissioning procedure also se he auxiliary refrigeran. See he following paragraph. Valve Seing he ype of valve auomaically defines all he conrol parameers based on he manufacurer s daa for each model. In Manufacurer programming mode, he conrol parameers can hen be fully cusomised if he valve used is no in he sandard lis. In his case, he driver will deec he modificaion and indicae he ype of valve as Cusomised. Parameer/descripion CONFIGURATION Valve: 1= CAREL E X V; 2= Alco EX4; 3= Alco EX5; 4= Alco EX6; 5= Alco EX7; 6= Alco EX8 330Hz suggesed by CAREL; 7= Alco EX8 500Hz specified by Alco; 8= Sporlan SEI ; 9= Sporlan SER ; 10= Sporlan SEI 30; 11= Sporlan SEI 50; 12= Sporlan SEH 100; 13= Sporlan SEH 175; 14= Danfoss ETS B; 15= Danfoss ETS 50B; 16= Danfoss ETS 100B; 17= Danfoss ETS 250; 18= Danfoss ETS 400; 19= wo CAREL E x V conneced ogeher 20= Sporlan Ser(I)G, J, K.; 21= Danfoss CCM ; 22= Danfoss CCM 40 Def. CAREL E X V Tab. 4.f Imporan: wo CAREL E X V valves conneced ogeher mus be seleced if wo CAREL E X V valves are conneced o he same erminal, o have parallel or complemenary operaion; as described, conrol is only possible wih CAREL E X V valves; no all CAREL valves can be conneced: see paragraph 2.5. Parameer/descripion CONFIGURATION Sensor Raiomeric (OUT=0 o 5V) Elecronic (OUT=4 o 20mA) 1= -1 o 4.2 barg 8= -0.5 o 7 barg 2=-0.4 o 9.3 barg 9= 0 o 10 barg 3= -1 o 9.3 barg 10= 0 o 18,2 barg 4= 0 o 17.3 barg 11= 0 o 25 barg 5= 0.85 o 34.2 barg 12= 0 o 30 barg 6= 0 o 34.5 barg 13= 0 o 44.8 barg 7= 0 o 45 barg 14= remoe, -0.5 o 7 barg 15= remoe, 0 o 10 barg 16= remoe, 0 o 18,2 barg 17= remoe, 0 o 25 barg 18= remoe, 0 o 30 barg 19= remoe, 0 o 44.8 barg 20= exernal signal (4 o 20 ma) 21= -1 o 12.8 barg 22= 0 o 20.7 barg 23= 1.86 o 43.0 barg Def. Raiom.: -1 o 9.3 barg Tab. 4.g Imporan: in case wo pressure probes are insalled and S3, hey mus be of he same ype. I is no allowed o use a raiomeric probe and an elecronic one. Noe: in he case of muliplexed sysems where he same pressure probe is shared beween muliple drivers, choose he normal opion for he firs driver and he remoe opion for he remaining drivers. The same pressure ransducer can be shared beween a maximum of 5 drivers. Example: o use he same pressure probe, -0.5 o 7 bars, for 3 drivers For he firs driver, selec: -0.5 o 7 barg For he second and hird driver selec: remoe -0.5 o 7 barg. See paragraph 2.6 Noe: he range of measuremen by defaul is always in bar gauge (barg).in he manufacurer menu, he parameers corresponding o he range of measuremen and he alarms can be cusomised if he probe used is no in he sandard lis. If modifying he range of measuremen, he driver will deec he modificaion and indicae he ype of probe as Cusomised. The sofware on he driver akes ino consideraion he uni of measure. If a range of measuremen is seleced and hen he uni of measure is changed (from bars o psi), he driver auomaically updaes in limis of he range of measuremen and he alarm limis.by defaul, he main conrol probe is se as CAREL NTC. Oher ypes of probes can be seleced in he service menu. Unlike he pressure probes, he emperaure probes do no have any modifiable parameers relaing o he range of measuremen, and consequenly only he models indicaed in he lis can be used (see he chaper on Funcions and he lis of parameers). In any case, in manufacurer programming mode, he limis for he probe alarm signal can be cusomised. Pressure probe Seing he ype of pressure probe defines he range of measuremen and he alarm limis based on he manufacurer s daa for each model, usually indicaed on he raing plae on he probe. 17

18 Main conrol Seing he main conrol defines he operaing mode of he driver. Parameer/descripion Def. CONFIGURATION Main conrol muliplexed Superhea conrol cabine/cold 1= muliplexed cabine/cold room room 2= cabine/cold room wih on-board compressor 3= perurbed cabine/cold room 4= cabine/cold room wih subcriical CO 2 5= R404A condenser for subcriical CO 2 6= air-condiioner/chiller wih plae hea exchanger 7= air-condiioner/chiller wih ube bundle hea exchanger 8= air-condiioner/chiller wih finned coil hea exchanger 9= air-condiioner/chiller wih variable cooling capaciy 10= perurbed air-condiioner/chiller Advanced conrol 11= EPR back pressure 12= ho gas bypass by pressure 13= ho gas bypass by emperaure 14= ranscriical CO 2 gas cooler 15= analogue posiioner (4 o 20 ma) 16= analogue posiioner (0 o 10 V) 17= air-condiioner/chiller or cabine/cold room wih adapive conrol 18= air-condiioner/chiller wih digial scroll compressor 19= AC/chiller wih BLDC scroll compressor(*) 20= superhea conrol wih 2 emperaure probes 21= I/O expansion for pco Tab. 4.h (*) CAREL valve drivers only 4.4 Checks afer commissioning Afer commissioning: check ha he valve complees a full closing cycle o perform alignmen; se, if necessary, in Service or Manufacurer programming mode, he superhea se poin (oherwise keep he value recommended by CAREL based on he applicaion) and he proecion hresholds (LOP, MOP, ec.). See he chaper on Proecors. 4.5 Oher funcions By enering Service programming mode, oher ypes of main conrol can be seleced (ranscriical CO 2, ho gas bypass, ec.), as well as socalled advanced conrol funcions, which do no involve he superhea, acivaing auxiliary conrols ha use probes S3 and/or S4 and seing he suiable values for he conrol se poin and he LowSH, LOP and MOP proecion hresholds (see he chaper on Proecors ), which depend on he specific characerisics of he uni conrolled. By enering Manufacurer programming mode, finally, he operaion of he driver can be compleely cusomised, seing he funcion of each parameer. If he parameers corresponding o PID conrol are modified, he driver will deec he modificaion and indicae he main conrol as Cusomised. The superhea se poin and all he parameers corresponding o PID conrol, he operaion of he proecors and he meaning and use of probes and/or will be auomaically se o he values recommended by CAREL based on he seleced applicaion. During his iniial configuraion phase, only superhea conrol mode from 1 o 10 can be se, which differ based on he applicaion (chiller, refrigeraed cabine, ec.). In he even of errors in he iniial configuraion, hese parameers can laer be accessed and modified inside he service or manufacurer menu. If he driver defaul parameers are resored (RESET procedure, see he chaper on Insallaion), when nex sared he display will again show he guided commissioning procedure. 4.3 Auxiliary refrigeran In he even of cascade sysems comprising a main circui and a secondary circui, he auxiliary refrigeran is he refrigeran in he secondary circui. See he paragraphs Auxiliary conrol and Reverse high condensing emperaure proecion (HiTcond) on S3. The defaul value 0 ses he same refrigeran as in he main circui. Parameer/descripion Configuraion Def. Min Max UOM Auxiliary refrigeran 0 = same as main circui; 1=R22 ; 2=R134a; 3=R404A; 4=R407C; 5=R410A; 6=R507A; 7=R290; 8=R600; 9=R600a; 10=R717; 11=R744; 12=R728; 13=R1270; 14=R417A; 15=R422D; 16=R413A; 17=R422A; 18=R423A; 19=R407A; 20=R427A; 21=R245FA; 22=R407F; 23=R32; 24=HTR01 ; 25=HTR Tab. 4.i 18

19 5. CONTROL 5.1 Main and auxiliary conrol EVD evoluion feaures wo ypes of conrol main; auxiliary. Main conrol is always acive, while auxiliary conrol can be acivaed by parameer. Main conrol defines he operaing mode of he driver. The firs 10 seings refer o superhea conrol, he ohers are so-called special seings and are pressure or emperaure seings or depend on a conrol signal from an exernal conroller. The las advanced funcions (18, 19, 20) also relae o superhea conrol. Parameer/descripion Def. CONFIGURATION Main conrol muliplexed Superhea conrol cabine/ 1= muliplexed cabine/cold room cold room 2= cabine/cold room wih on-board compressor 3= perurbed cabine/cold room 4= cabine/cold room wih subcriical CO 2 5= R404A condenser for subcriical CO 2 6= air-condiioner/chiller wih plae hea exchanger 7= air-condiioner/chiller wih ube bundle hea exchanger 8= air-condiioner/chiller wih finned coil hea exchanger 9= air-condiioner/chiller wih variable cooling capaciy 10= perurbed air-condiioner/chiller Advanced conrol 11= EPR back pressure 12= ho gas bypass by pressure 13= ho gas bypass by emperaure 14= gas cooler CO 2 ranscriical 15= analogue posiioner (4 o 20 ma) 16= analogue posiioner (0 o 10 V) 17= air-condiioner/chiller or cabine/ cold room wih adapive conrol 18= air-condiioner/chiller wih digial scroll compressor 19= AC/chiller wih BLDC scroll compressor(*) 20= superhea conrol wih 2 emperaure probes 21= I/O expansion for pco Tab. 5.a (*) only for CAREL valve drivers Noe: R404A condensers wih subcriical CO 2 refer o superhea conrol for valves insalled in cascading sysems where he flow of R404A (or oher refrigeran) in an exchanger acing as he CO 2 condenser needs o be conrolled; perurbaed cabine/cold room or air-condiioner/chiller refer o unis ha momenarily or permanenly operae wih swinging condensing or evaporaion pressure. Auxiliary conrol feaures he following seings: Parameer/descripion CONFIGURATION Auxiliary conrol 1=Disabled 2=High condensing emperaure proecion on S3 probe 3=Modulaing hermosa on S4 probe 4=Backup probes on S3 & S4 5=Reserved 6=Reserved 7=Reserved 8=Subcooling measuremen 9=Reverse high condensing emp. proecion on S3 Def. Disabled Tab. 5.b 5.2 Superhea conrol The primary purpose of he elecronic valve is ensure ha he flow-rae of refrigeran ha flows hrough he nozzle corresponds o he flow-rae required by he compressor. In his way, he evaporaion process will ake place along he enire lengh of he evaporaor and here will be no liquid a he oule and consequenly in he branch ha runs o he compressor. As liquid is no compressible, i may cause damage o he compressor and even breakage if he quaniy is considerable and he siuaion lass some ime. Superhea conrol The parameer ha he conrol of he elecronic valve is based on is he superhea emperaure, which effecively ells wheher or no here is liquid a he end of he evaporaor. The superhea emperaure is calculaed as he difference beween: superheaed gas emperaure (measured by a emperaure probe locaed a he end of he evaporaor) and he sauraed evaporaion emperaure (calculaed based on he reading of a pressure ransducer locaed a he end of he evaporaor and using he Tsa(P) conversion curve for each refrigeran). Superhea= Superheaed gas emperaure(*) Sauraed evaporaion emperaure (*) sucion If he superhea emperaure is high i means ha he evaporaion process is compleed well before he end of he evaporaor, and herefore flow-rae of refrigeran hrough he valve is insufficien. This causes a reducion in cooling efficiency due o he failure o exploi par of he evaporaor. The valve mus herefore be opened furher. Vice-versa, if he superhea emperaure is low i means ha he evaporaion process has no concluded a he end of he evaporaor and a cerain quaniy of liquid will sill be presen a he inle o he compressor. The valve mus herefore be closed furher. The operaing range of he superhea emperaure is limied a he lower end: if he flow-rae hrough he valve is excessive he superhea measured will be near 0 K. This indicaes he presence of liquid, even if he percenage of his relaive o he gas canno be quanified. There is herefore un undeermined risk o he compressor ha mus be avoided. Moreover, a high superhea emperaure as menioned corresponds o an insufficien flow-rae of refrigeran. The superhea emperaure mus herefore always be greaer han 0 K and have a minimum sable value allowed by he valve-uni sysem. A low superhea emperaure in fac corresponds o a siuaion of probable insabiliy due o he urbulen evaporaion process approaching he measuremen poin of he probes. The expansion valve mus herefore be conrolled wih exreme precision and a reacion capaciy around he superhea se poin, which will almos always vary from 3 o 14 K. Se poin values ouside of his range are quie infrequen and relae o special applicaions. F S L C EVD evoluion CP Imporan: he High condensing emperaure proecion and Modulaing hermosa auxiliary seings can only be enabled if he main conrol is also superhea conrol wih seings 1 o 10 and 17, 18. On he oher hand, he Backup probes on S3 and S4 auxiliary conrol can be acivaed, once he corresponding probes have been conneced, only for seings from 1 o 18. M V E EEV P T The following paragraphs explain all he ypes of conrol ha can be se on EVD evoluion. Fig. 5.a 19

20 CP compressor EEV elecronic expansion valve C condenser V solenoid valve L liquid receiver E evaporaor F dewaering filer P pressure probe (ransducer) S liquid indicaor T emperaure probe For he wiring, see paragraph 2.7 General connecion diagram. Noe: superhea conrol in a refrigeran circui wih BLDC compressor requires wo probes for superhea conrol and wo probes downsream of he compressor for discharge superhea and discharge emperaure conrol. See par PID parameers Superhea conrol, as for any oher mode ha can be seleced wih he main conrol parameer, is performed using PID conrol, which in is simples form is defined by he law: u()= K e() + 1 e()d + T de() T d i d u() Valve posiion Ti Inegraion ime e() Error Td Derivaive ime K Proporional gain Noe ha regulaion is calculaed as he sum of hree separae conribuions: proporional, inegral and derivaive. he proporional acion opens or closes he valve proporionally o he variaion in he superhea emperaure. Thus he greaer he K (proporional gain) he higher he response speed of he valve. The proporional acion does no consider he superhea se poin, bu raher only reacs o variaions. Therefore if he superhea value does no vary significanly, he valve will essenially remain saionary and he se poin canno be reached; he inegral acion is linked o ime and moves he valve in proporion o he deviaion of he superhea value from he se poin. The greaer he deviaions, he more inense he inegral acion; in addiion, he lower he value of T (inegraion ime), he more inense he acion will be. The inegraion ime, in summary, represens he inensiy of he reacion of he valve, especially when he superhea value is no near he se poin; he derivaive acion is linked o he speed of variaion of he superhea value, ha is, he gradien a which he superhea changes from insan o insan. I ends o reac o any sudden variaions, bringing forward he correcive acion, and is inensiy depends on he value of he ime Td (derivaive ime). Parameer/descripion Def. Min. Max. UOM CONTROL Superhea se poin 11 LowSH:.hold 180 (320) K ( F) PID propor. gain PID inegraion ime s PID derivaive ime s Tab. 5.c See he EEV sysem guide for furher informaion on calibraing PID conrol. Noe: when selecing he ype of main conrol (boh superhea conrol and special modes), he PID conrol values suggesed by CAREL will be auomaically se for each applicaion. Proecor conrol parameers See he chaper on Proecors. Noe ha he proecion hresholds are se by he insaller/manufacurer, while he imes are auomaically se based on he PID conrol values suggesed by CAREL for each applicaion. Parameer/descripion Def. Min. Max. UOM CONTROL LowSH proecion hreshold 5-40 (-72) superh. K( F) se poin. LowSH proecion inegraion s ime LOP proecion hreshold (-76) MOP hreshold C( F) LOP proecion inegraion ime s MOP proecion hreshold 50 LOP hreshold 200 (392) C( F) MOP proecion inegraion ime s ADVANCED High Tcond hreshold (-76) 200 (392) C ( F) High Tcond inegraion ime s Tab. 5.d 5.3 Adapive conrol and auouning EVD evoluion feaures wo funcions used o auomaically opimise he PID parameers for superhea conrol, useful in applicaions where here are frequen variaions in hermal load: 1. auomaic adapive conrol: he funcion coninuously evaluaes he effeciveness of superhea conrol and acivaes one or more opimisaion procedures accordingly; 2. manual auouning: his is acivaed by he user and involves jus one opimisaion procedure. Boh procedures give new values o he PID superhea conrol and proecion funcion parameers: - PID: proporional gain; - PID: inegraion ime; - PID: derivaive ime; - LowSH: low superhea inegraion ime; - LOP: low evaporaion emperaure inegraion ime; - MOP: high evaporaion emperaure inegraion ime; - HiTcond: high condensing emperaure inegraion ime. Given he highly variable dynamics of superhea conrol on differen unis, applicaions and valves, he heories on sabiliy ha adapive conrol and auouning are based on are no always definiive. As a consequence, he following procedure is suggesed, in which each successive sep is performed if he previous has no given a posiive oucome: 1) use he parameers recommended by CAREL o conrol he differen unis based on he values available for he Main conrol parameer; 2) use any parameers esed and calibraed manually based on laboraory or field experiences wih he uni in quesion; 3) enable auomaic adapive conrol; 4) acivae one or more manual auouning procedures wih he uni in sable operaing condiions if adapive conrol generaes he Adapive conrol ineffecive alarm. Adapive conrol Afer having compleed he commissioning procedure, o acivae adapive conrol, se he parameer: Main conrol = air-condiioner/chiller or showcase/cold room wih adapive conrol. Parameer/descripion CONFIGURATION Main conrol... air-condiioner/chiller or cabine/cold room wih adapive conrol Def. muliplexed cabine/cold room Tab. 5.e The acivaion saus of he uning procedure will be shown on he sandard display by he leer T. 20

21 boh he uning procedure and adapive conrol can only be enabled for superhea conrol, hey canno be used for he advanced conrol funcions; For CAREL inernal use only, some uning procedure conrol parameers can be shown on he display, supervisor, pco and VPM; hese mus no be modified by non-exper users. These are: - Tuning mehod - Adapive conrol saus - Las uning resul Wih adapive conrol enabled, he conroller consanly evaluaes wheher conrol is sufficienly sable and reacive; oherwise he procedure for opimising he PID parameers is acivaed. The acivaion saus of he opimisaion funcion is indicaed on he sandard display by he message TUN a he op righ. The PID parameer opimisaion phase involves several operaions on he valve and readings of he conrol variables so as o calculae and validae he PID parameers. These procedures are repeaed o fine-une superhea conrol as much as possible, over a maximum of 12 hours. Tuning mehod is visible as a parameer in he Special caegory, he wo oher parameers are visible in display mode. See paragraph 3.3. Parameer/Descripion Def. Min. Max. UoM ADVANCED Tuning mehod Tab. 5.g Noe: he Tuning mehod parameer is for use by qualified CAREL echnical personnel only and mus no be modified. Noe: during he opimisaion phase mainenance of he superhea se poin is no guaraneed, however he safey of he uni is ensured hrough acivaion of he proecors. If hese are acivaed, he procedure is inerruped; if all he aemps performed over 12 hours are unsuccessful, he adapive conrol ineffecive alarm will be signalled and adapive conrol will be disabled, reseing he defaul values of he PID and proecion funcion parameers; o deacivae he adapive conrol ineffecive alarm se he value of he main conrol parameer o one of he firs 10 opions. If required, adapive conrol can be immediaely re-enabled using he same parameer. If he procedure ends successfully, he resuling conrol parameers will be auomaically saved. Auouning EVD evoluion also feaures an auomaic uning funcion (Auouning) for he superhea and proecor conrol parameers, which can be sared by seing he parameer Force manual uning = 1. Parameer/Descripion Def. Min. Max. UoM ADVANCED Force manual uning 0 = no; 1= yes Tab. 5.f The acivaion saus of he procedure is indicaed on he sandard display by he message TUN a he op righ. 5.4 Conrol wih Emerson Climae Digial Scroll compressor Imporan: his ype of conrol is incompaible wih adapive conrol and auouning. Digial Scroll compressors allow wide modulaion of cooling capaciy by using a solenoid valve o acive a paened refrigeran bypass mechanism. This operaion noneheless causes swings in he pressure of he uni, which may be amplified by normal conrol of he expansion valve, leading o malfuncions. Dedicaed conrol ensures greaer sabiliy and efficiency of he enire uni by conrolling he valve and limiing swings based on he insan compressor modulaion saus. To be able o use his mode, he plan version driver mus be conneced o a Carel pco series conroller running a special applicaion o manage unis wih Digial scroll compressors. Parameer/Descripion CONFIGURATION Main conrol... air-condiioner/chiller wih Digial Scroll compressor Def. muliplexed cabine/cold room Tab. 5.h L C F EVD evoluion CP The opimisaion procedure can only be performed if he driver is in conrol saus, and lass from 10 o 40 minues, performing specific movemens of he valve and measuremens of he conrol variables. S Noe: during he funcion, mainenance of he superhea se poin is no guaraneed, however he safey of he uni is ensured hrough acivaion of he proecors. If hese are acivaed, he procedure is inerruped; if, due o exernal disurbance or in he case of paricularly unsable sysems, he procedure canno suiably opimise he parameers, he conroller will coninue using he parameers saved in he memory before he procedure was sared. If he procedure ends successfully, he resuling conrol parameers will be auomaically saved. V M EV Fig. 5.b E P T 21

22 CP Compressor V Solenoid valve C Condenser T Temperaure probe L Liquid receiver EV Elecronic valve F Dewaering filer E Evaporaor S Liquid gauge P Pressure probe For informaion on he wiring see paragraph 2.11 General connecion diagram. 5.5 BLDC Conrol wih compressor Imporan: his ype of conrol is incompaible wih adapive conrol and auouning. To be able o use his conrol funcion, only available for CAREL valve drivers, he driver mus be conneced o a CAREL pco programmable conroller running an applicaion able o manage a uni wih BLDC scroll compressor. In addiion, he compressor mus be conrolled by he CAREL Power+ speed drive (wih inverer), specially designed o manage he speed profile required by he compressor operaing specificaions. Two probes are needed for superhea conrol (PA, TA) plus wo probes locaed downsream of he compressor (PB, TB) for discharge superhea and discharge emperaure (TB) conrol. Parameer/Descripion CONFIGURATION Main conrol AC/chiller wih BLDC compressor L C EVD evoluion Def. muliplexed showcase/cold room TB PB POWER + speed drive Tab. 5.i 0V + - Temperaura di condensazione (C ) Condensing emperaure (C ) Inviluppo Envelope Temperaura di evaporazione (C ) Evaporaion emperaure (C ) Fig. 5.d The pco conroller defines he curren se poin according o he poin of operaion wihin he envelope: superhea sepoin; discharge superhea sepoin; discharge emperaure sepoin. Parameer/Descripion Def. Min. Max. UOM ADVANCED Superhea sepoin 11 LowSH: 180 (324) K ( F) hreshold Discharge superhea sepoin (-72) 180 (324) K ( F) Discharge emperaure sepoin (-76) 200 (392) C ( F) Tab. 5.j Noe: his conrol funcion is only available CAREL valve drivers. no se poin needs o be configured by he user. F S V M EV E S3 S4 GND Tx/Rx GND shield Fig. 5.c CP Compressor V Solenoid valve C Condenser S Liquid gauge L Liquid receiver EV Elecronic valve F Dewaering filer E Evaporaor TA, TB Temperaure probes PA, PB Pressure probes PA TA CP pco shield Modbus RS Superhea regulaion wih 2 emperaure probes The funcional diagram is shown below. This ype of conrol mus be used wih care, due o he lower precision of he emperaure probe compared o he probe ha measures he sauraed evaporaion pressure. Parameer/Descripion CONFIGURATION Main conrol superhea regulaion wih 2 emperaure probes Def. muliplexed showcase/cold room Tab. 5.k For informaion on he wiring see paragraph 2.11 General connecion diagram. To opimise performance of he refrigeran circui, compressor operaion mus always be inside a specific area, called he envelope, defined by he compressor manufacurer. 22

23 C For he wiring, see paragraph 2.11 General connecion diagram. F L EVD evoluion S4 CP This involves PID conrol wihou any proecors (LowSH, LOP, MOP, High Tcond, see he chaper on Proecors), wihou any valve unblock procedure and wihou auxiliary conrol. Conrol is performed on he pressure probe value read by inpu, compared o he se poin: EPR pressure se poin. Conrol is direc, as he pressure increases, he valve opens and vice-versa. S V M EV Parameer/descripion Def. Min. Max. UOM CONTROL EPR pressure se poin (-290) 200 (2900) barg (psig) PID propor. gain PID inegraion ime s PID derivaive ime s Tab. 5.m Fig. 5.e CP Compressor V Solenoid valve C Condenser S Liquid gauge L Liquid receiver EV Elecronic valve F Dewaering filer E Evaporaor T Temperaure probe Parameer/Descripion Def. Min. Max. UOM ADVANCED Superhea sepoin 11 LowSH: hreshold 180 (324) K ( F) PID: proporional gain PID: inegral ime s PID: derivaive ime s Tab. 5.l 5.7 Advanced regulaion EPR back pressure This ype of conrol can be used in many applicaions in which a consan pressure is required in he refrigeran circui. For example, a refrigeraion sysem may include differen showcases ha operae a differen emperaures (showcases for frozen foods, mea or dairy). The differen emperaures of he circuis are achieved using pressure regulaors insalled in series wih each circui. The special EPR funcion (Evaporaor Pressure Regulaor) is used o se a pressure se poin and he PID conrol parameers required o achieve his. M T E T E T EVD evoluion V1 V2 EV M T E P EVD evoluion V1 V2 EV Fig. 5.f V1 Solenoid valve E Evaporaor V2 Thermosaic expasnion valve EV Elecronic valve P Ho gas bypass by pressure This conrol funcion can be used o conrol cooling capaciy. If here is no reques from circui B, he compressor sucion pressure decreases and he bypass valve opens o le a greaer quaniy of ho gas flow and decrease he capaciy of he circui. A B F S M V1 M L V1 T V2 T V2 EV C EVD evoluion Fig. 5.g CP Compressor V1 Solenoid valve C Condenser V2 Thermosaic expasnion valve L Liquid receiver EV Elecronic valve F Dewaering filer E Evaporaor S Liquid indicaor For he wiring, see paragraph 2.11 General connecion diagram. This involves PID conrol wihou any proecors (LowSH, LOP, MOP, High Tcond, see he chaper on Proecors), wihou any valve unblock procedure and wihou auxiliary conrol. Conrol is performed on he ho gas bypass pressure probe value read by inpu, compared o he se poin: Ho gas bypass pressure se poin.conrol is reverse, as he pressure increases, he valve closes and vice-versa. Parameer/descripion Def. Min. Max. UOM CONTROL Ho gas bypass pressure se poin 3-20 (290) 200 (2900) barg (psig) PID propor. gain PID inegraion ime s PID derivaive ime s Tab. 5.n E E CP P 23

24 Ho gas bypass by emperaure This conrol funcion can be used o conrol cooling capaciy. On a refrigeraed cabine, if he ambien emperaure probe measures an increase in he emperaure, he cooling capaciy mus also increase, and so he valve mus close. C CP Compressor EV_1 EV_2 Elecronic valves conneced in complemenary mode C Condenser T Temperaure probe V1 Solenoid valve E Evaporaor V3 Non-reurn valve V2 Thermosaic expansion valve S Hea exchanger (reheaing) F S L EV EVD evoluion CP Transcriical CO2 gas cooler This soluion for he use of CO 2 in refrigeraing sysems wih a ranscriical cycle involves using a gas cooler, ha is a refrigeran/air hea exchanger resisan o high pressures, in place of he condenser. In ranscriical operaing condiions, for a cerain gas cooler oule emperaure, here is pressure ha opimises he efficiency of he sysem: M T V1 V2 Fig. 5.h CP Compressor V1 Solenoid valve C Condenser V2 Thermosaic expansion valve L Liquid receiver EV Elecronic valve F Dewaering filer E Evaporaor S Liquid indicaor E T Se= pressure se poin in a gas cooler wih ranscriical CO 2 T= gas cooler oule emperaure Defaul value: A= 3.3, B= In he simplified diagram shown below, he simples soluion in concepual erms is shown. The complicaions in he sysems arise due o he high pressure and he need o opimise efficiency. EVD evoluion For he wiring, see paragraph 2.11 General connecion diagram. This involves PID conrol wihou any proecors (LowSH, LOP, MOP, High Tcond, see he chaper on Proecors), wihou any valve unblock procedure and wihou auxiliary conrol. Conrol is performed on he ho gas bypass emperaure probe value read by inpu, compared o he se poin: Ho gas bypass emperaure se poin. Conrol is reverse, as he emperaure increases, he valve closes. EV IHE P T GC CP Parameer/descripion Def. Min. Max. UOM CONTROL Ho gas bypass emp. se poin (-76) 200 (392) C ( F) PID: proporional gain PID inegraion ime s PID derivaive ime s Tab. 5.o Anoher applicaion ha explois his conrol funcion uses he connecion of wo EXV valves ogeher o simulae he effec of a hree-way valve, called reheaing. To conrol humidiy, valve EV_1 is opened o le he refrigeran flow ino exchanger S. A he same ime, he air ha flows hrough evaporaor E is cooled and he excess humidiy removed, ye he emperaure is below he se room emperaure. I hen flows hrough exchanger S, which heas i back o he se poin (reheaing). M V1 T V2 Fig. 5.j CP Compressor V2 Thermosaic expasnion valve GC Gas cooler EV Elecronic valve E Evaporaor IHE Inside hea exchanger V1 Solenoid valve For he wiring, see paragraph 2.11 General connecion diagram. E C EV_2 s EV_1 CP EVD evoluion This involves PID conrol wihou any proecors (LowSH, LOP, MOP, High Tcond, see he chaper on Proecors), wihou any valve unblock procedure and wihou auxiliary conrol. Conrol is performed on he gas cooler pressure probe value read by inpu, wih a se poin depending on he gas cooler emperaure read by inpu ; consequenly here is no a se poin parameer, bu raher a formula: CO 2 gas cooler pressure se poin = Coefficien A * Tgas cooler () + Coefficien B. The se poin calculaed will be a variable ha is visible in display mode. Conrol is direc, as he pressure increases, he valve opens. V3 M V1 T V2 E T Parameer/descripion Def. Min. Max. UOM ADVANCED CO2 regul. A coefficien CO2 regul. B coefficien CONTROL PID propor. gain PID inegraion ime s PID derivaive ime s Tab. 5.p Fig. 5.i 24

25 Analogue posiioner (4 o 20 ma) The valve will be posiioned linearly depending on he value of he 4 o 20 ma inpu for analogue valve posiioning read by inpu. There is no PID conrol nor any proecion (LowSH, LOP, MOP, High Tcond, see he chaper on Proecors), no valve unblock procedure and no auxiliary conrol. EV EVD evoluion regulaor T P I/O expander for pco The EVD Evoluion driver is conneced o he pco programmable conroller via LAN, ransferring he probe readings quickly and wihou filering. The driver operaes as a simple acuaor, and receives he informaion needed o manage he valves from he pco. Parameer/Descripion CONFIGURATION Main conrol I/O expander for pco Def. muliplexed showcase/cold room Tab. 5.q 4-20 ma A 100% EVD evoluion EV 0% 4 20 ma Fig. 5.k EV Elecronic valve A Valve opening For he wiring, see paragraph 2.11 General connecion diagram. Forced closing will only occur when digial inpu DI1 opens, hus swiching beween conrol saus and sandby. The pre-posiioning and reposiioning procedures are no performed. Manual posiioning can be enabled when conrol is acive or in sandby. S3 S4 P T P T GND Tx/Rx GND shield pco Analogue posiioner (0 o 10 Vdc) The valve will be posiioned linearly depending on he value of he 0 o 10 V inpu for analogue valve posiioning read by inpu. There is no PID conrol nor any proecion (LowSH, LOP, MOP, High Tcond), no valve unblock procedure and no auxiliary conrol, wih corresponding forced closing of he valve and changeover o sandby saus. EV A 100% 0% EVD evoluion 0-10 Vdc regulaor 0 10 Vdc Fig. 5.l EV Elecronic valve A Valve opening For he wiring, see paragraph 2.11 General connecion diagram. Imporan: he pre-posiioning and reposiioning procedures are no performed. Manual posiioning can be enabled when conrol is acive or in sandby. T P Fig. 5.m T Temperaure probe P Pressure probe EV Elecronic valve 5.8 Auxiliary conrol Auxiliary conrol can be acivaed a he same ime as main conrol, and uses he probes conneced o inpus S3 and/or S4. Parameer/descripion Def. CONFIGURATION Auxiliary conrol: Disabled 1=Disabled; 2=High condensing emperaure proecion on S3 probe; 3=Modulaing hermosa on S4 probe; 4=Backup probes on S3 & S4; 5, 6, 7 = Reserved; 8 = Subcooling measuremen; 9 = Reverse high condensing emperaure proecion on S3 Tab. 5.r For he high condensing emperaure proecion (only available wih superhea conrol), an addiional pressure probe is conneced o S3 ha measures he condensing pressure. For he modulaing hermosa funcion (only available wih superhea conrol), an addiional emperaure probe is conneced o S4 ha measures he emperaure on used o perform emperaure conrol (see he corresponding paragraph). The las opion (available if main conrol = 1 o 18) requires he insallaion of boh probes S3 & S4, he firs pressure and he second emperaure. Noe: if only one backup probe is fied, under he manufacure parameers, he probe hresholds and alarm managemen can be se separaely. 25

26 HITCond proecion (high condensing emperaure) The funcional diagram is shown below. F L C EVD evoluion S3 CP P Examples of operaion: 3. offse oo low (or funcion disabled) S4 se poin + diff se poin SV ON OFF S S4 se poin + diff M V EEV E P T 4. offse oo high se poin SV ON OFF Fig. 5.n CP Compressor EEV Elecronic expansion valve C Condenser V Solenoid valve L Liquid receiver E Evaporaor F Dewaering filer P Pressure probe (ransducer) S Liquid indicaor T Temperaure probe For he wiring, see paragraph 2.11 General connecion diagram. As already menioned, he HITCond proecion can only be enabled if he conroller measures he condensing pressure/emperaure, and responds moderaely by closing he valve in he even where he condensing emperaure reaches excessive values, o preven he compressor from shuing down due o high pressure. The condensing pressure probe mus be conneced o inpu S3. Modulaing hermosa This funcion is used, by connecing a emperaure probe o inpu S4, o modulae he opening of he elecronic valve so as o limi he lowering of he emperaure read and consequenly reach he conrol se poin. This is useful in applicaions such as he muliplexed cabines o avoid he ypical swings in air emperaure due o he ON/OFF conrol (hermosaic) of he solenoid valve. A emperaure probe mus be conneced o inpu S4, locaed in a similar posiion o he one used for he radiional emperaure conrol of he cabine. In pracice, he close he conrolled emperaure ges o he se poin, he more he conrol funcion decreases he cooling capaciy of he evaporaor by closing he expansion valve. By correcly seing he relaed parameers (see below), a very sable cabine emperaure can be achieved around he se poin, wihou ever closing he solenoid valve. The funcion is defined by hree parameers: se poin, differenial and offse. Parameer/descripion Def. Min. Max. UOM ADVANCED Modul. hermos sepoin C ( F) (-76) (392) Modul. hermos differenial C ( F) (0.2) (180) Modul. hermos SHse offse (0= funcion disabled) 0 0 (0) 100 (180) K ( R) Tab. 5.s The firs wo should have values similar o hose se on he conroller for he cabine or uiliy whose emperaure is being modulaed. The offse, on he oher hand, defines he inensiy in closing he valve as he emperaure decreases: he greaer he offse, he more he valve will be modulaed. The funcion is only acive in a emperaure band beween he se poin and he se poin plus he differenial. 5. offse correc S4 se poin + diff se poin SV ON OFF Fig. 5.o diff= differenial SV= solenoid valve (showcase emperaure conrol) S4= emperaure F S V L M EEV C EVD evoluion Fig. 5.p CP Compressor EEV Elecronic expansion valve C Condenser V Solenoid valve L Liquid receiver E Evaporaor F Dewaering filer P Pressure probe (ransducer) S Liquid indicaor T Temperaure probe For he wiring, see paragraph 2.11 General connecion diagram. S4 T E P T CP Imporan: he Modulaing hermosa funcion should no be used on sand-alone refrigeraion unis, bu only in cenralised sysems. In fac, in he former case closing he valve would cause a lowering of he pressure and consequenly shu down he compressor. 26

27 Backup probes on S3 & S4 Imporan: his ype of conrol is compaible wih he main conrol parameer seing beween 1 and 18. In his case, pressure probe S3 and emperaure probe S4 will be used o replace probes and respecively in he even of fauls on one or boh, so as o guaranee a high level of reliabiliy of he conrolled uni. L C The subcooling measuremen uses he difference beween he condensing emperaure aken from he relaive pressure reading and he emperaure of he liquid refrigeran exiing he condenser. This measuremen indicaes he refrigeran charge in he circui. A value near 0 K indicaes possible insufficien refrigeran, which may cause a decline in circui cooling efficiency, a reducion in mass flow hrough he expansion valve and swings in superhea conrol. In addiion, i may indicae a refrigeran leak in circuis where he nominal subcooling value is known. A subcooling value ha is oo high, for example above 20 K, when no required by he applicaion may indicae excessive refrigeran charge in he circui, and can cause unusually high condensing pressure values wih a consequen decline in circui cooling efficiency and possible compressor shudown due o he high pressure swich ripping. F S M V EEV EVD evoluion S3 S4 E P CP T P T Fig. 5.q CP Compressor EEV Elecronic expansion valve C Condenser V Solenoid valve L Liquid receiver E Evaporaor F Dewaering filer P Pressure probe (ransducer) S Liquid indicaor T Temperaure probe For he wiring, see paragraph 2.11 General connecion diagram. Subcooling measuremen This funcion measures subcooling using a pressure probe and a emperaure probe conneced o inpus S3 and S4 respecively. The reading can be sen o a conroller conneced in he serial nework (e.g. pco). C Reverse high condensing emperaure proecion (HiTcond) on S3 The aim of reverse HiTcond proecion is o limi he condensing pressure in he refrigeran circui by opening he valve raher han closing i. This funcion is recommended, raher han he HiTcond proecion funcion described previously, in refrigeran circuis wihou a liquid receiver and where he condenser is smaller han he evaporaor (e.g. air-o-waer hea pumps). In his case, in fac, closing he valve would obsruc he flow of refrigeran o he condenser ha, lacking sufficien volume for he refrigeran o accumulae, would cause an increase in condensing pressure. This funcion is especially useful for condensers in CO 2 cascade sysems. See he chaper on Proecors. V F S M EVD evoluion S3 C CP P TB PB EEV E P T L Fig. 5.s F S EVD evoluion S3 S4 CP CP Compressor EEV Elecronic expansion valve C Condenser V Solenoid valve F Filer-drier E Evaporaor S Liquid gauge P Pressure probe (ransducer) T Temperaure probe V M For he wiring, see paragraph 2.11 General connecion diagram EEV E PA TA Fig. 5.r CP Compressor EEV Elecronic expansion valve C Condenser V Solenoid valve L Liquid receiver E Evaporaor F Filer-drier PA, PB Pressure probes S Liquid gauge TA, TB Temperaure probes For he wiring, see paragraph 2.11 General connecion diagram 27

28 6. FUNCTIONS 6.1 Power supply mode EVD evoluion can be powered a 24 Vac or 24 Vdc. In he even of direc curren power supply, afer compleing he commissioning procedure, o sar conrol se Power supply mode parameer=1. Parameer/Descripion Def. Min. Max. UOM ADVANCED Power supply mode 0=24 Vac 1= 24 Vdc Tab. 6.a Imporan: wih direc curren power supply, in he even of power failures emergency closing of he valve is no performed, even if he EVD0000UC0 module is conneced. 6.2 Nework connecion To connec an RS485/Modbus conroller o he nework, as well as he nework address parameer (see paragraph 4.2), he communicaion speed also needs o be se, in bi/s, using he Nework seings parameer. Parameer/Descripion Def. Min. Max. UoM ADVANCED NETWORK SETTINGS 0=4800 1=9600 2= bi/s Tab. 6.b Noe: he following Modbus serial communicaion parameers canno be se: bye size: 8 bis; sop bis: 2; pariy: none; ransmission mode: RTU. 6.3 Inpus and oupus Analogue inpus The parameers in quesion concern he choice of he ype of pressure probe and S3 and he choice of he emperaure probe and S4, as well as he possibiliy o calibrae he pressure and emperaure signals. As regards he choice of pressure probe, see he chaper on Commissioning. Inpus, S4 The opions are sandard NTC probes, high emperaure NTC, combined emperaure and pressure probes and 0 o 10 Vdc inpu. For S4 he 0 o 10 Vdc inpu is no available. When choosing he ype of probe, he minimum and maximum alarm values are auomaically se. See he chaper on Alarms. The auxiliary probe S4 is associaed wih he Modulaing hermosa funcion or can be used as a backup probe for he main probe. Type CAREL code Range CAREL NTC (10KΩ a 25 C) NTC0**HP00-50T105 C NTC0**WF00 NTC0**HF00 CAREL NTC-HT HT (50KΩ a 25 C) NTC0**HT00 0T120 C (150 C per 3000 h) NTC buil-in SPKP**T0-40T120 C Tab. 6.c Imporan: in case of NTC buil-in probe, selec also he parameer relevan o he corresponding raiomeric pressure probe. Parameer/descripion CONFIGURATION Probe : CAREL NTC; CAREL NTC-HT high T; NTC buil-in SPKP**T0; 0-10 V exernal signal Probe S4: CAREL NTC; CAREL NTC-HT high T; NTC buil-in SPKP**T0 Def. CAREL NTC CAREL NTC Tab. 6.d Inpu S3 The auxiliary probe S3 is associaed wih he high condensing emperaure proecion or can be used as a backup probe for he main probe. If he probe being used is no included in he lis, selec any 0 o 5 V raiomeric or elecronic 4 o 20 ma probe and hen manually modify he minimum and maximum measuremen in he manufacurer parameers corresponding o he probes. Imporan: probes and S3 mus be he same ype; probes S3 and S4 are shown as NOT USED if he auxiliary conrol parameer is se as disabled. If auxiliary conrol has any oher seing, he manufacurer seing for he probe used will be shown, which can be seleced according o he ype. Auxiliary conrol High condensing emperaure proecion Modulaing hermosa Backup probes Subcooling measuremen Reverse high condensing emperaure proecion on S3 Parameer/descripion Configuraion Probe S3: Raiomeric (OUT=0 o 5 V) Elecronic (OUT=4 o 20 ma) 1= -1 o 4.2 barg 8= -0.5 o 7 barg 2= 0.4 o 9.3 barg 9= 0 o 10 barg 3= -1 o 9.3 barg 10= 0 o 18,2 barg 4= 0 o 17.3 barg 11= 0 o 25 barg 5= 0.85 o 34.2 barg 12= 0 o 30 barg 6= 0 o 34.5 barg 13= 0 o 44.8 barg 7= 0 o 45 barg 14= remoe, -0.5 o 7 barg 15= remoe, 0 o 10 barg 16= remoe, 0 o 18,2 barg 17= remoe, 0 o 25 barg 18= remoe, 0 o 30 barg 19= remoe, 0 o 44.8 barg 20= 4-20 ma exernal signal ( canno be seleced) 21= -1 o 12.8 barg 22= 0 o 20.7 barg 23= 1.86 o 43.0 barg Variable displayed S3 S4 S3,S4 S3, S4 S3 Def. Raiom.: -1 o 9.3 barg Tab. 6.e Tab. 6.f Calibraing pressure probes, S3 and emperaure probes and S4 (offse and gain parameers) In case i is necessary o make a calibraion: of he pressure probe, and/or S3 i is possible o use he offese parameer, which represens a consan ha is added o he signal across he enire range of measuremen, and can be expressed in barg/psig. If he 4 o 20 ma signal coming from an exernal conroller on inpu needs o be calibraed, boh he offse and he gain parameers can be used, he laer which modifies he gradien of he line in he field from 4 o 20 ma. of he emperaure probe, and/or S4 i is possible o use he offse parameer, which represens a consan ha is added o he signal across he enire range of measuremen, and can be expressed in C/ F. If he 0 o 10 Vdc signal coming from an exernal conroller on inpu needs o be calibraed, boh he offse and he gain parameers can be used, he laer which modifies he gradien of he line in he field from 0 o 10 Vdc. 28

29 A A= offse, B= gain B ma Fig. 6.a A B Vdc Parameer/descripion Def. Min. Max. UOM PROBES calibraion offse 0-60 (-870), 60 (870), barg (psig), ma calibraion gain on 4-20 ma calibraion offse 0-20 (-290), (290), C ( F), vol 20 calibraion gain, 0 o 10 V S3 calibraion offse 0-60 (-870) 60 (870) barg (psig) S4 calibraion offse 0-20 (-36) 20 (36) C ( F) Tab. 6.g Digial inpus The funcions of digial inpus 1 and 2 can be se by parameer, as shown in he able below: Parameer/descripion Def. Min. Max. UOM CONFIGURATION DI1 configuraion 5/ = Disabled 2= Valve regulaion opimizaion afer defros 3= Discharged baery alarm managemen 4= Valve forced open (a 100%) 5= Regulaion sar/sop 6= Regulaion backup 7= Regulaion securiy CONTROL Sar delay afer defros min Tab. 6.h Valve regulaion opimizaion afer defros: he seleced digial inpu ells he driver he curren defros saus. Defros acive = conac closed. Access Manufacurer programming mode o se he sar delay afer defros. Discharged baery alarm managemen: if he seleced digial inpu is conneced o he baery charge module for EVD evoluion, EVBAT00400, he conroller signals discharged or fauly baeries, so as o generae an alarm message and warn he service echnicians ha mainenance is required. See he connecion diagram in chaper 2. Prioriy of digial inpus In cerain cases he seing of digial inpus 1 and 2 may be he same or alernaively may be incompaible (e.g.: digial inpu 1 = regulaion backup, digial inpu 2 = regulaion securiy). The problem hus arises o deermine which funcion he driver needs o perform. Consequenly, each ype of funcion is assigned a prioriy, primary (PRIM) or secondary (SEC), as shown in he able: DI1/DI2 configuraion Type of funcion 1=Disabled SEC 2=Valve regulaion opimizaion afer defros SEC 3=Discharged baery alarm managemen SEC 4=Valve forced open (a 100%) SEC 5=Regulaion sar/sop PRIM 6=Regulaion backup PRIM 7=Regulaion securiy PRIM There are four possible cases of digial inpu configuraions wih primary or secondary funcions. Funcion se Funcion performed by digial inpu DI1 DI2 PRIM SEC PRIM PRIM DI1 - PRIM SEC DI1 DI2 SEC PRIM DI2 DI1 SEC SEC Regulaion backup (supervisor variable) DI1 Noe ha: if digial inpus 1 and 2 are se o perform a PRIM funcion, only he funcion se for inpu 1 is performed; if he digial inpus 1 and 2 are se o perform a SEC funcion, only he SEC funcion se for inpu 1 is performed; he driver will be se o Regulaion backup wih he value of he digial inpu deermined by he Regulaion backup from supervisor variable. Relay oupu The relay oupu can be configured as: alarm relay oupu. See he chaper on Alarms; solenoid valve conrol; elecronic expansion valve saus signal relay. The relay conac is only open if he valve is closed (opening=0%). As soon as conrol sars (opening >0%, wih hyseresis), he relay conac is closed Parameer/descripion Def. CONFIGURATION Relay configuraion: Alarm 1= Disabled; 2= alarm relay (opened in case of alarm); 3= Solenoid valve relay (open in sandby); 4= valve + alarm relay (open relay in sandby and conrol alarms) 5= Reversed alarm relay (closed in case of alarm); 6= Valve saus relay (open if valve is closed) Tab. 6.i Valve forced open: when he digial inpu closes, he valve opens compleely (100%), uncondiionally. When he conac opens again he valve closes and moves o he posiion defined by he parameer valve opening a sar-up for he pre-posiion ime. Conrol can hen sar. Regulaion sar/sop: digial inpu closed: conrol acive; digial inpu open: driver in sandby (see he paragraph Conrol saus ); Imporan: his seing excludes acivaion/deacivaion of conrol via he nework. See he following funcions. Regulaion backup: if here is a nework connecion and communicaion fails, he driver checks he saus of he digial inpu o deermine wheher conrol is acive or in sandby; Regulaion securiy: if here is a nework connecion, before conrol is acivaed he driver mus receive he conrol acivaion signal and he seleced digial inpu mus be closed. If he digial inpu is open, he driver always remains in sandby. 29

30 6.4 Conrol saus The elecronic valve driver has 6 differen ypes of conrol saus, each of which may correspond o a specific phase in he operaion of he refrigeraion uni and a cerain saus of he driver-valve sysem. The saus may be as follows: forced closing: iniialisaion of he valve posiion when swiching he insrumen on; sandby: no emperaure conrol, uni OFF; wai: opening of he valve before saring conrol, also called preposiioning, when powering he uni and in he delay afer defrosing; conrol: effecive conrol of he elecronic valve, uni ON; posiioning: sep-change in he valve posiion, corresponding o he sar of conrol when he cooling capaciy of he conrolled uni varies (only for plan EVD conneced o a pco); sop: end of conrol wih he closing of he valve, corresponds o he end of emperaure conrol of he refrigeraion uni, uni OFF; valve moor error recogniion: see paragraph 9.5 uning in progress: see paragraph 5.3. Forced closing Forced closing is performed afer he driver is powered-up and corresponds o a number of closing seps equal o he parameer Closing seps, based on he ype valve seleced. This is used o realign he valve o he physical posiion corresponding o compleely closed. The driver and he valve are hen ready for conrol and boh aligned a 0 (zero). On power-up, firs a forced closing is performed, and hen he sandby phase sars. Paramero/descripion Def. Min. Max. UOM VALVE EEV closing seps sep Tab. 6.j The valve is closed in he even of power failures wih 24 Vac power supply when he EVD0000UC0 module is conneced. In his case, he parameer Forced valve closing no compleed, visible only on he supervisor, is forced o 1. If when resaring forced closing of he valve was no successful: 1. he Maser programmable conroller checks he value of he parameer and if his is equal o 1, decides he bes sraegy o implemen based on he applicaion; 2. he driver on resar posiions he valve as explained in he paragraph Pre-posiioning/sar conrol The parameer is rese o 0 (zero) by he Maser conroller (e.g. pco), once he parameer has been se o 1 he driver reurns i o 0 (zero) only if forced emergency closing is compleed successfully. Sandby Sandby corresponds o a siuaion of res in which no signals are received o conrol he elecronic valve. This normally occurs: when he refrigeraion uni sops operaing, eiher when swiched off manually (e.g. from he buon, supervisor) or when reaching he conrol se poin; during defross, excep for hose performed by reversing of he cycle (or ho gas bypass). In general, i can be said ha he elecronic valve driver is in sandby when he compressor sops or he solenoid valve closes. LThe valve is closed or open according o he seing of Valve open in sandby. The percenage of opening is se using Valve posiion in sandby. In his phase, manual posiioning can be acivaed. Parameer/descripion Def. Min. Max. UOM CONTROL Valve open in sandby =disabled=valve closed; 1=enabled = valve open according o parameer Valve posiion in sandby Valve posiion in sandby 0 = 25 % (*) 1 100% = % opening (**) % Tab. 6.k These wo parameers deermine he posiion of he valve in sandby based on he minimum and maximum number of valve seps. Parameer/descripion Def. Min. Max. UOM VALVE Minimum EEV seps sep Maximum EEV seps sep Tab. 6.l (*) The formula used is: Aperura / Opening = Min_sep_EEV+(Max_sep_EEV-Min_sep_EEV)/100* % Min_sep_EEV Max_sep_EEV (**) In his case, he formula used is: Fig. 6.b 1% 99% 0% 100% Min_sep_EEV Max_sep_EEV seps Aperura / Opening = P*(Max_sep_EEV / 100) P = Posizione valvola in sand-by / Posiion valve in sand-by Fig. 6.c seps Noe: if Valve open in sandby=1, he posiions of he valve when seing Valve posiion in sandby =0 and 25 do no coincide. Refer o he above formulae. Pre-posiioning/sar conrol If during sandby a conrol reques is received, before saring conrol he valve is moved o a precise iniial posiion. IThe pre-posiion ime is he ime he valve is held in a seady posiion based on he parameer Valve opening a sar-up. Parameer/descripion Def. Min. Max. UOM CONTROL Pre-posiioning ime s Valve opening a sar-up (evaporaor/valve % capaciy raio) Tab. 6.m The valve opening parameer should be se based on he raio beween he raed cooling capaciy of he evaporaor and he valve (e.g. raed evaporaor cooling capaciy: 3kW, raed valve cooling capaciy: 10kW, valve opening = 3/10 = 33%). If he capaciy reques is 100%: Opening (%)= (Valve opening a sar-up); If he capaciy reques is less han 100% (capaciy conrol): Opening (%)= (Valve opening a sar-up) (Curren uni cooling capaciy), where he curren uni cooling capaciy is sen o he driver via plan by he pco conroller. If he driver is sand-alone, his is always equal o 100%. Noe: his procedure is used o anicipae he movemen and bring he valve significanly closer o he operaing posiion in he phases immediaely afer he uni sars; if here are problems wih liquid reurn afer he refrigeraion uni sars or in unis ha frequenly swich on-off, he valve opening a sar-up mus be decreased. If here are problems wih low pressure afer he refrigeraion uni sars, he valve opening mus be increased. 30

31 Wai When he calculaed posiion has been reached, regardless of he ime aken (his varies according o he ype of valve and he objecive posiion), here is a consan 5 second delay before he acual conrol phase sars. This is o creae a reasonable inerval beween sandby, in which he variables have no meaning, as here is no flow of refrigeran, and he effecive conrol phase. Conrol The conrol reques can be received by he closing of digial inpu 1 or via he nework (LAN). The solenoid or he compressor are acivaed when he valve, following he pre-posiioning procedure, has reached he calculaed posiion. The following figure represens he sequence of evens for saring conrol of he refrigeraion uni. If here is a change in uni cooling capaciy of a leas 10%, sen from he pco via he plan, he valve is posiioned proporionally. In pracice, his involves reposiioning saring from he curren posiion in proporion o how much he cooling capaciy of he uni has increased or decreased in percenage erms. When he calculaed posiion has been reached, regardless of he ime aken (his varies according o he ype of valve and he posiion), here is a consan 5 second delay before he acual conrol phase sars. Noe: if informaion is no available on he variaion in uni cooling capaciy, his will always be considered as operaing a 100% and herefore he procedure will never be used. In his case, he PID conrol mus be more reacive (see he chaper on Conrol) so as o reac promply o variaions in load ha are no communicaed o he driver. Conrol delay afer defros Some ypes of refrigeraing cabines have problems conrolling he elecronic valve in he operaing phase afer defros. In his period (10 o 20 min afer defrosing), he superhea measuremen may be alered by he high emperaure of he copper pipes and he air, causing excessive opening of he elecronic valve for exended periods, in which here is reurn of liquid o he compressors ha is no deeced by he probes conneced o he driver. In addiion, he accumulaion of refrigeran in he evaporaor in his phase is difficul o dissipae in a shor ime, even afer he probes have sared o correcly measure he presence of liquid (superhea value low or null). The driver can receive informaion on he defros phase in progress, via digial inpu 2. The Sar-up delay afer defros parameer is used o se a delay when conrol resumes so as o overcome his problem. During his delay, he valve will remain in he pre-posiioning poin, while all he normal probe alarms procedures, ec. managed. Parameer/descripion Def. Min. Max. UOM CONTROL Sar-up delay afer defros min Tab. 6.n Imporan: if he superhea emperaure should fall below he se poin, conrol resumes even if he delay has no ye elapsed. A S P R ON OFF ON OFF ON OFF ON OFF T1 W Fig. 6.d A Conrol reques W Wai S Sandby T1 Pre-posiioning ime P Pre-posiioning T2 Sar-up delay afer defros R Conrol Time Posiioning (change cooling capaciy) This conrol saus is only valid for he plan driver. T2 A C ON NP OFF R ON OFF ON OFF ON OFF T3 Fig. 6.e A Conrol reques T3 Reposiioning ime C Change capaciy W Wai NP Reposiioning Time R Conrol Sop/end conrol The sop procedure involves closing he valve from he curren posiion unil reaching 0 seps, plus a furher number of seps so as o guaranee complee closing. Following he sop phase, he valve reurns o sandby.. A S R ON OFF ON OFF ON ST OFF ON OFF T4 Fig. 6.f A Conrol reques R Conrol S Sandby T4 Sop posiion ime ST Sop Time W 31

32 6.5 Advanced conrol saus As well as normal conrol saus, he driver can have 3 special ypes of saus relaed o specific funcions: manual posiioning: his is used o inerrup conrol so as o move he valve, seing he desired posiion; recover physical valve posiion: recover physical valve seps when fully opened or closed; unblock valve: forced valve movemen if he driver considers i o be blocked. Manual posiioning Manual posiioning can be acivaed a any ime during he sandby or conrol phase. Manual posiioning, once enabled, is used o freely se he posiion of he valve using he corresponding parameer. Conrol is placed on hold, all he sysem and conrol alarms are enabled, however neiher conrol nor he proecors can be acivaed. Manual posiioning hus has prioriy over any saus/proecion of he driver When he driver is conneced o he nework (for example o a pco conroller), in presence of an communicaion-error (LAN error), manual posiioning can be inhibied emporarily by he parameer and he driver recognizes he sar/sop regulaion, depending on he configuraion of he digial inpus. Parameer/descripion Def. Min. Max. UOM CONTROL Enable manual valve posiion Manual valve posiion sep Sop manual posiioning on nework error 0 = Normal operaion; 1 = Sop Tab. 6.o Unblock valve This procedure is only valid when he driver is performing superhea conrol. Unblock valve is an auomaic safey procedure ha aemps o unblock a valve ha is supposedly blocked based on he conrol variables (superhea, valve posiion). The unblock procedure may or may no succeed depending on he exen of he mechanical problem wih he valve. If for 10 minues he condiions are such as o assume he valve is blocked, he procedure is run a maximum of 5 imes. The sympoms of a blocked valve do no necessarily mean a mechanical blockage. They may also represen oher siuaions: mechanical blockage of he solenoid valve upsream of he elecronic valve (if insalled); elecrical damage o he solenoid valve upsream of he elecronic valve; blockage of he filer upsream of he elecronic valve (if insalled); elecrical problems wih he elecronic valve moor; elecrical problems in he driver-valve connecion cables; incorrec driver-valve elecrical connecion; elecronic problems wih he valve conrol driver; secondary fluid evaporaor fan/pump malfuncion; insufficien refrigeran in he refrigeran circui; refrigeran leaks; lack of subcooling in he condenser; elecrical/mechanical problems wih he compressor; processing residues or moisure in he refrigeran circui. Noe: he valve unblock procedure is noneheless performed in each of hese cases, given ha i does no cause mechanical or conrol problems. Therefore, also check hese possible causes before replacing he valve. Noe: he manual posiioning saus is NOT saved when resaring afer a power failure. in for any reason he valve needs o be kep saionary afer a power failure, proceed as follows: - remove he valve saor; - in Manufacurer programming mode, under he configuraion parameers, se he PID proporional gain= 0. The valve will remain sopped a he iniial opening posiion, se by corresponding parameer. Recover physical valve posiion Parameer/descripion Def. Min. Max. UOM VALVE EEV opening synchroniz EEV closing synchroniz Tab. 6.p This procedure is necessary as he sepper moor inrinsically ends o lose seps during movemen. Given ha he conrol phase may las coninuously for several hours, i is probable ha from a cerain ime on he esimaed posiion sen by he valve driver does no correspond exacly o he physical posiion of he movable elemen. This means ha when he driver reaches he esimaed fully closed or fully open posiion, he valve may physically no be in ha posiion. The Synchronisaion procedure allows he driver o perform a cerain number of seps in he suiable direcion o realign he valve when fully opened or closed. Noe: realignmen is in inrinsic par of he forced closing procedure and is acivaed whenever he driver is sopped/sared and in he sandby phase; he possibiliy o enable or disable he synchronisaion procedure depends on he mechanics of he valve. When he seing he valve parameer, he wo synchronisaion parameers are auomaically defined. The defaul values should no be changed. 32

33 7. PROTECTORS These are addiional funcions ha are acivaed in specific siuaions ha are poenially dangerous for he uni being conrolled. They feaure an inegral acion, ha is, he acion increases gradually when moving away from he acivaion hreshold. They may add o or overlap (disabling) normal PID superhea conrol. By separaing he managemen of hese funcions from PID conrol, he parameers can be se separaely, allowing, for example, normal conrol ha is less reacive ye much faser in responding when exceeding he acivaion limis of one of he proecors. 7.1 Proecors The proecors are 5: LowSH, low superhea; LOP, low evaporaion emperaure; MOP, high evaporaion emperaure; High Tcond, high condensing emperaure; Reverse HiTcond. Noe: he HiTcond proecors require an addiional probe (S3) o hose normally used, eiher insalled on he driver, or conneced via LAN or plan o a conroller. The proecors have he following main feaures: acivaion hreshold: depending on he operaing condiions of he conrolled uni, his is se in Service programming mode; inegraion ime, which deermines he inensiy (if se o 0, he proecor is disabled): se auomaically based on he ype of main conrol; alarm, wih acivaion hreshold (he same as he proecor) and imeou (if se o 0 disables he alarm signal). Noe: The alarm signal is independen from he effeciveness of he proecor, and only signals ha he corresponding hreshold has been exceeded. If a proecor is disabled (null inegraion ime), he relaive alarm signal is also disabled. Each proecor is affeced by he proporional gain parameer (K) for he PID superhea conrol. The higher he value of K, he more inense he reacion of he proecor will be. Characerisics of he proecors Proecion Reacion Rese LowSH Inense closing Immediae LOP Inense opening Immediae MOP Moderae closing Conrolled High Tcond Moderae closing Conrolled Reverse HiTcond Moderae opening Conrolled Tab. 7.a Reacion: summary descripion of he ype of acion in conrolling he valve. Rese: summary descripion of he ype of rese following he acivaion of he proecor. Rese is conrolled o avoid swings around he acivaion hreshold or immediae reacivaion of he proecor. LowSH (low superhea) The proecor is acivaed so as o preven he reurn of liquid o he compressor due o excessively low superhea valves from. Parameer/descripion Def. Min. Max. UOM CONTROL LowSH proecion hreshold 5-40 (-72) se poin K ( F) superhea LowSH proecion inegraion s ime ALARM CONFIGURATION Low superhea alarm imeou (LowSH) (0= alarm DISABLED) s Tab. 7.b When he superhea value falls below he hreshold, he sysem eners low superhea saus, and he inensiy wih which he valve is closed is increased: he more he superhea falls below he hreshold, he more inensely he valve will close. The LowSH hreshold, mus be less han or equal o he superhea se poin. The low superhea inegraion ime indicaes he inensiy of he acion: he lower he value, he more inense he acion. The inegraion ime is se auomaically based on he ype of main conrol. SH Low_SH_TH ON Low_SH OFF A ON OFF Fig. 7.a SH Superhea A Alarm Low_SH_TH Low_SH proecion hreshold D Alarm imeou Low_SH Low_SH proecion Time B Auomaic alarm rese D LOP (low evaporaion pressure) LOP= Low Operaing Pressure The LOP proecion hreshold is applied as a sauraed evaporaion emperaure value so ha i can be easily compared agains he echnical specificaions supplied by he manufacurers of he compressors. The proecor is acivaed so as o preven oo low evaporaion emperaures from sopping he compressor due o he acivaion of he low pressure swich. The proecor is very useful in unis wih compressors on board (especially muli-sage), where when saring or increasing capaciy he evaporaion emperaure ends o drop suddenly. When he evaporaion emperaure falls below he low evaporaion emperaure hreshold, he sysem eners LOP saus and is he inensiy wih which he valve is opened is increased. The furher he emperaure falls below he hreshold, he more inensely he valve will open. The inegraion ime indicaes he inensiy of he acion: he lower he value, he more inense he acion. Parameer/descripion Def. Min. Max. UOM CONTROL LOP proecion hreshold (-76) Proecion MOP: C ( F) hreshold LOP proecion inegraion ime s ALARM CONFIGURATION Low evaporaion emperaure alarm imeou (LOP) (0= alarm DISABLED) s Tab. 7.c The inegraion ime is se auomaically based on he ype of main conrol. Noe: he LOP hreshold mus be lower hen he raed evaporaion emperaure of he uni, oherwise i would be acivaed unnecessarily, and greaer han he calibraion of he low pressure swich, oherwise i would be useless. As an iniial approximaion i can be se o a value exacly half-way beween he wo limis indicaed; B 33

34 he proecor has no purpose in muliplexed sysems (showcases) where he evaporaion is kep consan and he saus of he individual elecronic valve does no affec he pressure value; he LOP alarm can be used as an alarm o highligh refrigeran leaks by he circui. A refrigeran leak in fac causes an abnormal lowering of he evaporaion emperaure ha is proporional, in erms of speed and exen, o he amoun of refrigeran dispersed. LOP ALARM T_EVAP LOP_TH ON OFF ON OFF Fig. 7.b T_EVAP Evaporaion emperaure D Alarm imeou LOP_TH Low evaporaion emperaure proecion hreshold ALARM Alarm LOP LOP proecion Time B Auomaic alarm rese D B As he acion is inegral, i depends direcly on he difference beween he evaporaion emperaure and he acivaion hreshold. The more he evaporaion emperaure increases wih reference o he MOP hreshold, he more inensely he valve will close. The inegraion ime indicaes he inensiy of he acion: he lower he value, he more inense he acion. T_EVAP MOP_TH MOP_TH - 1 ON MOP OFF ON PID OFF ON ALARM OFF D Fig. 7.c T_EVAP Evaporaion emperaure MOP_TH MOP hreshold PID PID superhea conrol ALARM Alarm MOP MOP proecion Time D Alarm imeou MOP (high evaporaion pressure) MOP= Maximum Operaing Pressure. The MOP proecion hreshold is applied as a sauraed evaporaion emperaure value so ha i can be easily compared agains he echnical specificaions supplied by he manufacurers of he compressors. The proecor is acivaed so as o preven oo high evaporaion emperaures from causing an excessive workload for he compressor, wih consequen overheaing of he moor and possible acivaion of he hermal proecor. The proecor is very useful in self-conained unis if saring wih a high refrigeran charge or when here are sudden variaions in he load. The proecor is also useful in muliplexed sysems (showcases), as allows all he uiliies o be enabled a he same ime wihou causing problems of high pressure for he compressors. To reduce he evaporaion emperaure, he oupu of he refrigeraion uni needs o be decreased. This can be done by conrolled closing of he elecronic valve, implying superhea is no longer conrolled, and an increase in he superhea emperaure. The proecor will hus have a moderae reacion ha ends o limi he increase in he evaporaion emperaure, keeping i below he acivaion hreshold while rying o sop he superhea from increasing as much as possible. Normal operaing condiions will no resume based on he acivaion of he proecor, bu raher on he reducion in he refrigeran charge ha caused he increase in emperaure. The sysem will herefore remain in he bes operaing condiions (a lile below he hreshold) unil he load condiions change. Parameer/descripion Def. Min. Max. UOM CONTROL MOP proecion hreshold 50 Proecion LOP: 200 C ( F) hreshold (392) MOP proecion inegraion ime s ALARM CONFIGURATION High evaporaion emperaure alarm imeou (MOP) (0= alarm DISABLED) s Tab. 7.d The inegraion ime is se auomaically based on he ype of main conrol. When he evaporaion emperaure rises above he MOP hreshold, he sysem eners MOP saus, superhea conrol is inerruped o allow he pressure o be conrolled, and he valve closes slowly, rying o limi he evaporaion emperaure. Imporan: he MOP hreshold mus be greaer han he raed evaporaion emperaure of he uni, oherwise i would be acivaed unnecessarily. The MOP hreshold is ofen supplied by he manufacurer of he compressor. I is usually beween 10 C and 15 C. If he closing of he valve also causes an excessive increase in he sucion emperaure () above he se hreshold only se via supervisor (PlanVisor, pco, VPM), no on he display - he valve will be sopped o preven overheaing he compressor windings, awaiing a reducion in he refrigeran charge. If he MOP proecion funcion is disabled by seing he inegral ime o zero, he maximum sucion emperaure conrol is also deacivaed. Parameer/descripion Def. Min. Max. UOM CONTROL MOP proecion: sucion emperaure hreshold (-72) 200 (392) C( F) Tab. 7.e A he end of he MOP proecion funcion, superhea regulaion resars in a conrolled manner o preven he evaporaion emperaure from exceeding he hreshold again. High Tcond (high condensing emperaure) To acivae he high condensing emperaure proecor (High Tcond), a pressure probe mus be conneced o inpu S3. The proecor is acivaed so as o preven oo high evaporaion emperaures from sopping he compressor due o he acivaion of he high pressure swich. Parameer/descripion Def. Min. Max. UOM ADVANCED High Tcond hreshold C ( F) (-76) (392) High Tcond inegraion ime s ALARM CONFIGURATION High condensing emperaure alarm imeou (High Tcond) (0= alarm DISABLED) s Tab. 7.f 34

35 The inegraion ime is se auomaically based on he ype of main conrol. C Noe: he proecor is very useful in unis wih compressors on board if he air-cooled condenser is undersized or diry/malfuncioning in he more criical operaing condiions (high ouside emperaure); he proecor has no purpose in muliplexed sysems (showcases), where he condensing pressure is mainained consan and he saus of he individual elecronic valves does no affec he pressure value. F1 L1 A EVD evoluion CP1 To reduce he condensing emperaure, he oupu of he refrigeraion uni needs o be decreased. This can be done by conrolled closing of he elecronic valve, implying superhea is no longer conrolled, and an increase in he superhea emperaure. The proecor will hus have a moderae reacion ha ends o limi he increase in he condensing emperaure, keeping i below he acivaion hreshold while rying o sop he superhea from increasing as much as possible. Normal operaing condiions will no resume based on he acivaion of he proecor, bu raher on he reducion in he ouside emperaure. The sysem will herefore remain in he bes operaing condiions (a lile below he hreshold) unil he environmenal condiions change. T_COND V M EEV L2 F2 CHE B S3 S4 P1 T1 P2 CP2 T_COND_TH T_COND_TH - Δ ON HiTcond OFF V1 M T V2 E ON PID OFF ON ALARM OFF Fig. 7.d T_COND Condensing emperaure T_COND_TH High Tcond hreshold High Tcond High Tcond proecion saus ALARM Alarm PID PID superhea conrol Time D Alarm imeou D Noe: he High Tcond hreshold mus be greaer han he raed condensing emperaure of he uni and lower hen he calibraion of he high pressure swich; he closing of he valve will be limied if his causes an excessive decrease in he evaporaion emperaure. Reverse HiTcond (for CO 2 cascade sysems) As menioned earlier, reverse high condensing emperaure proecion (HiTcond) on S3, opens he valve o limi refrigeran circui condensing pressure by filling par of he evaporaor. The graph of how he funcion works is similar o he one shown for HiTCond proecion. Imporan: opening he valve will probably also cause acivaion of he low superhea proecion LowSH, which ends o limi he opening of he valve. The raio beween he inegral imes of hese wo concurren ye opposing proecors deermines how effecive one is compared o he oher. This funcion is especially useful for condensers in CO 2 cascade sysems, where condensaion in he low emperaure circui (also called secondary, B) akes place when evaporaing he refrigeran in he medium emperaure circui ( primary, A). Fig. 7.e CP1/2 Compressor 1/2 EEV Elecronic expansion valve CHE Cascade hea exchanger C Condenser L1/2 Liquid receiver 1/2 V Solenoid valve F1/2 Filer-drier 1/2 E Evaporaor /2 Liquid gauge 1/2 P1/2 Pressure probe (ransducer) T1 Temperaure probe V2 Thermosaic expansion valve For he wiring, see paragraph 2.11 General connecion diagram Noe: for his ype of applicaion, he auxiliary refrigeran mus be se as CO 2 (R744). Parameer / Descripion Def. Refrigeran Alls refrigerans, no R744 Main regulaion Subcooling regulaion Auxiliary refrigeran R744 The driver conrols refrigeran superhea in he primary circui (A), and a he same ime measures he refrigeran condensing pressure in he secondary circui (B). When he condensing emperaure exceeds he HiTCond proecion hreshold, normal superhea conrol is overridden by forced opening of he valve, a a rae ha is inversely proporional o he HiTCond proecion inegral ime. Opening he EEV lowers he superhea in he primary circui, which increases he hea exchange coefficien and consequenly reduces he condensing pressure in he secondary circui. The reverse HiTcond hreshold for CO 2 cascade applicaions should be se in relaion o he expeced evaporaion emperaure in he primary circui. The hreshold mus be se o a value ha is a leas 3-5 C higher han he minimum evaporaion emperaure in he primary circui. Lower values make achieving he se pressure limi incompaible wih hea exchange efficiency. In addiion, swings in operaion may occur due he aemp o limi low superhea in he primary circui and he pressure in he secondary circui a he same ime. 35

36 8. PARAMETERS TABLE user* Parameer/descripion Def. Min. Max. UOM CONFIGURATION A Nework address plan: I ohers: 198 A Refrigeran: R404A I = R22 2= R134a 3= R404A 4= R407C 5= R410A 6= R507A 7= R290 8= R600 9= R600a 10= R717 11= R744 12= R728 13= R = R417A 15= R422D 16= R413A 17= R422A 18= R423A 19= R407A 20= R427A 21= R245FA 22= R407F 23=R32 24=HTR01 25=HTR02 A Valve: 1= CAREL E X V 2= Alco EX4 3= Alco EX5 4= Alco EX6 5= Alco EX7 6= Alco EX8 330Hz consigliaa CAREL 7= Alco EX8 500Hz specifica Alco 8= Sporlan SEI = Sporlan SER = Sporlan SEI 30 11= Sporlan SEI 50 12= Sporlan SEH = Sporlan SEH = Danfoss ETS B 15= Danfoss ETS 50B 16= Danfoss ETS 100B 17= Danfoss ETS = Danfoss ETS = Two CAREL E X V conneced ogeher 20= Sporlan SER(I)G,J,K 21= Danfoss CCM CAREL E X V I = Danfoss CCM 40 A Probe : A Raiomeric (OUT=0 o 5 V) Elecronic (OUT=4 o 20 ma) 1= -1 4,2 barg 8= -0,5 7 barg 2= -0,4 9,3 barg 9= 0 10 barg 3= -1 9,3 barg 10= 0 18,2 bar 4= 0 17,3 barg 11= 0 25 barg 5= 0,85 34,2 barg 12= 0 30 barg 6= 0 34,5 barg 13= 0 44,8 barg 7= 0 45 barg 14= remoe, -0,5 7 barg 15= remoe, 0 10 barg 16= remoe, 0 18,2 barg 17= remoe, 0 25 barg 18= remoe, 0 30 barg 19= remoe, 0 44,8 barg 20= 4 20 ma exernal signal Main conrol: 1= Cenralized cabine/cold room 2= Self conained cabine/cold room 3= Perurbaed cabine/conrol room 4= Subcriical CO 2 cabine/cold room 5= R404A condenser for subcriical CO 2 6= AC or chiller wih plae evaporaor 7= AC or chiller wih shell ube evaporaor 8= AC or chiller wih baery coil evaporaor 9= AC or chiller wih variable cooling capaciy 10= AC or chiller perurbaed uni 11= EPR Back pressure 12= Ho gas by-pass by pressure 13= Ho gas by-pass by emperaure 14= ranscriical CO 2 gas cooler 15= analog posiioner (4 o 20 ma) 16= analog posiioner (0 o10 V) 17= AC/chiller or cabine/cold room wih adapaive regulaion 18= AC or chiller wih Digial Scroll compressor 19= AC/chiller wih BLDC compressor (*) 20= superhea regulaion wih 2 emperaure probes 21= I/O expander for pco (*)= only for conrols for CAREL valves Raiomeric: -1 o 9.3 barg Muliplexed cabine/cold room Type ** CAREL SVP Modbus I I Noes 36

37 user* Parameer/descripion Def. Min. Max. UOM A Probe : 1= CAREL NTC 2= CAREL NTC-HT high 3= combined NTC SPKP**T0 4= 0 o 10V exernal signal A Auxiliary conrol: 1= Disabled 2= high condensing emperaure proecion on S3 probe 3= modulaing hermosa on S4 probe 4= backup probes on S3 and S4 5, 6, 7 = Reserved 8= Subcooling measuremen 9= Inverse high condensaion emperaure proecion on S3 probe A Probe S3 Raiomeric (OUT=0 o 5 V) Elecronic (OUT=4 o 20 ma) 1= -1 4,2 barg 8= barg 2= -0,4 9,3 barg 9= 0 10 barg 3= -1 9,3 barg 10= 0 18,2 bar 4= 0 17,3 barg 11= 0 25 barg 5= 0,85 34,2 barg 12= 0 30 barg 6= 0 34,5 barg 13= 0 44,8 barg 7= 0 45 barg 14= remoo, -0,5 7 barg 15= remoo, 0 10 barg 16= remoo, 0 18,2 barg 17= remoo, 0 25 barg 18= remoo, 0 30 barg 19= remoo, 0 44,8 barg 20= segnale eserno (4 20 ma) (canno be seleced) 21= -1 o 12.8 barg 22= 0 o 20.7 barg 23= 1.86 o 43.0 barg A Relay configuraion: 1= Disabled 2= alarm relay (opened in case of alarm) 3= Solenoid valve relay (open in sandby) 4= valve + alarm relay (opened in sand-by and conrol alarms) 5= Reversed alarm relay (closed in case of alarm) 6= Valve saus relay (open if valve closed) A Probe S4: 1= CAREL NTC 2= CAREL NTC-HT high emperaure 3= NTC buil-in SPKP**T0 A DI2 configuraion: 1= Disabled 2= valve regulaion opimizaion afer defros 3= Baery alarm managemen 4= Valve forced open (a 100%) 5= Regulaion sar/sop 6= Regulaion backup 7= Regulaion securiy C Display main var. 1: 1= Valve opening 2= Valve posiion 3= Curren cool. capaciy 4= Conrol se poin 5= Superhea 6= Sucion emperaure 7= Evaporaion emperaure 8= Evaporaion pressure 9= Condensing emperaure 10= Condensing pressure 11= Modulaing hermosa emperaure 12= EPR pressure 13= Ho gas bypass pressure 14= Ho gas bypass emperaure 15= CO 2 gas cooler oule emperaure 16= CO 2 gas cooler oule pressure 17= CO 2 gas cooler pressure se poin 18= probe measuremen 19= probe measuremen 20= S3 probe measuremen 21= S4 probe measuremen 22= 4-20 ma inpu value 23= 0-10 V inpu value CAREL NTC I Disabled I Raiomeric: -1 o 9.3 barg Type ** CAREL SVP Modbus I Alarm relay I CAREL NTC I Disabiliao I Superhea I Noes 37

38 user* Parameer/descripion Def. Min. Max. UOM C Display main var. 2 (See display main var. 1) Valve opening I C probe alarm manag.: 1= No acion 2= Valve forced closed 3= Valve a fixed posi. 4= Use backup probe S3 Valve a fixed posiion I C C C probe alarm manag.: 1= No acion 2= Valve forced closed 3= Valve a fixed posi. 4= Use backup probe S4 S3 probe alarm manag.: 1= No acion 2= Valve forced closed 3= Valve a fixed posi. S3 probe alarm manag.: 1= No acion 2= Valve forced closed 3= Valve a fixed posi. Valve a fixed posiion Type ** CAREL SVP Modbus I No acion I No acion I C Uni of measure: C/K/barg; F/psig C(K), barg I A DI1 configuraion 1= Disabled 2= Valve regulaion opimizaion afer defros 3= Discharged baery alarm managemen 4= Valve forced open (a 100%) 5= Regulaion sar/sop 6= Regulaion backup 7= Regulaion securiy Regulaion sar/sop (LAN-RS485) / Regulaion backup (plan) I C Language: Ialian; English Ialian C Auxiliary refrigeran 0 = same as main regulaion I = R22 2= R134a 3= R404A 4= R407C 5= R410A 6= R507A 7= R290 8= R600 9= R600a 10= R717 11= R744 12= R728 13= R = R417A 15= R422D 16= R413A 17= R422A 18= R423A 19= R407A 20= R427A 21= R245FA 22= R407F 23= R32 24= HTR01 25= HTR02 PROBES C calibraion offse 0-60 (-870), (870), 60 barg (psig) A ma C calibra gain on 4-20 ma A C pressure MINIMUM value (-290) pressure MAXIMUM value barg (psig) A C pressure MAXIMUM value 9.3 pressure MI- 200 (2900) barg (psig) A NIMUM value C alarm MIN pressure (-290) alarm MAX barg (psig) A pressure C alarm MAX pressure 9.3 alarm MIN 200 (2900) barg (psig) A pressure C calibraion offse 0-20 (-36), (36), 20 C ( F), vol A C alarm MIN empera alarm MAX C( F) A emp. C alarm MAX empera 105 alarm MIN 200 (392) C( F) A emp. C S3 calibra offse 0-60 (-870) 60 (870) barg (psig) A C S3 calibraion gain on 4 o 20 ma (canno be seleced) A C S3 pressure MINIMUM value (-290) S3 pressure MAXIMUM value barg (psig) A C S3 pressure MAXIMUM value 9.3 S3 pressure MI- 200 (2900) barg (psig) A NIMUM value C S3 alarm MIN pressure (-290) S3 alarm MAX barg (psig) A pressure C S3 probe alarm MAX pressure 9.3 S3 alarm MIN 200 (2900) barg (psig) A pressure C S4 calibra. offse 0-20 (-36) 20 (36) C ( F) A C S4 alarm MIN empera (-76) S4 alarm MAX C ( F) A emp. C S4 alarm MAX empera. 105 S4 alarm MIN 200 (392) C ( F) A emp. CONTROL A Superhea se poin 11 LowSH: hreshold 180 (324) K( R) A A Valve opening a sar-up % I C Valve opened in sandby (0=disabled=valve closed; 1=enabled = valve open according o parameer Valve posiion in sand-by ) D Noes 38

39 user* Parameer/descripion Def. Min. Max. UOM C Valve posiion in sand-by % I = 25% 1 100% = % opening C sar-up delay afer defros min I A Pre-posiion ime s I A Ho gas bypass emperaure se poin (-76) 200 (392) C ( F) A A Ho gas bypass pressure se poin 3-20 (-290) 200 (2900) barg (psig) A A EPR pressure se poin (-290) 200 (2900) barg (psig) A C PID proporional gain A C PID inegral ime s I C PID derivaive ime s A A LowSH proecion hreshold 5-40 (-72) superhea se K( F) A poin C LowSH proecion inegral ime s A A LOP proecion hreshold (-76) MOP proecion C ( F) A hreshold C LOP proecion inegral ime s A A MOP proecion hreshold 50 LOP proecion 200 (392) C ( F) A hreshold C MOP proecion inegral ime s A A Enable manual valve posiion D A Manual valve posiion sep I C Discharge superhea sepoin 35-40(-72) 180 (324) K (F ) A C Discharge emperaure sepoin (-76) 200 (392) C ( F) A ADVANCED A High Tcond hreshold (-76) 200 (392) C ( F) A C High Tcond inegral ime s A A Modul hermos sepoin 0-60 (-76) 200 (392) C ( F) A A Modul hermos differenial 0, (0.2) 100 (180) C ( F) A C Modul hermos SHse offse 0 0 (0) 100 (180) K ( F) A C CO 2 regul. 'A' coefficien A C CO 2 regul. 'B' coefficien A C Sar manual uning 0 = no; 1= yes D C Tuning mehod I = auomaic selecion = manual selecion =no acceped 255= PID parameers idenified model C Nework seings bi/s I CO 0= 4800; 1= 9600; 2= A Power supply mode D = 24 Vac; 1= 24 Vdc C Enable mode single on win (parameer disabled) D = Twin; 1= Single C Sop manual posiioning if ne error D = Normal operaion; 1 = Sop ALARM CONFIGURATION C Low superhea alarm imeou (LowSH) s I (0= alarm DISABLED) C Low evap emp alarm imeou (LOP) s I (0= alarm DISABLED) C High evap emp alarm imeou (MOP) s I (0= alarm DISABLED) C High cond emp alarm imeou (High Tcond) s I (0= alarm DISABLED) C Low sucion emperaure alarm hreshold (-76) 200 (392) C( F) A C Low suc emp alarm imeou s I (0= alarm DISABLED) VALVE C EEV minimum seps sep I C EEV maximum seps sep I C EEV closing seps sep I C EEV nominal sep rae sep/s I C EEV nominal curren ma I C EEV holding curren ma I C EEV duy cycle % I C EEV opening synchroniz D C EEV closing synchroniz D * User: A= Service (insaller), C= Manufacurer. **Type of variable: A= analogue, D= digial, I= ineger Type ** CAREL SVP Modbus Noes Tab. 8.a 39

40 8.1 Uni of measure In he configuraion parameers menu, wih access by manufacurer password, he user can choose he uni of measure for he driver: inernaional sysem ( C, K, barg); imperial sysem ( F, psig). Imporan: he drivers EVD evoluion-plan (code EVD000E1* and EVD0000E4*), conneced in plan o a pco conroller, do no manage he change of he uni of measure. Noe: he uni of measure K relae o degrees Kelvin adoped for measuring he superhea and he relaed parameers. When changing he uni of measure, all he values of he parameers saved on he driver and all he measuremens read by he probes will be recalculaed. This means ha when changing he unis of measure, conrol remains unalered. Example 1: The pressure read is 100 barg, his will be immediaely convered o he corresponding value of 1450 psig. Example 2: The superhea se poin parameer se o 10 K will be immediaely convered o he corresponding value of 18 F. Example 3: The S4 alarm MAX emp. parameer, se o 150 C, will be immediaely convered o he corresponding value of 302 F Noe: due o limis in he inernal arihmeic of he driver, pressure values above 200 barg (2900 psig) and emperaure values above 200 C (392 F) canno be convered. 40

41 8.2 Variables accessible via serial connecion ALARMS PROTECT. ACTIVATED ALARMS AL. Descripion Defaul Min Max Type CAREL SVP Modbus R/W Probe reading 0-20 (-290) 200 (2900) A 1 0 R Probe reading 0-60 (-870) 200 (2900) A 2 1 R Probe S3 reading 0-20 (-290) 200 (2900) A 3 2 R Probe S4 reading 0-60 (-76) 200 (392) A 4 3 R Sucion emperaure 0-60 (-76) 200 (392) A 5 4 R Evaporaion emperaure 0-60 (-76) 200 (392) A 6 5 R Evaporaion pressure 0-20 (-290) 200 (2900) A 7 6 R Ho gas bypass emperaure 0-60 (-76) 200 (392) A 8 7 R EPR pressure (back pressure) 0-20 (-290) 200 (2900) A 9 8 R Superhea 0-40 (-72) 180 (324) A 10 9 R Condensing pressure 0-20 (-290) 200 (2900) A R Condensing emperaure 0-60 (-76) 200 (392) A R Modulaing hermosa emperaure 0-60 (-76) 200 (392) A R Ho gas bypass pressure 0-20 (-290) 200 (2900) A R CO 2 gas cooler oule pressure 0-20 (-290) 200 (2900) A R CO 2 gas cooler oule emperaure 0-60 (-76) 200 (392) A R Valve opening A R CO 2 gas cooler pressure se poin 0-20 (-290) 200 (2900) A R 4-20 ma inpu value A R 0-10 V inpu value A R Conrol se poin 0-60 (-870) 200 (2900) A R Driver firmware version A R MOP: MOP proecion: sucion emperaure hreshold () (-76) 200(392) A R/W Discharge superhea 0-40(-72) 180(324) A R Discharge emperaure 0-60(-76) 200(392) A R Thermal ime consan NTC probe S A R/W MOP: High evaporaion emperaure hreshold 50 LOP: hreshold 200 (392) A R/W Condensaion pressure for subcooling measure 0-20(-290) 200(2900) A R Condensaion bubble poin 0-60(-76) 200(392) A R Condensaion liquid emperaure 0-60(-76) 200(392) A R Subcooling 0-40(-72) 180(324) A R Valve posiion I R Curren cooling capaciy I R/W Exended measured probe (*) (-2901) (29007) I R Exended measured probe S3 (*) (-2901) (29007) I R Valve emergency closing speed I R/W Conrol mode (BLDC comp.) I R/W Type of uni for serial comm I R HW code for serial comm I R LowSH proecion saus D R LOP proecion saus D R MOP proecion saus D R HiTCond proecion saus D R Low sucion emperaure D 1 0 R LAN error D 2 1 R EEPROM damaged D 3 2 R Probe D 4 3 R Probe D 5 4 R Probe S D 6 5 R Probe S D 7 6 R EEV moor error D 8 7 R Relay saus D 9 8 R LOP (low evaporaion emperaure) I R MOP high evaporaion emperaure) I R LowSH (low superhea) I R HiTcond (high condensing emperaure) I R ENG LOP (low evaporaion emperaure) D 10 9 R MOP (high evaporaion emperaure) D R LowSH (low superhea) D R High Tcond (high condensing emperaure) D R DI1 digial inpu saus D R DI2 digial inpu saus D R Guided iniial procedure compleed D R/W Adapive conrol ineffecive D R Mains power failure D R Conrol backup from supervisor D R/W Forced valve closing no compleed D R/W Tab. 8.b (*) The displayed variable is o be divided by 100, and allows us o appreciae he hundredh of a bar (psig). Type of variable: A= analogue, D= digial, I= ineger SVP= variable address wih CAREL proocol on 485 serial card. Modbus : variable address wih Modbus proocol on 485 serial card. 41

42 8.3 Variables used based on he ype of conrol The following able shows he variables used by he driver depending on he values of he Main conrol and Auxiliary conrol parameers. These variables can be shown on he display by accessing display mode (see paragraph 3.3 Display mode and via a serial connecion wih VPM, PlanVisorPRO, Proceed as follows o display he variables: press UP/DOWN; press he DOWN buon o move o he nex variable/screen; press Esc o reurn o he sandard display. Variable displayed Superhea conrol Auxiliary conrol HiTcond/ HiTcond inversa Modula. hermosa Misura sooraffreddameno Transcriical CO2 Main conrol Ho gas by-pass / emperaure Ho gas by-pass / pressure EPR back pressure AC or chiller wih Digial Scroll compr. AC/chiller wih BLDC compres. Superhea regulaion wih 2 emperaure probes Valve opening(%) Valve posiion (sep) Curren uni cooling capaciy Conrol sepoin Superhea Sucion emperaure Evaporaion emperaure Evaporaion pressure Condensing emperaure Condensing pressure Modulaing hermosa emperaure EPR pressure (back pressure) Ho gas bypass pressure Ho gas bypass emperaure CO 2 gas cooler oule emperaure CO 2 gas cooler oule pressure CO 2 gas cooler pressure se poin Condensaion pressure for subcooling measure (SBC) Condensaion Temperaure bubble for subcooling measure (SBC) Liquid emperaure for subcooling measure (SBC) Subcooling measuremen probe measuremen probe measuremen S3 probe measuremen S4 probe measuremen 4 o 20 ma inpu value 0 o 10 Vdc inpu value DI1 digial inpu saus (*) DI2 digial inpu saus (*) EVD firmware version Display firmware version Adapaive regulaion saus 0= No enabled or sopped 1= Monioring superhea 2= Monioring sucion emperaure 3= Wai superhea sabilisaion 4= Wai sucion emperaure sabilisaion 5= Applying sep 6= Posiioning valve 7= Sampling response o sep 8=Wai sabilisaion in response o sep 9= Wai uning improvemen 10= Sop, max aemps exceeded Las uning resul 0= No aemp performed 1= Aemp inerruped 2= Sep applicaion error 3= Time consan/delay error 4= Model error 5= Tuning ended successfully on sucion emperaure 6= Tuning ended successfully on superhea Discharge superhea Discharge emperaure (*) Digial inpu saus: 0= open, 1= closed. I/O expander for pco Tab. 8.c Noe: he readings of probes,, S3, S4 are always displayed, regardless of wheher or no he probe is conneced. 42

43 9. ALARMS 9.1 Alarms There are wo ypes of alarms: sysem: valve moor, EEPROM, probe and communicaion; conrol: low superhea, LOP, MOP, high condensing emperaure, low sucion emperaure. The acivaion of he alarms depends on he seing of he hreshold and acivaion delay (imeou) parameers. Seing he imeou o 0 disables he alarms. The EEPROM uni parameers and operaing parameers alarm always sops conrol. All he alarms are rese auomaically, once he causes are no longer presen. The alarm relay conac will open if he relay is configured as alarm relay using he corresponding parameer. The signalling of he alarm even on he driver depends on wheher he LED board or he display board is fied, as shown in he able below. Noe: he alarm LED only comes on for he sysem alarms, and no for he conrol alarms. Example: display sysem alarm on LED board: EVD evoluion The display shows boh ypes of alarms, in wo differen modes: sysem alarm: on he main page, he ALARM message is displayed, flashing. Pressing he Help buon displays he descripion of he alarm and, a he op righ, he oal number of acive alarms. Fig. 9.b conrol alarm: nex o he flashing ALARM message, he main page shows he ype of proecor acivaed. Fig. 9.c Fig. 9.a Noe: he alarm LED comes on o signal a mains power failure only if he EVBAT*** module (accessory) has been conneced, guaraneeing he power required o close he valve. Noe: o display he alarm queue, press he Help buon and scroll using he UP/DOWN buons; he conrol alarms can be disabled by seing he corresponding imeou o zero. Table of alarms Probe Probe S3 Probe S4 (LowSH) low superhea (LOP) low evaporaion emperaure (MOP) high evaporaion emperaure (High Tcond) high conden emperaure Low sucion emperaure Probe fauly or exceeded se alarm range Probe S3 fauly or exceeded se alarm range Probe S4 fauly or exceeded se alarm range LowSH proecion acivaed LOP proecion acivaed MOP proecion acivaed High Tcond proecion acivaed Threshold and imeou exceeded EEPROM damaged EEPROM for operaing and/or uni parameers damaged red alarm LED red alarm LED red alarm LED ALARM flashing ALARM flashing ALARM flashing - ALARM & LowSH flashing - ALARM & LOP flashing - ALARM & MOP flashing - ALARM & MOP flashing Depends on configuraion parameer Depends on configuraion parameer Depends on configuraion parameer Depends on configuraion parameer Depends on configuraion parameer Depends on configuraion parameer Depends on configuraion parameer - ALARM flashing Depends on configuraion parameer red alarm LED ALARM flashing Depends on configuraion parameer 43 auomaic auomaic auomaic auomaic auomaic auomaic auomaic Depends on parameer probe alarm manag. Depends on parameer S3 probe alarm manag. Depends on parameer S4 probe alarm manag. Proecion acion already acive Proecion acion already acive Proecion acion already acive Proecion acion already acive Type of alarm Cause of alarm LED Display Relay Rese Effec on conrol Checks/ soluions Probe Probe fauly red alarm ALARM flashing Depends on auomaic Depends on parameer Check he probe connecions. Check or exceeded se alarm range LED configuraion parameer probe alarm manag. he probe alarm manag., and alarm MIN & MAX pressure parameers Check he probe connecions. Check he probe alarm manag., and alarm MIN & MAX emperaure parameers Check he probe connecions. Check he S3 probe alarm manag., and S3 alarm MIN & MAX pressure parameers Check he probe connecions. Check he S4 probe alarm manag., and S4 alarm MIN & MAX emperaure parameers Check he LowSH alarm hreshold and imeou parameers Check he LOP alarm hreshold and imeou parameers Check he MOP alarm hreshold and imeou parameers Check he Hicond alarm hreshold and imeou parameers auomaic No effec Check he hreshold and imeou parameers. Replace driver/conac service Toal shudown Replace he driver/conac service

44 Type of alarm Cause of alarm LED Display Relay Rese Effec on conrol Checks/ soluions EEV moor error Valve moor faul, red alarm ALARM flashing Depends on auomaic Inerrupion Check he connecions and he condiion no conneced LED configuraion of he moor LAN error Display connecion error Adapive conrol ineffecive Baery discharged (**) Wrong power supply mode (*) LAN nework communicaion error LAN nework connecion error No communicaion beween driver and display green NET LED flashing NET LED off ALARM flashing ALARM flashing parameer Depends on configuraion parameer Depends on configuraion parameer auomaic auomaic Conrol based on DI1/DI2 Conrol based on DI1/DI2 - Error message No change replace he No effec driver/display Swich driver off and on again Check he nework address seings Check he connecions and ha he pco is on and working Check he driver/display and he connecors Tuning failed - ALARM flashing No change auomaic No effec Change Main conrol parameer seing Baery discharged red alarm Alarm flashing No change replace he No effec If he alarm persiss for more han 3 or fauly or elecrical LED baery hours (recharge ime for EVBAT00500) connecion flashing replace he baery inerruped DC driver power supply wih Power supply mode parameer se o AC power supply Green POWER LED flashingred alarm LED - Depends on he configuraion parameer Change Toal shudown Power supply mode parameer seing (*) In he even of AC power supply wih he Power supply mode parameer se o DC no alarm is displayed (**) Alarm only visible if driver conneced o EVDBAT00400 baery module and digial inpu configured accordingly. Check he Power supply mode parameer and power supply Tab. 9.d 9.2 Alarm relay configuraion The relay conac is open when he driver is no powered. During normal operaion, i can be disabled (and hus will be always open) or configured as: alarm relay: during normal operaion, he relay conac is closed, and opens when any alarm is acivaed. I can be used o swich off he compressor and he sysem in he even of alarms. solenoid valve relay: during normal operaion, he relay conac is closed, and is open only in sandby. There is no change in he even of alarms. solenoid valve relay + alarm: during normal operaion, he relay conac is closed, and opens in sandby and/or for LowSH, MOP, High Tcond and low sucion emperaure alarms. This is because following such alarms, he user may wan o proec he uni by sopping he flow of refrigeran or swiching off he compressor. The LOP alarm is excluded, as in he even of low evaporaion emperaure closing he solenoid valve would worsen he siuaion. Parameer/descripion Relay configuraion: 1=Disabled 2=alarm relay (opened in case of alarm) 3=Solenoid valve relay (open in sandby) 4=valve + alarm relay (opened in sand-by and conrol alarms) 5= Reversed alarm relay (closed in case of alarm) 6= Valve saus relay (open if valve is closed) Def. Alarm relay Tab. 9.e 9.3 Probe alarms The probe alarms are par of he sysem alarms. When he value measured by one of he probes is ouside of he field defined by he parameers corresponding o he alarm limis, an alarm is acivaed. The limis can be se independenly of he range of measuremen. Consequenly, he field ouside of which he alarm is signalled can be resriced, o ensure greaer safey of he conrolled uni. Noe: he alarm limis can also be se ouside of he range of measuremen, o avoid unwaned probe alarms. In his case, he correc operaion of he uni or he correc signalling of alarms will no be guaraneed; by defaul, afer having seleced he ype of probe used, he alarm limis will be auomaically se o he limis corresponding o he range of measuremen of he probe. Parameer/descripion Def. Min. Max. UOM PROBESs alarm MIN pressure (_AL_MIN) (-290) _AL_MAX barg (psig) alarm MAX pressure (_AL_MAX) 9.3 _AL_MIN 200 (2900) barg (psig) alarm MIN emp. (_AL_MIN) _AL_MAX C/ F alarm MAX emp. (_AL_MAX) 105 _AL_MIN 200 (392) C ( F) S3 alarm MIN pressure (S3_AL_MIN) S3_AL_MAX barg (psig) S3 alarm MAX pressure (S3_AL_MAX) 9.3 S3_AL_MIN 200 (2900) barg (psig) S4 alarm MIN emp. (S4_AL_MIN) S4_AL_MAX C/ F S4 alarm MAX emp. (S4_AL_MAX) 105 S4_AL_MIN 200 (392) C ( F) Tab. 9.f The behaviour of he driver in response o probe alarms can be configured, using he manufacurer parameers. The opions are: no acion (conrol coninues bu he correc measuremen of he variables is no guaraneed); forced closing of he valve (conrol sopped); valve forced o he iniial posiion (conrol sopped); use he backup probe (valid only for probe and alarms, conrol coninues). 44

45 Parameer/descripion CONFIGURATION probe alarm manag.: 1=No acion 2=Valve forced closed 3=Valve a fixed posiion 4=Use backup probe S3 probe alarm manag.: 1=No acion 2=Valve forced closed 3=Valve a fixed posiion 4=Use backup probe S4 S3 probe alarm manag.: 1=No acion 2=Valve forced closed 3=Valve a fixed posiion S4 probe alarm manag.: 1=No acion 2=Valve forced closed 3=Valve a fixed posiion CONTROL Valve opening a sar-up (evaporaor/valve capaciy raio) Def. Valve a fixed posiion Valve a fixed posiion No acion No acion 9.4 Conrol alarms These are alarms ha are only acivaed during regulaion. 50 Tab. 9.g Proecor alarms The alarms corresponding o he LowSH, LOP, MOP and High Tcond proecors are only acivaed during conrol when he corresponding acivaion hreshold is exceeded, and only when he imeou defined by he corresponding parameer has elapsed. If a proecor is no enabled (inegraion ime= 0 s), no alarm will be signalled. If before he expiry of he imeou, he proecor conrol variable reurns back inside he corresponding hreshold, no alarm will be signalled. Noe: his is a likely even, as during he imeou, he proecion funcion will have an effec. If he imeou relaing o he conrol alarms is se o 0 s, he alarm is disabled. The proecors are sill acive, however. The alarms are rese auomaically. Low sucion emperaure alarm The low sucion emperaure alarm is no linked o any proecion funcion. I feaures a hreshold and a imeou, and is useful in he even of probe or valve malfuncions o proec he compressor using he relay o conrol he solenoid valve or o simply signal a possible risk. In fac, he incorrec measuremen of he evaporaion pressure or incorrec configuraion of he ype of refrigeran may mean he superhea calculaed is much higher han he acual value, causing an incorrec and excessive opening of he valve. A low sucion emperaure measuremen may in his case indicae he probable flooding of he compressor, wih corresponding alarm signal. If he alarm imeou is se o 0 s, he alarm is disabled. The alarm is rese auomaically, wih a fixed differenial of 3 C above he acivaion hreshold. Relay acivaion for conrol alarms As menioned in he paragraph on he configuraion of he relay, in he even of LowSH, MOP, High Tcond and low sucion emperaure alarms, he driver relay will open boh when configured as an alarm relay and configured as a solenoid + alarm relay. In he even of LOP alarms, he driver relay will only open if configured as an alarm relay. Parameer/descripion Def. Min. Max. UOM CONTROL LowSH proecion hreshold 5-40 (-72) superhea K ( F) se poin LowSH proecion inegraion ime s LOP proecion hreshold (-76) MOP hreshold C ( F) LOP proecion inegraion ime s MOP proecion hreshold 50 LOP hreshold. 200 (392) C ( F) MOP proecion inegraion ime s ADVANCED High Tcond hreshold (-76) 200 (392) C ( F) High Tcond inegraion ime s ALARM CONFIGURATION Low superhea alarm imeou s (LowSH) (0= alarm DISABLED) Low evaporaion emperaure alarm imeou (LOP) (0= alarm DISABLED) s High evaporaion emperaure alarm s imeou (MOP) (0= alarm DISABLED) High condensing emperaure alarm s imeou (High Tcond) (0= alarm DISABLED) Low sucion emperaure alarm (-76) 200 (392) C ( F) hreshold Low sucion emperaure alarm imeou s Tab. 9.h 9.5 EEV moor alarm A he end of he commissioning procedure and whenever he driver is powered up, he valve moor error recogniion procedure is acivaed. This preceded he forced closing procedure and lass around 10 s. The valve is kep saionary o allow any valve moor fauls or missing or incorrec connecions o be deeced. In any of hese cases, he corresponding alarm is acivaed, wih auomaic rese. The driver will go ino wai saus, as i can longer conrol he valve. The procedure can be avoided by keeping he respecive digial inpu closed for each driver. In his case, afer having powered up he driver, forced closing of he valve is performed immediaely. Imporan: afer having resolved he problem wih he moor, i is recommended o swich he driver off and on again o realign he posiion of he valve. If his is no possible, he auomaic procedure for synchronising he posiion may help solve he problem, noneheless correc regulaion will no be guaraneed unil he nex synchronisaion. 9.6 LAN error alarm Noe: in he even of LAN error, a parameer can be se o disable Manual posiioning. If he connecion o he LAN nework is offline for more han 6s due o an elecrical problem, he incorrec configuraion of he nework addresses or he malfuncion of he pco conroller, a LAN error alarm will be signalled. The LAN error affecs he conrol of he driver as follows: case 1: uni in sandby, digial inpu DI1/DI2 disconneced; he driver will remain permanenly in sandby and conrol will no be able o sar; case 2: uni in conrol, digial inpu DI1/DI2 disconneced: he driver will sop conrol and will go permanenly ino sandby; case 3: uni in sandby, digial inpu DI1/DI2 conneced: he driver will remain in sandby, however conrol will be able o sar if he digial inpu is closed. In his case, i will sar wih curren cooling capaciy = 100%; case 4: uni in conrol, digial inpu DI1/DI2 conneced: he driver will remain in conrol saus, mainaining he value of he curren cooling capaciy. If he digial inpu opens, he driver will go o sandby and conrol will be able o sar again when he inpu closes. In his case, i will sar wih curren cooling capaciy = 100% 45

46 The following able liss a series of possible malfuncions ha may occur when saring and operaing he driver and he elecronic valve. These cover he mos common problems and are provided wih he aim of offering an iniial response for resolving he problem. 10. TROUBLESHOOTING PROBLEM CAUSE SOLUTION The superhea value measured is incorrec The probe does no measure correc values Check ha he pressure and he emperaure measured are correc and ha he probe posiion is correc. Check ha he minimum and maximum pressure parameers for he pressure ransducer se on he driver correspond o he range of he pressure probe insalled. Check he correc probe elecrical connecions. Liquid reurns o he compressor during conrol Liquid reurns o he compressor only afer defrosing (for muliplexed cabines only) Liquid reurns o he compressor only when saring he conroller (afer being OFF) The superhea value swings around he se poin wih an ampliude greaer han 4 C In he sar-up phase wih high evaporaor emperaures, he evaporaion pressure is high The ype of refrigeran se is incorrec The ype of valve se is incorrec The valve is conneced incorrecly (roaes in reverse) and is open The superhea se poin is oo low Low superhea proecion ineffecive Saor broken or conneced incorrecly Valve suck open The valve opening a sar-up parameer is oo high on many cabines in which he conrol se poin is ofen reached (for muliplexed cabines only) The pause in conrol afer defrosing is oo shor The superhea emperaure measured by he driver afer defrosing and before reaching operaing condiions is very low for a few minues The superhea emperaure measured by he driver does no reach low values, bu here is sill reurn of liquid o he compressor rack Many cabines defrosing a he same ime The valve is significanly oversized The valve opening a sar-up parameer is se oo high The condensing pressure swings The superhea swings even wih he valve se in manual conrol (in he posiion corresponding o he average of he working values) The superhea does NOT swing wih he valve se in manual conrol (in he posiion corresponding o he average of he working values) The superhea se poin is oo low MOP proecion disabled or ineffecive Refrigeran charge excessive for he sysem or exreme ransiory condiions a sar-up (for cabines only). Check and correc he ype of refrigeran parameer. Check and correc he ype of valve parameer. Check he movemen of he valve by placing i in manual conrol and closing or opening i compleely. One complee opening mus bring a decrease in he superhea and vice-versa. If he movemen is reversed, check he elecrical connecions. Increase he superhea se poin. Iniially se i o 12 C and check ha here is no longer reurn of liquid. Then gradually reduce he se poin, always making sure here is no reurn of liquid. If he superhea remains low for oo long wih he valve ha is slow o close, increase he low superhea hreshold and/or decrease he low superhea inegraion ime. Iniially se he hreshold 3 C below he superhea se poin, wih an inegraion ime of 3-4 seconds. Then gradually lower he low superhea hreshold and increase he low superhea inegraion ime, checking ha here is no reurn of liquid in any operaing condiions. Disconnec he saor from he valve and he cable and measure he resisance of he windings using an ordinary eser. The resisance of boh should be around 36 ohms. Oherwise replace he saor. Finally, check he elecrical connecions of he cable o he driver. Check if he superheaing is always low (<2 C) wih he valve posiion permanenly a 0 seps. If so, se he valve o manual conrol and close i compleely. If he superhea is always low, check he elecrical connecions and/or replace he valve. Decrease he value of he Valve opening a sar-up parameer on all he uiliies, making sure ha here are no repercussions on he conrol emperaure. Increase he value of he valve conrol delay afer defrosing parameer. Check ha he LowSH hreshold is greaer han he superhea value measured and ha he corresponding proecion is acivaed (inegraion ime >0 s). If necessary, decrease he value of he inegraion ime. Se more reacive parameers o bring forward he closing of he valve: increase he proporional facor o 30, increase he inegraion ime o 250 s and increase he derivaive ime o 10 sec. Sagger he sar defros imes. If his is no possible, if he condiions in he previous wo poins are no presen, increase he superhea se poin and he LowSH hresholds by a leas 2 C on he cabines involved. Replace he valve wih a smaller equivalen. Check he calculaion in reference o he raio beween he raed cooling capaciy of he evaporaor and he capaciy of he valve; if necessary, lower he value. Check he conroller condenser seings, giving he parameers blander values (e.g. increase he proporional band or increase he inegraion ime). Noe: he required sabiliy involves a variaion wihin +/- 0.5 bars. If his is no effecive or he seings canno be changed, adop elecronic valve conrol parameers for perurbed sysems Check for he causes of he swings (e.g. low refrigeran charge) and resolve where possible. If no possible, adop elecronic valve conrol parameers for perurbed sysems. As a firs approach, decrease (by 30 o 50 %) he proporional facor. Subsequenly ry increasing he inegraion ime by he same percenage. In any case, adop parameer seings recommended for sable sysems. Increase he superhea se poin and check ha he swings are reduced or disappear. Iniially se 13 C, hen gradually reduce he se poin, making sure he sysem does no sar swinging again and ha he uni emperaure reaches he conrol se poin. Acivae he MOP proecion by seing he hreshold o he required sauraed evaporaion emperaure (high evaporaion emperaure limi for he compressors) and seing he MOP inegraion ime o a value above 0 (recommended 4 seconds). To make he proecion more reacive, decrease he MOP inegraion ime. Apply a sof sar echnique, acivaing he uiliies one a a ime or in small groups. If his is no possible, decrease he values of he MOP hresholds on all he uiliies. 46

47 PROBLEM CAUSE SOLUTION In he sar-up phase he low pressure proecion The Valve opening a sar-up parameer is se oo low Check he calculaion in reference o he raio beween he raed cooling capaciy of he evaporaor and he capaciy of he valve; if necessary lower he value. is acivaed (only for selfconained unis) The driver in plan or LAN configuraion does no sar conrol and he valve Check he plan / LAN connecions. Check ha he pco applicaion conneced o he driver (where feaured) correcly manages he driver sar signal. Check ha he driver The uni swiches off due o low pressure during conrol (only for self-conained unis) remains closed The driver in sand-alone configuraion does no sar conrol and he valve remains closed is NOT in sand-alone mode. Check he connecion of he digial inpu. Check ha when he conrol signal is sen ha he inpu is closed correcly. Check ha he driver is in sand-alone mode. LOP proecion disabled Se a LOP inegraion ime greaer han 0 s. LOP proecion ineffecive Solenoid blocked Insufficien refrigeran The valve is conneced incorrecly (roaes in reverse) and is open Saor broken or conneced incorrecly Make sure ha he LOP proecion hreshold is a he required sauraed evaporaion emperaure (beween he raed evaporaion emperaure of he uni and he corresponding emperaure a he calibraion of he low pressure swich) and decrease he value of he LOP inegraion ime. Check ha he solenoid opens correcly, check he elecrical connecions and he operaion of he relay. Check ha here are no bubbles in he sigh glass upsream of he expansion valve. Check ha he subcooling is suiable (greaer han 5 C); oherwise charge he circui. Check he movemen of he valve by placing i in manual conrol and closing or opening i compleely. One complee opening mus bring a decrease in he superhea and vice-versa. If he movemen is reversed, check he elecrical connecions. Disconnec he saor from he valve and he cable and measure he resisance of he windings using an ordinary eser. The resisance of boh should be around 36 ohms. Oherwise replace he saor. Finally, check he elecrical connecions of he cable o he driver (see paragraph 5.1). Valve suck closed Use manual conrol afer sar-up o compleely open he valve. If he superhea remains high, check he elecrical connecions and/or replace he valve. LOP proecion disabled Se a LOP inegraion ime greaer han 0 s. LOP proecion ineffecive Make sure ha he LOP proecion hreshold is a he required sauraed evaporaion emperaure (beween he raed evaporaion emperaure of he uni and he corresponding emperaure a he calibraion of he low pressure swich) and decrease he value of he LOP inegraion ime. Solenoid blocked Insufficien refrigeran The valve is significanly undersized Saor broken or conneced incorrecly Valve suck closed The cabine does no reach Solenoid blocked he se emperaure, despie he value being opened o Insufficien refrigeran he maximum (for muliplexed cabines only) The valve is significanly undersized Saor broken or conneced incorrecly The cabine does no reach he se emperaure, and he posiion of he valve is always 0 (for muliplexed cabines only) Valve suck closed The driver in plan or LAN configuraion does no sar conrol and he valve remains closed The driver in sand-alone configuraion does no sar conrol and he valve remains closed Check ha he solenoid opens correcly, check he elecrical connecions and he operaion of he conrol relay. Check ha here are no bubbles of air in he liquid indicaor upsream of he expansion valve. Check ha he subcooling is suiable (greaer han 5 C); oherwise charge he circui. Replace he valve wih a larger equivalen. Disconnec he saor from he valve and he cable and measure he resisance of he windings using an ordinary eser. The resisance of boh should be around 36 ohms. Oherwise replace he saor. Finally, check he elecrical connecions of he cable o he driver. Use manual conrol afer sar-up o compleely open he valve. If he superhea remains high, check he elecrical connecions and/or replace he valve. Check ha he solenoid opens correcly, check he elecrical connecions and he operaion of he relay. Check ha here are no bubbles of air in he liquid indicaor upsream of he expansion valve. Check ha he subcooling is suiable (greaer han 5 C); oherwise charge he circui. Replace he valve wih a larger equivalen. Disconnec he saor from he valve and he cable and measure he resisance of he windings using an ordinary eser. The resisance of boh should be around 36 ohms. Oherwise replace he saor. Finally, check he elecrical connecions of he cable o he driver. Use manual conrol afer sar-up o compleely open he valve. If he superhea remains high, check he elecrical connecions and/or replace he valve. Check he plan/lan connecions. Check ha he pco applicaion conneced o he driver (where feaured) correcly manages he driver sar signal. Check ha he driver is NOT in sand-alone mode. Check he connecion of he digial inpu. Check ha when he conrol signal is sen ha he inpu is closed correcly. Check ha he driver is in sand-alone mode. Tab. 10.a 47

48 11. TECHNICAL SPECIFICATIONS Power supply 24 Vac (+10/-15%) o be proeced by exernal 2 A ype T fuse. (Lmax= 5 m) 24 Vdc (+10/-15%) 50/60 Hz o be proeced by exernal 2 A ype T fuse. Use a dedicaed class 2 ransformer (max 100 VA). Power inpu 16.2 W wih ALCO EX7/EX8 valves, 9.2 W wih all oher valves 35 VA wih EVBAT00400; 35 VA wih ALCO EX7/EX8 valves; 20 VA wihou EVBAT00400 and wih all oher valves Emergency power supply 22 Vdc+/-5%. (If he opional EVBAT00200/300 module is insalled), Lmax= 5 m Insulaion beween relay oupu and reinforced; 6 mm in air, 8 mm on surface; 3750 V insulaion oher oupus Moor connecion 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 Digial inpu connecion Digial inpu o be acivaed from volage-free conac or ransisor o GND. Closing curren 5 ma; Lmax= 30 m Probes (Lmax=10 m; less han 30 m wih shielded cable) raiomeric pressure probe (0 o 5 V): resoluion 0.1 % FS; measuremen error: 2% FS maximum; 1% ypical elecronic pressure probe (4 o 20 ma): resoluion 0.5 % FS; measuremen error: 8% FS maximum; 7% ypical remoe elecronic pressure probe(4 o 20 ma), maximum number of drivers conneced= 5: resoluion 0.1 % FS; measuremen error: 2 % FS maximum; 1 % ypical 4 o 20 ma inpu (max 24 ma): resoluion 0.5 % FS; measuremen error: 8% FS maximum; 7% ypical low emperaure NTC: 10kΩ a 25 C, -50T90 C; measuremen error: 1 C in he range -50T50 C; 3 C in he range +50T90 C high emperaure NTC: 50kΩ a 25 C, -40T150 C; measuremen error: 1.5 C in he range -20T115 C, 4 C in he range ouside of -20T115 C NTC buil-in: 10kΩ a 25 C, -40T120 C; measuremen error: 1 C in he range -40T50 C; 3 C in he range +50T90 C 0 o 10 V inpu (max 12 V): resoluion 0.1 % FS; measuremen error: 9% FS maximum; 8% ypical S3 raiomeric pressure probe (0 o 5 V): resoluion 0.1 % FS; measuremen error: 2% FS maximum; 1% ypical elecronic pressure probe (4 o 20 ma): resoluion 0.5 % FS; measuremen error: 8% FS maximum; 7% ypical elecronic pressure probe (4 o 20 ma) remoe. Maximum number of conrollers conneced=5 combined raiomeric pressure probe (0 o 5 V): resoluion 0.1 % FS measuremen error: 2 % FS maximum; 1 % ypical S4 low emperaure NTC: 10kΩ a 25 C, -50T105 C; measuremen error: 1 C in he range -50T50 C; 3 C in he range 50T90 C high emperaure NTC: 50kΩ a 25 C, -40T150 C; measuremen error: 1.5 C in he range -20T115 C 4 C in he range ouside of -20T115 C NTC buil-in: 10kΩ a 25 C, -40T120 C; measuremen error 1 C in he range -40T50 C; 3 C in he range +50T90 C Relay oupu normally open conac; 5 A, 250 Vac resisive load; 2 A, 250 Vac inducive load (PF=0.4); Lmax=10 m; VDE: 1(1)A PF=0.6 Power o acive probes (V REF ) programmable oupu: +5 Vdc+/-2% or 12 Vdc+/-10% RS485 serial connecion Lmax=1000 m, shielded cable LAN connecion Lmax=30 m, shielded cable plan connecion Lmax=500 m, shielded cable Assembly DIN rail Connecors plug-in, cable size 0.5 o 2.5 mm 2 (12 o 20 AWG) Dimensions LxHxW= 70x110x60 Operaing condiions -25T60 C (don use EVDIS* under -20 C); <90% RH non-condensing Sorage condiions -35T60 C (don sore EVDIS* under -30 C), humidiy 90% RH non-condensing Index of proecor IP20 Environmenal polluion 2 (normal) Resisance o hea and fire Caegory D Immuniy agains volage surges Caegory 1 Raed impulse volage 2500V Type of relay acion 1C microswiching Class of insulaion II Sofware class and srucure A Conformiy Elecrical safey: EN , EN , VDE Elecromagneic compaibiliy: EN , EN , EN , EN ; EN , EN , EN , EN Tab. 11.a 48

49 12. APPENDIX: VPM (VISUAL PARAMETER MANAGER) 12.1 Insallaion On he hp://ksa.carel.com websie, under he Parameric Conroller Sofware secion, selec Visual Parameer Manager. A window opens, allowing 3 files o be downloaded: 1. VPM_CD.zip: for burning o a CD; 2. Upgrade seup; 3. Full seup: he complee program. For firs insallaions, selec Full seup, for upgrades selec Upgrade seup. The program is insalled auomaically, by running seup.exe. Noe: if deciding o perform he complee insallaion (Full seup), firs uninsall any previous versions of VPM Programming (VPM) When opening he program, he user needs o choose he device being configured: EVD evoluion. The Home page hen opens, wih he choice o creae a new projec or open an exising projec. Choose new projec and ener he password, which when accessed he firs ime can be se by he user. Fig. 12.c 5. selec he model from he range and creae a new projec or choose an exising projec: selec Device model. A new projec can be creaed, making he changes and hen connecing laer on o ransfer he configuraion (OFFLINE mode). Ener a he Service or Manufacurer level. selec Device model and ener he corresponding code Fig. 12.a Then he user can choose o: 4. direcly access o he lis of parameers for he EVD evoluion saved o EEPROM: selec LAN ; This is done in real ime (ONLINE mode), a he op righ se he nework address 198 and choose he guided recogniion procedure for he USB communicaion por. Ener a he Service or Manufacurer level. Fig. 12.d go o Configure device: he lis of parameers will be displayed, allowing he changes relaing o he applicaion o be made. Fig. 12.e Fig. 12.b A he end of he configuraion, o save he projec choose he following command, used o save he configuraion as a file wih he.hex exension. File -> Save parameer lis. To ransfer he parameers o he driver, choose he Wrie command. During he wrie procedure, he 2 LEDs on he converer will flash. 49

50 Fig. 12.f Noe: he program On-line help can be accessed by pressing F Copying he seup On he Configure device page, once he new projec has been creaed, o ransfer he lis of configuraion parameers o anoher driver: read he lis of parameers from he source driver wih he Read command; remove he connecor from he service serial por; connec he connecor o he service por on he desinaion driver; wrie he lis of parameers o he desinaion driver wih he Wrie command. Imporan: he parameers can only be copied beween conrollers wih he same code. Differen firmware versions may cause compaibiliy problems Seing he defaul parameers When he program opens: selec he model from he range and load he associaed lis of parameers; go o Configure device : he lis of parameers will be shown, wih he defaul seings. connec he connecor o he service serial por on he desinaion driver; during he wrie procedure, he LEDs on he converer will flash. The driver parameers driver will now have he defaul seings Updaing he driver and display firmware The driver and display firmware mus be updaed using he VPM program on a compuer and he USB/LAN converer, which is conneced o he device being programmed (see paragraph 2.5 for he connecion diagram). The firmware can be downloaded from hp://ksa.carel.com. See he VPM On-line help. 50