EWCM 900. technical user manual. electronic controller for compressors and fans

Transcription

1 EWCM 900 technical use manual electonic contolle fo compessos and fans

2 Summay 1. INTRODUCTION VERSIONS GENERAL CHARACTERISTICS USER INTERFACE COMPRESSOR SECTION CONTROLS DISPLAY FAN SECTION CONTROLS DISPLAY OTHER DISPLAYS DIGITAL INPUTS AND OUTPUTS DIGITAL INPUTS ALARM INPUTS OTHER INPUTS ANALOGIC INPUTS OUTPUTS ON RELAY OTHER CONNECTIONS PARAMETER PROGRAMMING SELECTING THE MENU PARAMETER DISPLAY AND MODIFICATION ENABLING FOR PROGRAMMING LIST OF PARAMETERS COMPRESSOR SECTION CONFIGURATION PARAMETERS PLANT DIMENSIONING CONFIGURING THE SUCTION PROBE CONFIGURING OTHER INPUTS OPERATIVE PARAMETERS OF THE COMPRESSOR SECTION INTERNAL CLOCK COMPRESSOR REGULATION WORK SET POINT ALARMS USER INTERFACE

3 REMOTE MANAGEMENT (TELEVIS / EWTD SYSTEM) FAN SECTION CONFIGURATION PARAMETERS PLANT DIMENSIONING DELIVERY PROBE CONFIGURATION CONFIGURATION OF OTHER INPUTS PASSWORD FAN SECTION OPERATION PARAMETERS FAN REGULATION WORK SETPOINT ALARMS PASSWORD SUMMARY OF THE PARAMETERS OPERATION SETPOINT DISPLAY AND MODIFICATION COMPRESSORS FANS DURATION OF COMPRESSOR AND VALVE OPERATION DISPLAY ZERO SETTING FANS AVAILABLE / IN MAINTENANCE STATE DISPLAY MODIFICATION FANS DIAGNOSTICS ALARM DIGITAL INPUTS PRESSURE ALARMS RESOURCE-ASSOCIATED ALARM PROBE FAILURE ALARM ALARMS FOR SETTING THE OPERATION LIMITS OTHER ALARMS ALARM SILENCING MANUAL RESETTING SUMMARY OF THE ALARM CONDITIONS

4 8. INSTALLATION MECHANICAL ASSEMBLY AND WORKING ENVIRONMENT ELECTRICAL CONNECTIONS PERMITTED USE Uses not allowed Responsibility and esidual isks TECHNICAL DATA

5 1. INTRODUCTION 1.1. VERSIONS EWCM 900 is a contolle dedicated to contolling the compession and condensation phases, by managing the compessos and fans, fo applications in efigeation plants. The instument contols moe than one compesso, of the ecipocating type, even with diffeent powes and stepped-capacities (patialisations): - simple homogeneous units (no powe factionating), - multiple stage homogeneous units (multiple stages with the same powe) - simple, non homogeneous units. Futhemoe, it is also possible to contol the fans of the condensing unit. The instument can contol the esouces (fans, compessos, with espective steps) by using 11 elay outputs, assigned by configuation GENERAL CHARACTERISTICS EWCM 900 is available in the vesions fo pessue o tempeatue input, both having the same type of contol and egulation. The inputs detect the conditions of the compesso section (suction) and the fan section (delivey). Pessue tansduces: with 4 20 ma cuent signal, of type EWPA 007, 030. Tempeatue pobe: with NTC type senso. Compesso and fan contol: 11 outputs on elays fo contolling the esouces (condensation fans and compessos), with coesponding alam inputs enegised. Resouces enabled accoding to a fixed sequence o otation (to equalise the opeation times o the esouces. Alam detection though digital (fom pessuestats and esouces) and analogic (fom pobe o tansduce) inputs, fo both sections, based on specific paametes. Setting the paametes and display of the opeation vaiables by means of quantities and units of measue that can be use-selected: pessue (Ba, PSI), in the elative o absolute scale, tempeatue ( C, F). Contol of the sections (compessos and fans) by means of two sepaate displays (thee- and fou-digit espectively). Two setpoints pogammable accoding to the time-peiod (nomal and educed ate). Seial connection fo the Televis / EWTD system. Safety system that caies out a continuous inspection on the opeation of the instument hadwae: if thee is EWCM failue o a powe failue, the "safety" elay output is enabled, and tansfes contol of the plant to a device pepaed fo emegency, thus ensuing minimum opeation until expet pesonnel ae able to come. Fig.1. 5

6 2. USER INTERFACE 2.1. COMPRESSOR SECTION CONTROLS PRG KEY: paamete pogamming key. It is used to access two distinct menus ( op and cnf ) and to end the pogamme. HRS KEY: the key is used to display the time (in hous) the compessos have been opeating. MAINT KEY: the key is used fo displaying o modifying the "available" o "in maintenance" state egading the compessos. SET KEY: this key displays the setpoints, accoding to the nomal set educed set succession, each in the diffeent display units. The enabled setpoint is always signalled by the coesponding LED (SET N o SET R). Duing pogamming, it is used to access the paamete value displayed and to confim any setting done. UP KEY: Any setpoint o paamete values displayed can be modified with it by inceasing the value. If the value is displayed, it shows the convesion sequence of the value in the diffeent units of measue. If the paamete menu label is displayed, it scolls the list of paametes. DOWN KEY: Any setpoint o paamete values displayed can be modified with it by deceasing the value. If the value is displayed, it shows the convesion sequence of the value in the diffeent units of measue. MUTE KEY: this is the key fo silencing and cancelling alams as well as fo zeo setting the compesso opeation time DISPLAY LOCK LED: keyboad lock signal (modifications not enabled). ALARM LED: alams tiggeed signal. LED fo UNIT OF MEASUREMENT (3 + PSI LED): indicates the unit of measuement egading the cuent display (pessue Ba, PSI; tempeatue - C, F). HRS LED: signals the compesso opeation time display (in hous). SET N LED: ON when the nomal setpoint is enabled; flashes when the nomal setpoint is being set o displayed ("SET" key pessed). (1) SET R LED: ON when the educed setpoint is enabled; flashes when the educed setpoint is being set o displayed ("SET" key pessed) (1) PRG LED: flashes when pogamming is in pogess (afte pessing the PRG key). MAINT LED: ON fo display o modification of compesso state. LED of state: see OTHER DISPLAYS. FOUR-DIGIT DISPLAY: Displays the value ead on the suction pobe, in the unit of measuement chosen with the deu paamete. It indicates the equivalent values in the othe units (coesponding measuing unit LED. Signals the duation of opeation of each compesso (identified by is espective LED, with LED HRS ON, by pessing the HRS key). Finally, it also displays the setpoints set as well as the two paamete menus egading the compessos. The quantities (values of eadings and paametes) ae epesented with diffeent esolutions (see TECHNICAL DATA). If an alam is on, nomal display altenates with the display of the alam code FAN SECTION CONTROLS PRG KEY: Paamete pogamming key. Accesses two distinct menus ( op and cnf ) and to end the pogamme. SET KEY: This is the key fo displaying the settings fo nomal and educed wok, and the pogamming paametes. UP KEY: key fo inceasing the values. DOWN KEY: key fo deceasing the values. SET KEY: key fo displaying the wok setpoints accoding to the nomal set educed set succession each in diffeent display units. The coesponding LED always signals which set is active (SET N o SET R LED). Duing pogamming, it pemits access to the paamete value displayed and confimation of any settings enteed. 6

7 DISPLAY ALARM LED: Signals alam ON. LED fo UNIT OF MEASUREMENT of the QUANTITY DISPLAYED (3 + PSI LEDs): indicates the unit of measue egading the cuent display (pessue Ba, PSI; tempeatue - C, F). SET N LED: ON when nomal setpoint is active, flashing when the nomal setpoint is being set o displayed by pessing the SET key. (1) SET R LED: ON when the educed setpoint is enabled; flashing when setting o displaying the educed setpoint when the key SET is pessed. (1) PRG LED: flashes when pogamming is in pogess (afte key PRG is pessed). State LED: see OTHER DISPLAYS. THREE-DIGIT DISPLAY: Displays the value ead off the condensation pobe (delivey), in the unit of measuement chosen with paamete deu. It indicates the equivalent values in the othe units (LEDs in the coesponding units of measue). It displays the setpoints set as well as the two paamete menus egading the fans. The physical sizes (eadings and paamete values) ae epesented each with a diffeent esolution (see TECHNICAL DATA). In case an alam is tiggeed, nomal display is altenated with the alam code. (1)= since the setpoint (nomal o educed) is in foce fo both sections, the two LEDs egading the given setpoint ae switched on simultaneously fo each section OTHER DISPLAYS LEDs FOR THE STATE OF THE COMPRESSORS AND STEPS (total 22 LEDs: 11 ed + 11 geen, situated above): they indicate the opeational state of the outputs assigned to compessos and pobable capacity stepping (patialisations). LEDs fo THE STATE OF THE FANS (total 11 yellow LEDs, situated above): they indicate the opeation state of the outputs assigned to the fans. PSI LEDs: indicate that the unit of measuement fo the cuent display is PSI (pounds pe squae inch). It is found nea the fan section. It is only enabled by paamete setting PSI. If enabled, all values (eadings, setpoints, and paametes of the "physical quantity" type)ae expessed in PSI, on both displays. 3. DIGITAL INPUTS AND OUTPUTS 3.1. DIGITAL INPUTS ALARM INPUTS The following contacts ae live. INPUT FROM PRESSURESTAT (LOW PRESSURE ALARM): fo signals fom a low pessue alam, depending on the condition of the pessuestat connected to teminals 5 and 6. It is contolled by the compessos/sep paametes. Input at the same powe voltage. INPUT FROM PRESSURESTAT (HIGH PRESSURE ALARM): fo signals fom high pessue alam, depending on the condition of the pessuestat connected to teminals 7 and 8. It is contolled with the fans/sep paametes. Input to the same powe voltage. ALARMS: 11 inputs potecting the compessos and fans; fo signals fom alams depending on devices connected to them (e.g. themal cutout potection)connected to teminals 22 to 43. Contolled by compessos/alip paametes OTHER INPUTS REDUCED SET: fo enabling the educed setpoint, by means of a clean, not live contact, (teminals 13 and 14). It is contolled by the compessos/sip paamete ANALOGIC INPUTS Depending on the model, the inputs ae compatible with: Pessue tansduces having 4 20 ma cuent signals, even of the non self-poweed type, of the EWPA 007, 030 type. Tempeatue pobes, with type NTC senso. SUCTION, COMPRESSOR SECTION: 1 input fo tansduce (EWPA 007) o pobe (teminals 15 and 16). DELIVERY, FAN SECTION: 1 input fo tansduce (EWPA 030) o pobe (teminals 17 and 18). 7

8 3.3. OUTPUTS ON RELAY RESOURCE REGULATION: 11 outputs on clean contact, configuable, fo contolling the esouces (compessos, steps, fans), via teminals 44 to 65. ALARM: alam signalling output; unde alam conditions, pemits enabling of extenal devices; clean contact, nomally closed (teminals 1 and 2). SAFETY: output fo tansfe of contol tasks to anothe pe-selected device, in case of instument failue o powe failue; nomally closed contact (teminals 3 and 4). Notes: the SAFETY and ALARM elays have open contacts in case of failue o alam, espectively. The safety elay is open when the instument is not poweed, closed when the instument is poweed (in nomal opeation) OTHER CONNECTIONS SERIAL PORT: RS-485 type, fo connection to Televis /EWTD system, via teminals 19 (gnd), 20 (+), 21 (-). INSTRUMENT POWER SUPPLY: powe input (teminals 9 and 10). Take note of the instument label fo the ated powe supply voltage. 4. PARAMETER PROGRAMMING 4.1. SELECTING THE MENU The following ae the paamete menus: Opeative op fo compesso section Opeative op fo fan section Configuation CnF fo compesso section Configuation CnF fo fan section In the text, the elative path is descibed as section/menu o section/paamete. Access to the menus: Compessos/ op : pess and elease the key PRG and then the key UP coesponding to the section. Fan/ op : pess and elease PRG and then UP egading the section. Compessos/ CnF : pess PRG twice and then UP egading the section. Fans/ CnF : pess PRG twice and then UP egading the section. To quit pogamming pess the key PRG once moe, stoing in memoy is automatic. If the passwod egading the menu has been enabled, access to the coesponding paametes is pevented (display PAS ). See ENABLING FOR PROGRAMMING PARAMETER DISPLAY AND MODIFICATION Afte having enteed the equied paamete menu, the following opeations can be caied out, using the coesponding section keys: scoll though the paametes: pess the diection keys UP o DOWN ; display the paamete value: pess SET ; modify the value displayed: pess the diection keys UP o DOWN once moe; exit paamete modification: pess the SET key again ENABLING FOR PROGRAMMING Thee ae fou passwods available fo accessing paamete pogamming. The passwods can be enabled, independently, fo one o moe of the following menus: compessos/ op : Paamete Pso. Fan/ op : Paamete Pso. Compessos/ CnF : Paamete Psc. Fan/ CnF : Paamete Psc. In the menu selected, when display o modification is accessed the label PAS appeas, if the paamete coesponding to the menu was set; pess the SET key; compose the passwod by using the UP and DOWN keys; If the passwod is coect, pess the SET key and then the UP key; if the passwod is not coect, pogamming is automatically exited. 8

9 Attention: all the paametes egading the passwods can take on the following values: 0= passwod disabled; 1 254= passwod enabled to the coesponding value. the passwod 255 is also available, eseved passwod: THE CORRESPONDING VALUE 255 CANNOT BE COMPOSED. 5. LIST OF PARAMETERS Some paametes ae efeed to the quantity o unit of measuement selected with deu, PSI. The coesponding limits and numbe of decimal places depend on the setting of deu, PSI. By vaying the setting, the values ae conveted to the new unit of measuement. These paametes ae defined as quantities below. Of these, some paametes ae available only fo the pessue input vesions and so ae defined "fo pessue" COMPRESSOR SECTION CONFIGURATION PARAMETERS PLANT DIMENSIONING CPnU: ComPesso NUmbe. Numbe of compessos pesent in the plant. CtyP: Compesso TYPe. Type of compesso and egulation. A distinction is to made between machines having the same powe (homogeneous) o not, since in the diffeent cases the type of egulation available changes: neutal zone egulation: selected fo compessos with diffeing powe, not with capacity stepping (patialisation). popotional band egulation: it is selected fo the compessos of equal powe (homogeneous), with capacity stepping (patialisation). In the case of capacity stepping (patialisation), non homogeneous compessos, both egulations ae possible: neutal zone: pefeable with a few, high-pessue compessos; popotional band: pemits geate egulation pecision even though it entails fequent switching-on and switching-off of the compessos. 0 = compessos of diffeent powe neutal zone egulation; 1 = homogeneous compessos popotional band egulation. Notes 1: With popotional band egulation with homogeneous compessos, it is possible to: Disable the steps to foce satuation of the esouces, see paamete sat. Contol switching-on and switching-off to distibute the esouces (standad mode): pefeentially a step of the enabled compesso is enteed fist, then a step of the compesso enabled second, and so on. Consideing the amount of esouces equied, it coesponds to the maximum numbe of enabled compessos. See paamete ot. Contol switching-on and switching off accoding to a fixed sequence. Set the chief ole fo a designated compesso. The chief compesso is enabled fist and disabled last in the esouce contol sequence, see paamete ncpc. Note 2: the chief ole can be assigned even in the case of neutal zone egulation with non-homogeneous compessos. PC1 PC11: Powe Compesso Paametes fo setting the powe of the single compessos, in case these have diffeent powes (available only fo CtyP = 0). The powe is identified by a value (between 1 and 255) popotional to the powe of the compesso. Example 1: 3 non-homogeneous compessos, not capacity-stepped (non patialised), of 10, 20 and 40 Hp. PC1 = 10, PC2 = 20 e PC3 = 40, o PC1 = 1, PC2 = 2 and PC3 = 4, etc. Example 2: 4 homogeneous compessos, not capacity-stepped (non patialised); if the neutal zone opeation is equested (CtyP = 0), fo PC1 PC11 the same value must be set: PC1 = 1, PC2 = 1, PC3 = 1, PC4 = 1, o any othe numbe. CPSt: ComPesso STep. Numbe of steps available fo each compesso, if these ae homogeneous and capacity-stepped (patialised) (paamete enabled only fo CtyP = 1). It is the same as the numbe of capacity valves plus 1. Note 1: The value of this paamete is automatically foced to 1 if compessos of diffeent powes have been selected (CtyP = 0). Note 2: Connect the compesso and its capacity-stepping (patialisations) occupying in sequence the positions on the teminal block. 9

10 Example: with a numbe of compessos CpnU = 2, each with steps CPSt = 3, the elays must be connected as below: Fig.2. Resouces: sequence of connection to the teminal block Compesso 1 Valve 2 of compesso 1 Valve 1 of compesso 1 Valve 1 of compesso 2 Compesso 2 Valve 2 of compesso 2 ot: compesso ROTation. Contol, using compesso otation. It pemits choosing among the following ways of insetion: fixed sequence: enabling of the fist compesso of the sequence insetion of the steps of the fist compesso (if pesent) enabling of the second compesso, and so on. otation: depending on the duation of opeation, switching on of the compessos in inceasing ode: enabling of the compesso (with minimum opeation) insetion of the coesponding steps (if pesent) enabling of the second compesso (in tems of duation of opeation). The pupose is to balance the numbe of hous of opeation. 0 = fixed sequence; 1 = compesso otation. sat: compesso SATuation. Contol though esouce satuation. It enables the satuation algoithm, only fo homogeneous, capacity patialised compessos. The disable sequence is: disabling of the step of the last enabled compesso (if ot = 0), o the one with moe hous of duty (if ot = 1) disabling of the othe steps of the same compesso (until it switches off) and so on. Consideing the amount of esouces equested, it coesponds to the maximum numbe of compessos. 0 = standad opeation 1 = esouce satuation ncpc: Numbe ComPesso Chief. Identification of the maste compesso. Pemits assigning one of the compessos the ole of chief. If set to "0", contol via the chief is disabled. Othewise, the compesso numbe is set accoding to the ode of connection to the teminal boad. FtyP: Feon TYPe. The type of efigeating gas used in the plant. The efigeant must be set fo the convesion of the tempeatue pessue data caied out by the instument and theefoe fo optimum system opeation. 0 = R 134a; 1 = R 22; 2 = R 502; 3 = R 404a; 4 = R 407c; 5 = R 507; 6 = R 410a. PSI: Display of the values (eadings, set point, paametes) in the PSI as unit of measuement. If enabled, all the values ae expessed in PSI, even fo the fan section. In this case the PSI LEDs, and those coesponding to the units peviously assigned to the two sections. 0 = unit of measuement selected with deu ; 1 = values conveted to PSI CONFIGURING THE SUCTION PROBE 10

11 P04: Pessue at 4 ma. Pessue value ead by the tansduce and to be associated with the 4 ma input cuent ( quantity ; fo pessue). P20: Pessue at 20 ma. Pessue value ead by the tansduce and to be associated with the 20 ma input cuent ( quantity ; fo pessue). CAL: CALibation. Calibation of the tansduce o pobe eading ( quantity ) CONFIGURING OTHER INPUTS SEP: SEt alam Polaity. Alam input polaity (teminals 5 and 6). It detemines the state of contact, fo the pessuestat associated with low pessue signalling, coesponding to the tiggeed alam. 0 = alam in the absence of voltage; 1 = alam in the pesence of voltage. SIP: Reduced Set Input Polaity. Reduced setpoint input polaity (teminals 13 and 14). It detemines the state of the contact coesponding to the educed setpoint mode enabling. 0 = educed setpoint active with contacts open; 1 = educed setpoint active with contacts closed. ALIP: ALam Input Polaity. Polaity of the alam inputs associated with the esouces (compessos and fans, teminals fom 22 to 43). It detemines the state of the contact coesponding to the tiggeed alam. 0 = alam in the absence of mains voltage; 1 = alam in the pesence of mains voltage. StPP: STep outputs Polaity. Polaity of the outputs fo the capacity valves. It detemines the state of the elays, associated with the capacity valves (only fo homogeneous stepped-capacity (patialised) compessos. 0 = valve connection (step enabled) if the contact is closed (and vicevesa); 1 = valve connection (step enabled) if the contact is open (and vicevesa);. The elays associated with the compessos do not depend on the StPP setting Passwod and Poduction Setting Psc: PaSswod Configuation. Passwod to access the configuation paametes, see ENABLING FOR PROGRAMMING. tab: TABle of paametes. Index of configuation of paametes set in poduction; cannot be modified by the use OPERATIVE PARAMETERS OF THE COMPRESSOR SECTION INTERNAL CLOCK Paametes fo setting the intenal clock on which is based the opeation accoding to the nomal o educed setpoint. Pi: PRImes. Sets the minutes of the cuent time on the intenal clock of the instument. HoU: HOURs. Sets the cuent hou on the intenal clock. day: DAY. Sets the cuent day of the week on the intenal clock. Note: 1 = Sunday ; 7 = Satuday COMPRESSOR REGULATION deu: DEfault Unit. Sets the dimension o unit of measuement used fo display (eading, setpoint, paametes). 0 = ba; 1 = C; 2 = F. Pbd: Popotional BanD. Amplitude of the popotional band and the neutal zone. The unit of measuement depends on the setting of deu, quantity. The band (o zone) is symmetical compaed to the wok setpoint, with extemes: set+pbd/2 set Pbd/2. Distinguish cases of: popotional band (homogeneous compessos, CtyP= 1): egulation is popotional inside the band, connecting o disconnecting the esouce accoding to the powe equested. See fig. 3. neutal zone (compessos of diffeent powe, CtyP= 0, also possible fo homogeneous non capacitystepped (patialised) compessos): If the actual pessue (o tempeatue) is geate than set+pbd/2 then the compesso call phase stats, if less than set Pbd/2 then the compesso elease phase stats. Inside the neutal zone, connections o disconnections of esouces ae not expected. See fig.4. 11

12 Fig

13 onon: ON/ON compesso. The least time between two consecutive switch-ons of the same compesso. ofon: OFf/ON compesso. The least time between switch-off and switch-on of the same compesso. don: Delay ON. Delay between consecutive enablings of two diffeent steps (o compessos). dof: Delay OFf. Delay between consecutive eleases of two diffeent steps (o compessos). donf: Delay ON/oFf. Minimum duation of compesso opeation, fom connection to the next disconnection. FdLy: Fist DeLaY on. Enables the delay between the call fo a step and its actual enabling. The delay is equivalent to don. If this paamete is not enabled, evey step is tiggeed at the moment of the call so long as the delay fom the pevious tiggeing is espected. If enabled, the tiggeing of the step is delayed with espect to the call fo a don value. This polongs all the intevals between connections, even in cases of tiggeing following a condition of equilibium and fist tiggeing. 0 = no; 1 = yes. FdLF: Fist DeLay off. Enables the delay between the equest fo elease and the actual disconnection of the step. The delay is equal to dof. The behaviou is simila to that of FdLy. 0 = no; 1 = yes odo: Output Delay at On. Duation of compesso output oveide stating fom switch-on of the instument WORK SET POINT LSE: Lowe SEt. Minimum pogamming level of the setpoint; quantity paamete. HSE: Highe SEt. Maximum pogamming level of the setpoint; quantity paamete StS: Stat Time Reduced Set. Stating time fo the educed setpoint opeation time inteval. If the paamete is set to "0", opeation with educed setpoint is disabled (the nomal setpoint is always enabled). SPS: StoP time Reduced Set. Stopping time fo the educed setpoint opeation time inteval. If the paamete is set to "0", opeation with educed setpoint is disabled (nomal setpoint is always enabled). Sd1 Sd7: Reduced Set Day 1 7. Enabling of the educed setpoint fo each day of the week, based on the time inteval limited by StS, SPS. The following cases can be distinguished: Sts = SPs = 0; setting of Sd1 Sd7: 0 : the nomal setpoint is always enabled; 1 : the educed setpoint is always enabled; Else, setting of Sd1 Sd7: 0: educed setpoint enabled in the time inteval Sts SPs, on the day efeed to in paamete Sd1 Sd7; besides the inteval the nomal setpoint is valid. 1: nomal setpoint Sts SPs active enabled; besides the inteval the educed setpoint is valid. Note: Sd1 = Sunday; Sd7 = Satuday ALARMS UAo: Unit AlaRm Oveide. This selects the unit of measuement fo the alam silenced time, set by paamete Ao. 0 = minutes; 1 = hous. Ao: AlaRm Oveide. Duation of alam silenced: This is the peiod following the silencing of an alam duing which the alam elay is disabled, to avoid signalling alams that ae tiggeed too close to each othe. PAO: Powe Alam Oveide. Duation of alam oveide at switch-on. It is the peiod, stating fom instument switch-on, befoe an alam is signalled. LAL: Lowe ALam. Minimum pessue alam. This is the value that, subtacted fom the setpoint value, detemines the minimum alam theshold. The alam is signalled as 03. Quantity paamete. HAL: Highe ALam. Maximum pessue alam. This is the value, added to the setpoint value, detemines the maximum alam theshold. The alam is signalled as 04. Quantity paamete. Note: the alams egading LAL and HAL ae geneated when the egulation pobe finds a value that exceeds the coesponding set limit. tao: Time Alam Oveide. Delay befoe signalling the minimum o maximum alam. SE: SERvice. Inteval fo sevice/maintenance equest. This is the duation of opeation afte which the compesso equest fo sevice/maintenance is automatically signalled. The compesso in question is excluded fom opeation. The inteval set is common to all compessos. PEn: Pessuestat Eos Numbe. Numbe of times the low pessue pessuestat should be tiggeed, in the inteval defined by PEI, befoe an 0L alam condition is tiggeed. If set to "0", the pessuestat eo function is oveidden. 13

14 PEI: Pessuestat Eos Inteval (time). Time inteval in which to count the times the suction pessuestat has been tiggeed (see paamete PEn ). CPP: Compesso Pobe Potection. It detemines how the compessos ae contolled in case of faulty suction pobe (signalling 01 ). 0 = maintaining the esouces enteed at the moment of the failue; 1 = enteing the esouces established by paametes SP and PoP. Note: if CPP = 1, the numbe of designated steps is enabled (with paamete SP, only to egulate the popotional band, homogeneous compesso), o the esouces coesponding to the selected powe (with paamete PoP, only fo neutal zone egulation). SP: Step PRobe potection. Numbe of steps to be enteed if the suction pobe is faulty, if popotional band egulation has been set (homogeneous compessos, CtyP = 1; CPP = 1). PoP: POwe with faulty PRobe. Powe to be enteed if suction pobe is damaged, if neutal zone egulation has been set (non homogeneous compessos o even homogeneous compessos that ae not capacitystepped (patialised), if CtyP = 0; CPP = 1). Value accoding to the popotionality adopted fo the paametes PC1 PC USER INTERFACE ELP: RELative Pessue. Selection of absolute o elative pessue display. 0 = absolute pessue; 1 = elative pessue. Loc: keyboad LOCk function. It locks the keyboad, disabling the following functions: Paamete modification, Setpoint modification, zeo-setting the wok hous counte fo the vaious compessos (maintenance). Lockout is signalled by the LOCK LED switching on. The paamete Loc does emain accessible. 0 = keyboad enabled fo modification; 1 = keyboad locked. Pso: PaSswod Opeating. Passwod fo access to opeative paametes, see ENABLING FOR PROGRAMMING REMOTE MANAGEMENT (TELEVIS / EWTD SYSTEM) FAA: FAmily Addess. This is used to set the "family" code to be assigned to each instument fo ecognition in the sphee of the emote management netwok. dea: DEvice Addess. This is used to set the "addess" code to assign to each instument fo ecognition in the sphee of the emote management netwok. tab: TABle of paametes. Paamete configuation index set in the factoy; not modifiable by the use. EL1: ELIWELL 1. Paamete that cannot be modified by the use. EL2: ELIWELL 2. Paamete that cannot be modified by the use FAN SECTION CONFIGURATION PARAMETERS PLANT DIMENSIONING nfn: numbe of Fans. The numbe of fans the plant has DELIVERY PROBE CONFIGURATION P04: Pessue at 4 ma. Pessue value ead off the tansduce to be associated with the 4 ma input cuent ( quantity ; fo pessue). P20: Pessue at 20 ma. Pessue value ead off the tansduce to be associated with the 20 ma input cuent ( quantity ; fo pessue). CAL: CALibation. Calibation of the tansduce o delivey pobe eading. ( quantity ) CONFIGURATION OF OTHER INPUTS SEP: SEt alam Polaity. Alam input polaity (teminals 7 and 8). It detemines the state of the contact, fo the pessuestat associated with the high pessue signalling, coesponding to the alam tiggeed. 0 = alam in the absence of voltage; 1 = alam in the pesence of voltage PASSWORD Psc: PaSswod Configuation. Passwod fo access to the configuation paametes, see ENABLING FOR PROGRAMMING. 14

15 tab: TABle of paametes. paamete configuation index set in poduction; not modifiable by the use FAN SECTION OPERATION PARAMETERS FAN REGULATION deu: DEfault Unit. Sets the dimension o the unit of measuement used fo display (eadings, setpoint, paametes). 0 = ba; 1 = C; 2 = F. Pbd: Popotional BanD. Amplitude of the popotional band fo fan egulation. The unit of measuement depends on the setting of deu, quantity. The band is symmetical compaed to the wok setpoint, with extemes: set+pbd/2 set Pbd/2. Inside the band the egulation is popotional, connecting o disconnecting a esouce accoding to the powe equied. don: Delay ON. Delay time between two consecutive fan enablings. dof: Delay OFf. Delay time between two consecutive fans eleases. ot: ROTation. Contol via fan otation, in enabling and in elease: fixed sequence: enabling/elease of the fist fan of the sequence second fan of the sequence and so on. otation: depends on the duation of opeation, enabling/elease of the fans in ode of inceasing duation. The pupose is to balance the numbe of hous of opeation. 0 = fixed sequence; 1 = otation of the fans WORK SETPOINT LSE: Lowe SEt. Minimum pogamming limit of the setpoint; quantity paamete. HSE: Highe SEt. Maximum pogamming limit of the setpoint; quantity paamete ALARMS LAL: Lowe ALam. Minimum pessue alam. Value that, subtacted fom the setpoint, detemines the minimum alam theshold. The alam is signalled as 03. Quantity paamete. HAL: Highe ALam. Maximum pessue alam. Value that, subtacted fom the setpoint, detemines the maximum alam theshold. The alam is signalled as 04. Quantity paamete. Note: the alams coesponding to LAL and HAL ae geneated when the value found by the egulation pobe exceeds the coesponding set limit. PEn: Pessuestat Eos Numbe. Numbe of times the pessuestat associated with signalling high pessue must be tiggeed, as defined by the inteval PEI, befoe it can be consideed an alam condition 0H. If set to "0", pessuestat eo is oveidden. PEI: Pessuestat Eos Inteval time. The time inteval fo counting the numbe of times the pessuestat has been tiggeed (see paamete PEn ). FPP: Fan Pobe Potection. It detemines the kind of fan contol if the delivey pobe is damaged (alam signalling 01 ). 0 = fans kept connected at the moment of failue; 1 = fan connection based on paamete FP. FP: Fan Pobe numbe. Numbe of fans to be connected if the delivey pobe is damaged; enabled only fo FPP = PASSWORD Pso: PaSswod Opeating. Passwod to access the opeation paametes, see ENABLING FOR PROGRAMMING. tab: TABle of paametes. Factoy set paamete configuation index; it cannot be modified by the use SUMMARY OF THE PARAMETERS COMPRESSOR SECTION CONFIGURATION PARAMETERS Paamete Desciption Inteval and default Unit of measuement Notes 15

16 CpnU Numbe of compessos Numbe CtyP Type of compesso Numbe PC1..PC11 Powe of compesso 1 11 (if non homogeneous Numbe Values compessos) popotional to the powes CPSt Numbe of steps pe compesso (if homogeneous Numbe compessos) Rot Rotation o fixed sequence Numbe Sat Satuation Numbe NCPC Numbe: Chief compesso Numbe FtyP Type of efigeating gas used Numbe PSI Pessue display in PSI Numbe P04 Pessue coesponding to 4 ma fom tansduce 0,0 8,0 0,5 Ba Only pessue; 0,0 PSI Quantity P20 Pessue coesponding to 20 ma fom tansduce 0,0 31,0 8,0 Ba Only pessue; 0,0 PSI Quantity CAL Calibation of tempeatue pobe o pessue tansduce -0,5 0,5 0,0 Ba Fo pess PSI tansd.; Quantity C/ F Fo temp. pobe; Quantity SEP pessuestat alam input polaity Numbe RSIP Reduced setpoint input polaity Numbe ALIP Compesso alam input polaity Numbe StPP Compesso steps output polaity Numbe Psc Configuation paametes Passwod Numbe The value 255 must not be set TAb Configuation paametes index / / / OPERATIVE PARAMETERS Paamete Desciption Inteval and default Unit of Notes measuement Pi Minutes fo clock pogamming Minutes HoU Hous fo clock pogamming Oe DAY Day fo clock pogamming Numbe DEU Unit of measuement fo display Numbe Pbd Amplitude of popotional band (o neutal zone) 0,1 5,0 0,4 Ba Quantity PSI C F onon Delay between consecutive statups Minutes ofon Delay between switch-off and statup Minutes don Statup delay between two esouces Seconds dof Release delay between two esouces Seconds donf Minimum opeation time Seconds FdLy Enables don fo fist delay Numbe FdLF Enables dof fo fist delay Numbe odo Output delay on instument switch-on Seconds LSE Minimum setpoint value 0,1 HSE 0,2 Ba Quantity HSE PSI HSE C HSE F HSE Maximum setpoint value LSE 25 5 Ba Quantity LSE PSI LSE C LSE F StS Time fo stat of educed setpoint Oe SPS Time fo end of educed setpoint Oe Sd1 Sd7 Enables educed setpoint fo days Numbe UAo Unit of measuement fo alam silencing Numbe Ao Alam silenced time Minutes PAO Alam oveide on switch-on Minutes LAL Minimum pessue alam 0, Ba Quantity PSI C F HAL Maximum pessue alam 0, Ba Quantity PSI C 16

17 F tao Alam signalling delay Minutes SE Inteval fo maintenance/sevice equest Oe PEn Numbe of pessuestat tiggeings befoe alam is Numbe signalled PEI Pessuestat tiggeings count inteval Minutes CPP State of compessos fo damaged pobe Numbe SP State of steps fo damaged pobe 0 CpnU 1 Numbe PoP Powe to connect fo damaged pobe Numbe Accoding to the popotionality of PC1 PC11; The uppe limit cannot exceed the value: PC1 + + PC11 ELP Absolute o elative pessue display Numbe Loc Keyboad lock Numbe Pso Opeation paametes Passwod Numbe The value 255 must not be set FAA Instument family fo emote management Numbe dea Instument addess fo emote management Numbe tab Paamete pogamming index (eseved) / / / EL1 Reseved / / / EL2 Reseved / / / CONDENSER FAN SECTION CONFIGURATION PARAMETERS Paamete Desciption Inteval and default Unit of measuement nfn Numbe of fans Numbe P04 Pessue coesponding to 4 ma fom tansduce 0,0 8,0 0,5 Ba Only pessue; 0,0 PSI Quantity P20 Pessue coesponding to 20 ma fom tansduce 0,0 31,0 8,0 Ba Only pessue; 0,0 PSI Quantity CAL Calibation of tempeatue pobe o pessue tansduce -0,5 0,5 0,0 Ba Fo pess PSI tansd.; Quantity C/ F Fo temp. pobe; Quantity SEP Pessuestat alam input polaity Numbe Psc Configuation paametes passwod Numbe The value 255 must not be set tab Configuation paametes index (eseved) / / / OPERATION PARAMETERS Paamete Desciption Inteval and default Unit of Notes measuement deu Unit of measuement fo display Numbe Pbd Popotional band 0,1 5,0 0,4 Ba Quantity PSI C F don Statup delay between two esouces Seconds dof Release delay between two esouces Seconds ot Rotation o fixed sequence Numbe LSE Minimum setpoint value 0,1 HSE 0,2 Ba Quantity HSE PSI HSE C HSE F HSE Maximum setpoint value LSE 25 5 Ba Quantity LSE PSI LSE C LSE F LAL Minimum pessue alam 0, Ba Quantity PSI 17 Notes

18 C F HAL Maximum pessue alam 0, Ba PSI C F PEn Numbe of pessuestat tiggeings befoe alam is Numbe signalled PEI Pessuestat tiggeings count inteval Minutes FPP State of fans fo damaged pobe Numbe FP Numbe of fans fo damaged pobe 0 nfn 4 Numbe Quantity 6. OPERATION 6.1. SETPOINT DISPLAY AND MODIFICATION Nomal Setpoint: this is the steady wok setpoint. Reduced Setpoint: this is the wok setpoint that can be set in those moments of less involvement of the plant (e.g. duing night hous and on holidays), and so save enegy. Pess and elease the SET key to display the nomal setpoint in the unit of measuement chosen as standad in the paametes pogamming phase. Pess the SET key epeatedly to display the nomal setpoint consecutively, in the diffeent units of measuement, and then the educed setpoint in the diffeent units. The selection of the type of unit of measuement is indicated by the Ba, o PSI o C o F LED switching on. The active setpoint is indicated by the coesponding pilot LED switching on (LED N Nomal and LED R Reduced). To modify the value of the setpoint displayed pess the UP and DOWN keys diectly. The following paagaphs descibe some pocedues egading the compesso and fan states. Note that fo the compessos the opeation duation is efeed to the whole compesso, wheeas the states of the esouces and maintenance ae efeed to the compesso with its stepped-capacity (patialisation) (if pesent). Example: two compessos, each with two stepped-capacity (patialisation) (total 3+3 steps, set as esouces 1 6, see fig. 2). Displays egading the esouces: fo the duation of opeation 1, 4 (ed LEDs); fo the state of maintenance 1 (ed, combined with 2, 3 geen), 4 (ed, plus 5, 6 geen); fo the state of the esouces 1,2,3,4,5,6 (ed and geen LEDs depending on the type of esouce and eventual timings) DISPLAY OF THE STATE OF THE RESOURCES COMPRESSORS The connections of the esouces ae conditioned by the call (situation of plant)and by the delay paametes. In the same way, disconnection entails tiggeing the elease of the esouce in use and espect of the delays set. If set, the esouce connection delay (compesso o stepped-capacity (patialisation)) is signalled by the coesponding geen LED flashing, that lasts fom call to connection. Once connected, the LEDs stay on continuously: ed (fo the compessos) geen (fo stepped-capacity (patialisation)). The delay egading the elease of the esouce is signalled by the flashing of the coesponding geen LED. At the moment of disconnection, the LEDs mentioned, switch off. Fo alams egading digital inputs, the LED associated with the compesso flashes, with the ALARM LED on continuously and the display showing the alam code FANS The connections and disconnections ae linked, as fo the compessos, to the tiggeing (in tems of esouces needed) and the delays set. The display is simila to the pevious one, but only the yellow LEDs ae efeed to. Afte the call and until connection, the LED coesponding to the fan involved flashes. If the LED is on continuously, the coesponding esouce is in opeation. Duing elease the LED flashes fo the duation of the delay connected. On disconnection the LED switches off. 18

19 If the alam coesponds to a digital input, the LED associated with it flashes, with the "ALARM" LED on continuously and the alam code on the display DURATION OF COMPRESSOR AND VALVE OPERATION DISPLAY Pess and elease the HRS key: the HRS LED switches on and stays on. The duation of opeation of the fist compesso is displayed, in hous. Pess the UP key within 5 seconds to pass to the next compessos. The ed LED flashes (state of the compessos, above) to indicate which compesso has been selected. Afte the last compesso has been displayed, pess the UP key again and the duation of opeation of the fans is displayed ZERO SETTING Fo each compesso, zeo setting of the time of opeation is obtained by holding down the MUTE key FANS Afte the display egading the last compesso, pess the UP key again to display the numbe of hous of opeation of the fans. The duation can be set to zeo, as explained at the pevious paagaph; yet fo the fans the duation of opeation has no effect on the equest fo maintenance with the consequent disabling (see paamete SE ) AVAILABLE / IN MAINTENANCE STATE DISPLAY Pess and elease the MAINT key: the MAINT key switches on and stays on. The state of the fist compesso is displayed. The state is indicated on the display as follows: onln (on Line) = compesso available ofln (off Line) = compesso in maintenance. Pess the UP key within 5 seconds to pass to the next compessos. The ed LED flashing (state of the compessos) indicates which compesso has been selected. Afte the display of the last compesso, pess the UP key to display the states egading the fans MODIFICATION The state of the compesso selected is modified by pessing the MUTE key fo moe than 5 seconds: the MAINT LED flashes. The change of state is indicated on the display (label onln, ofln ). The in maintenance state continues being signalled, fo each compesso, by the flashing of the coesponding ed LED and the geen LEDs egading the capacity stepping (patialisation) (if pesent). The output is always disabled when the compesso is in maintenance FANS Afte the display egading the last compesso, pess the UP key again to display and if necessay, modify the states egading the fans, as at the peceding paagaph. 7. DIAGNOSTICS The following conditions ae signalled by the LEDs switching on and messages appeaing on the display, as will be explained in detail. The messages displayed on the left, compesso section, ae peceded by the abbeviation E. Those displayed on the ight, fan section, ae peceded by E. If an alam is tiggeed, the ALARM LED of the section egading the alam (compessos o fans) is on. Fo all alams, the alam output is enabled (teminals 1 and 2 closed) ALARM DIGITAL INPUTS 19

20 The digital inputs supply two types of alam, caused, espectively, by the tiggeing of the pessuestat (2 inputs) and the devices associated with each esouce (11 inputs). Besides what has been descibed befoe, appea: alam message on the display of the coesponding section: 0L appeas in the compesso section, 0H in the fan section, 02 depending on the elationship with the esouce. Fo alam 02, flashing of the LED associated with the esouce (ed LED fo the compesso, yellow fo the fans) PRESSURE ALARMS Teminals 5-6 and 7-8. Paametes: compessos/ SEP and fans/ SEP. These inputs ae connected to the pessuestats assigned espectively to the low and high pessue alams. The alams geneated ae 0L and 0H. These cases ae distinguished: input fo low pessue alam (nomally associated with the condition in suction). All the outputs egading the compessos and the fans ae disabled. Fo a geneic tiggeing of the pessuestat, thee is no signalling on the display, esetting is automatic. When the numbe of pessuestat tiggeings is equal to PEn in the time PEI, thee is a signalling on the left-hand display (0L). In this case esetting is manual (the MUTE key must be pessed fo moe than 5 seconds). high pessue alam input (nomally associated with the delivey condition). All the coesponding outputs to the compessos ae disabled. All the outputs egading the fans ae enabled. Fo a geneic tiggeing of the pessuestat, thee is no signalling on the display, esetting is automatic. When the numbe of pessuestat tiggeings ae equal to PEn in the time PEI, it is signalled on the lefthand display (0H). In that case esetting is manual (the MUTE key must be pessed fo moe than 5 seconds) RESOURCE-ASSOCIATED ALARM Teminals fom 22 to 43, paamete ALIP. The potections egading the compessos and fans ae connected to these inputs. If one of the potections tip (fo example, fo lack of oil in the compesso, oveheating, etc.), the coesponding output will be disabled. the cases ae: Alam egading the compesso: ed LED, coesponding to the compesso, flashing and the ALARM LED on continuously, on the left-hand display appeas 02, altenating to the pobe eading. Alam egading the fan: yellow LED, coesponding to the fan, flashing and the ALARM LED on continuously. On the ight-hand display appeas 02, altenating to the pobe eading. If the alam is silenced, ALARM LED flashes. The alam is eset automatically. The alam inputs count ae based on the numbe of compessos, not the numbe of steps. Example: the fist thee alam inputs 22-23, 24-25, 26-27, will be assigned, one fo each compesso, to thee compessos with two capacity-steps (patilisations) PROBE FAILURE ALARM This consists in a connection o functional defect of the suction o delivey pobes. This is displayed on the left- and ight-hand displays, espectively with the message 01. It is contolled by the paametes CPP, SP, PoP (suction compesso section) and FPP, FP (delivey fan section), that guaantee a specific use of the esouces. Automatic eset (the esouces ae enabled accoding to the paametes mentioned) ALARMS FOR SETTING THE OPERATION LIMITS This consists in ovecoming the opeation limits, which means too high a pessue (delivey) o too low (in suction). It is contolled by the paametes HAL, LAL. Silencing is pemitted. The cases ae: Low pessue alam, value measued by the pobe duing suction is less than set LAL. Signalled on the left-hand display, with message 03. This alam is eset automatically when the value measued exceeds set LAL/2 (deviation less than half of LAL). High pessue alam, value measued by the pobe in delivey is geate than set + HAL. Signalled on the ight-hand display, with message 04. Automatic eset when the value measued deceases below set + HAL/2 (deviation less than half of HAL) OTHER ALARMS Mistaken pogamming of the clock (see paametes Pi, HoU and day ). Signalled with message 11. Reset: set clock. 20

21 Mistaken pogamming of the paametes (example: numbe and chaacteistics of the esouces exceeding the ties ). Signalled with message 12. Alam eset is manual. Instument self-diagnosis alam, due, fo example, to electical intefeence, ove-voltage. Signalled with message 13. Alam eset is manual. Request fo maintenance. This indicates that at least one of the compessos has eached the duation of opeation (paamete SE ) fo which a equest fo maintenance is signalled. The compesso in alam is signalled by the flashing of its esouce LED (ed) and is disabled at the same time. It is signalled with message 14. Alam eset: set to zeo the numbe of hous of opeation fo the compesso in question ALARM SILENCING Pess and elease the MUTE key to disable the alam elay output, the ALARM LED flashes, indicating that the alam condition is still active, though the automatic eset could tip. The alam stays silenced fo a duation that can be set by the paametes UAo and Ao. If duing the silenced time othe alams ae intecepted by the EWCM Alam eset is manual silencing is cancelled and the new alam will be signalled MANUAL RESETTING Pess the MUTE key. The left-hand display shows the message CanC. Keeping the key still pessed, ES appeas: at this point, the alam has been eset SUMMARY OF THE ALARM CONDITIONS MESSAGE DESCRIPTION RESET Pessuestat alams: 0L Regading the "minimum pessue" pessuestat (teminals 5, 6). 0H Regading the "maximum pessue" pessuestat (teminals 7, 8). Pobe failue alam: 01 Pobe damage (suction o delivey). Paametes: CPP, SP, PoP (suction compesso section) e FPP, FP (delivey fan section) Othe digital input alams: 02 Regading compesso and fan potection devices. Entails disabling the esouce (compesso with possible steps, o fan), to which the alam is efeed. Alams fo setting the opeation limits: 03 Low pessue alam, if the value measued by the pobe is less than set LAL. 04 High pessue alam, if the value measued by the pobe is geate than set + HAL. automatic (the esouces ae enabled accoding to the paametes named). automatic Othe Alams 11 Mistaken pogamming of the clock. Set clock. 12 Mistaken pogamming of the paametes. Manual 13 Instument self-diagnosis alam. Manual 14 Request fo maintenance. See paamete SE. The compesso in alam is signalled with the coesponding esouce LED flashing (ed) and it is at the same time disabled. 8. INSTALLATION 8.1. MECHANICAL ASSEMBLY AND WORKING ENVIRONMENT. Automatic esetting when the value measued exceeds set LAL/2 (deviation less than half of LAL). Silencing, no esetting. Automatic eset when the value measued deceases below set + HAL/2 (deviation less than half of HAL). Silencing, no esetting. Set the numbe of opeation hous to zeo fo the compesso in question. The instument must be installed on a panel, on a 138 x 67 mm hole, fastened with the backet supplied. Fo coect opeation, the installation envionmental tempeatue, must be between 0 e 55 C. 21

22 Avoid installing in ooms with vey high humidity (paticulaly whee thee is much condensation) o dit. Thee is available, on equest, a potective cove that can be applied to the font panel and capable of offeing an IP55 potection ating ELECTRICAL CONNECTIONS The opeations must be caied out by an expet. Always switch off the instument when woking on the electical connections. The instument is equipped with scew teminal blocks, that can be disconnected) fo connecting the electic wies. Use cables with coss-section 2,5 mm 2 ; inset only one wie pe teminal fo the powe connections. Make sue that the powe supply voltage is in compliance with that specified (check the label on the instument). The elay outputs, on single contact, ae clea of voltage. Do not exceed the maximum cuent allowed fo the diffeent outputs (check on the afoementioned label). Fo geate loads, use a contacto of suitable chaacteistics. The tempeatue pobes need no insetion polaity; thei cables can be extended by using nomal twin wie flex (the extension has an impotance on the behaviou of the instument electomagnetic capabilities; geat cae must be taken with the cables). Fo the pessue tansduces, espect the insetion polaity. It would be best to use tansduces capable of accepting a non-egulated powe voltage. In paticula, it is advisable to use the EWPA 007 and 030 tansduces, fo measuing the high pessue (delivey) and low-pessue (suction) sections. Seial connection fo Televis / EWTD: pay paticula attention to the electomagnetic intefeence. It is advisable top use Belden-type sceened twin flex. The pobe cables, tansduces and seial connections must be sepaated fom the wies of the elay contacts and fom all pats with dangeous voltage, in geneal, by using insulation and distances that guaantee at least double o einfoced insulation. Fo electomagnetic compatibility, it would be advisable to do the sepaation by using sepaate insulating ducts and pope fastening methods fo the cables. 9. PERMITTED USE Fo safety easons the instument must be installed and used accoding to the instuctions supplied: in paticula, unde nomal conditions, pats beaing dangeous voltages must not be accessible. The device must be suitably potected fom wate and dust and must also only be accessible by using a tool (except the font panel). The device may be incopoated in appliances o plants used fo efigeation and it has been inspected unde the safety aspects, accoding to the Euopean Equalised Regulations used fo efeence. It may be classified: Accoding to its constuction as an automatic, electonic, standalone contol device, to be incopoated in a plant. Accoding to its automatic opeating featues as a contol device, 1 BY type; As a Class A device, accoding to the class and stuctue of the softwae it uses. 10. USES NOT ALLOWED Any othe use diffeent fom that allowed is pohibited. We point out that elay contacts ae of the functional type, and theefoe subject to beakdown. Any potection devices equied by the ules concening this poduct o dictated by common sense due to obvious safety easons should be applied outside the instument. 11. RESPONSIBILITY AND RESIDUAL RISKS Eliwell / Invensys Climate Contols Italia is not liable fo any damages deiving fom: installation/use diffeent fom that intended and, in paticula, not confoming to the safety standads pescibed by the egulations and/o heewith given in this technical sheet use on appliances that do not guaantee adequate potection against electical shock, wate and dust unde the conditions of assembly ealised; use on appliances that allow access to dangeous pats without the use of tools o without wanings; 22