EWCM 900 UM 12 1999
Contents
1. 14 5 3 3 CONFIGURATION OF OTHER 14 5 3 4 55 RE 14 5 4 FAN SECTION OPERATION 15 5 41 REGULATION 5 aUa aua NE aD EE aA NARI ERE UAR A NER a Va 15 5 4 2 WORK SETPOIN qme 15 5 4 3 ALARMS iid a an e a ede UR oda E aaa EY o gn 15 5 4 4 eredi eda ak aa die ban cd Va A Rau La RD 15 5 5 SUMMARY OF THE 15 6 OPERATION TOS cR ru Lx xcu eO RE VE D ND 18 6 1 SETPOINT DISPLAY AND 18 6 2 1 COMPRESSORS c c M 18 6 2 2 BANS A 18 6 3 DURATION OF COMPRESSOR AND VALVE OPERATION 19 6 3 T DISPEAY uiii in 19 6 3 2 ZERO SETTING ETT 19 6 3 3 FANS PEINE 19 6 4 AVAILABLE IN MAINTENANCE 19 6 4 1 DISPLA MED 19 6 4 2 MODIFICA MON P 19 6 4 32. Signalled with message 11 Reset set clock 20 e Mistaken programming of the parameters example number and characteristics of the resources exceeding the ties Signalled with message 12 Alarm reset is manual e Instrument self diagnosis alarm due for example to electrical interference over voltage Signalled with message 13 Alarm reset is manual e Request for maintenance This indicates that at least one of the compressors has reached the duration of operation parameter SEr for which a request for maintenance is signalled The compressor in alarm is signalled by the flashing of its resource LED red and is disabled at the same time It is signalled with message 14 Alarm reset set to zero the number of hours of operation for the compressor in question 7 5 ALARM SILENCING Press and release the MUTE key to disable the alarm relay output the ALARM LED flashes indicating that the alarm condition is still active though the automatic reset could trip The alarm stays silenced for a duration that can be set by the parameters UAro and Aro If during the silenced time other alarms are intercepted by the EWCM Alarm reset is manual silencing is cancelled and the new alarm will be signalled 7 6 MANUAL RESETTING Press the MUTE key The left hand display shows the message Keeping the key still pressed rES appears at this point the alarm has been reset 7 7 SUMMARY OF THE ALARM CONDIT
3. 2 Pbd Proportional BanD Amplitude of the proportional band for fan regulation The unit of measurement depends on the setting of HEU quantity The band is symmetrical compared to the work setpoint with extremes set Pbd 2 set Pbd 2 Inside the band the regulation is proportional connecting or disconnecting a resource according to the power required don Delay ON Delay time between two consecutive fan enablings doF Delay OFf Delay time between two consecutive fans releases rot ROTation Control via fan rotation in enabling and in release e fixed sequence enabling release of the first fan of the sequence second fan of the sequence and so on rotation depends on the duration of operation enabling release of the fans in order of increasing duration The purpose is to balance the number of hours of operation 0 fixed sequence 1 lt rotation of the fans 5 4 2 WORK SETPOINT LSE Lower SEt Minimum programming limit of the setpoint quantity parameter HSE Higher SEt Maximum programming limit of the setpoint quantity parameter 5 4 3 ALARMS LAL Lower ALarm Minimum pressure alarm Value that subtracted from the setpoint determines the minimum alarm threshold The alarm is signalled as 03 Quantity parameter HAL Higher ALarm Maximum pressure alarm Value that subtracted from the setpoint determines the maximum alarm threshold The alarm is signalled as 04 Quantity parameter
4. LED for UNIT OF MEASUREMENT of the QUANTITY DISPLAYED 3 PSI LEDs indicates the unit of measure regarding the current display pressure Bar PSI temperature F SET N LED ON when normal setpoint is active flashing when the normal setpoint is being set or displayed by pressing the SET key 1 SET R LED ON when the reduced setpoint is enabled flashing when setting or displaying the reduced setpoint when the key SET is pressed 1 PRG LED flashes when programming is in progress after key PRG is pressed State LED see OTHER DISPLAYS THREE DIGIT DISPLAY Displays the value read off the condensation probe delivery in the unit of measurement chosen with parameter dEU It indicates the equivalent values in the other units LEDs in the corresponding units of measure It displays the setpoints set as well as the two parameter menus regarding the fans The physical sizes readings and parameter values are represented each with a different resolution see TECHNICAL DATA In case an alarm is triggered normal display is alternated with the alarm code 1 since the setpoint normal or reduced is in force for both sections the two LEDs regarding the given setpoint are switched on simultaneously for each section 2 3 OTHER DISPLAYS LEDs FOR THE STATE OF THE COMPRESSORS AND STEPS total 22 LEDs 11 red 11 green situated above they indicate the operational state of the outputs assigned to compres
5. Note the alarms corresponding to LAL and HAL are generated when the value found by the regulation probe exceeds the corresponding set limit PEn Pressurestat Errors Number Number of times the pressurestat associated with signalling high pressure must be triggered as defined by the interval PEI before it can be considered an alarm condition If set to 0 pressurestat error is overridden PEI Pressurestat Errors Interval time The time interval for counting the number of times the pressurestat has been triggered see parameter FPP Fan Probe Protection It determines the kind of fan control if the delivery probe is damaged alarm signalling 01 0 z fans kept connected at the moment of failure 1 fan connection based on parameter FPr FPr Fan Probe number Number of fans to be connected if the delivery probe is damaged enabled only for FPP 1 5 4 4 PASSWORD Pso PaSsword Operating Password to access the operation parameters see ENABLING FOR PROGRAMMING tAb TABle of parameters Factory set parameter configuration index it cannot be modified by the user 5 5 SUMMARY OF THE PARAMETERS COMPRESSOR SECTION CONFIGURATION PARAMETERS Parameter Description Interval and default Unit of measurement 15 CpnU Number of compressors m Number CiyP Type of compressor ot PC1 PC11 Power of compressor 1 11 if non homogeneous 1 255 Number luus compressors pr
6. 14 It is controlled by the compressors rSIP parameter 3 2 ANALOGIC INPUTS Depending on the model the inputs are compatible with Pressure transducers having 4 20 mA current signals even of the non self powered type of the EWPA 007 030 type Temperature probes with type NTC sensor SUCTION COMPRESSOR SECTION 1 input for transducer EWPA 007 or probe terminals 15 and 16 DELIVERY FAN SECTION 1 input for transducer EWPA 030 or probe terminals 17 and 18 3 3 OUTPUTS ON RELAY RESOURCE REGULATION 11 outputs on clean contact configurable for controlling the resources compressors steps fans via terminals 44 to 65 ALARM alarm signalling output under alarm conditions permits enabling of external devices clean contact normally closed terminals 1 and 2 SAFETY output for transfer of control tasks to another pre selected device in case of instrument failure or power failure normally closed contact terminals 3 and 4 Notes the SAFETY and ALARM relays have open contacts in case of failure or alarm respectively The safety relay is open when the instrument is not powered closed when the instrument is powered in normal operation 3 4 OTHER CONNECTIONS SERIAL PORT RS 485 type for connection to Televis EWTD system via terminals 19 gnd 20 21 INSTRUMENT POWER SUPPLY power input terminals 9 and 10 Take note of the instrument label for the rated power supply voltage 4 PARAMETE
7. and it is at the same time disabled 8 INSTALLATION 8 1 MECHANICAL ASSEMBLY AND WORKING ENVIRONMENT The instrument must be installed on a panel on a 138 x 67 mm hole fastened with the bracket supplied For correct operation the installation environmental temperature must be between 0 e 55 21 Avoid installing in rooms with very high humidity particularly where there is much condensation or dirt There is available on request a protective cover that can be applied to the front panel and capable of offering an IP55 protection rating 8 2 ELECTRICAL CONNECTIONS The operations must be carried out by an expert Always switch off the instrument when working on the electrical connections The instrument is equipped with screw terminal blocks that can be disconnected for connecting the electric wires Use cables with cross section lt 2 5 insert only one wire per terminal for the power connections Make sure that the power supply voltage is in compliance with that specified check the label on the instrument The relay outputs on single contact are clear of voltage Do not exceed the maximum current allowed for the different outputs check on the aforementioned label For greater loads use a contactor of suitable characteristics The temperature probes need no insertion polarity their cables can be extended by using normal twin wire flex the extension has an importance on the behaviour of the instrument
8. 1 disabling of the other steps of the same compressor until it switches off and so on Considering the amount of resources requested it corresponds to the maximum number of compressors 0 standard operation 1 resource saturation nCPC Number ComPressor Chief Identification of the master compressor Permits assigning one of the compressors the role of chief If set to 0 control via the chief is disabled Otherwise the compressor number is set according to the order of connection to the terminal board FtyP Freon TYPe The type of refrigerating gas used in the plant The refrigerant must be set for the conversion of the temperature pressure data carried out by the instrument and therefore for optimum System operation 0 134a 1 22 2 R 502 3 404 4 407 5 R 507 6 R 410a PSI Display of the values readings set point parameters in the PSI as unit of measurement enabled all the values are expressed in PSI even for the fan section this case the PSI LEDs and those corresponding to the units previously assigned to the two sections 0 lt unit of measurement selected with dEU 1 values converted to PSI 5 1 2 CONFIGURING THE SUCTION PROBE 10 P04 Pressure at 4 mA Pressure value read by transducer and to be associated with the 4 mA input current quantity for pressure P20 Pressure at 20 mA Pressure value read by the transducer and to
9. available for accessing parameter programming The passwords can be enabled independently for one or more of the following menus compressors oPr Parameter Pso Fan oPr Parameter Pso Compressors CnF Parameter Fan CnF Parameter In the menu selected when display or modification is accessed the label PAS appears if the parameter corresponding to the menu was set press the SET key compose the password by using the UP and DOWN keys e If the password is correct press the SET key and then the UP key ifthe password is not correct programming is automatically exited 8 Attention all the parameters regarding passwords can take on the following values 0 password disabled 1 254 password enabled to the corresponding value the password 255 is also available reserved password THE CORRESPONDING VALUE 255 CANNOT BE COMPOSED 5 LIST OF PARAMETERS Some parameters are referred to the quantity or unit of measurement selected with dEU PSI The corresponding limits and number of decimal places depend on the setting of HEU PSI By varying the setting the values are converted to the new unit of measurement These parameters are defined as quantities below Of these some parameters are available only for the pressure input versions and so are defined for pressure 5 1 COMPRESS
10. for display or modification of compressor state LED of state see OTHER DISPLAYS FOUR DIGIT DISPLAY Displays the value read on the suction probe in the unit of measurement chosen with the dEU parameter It indicates the equivalent values in the other units corresponding measuring unit LED Signals the duration of operation of each compressor identified by is respective LED with LED HRS ON by pressing the HRS key Finally it also displays the setpoints set as well as the two parameter menus regarding the compressors The quantities values of readings and parameters are represented with different resolutions see TECHNICAL DATA If an alarm is on normal display alternates with the display of the alarm code 2 2 FAN SECTION 2 2 1 CONTROLS PRG KEY Parameter programming key Accesses two distinct menus opr and cnf and to end the programme SET KEY This is the key for displaying the settings for normal and reduced work and the programming parameters UP KEY key for increasing the values DOWN KEY key for decreasing the values SET KEY key for displaying the work setpoints according to the normal set reduced set succession each in different display units The corresponding LED always signals which set is active SET N or SET R LED During programming it permits access to the parameter value displayed and confirmation of any settings entered 2 2 2 DISPLAY ALARM LED Signals alarm ON
11. lt lill EWCM 900 technical user manual WCM900 S compressors fans manager electronic controller for compressors and fans 783 LINTRODUC TON kaa A 5 ye eleme DR 5 1 2 GENERAL CHARACTERISTICS eee rab ade caca casi rok si be 5 2 USER INTERFACE cette tentata 6 2 1 5 6 2 weis pg loh 6 2 10 21 05 6 2 2 FAN SECTION ieu eee e iei 6 22 1 S descen tea a ie eate cree 6 2 2 2XDISBLA mmc E 7 2 3 OTHER sl 7 3 DIGITAL INPUTS AND OUTPUTS ccsssssssssssssssssssssssssssssssnsssssssssnssnsessasssnansseeseessansnseeeaessnan 7 3 1 DIGITAL INPUTS ic oto ces ore eel cus ccce ora dio 7 31 1 ALARM INPUTS carie Ld dde ede el ka e Ee ee deu dede 7 Eaedem t 7 3 2 ANALOGIG INPUTS reiten ke kwi eran cas aba k b k ou de awa ele 7 3 3 OUTPUTS ON RELAY os tise 8 3 4 OTHER CONNECTIONS ois cence each 8 4 PARAMETER 8 4 1 SELECTING THE MENU cie 8 4 2 PARAMETER DISPLAY AND MODIFICA
12. 27 will be assigned one for each compressor to three compressors with two capacity steps partilisations 7 2 PROBE FAILURE ALARM This consists in a connection or functional defect of the suction or delivery probes This is displayed on the left and right hand displays respectively with the message 01 It is controlled by the parameters CPP SPr suction compressor section and FPP FPr delivery fan section that guarantee specific use of the resources Automatic reset the resources are enabled according to the parameters mentioned 7 3 ALARMS FOR SETTING THE OPERATION LIMITS This consists in overcoming the operation limits which means too high a pressure delivery or too low in suction It is controlled by the parameters HAL LAL Silencing is permitted The cases e Low pressure alarm value measured by the probe during suction is less than set LAL Signalled on the left hand display with message 03 This alarm is reset automatically when the value measured exceeds set LAL 2 deviation less than half of LAL e High pressure alarm value measured by the probe in delivery is greater than set HAL Signalled the right hand display with message 04 Automatic reset when the value measured decreases below set HAL 2 deviation less than half of HAL 7 4 OTHER ALARMS Mistaken programming of the clock see parameters Pri HoUr and dAY
13. 5 seconds high pressure alarm input normally associated with the delivery condition All the corresponding outputs to the compressors are disabled All the outputs regarding the fans are enabled For a generic triggering of the pressurestat there is no signalling on the display resetting is automatic When the number of pressurestat triggerings are equal to PEn in the time PEI it is signalled on the left hand display In that case resetting is manual the MUTE key must be pressed for more than 5 seconds 7 1 2 RESOURCE ASSOCIATED ALARM Terminals from 22 to 43 parameter ALIP The protections regarding the compressors and fans are connected to these inputs If one of the protections trip for example for lack of oil in the compressor overheating etc the corresponding output will be disabled the cases are Alarm regarding the compressor red LED corresponding to the compressor flashing and the ALARM LED on continuously on the left hand display appears 02 alternating to the probe reading Alarm regarding the fan yellow LED corresponding to the fan flashing and the ALARM LED on continuously On the right hand display appears 02 alternating to the probe reading If the alarm is silenced ALARM LED flashes The alarm is reset automatically The alarm inputs count are based on the number of compressors not the number of steps Example the first three alarm inputs 22 23 24 25 26
14. AY AND MODIFICATION Normal Setpoint this is the steady work setpoint e Reduced Setpoint this is the work setpoint that can be set in those moments of less involvement of the plant e g during night hours and on holidays and so save energy Press and release the SET key to display the normal setpoint in the unit of measurement chosen as standard in the parameters programming phase Press the SET key repeatedly to display the normal setpoint consecutively in the different units of measurement and then the reduced setpoint in the different units The selection of the type of unit of measurement is indicated by the Bar or PSI or or LED switching on The active setpoint is indicated by the corresponding pilot LED switching on LED N Normal and LED R Reduced To modify the value of the setpoint displayed press the UP and DOWN keys directly The following paragraphs describe some procedures regarding the compressor and fan states Note that for the compressors the operation duration is referred to the whole compressor whereas the states of the resources and maintenance are referred to the compressor with its stepped capacity partialisation if present Example two compressors each with two stepped capacity partialisation total 3 3 steps set as resources 1 6 see fig 2 Displays regarding the resources for the duration of operation 1 4 red LEDs for the state of maintenance 1 red combi
15. IONS Pressurestat alarms Regarding the minimum pressure pressurestat ko terminals 5 6 Regarding the maximum pressure pressurestat Probe failure alarm Probe damage suction or delivery automatic the resources are enabled Parameters CPP SPr PoPr suction according to the parameters named compressor section e EPP FPr delivery fan section Other digital input alarms Regarding compressor and fan protection automatic devices Entails disabling the resource compressor with possible steps or fan to which the alarm is referred Alarms for setting the operation limits Low pressure alarm if the value measured by the Automatic resetting when the value probe is less than set LAL measured exceeds set LAL 2 deviation less than half of LAL Silencing no resetting High pressure alarm if the value measured by the Automatic reset when the value probe is greater than set HAL measured decreases below set HAL 2 deviation less than half of HAL Silencing no resetting Other Alarms 11 Mistaken programming ofthe clock Setclock ____9_9__ 12 Mistaken programming ofthe parameters ___ 13 Instrument self diagnosis alarm Request for maintenance See parameter Set the number of operation hours to The compressor in alarm is signalled with the zero for the compressor in question corresponding resource LED flashing red
16. OR SECTION CONFIGURATION PARAMETERS 5 1 1 PLANT DIMENSIONING CPnU ComPressor NUmber Number of compressors present in the plant CtyP Compressor TYPe Type of compressor and regulation A distinction is to made between machines having the same power homogeneous or not since in the different cases the type of regulation available changes e neutral zone regulation selected for compressors with differing power not with capacity stepping partialisation proportional band regulation it is selected for the compressors of equal power homogeneous with capacity stepping partialisation In the case of capacity stepping partialisation non homogeneous compressors both regulations are possible neutral zone preferable with a few high pressure compressors proportional band permits greater regulation precision even though it entails frequent switching on and switching off of the compressors 0 compressors of different power neutral zone regulation 1 homogeneous compressors proportional band regulation Notes 1 With proportional band regulation with homogeneous compressors it is possible to e Disable the steps to force saturation of the resources see parameter sat e Control switching on and switching off to distribute the resources standard mode preferentially a step of the enabled compressor is entered first then a step of the compressor enabled second and so on Considering the amount of resou
17. R PROGRAMMING 4 1 SELECTING THE MENU The following are the parameter menus e Operative oPr for compressor section e Operative for fan section e Configuration for compressor section e Configuration CnF for fan section In the text the relative path is described as section menu or section parameter Access to the menus e Compressors oPr press and release the key PRG and then the key UP corresponding to the section Fan oPr press and release PRG and then UP regarding the section Compressors CnF press PRG twice and then UP regarding the section e Fans CnF press PRG twice and then UP regarding the section To quit programming press the key PRG once more storing in memory is automatic If the password regarding the menu has been enabled access to the corresponding parameters is prevented display 5 See ENABLING FOR PROGRAMMING 4 2 PARAMETER DISPLAY AND MODIFICATION After having entered the required parameter menu the following operations can be carried out using the corresponding section keys e scroll through the parameters press the direction keys UP or DOWN e display the parameter value press SET e modify the value displayed press the direction keys UP or DOWN once more exit parameter modification press the SET key again 4 3 ENABLING FOR PROGRAMMING There are four passwords
18. TION 8 4 3 ENABLING FOR PROGRAMMING ka aa nnnm nnnm nnns nnn nanus inania sn sa 8 LIST OF PARAMETERS m eal HE RUE 9 5 1 COMPRESSOR SECTION CONFIGURATION PARAMETERS 9 5 11 PLANT DIMENSIONING 5 5 OS Di ou 9 5 1 2 CONFIGURING THE SUCTION 10 5 1 3 CONFIGURING OTHER INPUTS 11 5 2 OPERATIVE PARAMETERS OF THE COMPRESSOR 11 5 2 1 INTERNAL CLOGCK 11 5 2 2 COMPRESSOR REGULATION 5 11 5 2 3 WORK SET POINT mon on k COUR QE 13 5214 UBL 13 5 2 5 USER INTERFAGE 2 5 cusa cba i on ze Dag aba cob 14 5 2 6 REMOTE MANAGEMENT TELEVIS EWTD 5 14 5 3 FAN SECTION CONFIGURATION PARAMETERS 14 5 3 1 PLANT DIMENSIONING ceases insana cna sisti ssa sana e sadi dana sana 14 5 3 2 DELIVERY PROBE CONFIGURATION
19. a controller dedicated to controlling the compression and condensation phases by managing the compressors and fans for applications in refrigeration plants The instrument controls more than one compressor of the reciprocating type even with different powers and stepped capacities partialisations simple homogeneous units no power fractionating multiple stage homogeneous units multiple stages with the same power simple non homogeneous units Furthermore it is also possible to control the fans of the condensing unit The instrument can control the resources fans compressors with respective steps by using 11 relay outputs assigned by configuration 1 2 GENERAL CHARACTERISTICS 900 is available in the versions for pressure or temperature input both having the same type of control and regulation The inputs detect the conditions of the compressor section suction and the fan section delivery e Pressure transducers with 4 20 mA current signal of type EWPA 007 030 e Temperature probe with NTC type sensor e Compressor and fan control 11 outputs on relays for controlling the resources condensation fans and compressors with corresponding alarm inputs energised e Resources enabled according to a fixed sequence or rotation to equalise the operation times or the resources e Alarm detection through digital from pressurestats and resources and analogic from probe or transducer inputs for both section
20. be associated with the 20 mA input current quantity for pressure CAL CALibration Calibration of the transducer or probe reading quantity 5 1 3 CONFIGURING OTHER INPUTS SEP SEt alarm Polarity Alarm input polarity terminals 5 and 6 It determines the state of contact for the pressurestat associated with low pressure signalling corresponding to the triggered alarm 0 alarm in the absence of voltage 1 alarm in the presence of voltage rSIP Reduced Set Input Polarity Reduced setpoint input polarity terminals 13 and 14 It determines the state of the contact corresponding to the reduced setpoint mode enabling 0 z reduced setpoint active with contacts open 1 lt reduced setpoint active with contacts closed ALIP ALarm Input Polarity Polarity of the alarm inputs associated with the resources compressors and fans terminals from 22 to 43 It determines the state of the contact corresponding to the triggered alarm 0 alarm in the absence of mains voltage 1 alarm in the presence of mains voltage StPP STep outPuts Polarity Polarity of the outputs for the capacity valves It determines the state of the relays associated with the capacity valves only for homogeneous stepped capacity partialised compressors 0 valve connection step enabled if the contact is closed and viceversa 1 valve connection step enabled if the contact is open and viceversa The relays associated with the compres
21. ding LED SET or SET During programming it is used to access the parameter value displayed and to confirm any setting done UP KEY Any setpoint or parameter values displayed can be modified with it by increasing the value the value is displayed it shows the conversion sequence of the value in the different units of measure If the parameter menu label is displayed it scrolls the list of parameters DOWN KEY Any setpoint or parameter values displayed can be modified with it by decreasing the value If the value is displayed it shows the conversion sequence of the value in the different units of measure MUTE KEY this is the key for silencing and cancelling alarms as well as for zero setting the compressor operation time 2 1 2 DISPLAY LOCK LED keyboard lock signal modifications not enabled ALARM LED alarms triggered signal LED for UNIT OF MEASUREMENT 3 PSI LED indicates the unit of measurement regarding the current display pressure Bar PSI temperature C F HRS LED signals the compressor operation time display in hours SET N LED ON when the normal setpoint is enabled flashes when the normal setpoint is being set or displayed SET key pressed 1 SET R LED ON when the reduced setpoint is enabled flashes when the reduced setpoint is being set or displayed SET key pressed 1 PRG LED flashes when programming is in progress after pressing the PRG key MAINT LED ON
22. eeds the corresponding set limit tAo Time Alarm Override Delay before signalling the minimum or maximum alarm SEr SERvice Interval for service maintenance request This is the duration of operation after which the compressor request for service maintenance is automatically signalled The compressor in question is excluded from operation The interval set is common to all compressors PEn Pressurestat Errors Number Number of times the low pressure pressurestat should be triggered in the interval defined by PEI before an OL alarm condition is triggered If set to 0 the pressurestat error function is overridden emo 13 Pressurestat Errors Interval time Time interval in which to count the times the suction pressurestat has been triggered see parameter CPP Compressor Probe Protection It determines how the compressors are controlled in case of faulty suction probe signalling 01 0 maintaining the resources entered at the moment of the failure 1 entering the resources established by parameters SPr and PoPr Note CPP 1 the number of designated steps is enabled with parameter SPr only to regulate the proportional band homogeneous compressor or the resources corresponding to the selected power with parameter PoPr only for neutral zone regulation SPr Step PRobe protection Number of steps to be entered if the suction probe is faulty if proportional band regulati
23. electromagnetic capabilities great care must be taken with the cables For the pressure transducers respect the insertion polarity It would be best to use transducers capable of accepting a non regulated power voltage In particular it is advisable to use the EWPA 007 and 030 transducers for measuring the high pressure delivery and low pressure suction sections Serial connection for Televis EWTD pay particular attention to the electromagnetic interference It is advisable top use Belden type screened twin flex The probe cables transducers and serial connections must be separated from the wires of the relay contacts and from all parts with dangerous voltage in general by using insulation and distances that guarantee at least double or reinforced insulation For electromagnetic compatibility it would be advisable to do the separation by using separate insulating ducts and proper fastening methods for the cables 9 PERMITTED USE For safety reasons the instrument must be installed and used according to the instructions supplied in particular under normal conditions parts bearing dangerous voltages must not be accessible The device must be suitably protected from water and dust and must also only be accessible by using a tool except the front panel The device may be incorporated in appliances or plants used for refrigeration and it has been inspected under the safety aspects according to the European Equalised Regulations used
24. er Description Interval and default Unit of measurement En Number of fans 10 4 Pressure corresponding to 4 from transducer 0050 __95 ____ _____ Only pressure rer d Pressure corresponding to 20 mA from transducer 8s 3 Only pressure L Quantity Calibration of temperature probe or pressure transducer 0 5 05 00 2 For press 50 PSI transd Quantity C F For temp probe pn SEP alarm input polarity 01 ____1 Number parameters password si Number value 255 must not Configuration parameters index reserved U VO Hp OPERATION PARAMETERS Parameter Description Interval and default Unit measurement for display mz Li oo Proportional band don Startup delay between two resources 2 255 Seconds Minimum setpoint value HSE Maximum setpoint value LSE 25 5 Bar Quantity LAL Minimum pressure alarm 0 01 25 5 Bar Quantity PSI 17 Maximum pressure alarm 0 01 25 Quantity Number of pressurestat triggerings before alarm 1510 Number signalled 2 jPressurestat triggerings count interval 0 15 t5 Minutes FPE Siste of fans for damaged probe numb Number of fans for damaged probe Onin 4 6 OPERATION 6 1 SETPOINT DISPL
25. for reference It may be classified According to its construction as an automatic electronic standalone control device to be incorporated in a plant According to its automatic operating features as a control device 1 BY type As a Class A device according to the class and structure of the software it uses 10 USES NOT ALLOWED Any other use different from that allowed is prohibited We point out that relay contacts are of the functional type and therefore subject to breakdown Any protection devices required by the rules concerning this product or dictated by common sense due to obvious safety reasons should be applied outside the instrument 11 RESPONSIBILITY AND RESIDUAL RISKS Eliwell Invensys Climate Controls Italia is not liable for any damages deriving from installation use different from that intended and in particular not conforming to the safety standards prescribed by the regulations and or herewith given in this technical sheet use on appliances that do not guarantee adequate protection against electrical shock water and dust under the conditions of assembly realised use on appliances that allow access to dangerous parts without the use of tools or without warnings 22 tampering with and or alteration of the product installation use in appliances not conforming to the standards and dispositions of the laws in force 12 TECHNICAL DATA Container in black Noryl plastic material extingui
26. ically forced to 1 if compressors of different powers have been selected CtyP 0 Note 2 Connect the compressor and its capacity stepping partialisations occupying in sequence the positions on the terminal block Example with a number of compressors CpnU 2 each with steps CPSt 3 the relays must connected as below Fig 2 Resources sequence of connection to the terminal block Valve 2 of compressor 2 Valve 1 of Valve 1 of compressor 1 compressor 2 rot compressor ROTation Control using compressor rotation It permits choosing among the following ways of insertion e fixed sequence enabling of the first compressor of the sequence insertion of the steps of the first compressor if present enabling of the second compressor and so on rotation depending on the duration of operation switching on of the compressors in increasing order enabling of the compressor with minimum operation insertion of the corresponding steps if present enabling of the second compressor in terms of duration of operation The purpose is to balance the number of hours of operation 0 fixed sequence 1 compressor rotation sat compressor SATuration Control through resource saturation It enables the saturation algorithm only for homogeneous capacity partialised compressors The disable sequence is disabling of the step of the last enabled compressor if rot 0 or the one with more hours of duty if rot
27. irst compressor is displayed The state is indicated on the display as follows onLn on Line compressor available oFLn oFf Line compressor in maintenance Press the UP key within 5 seconds to pass to the next compressors The red LED flashing state of the compressors indicates which compressor has been selected After the display of the last compressor press the UP key to display the states regarding the fans 6 4 2 MODIFICATION The state of the compressor selected is modified by pressing the MUTE key for more 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 for each compressor by the flashing of the corresponding red LED and the green LEDs regarding the capacity stepping partialisation if present The output is always disabled when the compressor is in maintenance 6 4 3 FANS After the display regarding the last compressor press the UP key again to display and if necessary modify the states regarding the fans as at the preceding paragraph 7 DIAGNOSTICS The following conditions are signalled by the LEDs switching on and messages appearing on the display as will be explained in detail The messages displayed on the left compressor section are preceded by the abbreviation Er Those displayed on the right fan section are preceded by E If a
28. ista sena iaaa arua dn TAE 19 Z DIAGNOSTIGS a a n kk kr a a CA CR 19 7 1 ALARM DIGITAL 1 19 7 1 1 PRESSURE 20 7 1 2 RESOURCE ASSOCIATED 20 1 2 PROBE FAILURE ALARM aa ada na Ra HAN Rad Vo 20 7 3 ALARMS FOR SETTING THE OPERATION LIMITS 20 7 4 OTHER ul ELE 20 7 5 ALARMESILENGING 1 EE 21 7 6 MANUAL RESETTING 2 1 d retos ach dn Ua eda REA RO GR Da 21 7 7 SUMMARY OF THE ALARM 21 8 INSTALLATION D M 21 8 1 MECHANICAL ASSEMBLY AND WORKING ENVIRONMENT 21 8 2 ELECTRICAL CONNECTIONS kan Er IgE 22 9 PERMITTED USE ecu i ade uv p Dp 22 10 Uses not AUG WS a socii nee 22 11 Responsibility and residual risks eere nennen nennen 22 12 TECHNICAL 23 1 INTRODUCTION 1 1 VERSIONS EWOCM 900 is
29. moment of the call so long as the delay from the previous triggering is respected If enabled the triggering of the step is delayed with respect to the call for a value This prolongs all the intervals between connections even in cases of triggering following a condition of equilibrium and first triggering 0 no 1 yes FdLF First DeLay Enables delay between the request for release and the actual disconnection of the step The delay is equal to The behaviour is similar to that of FdLy 0 no 1 yes odo Output Delay at On Duration of compressor output override starting from switch on of the instrument 5 2 3 WORK SET POINT LSE Lower SEt Minimum programming level of the setpoint quantity parameter HSE Higher SEt Maximum programming level of the setpoint quantity parameter StrS Start Time Reduced Set Starting time for the reduced setpoint operation time interval If the parameter is set to 0 operation with reduced setpoint is disabled the normal setpoint is always enabled SPrS StoP time Reduced Set Stopping time for the reduced setpoint operation time interval If the parameter is set to 0 operation with reduced setpoint is disabled normal setpoint is always enabled rSd1 rSd7 Reduced Set Day 1 7 Enabling of the reduced setpoint for each day of the week based on the time interval limited by StrS SPrS The following cases can be distinguished Strs SPr
30. n alarm is triggered the ALARM LED of the section regarding the alarm compressors or fans is on For all alarms the alarm output is enabled terminals 1 and 2 closed 7 1 ALARM DIGITAL INPUTS 19 The digital inputs supply two types of alarm caused respectively by the triggering of the pressurestat 2 inputs and the devices associated with each resource 11 inputs Besides what has been described before appear alarm message on the display of the corresponding section OL appears in the compressor section in the fan section 02 depending on the relationship with the resource e For alarm 02 flashing of the LED associated with the resource red LED for the compressor yellow for the fans 7 1 1 PRESSURE ALARMS Terminals 5 6 and 7 8 Parameters compressors SEP and fans SEP These inputs are connected to the pressurestats assigned respectively to the low and high pressure alarms The alarms generated are OL and OH These cases are distinguished input for low pressure alarm normally associated with the condition in suction All the outputs regarding the compressors and the fans are disabled For a generic triggering of the pressurestat there is no signalling on the display resetting is automatic When the number of pressurestat triggerings is equal to PEn in the time PEI there is a signalling on the left hand display OL In this case resetting is manual the MUTE key must be pressed for more than
31. ned with 2 3 green 4 red plus 5 6 green for the state of the resources 1 2 3 4 5 6 red and green LEDs depending on the type of resource and eventual timings 6 2 DISPLAY OF THE STATE OF THE RESOURCES 6 2 1 COMPRESSORS The connections of the resources are conditioned by the call situation of plant and by the delay parameters In the same way disconnection entails triggering the release of the resource in use and respect of the delays set set the resource connection delay compressor stepped capacity partialisation is signalled by the corresponding green LED flashing that lasts from call to connection Once connected the LEDs stay on continuously e red for the compressors e green for stepped capacity partialisation The delay regarding the release of the resource is signalled by the flashing of the corresponding green LED At the moment of disconnection the LEDs mentioned switch off For alarms regarding digital inputs the LED associated with the compressor flashes with the ALARM LED on continuously and the display showing the alarm code 6 2 2 FANS The connections and disconnections are linked as for the compressors to the triggering in terms of resources needed and the delays set The display is similar to the previous one but only the yellow LEDs are referred to After the call and until connection the LED corresponding to the fan involved flashes If the LED is on continuously the corresp
32. of Invensys Climate Controls Italia s p a Although the greatest care has been exercised in the preparation of this document Invensys Climate Controls Italia s p a and any person or company involved in creating and drawing up this document cannot be retained liable and will accept no liability whatsoever connected with its use Invensys Climate Controls Italia s p a reserves the right to make any changes or improvements aesthetic or functional without prior notice and in any moment 26 Invensys Invensys Climate Controls s p a via dell Industria 15 Zona Industriale Paludi 32010 Pieve d Alpago BL ITALY Telephone 39 0437 986111 Facsimile 39 0437 986066 Email eliwellQinvensysclimate com Internet http www eliwell com An Invensys company
33. on has been set homogeneous compressors CtyP 1 CPP 1 PoPr POwer with faulty PRobe Power to be entered if suction probe is damaged if neutral zone regulation has been set non homogeneous compressors or even homogeneous compressors that are not capacity stepped partialised if CtyP 0 CPP 1 Value according to the proportionality adopted for the parameters PC1 PC11 5 2 5 USER INTERFACE rELP RELative Pressure Selection of absolute or relative pressure display 0 absolute pressure 1 relative pressure Loc keyboard LOCk function It locks the keyboard disabling the following functions Parameter modification Setpoint modification zero setting the work hours counter for the various compressors maintenance Lockout is signalled by the LOCK LED switching on The parameter Loc does remain accessible 0 keyboard enabled for modification 1 keyboard locked Pso PaSsword Operating Password for access to operative parameters see ENABLING FOR PROGRAMMING 5 2 6 REMOTE MANAGEMENT TELEVIS EWTD SYSTEM FAA FAmily Address This is used to set the family code to be assigned to each instrument for recognition in the sphere of the remote management network dEA DEvice Address This is used to set the address code to assign to each instrument for recognition in the sphere of the remote management network tAb TABle of parameters Parameter configuration index set in the factor
34. onding resource is in operation During release the LED flashes for the duration of the delay connected On disconnection the LED switches off 18 If the alarm corresponds to a digital input the LED associated with it flashes with the ALARM LED continuously and the alarm code on the display 6 3 DURATION OF COMPRESSOR AND VALVE OPERATION 6 3 1 DISPLAY Press and release the HRS key the HRS LED switches on and stays on The duration of operation of the first compressor is displayed in hours Press the UP key within 5 seconds to pass to the next compressors The red LED flashes state of the compressors above to indicate which compressor has been selected After the last compressor has been displayed press the UP key again and the duration of operation of the fans is displayed 6 3 2 ZERO SETTING For each compressor zero setting of the time of operation is obtained by holding down the MUTE key 6 3 3 FANS After the display regarding the last compressor press the UP key again to display the number of hours of operation of the fans The duration can be set to zero as explained at the previous paragraph yet for the fans the duration of operation has no effect on the request for maintenance with the consequent disabling see parameter SEr 6 4 AVAILABLE IN MAINTENANCE STATE 6 4 1 DISPLAY Press and release the MAINT key the MAINT key switches on and stays on The state of the f
35. oportional to the p CPSt Number of steps per compressor if homogeneous 1 Number compressors Rotation or fixed sequence 0 Number Sat Satura rt Nba 3 Number Chief compressor 11 _ 0 Number FiyP Type of refrigerating gasused ____________ 0 5 T Pressure display in PSI 1 Number 55 89 os pa Only pressure 0 0 PS Only pressure m Quantity 89 71 8 For press 50 mer Lc F For temp probe Quantity SEP pressurestat alarm input polarity 0 RSP Reduced setpoint input polarity compressor alarm IStPP j Compressorstepsoutputpolarity Number Configuration parameters Password 0 254 Number mn value 255 must not be Pe Tab Gonfiguration parameters index Parameter Description Interval and default Unit of measurement Pri Minutes for clock programming 057 po Hours for clock programming Day for clock programming DEU Unit of measurement for display Amplitude of proportional band or neutral zone Pon en onon Delay between __________ 0 255 5 Mnues _ Delay between switch o and startup don Startup delay between two resources 0 255 Seconds Ko
36. ossible for homogeneous non capacity stepped partialised compressors If the actual pressure or temperature is greater than set Pbd 2 then the compressor call phase starts if less than set Pbd 2 then the compressor release phase starts Inside the neutral zone connections or disconnections of resources are not expected See fig 4 11 Fig 3 4 Proportional band Power Resauces1 2 2 4 5 Resources 1 2 2 4 5 Resources 2 4 Resources 1 2 3 Resources1 2 F Resources 1 No resources pol pressure Li Setpoint Ls dead band Power Resauces1 2 2 4 5 6 Resources tz i 4 5 Resources 2 2 4 Resources 1 2 43 Resources 1 2 Resources 1 No resources pressure 12 onon ON ON compressor The least time between two consecutive switch ons of the same compressor oFon OFf ON compressor The least time between switch off and switch on of the same compressor don Delay ON Delay between consecutive enablings of two different steps or compressors doF Delay OFf Delay between consecutive releases of two different steps or compressors donF Delay ON oFf Minimum duration of compressor operation from connection to the next disconnection FdLy First DeLaY on Enables the delay between the call for a step and its actual enabling The delay is equivalent to don If this parameter is not enabled every step is triggered at the
37. r Felease delay between fwo resources GonF__ Minimum operation time ________________ 255 ___ 5 _________ Faly Enable don for firstdelay _____________ ___ _____ _________ 2547 Enables reduced setpoint for days 1 7 E E Ar Unltof meseurement fox elarm silencing Oi 1 ro _ Alarm silenced time s __________ Alarm override on switch on m 255 Minutes LAL Minimum pressure alarm 5 a OO Quantity pe Pe re C Maximum pressure alarm Alarm signalling delay n ISE _____ Interval for maintenance service request 9999 Number of pressurestat triggerings before alarm is 15 Number signalled PE Pressurestat triggerings count interval i5 CER Suus of compressore Tor damaged probs ET n SPr State of steps for damaged probe 0 CpnU Number Power to connect for damaged probe 0 255 Number According toj the proportionality of PC1 du value PC1 PC11 e Absolute oretatve pressure allay ae Keyboard lock 0 1 Number Operation parameters Password 0 255 Number The value 255 must not be Instrument family for remote management 13 Number EA instrument address for romote management Ab programming index reserved CONDENSER FAN SECTION CONFIGURATION PARAMETERS Paramet
38. rces required it corresponds to the maximum number of enabled compressors See parameter rot e Control switching on and switching off according to a fixed sequence Set the chief role for a designated compressor The chief compressor is enabled first and disabled last in the resource control sequence see parameter Note 2 the chief role can be assigned even in the case of neutral zone regulation with non homogeneous compressors PC1 PC11 Power Compressor 1 11 Parameters for setting the power of the single compressors in case these have different powers available only for CtyP 0 The power is identified by value between 1 and 255 proportional to the power of the compressor Example 1 3 non homogeneous compressors not capacity stepped non partialised of 10 20 and 40 Hp PC1 10 20 e 40 or PC1 1 2 and 4 etc Example 2 4 homogeneous compressors not capacity stepped non partialised if the neutral zone operation is requested CtyP 0 PC1 PC11 the same value must be set PC1 1 PC2 1 PCS 1 1 or any other number CPSt ComPressor STep Number of steps available for each compressor if these are homogeneous and capacity stepped partialised parameter enabled only for CtyP 1 It is the same as the number of capacity valves plus 1 Note 1 The value of this parameter is automat
39. s 0 setting of rSd1 rSd7 the normal setpoint is always enabled the reduced setpoint is always enabled Else setting of rSd1 rSd7 reduced setpoint enabled in the time interval Strs SPrs on the day referred to in parameter rSd1 rSd7 besides the interval the normal setpoint is valid 1 normal setpoint Strs SPrs active enabled besides the interval the reduced setpoint is valid Note rSd1 Sunday rSd7 Saturday 5 2 4 ALARMS UAro Unit AlaRm Override This selects the unit of measurement for the alarm silenced time set by parameter Aro 0 minutes 1 hours Aro AlaRm Override Duration of alarm silenced This is the period following the silencing of an alarm during which the alarm relay is disabled to avoid signalling alarms that are triggered too close to each other PAO Power Alarm Override Duration of alarm override at switch on It is the period starting from instrument Switch on before an alarm is signalled LAL Lower ALarm Minimum pressure alarm This is the value that subtracted from the setpoint value determines the minimum alarm threshold The alarm is signalled as 03 Quantity parameter HAL Higher ALarm Maximum pressure alarm This is the value added to the setpoint value determines the maximum alarm threshold The alarm is signalled as 04 Quantity parameter Note the alarms regarding and HAL are generated when the regulation probe finds a value that exc
40. s based on specific parameters Setting the parameters and display of the operation variables by means of quantities and units of measure that can be user selected pressure Bar PSI in the relative or absolute scale temperature C F e Control of the sections compressors and fans by means of two separate displays three and four digit respectively Two setpoints programmable according to the time period normal and reduced rate e Serial connection for the Televis EWTD system Safety system that carries out a continuous inspection on the operation of the instrument hardware if there is EWCM failure or a power failure the safety relay output is enabled and transfers control of the plant to a device prepared for emergency thus ensuring minimum operation until expert personnel are able to come Fig 1 2 USER INTERFACE 2 1 COMPRESSOR SECTION 2 1 1 CONTROLS PRG KEY parameter programming key It is used to access two distinct menus opr and cnf and to end the programme HRS KEY the key is used to display the time in hours the compressors have been operating MAINT KEY the key is used for displaying or modifying the available or in maintenance state regarding the compressors SET KEY this key displays the setpoints according to the normal set reduced set succession each in the different display units The enabled setpoint is always signalled by the correspon
41. shing rating UL 94 0 Dimensions front panel 72x144 mm depth 120 mm Assembly On panel on a 138x67 mm hole with fastening brackets Protection of front panel IP 54 rating Connections screw type with terminals that can be disconnected Display on two displays 4 digit for compressor section 3 digit for fan section digit height 12 5 mm Dimensions and unit of measurement used temperature C F pressure bar PSI Resolution 0 01 bar 0 1 PSI C 1 F compressor section display 0 1 C 1 PSI F fan section display Precision better than 0 596 of bottom scale Compatibility for refrigerating gas R 22 134a R 502 R 404a R 407 507 410a Analogic inputs 1 suction 1 delivery Compatible depending on model with pressure transducer 4 20 mA current programmable interval or with temperature probe type NTC Digital inputs from pressurestat 1 high pressure alarm 1 low pressure alarm opto insulated live the same voltage as power supply Alarm digital inputs 11 contacts opto insulated live the same voltage as power supply Digital input for reduced setpoint 1 clean contact form setpoint enabling Alarm output on relay 6 3 A 250V AC Safety output instrument damage failure on relay 6 3 A 250V AC Outputs configurable for resource regulation 11 on relay 6 3 A 250V AC Serial port type RS 485 for connection to Televis EWTD Operation temperat
42. sors and probable capacity stepping partialisations LEDs for THE STATE OF THE FANS total 11 yellow LEDs situated above they indicate the operation state of the outputs assigned to the fans PSI LEDs indicate that the unit of measurement for the current display is PSI pounds per square inch It is found near the fan section It is only enabled by parameter setting PSI If enabled all values readings setpoints and parameters of the physical quantity type are expressed in PSI on both displays 3 DIGITAL INPUTS AND OUTPUTS 3 1 DIGITAL INPUTS 3 1 1 ALARM INPUTS The following contacts are live INPUT FROM PRESSURESTAT LOW PRESSURE ALARM for signals from a low pressure alarm depending on the condition of the pressurestat connected to terminals 5 and 6 It is controlled by the compressors SEP parameters Input at the same power voltage INPUT FROM PRESSURESTAT HIGH PRESSURE ALARM for signals from high pressure alarm depending on the condition of the pressurestat connected to terminals 7 and 8 It is controlled with the fans SEP parameters Input to the same power voltage ALARMS 11 inputs protecting the compressors and fans for signals from alarms depending on devices connected to them e g thermal cutout protection connected to terminals 22 to 43 Controlled by compressors ALIP parameters 3 1 2 OTHER INPUTS REDUCED SET for enabling the reduced setpoint by means of a clean not live contact terminals 13 and
43. sors do not depend on the StPP setting 5 1 4 Password and Production Setting Psc PaSsword Configuration Password to access the configuration parameters see ENABLING FOR PROGRAMMING tAb TABle of parameters Index of configuration of parameters set in production cannot be modified by the user 5 2 OPERATIVE PARAMETERS OF THE COMPRESSOR SECTION 5 2 1 INTERNAL CLOCK Parameters for setting the internal clock on which is based the operation according to the normal or reduced setpoint Pri PRImes Sets the minutes of the current time on the internal clock of the instrument HoUr HOURs Sets the current hour on the internal clock dAY DAY Sets the current day of the week on the internal clock Note 1 Sunday 7 Saturday 5 2 2 COMPRESSOR REGULATION dEU DEfault Unit Sets the dimension or unit of measurement used for display reading setpoint parameters 0 bar 1 2 F Pbd Proportional BanD Amplitude of the proportional band and the neutral zone The unit of measurement depends on the setting of dEU quantity The band or zone is symmetrical compared to the work setpoint with extremes set Pbd 2 set Pbd 2 Distinguish cases of proportional band homogeneous compressors CtyP 1 regulation is proportional inside the band connecting or disconnecting the resource according to the power requested See fig 3 e neutral zone compressors of different power CtyP 0 also p
44. ure 0 55 C Storing temperature 30 75 Power supply 220 230 110 115 24 12 V Information on power supply voltage tolerance 10 frequency 50 60 Hz maximum absorbed power 10 VA 23 XATddNS LOdNI ARIV TV FTANSSFTAI MOT LOdNI ARIV TV INIOdLAS w m a d 5 2 m 5 AWAL ASIHATTHG 24 NOLLOHNNOO 5 TEZ SA PROBE INPUT SAFETY RELAY OPEN WHEN INSTRUMENT IS NOT POWERED OPEN FOR DAMAGE OR POWER FAILURE RESOURCE RELAY OF THE TYPE COMPRESSOR CAPACITY VALVE FAN FOR 4 20mA CURRENT FROM PRESSURE TRANSDUCER 1 CPPEEBREDBRDPBDBIIDID T NI NG gt nw rs 2 E 8 dc m 2E zm 2 2 ae an 5 N 5 amp 8 gt S 2 2 Q maw Zo ZE SE ay 5 Zz ZE 265 255 m So 58 22 g fesl E 5 m m OPEN WHEN INSTRUMENT IS NOT POWERED OPEN FOR DAMAGE OR POWER FAILURE RELAY FOR RESOURCE OF TYPE COMPRESSOR CAPACITY VALVE FAN 25 This technical publication is the exclusive property of Invensys Climate Controls Italia s p a who absolutely prohibits its reproduction and distribution without the express authorisation
45. y not modifiable by the user EL1 ELIWELL 1 Parameter that cannot be modified by the user EL2 ELIWELL 2 Parameter that cannot be modified by the user 5 3 FAN SECTION CONFIGURATION PARAMETERS 5 3 1 PLANT DIMENSIONING nFn number of Fans The number of fans the plant has 5 3 2 DELIVERY PROBE CONFIGURATION PO4 Pressure at 4 mA Pressure value read off the transducer to be associated with the 4 mA input current quantity for pressure P20 Pressure at 20 mA Pressure value read off the transducer to be associated with the 20 mA input current quantity for pressure CAL CALibration Calibration of the transducer or delivery probe reading quantity 5 3 3 CONFIGURATION OF OTHER INPUTS SEP SEt alarm Polarity Alarm input polarity terminals 7 and 8 It determines the state of the contact for the pressurestat associated with the high pressure signalling corresponding to the alarm triggered 0 alarm in the absence of voltage 1 alarm in the presence of voltage 5 3 4 PASSWORD Psc PaSsword Configuration Password for access to the configuration parameters see ENABLING FOR PROGRAMMING 14 tAb TABle of parameters parameter configuration index set in production modifiable by the user 5 4 FAN SECTION OPERATION PARAMETERS 5 4 1 FAN REGULATION dEU DEfault Unit Sets the dimension or the unit of measurement used for display readings setpoint parameters 0 bar 1
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