background image

15.DISCHARGE CONTROLS

15.1 Control Modes

The Discharge Control Mode (

1.3.x.1

) defines the preference of fans actuation and shutdown. To control the discharge, the 

RCK-862

 

plus

 has 

the following control modes: Linear Mode, Rotation Mode, Dead Zone Mode, Dead Zone Mode with Rotation.

15.2 Types of discharge control

The discharge control can be carried out by monitoring the pressure or temperature variable. The type of control is adjusted according to the variable to 
be used in the parameter Type of control (

1.3.x.2

).

Pressure

:  When  configuring  the  Control  Type  (

1.3.x.2

)  for  pressure,  the 

RCK-862 

plus

  uses  the  parameters  related  to  pressure  of

 

1.3.x.6

 to 

1.3.x.10

. In this type of control, a temperature sensor (

1.3.x.21

) can also be added to monitor the condenser refrigerant outlet 

temperature (sub-cooling calculation).

Temperature

: When configuring the Control type (

1.3.x.2

) for temperature, the 

RCK-862

 

plus

 uses the parameters related to temperature 

1.3.x.11

 to

 1.3.x.18

.

15.2.1 Linear Mode
15.2.1.1 Linear Mode linked only with digital fan outputs ON I OFF

Linear mode, when it only has digital outputs linked, controls the actuation and shutdown of each fan sequentially and with pressure / temperature 
intervals of the same magnitude (step).
The 

RCK-862

 

plus

 uses a setpoint value and pressure or temperature hysteresis (depending on the type of control) to control the discharge.

Actuation Pressure value of the ‘’N’’ Output Actuation = Se (N x Step)
Shutdown Pressure value of the output ‘’N’’ Actuation = Se (N-1x Step)

In this case, each fan is associated with a digital output and the step is defined as 60/6 = 10 psi.

Step for activating the outputs

Step =

Digital hysteresis

Number of outputs

250

260

270

280

290

300

310

(psi)

F1

F1 + F2

F1 + F2 + F3

F1 + F2 + F3 + F4

F1 + F2 + F3 + F4 + F5

F1 + F2 + F3 + F4 + F5 + F6

OFF

Outputs

Pressure value for output ‘’N’’ actuation

Pressure value for output ‘’N’’ deactivation

Activation = Se (N x Step)

Activation = Se (N-1 x Step)

Example:

1.3.x.1

  Control mode: Linear

1.3.x.3

  Setpoint: 250 psi

1.3.x.5

  Hysteresis of digital outputs: 20

1.3.x.24

  Number of fans: 6  

1.3.x.25

  Fan 1 modulation: without modulation  

1.3.x.39

 Integral Time: Off                                                      

15.2.1.2 Inverter-modulated fan:

The control of fans with frequency inverter uses an analog output (0-10V).
Only fan 01 of each discharge line can be configured as an inverter. During operation, the inverter-modulated fan is the first to be actuated and the last to 
be shutdown. Example: In item 

1.3.x.25

 o ‘’Modulation of fan 01'’ as ‘’Inverter’’ and select an analog output for the Inverter. You can select a digital 

output for the start/stop function by selecting a digital output in the parameter Fan Digital output (

1.3.x.27

). 

The working values of the output (maximum, minimum and start) can be configured in the menu Analog outputs 

1.10

.

Integral actuation can be selected together with proportional (PI mode) using the parameter Integral Time (

1.3.x.39

).

Note:

 When more than one fan is controlled by only a single proportional output, the number of fans (

1.3.x.24

) is set to 1 and Compressor 

Modulation (

1.3.x.25

) as Inverter.

28

Содержание RCK-862 plus

Страница 1: ...RCK 862 plus RCK 862PLV01 01T 18387 Suction Control Discharge Control Recipe System Progressive Algorithm Floating Condensation Hour meter Supervisory System OLED Graphic Display Alarms USB...

Страница 2: ...APACITYCOMPRESSORS VCC 21 14 3 1VCC ANALOG 21 14 3 2VCC DIGITAL 21 14 4 CONTROLMODES 22 14 4 1 LINEARMODE 22 14 4 1 1LINEARMODELINKEDONLYWITHDIGITALOUTPUTS COMPRESSORSON OFF UNLOADERS 22 14 4 1 2LINEA...

Страница 3: ...CONTROLSTATUS 36 17 ALARMS 37 17 1ALARMVIEW 37 17 2AUTOMATIC RESETS 38 17 3OUTPUTSIGNALING 38 17 4ALARM TABLES 39 17 4 1SYSTEMALARMS 39 17 4 2 SUCTIONALARMS 39 17 4 3 DISCHARGEALARM 40 17 4 4 INDIVID...

Страница 4: ...er ofinputsandoutputsinlargesystems The RCK 862 plus has advanced control logic to optimize thermal performance and reduce the energy consumption of the cooling system The proportional integral contro...

Страница 5: ...isintervalisbelowthesetpoint VCC Digital Compressorwhosecapacityismodulatedthroughtheactuationofdigitaloutputs SSRs tocontrolunloadersvalves Decompression Pressurecontrolwherethehysteresisintervalisab...

Страница 6: ...um consumption 24Vac 50 60Hz or 24Vdc 10 Operating humidity Type action Voltage output for pressure sensors Analog outputs Analog inputs Digital inputs Control pressure Pollution degree Pressure resol...

Страница 7: ...interface as shown and fit the top part 7 INSTALLING THE RCK 862 plus To remove the controller from the DIN rail use a wrench compatible with the size of the lock to make alever 3 21 1 80 110 mm 4 33...

Страница 8: ...ectors use a Philips 1 or flat 3 0mm Screwdriver Do not exceedthemaximumtorqueof5 0Nm Type 2 connector For type 2 connectors 3 5mm use a Philips 0 or flat 2 4mm Screwdriver Do not exceedthemaximumtorq...

Страница 9: ...ey Increasesvaluesandnavigates up inMenus DECREASEkey Decreasesvaluesandnavigates down intheMenus BACKkey Returnstothepreviousscreenwithoutconfirmingaparameterchange ALARMkey Accessthedisplayofactivea...

Страница 10: ...Status de controle Rearme 1 Main menu 1 Configura es de fun es 2 Configuracoes do sistema 3 Configura o de comunica o 1 1 Settings 1 Groups 2 Suction 3 Discharge The BACK key is used to return to the...

Страница 11: ...n 2 20 0 psi On 3 30 0 psi On Discharge 1 310 0 psi Al M Gr1 DD MM HH MM SS 1 2 3 4 5 7 8 6 1 2 3 4 5 6 7 8 Auxiliaryindications M Atleast1compressororfaninmaintenance Eco Whentheeconomysetpointisacti...

Страница 12: ...ting 5 0 C Req 100 Out 100 Suc1 Suc1 On Eco Pd M Eco Activeeconomysetpoint Pd In the process of Pump Down M Atleast1compressorinmaintenance Indication of active alarm Out Percentage of power referring...

Страница 13: ...more information see section 18 Main cc cc Menu Function1 1 3 ddd Setpoint 300 0 psi Pres 330 0 psi Temp 50 0 C Subcooling 5 0 C T Ext 38 0 34 0 C Req 100 Out 100 Dis1 On Eco Pd M Req Percentage of po...

Страница 14: ...sSS 1 2 3 4 For fans with modulation the SS symbol represents the status of the Start Stop output When this output is activated it is represented with awhitebackground This value represents the percen...

Страница 15: ...d indicate that the respective output is active In this example output 1 and 2 are off and outputs 3 4 5 and6areon 12 SUMMARY SCREEN 12 5 Invidualpressureswitches Theindividualpressureswitchscreensare...

Страница 16: ...status Defrost output status Operationmode A heating R refrigeration Controltemperaturevalue Temperaturesetpoint 12 SUMMARY SCREEN 12 6 Individualthermostats Theindividualthermostatscreensareaccessedf...

Страница 17: ...theselecteditem 1 2 Indicatesthestatusorvalueoftheinput Indicates which equipment and item are being viewed 12 7 Inputsandoutputs The input and output menu allows you to view the status of all inputs...

Страница 18: ...nthermostats ThermostatinformationisaccessedfromtheControlMenu Totogglebetweentheavailablecompressorsjustnavigateusingthekeys and 12 9 Rotationoutputs Itallowsviewingthestatusoftheoutputsofthesetsofro...

Страница 19: ...ndicating the sensor reading value the statusofthedigitalinputsandcontroloutputs Maintenance Compressors or fans are viewed and selected to enter maintenance mode When the equipment is in the maintena...

Страница 20: ...50 I 75 I 100 Modulation ON OFF 25 I 50 I 75 I 100 Modulation ON OFF 25 I 50 I 75 I 100 Modulation ON OFF 25 I 50 I 75 I 100 Modulation ON OFF 33 I 66 I 100 Modulation ON OFF 50 I 75 I 100 Modulation...

Страница 21: ...or actuates one of its modulation valves increasing the flow of refrigerant in the compressor for the same time configured in 1 2 x 72 Acompressorstarttimecanbeconfigured accordingto Note Re balanceas...

Страница 22: ...ters1 2 x 34 and1 2 x 35 The digital outputs are linked with the compressors in the Main Menu 1 Function settings 1 2 Suction cc c The RCK 862 plus defines the actuation and shutdown points according...

Страница 23: ...compressor is the first to be actuated and the last to be shutdown There is a validation time 1 1 x 68 for starting or stopping compressors or unloaders valves when the compressor reaches its upper o...

Страница 24: ...actuated by PWM solenoid valves The control uses the parameters of the setpointvalueandthehysteresisoftheVCCcompressor Example Compressorwithmodulationin2valveswith50 capacityeach 1 2 x 1 Controlmode...

Страница 25: ...e values for the activation of compressors 1 2 and 3 should be respectively 34 0 38 0 and 42 0psi Considering the effect of the dead zone no compressor should be activated until the pressure exceeds 4...

Страница 26: ...ompressor 1 is configured as VCC it is the first to be activated and the last to be shut off ProgressiveAlgorithmModeusessetpointandasinglehysteresis APcontrolmodehysteresis Applicationexample 1 2 x 1...

Страница 27: ...eofintegralactiontogetherwithproportionalcontrolhastheobjectiveofkeepingthecontrolpressurestable convergingtovalues closetothesetpoint Applicationexample The integral action can be used in all control...

Страница 28: ...ueofthe N OutputActuation Setpoint NxStep ShutdownPressurevalueoftheoutput N Actuation Setpoint N 1xStep Inthiscase eachfanisassociatedwithadigitaloutputandthestepisdefinedas60 6 10psi Stepforactivati...

Страница 29: ...n be viewed in the control menu in the Hour meter option In this same menu it is possible to reset one selectthecompressorandpress orall hold for2seconds timerecords ddd ddd As a fan with Inverter mod...

Страница 30: ...tputs Toactivatetheintegralaction simplyset avalueotherthanOffoutputs Toactivatetheintegralaction simplysetavalueotherthanOffintheparameterIntegraltime 1 3 x 39 Thehighertheconfiguredvalue thesloweran...

Страница 31: ...d off In this casem a normally closed solenoid valve can be used to control the passage of the refrigerant To configure Pump Dow access menu 1 7 1 The allows shutdown with Pump Down to be done manuall...

Страница 32: ...1 6 x 1 Pressureswitch Suction1 1 6 x 2 Inputfunction ActivatesPumpDown 1 6 x 4 Digitalinputaddress I2 IndividualThermostat 1 7 6 x 1 Operatingmode Cooling 1 7 6 x 2 Temperaturesetpoint 5 C 1 7 6 x 7...

Страница 33: ...ing one or two sensors or exclusively by time acting by means of a cycle timer time on and time off The control is permanently active if its Control Mode 1 7 3 x 1 isnotdeterminedusingtheStarttime 1 7...

Страница 34: ...reforshutdown 1 7 3 x 2 1 6 3 1 3Temperaturecontrolusingtwosensors TBS TBUDifferentialandTemperatureLimit When the four parameters Temperature for activation 1 7 3 x 2 Temperature for shutdown 1 7 3 x...

Страница 35: ...rding to the air temperature value To use the logic a pressure sensor must be configured for the discharge a temperature sensor for measuringtheexternaltemperatureandatemperaturesensorforcalculatingth...

Страница 36: ...s linkedtothethermostatintheparameterlinkedPressureswitch 1 7 6 x 7 ThepressureswitchwillonlyenterPumpDownwhenallthermostats connectedtothatsuctionareshutoff 16 7Outputswithrotation TheRCK 862plusallo...

Страница 37: ...rm whichpressureswitchtheoccurrencewason starttimeandtimetheeventstopped Todeletethealarmrecords itisnecessarytobeviewingthealarmhistorylist pressandholdthe keyfor3secondsandconfirmtherequest dddd 1 5...

Страница 38: ...gether with the visual alarm Theactivationmodeofthisalarmoutputcanbeswitchedonorcycling In the event of a protection alarm it will be checked if 3 other alarms of the same type have occurred within th...

Страница 39: ...essor safety input 3 Compressor safety input 6 Low pressure digital input Backup pressure sensor fault AL0x13 AL0x08 AL0x17 AL0x14 AL0x09 AL0x18 AL0x15 AL0x10 AL0x16 AL0x11 AL0x06 AL0x12 AL0x07 Compre...

Страница 40: ...schargepressureswitches1 2or3 respectively Example AL0x01 4 Referring to Discharge 1 5 Referring to Discharge 2 6 Referring to Discharge 3 17 ALARMS Alarm Effect Description External alarm 6 External...

Страница 41: ...for fan 4 Maintenance time for fan 5 Maintenance time for fan 6 Adiabatic condensation validation time Indicative alarm Indicative alarm Indicative alarm Indicative alarm Indicative alarm Indicative...

Страница 42: ...senting the individual thermostats1 2 3 4 5or6 respectively Example Shut off the output Temperature sensor fault ALxx03 Alarm Effect Alarm Effect Description Description ALxx01 AL1901 ALxx02 AL1902 AL...

Страница 43: ...er Enable display eco mode Pressure measurement unit 2 1 System Expansion model address 2 Expansion model address 3 Expansion model address 4 Expansion model address 5 Expansion model address 1 4 1 Ex...

Страница 44: ...yed Note If the pressure read by the sensor is equivalent to a region outside the sub critical the message PC is displayed indicating that the valueisabovethecriticalpoint Note WhenECOmodeisactive jus...

Страница 45: ...thecablescreen dd RCK 862 plus A B Keep Sitrad update at site http www sitrad com 18 3 2CommunicationMODBUS The RCK 862 plus is compatible with the standard MODBUS RTU protocol For information on the...

Страница 46: ...le shield screen with a minimum diameter of 24AWG or0 5mm Whenconfiguringtheexpansions theRCK 862 plusautomaticallyexpandsthepossibleinputandoutputoptionsforselection Example Base O1 Base O2 Base O6 E...

Страница 47: ...productmodel AA year MM month DD day HH hour MM minute SS second Example ArecipeexportedonanRCK 862plus on08 02 2019at13 30 00willhavethenameRCK 862_190802_133000 rec 18 5 2Importrecipe RCK 862plus Pe...

Страница 48: ...sharing the same discharge line forms a group composedofthreepressureswitches 1 1 1 InitialDelay Itisthetimethatthecontrollerwaitsbeforeenablingthepressureswitcheswhenthecontrolisactivated Thedischar...

Страница 49: ...sec Psi Bar Psi Bar Psi Bar Psi Bar Psi Bar 30 0 2 1 0 0 59 off 6 0 0 4 10 0 0 7 10 0 0 7 0 0 0 425 0 29 3 425 0 29 3 425 0 29 3 0 0 0 0 0 0 0 0 0 19 PARAMETER TABLE 1 1 2 Numberofsuctionpressureswit...

Страница 50: ...VCC Validation time Minimum time compressor off VCC Digital Maximum no load time Time between compressor actuation VCC Digital Minimum capacity Compressor 3 Auxiliary output 1 Time between unloaders a...

Страница 51: ...es the Proportional Integral PI control for the compressors The value of this parameter corresponds to thetimeinwhich100 ofthecontrolerrorisaccumulated suctionpressure setpoint Thisvaluemustbeconfigur...

Страница 52: ...iaryoutputsoff Applicationexample BitzerCRIIcompressors VCC Digital 10 100 3V Compressor of variable capacity that uses one main output relay for its actuation plus three auxiliary outputs SSR for cap...

Страница 53: ...I 66 I 100 that uses one main and two auxiliary outputs The time between shutdowns of two auxiliary outputs 66and100 mustbegreaterthanthetimebetweenshutdownsofunloaders 1 2 x 67 VCC Startuptime Itist...

Страница 54: ...200 0 392 0 200 392 0 C F C F C F 0 0 0 32 1 3 Discharge Opensthelistofdischargepressureswitches 1 3 x Dischargex Listofparametersrelatedtothecontrolofthedischargepressureswitch x Wherexrepresentsdisc...

Страница 55: ...ures from being regulated by mistake from the normal andeconomysetpoint 1 3 x 10 Maximumpressuresetpoint Highest possible value for setpoint adjustment The purpose is to prevent unreasonably high pres...

Страница 56: ...n1inverter 1 3 x 27 to 1 3 x 32Fan01to06Digitaloutput Digitaloutputaddressoffan1to6 1 3 x 33 Minimumtimebetweenstarts Thefunctionappliestothemaincontroloutputsofthefansandistheminimumtimebetweentwoact...

Страница 57: ...ms Alarmsareassignedseparatelyforeachsuctionpressureswitch Inthislist selectthesuctiontowhichyouwanttoconfigurethealarms 1 4 2 x Suctionalarms IfconfiguredwiththeOFFparameter alarmsarenotenabled Thele...

Страница 58: ...1 4 3 x 9 Highsubcooling Enablesthealarmwhenthesubcoolingishigherthantheconfiguredvalue 1 4 3 x 10 Hysteresisoftemperaturealarms Itisthetemperaturevariationnecessarytogetoutofthealarmsituation 1 4 4...

Страница 59: ...outputremainsshutdowninanalarmevent WhenthistimeissettoOFF theoutputwillbeactivatedifthereisanalarmcondition 1 4 5 x 5 Contacttype Outputpolarity 0 NO Whentheoutputisactuated thecontactisclosed 1 NC W...

Страница 60: ...on will bemaintaineduntiltheproblemiscorrected connectionorreplacementofthesensor 1 5 x 7 Timeonforcycletimer Timethatthecompressororfanremainson 1 5 x 8 Timeoffforcycletimer Timethatthecompressororfa...

Страница 61: ...tion outputs 1 8 Group 1 suction 15 Rotation outputs 2 9 Group 2 16 Rotation outputs 3 11 Group 3 10 Group 2 suction 17 All outputs 12 Group 3 suction 4 Safety input 4 Available for 1 6 x 1 1 to 6 12...

Страница 62: ...collection Afterthistimehaselapsed compressorsareshutdown 1 7 1 x 4 Digitaloutput Addressdigitaloutput Feature Minimum Description 1 7 1 x 1 1 7 1 x 2 1 7 1 x 3 1 7 1 x 4 Pump Down setpoint Digital ou...

Страница 63: ...Digital output 10 0 18 0 200 1 off 392 2 200 1 off 392 2 200 1 off 392 2 200 1 off 392 2 5 0 9 0 0 0 1 0 2 0 0 0 32 0 0 32 0 C F C F C F Feature 1 7 2 x 1 1 7 2 x 2 1 7 2 x 3 1 7 2 x 5 1 7 2 x 4 Feat...

Страница 64: ...f TimelengththeoutputremainsoffinCycleTimerModeandTemperaturewithcycletimer 1 7 3 x 14 Starttime Logicoperatingstarttime 1 7 3 x 15 Endtime Logicoperatingendtime 1 7 4 1 Floatingcondensation Theletter...

Страница 65: ...point 4 Pressure setpoint 2 Pressure hysteresis 1 Pressure hysteresis 2 Pressure hysteresis 3 1 7 5 x 19 1 7 5 x 14 1 7 5 x 20 1 7 5 x 15 1 7 5 x 21 1 7 5 x 16 1 7 5 x 22 425 0 29 3 0 0 0 C F Psi Bar...

Страница 66: ...ontrolhysteresislinkedtoindividualthermostatoutput 1 7 6 x 4 Lowpressuralarm Enablesthealarmindicationwhenthetemperatureislowerthantheconfiguredvalue 1 7 6 x 5 Highpressurealarm Enablesthealarmindicat...

Страница 67: ...ervalduringwhichthethermostatremainsindefrost 1 7 6 x 16 to 1 7 6 x 21 Defrosttime Itallowsconfiguringaspecifictimetodefrost Inthiscase thedefrostintervalparameterwillnotbeconsidered 1 7 7 Rotationout...

Страница 68: ...entstheanalogoutputsA1andA2 Feature Minimum Maximum Unit Standard Description 1 7 8 1 0 0 Digital output address Feature Minimum Maximum Unit Standard Description 1 8 x 1 1 8 x 2 1 8 x 3 1 8 x 5 1 8 x...

Страница 69: ...gerantcurves Point1topoint20 It allows to adjust a customized saturated refrigerant curve If you want to use a refrigerant that is not included in the list you can enter the saturation pressure and te...

Страница 70: ...act water infiltration overload and or atmosphericdischarge To be covered and benefit from the guarantee the customer must send the product properly packed together with the corresponding purchase inv...

Отзывы: