Full Gauge PCT-400R Plus User manual

DIGITAL PRESSURE CONTROLLER
FOR COOLING CENTERS
PCT-400Ri plus
DISCHARGE PRESSURE
GAUGE
SUCTION PRESSURE
GAUGE
UL-Underwriters Laboratories
1.DESCRIPTION
The isapressurecontrollerto be usedin cooling centersthat need controlover
the suction and discharge stages. Working in pairs, it is possible to control up to four fans and four
compressors at the same time. Through remote communication between suction and discharge
controllers,itispossibletoobtainmoreprecisecontroloftheprocess.
Availableintheversionforhigh(discharge)andlow(suction)pressures,the can
operateinconjunctionwithanother,oronitsown.
With four pressure control outputs and remote communication, the allows the
dischargepressuregaugetoturnoffthesuctionpressuregaugeduetoanalarmsituation.Becauseitis
veryversatile,itmanagementtheactivationofthechargeslinearly,byrotationorbycapacities.Through
serialoutput,theRS-485allows communicationwith software,whichmakesits configuration
simpleandfast.
PCT-400Ri plus
PCT-400Ri plus
PCT-400Ri plus
SITRAD
Forusewithrefrigerationprocessescontrollingthesystem’scompressors(suction)orfans(discharge).
®
2.APPLICATION
3.TECHNICALSPECIFICATIONS
-Powersupply:
-Controlpressure:
-Resolution:
-Maximumcurrent:
-Dimensions:
-Controlleroperatingtemperature:
-Transduceroperatingtemperature:
-Operatinghumidity:
-Controloutputs:
12Vac/dc(withexternalenergysource127/220Vac±10%(50/60Hz))
0to100psi/0to6.9bar(usingtheSB69-100Vtransducer)
0to500psi/0to34.4bar(usingtheSB69-500Vtransducer)
1psi/0.1bar
5(3)A/250Vac1/8HP(eachoutput)
71x28x71mm 0to50ºC
-40to125°C
10to90%RH(withoutcondensation)
OUT1-Outputforthefirstpressurecontrolstage
OUT2-Outputforthesecondpressurecontrolstage
OUT3-Outputforthethirdpressurecontrolstage
OUT4-Outputforthefourthpressurecontrolstage
ALRM-Ledforindicatingalarms
4.CONFIGURATIONS
Attention
At first select the pressure measure unit (item 7) and the kind of pressostat (item 8) that you want to
work.Itisveryimportantselectittokeepyourconfiguration,ifyoudonotdothat theinstrumentreturns
thestandardconfiguration,nowitisreadytoselectthesetpoint.
4.1-Control presssureadjust(SETPOINT)
4.2-Toenterintothefunctionsmenu
-Press for2secondsuntilappears ,andreleaseitafterthat.Theadjustedoperationpressure
willappear.
-Use and tochangethevalueandthenpress torecordit.
Press and simultaneously for two seconds until it appears, then releasing it. When
appears,press (shorthit)andenterthecode(123)throughkeys and .Toconfirm,
pressthekey .Throughthekeys and accesstheotherfunctionsandproceedinthesame
manner to adjust them. To leave the menu and return to normal operations, press (long hit) until
appears.
SET
SET
SET
SET
SET
4.3-Parameters table
Description Min Max Unit
SUCTION
Fun Min Max
DISCHARGE
Access code (123)
Indication Offset
Control differential (hysteresis)
Minimum Setpoint allowed for the end user
Maximum Setpoint allowed for the end user
Low pressure alarm
High pressure alarm
Automatic rearm after alarm
Startup delay (activation)
Time for blocking the alarm
Delay for proving alarm situation
Number of stages
Operating Mode for the Stages
Capacity of the compressor/stage 1
Capacity of the compressor/stage 2
-99
-5/-0.3
1/0.1
0/0.0
0
0
0
0
/0.0
/0.0
0/0.0
0
0
1
0
0
0
999
5/0.3
100/6.9
100/6.9
100/6.9
100/6.9
100/6.9
4
999
999
999
4
2
100
100
-
psi/bar
psi/bar
psi/bar
psi/bar
psi/bar
psi/bar
-
sec.
sec.
sec.
-
-
%
%
-99
-20/-1.4
1/0.1
0/0.0
0/0.0
0/0.0
0/0.0
0
0
0
0
1
0
0
0
999
20/1.4
100/6.9
500/34.4
500/34.4
500/34.4
500/34.4
4
999
999
999
4
2
100
100
Unit
-
psi /bar
psi/bar
psi/bar
psi/bar
psi/bar
psi/bar
-
sec.
sec.
sec.
-
-
%
%
0
0/0.0
10/0.7
0/0.0
500/34.4
0/0.0
500/34.4
0
0
0
1
4
0
25
25
Standard Standard
0
0/0.0
4/0.4
0/0.0
100/6.9
0/0.0
100/6.9
0
0
0
1
4
0
25
25
Capacity of the compressor/stage 3
Capacity of the compressor/stage 4
Outputs' state when a sensor error is
detected
Minimum time between activation of 2
different stages
Minimum time between deactivation 2
different stages
Minimum time of stage activated
Minimum time of stage deactivated
Maximum operating time between
maintenances on the stage 1
Maximum operating time between
maintenances on the stage 2
Maximum operating time between
maintenances on the stage 3
Maximum operating time between
maintenances on the stage 4
Address of the equipment on the network
RS-485 (serial communication)
0
0
0
0
0
0
0
0
0
0
0
1
100
100
15
999
999
999
999
999
999
999
999
247
%
%
-
sec.
sec.
sec.
sec.
x10h
x10h
x10h
x10h
-
25
25
0
2
1
1
1
999
999
999
999
1
0
0
0
0
0
0
0
0
0
0
0
1
100
100
15
999
999
999
999
999
999
999
999
247
%
%
-
sec.
sec.
sec.
sec.
x10h
x10h
x10h
x10h
-
25
25
0
2
1
1
1
999
999
999
999
1
4.4-Parameters description
Accesscode(123)
IndicationOffset
Controldifferential(hysteresis)
MinimumSetpointallowedfortheenduser
Thiswillbenecessaryforchangingtheconfigurationparameters.Thiscodewillnotbenecessaryfor
onlyviewingtheadjustedparameters.
Allows compensation for any deviations on the pressure reading resulting from a change of the
sensor.
Isthe value of therelative pressure that definesthe pressure range withinwhich the control stages
should be activated. The points on which each stage will be activated depend on functions F12
(numberofstages)andF13(operatingmodeforthestages).Theminimumvalueofthehysteresisis
thenumberofstagesconfiguredinF12.
Lowerlimit,thepurpose ofwhichistoavoidanyaccidentalregulationofpressuresatlevelsthatare
exaggeratedlybelowthesetpoint.
MaximumSetpointallowedfortheenduser
Lowpressurealarm
Highpressurealarm
Automaticrearmafteralarm
Upperlimit,the purposeofwhichistoavoidanyaccidental regulationofpressures atlevelsthatare
exaggeratedlyabovethesetpoint.
This is the value of the reference pressure for activating the low pressure signal when below the
desiredpoint.
This is the value of the reference pressure for activating the high pressure signal when above the
desired point. In the event that the pressure gauge is configured as a discharge, a remote high
pressurealarmshouldalsobesenttothesuctionpressuregauge,sothatitdeactivatesitsoutputs.
Thisfunctiondefineshowthepressuregaugewillbehaveaftertheremotealarmsituationstops.
Onlyacceptsmanualrearms,evenafterremotealarmsituationsstop
Thecontrolleronlyperformsoneautomaticrearm
Thecontrolleronlyperformstwoautomaticrearms
Thecontrolleronlyperformsthreeautomaticrearms
Thecontrolleronlyperformsautomaticrearms
Startupdelay(activation)
Timeforblockingthealarm
Delayforprovingalarmsituation
Numberofstages
OperatingModefortheStages
Linear Mode:
Time counted from the initialization wherein the instrument only shows the pressure without
activatingeitherthealarmorthestages.
Thisis the timethatthe alarm willremain deactivated, evenunderalarm conditions.This block time
startstobecountedafterthestartupdelaycounthasended(F09).
Alarmblockingtimeto distinguish between one of the alarm situations oratransitorycondition of the
system.
Functionthatindicateswhichstageswillbeactivated.
Functionthatselectsthemethodforactivatingthestages.
In this mode of operation, the controller activates compressors as the
pressureof theline movesaway fromthe setpoint.Theactivationpointforeachcompressoris
calculated in accordance with the value of the hysteresis (F03) and the number of stages
configured(F12).
Ver.03
PCT400V03-01T11273

+2 psi
+4 psi
+6 psi
+8 psi
Setpoint
C1
C1+C2
C1+C2+C3
C1+C2+C3+C4
Hysteresis
Time
Compressor activation step
Step = Hysteresis / Number of stages
Activation pressure of the "N" output
Activation = Setpoint + ((N-1) x Step))
For example, if the setpoint is 10psi, the hysteresis is 8psi and the number of stages is 4, the first
compressorwillbeturnedonwhenthepressureis12psi,thesecondat14psi,thethirdat16psiandthe
fourthat18psi.Pleasenotethatat18psiallofthecompressorswillbeturnedon.
Setpoint
C1
C1+C2
C1+C2+C3
C1+C2+C3+C4
C2+C3+C4
OFF
Hysteresis
Time
C3+C4
C4
+2 psi
+4 psi
+6 psi
+8 psi
Rotation Mode: Theonly differenceexistingbetween the linearmode and therotationmode is
thatwhenthepressurereaches adesiredvalue (setpoint)andallofthe compressorsareoff,arotation
ofthecompressorswilltakeplace,sothatthetimethattheyareoperationalisbalancedbetweenthem.
CapacityMode:Inthismodeofoperation,theoperatingpointforeachcompressoriscalculated
accordingtothecapacitythereof(F14~F17).
The number of stages configured in function 12 continues being considered, and for that reason, it
shouldhavethesumofthecapacitiesoftheactivestages beexactly100%,the deactivatedstageswill
beautomaticallyconfiguredasa0%capacity,andtheuserwillnothavepermissiontoalteritsvalue.
Theactivationofthestagesdependsonthevaluesofthecapacitiesofeachcompressor.Forexample,if
thecapacitiesare 10%, 20%,30%,40% for thecompressorsC1 through C4 respectively, thesetpoint
10psiandthehysteresis10psi,theoperatinglevelsforeachcompressorwillbeasfollows:
Pressure =11(10%)C1
Pressure =12(20%)C2
Pressure =13(30%)C3
Pressure =14(40%)C4
Pressure =15(50%)C1+C4
Pressure =16(60%)C2+C4
Pressure =17(70%)C3+C4
Pressure =18(80%)C1+C3+C4
Pressure =19(90%)C2+C3+C4
Pressure =20(100%)C1+C2+C3+C4
Please note that the capacities of the compressors can be configured in any order, for example: 20%,
40%,10%and30%forcompressorsC1throughC4.
C4
C3
C2
C1
Time
Stages
10%
Time
C1
C1+C4 C2+C4
C3+C4
C1+C3+C4
C2+C3+C4
C1+C2+C3+C4
20%
30%
40%
50%
60%
70%
80%
90%
100%
C2+C3+C4
C1+C3+C4
C3+C4
C2+C4
Demand
Setpoint
C2 C3C4
Capacityofthecompressor/stage1
Capacityofthecompressor/stage2
Capacityofthecompressor/stage3
Capacityofthecompressor/stage4
Outputs'statewhenasensorerrorisdetected
Thisfunctiondefinesthecapacityinapercentageofstage1inrelationtothetotaloftheactivestages.
Thisfunctiondefinesthecapacityinapercentageofstage2inrelationtothetotaloftheactivestages.
Thisfunctiondefinesthecapacityinapercentageofstage3inrelationtothetotaloftheactivestages.
Thisfunctiondefinesthecapacityinapercentageofstage4inrelationtothetotaloftheactivestages.
Usethisfunctionto configure the default state that eachofthecontroler's outputs will assume when a
pressure measurement error occurs. The table below indicates the function value according to each
outputstate.
Off
On
Off
On
Off
On
Off
On
Off
On
Off
On
Off
On
Off
On
Off.
Off
On
On
Off.
Off
On
On
Off.
Off
On
On
Off.
Off
On
On
Off.
Off
Off.
Off
On
On
On
On
Off.
Off
Off.
Off
On
On
On
On
Off.
Off
Off.
Off
Off.
Off
Off.
Off
On
On
On
On
On
On
On
On
Out 1
Function Value
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Out 2 Out 3 Out 4
Minimumtimebetweenactivationof 2differentstages
Minimumtimebetweendeactivationof 2differentstages
Minimumtimeofstageactivated
Minimumtimeofstagedeactivated
Maximumoperatingtimebetweenmaintenancesonthestage1
Maximumoperatingtimebetweenmaintenancesonthestage2
Maximumoperatingtimebetweenmaintenancesonthestage3
This time guarantees that no simultaneous activations will take place, avoiding an overload on the
electricalsystem.
Minimum time for the deactivation of different stages. This time prevents two or more charges from
beingdeactivatedsimultaneously.
Guaranteesaminimumtimethatthechargewillbeactivated.
Timeprovidedtopreventastagefrombeingactivatedsuccessively.
Timeindozensofoursthatstage1shouldremainfunctionalwithoutmaintenance.
Timeindozensofoursthatstage2shouldremainfunctionalwithoutmaintenance.
Timeindozensofoursthatstage3shouldremainfunctionalwithoutmaintenance.
Maximumoperatingtimebetweenmaintenancesonthestage4
AddressoftheequipmentonthenetworkRS-485(serialcommunication)
Timeindozensofoursthatstage4shouldremainfunctionalwithoutmaintenance.
Addressof theequipmenton thenetwork forcommunicationwith thesoftware SITRAD .Remarks:on
thesamenetwork,thereshouldbenoequipmentthatsharesthesameaddress.
®
5.FUNCTIONSWITHFACILITATEDACCESS
5.1-Visualizeminimumandmaximumpressures
Pressingthekey ,youcanvisualizetheminimumandmaximumpressuresofthepressuregauge.After
pressing the key, the minimum and maximum pressures will be displayed, respectively, followed by the
message indicating the end of the operation. If the key remains pressed in, the values will be
reinitializedandthemessage willbeshowninthedisplay.
5.2-Displaythehours worked
Pressingthekey you canvisualizethe hoursworkedfor eachcontrolstage.Afterpressing thekey, the
message will appear in the display with the number of the stage. Then the functioning time will be
displayedinmultiplesoftensofhours(x10h)forthestageinquestion.Thisoperationwillberepeatedforthe
fourstagesofthecontroller,untilthemessage isdisplayed,indicatingtheendoftheoperation.

6.SIGNALLING
7.PRESSUREUNITSELECTION
Lowpressurealarm
Highpressurealarm
Remotealarm(onlythesuctionpressuregauge)
Communicationcablebetweenthepressuregaugesinterruptedordisconnected
Maintenancealarmforthecompressor1
Maintenancealarmforthecompressor2
Maintenancealarmforthecompressor3
Maintenancealarmforthecompressor4
Totalsumofthecapacitiesoftheactivestagesthataredifferentfrom100%
Pressuresensordisconnectedoroutofrange
Configurationparametersnotprogrammedoroutofrange
Todefinethepressureunitthatthesystemwillusetooperate,enterintothefunctionsmenu insert
the access code "231" there and confirm it by hitting key . The indication will appear, then
press or tochoosebetween:
Pressureunitpsi
Pressureunitbar
SET
Confirm the selection with the key and then the message confirming the operation will be
displayed.Uponalteringthetypeofpressuregauge,thevaluesforthefunctionsreturntothe"standard"
values.
Todefinethetypeofpressuregaugethatthecontrollerwilloperatebetweenwiththeaccesscode"312"
on the function and confirm with the key . The indication will appear, press or
tochoosebetween:
Dischargepressureswitch
Suctionpressuregaugeinconjunctionwiththedischargepressuregauge
Independentsuctionpressuregauge
Confirmthe selection withthekey and then themessage confirming the operationwillbe
displayed.Uponalteringthetypeofpressuregauge,thevaluesforthefunctionsreturntothe"standard"
values.
8.SELECTIONOFTHETYPEOFPRESSUREGAUGE
SET
SET
SET
Integrating Controllers, RS-485 Serial Interface and Computer
AA
BB
AB
Alarm
OUT Alarm
IN
Serial
communication
RS-485
Serial
communication
RS-485
ALMR SERIAL
ALMR SERIAL
Brown - A
Red - B
RS-485
®
AA
BB
AB
AA
BB
AB
Serial interface
RS-485
Full Gauge
RS-485
SUCTION
PRESSURE GAUGE
DISCHARGE
PRESSURE GAUGE
RS-485SerialInterface
®
Device used to establish the
connection Full Gauge Controls’
instrumentswiththeSitrad .
Terminal
grounded
External
mesh
Distribution Box
Used to connect more than one instrument to the Interface. The
wire'sconnectionsmustbemadein agreementwiththefollowing
rules: terminal of the instrument connects to the terminal of
thedistributionbox,thatmustbeconnectedwiththeterminal of
theInterface.Repeattheactionforterminals and ,being
thecableshield.
AA
A
B
the terminal of distribution box must be connected to the
respectiveterminals ofeachinstrument.
5.3-Manualrearm of theremote alarm
(only the suction pressuregauge)
Iftheremotealarm hasbeenactivated,the message willalternatein thedisplay.Pursuant towhatis
configuredinthe rearmtypefunction, (F08)theuser willhavetomanually rearmthecontroller.Forthis,the
pressure of the discharge pressure gauge should already be returned to normal, and then the user should
pressthekeys and simultaneouslyuntiltherearmmessage isshownonthedisplay.After
this operation, the message will be displayed and the suction pressure gauge returns to normal
operations.
Ifthedischargepressuregaugeisstillatahighpressurestatus,thecontrollerwillnotallowtheusertorearm
the suction pressure gauge. In this case, upon pressing the keys and simultaneously, only the
message willbedisplayed,indicatingthatnorearmtookplace.
Inthe event that anyof the maintenance alarmshas activated the message withthe number of the
stage,itwillbechangedon thedisplay.Torestartthealarm,pressthe keys and forfourseconds.
After this, the alarm message for the stage will be once again displayed followed by the message ,
indicating that the alarm was restarted. This operation will be automatically executed for all of the
maintenancealarmactiveatthetime.Uponrestartingthemaintenancealarm,thehourcounterusedonthe
compressorinquestionwillbesetatzero.
5.4-Restart of themaintenancealarm
SET
SET
SET
IMPORTANT
Attention on transductor installation, do not turn on the terminals on reverse position, it can
damagetotallythetransductor.
1:
2:
3:
AccordingtothechaptersofnormIEC60364:
Install onthepowersupply
Sensorcables andsignal cablesof thecomputer maybejoined,butnotinthesameelectric conduit
throughwhichtheelectricinputandtheactivationoftheloadsrun
Install transient suppresors (RC filters) parallel to the loads as to increase the product life of the
relays.
protectoragainstovervoltage
For more information, please contact our Technical Support by e-mail: or by
phone [phone]
[email protected]
Schematic for the connection of supresors
to contactors
Suppresor
A1
A2
A1 and A2 are the
contactor coil terminals.
Schematic for the connection of supresors to
direct activation loads
Load
Suppresor
For direct activation the maximum
specified current should be taken
into consideration.
Brown
Green
White
9. WIRING DIAGRAM
1
2
4
5
6789
10
11
12
3
1
2
4
5
6789
10
11
12
3
12V
Power supply
COMMON 1
OUT 2
OUT 1
Load 1
supply
Alarm
Load 1 Load 2 Load 3 Load 4
RS-485 serial
communication
COMMON 2
COMMON 3
COMMON 4
Load 2
supply
Load 3
supply
Load 4
supply
OUT 3 OUT 4
+
NO 1
NO 2
NO 3
NO 4
BA
To the terminal of
the distribution box
SCHEMATIC FOR TRANSDUCER
Brown:
Green:
White:
5Vdc
Ground
Output
Transducer
Over the specifield current
use a contactor.
1/4 SAE
PROTECTIVE :VINYL
This adhesive vinyl (included inside the packing) protects the instruments against
waterdrippings,asincommercialrefrigerators,forexample.Dotheapplicationafter
finishingtheelectricalconnections.
Remove the protective paper
andapplythevinylontheentire
superior part of the device,
foldingtheflapsasindicatedby
thearrows.
72 mm
Dimension of the clipping
for setting of the instrument
in panel
29 mm