preface to ekc 531a and ekc 531b code number: 084b8003...

Preface to EKC 531A andEKC 531B

Code number:084B8003084B8004

This controller is only made oncustomers demand and cannot beordered generally.

R E F R I G E R A T I O N A N D A I R C O N D I T I O N I N G

Capacity controller- EKC 531A and 531B

084B8003 / 084B8004

Manual

Refrigeration and Air Conditioning Controls

ADAP-KOOL®

Refrigeration control systems

2 Manual RS.8C.Y3.02 © Danfoss 05-2003 EKC 531A / B

Introduction

ApplicationThe controller is used for capacity regulation of compressorsor condensers in small refrigerating systems.There are two controllers in the series one of which hasrelay outputs to both compressor steps and condensersteps while the other controller uses all relay outputs forcompressor steps.

Advantages• Patented neutral zone regulation• Many possible combinations for compressor constellations• Sequential or cyclic operation• Possibility of suction pressure optimisation via the data

communication

RegulationRegulation is based on signals from one pressuretransmitter for the compressor regulation and one pressuretransmitter for the condenser regulation plus onetemperature sensor for the air temperature before thecondenser.

Functions• Relays for capacity regulation• Voltage output for capacity regulation• Status inputs. An interrupted signal indicates that the

safety circuit has been activated and the respective circuitstopped

• Contact inputs for indication of alarms• Contact inputs for displacement of references or for

indication of alarms• Alarm relay• External start/stop of regulation• Possibility of data communication

OperationAll operation takes place either via data communication orvia connection of a display type EKA 162. The display canbe disconnected after the installation.

Two controllers

EKC 531AThis controller is capable of regulating up to fourcompressors and four fans. The condenser capacity can beincreased by another four fans through connection of amodule on the analog output. Or the entire condensercapacity can be regulated via the analog output and afrequency converter.

EKC 531BThis controller can regulate up to ten compressors. Thecondenser capacity is regulated exclusively via the analogoutput – either with relay modules or with a frequencyconverter.

EKC 531A / B Manual RS.8C.Y3.02 © Danfoss 05-2003 3

Sequential (first in - last out)The relays are here cut in in sequence – first relay number1, then 2, etc.Cutout takes place in the opposite sequence, i.e. the lastcut-in relay will be cut out first.

Cyclic (first in - first out)The relays are coupled here so that the operating time ofthe individual relays will become equalised.At each cutin the regulation scans the individual relays’timer, cutting in the relay with least time on it.At each cutout a similar thing happens. Here the relay is cutout that has most hours on the timer.

If capacity regulation is carried out on two compressors withone unloader each, the following function can be used:Relays 1 and 3 are connected to the compressor motor.Relays 2 and 4 are connected to the unloaders.Relays 1 and 3 will operate in such a way that the operatingtime for the two relays will become equalised.

Rx = random relayh = number of hours

C = compressor, L = Unloader

FunctionCapacity regulationThe cut-in capacity is controlled by signals from the con-nected pressure transmitter and the set reference.Outside the reference a neutral zone is set where thecapacity will neither be cut in nor out.Outside the neutral zone (in the hatched areas named +zoneand -zone) the capacity will be cut in or out if the regulationregisters a change of pressure “away” from the neutral zone.Cutin and cutout will take place with the set time delays.If the pressure however “approaches” the neutral zone, thecontroller will make no changes of the cut-in capacity.If regulation takes place outside the hatched area (named++zone and --zone), changes of the cut-in capacity will occursomewhat faster than if it were in the hatched area.Cutin of steps can be defined for either sequential, cyclic,binary or "mix & match" operation.


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Configuration settings (compressor and fan definitions, coupling mode and refrigerant) can only take place when regulation isstopped.


Output signal from EKC 531AIn EKC 331 the voltage range must be set to 0-5 V (“o10” = 6).In EKC 331 the number of steps must be set to 4 (“o19” = 4) (alsowhen fewer fans are connected).

Output signal from EKC 531BIn the first EKC 331, set 0-5 V (“o10” = 6).In the second EKC 331, set 5-10 V (“o10” = 7).In both EKC’s the number of steps must be set to 4 (“o19” = 4)(also when fewer fans are connected to the second EKC).

If the entire condenser capacity is to be controlled by afrequency converter, EKC 531 must send an analogsignal about the required capacity (“c29” = 9).The signal varies from 0 to 10 V. Signal and capacityhave the following context.

Compressor connections Couplingmode

Relay no. Set"C08"

to

Set"C16"

to

User-defined combination. See Mix and Match settings.

All capacity steps are presumedto be identical. The onlyexception is setting with couplingmode 3. See below.

Coupling mode 1 = sequentialoperation.

Coupling mode 2 = cyclicoperation.

Coupling mode 3 = cyclic andbinary operation where thecompressor capacities are, asfollows:1: 11%2: 21%3: 34%4: 34%There is cyclic coupling at 3 and4, and binary on 1, 2 and 3/4.(for c16=4 only)

When there is cyclic operationand connections with unloadersthere will in some capacity cutinsand cutouts be overlappingswhere the unloaders from eitherone compressor or another maybe active.In such cases the unloaders onthe compressor with the lowestnumber of hours will be cut in,and the others cut out.The changeover will take place at6-second intervals.

Condenser couplings

1. 2.


DisplayThe values will be shown with three digits, and with a settingyou can determine whether the pressures are to be shown inbar or in psig.

OperationnoitcnuF -araP

retem.niM .xaM

yalpsidlamroN

htiwyalpsid(261AKEni0PswohS)snottub

- rab

161AKEnicPswohS - rab

ecnerefer0P

enozlartueN 10r rab1,0 rab5

rosnes0PmorflangisfonoitcerroC 40r rab1- rab1

)F°dnagisP=1,C°dnarab=0(tinutceleS 50r 0 1

noitalugerfopotS/tratS 21r FFO NO

0ProftesffoecnerefeR 31r rab1- rab1

0ProftnioptesnoitalugerteS 32r rab1- rab04

ecnerefer0PlatotswohS 42r rab

*eulav.xamecnerefer0P:noitatimiL 52r rab1- rab04

*eulav.nimecnerefer0P:noitatimiL 62r rab1- rab04

)"31r"evitca=NO(0PfotnemecalpsiD 72r FFO NO

ecnerefercP

cProftnioptesnoitalugerteS 82r rab0 rab06

ecnerefercPlatotswohS 92r rab

eulav.xamnecnerefercP:noitatimiL 03r rab0 rab06

eulav.nimnecnerefercP:noitatimiL 13r rab0 rab06

rosnescPmorflangisfonoitcerroC 23r rab2- rab2

.noitairavecnerefercPnoitaluger-IPera2dna1

:1 desusi”82r“.ecnereferdexiF:2 roodtuO.ecnereferelbairaV

ehtnidedulcni)3cS(erutarepmetecnerefer

:3 noitaluger-Phtiwtub,1sA:4 noitaluger-Phtiwtub,2sA

33r 1 4

cProftesffoecnerefeR 43r rab5- rab5

yticapaC

syalerrofemitNO.niM 10c .nim0 .nim03

emasfosnitucneewtebdoirepemit.niMyaler

70c .nim0 .nim06

edomnoitalugerfonoitinifeD1 )OLIF/edompets(laitneuqeS:

:2 )OFIF/edompets(cilcyC:3 cilcycdnayraniB

80c 1 3

sisredaolnuhtiwedomnoitalugerafI:otdenifedebtsumyalereht,detceles

:0 deriuqersiyticapaceromnehwnituC:1 deriuqersiyticapaceromnehwtuotuC

90c 0 1

enoZ+rofretemarapnoitalugeR 01c rab1,0 rab2

.nimenoZ+rofretemarapnoitalugeR 11c .nim1,0 .nim06

sdnocesenoZ++rofretemarapnoitalugeR 21c .nim1,0 .nim0,3

enoZ-rofretemarapnoitalugeR 31c rab1,0 rab2

.nimenoZ-rofretemarapnoitalugeR 41c .nim1,0 .nim06

sdnocesenoZ--rofretemarapnoitalugeR 51c .nim1,0 .nim01

.snoitcennocrosserpmocfonoitinifeD.9egapnosnoitpoeeS

61c 0 8

ylnosi”82c“ot”71c“gniwollofehT.0otdetcelesneebsah”61c“fitnaveler

ehtroftesebotevahnehtlliwedocAtnereffidehttaNOeboteratahtsyaler

:spets)noitarepoM&M(1petS 71c 0 51

)noitarepoM&M(2petS 81c 0 51





Menu survey EKC 531A

The buttonsWhen you want to change a setting, the two buttons will giveyou a higher or lower value depending on the button you arepushing. But before you change the value, you must haveaccess to the menu. You obtain this by pushing the upperbutton for a couple of seconds - you will then enter thecolumn with parameter codes. Find the parameter code youwant to change and push the two buttons simultaneously.When you have changed the value, save the new value byonce more pushing the two buttons simultaneously.

Gives access to the menu (or cutout an alarm)

Gives access to changes

Saves a change

Operation1. Push the upper button until a parameter is shown2. Push one of the buttons and find the parameter you want

to change3. Push both buttons simultaneously until the parameter

value is shown4. Push one of the buttons and select the new value5. Push both buttons again to conclude the setting

SW: 1.2x

To be continued

EKA 162For operation and displayof evaporating pressure.The light-emitting diodeson the left-hand side flashwhen there is an alarm.

EKA 161For display of condensingpressure.

Factory settingIf you need to return to the factory-set values, it can be done in this way:- Cut out the supply voltage to the controller- Keep both buttons depressed at the same time as you reconnect the supply

voltage* applies also at P0-optimisation


segassemgniwollofehtevignacrellortnocehT

1E rorrEgassem e

rellortnocnitluaF

2Elortnocehtro,egnarehtedistuosinoitalugeR

.evitcefedsilangis

2A mralAegassem

0PwoL

11A detcelestontnaregirfeR

71A cPhgiH

91A neposi92lanimreT.mrala1rosserpmoC




72A ).pmetgnisuoh(mralaerutarepmetmooR

82A detpurretni64lanimreT.mrala1ID





43A neposi33lanimreT.mrala1resnednoC


63A neposi53lnaimreT.mrala3resnednoC


54A deppotsnoitalugeR

2S sutatSegassem

"10c"roftiaW

5S "70c"roftiaW

8S "21c"ro"11c"roftiaW


01SrolanretniehtybdeppotsnoitaregirfeR

noitcnufpots/tratslanretxe

52S tuptuofolortnoclaunaM







:resnednocfonoitinifeD:4-1 morfgnitratssnafforebmunehT

31-21noitcennoc:8-5 tuptuogolanaaivsnafruof.xamrehtruF

:9 fotratsdnatuptuogolanaaivylnOretrevnocycneuqerf

92c FFO/0 9

resnednocrofpXrotcafnoitacifilpmAnoitaluger

40n rab2,0 rab01

noitalugerresnednocrofnTemitnoitargetnI:I 50n s03 s006

mralA

mrala"gnisuoH"arofemityaleD 30A .nim0 nim09

0ProftimilmralawoL 11A rab1- rab04

mrala1IDarofemityaleD 72A s0s006

ffo/


ffo/


ffo/

cProftimilmralareppU 03A rab0 rab06

"gnisuoH"rosnesroftimilmralareppU 23AC°0ffo/

001C°

suoenallecsiM

sserddasrellortnoC *30o 1 06

)egassemnip-ecivres(hctiwsffo/nO *40o - -

edocsseccA 50o )1-(ffo 001

"gnisuoH"dna4cS,3cSrofepytrosnesdesU=0 ,0001TP =1 0001CTP

60o 0 1

ycneuqerfegatlovylppusteS 21o zH05 zH06

:stuptuofolortnoclaunaM:0 edirrevooN

:01-1 .cte,2yaler2,1yalernituclliw1:81-11 golanaehtnolangisegatlovseviG

fospetsninoosdna,V52.1sevig11(.tuptuo.V52.1

81o 0 81

p0P -egnargnikrows’rettimsnarterussereulav.nim

02o rab1- rab0

p0P -egnargnikrows’rettimsnarterussereulav.xam

12o rab1 rab04

tupni-4IDfoesU=0 .desuton =1 .tnemecalpsid0P =2 mrala

"13A"=mralA.noitcnuf22o 0 2

emiteulav(1yalerfosruohgnitarepO )0001 32o h




tnaregirferfognitteS.205R=4.a431R=3.22R=2.21R=1.32R=8.1b31R=7.31R=6.717R=5

.b241R=21.411R=11.305R=01.005R=9.722R=51.23R=41.denifedresU=31

.A204R=81.705R=71.A104R=61.A704R=12.C704R=02.A404R=91

.092R=52.071R=42.A014R=32.B704R=22.0721R=92.447R=82.a006R=72.006R=62

A714R=03

03o 0 03

tupni-5IDfoesU=0 .desuton =1 .tnemcalpsidcP =2 mrala


pcP -egnargnikrows’rettimsnarterussereulav.nim

74o rab1- rab0

pcP -egnargnikrows’rettimsnarterussereulav.xam

84o rab1 rab06

"gnisuoH"rosnestaerutarepmetdaeR 94o C°

ecivreS

"3cS"rosnestaerutarepmetdaeR 44u C°


leudomnoitacinummocatadafielbissopebylnolliwgnittessihT)*.rellortnocehtnidellatsnineebsah

Continues...


Menu survey EKC 531B SW: 1.2x

noitcnuF -araPretem

.niM .xaM

yalpsidlamroN

htiwyalpsid(261AKEni0PswohS)snottub

- rab

161AKEnicPswohS - rab

ecnerefer0P

enozlartueN 10r rab1,0 rab5

rosnes0PmorflangisfonoitcerroC 40r rab1- rab1

)F°dnagisP=1,C°dnarab=0(tinutceleS 50r 0 1

noitalugerfopotS/tratS 21r FFO NO

0ProftesffoecnerefeR 31r rab1- rab1

0ProftnioptesnoitalugerteS 32r rab1- rab04

ecnerefer0PlatotswohS 42r rab

*eulav.xamecnerefer0P:noitatimiL 52r rab1- rab04

*eulav.nimecnerefer0P:noitatimiL 62r rab1- rab04

)"31r"evitca=NO(0PfotnemecalpsiD 72r FFO NO

ecnerefercP

cProftnioptesnoitalugerteS 82r rab0 rab06

ecnerefercPlatotswohS 92r rab

eulav.xamnecnerefercP:noitatimiL 03r rab0 rab06

eulav.nimnecnerefercP:noitatimiL 13r rab0 rab06

rosnescPmorflangisfonoitcerroC 23r rab2- rab2

noitairavecnerefercPnoitaluger-IPera2dna1

:1 desusi"82r".ecnereferdexiF:2 roodtuO.ecnereferelbairaV

ehtnidedulcni)3cS(erutarepmetecnerefer

:3 noitaluger-Phtiwtub,1sA:4 noitaluger-Phtiwtub,2sA

33r 1 4

cProftesffoecnerefeR 43r rab5- rab5

yticapaC

syalerrofemitNO.niM 10c .nim0 .nim03

emasfosnitucneewtebdoirepemit.niMyaler

70c .nim0 .nim06

edomnoitalugerfonoitinifeD1 )OLIF/edompets(laitneuqeS:

:2 )OFIF/edompets(cilcyC:3 cilcycdnayraniB

80c 1 3

sisredaolnuhtiwedomnoitalugerafI:otdenifedebtsumyalereht,detceles

:0 deriuqersiyticapaceromnehwnituC:1 deriuqersiyticapaceromnehwtuotuC

90c 0 1

enoZ+rofretemarapnoitalugeR 01c rab1,0 rab2

.nimenoZ+rofretemarapnoitalugeR 11c .nim1,0 .nim06

sdnocesenoZ++rofretemarapnoitalugeR 21c .nim1,0 .nim0,3

enoZ-rofretemarapnoitalugeR 31c rab1,0 rab2

.nimenoZ-rofretemarapnoitalugeR 41c .nim1,0 .nim06

sdnocesenoZ--rofretemarapnoitalugeR 51c .nim1,0 .nim01

.snoitcennocrosserpmocfonoitinifeD.9egapnosnoitpoehteeS

61c 0 02

ylnosi”82c“ot”71c“gniwollofehT.0otdetcelesneebsah”61c“fitnaveler

ehtroftesebotevahnehtlliwedocAtnereffidehttaNOeboteratahtsyaler

:spets)noitarepoM&M(1petS 71c 0 552












:rebmundnasnoitcennocnaffonoitinifeD:4-1 tsrifehtmorfgnitratssnafforebmuN

.133CKE:8-5 133CKEowteraerehtfirebmunlatoT

.stinu:9 ycneuqerfdnatuptuogolanaaivylnO

retrevnoc

92c ffo/0 9

)pX/001=P(rofpXrotcafnoitacifilpmAnoitalugerresnednoc

40n rab2,0 rab01

noitalugerresnednocrofnTemitnoitargetnI:I 50n s03 s006

mralA

mrala"gnisuoH"arofemityaleD 30A .nim0 nim09

0ProftimilmralawoL 11A rab1- rab04


ffo/


ffo/


ffo/

cProftimilmralareppU 03A rab0 rab06

"gnisuoH"rosnesroftimilmralareppU 23AC°0ffo/

001C°

suoenallecsiM

sserddasrellortnoC *30o 1 06

)egassemnip-ecivres(hctiwsffo/nO *40o - -

edocsseccA 50o )1-(ffo 001

"gnisuoH"dna4cS,3cSrofepytrosnesdesU=0 ,0001TP =1 0001CTP

60o 0 1

ycneuqerfegatlovylppusteS 21o zH05 zH06

:stuptuofolortnoclaunaM:0 edirrevooN

:01-1 .cte,2yaler2,1yalernituclliw1:81-11 golanaehtnolangisegatlovseviG

fospetsninoosdna,V52.1sevig11(.tuptuo.)V52.1

81o 0 81

p0P -egnargnikrows’rettimsnarterussereulav.nim

02o rab1- rab0

p0P -egnargnikrows’rettimsnarterussereulav.xam

12o rab1 rab04

tupni-4IDfoesU=0 .desuton =1 .tnemecalpsid0P =2 mrala






tnaregirferfognitteS.205R=4.a431R=3.22R=2.21R=1.32R=8.1b31R=7.31R=6.717R=5

.b241R=21.411R=11.305R=01.005R=9.722R=51.23R=41.denifedresU=31

.A204R=81.705R=71.A104R=61.A704R=12.C704R=02.A404R=91

.092R=52.071R=42.A014R=32.B704R=22.0721R=92.447R=82.a006R=72.006R=62

A714R=03

03o 0 03

To be continuedTo be continued* applies also at P0-optimisation


segassemgniwollofehtevignacrellortnocehT

1E rorrEgassem e

rellortnocnitluaF

2Elortnocehtro,egnarehtedistuosinoitalugeR

evitcefedsilangis

2A mralAegassem

0PwoL

11A detcelestontnaregirfeR

71A cPhgiH









72A ).pmetgnisuoh(mralaerutarepmetmooR






54A deppotsnoitalugeR

2S sutatSegassem

"10c"roftiaW

5S "70c"roftiaW



01SrolanretniehtybdeppotsnoitaregirfeR

noitcnufpots/tratslanretxe

52S tuptuofolortnoclaunaM

tupni-5IDfoesU=0 .desuton =1 .tnemcalpsidcP =2 mrala

""23A""=mralA.noitcnuf73o 0 2

pcP -egnargnikrows’rettimsnarterussereulav.nim

74o rab1- rab0

pcP -egnargnikrows’rettimsnarterussereulav.xam

84o rab1 rab06

"gnisuoH"rosnestaerutarepmetdaeR 94o C°






emiteulav(01yalerfosruohgnitarepO)0001

55o h

ecivreS



leudomnoitacinummocatadafielbissopebylnolliwgnittessihT)*.rellortnocehtnidellatsnineebsah

Factory settingIf you need to return to the factory-set values, it can be done in this way:- Cut out the supply voltage to the controller- Keep both buttons depressed at the same time as you reconnect the supply

voltage


Necessary connectionsTerminals:1-2 Supply voltage 24 V a.c.4- 11 Relay connections compressor no. 1, 2, 3 and 412-19 Relay connections fan no. 1, 2, 3 and 422-24 Alarm relay

There is connection between 22 and 24 in alarmsituations and when the controller is dead

27-28 24 V signal to start / stop of regulation27-29 24 V signal from the safety circuit compressor 127-30 24 V signal from the safety circuit compressor 227-31 24 V signal from the safety circuit compressor 327-32 24 V signal from the safety circuit compressor 427-33 24 V signal from the safety circuit fan 127-34 24 V signal from the safety circuit fan 227-35 24 V signal from the safety circuit fan 327-36 24 V signal from the safety circuit fan 457-59 Suction pressure. Voltage signal from AKS 32R60-62 Condenser pressure. Voltage signal from AKS 32R54-55 Out temperature (Sc3). Sensor signal from AKS 11,

AKS 12 or EKS 111

Connections EKC 531A

Application dependent connections20-21 Safety function. The contact cuts off if the data

communication is interrupted.37-38 Voltage signal to external condenser control39-41 Possibility of connecting an external display type EKA

161 for display of Pc42-44 Possibility of connecting an external display type EKA

161 for display of P0, or EKA 162 for operation anddisplay of P0

45-46 Contact function for alarm signal45-47 Contact function for alarm signal48-49 Contact function for alarm signal48-50 Contact function for displacement of the suction

pressure reference or for alarm signal.51-52 Contact function for displacement of the condenser

pressure reference or for alarm signal.51-53 Room temperature. Sensor signal fra AKS 11, AKS 12

or EKS 11154-56 Air temperature at condenser outlet. Sensor signal

from AKS 11, AKS 12 or EKS 111

Data communication25-26 Mount only, if a data communication module has

been mounted.For ethernet communication the plug connectionRJ45 must be used. (LON FTT10 can also beconnected in this way.It is important that the installation of the datacommunication cable be done correctly. Cf. separateliterature No. RC.8A.C...

All inputs are lowvoltage.All relay outputs maybe high voltage.

If an output is used for an unloader,the unloader's safety signal must bedownloaded from the compressor'ssatety circuit.

Unloader 1

Unloader 2


Connections EKC 531B

Necessary connectionsTerminals:1-2 Supply voltage 24 V a.c.4- 19 Relay connections compressor no. 1 to 827-28 24 V signal to start / stop of regulation27-29 24 V signal from the safety circuit compressor 127-30 24 V signal from the safety circuit compressor 227-31 24 V signal from the safety circuit compressor 327-32 24 V signal from the safety circuit compressor 427-33 24 V signal from the safety circuit compressor 527-34 24 V signal from the safety circuit compressor 627-35 24 V signal from the safety circuit compressor 727-36 24 V signal from the safety circuit compressor 857-59 Suction pressure. Voltage signal from AKS 32R60-62 Condenser pressure. Voltage signal from AKS 32R37-38 Voltage signal to external condenser control54-55 Out temperature (Sc3). Sensor signal from AKS 11,

AKS 12 or EKS 111

Application dependent connections20-21 Compressor 9, if applicable

Or any safety function. The contact cuts off if the datacommunication is interrupted

22-23 Compressor 10, if applicableOr alarm relay on 22-24, if there is oneThere is connection between 22 and 24 in alarmsituations and when the controller is de-energised

45-46 Contact function from the safety circuit compressor 9or contact function for alarm signal

45-47 Contact function from the safety circuit compressor10 or contact function for alarm signal, if applicable

39-41 Possibility of connecting an external display type EKA161 for display of Pc

42-44 Possibility of connecting an external display type EKA161 for display of P0, or EKA 162 for operation anddisplay of P0

48-49 Contact function for alarm signal48-50 Contact function for displacement of the suction

pressure reference or for alarm signal.51-52 Contact function for displacement of the condenser

pressure reference or for alarm signal.51-53 Room temperature. Sensor signal fra AKS 11, AKS 12

or EKS 11154-56 Air temperature at condenser outlet. Sensor signal

from AKS 11, AKS 12 or EKS 111

Data communication25-26 Mount only, if a data communication module has

been mounted.For ethernet communication the plug connectionRJ45 must be used. (LON FTT10 can also beconnected in this way.It is important that the installation of the datacommunication cable be done correctly. Cf. separateliterature No. RC.8A.C...

All inputs are low voltageAll relay outputs may behigh voltage

If an output is used for anunloader, the unloader's safetysignal must be downloaded fromthe compressor's satety circuit.

Unloader 1

Unloader 2


Data Ordering

epyT noitcnuF .onedoC

A135CKE rellortnocyticapaC 3008B480

B135CKE rellortnocyticapaC 4008B480

161AKE tinuyalpsiD 9107B480

261AKE snottubnoitarepohtiwtinuyalpsiD 2607B480

.scp1,m2tinuyalpsidrofelbaC 8927B480

.scp1,m6tinuyalpsidrofelbaC 9927B480

371AKE 01TTF,eludomnoitacinummocataD 2907B480

571AKE 584SR,eludomnoitacinummocataD 3907B480

771AKE tenrehtE,eludomnoitacinummocataD 2028B480

egatlovylppuS AV5,zH06/05%51-/+.c.aV42

langistupnIR23SKAepytsrettimsnarterusserP.scp2

0001TProftupnirosneserutarepmet.scp3C°52/mho0001CTProC°0/mho

morftupnielatigiD.noitcnuftcatnoc

noitalugerfopots/tratSrof.scp1

stiucricytefasfognirotinomrof.scp8

noitcnufmralarof.scp3

tnemecalpsidrofronoitcnufmralarof.scp2secnereferfo

roftuptuoyaleRnoitalugeryticapac

TSPS.scp8 )cimho(A3:1-CA)evitcudni(A2:51-CA

yalerpukcaB TSPS.scp1

yalermralA TDPS.scp1)cimho(A6:1-CA

)evitcudni(A3:51-CA

tuptuoegatloV .c.dV01-0

stuptuoyalpsiD161AKE yalpsidcP

261AKE0PdnanoitarepO

yalpsid

ataDnoitacinummoc

noitacinummocatadatcennocotelbissoPeludom

stnemnorivnE

noitarepognirud,C°55-0tropsnartgnirud,C°07-04-

gnisnednocton,hR%08-02

snoitarbiv/ecneulfnikcohsoN

erusolcnE 02PI

thgieW gk4.0

gnitnuoM llawnoroliarNID

slanimreT mm5.2.xam 2 erocitlum

slavorppA

sdnamedCMEdnaevitceriDegatlovwoLUE.htiwdeilpmocgnikram-ECer

NEdna1-03706NEot.ccadetset-DVL9-2-03706

3dna2-6-00016NEot.ccadetset-CME

Pressure transmitter / temperature sensorPlease refer to catalogue RK.0Y.G...

Display type EKA 161 / 162

When the unit is mounted on a wall,the two points on the DIN fasteningare cut off.

EKC 531

Only for front mounting (IP 40)Only connection via plugs

Installation considerationsAccidental damage, poor installation, or site conditions, cangive rise to malfunctions of the control system, and ultimatelylead to a plant breakdown.

Every possible safeguard is incorporated into our products toprevent this. However, a wrong installation, for example,could still present problems. Electronic controls are nosubstitute for normal, good engineering practice.

Danfoss wil not be responsible for any goods, or plantcomponents, damaged as a result of the above defects. It isthe installer's responsibility to check the installation thor-oughly, and to fit the necessary safety devices.

Special reference is made to the necessity of signals to thecontroller when the compressor is stopped and to the needof liquid receivers before the compressors.

Your local Danfoss agent will be pleased to assist withfurther advice, etc.

Mounting


Data communication

Example

Example of menu display in the AKM-programm

It is important that the installation of the data communicationcable is carried out correctly. Please refer to separateliterature No. RC.8A.C

This page contains a description of a few of the possibilities you willhave when the controller is provided with data communication.

Each controller is providedwith a plug-in module.

The controllers are thenconnected to a two-corecable.

The cable can be connectedto a gateway type AKA 243.

AKA 243 will now control thecommunication to and from thecontrollers.AKA 243 can control 60.

They will collect temperaturevalues and they will receivealarms. When there is an alarmthe alarm relay will be activated.

If contact is made to anexternal service company, thegateway can be connected to amodem.

When an alarm occurs fromone of the controllers, thegateway will - via the modem -make a phone call to theservice company.

At the service company amodem, gateway and PC withsystem software type AKMhave been installed.

All the controllers’ functions cannow be operated from thevarious menu displays.

The programme will forexample upload all thecollected temperature valuesonce a day.

AlarmsIf the controller is extended withdata communication, it will bepossible to define the impor-tance of the transmitted alarms.The importance is defined withthe setting: 1, 2, 3 or 0. Whenthe alarm then arises at sometime, it will result in one of thefollowing activities:

1 = AlarmThe alarm message is sent offwith alarm status 1. This meansthat the gateway that is themaster in the system will haveits alarm relay output activatedfor two minutes. Later, when thealarm ceases, the alarm text willbe retransmitted, but now withstatus value 0.

2 = MessageThe alarm text is transmittedwith status value 2. Later, whenthe “message” lapses, thealarm text is retransmitted, butnow with status value 0.

3 = AlarmAs “1”, but the master gate-way’s relay output is notactivated.

0 = Suppressed informationThe alarm text is stopped at thecontroller. It is transmittednowhere.

Measurements are shown atone side and settings at theother.

You will also be able to see theparameter names of thefunctions on page 4 - 8.

With a simple change-over thevalues can also be shown in atrend diagram.

If you wish to check earliertemperature measurements, youcan see them in the log collec-tion.


OverrideThe controller contains a number of functions that can beused together with the override function in the mastergateway. They can therefore only be used in combinationwith data communication.

noitacinummocatadaivnoitcnuF s’yawetagehtnidesuebotsnoitcnuFnoitcnufedirrevo

A135CKEniretemarapfonoitceleSx2.1.wS3008B480

sirosserpmocehtnehwnoitcejnifopotSdeppots

NOCKA NOtcejnICM---

kcabresthgiN eludehcsemitdnalortnocthgin/yaD kcabteSthgiN72r

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Emergency procedureIf the controller registers irregularities in the registered signals, it will start an emergency procedure:

For compressor regulation:- If the signal from the pressure transmitter becomes smaller than expected, the controller will continue operating with the

average capacity that has been cut in during the past 60 minutes. This cut-in capacity will gradually decline as time passes.- If the signal for the suction pressure becomes smaller than the set value of A11, the capacity will instantly be cut out.

For condenser regulation:- If the signal from the pressure transmitter becomes smaller than expected, or if the condensing pressure becomes bigger

than the set value of A30, the entire capacity will instantly be cut in.

Safety function

Monitoring of maximum discharge pressureThe function cuts in all condenser steps and gradually cuts out compressor steps, if the condensing pressure exceeds thepermitted value. The cutout limit is the setting in "A30".

The function starts at a value that is 3 K below the set value. At this point the entire condenser capacity is cut in at the sametime as 33% of the compressor capacity is cut out. (however min. one step). This is repeated for each 30-second interval.Thealarm function is activated.

If the temperature (pressure) rises to the set limit value, the following happens:- all compressor steps are immediately cut out- the condenser capacity remains cut in

The alarm ceases when the temperature (pressure) has dropped to the 3 K below the limit value for 60 seconds.

Renewed cut in of compressor steps is allowed when the temperature (pressure) has dropped to the 3 K below the limit value.Restart of the compressor is dependent on expiry of the restart timer.

Monitoring of minimum suction pressureThe function immediately cuts out all compressor steps if the suction pressure becomes lower than the permitted value. Thecut out limit is the setting in "A11".

Cut outs activate the alarm function.

The alarm ceases when the pressure (temperature) is above the cut out limit.

Renewed cut in of compressor steps is allowed when the alarm has stopped (the time delay has expired).


List of literature

Instructions EKC 531A: RI.8H.B (extract from this manual).EKC 531B: RI.8H.C (extract from this manual).Here you can see how controllers are mounted and programmed.

Installation guide for extended operation RC.8A.CHere you can see how a data communication connection to ADAP-KOOL® Refrigeration controls can beestablished.

RC

-ET

Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to productsalready on order provided that such alternations can be made without subsequential changes being necessary in specifications already agreed.All trademarks in this material are property of the respecitve companies. Danfoss and Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.

preface to ekc 531a and ekc 531b code number: 084b8003...

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