Danfoss ECL Comfort 310, A333 Operating instructions

OperatingGuide

ECLComfort310,applicationA333

1.0TableofContents

1.0TableofContents...............................................1

1.1Importantsafetyandproductinformation.....................2

2.0Installation........................................................5

2.1Beforeyoustart.....................................................5

2.2Identifyingthesystemtype......................................10

2.3Mounting...........................................................15

2.4Placingthetemperaturesensors................................18

2.5Electricalconnections.............................................20

2.6InsertingtheECLApplicationKey..............................50

2.7Checklist............................................................56

2.8Navigation,ECLApplicationKeyA333.........................57

3.0Dailyuse.........................................................62

3.1Howtonavigate...................................................62

3.2Understandingthecontrollerdisplay..........................63

3.3Ageneraloverview:Whatdothesymbolsmean?...........65

3.4Monitoringtemperaturesandsystem

components........................................................66

3.5Inﬂuenceoverview................................................67

3.6Manualcontrol.....................................................68

3.7Schedule............................................................69

4.0Settingsoverview............................................70

5.0Settings...........................................................73

5.1IntroductiontoSettings..........................................73

5.2Flowtemperature..................................................74

5.3Returnlimit.........................................................76

5.4Flow/powerlimit.................................................79

5.5Optimization........................................................82

5.6Controlparameters1..............................................87

5.7Controlparameters,reﬁllpump(s)..............................92

5.8Controlparameters,circulationpump(s)......................97

5.9Pumpcontrol.....................................................100

5.10Reﬁllwater........................................................103

5.11Reﬁlltank..........................................................110

5.12Application.......................................................113

5.13Watermeter......................................................117

5.14Flowmeter........................................................118

5.15S7,S8,S9,S10pressure.........................................121

5.16Alarm..............................................................124

6.0Commoncontrollersettings............................129

6.1Introductionto‘Commoncontrollersettings’..............129

6.2Time&Date.......................................................130

6.3Holiday............................................................131

6.4Inputoverview...................................................133

6.5Log.................................................................134

6.6Outputoverride..................................................135

6.7Keyfunctions.....................................................136

6.8System.............................................................138

7.0Miscellaneous................................................145

7.1ECA30/31setupprocedures.................................145

7.2Overridefunction................................................153

7.3Severalcontrollersinthesamesystem......................156

7.4Frequentlyaskedquestions....................................159

7.5Deﬁnitions........................................................162

7.6Type(ID6001),overview.......................................165

7.7ParameterIDoverview..........................................166

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1.1Importantsafetyandproductinformation

1.1.1Importantsafetyandproductinformation

ThisInstallationGuideisassociatedwithECLApplicationKeyA333

(ordercodeno.087H3818).

ThefunctionsarerealizedinECLComfort310foradvanced

solutions,e.g.M-bus,ModbusandEthernet(Internet)

communication.

TheapplicationA333complieswithECLComfortcontrollers310as

ofsoftwareversion1.11(visibleatstart-upofthecontrollerandin

‘Commoncontrollersettings’in‘System’).

TheapplicationA333workswiththeInternalI/OmoduleECA32

(ordercodeno.087H3202).

AdditionaldocumentationforECLComfort310,modulesand

accessoriesisavailableonwww.ecl.doc.danfoss.com.

Applicationkeysmightbereleasedbeforealldisplaytextsare

translated.InthiscasethetextisinEnglish.

Automaticupdateofcontrollersoftware(ﬁrmware):

Thesoftwareofthecontrollerisupdatedautomaticallywhenthekey

isinserted(asofcontrollerversion1.11(ECL210/310)andversion

1.58(ECL296)).Thefollowinganimationwillbeshownwhenthe

softwareisbeingupdated:

Progressbar

Duringupdate:

•DonotremovetheKEY

Ifthekeyisremovedbeforethehour-glassisshown,youhave

tostartafresh.

•Donotdisconnectthepower

Ifthepowerisinterruptedwhenthehour-glassisshown,the

controllerwillnotwork.

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OperatingGuideECLComfort310,applicationA333

SafetyNote

Toavoidinjuryofpersonsanddamagestothedevice,itisabsolutely

necessarytoreadandobservetheseinstructionscarefully.

Necessaryassembly,start-up,andmaintenanceworkmustbe

performedbyqualiﬁedandauthorizedpersonnelonly.

Locallegislationsmustberespected.Thiscomprisesalsocable

dimensionsandtypeofisolation(doubleisolatedat230V).

AfusefortheECLComfortinstallationismax.10Atypically.

TheambienttemperaturerangesforECLComfortinoperationare:

ECLComfort210/310:0-55°C

ECLComfort296:0-45°C.

Exceedingthetemperaturerangecanresultinmalfunctions.

Installationmustbeavoidedifthereisariskforcondensation(dew).

Thewarningsignisusedtoemphasizespecialconditionsthatshould

betakenintoconsideration.

Thissymbolindicatesthatthisparticularpieceofinformationshould

bereadwithspecialattention.

AsthisOperatingGuidecoversseveralsystemtypes,specialsystem

settingswillbemarkedwithasystemtype.Allsystemtypesareshown

inthechapter:'Identifyingyoursystemtype'.

°C(degreesCelsius)isameasuredtemperaturevaluewhereasK

(Kelvin)oftenisusedfortemperaturedifferences.

TheIDno.isuniquefortheselectedparameter.

ExampleFirstdigitSeconddigitLastthreedigits

1117411174

-

Circuit1Parameterno.

12174

1

2

174

-

Circuit2Parameterno.

IfanIDdescriptionismentionedmorethanonce,itmeansthatthere

arespecialsettingsforoneormoresystemtypes.Itwillbemarked

withthesystemtypeinquestion(e.g.12174-A266.9).

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OperatingGuideECLComfort310,applicationA333

ParametersindicatedwithanIDno.like"1x607"meanauniversal

parameter.

xstandsforcircuit/parametergroup.

DisposalNote

Thisproductshouldbedismantledanditscomponents

sorted,ifpossible,invariousgroupsbeforerecycling

ordisposal.

Alwaysfollowthelocaldisposalregulations.

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OperatingGuideECLComfort310,applicationA333

2.0Installation

2.1Beforeyoustart

TheA333applicationkeycontains3subtypes:A333.1,A333.2

andA333.3whicharealmostidentical.

Differentandextrafunctionsaredescribedadditionally.

TheapplicationA333.1isveryﬂexible.

Thesearethebasicprinciples:

Typically,theﬂowtemperatureisadjustedaccordingtoyour

requirements.

TheﬂowtemperaturesensorS3isthemostimportantsensor.The

desiredﬂowtemperatureatS3iscalculatedintheECLcontroller,

basedontheoutdoortemperature(S1)andthedesiredroom

temperature.Thelowertheoutdoortemperature,thehigherthe

desiredﬂowtemperature.

Bymeansofaweekschedule(upto3'Comfort'periods/day),the

heatingcircuitcanbein'Comfort'or'Saving'mode(twodifferent

temperaturevaluesforthedesiredroomtemperature).

InSavingmodetheheatingcanbereducedorswitchedofftotally.

ThemotorizedcontrolvalveM1isopenedgraduallywhentheﬂow

temperatureS3islowerthanthedesiredﬂowtemperatureand

viceversa.

Thereturntemperature(S5)canbelimited,forexamplenottobe

toohigh.Ifso,thedesiredﬂowtemperatureatS3canbeadjusted

(typicallytoalowervalue),thusresultinginagradualclosingof

themotorizedcontrolvalve.Furthermore,thereturntemperature

limitationcanbedependentontheoutdoortemperature.

Typically,thelowertheoutdoortemperature,thehigherthe

acceptedreturntemperature.

Inboiler-basedheatingsupplythereturntemperatureshouldnot

betoolow(sameadjustmentprocedureasabove).

AconnectedﬂoworenergymeterbasedonM-bussignalcan

limittheﬂoworenergytoasetmaximumvalue.Furthermorethe

limitationcanbeinrelationtotheoutdoortemperature.Typically,

thelowertheoutdoortemperature,thehighertheacceptedﬂow/

power.

ThecirculationpumpsP1andP2areoperatedalternately.One

circulationpumpisusedasworkingpumpandtheothercirculation

pumpisusedassparepump.Thecirculationpumpinquestionis

ONatheatdemandoratfrostprotection.Thealternationtime

canbesetasanumberofdaysandasettimeontheshiftday.A

solutionwithasinglecirculationpumpcanalsobeselected.

BymeansofthepressuredifferencebetweenS9andS10the

ECLcontrollerveriﬁesthatthecirculationpumpinquestionis

operating.

Thepressuredifferenceonthesecondarysideisbasedonthestatic

pressuresatS9andS10.Thepressuresaremeasuredas0-10volt

signals(frompressuretransmitters)andconverted(scaled)inthe

ECLcontrollertoappropriatepressurevalues.

ApplicationA333.1:

Theshowndiagramisafundamentalandsimpliﬁedexampleanddoes

notcontainallcomponentsthatarenecessaryinasystem.

AllnamedcomponentsareconnectedtotheECLComfortcontroller.

Listofcomponents:

ECL310

ElectroniccontrollerECLComfort310

S1

Outdoortemperaturesensor

S2

(Optional)Primarysupplytemperaturesensor.For

monitoringpurpose

S3

Secondaryﬂowtemperaturesensor

S4

(Optional)Secondaryreturntemperaturesensor.For

monitoringpurpose

S5

(Optional)Primaryreturntemperaturesensor

S7

(Optional)Primarysupplypressuresensor.Formonitoring

purpose

S8

(Optional)Primaryreturnpressuresensor.Formonitoring

purpose

S9

Secondaryﬂowpressuresensor

S10

Secondaryreturnpressuresensor

M1

Motorizedcontrolvalve(3-pointcontrolled)

P1/P2

Circulationpumps

P3/P4

Reﬁllwaterpumps

V1

Reﬁllwatervalve

V2

Pressurereleasevalve

A1

Alarm

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OperatingGuideECLComfort310,applicationA333

Ifanacceptablepressuredifferenceisnotdetected,theECL

controlleractivatesthealarmandshiftstheoperatingcommandto

theoppositecirculationpump.

TheheatingcanbeswitchedOFFautomaticallywhentheoutdoor

temperatureishigherthanaselectablevalue.

TheFrostprotectionmodemaintainsaselectableﬂowtemperature,

forexample10°C.

Incaseofatoolowpressure,measuredbyS10,thereﬁllwater

functionwillsupplementwithwaterfromawatersource.

AreﬁllpumpisswitchedONandtheON/OFFvalveV1opens.

ThereﬁllpumpsP3andP4areoperatedalternately.Onepumpis

usedasworkingpumpandtheotherpumpisusedassparepump.

Thealternationtimecanbesetasanumberofdays.

Asolutionwithasinglereﬁllpumpcanalsobeselected.

Incaseofatoohighpressure,measuredbyS10,thereleasevalve

V2(ON/OFF)willopeninordertoreducethepressure.

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OperatingGuideECLComfort310,applicationA333

TheapplicationA333.2isveryﬂexibleandworkslikeA333.1,

andwiththeseadditionalfeatures:

*

ThecirculationpumpsP1/P2can,asanalternativetoON-OFF

control,bespeedcontrolledbymeansofa0-10voltsignal.

ThedesiredpressuredifferencebetweenS9andS10issetfor

thespeedcontrolprocedure.

Aﬂow-meterF2(pulsesignal,analoguesignalS13orM-Bus)

measuresthecirculationofwaterintheheatingcircuit.

*

Thelevelinthereﬁllwaterstoragetankismeasuredby

meansofthepressuresensorS12.Whenatoolowpressure

ismeasured,theON/OFFvalveV3opens.Anacceptable

pressurewillclosetheV3valve.

*

ThereﬁllwaterpumpsP3/P4can,asanalternativetoON-OFF

control,bespeedcontrolledbymeansofa0-10voltsignal.

ThedesiredpressureatS10issetforthespeedcontrol

procedure.

Aﬂow-meterF1(pulsesignalorM-Bus)measurestheinjected

reﬁllwater.

ApplicationA333.2:

Theshowndiagramisafundamentalandsimpliﬁedexampleanddoes

notcontainallcomponentsthatarenecessaryinasystem.

AllnamedcomponentsareconnectedtotheECLComfortcontroller.

Listofcomponents:

ECL310

ElectroniccontrollerECLComfort310

ECA32

Built-inextensionmodule

S1

Outdoortemperaturesensor

S2

(Optional)Primarysupplytemperaturesensor.For

monitoringpurpose

S3

Secondaryﬂowtemperaturesensor

S4

(Optional)Secondaryreturntemperaturesensor.For

monitoringpurpose

S5

(Optional)Primaryreturntemperaturesensor

S7

(Optional)Primarysupplypressuresensor.Formonitoring

purpose

S8

(Optional)Primaryreturnpressuresensor.Formonitoring

purpose

S9

Secondaryﬂowpressuresensor

S10

Secondaryreturnpressuresensor

F1

(Optional)Flowmeter(pulseorM-bussignal)

F2

(Optional)Flowmeter(pulse,0-10voltorM-bussignal)

M1

Motorizedcontrolvalve(3-pointcontrolled)

M2

Speedcontrol(0-10volt)ofP3/P4

M3

Speedcontrol(0-10volt)ofP1/P2

P1/P2

Circulationpumps

P3/P4

Reﬁllwaterpumps

V1

Reﬁllwatervalve

V2

Pressurereleasevalve

V3

Reﬁllwatertankvalve

A1

Alarm

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OperatingGuideECLComfort310,applicationA333

TheapplicationA333.3isveryﬂexibleandworkslikeA333.2,

butwiththisfeature:

*

ThemotorizedcontrolvalveM1iscontrolledbymeansofa

0-10voltsignal.

ApplicationA333.2:

Theshowndiagramisafundamentalandsimpliﬁedexampleanddoes

notcontainallcomponentsthatarenecessaryinasystem.

AllnamedcomponentsareconnectedtotheECLComfortcontroller.

Listofcomponents:

ECL310

ElectroniccontrollerECLComfort310

ECA32

Built-inextensionmodule

S1

Outdoortemperaturesensor

S2

(Optional)Primarysupplytemperaturesensor.For

monitoringpurpose

S3

Secondaryﬂowtemperaturesensor

S4

(Optional)Secondaryreturntemperaturesensor.For

monitoringpurpose

S5

(Optional)Primaryreturntemperaturesensor

S7

(Optional)Primarysupplypressuresensor.Formonitoring

purpose

S8

(Optional)Primaryreturnpressuresensor.Formonitoring

purpose

S9

Secondaryﬂowpressuresensor

S10

Secondaryreturnpressuresensor

F1

(Optional)Flowmeter(pulseorM-bussignal)

F2

(Optional)Flowmeter(pulse,0-10voltorM-bussignal)

M1

Motorizedcontrolvalve(0-10voltcontrolled)

M2

Speedcontrol(0-10volt)ofP3/P4

M3

Speedcontrol(0-10volt)ofP1/P2

P1/P2

Circulationpumps

P3/P4

Reﬁllwaterpumps

V1

Reﬁllwatervalve

V2

Pressurereleasevalve

V3

Reﬁllwatertankvalve

A1

Alarm

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OperatingGuideECLComfort310,applicationA333

ApplicationA333ingeneral:

UptotwoRemoteControlUnits,theECA30canbeconnectedto

oneECLcontrollerinordertocontroltheECLcontrollerremotely.

Exerciseofcirculationpumpsandcontrolvalveinperiodswithout

heatingdemandcanbearranged.

AdditionalECLComfortcontrollerscanbeconnectedviatheECL

485businordertoutilizecommonoutdoortemperaturesignal,

timeanddatesignals.TheECLControllersintheECL485system

canworkinmaster-slavesystem.

Aconnectedﬂoworenergymeter(basedonM-bussignal)can

limittheﬂoworenergytoasetmaximumandinrelationtothe

outdoortemperature.

Unusedinputcan,bymeansofanoverrideswitch,beusedto

overridethescheduletoaﬁxed'Comfort'or'Saving'mode.

ModbuscommunicationtoaSCADAsystemcanbeestablished.

TheM-busdatacanfurthermorebetransferredtotheModbus

communication.

AlarmA1(=relay6)canbeactivated:

•iftheactualﬂowtemperaturediffersfromthedesiredﬂow

temperature.

•ifatemperaturesensororitsconnectiondisconnects/short

circuits.(See:Commoncontrollersettings>System>Raw

inputoverview).

•ifthecirculationpump(s)do(es)notgenerateacceptable

pressure.

•ifthereﬁllwaterpump(s)do(es)notgenerateacceptable

pressure.

•ifmeasuredpressuresarenotinsideanacceptablepressure

range.

Thecontrollerispre-programmedwithfactorysettingsthatareshown

inthe‘ParameterIDoverview’appendix.

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OperatingGuideECLComfort310,applicationA333

2.2Identifyingthesystemtype

Sketchyourapplication

TheECLComfortcontrollerseriesisdesignedforawiderange

ofheating,domestichot-water(DHW)andcoolingsystemswith

differentconﬁgurationsandcapacities.Ifyoursystemdiffers

fromthediagramsshownhere,youmaywanttomakeasketch

ofthesystemabouttobeinstalled.Thismakesiteasiertouse

theOperatingGuide,whichwillguideyoustep-by-stepfrom

installationtoﬁnaladjustmentsbeforetheend-usertakesover.

TheECLComfortcontrollerisauniversalcontrollerthatcanbe

usedforvarioussystems.Basedontheshownstandardsystems,

itispossibletoconﬁgureadditionalsystems.Inthischapteryou

ﬁndthemostfrequentlyusedsystems.Ifyoursystemisnotquite

asshownbelow,ﬁndthediagramwhichhasthebestresemblance

withyoursystemandmakeyourowncombinations.

SeetheInstallationGuide(deliveredwiththeapplicationkey)for

applicationtypes/sub-types.

Thecirculationpump(s)inheatingcircuit(s)canbeplacedintheﬂow

aswellasthereturn.Placethepumpaccordingtothemanufacturer’s

speciﬁcation.

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OperatingGuideECLComfort310,applicationA333

A333.1,ex.a

Heatingsystemwithcontrolofupto2circulationpumpsandupto2reﬁllwaterpumps

A333.1,ex.b

Basicheatingsystem

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OperatingGuideECLComfort310,applicationA333

A333.1,ex.c

Heatingsystemwithcirculationpumpfeedback

A333.1,ex.d

Heatingsystemwithreﬁllwatersystem

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OperatingGuideECLComfort310,applicationA333

A333.1,ex.e

Heatingsystemwithreﬁllwaterandexcesspressuresystem

A333.2,ex.a

HeatingsystemwithON/OFFandspeedcontrolofupto2circulationpumpsandupto2reﬁllwaterpumps.Reﬁllwaterstoragecontrol.

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OperatingGuideECLComfort310,applicationA333

A333.3,ex.a

HeatingsystemwithON/OFFandspeedcontrolofupto2circulationpumpsandupto2reﬁllwaterpumps.Reﬁllwaterstoragecontrol.

ControlvalveM1iscontrolledby0-10voltsignal.

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OperatingGuideECLComfort310,applicationA333

2.3Mounting

2.3.1MountingtheECLComfortcontroller

SeetheInstallationGuidewhichisdeliveredtogetherwiththe

ECLComfortcontroller.

Foreasyaccess,youshouldmounttheECLComfortcontrollernear

thesystem.

ECLComfort210/296/310canbemounted

•onawall

•onaDINrail(35mm)

ECLComfort296canbemounted

•inapanelcut-out

ECLComfort210canbemountedinanECLComfort310basepart

(forfutureupgrade).

Screws,PGcableglandsandrawlplugsarenotsupplied.

LockingtheECLComfort210/310controller

InordertofastentheECLComfortcontrollertoitsbasepart,secure

thecontrollerwiththelockingpin.

Topreventinjuriestopersonsorthecontroller,thecontrollerhasto

besecurelylockedintothebase.Forthispurpose,pressthelocking

pinintothebaseuntilaclickisheardandthecontrollernolonger

canberemovedfromthebase.

Ifthecontrollerisnotsecurelylockedintothebasepart,thereisarisk

thatthecontrollerduringoperationcanunlockfromthebaseandthe

basewithterminals(andalsothe230Va.c.connections)areexposed.

Topreventinjuriestopersons,alwaysmakesurethatthecontroller

issecurelylockedintoitsbase.Ifthisisnotthecase,thecontroller

shouldnotbeoperated!

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OperatingGuideECLComfort310,applicationA333

Theeasywaytolockthecontrollertoitsbaseorunlockitistousea

screwdriveraslever.

Mountingonawall

Mountthebasepartonawallwithasmoothsurface.Establishthe

electricalconnectionsandpositionthecontrollerinthebasepart.

Securethecontrollerwiththelockingpin.

MountingonaDINrail(35mm)

MountthebasepartonaDINrail.Establishtheelectrical

connectionsandpositionthecontrollerinthebasepart.Secure

thecontrollerwiththelockingpin.

DismountingtheECLComfortcontroller

Inordertoremovethecontrollerfromthebasepart,pulloutthe

lockingpinbymeansofascrewdriver.Thecontrollercannowbe

removedfromthebasepart.

Theeasywaytolockthecontrollertoitsbaseorunlockitistousea

screwdriveraslever.

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OperatingGuideECLComfort310,applicationA333

BeforeremovingtheECLComfortcontrollerfromthebasepart,ensure

thatthesupplyvoltageisdisconnected.

2.3.2MountingtheRemoteControlUnitsECA30/31

Selectoneofthefollowingmethods:

•Mountingonawall,ECA30/31

•Mountinginapanel,ECA30

Screwsandrawlplugsarenotsupplied.

Mountingonawall

MountthebasepartoftheECA30/31onawallwithasmooth

surface.Establishtheelectricalconnections.PlacetheECA30/

31inthebasepart.

Mountinginapanel

MounttheECA30inapanelusingtheECA30framekit(ordercode

no.087H3236).Establishtheelectricalconnections.Securethe

framewiththeclamp.PlacetheECA30inthebasepart.TheECA

30canbeconnectedtoanexternalroomtemperaturesensor.

TheECA31mustnotbemountedinapanelifthehumidity

functionistobeused.

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OperatingGuideECLComfort310,applicationA333

2.4Placingthetemperaturesensors

2.4.1Placingthetemperaturesensors

Itisimportantthatthesensorsaremountedinthecorrectposition

inyoursystem.

Thetemperaturesensormentionedbelowaresensorsusedforthe

ECLComfort210/296/310serieswhichnotallwillbeneeded

foryourapplication!

Outdoortemperaturesensor(ESMT)

Theoutdoorsensorshouldbemountedonthatsideofthebuilding

whereitislesslikelytobeexposedtodirectsunshine.Itshouldnot

beplacedclosetodoors,windowsorairoutlets.

Flowtemperaturesensor(ESMU,ESM-11orESMC)

Placethesensormax.15cmfromthemixingpoint.Insystems

withheatexchanger,DanfossrecommendsthattheESMU-typeto

beinsertedintotheexchangerﬂowoutlet.

Makesurethatthesurfaceofthepipeiscleanandevenwhere

thesensorismounted.

Returntemperaturesensor(ESMU,ESM-11orESMC)

Thereturntemperaturesensorshouldalwaysbeplacedsothatit

measuresarepresentativereturntemperature.

Roomtemperaturesensor

(ESM-10,ECA30/31RemoteControlUnit)

Placetheroomsensorintheroomwherethetemperatureistobe

controlled.Donotplaceitonoutsidewallsorclosetoradiators,

windowsordoors.

Boilertemperaturesensor(ESMU,ESM-11orESMC)

Placethesensoraccordingtotheboilermanufacturer’s

speciﬁcation.

Airducttemperaturesensor(ESMB-12orESMUtypes)

Placethesensorsothatitmeasuresarepresentativetemperature.

DHWtemperaturesensor(ESMUorESMB-12)

PlacetheDHWtemperaturesensoraccordingtothemanufacturer’s

speciﬁcation.

Slabtemperaturesensor(ESMB-12)

Placethesensorinaprotectiontubeintheslab.

ESM-11:Donotmovethesensorafterithasbeenfastenedinorderto

avoiddamagetothesensorelement.

ESM-11,ESMCandESMB-12:Useheatconductingpasteforquick

measurementofthetemperature.

ESMUandESMB-12:Usingasensorpockettoprotectthesensorwill,

however,resultinaslowertemperaturemeasurement.

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OperatingGuideECLComfort310,applicationA333

Pt1000temperaturesensor(IEC751B,1000Ω/0°C)

Relationshipbetweentemperatureandohmicvalue:

VI.GU.T2.02

OperatingGuideECLComfort310,applicationA333

2.5Electricalconnections

2.5.1Electricalconnections230Va.c.

Thecommongroundterminalisusedforconnectionofrelevant

components(pumps,motorizedcontrolvalves).

ECL210/310

ECL296

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OperatingGuideECLComfort310,applicationA333

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Danfoss ECL Comfort 310, A333 Operating instructions

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