FläktGroup EUKN Combi Cooler Installation guide

Brand: FläktGroup

Model: EUKN Combi Cooler

Category: Split-system air conditioners

Type: Installation guide

Fläkt Woods 8760 GB 2009.12 1 Subject to alteration.

EU Air Handling Unit INSTALLATION AND MAINTENANCE INSTRUCTIONS

EUKN Combi Cooler

Safety instructions

IMPORTANT INFORMATION!

– Studytheunit’sinstallationandmaintenanceinstructions

carefullypriortostarting/operating/servicing/maintain-

ing/dismantlingit.Keeptheseinstructionsforfutureuse.

–Allserviceandmaintenancemustbecarriedoutby

experts.Theservice/maintenanceofcoolingandwater

systemsmayonlybecarriedoutbyauthorisedcompa-

niesusingcertiedpersonnelinaccordancewithEu-

ropeanUnionRegulation303/2008andthenecessary

protectiveequipment.

- Thenecessaryprotectiveequipmentshouldinclude

safetygogglesandgloves.

–Automaticstart!Openandlockthecoolingunit’smain

circuitbreakerbeforestartinganywork.

– DoNOTtreadontheunit.

– Useonlyoriginalspareparts.

Disregarding any of the above points can lead to a seri-

ous safety risk and the withdrawal of the guarantee/

product liability.

Lifting

Becauseofitsdesign,thecentreofgravityisoffsetto-

wardstheinspectionside.Thismustbetakenintoac-

countwhenliftingtheunitinanyway.Theunitshould

rstbeliftedslightly,andthencheckedsothatitdoesnot

tiltorappearunstablebeforebeingliftedhigher.

Duty of notiﬁcation and in-service inspection

Duty of notiﬁcation

Iftheamountofrefrigerantinaunitexceeds10kgthesu-

pervisoryauthorities,generallytheenvironmentalhealth

department,mustbeinformed.Thisinformationmustbe

providedwellinadvanceofinstallation.Moreinformation

aboutthisiscontainedinlocalrefrigerantlegislation.

Theunitmustbecommissionedbyauthorised

FläktWoodspersonnel.

Leak tracing during installation and in-service

inspection

Aleakageinspectionmustbecarriedoutduringinstalla-

tioniftheunitcontainsmorethan3kgofrefrigerant(see

localrestrictions).Iftheunitcontainsbetween3kgand

30kgofrefrigerant,theunitmustbeinspectedforleak-

ageatleasteverytwelvemonths.Thisconformstothe

EUregulationonuorinatedgreenhousegases842/2006.

Lifting and transport

Theunitcanbeliftedbyitsliftingeyesifitsweightdoes

notexceed1,050kg.Iftheunitweighsmorethan1,050kg,

itmustbeliftedbyaforklifttruckfrombelowusingthe

speciedholes.Liftingtheunitotherthanbyusingthe

speciedholescancausetheunittooverturnduetothe

offsetcentreofgravity.

IMPORTANT!Theunit’scentreofgravityisnotinthe

centreoftheunit.Alwaystakethisintoaccountwhen

liftingtheunit.

Requirements related to the ﬂoor

Theoormustbelevel.Thisistoavoidtorsionalforces

andstresseswhichcoulddamagetheinternalpipework

intherefrigerantcircuitandbrinesystem.Thebase

framemustnotberemoved.

Requirements related to siting

Theunitmustbeinstalledinsuchawaythatallowsser-

viceinaccordancewiththisservicemanual.

Weight

1050 kg

MAX.

Theunit’scentreofgravityisnot

inthecentreoftheunit.

FWG_AHU_EUKN Combi Cooler_Installation and maintenance_8760_GB_200912

EU size Output variant Weight

1 596

2 645

3 648

1 722

2 730

3 741

1 902

2 959

3 1015

1 1097

2 1097

3 1117

1 1215

2 1245

3 1258

Fläkt Woods 8760 GB 2009.12 2 Subject to alteration.

EU Air Handling Unit INSTALLATION AND MAINTENANCE INSTRUCTIONS

EUKN Combi Cooler

Controls and electrical

TheCombiCoolercanbeconnectedtoanexternalcon-

trolsysteminseveralways.Thetwomostcommonare

shownbelow.

Option1describeshowtheintegratedcontrolunitcanbe

maximised.Thisoptionhasanumberofadvantagesover

option2.Thisisbecausethesystemiscontrolledopti-

mally,basedonthealltheexpertisegainedfromproduct

development.

Power supply

3 x 400 AC

3 3

5 5

4 4

Supply air coil

Valve actuator

Interlocked by the

outdoor temperatur

Interlocked by the

extract air fan

To be connected to the

main circuit breaker

Room condensation

indication

CP2 Operation

Signal for slow

valve closure

Summation alarmCooler alarm

Unit interlocked

by CP2

3 3

0 4 min

External

Combi Cooler

BMS/Unit

Room conden-

sation sensor

Chilled beam water

temperature sensor

Chilled beam water

valve actuator

Q11

Q12

24 V AC

Gnd

0 - 10 V DC

24 V AC

Gnd

0 - 10 V DC

24 V AC

Gnd

Min value

Gnd

Option2describeshowmuchofthisfunctionalityis

transferredtoanexternalcontrolsystem.Whenthistype

ofconnectionisusedtheexternalcontrolsystemmust

dealwithsomefunctionsthatarecrucialtothesystem’s

performance.

Option 1. Option 2.

Cooler alarm Summation

alarm

Condensation

alarm

CP2 Operation

Supply air coil

Valve actuator

Interlocked by the

outdoor temperature

Interlocked by the

extract air fan

Room conden-

sation indication

Room conden-

sation sensor

Chilled beam

water temper-

ature sensor

Chilled beam

water valve

actuator

Power supply

3 x 400 AC

To be connected to the

main circuit breaker

Unit interlocked

by CP2

24 V AC

Gnd

0 - 10 V DC

3 3

Q11

Q12

165

3 3

5 5

4 4

Combi CoolerBMS/Unit

External

Fläkt Woods 8760 GB 2009.12 3 Subject to alteration.

EU Air Handling Unit INSTALLATION AND MAINTENANCE INSTRUCTIONS

EUKN Combi Cooler

Unit size

Power

model

Comp. 1 Comp. 2 Min.

fuse

Refrigerant,

kW A kW A (A) Circu-

it 1

Circu-

it 2

1 9.2 4.9 14.1 6.9 25 8.5 5.5

2 9.2 4.9 21.1 11.5 40 9.5 5.5

3 11.9 6.4 24.5 13.2 50 11 6.5

1 11.9 6.4 21.1 11.5 40 12 7

2 14.1 6.9 24.5 13.2 50 13.5 9

3 15.7 8.7 30 16.2 63 15.5 9

1 15.7 8.7 30 16.2 63 16 9.5

2 21 11.5 36 18.6 80 17 10

3 21 11.5 48 22.8 80 17.5 10

1 17 10.1 48 22.8 80 19.5 11

2 25 13.2 48 22.8 80 19.5 11.5

3 25 13.2 59 31.8 100 21 11.5

1 25 13.2 48 22.8 100 22 12

2 30 16.2 59 31.8 120 22.5 13

3 30 16.2 75 37.2 120 23 14

IMPORTANT! Thesettingofthefrostprotection

sensorsmustnotbealtered.Thiscouldleadto

frostburstingtheexchangers.Burstpipesdueto

frostwillresultinmajorleakageofuidandrisk

ofcompressordamage.

Frost protection sensors

Component description

Control unit (RC1)

Thecontrolunitislocatedinthecontrolcabinet.

SeedescriptiononPage9.

Control circuit fuse

Resettheautomaticfusebypullingthegreencontrol

upwards.

Main circuit breaker

Themaincircuitbreakerisusedtoswitchthecooling

unitoffandon.Whenperformingworkonthecool-

ingunit,alwaysopenandlockthemaincircuitbreaker.

Certainterminalblockscanbeliveevenwhenthecircuit

breakerisswitchedoff,suchastheterminalblocksfor

outgoingsummationalarms.

ThecontrolcircuitfusedoesNOTcutthepower

totheentirecoolingunit.Whenperforming

workonthecoolingunit,alwaysopenandlock

themaincircuitbreaker.

Electrical data, fuse protection and amount

of refrigerant

Nominal current.

Choice of cable

Thechoiceofcabledependsonthemethodofinstalla-

tion.Thecablemustbedimensionedbyanauthorised

electrician.

Fuse protection

Theleveloffuseprotectionmustbedecidedbyanauthor-

isedelectricianbasedonthecurrentsindicatedinthetable.

Fläkt Woods 8760 GB 2009.12 4 Subject to alteration.

EU Air Handling Unit INSTALLATION AND MAINTENANCE INSTRUCTIONS

EUKN Combi Cooler

IMPORTANT!Theremustbenoadditives

inthewater.

Actual ﬂow: Green LEDs

Alarm limit: Orange LED

Triggered alarm: Red LED

The brine circuit

Thebrinecircuitmustbelledwithdeacidiedwater.

Otherwisethereisariskofstandingairinthesystemthat

canleadtoimpairedperformance.

Brine connections – general

Connectedpipesaretohaveasfewbendsandvariations

insizeaspossible.Ifthepressuredropistoohigh,the

pumpwillnotprovidethedesignow,leadingtoinsuf-

cientheattransferintheheatexchangers.Ensurethat

thepipesystemisushedanddrainedbeforeconnection

tothecoolingunit.

Automatic or manual bleed valves

Automaticormanualbleedvalvesmustbeinstalledin

enoughplacestobleedthesystem.

Drain valve

Thedrainvalvemustbeinstalledatthelowestpointin

ordertodrainthesystem.

Leakage testing

Aleaktightnesstestmustbecarriedoutbeforeinsulating

thepipes.

Expansion forces on the connections

Allconnectionsforthebrineandtheexternalheatingsys-

temoutputsonthecoolingunitmustbemadeinsucha

waythattherearenoforcesactingonthemcausedbythe

thermalexpansionofthepipes.

Leakage testing

Aleaktightnesstestmustbecarriedoutbeforeinsulating

thepipes.

Insulating the pipes

Allpipesmustbeinsulatedtopreventcondensation.The

insulationmustbediffusiontight.Itmustbepossibleto

accessbleedvalvesanddrainvalvesfollowinginsulation.

Filter (max. gauge = 500 μm)

Itisessentialthatthewaterisfreeofimpurities.Ifnot

theheattransferintheheatexchangerswillbereduced

astheygetdirty.Intheworstcasetheexchangercanbe

permanentlydamaged.Theltershouldbemountedon

thewatercircuit’sinlettothecoolingunit,inaposition

whereitcanbeeasilyushedorreplaced.

Forsimplicity’ssakethereshouldbeshut-offvalves

onbothsidesofthelter.

Brine

Thecoolingunitisdesignedforpurewater.Inother

words,thereshouldbenoadditivesinthewater.

Expansion tank

Theexpansiontankshouldbeinstalledinasuitableloca-

tion.

Adjusting the ﬂow switch

Thefunctionoftheowswitchistostopthecompres-

sorsifthebrineowdropsbelowacriticallevelorstops

completely.

Becauseeverycoolingunitundergoespre-delivery

testing,theowswitchisfactoryset.Testingiscarried

outattheowsetoutintable1.However,thisadjust-

mentmuststillbecheckedduetopossibledifferencesin

owmeasurementmethods.

Step 1 – Calibrate the ﬂow switch

1.Checkthatthebrineowistheintendedoperatingow.

2.Presstherightbutton(blackarrow)forveseconds.

3.Theowswitchisnowcalibrated.

Step 2 – Setting the alarm limit

Setthealarmlimit(orangeLED)bypressingtheblackor

whitearrow.Thealarmlimitisrecommendedtobeset

about2-3LEDsbelowthetopgreenLED.

Fläkt Woods 8760 GB 2009.12 5 Subject to alteration.

EU Air Handling Unit INSTALLATION AND MAINTENANCE INSTRUCTIONS

EUKN Combi Cooler

Following a ﬂow alarm

Checkwhythealarmwasgenerated.Possiblecauses:

• Dirtinthesystem.

• Incorrectlysetowswitch.

• Thebrinepumpisdefectiveorincorrectlyset.

Frost protection

Afrostprotectionsensormustbeinstalledinthesupply

aircoiltopreventitfreezing.

Unit speciﬁc ﬂow

Table 1.

Therightowthroughtheevaporatorshastobesetin

accordancewithtable1.Thesafetyandfunctionofthe

coolingunitareatriskifaowotherthanthespecied

intable1isused.

The coil circuit

Unit size Water ﬂow in the coil, l/s

21,22 0.3-0.63

21,22,31 0.63-1.0

22,31,32,33 1.0-1.6

32,33 1.6-2.5

EU size Power model Brine ﬂow l/s

1 0.93

2 1.21

3 1.45

1 1.31

2 1.54

3 1.82

1 1.83

2 2.27

3 2.75

1 2.59

2 2.91

3 3.34

1 2.91

2 3.54

3 4.18

Flow through the supply air coil

Theowthroughthesupplyaircoilhastobeadjustedto

obtainthecorrectpowerdistributionbetweenthesupply

airandthechilledbeamcircuit.Theowisbothadjusted

andmeasuredwiththeSTADvalvelocatedinsidethe

CombiCooler.Therightowoverthesupplyaircoilis

availableintheunitdocumentation.Thetechnicalsales

supportdivisionatFläktWoodshastobecontactedifthe

unitdocumentationisnotsuppliedatdelivery.

Fläkt Woods 8760 GB 2009.12 6 Subject to alteration.

EU Air Handling Unit INSTALLATION AND MAINTENANCE INSTRUCTIONS

EUKN Combi Cooler

Water-cooled condenser

Thewater-cooledcondenserisactivatedbyanautomatic

waterregulatingvalve.Thewaterregulatingvalveisfac-

torysetandshouldnotbeadjusted.Incorrectadjustment

canresultinhighwaterconsumption.

Connecting the water-ﬁlled condenser

Ifthereisawater-cooledcondenser,tapwateratamini-

mum0.5andmaximum10barpressuremustbecon-

nected.Tapwateristobeconnectedusingasuitableun-

ion.Outgoingpipesare15mmcopperpipe.Followthe

arrowscarefully.Waterleavingthewater-lledcondenser

canbeconnectedtoanaccumulatortanksoastorecover

theheat.Incoolingunitswithawater-cooledcondenser

thetapwaterinletcannotbeclosed.

Drainage from a water-ﬁlled condenser

Whenthewater-cooledcondenserisinuse,itmustbe

drainedtoanoutow.Ifthisdoesnottakeplace,thereis

ariskofwaterdamage.Drainagetakesplacethroughthe

copperpipeonthefrontofthecoolingunitbeneaththe

inspectionhatch.Thewhiteplasticpipeisforcondensate

runofffromthesupplyaircoilandshouldbeconnected

toawatertrap.

IMPORTANT!Becausethewatervalvegovern-

ingtheowthroughthewater-cooledcondenser

isdownstreamofthecondenser,nonon-return

valves,orvalveswithasimilarfunction,canbe

mountedupstreamofthecondenser.Ifthisisdone

thereisariskofthermalexpansioninthetrapped

water,withamajorwaterleakageasaresult.

Runoff from the water-filled condenser

Runoff from the supply air coil

Installation and commissioning

Checklist

IMPORTANT!Alwaysstudythesafetyinstructionson

Page1priortocarryingoutanywork.Theunitmustnot

becommissionedbeforeitsinstallationhasbeeninspect-

edinaccordancewiththefollowinglist.

Before startup, check the following:

General

– Transportdamage,installationsite(goodlighting,

levelsurfaceetc.)

– Condensationdrain

– Oillevelincompressors

– Runofffromthewater-lledcondenser

Refrigerant circuit

– Leakageofrefrigerant,leakageofcompressoroil

– Crankcaseheaterinoperation

Electrical connection and control – checking for loose

cables

– Phasesequenceandpost-tighteningpowerconnections.

– Post-tighteningallwiringincludingthoseforcontrol

signals.

– Coolingstartsignalfromtheairhandlingunit.

– Coolingrecoverynotactivatedinthemainunit.

– Valvegoverningthewatertemperaturetothechilled

beamcircuitconnected.

– Temperaturesensorsonthechilledbeamcircuitcon-

nected.

Brine – brine circuit leakage

– Hasthesystembeenbled?

– Filterinstalled

– Pumpsforthesupplyaircoilandmaincircuitworking

– Pumpforthechilledbeamcircuitworking

– Checkfortheneedforanaccumulatortank

Starting the EUKN cooling unit

Thecrankcaseheatersmusthavebeeninoperationforat

least24hoursbeforecommissioning:

1.Setthecompressormotorcircuitbreakerto

position0(Off).

2.Setthemaincircuitbreakerinthecoolingunittoposi-

tion1(On)andactivatethecontrolcircuitfuse.The

compressorsarenowheatedbythecrankcaseheater.

Fläkt Woods 8760 GB 2009.12 7 Subject to alteration.

EU Air Handling Unit INSTALLATION AND MAINTENANCE INSTRUCTIONS

EUKN Combi Cooler

Function

Thecompressorsareconnectedinthreecoolingstages.

Theoutgoingwatertemperaturedependsonwhether

thereisariskofcondensationinthechilledbeamsornot.

SeePage9foradescriptionofthecontrolunit.

Theairhandlingunitcanbeusedforbothsupplyair

andextractaircontrol.Thecoolingunitmustbeinter-

lockedbytheextractairfanandmainpump(andany

outdoorthermostat).Itisimportantthatthecompressors

stopiftheextractairfanstops.Thecoolingunitisalsoin-

ternallyinterlockedbyaowswitchinthewatercircuit

andthepumpforthesupplyaircoil.

Becauseofthelocationofthecondensercoil,thecool-

ingrecoveryfunctioncannotoperateintheunitwhilethe

coolingunitisinoperation.

Overriding the chilled beam circuit valve

Iftheheatingloadonthechilledbeamcircuitexceedsthe

designcoolingpower,thevalvefortheoutgoingwater

temperaturetothechilledbeamcircuitwillbeoverridden,

soastoprioritizethesupplyaircoil.Thisistoensurethat

thesupplyaircoilcandehumidifyairwhenrequired.If

thisfunctionisnotusedintheintegratedcontrolunit,it

mustbeaddedtothecontrollerthatreplacesit.

Capacity regulation

Thecapacityofeachcircuitisregulatedindividually.Ifthe

pressureistoohigh,oneorbothofthecompressorswillbe

shutdown.Thisistomaintainashighacoolingpoweras

possibleandtopreventashutdownthatwouldrequirea

manualreset.Thecompressorsarerestartedinsequence.

Water-cooled condenser

Awater-cooledcondensercanbeorderedasanoption.

Ifthecondenserheatcannotbereleasedtotheextract

air,thecondensertemperaturewillrise.Inthatcasethe

water-cooledcondenserisautomaticallyengagedat60°C

toreducethetemperature.

Cooling unit

Inspecting the sight glasses

Theunithastwosightglasses,onemountedbetweenthe

condensercoilandsubcoolingcoil,andtheotherdown-

streamofthesubcoolingcoil.

Thepurposeoftherstsightglassistocheckwhether

gasisenteringthesubcooler.Ifthisisthecase,thesub-

coolerwillnotoperateoptimallyandwilljustactasan

extensionofthecondensercoil.Itisdifculttoavoida

smallamountofgas,butlargeamountscanbeanindi-

cationthatthereistoolittlerefrigerantinthesystem.

Becausetheamountisadjustedatthefactory,thismeans

thatthereisariskofleakageintherefrigerantcircuit.

Checking subcooling

Subcoolingcanbecheckedbymeasuringthetemperature

differencebetweentheinletandoutletofthesubcooling

coil.

Superheating

Thecorrectdegreeofsuperheatingisimportantforopti-

mumandreliableoperation.Ifsuperheatingistoogreat,

thehotvapourdownstreamofthecompressorwillget

unnecessarilyhot.Ifsuperheatingisinsufcientthereisa

riskofliquidleakingintothecompressor.Thiscanresult

incompressordamage.

Condensation temperature

Attimesthecondensationtemperaturecanbequitehigh,

almost60°C.Thisisnormal.Thesystemisdesignedfor

suchtemperatures.

Inspection

Thefunctionofthecoolingunitcanbetestedbycheck-

ingthetemperaturedifferencewiththecontrolunit.

Thischeckcanalsobecarriedoutduringmaintenancein

ordertocheckthecleanliness/performanceoftheheat

exchangersinthesystem.

After startup, check the following:

– Operatingows

– Flowtothesupplyaircoilandmaincircuitcorrect

– Informationtopersonnelundertaken.

EU size Power model Nominal power with

water at 18/12

1 23

2 30

3 36

1 33

2 39

3 46

1 46

2 57

1 69

1 65

2 72

3 84

1 72

2 89

3 105

Nominal cooling capacity

Fläkt Woods 8760 GB 2009.12 8 Subject to alteration.

EU Air Handling Unit INSTALLATION AND MAINTENANCE INSTRUCTIONS

EUKN Combi Cooler

Control

Thecoolingunitsuppliescoldwaterinthebrinecircuit

totheintegratedsupplyaircoilandtothechilledbeam

circuit.Hotwaterentersthecircuitviatheintegrated

plateheatexchanger.

Thevalvegoverningtheamountofwatertothesupply

aircoilandplateheatexchangeriscontrolledbyexternal

controlequipment.Thevalveandvalveactuatorforthe

supplyaircoilaremountedinthecoolingunit,andare

includedinthedelivery.Thevalveandvalveactuatorfor

theplateheatexchangerarenotincludedinthedelivery,

butareavailableasaccessories.

Thecoolingunitgovernsboththetemperaturetothe

maincircuitandtothechilledbeamcircuit.Bothofthese

setpointschangedependingonwhethertheunitisin

normaloperationorsetpointoffset(riskofcondensation).

Normal operation

Thecompressorsarecontrolledbythereturntemperature

fromthechilledbeamcircuit.Ifthesystemiscorrectly

adjusted,theoutputtemperatureinthemaincircuit

shouldbeapproximately12°C,irrespectiveofhowmany

compressorsareinoperation.Innormaloperation,the

setpointofthewatertothechilledbeamcircuitis15°Cas

standard.

Setpoint offset (risk of condensation)

Thecompressorsarecontrolledbythewatertemperature

downstreamoftheevaporators.Thetemperatureinthe

maincircuitmustbeapproximately6°C,otherwisethere

isariskthattheadjustmentwillbeincorrect.

Insetpointoffsetoperationthesetpointofthewaterto

thechilledbeamcircuitis17°Casstandard.

Outdoor air

Chilled beam

circuit

Buffer tank

Combi Cooler delivery boundary

Supply air

XAB

Fläkt Woods 8760 GB 2009.12 9 Subject to alteration.

EU Air Handling Unit INSTALLATION AND MAINTENANCE INSTRUCTIONS

EUKN Combi Cooler

Screens on the PLC

* (--.-) No value is displayed if the temperature sensor from the chilled

beam circuit is connected to the BMS, i.e. when the BMS is

controlling the chilled beam circuit instead of the Cooler/PLC.

Display message Explanation

* 3-Fase Alarm * Alarm from the phase break relay, phase

sequence fault relay

* Low Water Flow * Water ﬂow in the brine circuit too low.

* Cooler stopped *

(Interlocked)

Cooler and CP1 interlocked by the fan/

outdoor temperature sensor.*

* Start up delay *

Wait (s) 120

Start delay 2 minutes so the unit damper

has time to open.

1=Alarm Q1 / Term. KM1’s Motor protection or Thermistor

has tripped.

2=Alarm Q2 / Term. KM2’s Motor protection or Thermistor

has tripped.

1=Alarm HP push ESC KM1’s High pressure switch 1 has tripped.

2=Alarm HP push ESC KM2’s High pressure switch 2 has tripped.

1=Alarm Low press. KM1’s Low pressure switch has tripped.

2=Alarm Low Press. KM2’s Low pressure switch has tripped.

1=WaterTemp Alarm Ouput Temp. circuit 1 is less than 3°C.

Reset the alarm relay

2=WaterTemp Alarm Ouput Temp. circuit 2 is less than 3°C.

Reset the alarm relay

1=WatTemp Stop 300 KM1 stopped for 5 min. if the temp. in

circuit 1 is less than 4°C.

2=WatTemp Stop 300 KM2 stopped for 5 min. if the temp. in

circuit 2 is less than 4°C.

1=Capacity Alarm KM1’s Capacity switch has tripped. Alarm

locked for 1 min.

2=Capacity Alarm KM2’s Capacity switch has tripped.

1=Capac. Stop :600 KM1 stopped for 10 min.

2=Capac. Stop :600 KM2 stopped for 10 min.

1=Blocked (s) :180 Stage 1 blocked for 3 mins. during down

regulation from stage 3.

2=Blocked (s) :180 Stage 2 blocked for 3 mins. during down

regulation from stage 3.

1=Wait (s) :300 Start delay of stage 1 for 5 min.

2=Wait (s) :300 Start delay of stage 2 for 5 min.

3=Wait (s) :300 Start delay of stage 3 for 5 min.

1=Run KM1 in operation.

2=Run KM2 in operation.

* An external start signal to the cooling unit also starts/stops CP1.

When stopping, the pump runs for a further 2 minutes before it

stops. The pump is also exercised daily between 12:00-12:02.

Operational and Alarm Information

Screen 1

The screen displays operational and

alarm information (also see the sepa-

rate description of screen 1).

CoolWater In 18.0 Input water temperature (return

temp.)

1=Wait (s) 300 For example KM1 has a 5 min. start

delay. (The time is counted down)

2=Run For example KM2 is in operation.

Screen 2

Normal running/

Condense sensor= ON

Displays the applicable setpoint. See

screens 4 and 5.

Coolwater Out1 8.0 Output water temperature from coo-

ling circuit 1.

Coolwater Out2 8.1 Output water temperature from coo-

ling circuit 2.

Screen 3

BeamWater In 15.2 (--.-)* Input water temperature to the chil-

led beam circuit.

Valve signal % 085 (---) Control signal to the chilled beam

valve 0–100% = 0–10V.

(Forced closing)

The text is displayed in the event

of the forced closure of the chilled

beam valve.

Screen 4

Setpoints when

Normal running

The setpoints applicable during

normal operation, i.e. when the con-

densation sensor in the room is not

generating an alarm (=OFF).

CoolWater In 18.0 Input brine temperature setpoint

(return temp.)

BeamWater In 15.0 (--.-) Input water temperature setpoint to

the chilled beam circuit.

Screen 5

Setpoints when

Condense sensor= ON

The setpoints applicable when there

is a risk of condensation, i.e. when

the condensation sensor in the room

is generating an alarm (=ON).

CoolWater In 10.0 Input brine temperature setpoint

(return temp.)

BeamWater In 17.0 (--.-) Input water temperature setpoint to

the chilled beam circuit.

Screen 6

Run Time (h) Total run time for each compressor.

KM1 Total= 00048 For example KM1 has been in opera-

tion for 48 hours.

KM2 Total= 00025 For example KM2 has been in opera-

tion for 25 hours.

(Step 3)= 00012 KM1 and KM2. Joint operation 12 h.

Screen 7

Time: 11.25

Current time. Must be set if CP1 is

to be exercised at the desired time

(12:00).

CombiCoolerProgram

2KM: V1.03 Program version

Date : 090202 Program release

Fläkt Woods 8760 GB 2009.12 10 Subject to alteration.

EU Air Handling Unit INSTALLATION AND MAINTENANCE INSTRUCTIONS

EUKN Combi Cooler

Maintenance

(Mustbecarriedoutbyarefrigerationservicecompany

orcorrespondingundertakingatleastonceayear).

Checkthefollowing:

1. Evaporation/condensationtemperature.Leakage

inspection(every12months)inaccordancewithEU

requirements.

2. Hotvapourtemperature.

3. Expansionvalve(superheatingofsuctionvapour).

4. Safetyequipment(pressureswitchtripfunction).

5. Coolingcapacity.

6. Automationandcontrolequipment(functionalin-

spection)

7. Electricalequipment(post-tighteningpowerconnection).

8. Cleaning(batteries,driptrays,drains).

9. Outletlters.

Water circuit

10.Cleanlinessandeffectivenessofallplateheatex-

changers(evaporators,incoming).

11.Filter.

12.Pipeconnectorsandwelds.

13.Pipeinsulation.

14.Thetemperaturedifferentialacrosstheheatexchang-

ersischeckedviathecontrolunit.Carriedoutto

checkcleanliness/performanceacrosstheexchanger.

In-service inspection

Inspectionsmusttakeplaceatleastonceayearandbe

registeredinaccordancewithEUregulationsonuori-

natedgreenhousegases842/2006,Article3.

Checkthefollowing:

1. Pipes

2. Leaktracetherefrigerantsystem

3. Vibrationtest

4. Corrosioninspection

5. Refrigerantlling

6. Oilleakage

7. Safetyequipment

8. Joints/seals

Removal

Whenremoving,(scrapping)thistypeofunitallrefriger-

antandcompressoroilmustalwaysbetakenfordestruc-

tion/recovery.

Troubleshooting

NOTE!Faultsmustalwaysberemediedwithoutdelay.

Theservice/maintenanceofcoolingandwatersystemsmay

onlybecarriedoutbyauthorisedcompaniesusingcertied

personnelinaccordancewithEuropeanUnionRegulation

303/2008andthenecessaryprotectiveequipment.

Operation and maintenance

Description

– Thecoolingunitispartoftheairhandlingunitandis

installedasaunitmodule.

– Thecoolingunitoperatesindependentlyandhasits

owncontrolcabinet.Startsignalsareprovidedbythe

airhandlingunit.

– Thecoolingunitisintendedtocoolsupplyairinthe

temperaturerange+20°C-+32°C.Loweringthetem-

peratureofthebrineby5–7°Cispossibledepending

ontheselectedairtemperature,supplyair/extractair

ratioandoperationalcase.

Operation

Thecoolingunit’sservicecomponenthasanelectrical

apparatuscabinetgenerallycontainingthefollowing

equipment:

– Maincircuitbreaker

– Controlcircuitfuse

– Motorcircuitbreaker

– Onefrostprotectionsensorforeachcircuit

– Controlunitwithdisplay

Theservicecomponentalsocontainssectionsofthe

pipingthatdistributesthebrine(thecoldwater)tothe

supplyaircoilandchilledbeamcircuit.Theillustration

belowshowsthecomponentsintheservicecompart-

ment,thecomponentsincludedinthedelivery,andthe

componentsrequiredtoallowtheentirecoolingunitto

beutilisedfully.

Inspection

(Carriedoutbytheowner/useronceaweek)

Check(look/listenfor)thefollowing:

1. Alarmindications

2. Abnormalnoise/vibrations

3. Fluidleakage(oil,water)

4. Corrosion,wear

5. Mountings,brackets

6. Unitcompartment,lighting

IMPORTANT!Alwaysstudythesafetyinstruc-

tionsonPage1priortocarryingoutanywork.

FläktGroup EUKN Combi Cooler Installation guide

Brand: FläktGroup

Model: EUKN Combi Cooler

Category: Split-system air conditioners

Type: Installation guide

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FläktGroup EUKN Combi Cooler Installation guide

FläktGroup EUKN Combi Cooler Installation guide

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