FläktGroup EUKN Combi Cooler Installation guide

FläktGroup
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
L
L
L
L
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
21
1 596
2 645
3 648
22
1 722
2 730
3 741
31
1 902
2 959
3 1015
32
1 1097
2 1097
3 1117
33
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.
65
63
64
51
52
53
54
55
56
57
58
59
60
61
62
66
67
68
L2
L1
L3
N
PE
L2
L1
L3
N
PE
Power supply
3 x 400 AC
1
2
1
2
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
1
2
1
2
3 3
1
2
1
2
1
2
1
2
1
0 4 min
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
External
Combi Cooler
BMS/Unit
Room conden-
sation sensor
Chilled beam water
temperature sensor
Chilled beam water
valve actuator
1
G
G0
G
G0
Y
G
G0
Y
Q11
Q12
2
3
4
1
2
3
1
2
3
1
2
3
4
1
2
3
1
2
3
24 V AC
Gnd
0 - 10 V DC
24 V AC
Gnd
0 - 10 V DC
0 - 10 V DC
24 V AC
24 V AC
Gnd
Min value
Gnd
C
D1
C
N0
C
N0
C
N0
N0
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
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
3 3
1
2
1
2
1
2
1
2
1
G
G0
G
G0
Y
G
L1
L2
L3
N
PE
G0
Y
G
G0
Y
Q11
Q12
2
165
63
64
51
52
53
54
55
56
57
58
59
60
61
62
66
67
68
69
70
71
72
73
74
2
3
4
3
1
2
1
2
3 3
1
2
1
2
3 3
1
2
1
2
3 3
5 5
4 4
4
Combi CoolerBMS/Unit
External
L1
L2
L3
N
PE
C
N0
C
N0
C
N0
C
N0
N0
C
N0
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,
kg
kW A kW A (A) Circu-
it 1
Circu-
it 2
21
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
22
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
31
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
32
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
33
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
21
1 0.93
2 1.21
3 1.45
22
1 1.31
2 1.54
3 1.82
31
1 1.83
2 2.27
3 2.75
32
1 2.59
2 2.91
3 3.34
33
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
21
1 23
2 30
3 36
22
1 33
2 39
3 46
31
1 46
2 57
1 69
32
1 65
2 72
3 84
33
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
+
ZY
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.
!
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FläktGroup EUKN Combi Cooler Installation guide

FläktGroup
Brand
FläktGroup
Model
EUKN Combi Cooler
Category
Split-system air conditioners
Type
Installation guide
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