CGC SpaceKeeper SKH008 Owner's manual

July7th,2010
Installation
Operation
Maintenance
HybridHorizontal
HeatPump
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Spacekeeper
Models:SKH008–SKH060
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July7th,2010
TableofContents
1.INFORMATION.................................................................................................................................1
Handling/Storage..........................................................................................................................................1
Weight/Dimension/Clearances.....................................................................................................................2
2.INSTALLATION..................................................................................................................................3
GeneralInstallChecklist................................................................................................................................5
Location/Placement/Piping..........................................................................................................................6
CondensateDrainConnection......................................................................................................................7
Wiring............................................................................................................................................................8
3.OPERATION......................................................................................................................................9
BoardDescription.......................................................................................................................................10
Fan...............................................................................................................................................................11
HeatOperation...........................................................................................................................................11
CoolStartUp...............................................................................................................................................11
CoolOperation............................................................................................................................................12
OperationalAlgorithm................................................................................................................................14
ThermostatConnection..............................................................................................................................14
ShutdownOutput........................................................................................................................................15
FaultAlarmOutput.....................................................................................................................................15
4.COMMISSION&STARTUP.............................................................................................................17
5.MAINTENANCE...............................................................................................................................20
SKH008‐SKH018WiringDiagram..............................................................................................................21
SKH020‐SKH060WiringDiagram..............................................................................................................22
6.APPENDIXA(DETAILS)...................................................................................................................23
SKH008‐SKH018.........................................................................................................................................24
SKH020‐SKH036.........................................................................................................................................25
SKH042‐SKH060.........................................................................................................................................26

HybridHorizontalSpacekeeper–InstallationOperationMaintenanceManual


INFORMATION
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R090303InstallationOperationMaintenanceManualissubjecttochangewithoutnoticePage1
Handling
Caremustbetakeninhandlingthehorizontalunitandotheraccessoriestoensurethatthis
equipmentdoesnotsustainanydamage.

Theprotectiveshippingpackagingshouldremainontheunituntilitisreadyforinstallation.
Duringconstruction,theunitmustnotberunandshallbeshelteredfromcontaminantsand
debrissuchasdrywalldust,woodchips,andpaintthatcoulddamagethefanorblockthe
cooling/heatingcoilwhichmayresultindiminishedperformance.

Storage

Theunitmustbestoredinanuprightpositionatalltimes.
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Failuretomaintaintheunitinanuprightpositionmayresultinpermanentdamagetotheunit.
Droppingthechassisorexposingittoextremeshockorvibrationmayalsoresultinpermanent
damagetotheinteriorcomponentsandpiping.

Theunitshouldbestoredinanon‐corrosiveenvironmentshelteredfromconditionsofextreme
temperatureorhumidity.Subjectingtheunittoconditionsofthisnaturemayresultin
significantlyreducedperformance,reliability,andoperationallife.

Theunitisintendedforinterioruseonlyandshouldbestoredindoorsatalltimestoprotectit
fromtheelementsandtohelpeliminatethepotentialgrowthofindoorairquality(IAQ)
contaminants.
Ifindoorstorageisnotpossible,theequipmentmaybestoredoutdoorsduringthesummer
monthsonly,ifthefollowingprovisionsaremet:
1. Theequipmentmustbeplacedonadrysurface,orraisedoffthegroundinamanner
whichallowsforair‐circulationbeneaththeunit.
2. Awaterprooftarpmustbeusedtocovertheequipmentinordertoprovideprotection
fromtheelements.
3. Continuousventilationtotheunitsmustbeprovidedtohelppreventmoisture
accumulationontheinteriorandexteriorsurfaces.Moisturebuildupon,orwithinthe
unit’sinsulationmayresultinmicrobialgrowththatcanleadtoodorsandserious
health‐relatedIAQproblems.
4. Theunitsmustbestoredintheiroriginalpackaging.
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HybridHorizontalSpacekeeper–InstallationOperationMaintenanceManual
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
INFORMATION
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R090303InstallationOperationMaintenanceManualissubjecttochangewithoutnoticePage2
5. Theindividualunitsshallnotbestackedontopofoneanother.
6. Iftheunitwaspreviouslyinuse,ensurethatallwaterinthecoilhasbeenblownoutand
thatallhoseconnectionsarepluggedduringstorage.
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Weight/Dimensions/Clearances
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Weight:

Model008010012015018020024030036042048060
Weight
(lb)130130135150160205235235235375300375
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UnitDimensions:
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SeeAppendixA‐Details
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UnitClearances:
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SeeAppendixA‐Details
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HybridHorizontalSpacekeeper–InstallationOperationMaintenanceManual
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INSTALLATION
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R090303InstallationOperationMaintenanceManualissubjecttochangewithoutnoticePage3
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HybridHorizontalSpacekeeper–InstallationOperationMaintenanceManual
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INSTALLATION
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TheInstallationofHybridHorizontalSpaceKeeperunitsandaccessoriesmustbeinaccordance
withlocalcodesandallregulationsofallrelevantgoverningauthoritieshavingjurisdiction.The
followinginstallationproceduresarerecommendedbytheManufacturer.Itisthe
responsibilityoftheinstallingcontractortocomplywithallapplicablecodesandregulations.
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HybridHorizontalSpacekeeper–InstallationOperationMaintenanceManual
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INSTALLATION
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LEFTRETURN
AIRFILTER
ARR.3BACK
SUPPLYAIRARR.1RIGHT
SUPPLYAIR
COMPRESSORAND
CONTROLACCESS
PANEL
DELIVERYANDGENERALINSTALLATIONCHECKLIST

ThelistbelowsummarizesthestepsrequiredtosuccessfullyinstallaCGCHorizontal
SpaceKeeperunit.
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1. Removepackagingandinspecttheunit.Checkforshippingdamageormaterial
shortage;fileafreightclaimandnotifyyoursalesrepresentativeifdamageordeficiency
isfound.
2. Verifythemodel.
3. Verifythatthepowersupplycomplieswiththenameplatespecification.
4. Connectproperlysizedandprotectedpowersupplywiringtothedisconnect(not
supplied).
5. Installpropergroundingwirestoanearthground.
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Figure1
FRONT

HybridHorizontalSpacekeeper–InstallationOperationMaintenanceManual
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INSTALLATION
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LOCATION
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1. Determinefuturehorizontalmount
locationwithclearancesshownin
appendixA.
2. Locatetheunitinanindoorarea.Theair
temperaturesurroundingandbeing
suppliedtotheunitmustbeabove45°F
(7°C)atalltimes.Donotlocatetheunitin
areassubjecttofreezing.
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PLACEMENT

1. Positiontheunitandfastentoceiling
ensuringtheunitisleveled.Extension
Rods(notsuppliedbyCGC)andRubber
isolatorsaretobeused.DONOTblock
accesspanelswithmountingrods.
2. Meetspecifiedclearancestoprovide
roomforremovalofallaccesspanels.
3. Provideaccesstowatervalvesand
fittings,aswellasscrewdriveraccessto
theunitsidepanels,dischargeaircollar,
andallelectricalconnections.

PIPING

CAUTION:Pipingmustcomplywithallapplicable
codesandregulations.
1. Installisolationvalvesateachunittopermit
unitremovalforservicing.
2. DONOTbendorkinksupplylinesorhoses(If
supplied).Supplyandreturnhosesarefitted
withswiveljointfittingsatoneendtoallow
removalforfutureservicing.
Figure2

HybridHorizontalSpacekeeper–InstallationOperationMaintenanceManual
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INSTALLATION
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HybridHorizontalSpacekeeper–InstallationOperationMaintenanceManual
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INSTALLATION
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NOTE:Insulationofthewaterpipingloopisnotrequiredexceptwherepipingrunsthrough
unheatedareasorareasontheexteriorofthebuilding.Thenormalloopoperating
temperaturerangeis85°F(29°C)to120°F(49°C).

WIRING

1. Wireroomtemperaturesensortoelectricalpanelasindicatedonthewiringdiagram.
2. Connectpower.

HybridHorizontalSpacekeeper–InstallationOperationMaintenanceManual

OPERATION
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R090303InstallationOperationMaintenanceManualissubjecttochangewithoutnoticePage9
CAUTION:
Toavoidfouledmachinery,extensiveunitcleanup,andvoidwarranty,donotoperateunits
withoutairfiltersinplace,anddonotoperateunitsduringtheconstructionprocess.


TheCGCGroupHybridHeatPumpprovidesyearroundcoolingandheatingascontrolledbythe
unitthermostatorbyadirectdigitalcontroller.

TheCGCGrouphybridheatpumpprovidescoolingwithawater‐cooledrefrigerationcircuit,
andprovidesheatingusingahydroniccoil.Thecompressoroperatesinthecoolingmodeonly
andshutsdownduringtheheatingmodeprovidingforquieteroperation,extendedcompressor
life,andareductioninenergyconsumption.

Toensurecorrectoperation,centralizedequipmentlocatedwithinthebuildingmechanical
roomisautomaticallycontrolledtoprovideeachheatpumpunitwithwaterthatisatthe
appropriatetemperature.


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HybridHorizontalSpacekeeper–InstallationOperationMaintenanceManual
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OPERATION
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Theunitcircuitboardincorporatessixrelayoutputswiththefollowingfunctions:
•K1–Auxiliaryrelayforcoolingvalveonatwo‐valveunitorheatvalveonadehumidification
unit.
•K2–HeatingRelay
•K3–AlarmRelay
•K4–CompressorRelay
•K5–LowFanorFanRelayforbeltdriveunits
•K6–HighFanorCompressor#2onbeltdriveunits
Eachoftheserelayshave,inparallel,agreenLEDindicatorthatlightsupwhentherelayis
energized.
Thecircuitboardincorporatesdigitalinputsthatareopto‐coupledtoa24VACsource.Thesehave
amberLEDindicatorslocatedneartheinputlocationswhicharelitwhentheinputisclosed.The
inputsinclude:
•HighPressureSwitch
•LowPressureSwitch
•HeatCall(Wonthermostatterminal)
•CoolCall(Yonthermostatterminal)
•FanCall(Gonthermostatterminal)
•Auxiliary(Aonthermostatterminal)
•Compressorshutdown(24VACsignalthruO/O).Providingacontinuous24Vpotentialto
O/Owillterminateandpreventcompressoroperation.Thiscanbeusedforduty‐cycling,
minimizingpowerconsumptionduringanemergencypowerperiodorduringsufficiently
lowoutdoorairtemperatureswhichallowforfreecooling–allwhilemaintainingthe
heatingfunction.
•Unitshutdown(24VACsignalthruA/O).Providingacontinuous24VACpotentialtoA/Owill
terminateandpreventunitoperation.Thiscanbeusedforanightshutdown.Onboth
arrangementsasingle24VACsignalcanshutdownmanyunits.¼VAisrequiredperunit.
Finally,theboardhasfouranaloginputsprovidedviathermistors.Theseinputsareasfollows:
•Ta–DischargeAirTemperature
•Tr–RefrigerantTemperature
•Tw–OutgoingWaterTemperature
•Co–CondensateLevel
Ta,Tr,AndTware10kOhmNTPthermistors,whileCoisa100OhmNPTthermistor.These
InputsdonothaveLEDindicators.

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FAN
1. Acallon“G”forfanonthethermostatterminalstripwillcausethefantooperate
continuouslyonlowfanspeedthroughK5onmultispeedunits.
2. Acallon“W”forheatonthethermostatterminalstripwillalsocausethefantooperate
onlowspeed.Iftheheatingcallisstillpresentaftera10minuteperiod,themultispeed
unitswillswitchthefantohighspeedthroughRelayK6.
3. Acallon“Y”forcoolingonthethermostatterminalstripwillcausethefanonmulti‐
speedunitstoimmediatelystepuptohighspeedthroughRelayK6.
4. Fanoperationwillterminatewheneverallcallsaredropped.
5. Whenthefanisoperatingathighspeed,bothrelaysareenergizedalongwiththeir
associatedLEDindicators.

HEATINGOPERATION

1. Acallon“W”forheatwillactivatethefanatlowspeed.Itwillalsosimultaneously
energizetheheatrelayK2anditsassociatedLED.TherelayK2willprovide24VACfused
powerdirectlytotheheatvalve.
COOLSTARTUP

1. Acallon“Y”forcoolinginitiatesaseriesofcheckspriortothestartupofthe
compressor.Thesechecksinclude:
a. PowerONtimer–Compressoroperationisdelayedforapproximately5minutes
afterrestorationofpower.Thispreventsallunitsfromcomingonlineatthe
sametimewhenpowerisrestored.Italsopreventscompressorjoltingwith
intermittentpower.
b. Anti‐Recycletimer–Thereisa5‐minuteanti‐recycledelaytimerthatallowsthe
refrigerationcycletoachievepressureequalizationsothatthecompressoris
unloadeduponstartup.
c. HighPressureSwitch–Thehighrefrigerantpressureswitchmustbeclosedprior
tostart.LED11willbeON.
d. LowPressureSwitch–Thelowpressureswitchoperatesprimarilyasalossof
chargeprotector.ItmustbeclosedforcompressorstartupanditsLED12willbe
ON.Thepressureswitchhasa5minutetimeignoresubsequenttostart‐up.In
somesituations,particularlywhentheunitiscold,thepressureswitchwillopen

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duringstart‐up.Iftheswitchdoesnotremakewiththe5minuteignoreperiod,
thecompressorwillimmediatelybestopped.
e. AirtemperaturesensorTa–SensorTawillpreventcompressoroperationifthe
airflowingthroughtheunitisbelow60°F(15°C).
f. WatertemperaturesensorTw–SensorTwwillpreventcompressoroperationif
theoutgoingfluidtemperatureisabove140°F(60°C).
g. RefrigeranttemperaturesensorTr–SensorTrwillpreventcompressor
operationifthecoiltemperatureisbelow35°F(2°C).
h. AnyoftheabovefaultswillbeindicatedwiththeDiagnosticCodedescribed
undertheDIAGNOSTICSsection.

COOLOPERATION

1. Monitoringoftherefrigerantcyclecontinuesduringoperationofthecompressor.The
followingmalfunctionswillcausethecompressortoshutdown:
a. Iftheheadpressureexceedsthesetpointofthehighpressureswitch,theswitch
willopenandthecontrolboardwillterminatethecompressoroperationwithin
10seconds.Atthistimeaflashcodeof6willbeinitiatedonthereddiagnostic
LED15.Compressoroperationwillberestoredinaccordancewiththe
“Intelligentreset”algorithm.
b. Ifthesuctionpressuredropsbelowthesetpointofthelowpressureswitch,the
switchwillopenandifitremainsopenbeyondthe5minuteignoreperiodafter
startup,compressoroperationwillbeterminatedwithin10seconds.
Compressoroperationwillberestoredinaccordancewiththe“IntelligentReset”
algorithm.Aflashcodeof5onthereddiagnosticLEDwillbeinitiatedatthis
time.
c. IntelligentResetAlgorithm–Ifaloworhighpressureswitchopensandremains
openformorethan10minutes,ahardlockoutwillbeinitiatedandthecooling
modewillbelockedoffuntilthecontrolsaremanuallyreset.Atthesametime
thefaultrelayK3willbesettoalarm;however,iftheopenswitchcloseswithin
10minutesarestartcycleisinitiated.Therestartcyclebeginswitha10minute
delayafterwhichifthereisacoolcallinplaceandallotherenablersarewithin
thestartparameters,thecompressorwillagainbeputintooperation.Should
eitherofthepressureswitchesopenagain,theshutdownprocedurewillcycle
again,followedbyarestart.Theintelligentresetwillallowtwoopenswitch
shutdownsandrestartsina24hourperiodandathirdshutdownwithin24
hourswillputtherefrigerationsystemintoafullandhardlockout,requiringa

HybridHorizontalSpacekeeper–InstallationOperationMaintenanceManual
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powerdowntoreset.Iftwoorlessswitchopenshutdownsoccurwithina24
hourperiod,theywillbeerasedfrommemoryandwillnotcontributetoafuture
hardlockout.(Ahardlockoutwillpreventcompressoroperationuntilthe
controlsarepowereddownforatleast20seconds,andthegreenpowerlight
goesout.Asoftlockoutisacompressorshutdownthatwillberestoredoncethe
conditioncausingtheshutdownreturnstonormal.)
d. Duringcompressoroperation,refrigeranttemperature,systemfluid
temperatureanddischargeairtemperaturearecontinuouslymonitored.Ifthe
refrigeranttemperaturedropsbelow35°F,compressoroperationwillbe
disabled.After10minutesanautoresetoccursandthecompressorwillbe
enabledassoonasthetemperaturerisesabove60°F.Actualcompressorrestart
willbedelayedaminimumof5minutesbytheanti‐recycletimer.Aflashcodeof
2willbeinitiateduponalowrefrigeranttemperatureshutdown.
e. Iftheoutgoingsystemfluidtemperaturerisesabove140°F,compressorstartup
willbedisabled.After10minutesanautoresetoccursandthecompressorwill
beenabledassoonasthetemperaturedropsbelow115°F.Theoutgoingsystem
fluidsensorismountedontheleavingfluidpipe.Actualcompressorrestartwill
bedelayedaminimumof5minutesbytheanti‐recycletimer.Aflashcodeof3
willbeinitiateduponahighoutgoingsystemfluidtemperatureshutdown.
f. Ifthedischargeairtemperaturedropsbelow50°F,compressoroperationwillbe
disabled.After10minutesanautoresetoccursandthecompressorwillbe
enabledassoonasthetemperaturerisesabove60°F.Thedischargeair
temperaturesensorismountedonthefanhousing.Actualcompressorrestart
willbedelayedaminimumof5minutesbytheanti‐recycletimer.Aflashcodeof
4willbeinitiateduponalowdischargeairtemperatureshutdown.
g. Thecondensatelevelsensorisa100ohmthermistorthatisheatedfor15
secondsevery4minutes.Itstemperatureismeasuredatthebeginningofthe
heatcycle,andagainattheendoftheheatingcycle.Ifthecondensatelevelrises
abovethesensoritwillnotwarmupduringthewarmupcycle,andthe
temperaturechangewillbeinsignificant.Itisthislackoftemperaturechange
thatthecontrollerseesasanimpendingcondensateoverflow.Whenhigh
condensatelevelisdetected,compressoroperationisimmediatelyterminated,
andatthesametimethefanisstoppedfor30seconds,andthenrestarted.At
thistimeaflashcodeof7willbeinitiated.The4minutecyclewillcontinueuntil
thecoolingcallisnolongerinplace.Ifthecondensateleveldropsbelowthe
sensor,compressoroperationwillbereturnedtonormal.However,ifthe
condensatelevelstaysabovethesensorformorethan15minutes,thefault

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alarmwillbetriggered.Thisfaultsignalwillautomaticallyresetoncethe
condensatelevelgoesbelowthesensor.

Note:Thelastflashcodewillbemaintainedinmemoryfor1weekoruntiltheunitcontrolsare
powereddown.Theflashcodewillcontinueuntiltheproblemhasclearedandthecompressorhas
beenputintooperation.Ifacoolingcallisinplace,itmustbedisengagedbeforethecauseofthe
lastalarmshutdowncanbeidentified.

OPERATIONALGORITHM

Thereareseveralcontrolalgorithmstopreventcyclingandproblematicoperation.Theseare:
1. DoubleCall–Ifthermostatconnectionsorsetupisincorrectresultinginasimultaneous
callforbothheatingandcooling,theunitwillnotoperate.Thisconditioncanbe
observedonthethermostatconnectionLEDs.(Note:Aheatpumpthermostatwill
presentthisscenario)
2. ReverseCycleCall–Poorlylocatedautomaticchangeoverthermostats(ie.thermostats
mountedonawalloppositeadischargegrill,orathermostatinadoorwaytooutside)
cantriggerheatingandcoolingmodechangesmanytimesanhour.TheCGCcontroller
hasa10‐minuteanti‐modechangetimerforbothheatingandcoolingmodechanges.
Thecontrollerwillnotacceptachangeinmodeuntil10minuteshaveelapsedsince
terminationoftheoppositecall.

THERMOSTATCONNECTIONS

TheCGCcontrolboardhasbeendesignedtooperatewithmoststandard24VACthermostats.
ThesearepoweredfromtheCGCboardwith24VACandsimplyswitchpowerONtoeachofthe
Heat(W),Cool(Y),Fan(G)orAux(A).Whilemostpresentdaythermostatsoperateinthismanner
thereareothersthatmayormaynotworkproperly.Thefollowingshouldbecheckedoutfor
satisfactoryperformancepriortoinstallation:
1. HeatPumpThermostat–Someheatpumpunitsdonothaveheatrelays(thereforeare
notcompatiblewithstandardthermostats)andrequire“HeatPumpThermostats”.
Thesethermostatscallforbothheatingandcoolingononeofthesignalwires.These
thermostatsarecompletelyincompatiblewithCGC’scontroller.
2. Mercurybulbthermostat‐Thistypeisproblematicbutcanbeused.Unfortunately,the
anticipatorsareaproblem.Heatanticipatorsmustbeinserieswithahighcurrentrelay
orvalvetofunction,sodonotperformonanelectroniccircuit.Thiswillresultinlarger

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thannormaltemperatureswings.Thecoolanticipator,ifoversized,canbleedenough
currenttoindicateacoolingcallevenafterithasbeenterminated.
3. Batterypoweredthermostats–Thesethermostatsweredevelopedasreplacementsfor
oldmercurybulbthermostatsthathad4wireconnectionswhile24Velectronic
thermostatsrequired5wires.ThesewillworkwithaCGCboard,althoughCGCdoesnot
recommendthem.Theyrequireperiodicbatteryreplacement,whichissomethingthat
shouldbeavoidedifpossible.
4. Powerstealingthermostats–Thistypeofthermostatiselectronicandwasalso
developedasareplacementforoldmercurybulbthermostats.Thesetooare
problematicinthattheybleedasmallamountofcurrentdownthesignalwiresandthis
maybeinterpretedasasignalforheatorcool.
5. Triacswitchedcontrollers–Thisisacommonlyusedswitchingdeviceandallcontrollers
testedtodatehavefunctionedflawlessly.CGCrecommendsthatpriortoinstallationof
athirdpartysuppliedcontroller,itbecheckedforcompatibility.CGCcanconfirmthis.
6. Relayswitchedcontrollers–ThistypeofcontrollerworkswellwithCGCdevices.

SHUTDOWNOUTPUT

TheCGCboardhasanoptionalinputterminalstripthatallowsfortwotypesofremoteshutdown.
Thesearea)compressorshutdownandb)unitshutdown.
Theadvantageoftheseinputsisthatmanyunitscanbeconnectedinparallelandwhenpowered
byanindependent24VACsignaloneorbothoftheseactionscanbeimplemented.Commonuses
are:
a. Dutycyclingfordemandcontrol
b. Globalnightsetback
c. Heatingonlymodeduringemergencypowerperiods

TheCGCcontrollerisalsosetupsotheseshutdownfunctionscanbeinitiatedindividuallywithon
board24Vpower.Thiscapabilityallowsunitorcompressorshutdownbasedonadoorswitch,a
lightswitch,oroccupancyswitch.Aseparate24Vpowersupplyisrequirediftwoormoreunitsare
beingshutdown.

FAULTALARMOUTPUT

TheCGCboardisprovidedwithafaultalarmindicationandoutput.Thefaultalarmrelay
providesnormallyopenandnormallyclosedcontactsforuseintransmittingfaultconditions.
NOTE:ThefaultalarmisenergizedforNORMAL,andde‐energizedforfault.Assuch,iftheunit

HybridHorizontalSpacekeeper–InstallationOperationMaintenanceManual
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OPERATION
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R090303InstallationOperationMaintenanceManualissubjecttochangewithoutnoticePage16
isnotpowered,iftheboardfuseisblown,oriftheelectronicsaredamaged,afaultcondition
willbeindicated.

ThefaultrelayisparalleledwiththeFaultLEDwhichwillbeONwhennofaultconditionexists.
Otherfaultconditionsare:
d. Hardlockoutduetohighorlowpressureswitchbeingopenfor10minutesorlonger.
e. Hardlockoutduetothreehighorlowpressureshutdownsina24hourperiod.
f. Highlevelcondensateforaperiodinexcessof15minutes.


HybridHorizontalSpackeeper–InstallationOperationMaintenanceManual
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COMMISSION&STARTUP
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R090303InstallationOperationMaintenanceManualissubjecttochangewithoutnoticePage17
SystemFlushing:
Propersystemcleaningandflushingisanimportantaspectofthecommissioningandstartup
procedureforhybridunits.Ensurethesystemhasbeenflushedproperly.Thispreventsfouling
oftheunit’sheatexchangers.

NOTE:Hydroniccoilsarenot100%drainable.

SystemFluid:
Ensurethatsystemwatertemperatureiswithinanacceptablerangetofacilitatestart‐up(80‐
120°F)forcoolingand(100–140°F)forheating.

SystemWaterpH:
SystemwatershouldhaveaneutralpHbalanceofapproximately7.5whichwillextendthelife
ofthehoses,heatexchangers,andotherwatersideaccessories.

WaterFlowRate:
Openallisolationvalvestotheunit.Ensurethattheenteringandleavingfluidtemperaturesof
thehybridunitinoperationareacceptable.Thereistypicallyan8to12degreedroporrisein
temperature,dependingonwhethertheunitisincoolingorheating.Underextreme
conditions,slightvariancesinthetemperaturemaybenoted.

FreezeProtectionfromWaterSystem:
Ensurethatfreezeprotectionisprovidedfortheoutdoorportionoftheloopwatersystem.
Inadequatefreezeprotectioncanleadtocoildamage.

NOTE:Apotentialissuemayariseduringconstructionwherethesystemfluidloopisdrained
afterbeingcleaned,flushedandtested.Hybridverticalstackunitswillnotcompletelydrain
andmayholdfluidinthecondenserorheatingcoil.Extensivedamagemayresulttointernal
componentsifthesystemfluidfreezesunlessadequateglycolisadded.

RemoveAirfromSystemFluidLoop:
Airinthesystemimpairsunitoperationandcancauseerosioninthesystempiping.

HybridHorizontalSpackeeper–InstallationOperationMaintenanceManual
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COMMISSION&STARTUP
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CleanUnitFilters:
Confirmthattheunitfiltersthatarebeingusedareclean.Thiscontributestotheproper
operationoftheunitbyensuringthatthereisadequateairflowacrossthecoil.

SAFETYNOTE:
Inthefollowingpartoftheprocedureitwillbenecessarytoaccesstheareasaroundthe
electricalwiringandthecircuitboard.Donotadjustorremoveanyboardconnectionsorwiring
connectionstoothercomponentswithoutfirstpoweringdowntheunit.OnolderSKH008to
018,thedisconnectwillbeapowerplugatareceptacle.Onmodelsizes20andpostOct7/2005
SKH008to018uptherewillbeaswitchdisconnect.Disconnectsareusuallywithinreachofthe
unit.Exercisecautionatalltimes.

VerifyFanRotation&CompressorOperation(3‐Phase):
WiththepowerOFF,removethefrontpanelandtheelectricalpanelcover.Removeany
thermostatblockandturnpowerONtotheunitwiththeelectricaldisconnect.
Ensurethatthecorrectstandbyprotocolisinplace‐thefollowingboardlightswillcomeonin
standby:Power,HP,LP,andAlarm.

Inspectthefansectiontoensurethatitisclearofanydebrisandthatthefanrotatesfreely.
CGC’sHorizontalSpacekeeperunitscomeequippedwitha3‐phasefanandcompressorthatare
matchedtoeachotheraswellastheotherinternalcomponents.Althoughinternalconnections
tothefanandcompressoraremadeatthefactory,variancesinpowersupplyinthefieldwill
requirethatbothcomponentsbetestedforcorrectoperation.Theprocedureisoutlined
below:
•Usingascrewdriverwithaninsulatedhandle,pushandholdinthemanualplastic
buttonofthefancontactorforafewseconds,makingsurenottotouchanyofthe
metalparts.Thiswillcausethefantorotate.
•Thecorrectrotationwillhavethefanvanesrotatingtowardsthehousingexit.
•Iftherotationisincorrect,powerOFFtheunitandswitchtwoofthethreewiresatthe
bottomofthecontactorthatfeedthefan.PowerONtheunitandagainusingthe
screwdriver,pressthecontactorforafewsecondstoactivatethefan.Therotation
shouldnowbereversed.



