Daikin Enfinity VFC Manual

Installation and Maintenance Manual IM 930-6
Group: WSHP
Part Number: 910157591
Date: September 2014
Ennity™ Vertical Water Source Heat Pumps
Model VFC Standard Range & VFW Geothermal
Unit Sizes 009 – 070 / R-410A Refrigerant
People and ideas you can trust.™

Contents
www.DaikinApplied.com 3 EnnityVerticalWaterSourceHeatPumps• IM 930-6
Model Nomenclature ..........................4
Receiving and Storage.........................5
Pre-Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Locating The Unit .............................6
Unit Installation...............................7
Ductwork and Attenuation ......................7
DischargeDucting............................7
ReturnAirDucting ............................7
VentilationAir ...............................8
Cleaning&FlushingWaterSystem...............8
OperatingLimits .............................9
AntifreezeCorrectionFactors ...................9
Piping ....................................10
ElectricalConnections........................11
MicroTech®III Unit Controller ..................12
I/OExpansionModule........................16
MicroTechIIIControllerWithLonWorks®
Communication Module ......................18
MicroTechIIIControllerwithBACnetCommunication
Module ...................................19
Prior To Start-up .............................21
ChangingPSCFanMotorSpeed...............21
Start-up ....................................23
Typical Wiring Diagrams ......................24
MicroTechIIIUnitController(Standalone)–
208/230/460/575/60Hz/3-Phase ................24
MicroTechIIIUnitControllerwithOptionalECM
Motor,DesuperheaterandI/OExpansionModule-
208/230/265/277/60Hz/1-Phase ...............25
MicroTechIIIUnitControllerwithOptionalECMMotor,
Desuperheater,ElectricHeatCoil&I/OExpansion
Module–208/230/460/60Hz/3-Phase ...........26
MicroTechIIIUnitControllerwithOptionalECM
Motor,Desuperheater,andI/OExpansionModule
208/230/460/60/3-Phase......................27
MicroTechIIIUnitControllerwithPSCMotor,
DesuperheaterandI/OExpansionModulefor
HotGasReheatControl(UnitSizes019-070)
208/230/60/1-Phase .........................28
Thermostat Connections ......................29
7-DayProgrammableElectronicThermostat(P/N
668375301) ................................29
Non-ProgrammableElectronicThermostat(P/N
668375401) ................................29
OptionalRemoteSensor(P/N66720401) ........29
MicroTechIIIWall-MountedRoomTemperature
Sensors(KitP/N669529101,669529201,
669529001) ................................30
WiringSensorstotheMicroTechIIIUnitController . 30
Additional Accessories – General ..............31
MotorizedIsolationValve&Relay...............31
PumpRestartRelayKitP/N061419001..........31
MultipleUnitControl(upto3units)
(P/N056794201) ...........................31
HotGas/WaterReheatDehumidication(Option)
(UnitSizes019–070)........................32
Desuperheater(Option)ForVFC/VFW(019-070) ..32
Troubleshooting ............................33
TheinandoutsofR-410A ....................33
Lubrication.................................33
Charging ..................................33
General Maintenance .........................33
MicroTechIIIUnitControllerLEDFaults ..........34
Typical Refrigeration Cycles ...................37
General Use and Information ..................38
WaterSourceHeatPumpEquipmentCheck,Testand
StartForm .................................39

Model noMenClature
Category Code Item Code Option Code Designation & Description
Product Category 01 1 W = WaterSourceHeatPump
Product Identier 02 2-4 VFC = R410A,FloorMounted,StandardRange   
   VFW = R410A,FloorMounted,GeothermalRange  
Design Series (Vintage) 03 5 1=ADesign
2 = BDesign
   3 = CDesign
   4 = DDesign
Nominal Capacity 04 6-8 009 = 9,000BtuhNominalCooling
012 = 12,000BtuhNominalCooling
   015 = 15,000BtuhNominalCooling
019 = 19,000BtuhNominalCooling
   024 = 24,000BtuhNominalCooling
   030 = 30,000BtuhNominalCooling
036 = 36,000BtuhNominalCooling
042 = 42,000BtuhNominalCooling
048 = 48,000BtuhNominalCooling
060 = 60,000BtuhNominalCooling
070 = 70,000BtuhNominalCooling
Controls 05 9 B=MicroTech®IIIUnitController
C= MicroTechIIIUnitControllerw/LonWorks®Communication Module
D=MicroTechIIIUnitControllerw/BACnet®CommunicationModule
F = MicrotechIIIUnitControllerw/BACnetCommModule-WSHPSystem
Voltage 06 10 A=115-60-1(Sizes007-012only)
E = 208-230/60/1
J = 265/277-60-1
F = 208-230/60/3
K = 460/60/3*
   L = 575/60/3
Return Air 08 12 L = Left
 R = Right
Discharge Air 09 13 T =  Top
Blower Motor 10 14-15 04 = ECM
Construction Type 12 18 B = Standardw/2"FilterRack
   C = Standardw/CompressorSoundBlanket
   D = Standardw/CompressorSoundBlanketand2"FilterRack
   F = IndoorAirQuality(IAQ)w/2"FilterRack
   G = IndoorAirQuality(IAQ)w/CompressorSoundBlanket
   H = IndoorAirQuality(IAQ)w/CompressorSoundBlanketand2"FilterRack
Heating Options 14 20 A = 5.0kWElectricHeat
   B = 10.0kWElectricHeat
Dehumidication 15 21-22 AA = HotGasReheatCoil
Desuperheater 19 30-32 DSH = Desuperheater
Refrigerant 20 33 A = R410A     
Cabinet Electrical 22 35-37 75VA = 75VAControlTransformer   
Water Flow Control 23 38 C = 2-WayMotorized1/2"IsolationValve,GeneralClose-OffPressureN.C.
V = 2-WayMotorized1/2"IsolationValve,GeneralClose-OffPressureN.O.
   H = 2-WayMotorized1/2"IsolationValve,HighClose-OffPressureN.C. 
D = 2-WayMotorized3/4"IsolationValve,GeneralClose-OffPressureN.C.
K = 2-WayMotorized3/4"IsolationValve,GeneralClose-OffPressureN.O.
   J = 2-WayMotorized3/4"IsolationValve,HighClose-OffPressureN.C.
Color 24 39 A = AntiqueIvoryPre-Paint     
Y = None
Notes: * A 460 volt, 3-phase unit that utilize an ECM fan motor will need a 4-wire WYE voltage supply with 3 hot leads and
a neutral wire. To power the ECM motor with neutral and one hot for 277/60/1 voltage to the ECM motor.
IM 930-6 •EnnityVerticalWaterSourceHeatPumps 4 www.DaikinApplied.com

reCeiving and storage
www.DaikinApplied.com 5 EnnityVerticalWaterSourceHeatPumps• IM 930-6
Sharpedgescancausepersonalinjury.Avoidcontactwiththem.
Usecareandwearprotectiveclothing,safetyglassesandgloves
whenhandlingpartsandservicingheatpumps.
CAUTION
Uponreceiptoftheequipment,checkcartonforvisible
damage.Makeanotationontheshipper’sdelivery
ticketbeforesigning.Ifthereisanyevidenceofrough
handling,immediatelyopenthecartonstocheckfor
concealeddamage.Ifanydamageisfound,notify
thecarrierwithin48hourstoestablishyourclaimand
requesttheirinspectionandareport.TheWarranty
ClaimsDepartmentshouldthenbecontacted.
Donotstandortransportthemachinesonend.For
storing,eachcartonismarkedwith“up”arrows.
Intheeventthatelevatortransfermakesup-ended
positioningunavoidable,donotoperatethemachine
untilithasbeeninthenormaluprightpositionforatleast
24hours.
Temporarystorageatthejobsitemustbeindoor,
completelyshelteredfromrain,snow,etc.Highorlow
temperaturesnaturallyassociatedwithweatherpatterns
willnotharmtheunits.Excessivelyhightemperatures,
140°F(60°C)andhigher,maydeterioratecertainplastic
materialsandcausepermanentdamage.
IMPORTANT
Thisproductwascarefullypackedandthoroughlyinspected
beforeleavingthefactory.Responsibilityforitssafedelivery
wasassumedbythecarrieruponacceptanceofthe
shipment.Claimsforlossordamagesustainedintransit
mustthereforebemadeuponthecarrierasfollows:
VISIBLE LOSS OR DAMAGE
Anyexternalevidenceoflossordamagemustbenoted
onthefreightbillorcarrier’sreceipt,andsignedbythe
carrier’sagent.Failuretoadequatelydescribesuchexternal
evidenceoflossordamagemayresultinthecarrier’s
refusaltohonoradamageclaim.Theformrequiredtole
suchaclaimwillbesuppliedbythecarrier.
CONCEALED LOSS OR DAMAGE
Concealedlossordamagemeanslossordamagewhich
doesnotbecomeapparentuntiltheproducthasbeen
unpacked.Thecontentsmaybedamagedintransitdue
toroughhandlingeventhoughthecartonmaynotshow
externaldamages.Whenthedamageisdiscoveredupon
unpacking,makeawrittenrequestforinspectionbythe
carrier’sagentwithinfteen(15)daysofthedeliverydate
andleaclaimwiththecarrier.
Pre-Installation
WARNING
The installer must determine and follow all applicable codes
andregulations.Thisequipmentpresentshazardsofelectricity,
rotatingparts,sharpedges,heatandweight.Failuretoreadand
followtheseinstructionscanresultinpropertydamage,severe
personal injury or death. This equipment must be installed by
experienced,trainedpersonnelonly.
1. Topreventdamage,donotoperatethisequipment
forsupplementaryheatingandcoolingduringthe
constructionperiod.
2. Inspectthecartonforanyspecictaggingnumbers
indicatedbythefactoryperarequestfromthe
installingcontractor.Atthistimethevoltage,phase
andcapacityshouldbecheckedagainsttheplans.
3. Checktheunitsizeagainsttheplanstoverifythat
theunitisbeinginstalledinthecorrectlocation.
4. Beforeinstallation,checktheavailablecloset
dimensionsversusthedimensionsoftheunit.
5. Notethelocationandroutingofwaterpiping,
condensatedrainpiping,andelectricalwiring.The
locationsoftheseitemsareclearlymarkedon
submittaldrawings.
6. Theinstallingcontractorwillnditbenecialto
conferwithpiping,sheetmetal,andelectrical
foremenbeforeinstallinganyunit.
Note: Check the unit data plate for correct voltage with
the plans before installing the equipment. Also,
make sure all electrical ground connections are
made in accordance with local code.
7. Thecontractorshallcovertheunitstoprotectthe
machinesduringnishingofthebuilding.Thisis
criticalwhilesprayingreproongmaterialonbar
joists,sandblasting,spraypaintingandplastering.
8. Theoverallopeningofthedoorwaytomechanical
roommustbe2"widerthantheunitforeasy
installationand/orremoval.
Table 1: Overall Unit Dimensions
Unit Size Dimensions
009 – 012 22¼"Dx20"Wx37"H
015 – 024 24¼"Dx23"Wx46½"H
030 – 036 24¼"Dx23"Wx50½"H
042 – 048 32½"Dx25"Wx46½"H
060 – 070 32½"Dx25"Wx58½"H
Note: Dimensions are approximate.

loCating the unit
IM 930-6 •EnnityVerticalWaterSourceHeatPumps 6 www.DaikinApplied.com
1. Locatetheunitinanareathatallowsforeasy
removalofthelterandaccesspanels,andhas
enoughspaceforservicepersonneltoperform
maintenanceorrepair.Providesufcientroomto
makewater,electricalandductconnections.
2. Makesurethatsufcientaccesshasbeenprovidedfor
installingtheunit,includingclearanceforductcollars
andttingsatwaterandelectricalconnections.
3. Allowadequateroomaroundtheunitfora
condensatepiping.
4. Theunitcanbeinstalled“freestanding”inan
equipmentroom.However,closetinstallationsare
morecommonforsmallverticaltypeunits.
Generally,theunitislocatedinthecornerofacloset
withthenon-ductedreturnairfacing90°tothedoorand
themajoraccesspanelsfacingthedoorasinFigure1.
Alternatively,theunitcanhaveaductedreturnairwith
theopeningfacingthedoorandthemajoraccesspanels
facing90°tothedoorasinFigure2.
5. Unitmustbelocatedontopofavibrationabsorbing
materialsuchasarubber(Isolationpad)thatis
thesamesizeasthebaseoftheunit,tominimize
vibrationandnoise.SeeFigure9onpage10.
Minimum distance requirement from
return air duct collar to wall for non-
ducted units.
Model Distance
009–012....................... 5inches
015–024....................... 5inches
030–036....................... 6inches
042–048....................... 8inches
060–070..................... 10inches
Figure 1: Typical closet installation with louver door return
(non-ducted)
ReturnAirThru
LouveredDoor
ReturnAirThru
LouveredDoor
Return
Air
Risers
Left-HandReturnAir
Arrangement
Right-HandReturnAir
Arrangement
Return
Air
A Condensate
B DesuperheaterWaterReturn(Optional)
C DesuperheaterWaterSupply(Optional)
D WaterReturn
E WaterSupply
Figure 2: Typical closet installation with ducted return
HeatPumpwith
Right-HandReturnAir
Arrangement
HeatPumpwith
Left-HandReturnAir
Arrangement
Return
Air
Duct&
Grille
Return
Air
Duct&
Grille
Risers
A Condensate
B DesuperheaterWaterReturn(Optional)
C DesuperheaterWaterSupply(Optional)
D WaterReturn
E WaterSupply
F LowVoltageControlWiring(ElectricEntrance)
G LineVoltageUnitPower(ElectricEntrance)
Figure 3: Unit Electrical and Piping Locations
ControlAccessPanel

unit installation
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Ductwork and Attenuation
Dischargeductworkisnormallyusedwiththeseunits.
Wherereturnairductworkisrequired,theunitis
suppliedwitha1"lterrack/ductcollarforconnectionof
returnairductwork.Anoptional2"returnairductcollar
lterrackisavailableasaeld-installedaccessoryor
afactory-installed,selectableoption.The2"lterrack
allowstoollessentryforeasylterreplacement.
Figure 4: Sizes 007 thru 070 Optional 2" Return Air Duct
Collar Filter Rack
Discharge Ducting
Allductworkshouldconformtoindustrystandardsof
goodpracticeasdescribedinASHRAESystemsGuide.
Aeldsupplieddischargeductsystemwillnormally
consistofaexibleconnectorattheunit,anon-insulated
transitionpiecetothefullductsize,ashortrunofduct,
anelbowwithoutvanes,andatrunkductteeinginto
abranchcircuitwithdischargediffusersasshownin
Figure5.
Figure 5: Suggested Unit Ducting
SquareElbow
(BothSides
InternallyLined
WithAcoustic
Insulation)
Trunk Duct
2ft.x2ft.Diffuser
DischargeCollar
HeatPump
Duct
Transition
BranchDuct
(InternallyLined)
Flexible
Duct Collar
Thetransitionpiecemustnothaveananglegreaterthan
30°orseverelossofairperformancecanresult.Do
notconnectthefullductsizetotheunitwithoutusinga
transitionpiecedowntothesizeofthedischargecollar
ontheunit.Withmetalductmaterial,thesidesofthe
elbowandentirebranchductshouldbeinternallylined
withacousticinsulationforsoundattenuation.Glass
berductboardmaterialismoreabsorbingandmay
permitomissionoftheexibleconnector.
Theductworkshouldbelaidoutsothatthereisnoline
ofsightbetweentheunitdischargeandthedistribution
diffusers.
Return Air Ducting
Returnairductscanbebroughtinthroughawallgrille
andthentotheunit.Thereturnductsystemwillnormally
consistofaexibleconnectorattheunitandatrunk
ducttothereturnairgrille.Withmetalductmaterial,the
returnairductshouldbeinternallylinedwithacoustic
insulationforsoundattenuation.Glassberductboard
materialismoreabsorbingandmaypermitomissionof
theexibleconnector.
Returnairductworktotheunitrequiresthe1"(25mm)
standardreturnairductcollarortheoptional2"(51mm)
lterrackkit(seeFigure4).The2"lterrackkitallows
forsidelterremoval.Aexibleductcollarcanthen
beattachedbetweenaducttransitionandthereturn
airductwork.Thereturnairducttransitionmustbethe
samesizeasthereturnaircoilfacearea.
Connectionsofsupplyandreturnairductworkshouldbe
madeattheductcollaroftheunit.Donotpuncturethe
unitcabinetwithsheetmetalscrewsasthiscandamage
thedrainpanorthecoil.
Figure 6: Suggested Return Air Unit Ducting
FlexibleDuctCollar
FullVibrationIsolationPad
TransitionDuct DischargeDuct
Flexible
Duct Collar

unit installation
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Ventilation Air
Outsideairmayberequiredforventilation.The
temperatureoftheventilationairmustbecontrolledso
thatmixtureofoutsideairandreturnairenteringthe
unitdoesnotexceedapplicationlimits.Itisalsogeneral
practicetocloseofftheventilationairsystemduring
unoccupiedperiods(nightsetback).
Theventilationairsystemisgenerallyaseparate
buildingsubsystemwithdistributionductwork.Toprovide
thoroughmixingoftheoutsideandreturnair,introduce
theoutsideairincloseproximitytothereturnairplenum
inlet.Donotductoutsideairdirectlytotheunitinlet.See
"OperatingLimits"onpage9.
Priortomakingpipingconnections, contractor must clean and
ushwaterloopsystem.Failuretoclean/ushsystemmayresult
innuisancetrippingandprematurecomponentfailure.
CAUTION
Cleaning & Flushing Water System
1. Priortorstoperationofanyunit,thewater
circulatingsystemmustbecleanedandushedof
allconstructiondirtanddebris.
Iftheunitsareequippedwithwatershutoffvalves,
eitherelectricorpressureoperated,thesupplyand
returnrunoutsmustbeconnectedtogetherateach
unitlocation.Thiswillpreventtheintroductionofdirt
intotheunit.SeeFigure7.
Figure 7: Connect the runouts together
Return Runout
SupplyRunout
Mains
FlexibleHose
RunoutsInitially
ConnectedTogether
2. Fillthesystematthecitywatermakeupconnection
withallairventsopen.Afterlling,closeallairvents.
Thecontractorshouldstartmaincirculatorwith
thepressurereducingvalveopen.Checkvents
insequencetobleedoffanytrappedair,ensuring
circulationthroughallcomponentsofthesystem.
Powertotheheatrejectorunitshouldbeoff,andthe
supplementaryheatcontrolsetat80°F(27°C).
Whilecirculatingwater,thecontractorshouldcheck
andrepairanyleaksintheunitandsurroundingpiping.
Drainsatthelowestpoint(s)inthesystemshouldbe
openedforinitialushandblow-down,makingsurecity
waterllvalvesaresettomakeupwateratthesame
rate.Checkthepressuregaugeatpumpsuctionand
manuallyadjustthemakeuptoholdthesamepositive
steadypressurebothbeforeandafteropeningthedrain
valves.Flushshouldcontinueforatleasttwohoursor
longeruntilthedrainwateriscleanandclear.
Unitsmustbecheckedforwaterleaksuponinitialwatersystem
start-up.Waterleaksmaybearesultofmishandlingordamage
duringshipping. Failureby theinstallingcontractortocheckfor
leaksuponstart-upofthewatersystemcouldresultinproperty
damage.
CAUTION
3. Shutoffsupplementalheaterandcirculatorpump
andopenalldrainsandventstocompletelydrain
downthesystem.Shortcircuitedsupplyandreturn
runoutsshouldnowbeconnectedtotheunitsupply
andreturnconnections.Donotusesealersatthe
swivelareconnectionsofhoses.
4. Flushsystemwithwaterfor2hoursorlongeruntil
waterisclean.
5. Rellthesystemwithcleanwater.Testthewater
usinglitmuspaperforacidity,andtreatasrequired
toleavethewaterslightlyalkaline(pH7.5to8.5).
Thespeciedpercentageofantifreezemayalsobe
addedatthistime.Usecommercialgradeantifreeze
designedforHVACsystemsonly.Donotuse
automotivegradeantifreeze.
Oncethesystemhasbeenlledwithcleanwater
andantifreeze(ifused),precautionsshould
betakentoprotectthesystemfromdirtywater
conditions.
Note: Contact a local water treatment company to con-
rm water clarity prior to unit operation.
Dirtywaterwillresultinsystemwidedegradation
ofperformanceandsolidsmayclogsystem-wide
valves,strainers,owregulators,etc.Additionally,the
heatexchangermaybecomecloggedwhichreduces
compressorservicelifeorcausesprematurefailure.
6. Settheloopwatercontrollerheataddsetpoint
to70°F(21°C)andtheheatrejectionsetpointto
85°F(29°C).Supplypowertoallmotorsandstart
thecirculatingpumps.Afterfullowhasbeen
establishedthroughallcomponentsincludingthe
heatrejector(regardlessofseason)andthevented
airandlooptemperatureshavebeenstabilized,
eachoftheunitswillbereadyforcheck,testand
start-up,airbalancing,andwaterbalancing.

unit installation
Operating Limits
Thisequipmentisdesignedforindoorinstallationonly.Shelteredlocationssuchasattics,garages,etc.,generally
willnotprovidesufcientprotectionagainstextremesintemperatureand/orhumidity,andequipmentperformance,
reliability,andservicelifemaybeadverselyaffected.
Table 2: Air limits in °F (°C)
Air Limits Standard Range Units Geothermal Range Units
Cooling Heating Cooling Heating
Minimum Ambient Air 50°F(10°C) 50°F(10°C) 40°F(4°C) 40°F(4°C)
Rated Ambient 80°F(27°C) 70°F(21°C) 80°F(27°C) 70°F(21°C)
Maximum Ambient Air 100°F(38°C) 85°F(29°C) 100°F(38°C) 85°F(29°C)
Minimum Entering Air 50°F(10°C) 50°F(10°C) 50°F(10°C) 40°F(4°C)
Rated Entering Air 80/67°F(27°/19°C) 70°F(21°C) 80/67°F(27°/19°C) 70°F(21°C)
Maximum Entering Air 100/83°F(38/28°C) 80°F(27°C) 100/83°F(38/28°C) 80°F(27°C)
Table 3: Water limits
Water Limits Standard Range Units Geothermal Range Units
Cooling Heating Cooling Heating
Minimum Entering Water 55°F(13°C) 55°F(13°C) 30°F(-1°C) 20°F(-6°C)
Normal Entering Water 85°F(29°C) 70°F(21°C) 77°F(25°C) 40°F(4°C)
Maximum Entering Water 110°F(43°C) 90°F(32°C) 110°F(43°C) 90°F(32°C)
Minimum GPM/Ton 1.5
Nominal GPM/Ton 3.0
Maximum GPM/Ton 4.0
Notes: 1. Maximum and minimum values may not be combined. If one value is at maximum or minimum, the other two
conditions may not exceed the normal condition for standard units. Extended range units may combine any two
maximum conditions, but not more than two, with all other conditions being normal conditions.
2.This is not a normal or continuous operating condition. It is assumed that such a start-up is for the purpose of
bringing the building space up to occupancy temperature.
Antifreeze Correction Factors
Table 4: Ethylene Glycol
10% 20% 30% 40% 50%
Cooling Capacity 0.9950 0.9920 0.9870 0.9830 0.9790
Heating Capacity 0.9910 0.9820 0.9770 0.9690 0.9610
Pressure Drop 1.0700 1.1300 1.1800 1.2600 1.2800
Table 5: Propylene Glycol
10% 20% 30% 40% 50%
Cooling Capacity 0.9900 0.9800 0.9700 0.9600 0.9500
Heating Capacity 0.9870 0.9750 0.9620 0.9420 0.9300
Pressure Drop 1.0700 1.1500 1.2500 1.3700 1.4200
Table 6: Methanol
10% 20% 30% 40% 50%
Cooling Capacity 0.9980 0.9720 – – –
Heating Capacity 0.9950 0.9700 – – –
Pressure Drop 1.0230 1.0570 – – –
Table 7: Ethanol
10% 20% 30% 40% 50%
Cooling Capacity 0.9910 0.9510 – – –
Heating Capacity 0.9950 0.9600 – – –
Pressure Drop 1.0350 0.9600 – – –
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Piping
1. Allunitsshouldbeconnectedtosupplyandreturn
pipinginatwo-pipereversereturnconguration.A
reversereturnsystemisinherentlyself-balancing
andrequiresonlytrimbalancingwheremultiple
quantitiesofunitswithdifferentowandpressuredrop
characteristicsexistinthesameloop.Checkforproper
waterbalancebymeasuringdifferentialtemperature
readingacrossthewaterconnections.Forproper
waterow,thedifferentialtemperatureshouldbe12°F
to14°F(5°Cto8°C)forunitsincoolingmode.
Adirectreturnsystemmayalsowork,butproperwater
owbalancingismoredifculttoachieveandmaintain.
2. Thepipingcanbesteel,copperorPVC.
Note: If using PVC (schedule-40) construction grade
pipe or better, use the manufacturers recom-
mended high temperature adhesive. With PVC
piping the appropriate number of hanger brackets
must be used to help prevent sagging.
3. Supplyandreturnrunoutsusuallyjointheunitviashort
lengthsofhighpressureexiblehosewhicharesound
attenuatorsforbothunitoperatingnoiseandhydraulic
pumpingnoise.Oneendofthehoseshouldhave
aswivelttingtofacilitateremovalforservice.Hard
pipingalsocanbebroughtdirectlytotheunit.This
optionisnotrecommendedsincenovibrationornoise
attenuationcanbeaccomplished.Thehardpiping
musthaveunionstofacilitateunitremoval.SeeFigure
8,Figure9,andFigure10fortypicalpipingdetails.
Figure 8: Typical Vertical Unit Piping
4. Someexiblehosethreadedttingsaresuppliedwith
sealantcompound.Ifnot,applyTeontapeforatightseal.
5. Supplyandreturnshutoffvalvesarerequiredat
eachunit.Thereturnvalveisusedforbalancingand
shouldhavea“memorystop”sothatitcanalways
beclosedoffbutcanonlybereopenedtotheproper
positionfortheowrequired.
6. Donotconnectanyunittothesupplyandreturnpiping
untilthewatersystemhasbeencleanedandushed
completely.Afterthecleaningandushinghastaken
place,theinitialconnectionshouldhaveallvalveswide
openinpreparationforwatersystemushing(see
"Cleaning&FlushingWaterSystem"onpage8).
7. Condensatepipingcanbesteel,copperorPVC.
Eachunitincludesacondensateconnection.
8. Unitsareinternallytrapped.
9. Donotlocateanypointinthedrainsystemabove
thedrainconnectionofanyunit.
10. Automaticowcontrolleddevicesmustnotbe
installedpriortosystemcleaningandushing.
11. Ahighpointofthepipingsystemmustbevented.
12. Checklocalcodefortheneedfordielectricttings.
Note: Do not over-torque ttings. The maximum torque
without damage to ttings is 30 foot pounds. If a
torque wrench is not available, use as a rule of
thumb, nger-tight plus one quarter turn.
Figure 9: Typical Vertical Installation and Unit Piping
1 SupplyAirDucting
2 AcousticalThermalLining(10ft.)
3 LineVoltage-7/8"(22mm)Hole
4 LowVoltage-7/8"(22mm)Hole
5 FlexibleDuctCollar
6 LouveredDoorforReturnAir
7 CondensateDrainConnection
8 FlexibleReturnHosewithFlowController/BallValve(3/4"FPT)
9 FlexibleSupplyHosewithY-Strainer/BallValve(3/4"FPT)
10 AccessPaneltoController
11 LEDAnnunciatorStatusLights
12 VibrationIsolationPad

unit installation
www.DaikinApplied.com 11 EnnityVerticalWaterSourceHeatPumps• IM 930-6
Electrical Connections
Note: Installation and maintenance must be performed
only by qualied personnel who are familiar with
local codes and regulations, and are experienced
with this type of equipment.
Sharpedgescancausepersonalinjury.Avoidcontactwiththem.
CAUTION
WARNING
Hazardous Voltage!Theinstallermustdetermine
andfollowallapplicablecodesandregulations.This
equipment presents hazards of electricity, rotating
parts,sharpedges,heatandweight.Failuretoread
andfollowtheseinstructionscanresultinproperty
damage,severepersonalinjuryordeath.
Figure 10: Unit Electrical and Piping Locations
ControlAccessPanel
A Condensate
B DesuperheaterWaterReturn(Optional)
C DesuperheaterWaterSupply(Optional)
D WaterReturn
E WaterSupply
F LowVoltageControlWiring(ElectricEntrance)
G LineVoltageUnitPower(ElectricEntrance)
Operating Voltages
115/60/1 .........104voltsmin.;127voltsmax.
208-230/60/1 .....197voltsmin.;253voltsmax.
265/60/1 . . . . . . . . .238voltsmin.;292voltsmax.
460/60/3 . . . . . . . . .414voltsmin.;506voltsmax.
575/60/3 . . . . . . . . .515voltsmin.;632voltsmax.
Note: Voltages listed are to show voltage range. How-
ever, units operating with over voltage and under
voltage for extended periods of time will experi-
ence premature component failure. Three phase
system unbalance should not exceed 2%.
General
1. Verifythecompatibilitybetweenthevoltageand
phaseoftheavailablepowerandthatshownonthe
unitdataplate.Lineandlowvoltagewiringmust
complywithlocalcodesortheNationalElectrical
Code,whicheverapplies.
2. Applycorrectlinevoltagetotheunit.A7⁄8"(22mm)
hole.Adisconnectswitchneartheunitisrequired
bycode.Powertotheunitmustbesizedcorrectly
andhavedualelement(ClassRK5)fusesoran
HACRcircuitbreakerforbranchcircuitovercurrent
protection.Seethedataplateforcorrectratings.
3. Connectthethermostat/subbasewiringwiththe
power“off”totheunit.
230 Volt Operation
All208-230voltsingle-phaseandthree-phaseunits
arefactorywiredfor208voltoperation.For230phase
operation,thelinevoltagetaponthe24-volttransformer
mustbechanged.Disconnectandcaptheredlead
wireandinterchangeitwiththeorangeleadwireonthe
primaryofthe24-volttransformer.
Fan Assembly
Allfanmotorsaremulti-speedPSCoroptionalECM
(sizes019-070)typewithintegralmountingbracketsand
thermaloverloadprotection.Themotorisisolatedfrom
thefanhousingforminimumvibrationtransmission.PSC
Fanmotorshaveaterminalstriponthemotorbodyfor
simplemotorspeedchangewithoutgoingbacktothe
controlbox.See"ChangingPSCFanMotorSpeed"on
page21.
Allthefan/motorassemblieshavearemovableorice
ringonthehousingtoaccommodatemotorandfan
wheelremovalwithoutdisconnectingtheductwork.
Thefanhousingprotrudesthroughthecabinetallowing
adequatematerialforconnectionofexibleduct.Each
modelunitisshippedfromthefactoryformaximum
performanceandminimumsoundrequirements.Fan
soundlevelsandperformancecanbeaffectedby
externalstaticpressure.

Controls
MicroTech® III Unit Controller
TheMicroTechIIIUnitControllerincludesbuilt-in
featuressuchasrandomstart,compressortimedelay,
shutdown,condensateoverowprotection,defrostcycle,
brownout,andLED/faultoutputs.RefertoTable10on
page14.
Theunithasbeendesignedforoperationwitha
microelectronicwallthermostatselectedbythe
manufacturer.Donotoperatetheunitwithanyother
typeofwallthermostat.
Eachunithasaprintedcircuitboardcontrolsystem.The
lowvoltageoutputfromthelowvoltageterminalstrip
isACvoltagetothewallthermostat.RisA/Cvoltage
outputtothewallstat.
The24voltlowvoltageterminalstripissetupsoR-G
energizesthefan,R-Y1energizesthecompressorfor
coolingoperation,R-W1energizesthecompressorand
reversingvalveforheatingoperation.Thereversingvalve
isenergizedintheheatingmode.Thecircuitboardhas
afaninterlockcircuittoenergizethefanwheneverthe
compressorisonifthethermostatlogicfailstodoso.
TheoutputtothewallstatisACcurrent.Terminal(R)on
thewallstatcanbeconnectedtoterminal(R)onthePC
boardforACvoltage.
R =ACcurrent R to G=fanonly
R toY1=cooling R to W1=heat
TheMicroTechIIIunitcontrollerhasalockoutcircuit
tostopcompressoroperationifanyoneofitssafety
switchesopens(highpressureswitchandlowpressure
switchonunitsizes024through060).Ifcompressorlow
suctiontemperatureisdetected,theunitwillgointothe
coolingmodefor60secondstodefrostanyslushinthe
water-to-refrigerantheatexchanger.Ifthecondensate
sensordetectsalleddrainpan,thecompressor
operationwillbesuspendedonlyinthecoolingmode.
Theunitisresetbyopeningandclosingthedisconnect
switchonthemainpowersupplytotheunitintheevent
theunitcompressoroperationhasbeensuspendeddue
tolowtemperature(freezestat)switch,highpressure
switch,orlowpressureswitchonunitsizes048thru
060.Theunitdoesnothavetoberesetonacondensate
overowdetection.
TheMicroTechIIIunitcontrollerfaultoutputsendsa
signaltoanLEDonawallthermostat.Table9onpage
13showsforwhichfunctionsthefaultoutputis“on”
(sendingasignaltotheLED),whenthe“A”terminalis
conguredbyJP4beingopen.
Remote Reset of Automatic Lockouts
TheRemoteResetfeatureprovidesthemeansto
remotelyresetsomelockoutsgeneratedbyhigh-pressure
and/orlow-temperaturefaults.WhentheMicroTechIIIunit
controllerislockedoutduetooneofthesefaults,andthe
causeofthefaultconditionhasbeencleared,energizing
theO-terminalfor11secondsormoreforcesthe
MicroTechIIIunitcontrollertoclearthelockout.Cycling
unitpoweralsoclearsalockoutiftheconditionscausing
thefaulthavebeenalleviated.
TheIntelligentAlarmResetfeaturehelpstominimize
nuisancetripsofautomaticresetlockoutscausedbylow
temperaturefaults.Thisfeatureclearsfaultsthersttwo
timestheyoccurwithina24-hourperiodandtriggers
anautomaticlockoutonthe3rdfault.Theretrycountis
resettozeroevery24hours.
TheMicroTechIIIunitcontrollerhasbuilt-innight
setbackoperation.A“grounded’signaltothe“U”
terminalonTB3oftheunitcontrolputstheunitinto
theunoccupiedmodefornightsetbackoperation.Fan
operationterminatesandunitcontrolwillonlyrespondto
signalattheW2terminal.Daytimeheatingandcooling
operationislockedout.+24VACtoW2energizesthe
compressorandreversingvalveforheatingoperation.
Nightsetbackoperationcanbeoverriddenfortwo
hoursbyenergizingtheOontheTB2terminalof
theunitcontrolfor4to10seconds.Daythermostat
setpointsthencontroltheheatingandcoolingoperation.
TheMicroTechIIIunitcontrolleralsoaccommodates
shutdownoperationonreceiptofa“grounded”signalto
the“E”input,respectively,onTB3inputterminalofthe
unit control.
TheIV/PR(H8)terminalsoftheMicroTechIIIunit
controllerareusedformotorizedvalve/pumprestart.
Thisterminalpassesavoltagesignalwheneverthe
unitcompressoristurnedon.Thissignalisdetected
byapumprestartrelayprovidingaN.O.orN.C.set
ofcontactsforheatpumploopcirculationpumpor
motorizedvalvecontrol.Whenusedwithasystem
control(byothers),therelayoperationaccommodates
turningoffcirculationpumpsduringunoccupiedperiods
withasafetyoverridedependent,atminimum,on
WSHP’sneed.TheIV/PR(H8)terminalsmaybe“daisy
chained”between200units.
IM 930-6 •EnnityVerticalWaterSourceHeatPumps 12 www.DaikinApplied.com

Controls
www.DaikinApplied.com 13 EnnityVerticalWaterSourceHeatPumps• IM 930-6
Table 8: MicroTech® III Unit Controller Terminals
Locations and Descriptions
H1–1 24 24VACPowerInput
H1–2 C24VACcommon
H2–1 SL1 FanLowSpeedOutput–SwitchedL1
H2–2 BlankTerminal
H2–3 NFanLowSpeedOutput–Neutral
H3–1 HP1-1 CompHighPressureSwitch(HP1)InputTerminal1
H3–2 HP1-2 CompHighPressureSwitch(HP1)InputTerminal2
H4–1 1DischargeAirTempSensor–Common
H4–2 DischargeAirTempSensor–Signal
H4–3 LeavingWaterTempSensor–Common
H4–4 LeavingWaterTempSensor–Signal
H5–1 1I/OExpansionModuleCommon(Gnd)
H5–2 I/OExpansionModuleCommon(Gnd)
H5–3 I/OExpansionModule+5VDC
H5–4 I/OExpansionModuleSPICE1
H5–5 I/OExpansionModuleSPICLK
H5–6 I/OExpansionModuleSPIOUT
H5–7 I/OExpansionModuleSPIIN
H5–8 I/OExpansionModule+12VDC
H5–9 I/OExpansionModule24VAC
H5–10 I/OExpansionModule24VAC
H5–11 No Connection
H5–12 No Connection
H6–1 1CondensateOverowSignalInput
H6–2 CompressorSuctionTempSensor(LT1)–Common
H6–3 CompressorSuctionTempSensor(LT1)–Signal
H6–4 CompressorLowPressureSwitch(LP1)–SourceVoltage
H6–5 CompressorLowPressureSwitch(LP1)–Signal
H6–6 ReversingValve–Common
H6–7 ReversingValve–Output
H7–1 1 No Connection
H7–2 No Connection
H7–3 RedLEDOutput
H7–4 GreenLEDOutput
H7–5 YellowLEDOutput
H7–6 Red-Green-YellowLEDCommon
H8–1 1IsolationValve/PumpRequestRelayN/O
H8–2 IsolationValve/PumpRequestRelayN/C
H8–3 24VACCommon
H9–1 1RoomTempSensor&TenantOverride–Signal
H9–2 RoomTempSensor&TenantOverride–Common
TB1–1 1RoomSensor–StatusLEDOutput
TB1–2 2RoomSensor–FanMode&UnitModeSwitches
TB1–3 3RoomSensor–SetpointAdjustPotentiometer
TB1–4 4RoomSensor–RoomTempSensor&TenantOverride
TB1–5 5RoomSensor–DCSignalCommon
TB2–1 R24VAC
TB2–2 A Alarm Output
TB2–3 W2 Thermostat–HeatStage#2Input
TB2–4 W1 Thermostat–HeatStage#1Input
TB2–5 Y2 Thermostat–CoolStage#2Input
TB2–6 Y1 Thermostat–CoolStage#1Input
TB2–7 GThermostat–FanInput
TB2–8 OThermostat–TenantOverrideInput
TB2–9 C24VACCommon
TB3–1 EEmergencyShutdownInput
TB3–2 U Unoccupied/Occupied Input
L1–1 L1-1 LineVoltageTerminal1
L1–2 L1-2 LineVoltageTerminal2
L1–3 L1-3 LineVoltageTerminal3
N1 N1 Neutral Terminal 1
N2 N2 Neutral Terminal 2
N3 N3 Neutral Terminal 3
COMP
Relay
SWL1 Switch–L1Voltage
L1 No Connection
Table 9: MicroTech III Controller Configuration Jumper Settings
Baseboard Description Jumper(s) Jumper Setting Function
Normal / Test Mode JP1
Open Normal Operation
Shorted Service/TestMode
Fan Operation JP2
Open ContinuousFanOperation(On)
Shorted CyclingFanOperation(Auto)
Loop Fluid JP3
(seewarning)
Open Waterfreezeprotection(factorydefaultsetting)
Shorted Systemswithanti-freezeprotection
Alarm "A" Terminal Output Polarity JP4
Open Faultde-energizesalarmoutputto0VAC.
Shorted Faultenergizesalarmoutputto24VAC.
Room Sensor Setpoint
Potentiometer Range JP5
Open ShortRange:-3to+3ºF(-1.67to+1.67ºC)
Shorted LongRange:55to95ºF(12.78to35ºC)
Thermostat / Room Sensor JP6
Open ThermostatControl
Shorted RoomSensorControl
Not Used JP7 Open –
Not Used JP8 Open –
WARNING
Properantifreeze/watersolutionisrequiredtominimizethepotentialofuidfreeze-up.JumperJP3isfactorysetforwaterfreezeprotectionwiththejumperopen.Operationwithanti-freeze
protectionrequiresJP3tobeeldconguredforthejumperclosed.Ifunitisemployingafreshwatersystem(noanti-freezeprotection),itisextremelyimportantthatJP3jumpersetting
remainsintheopenposition(factorydefaultsetting)inordertoshutdowntheunitattheappropriatewatertemperaturetoprotectyourheatpumpfromfreezing.Failuretodosocanresult
inunitdamageanduidleaks.”

Controls
IM 930-6 •EnnityVerticalWaterSourceHeatPumps 14 www.DaikinApplied.com
Table 10: MicroTech III Controller Status LED's
Description Type* Yellow Green Red
EmergencyShutdown Mode OFF Flash OFF
LowVoltageBrownout Fault OFF Flash OFF
HighPressure(HP1) Fault OFF OFF Flash
LowPressure(LP1) Fault OFF OFF ON
LowSuctionTemp(LT1)SensorFail Fault Flash Flash ON
LowSuctionTemp(LT1) Fault Flash OFF OFF
RoomTempSensorFail(withRoomSensorControlOnly) Fault Flash Flash ON
CondensateOverow(Cooling&DehumidicationModesOnly) Fault ON OFF OFF
LowEnteringWaterTemp(HeatingCompressorInhibit;NoDisplaywithBoilerlessEH) Fault Flash OFF Flash
SerialEEPROMCorrupted Fault ON ON ON
ServiceTestModeEnabled Mode Flash Flash Flash
Unoccupied Mode Mode ON ON OFF
Occupied,Bypass,Standby,orTenantOverrideModes Mode OFF ON OFF
Note:* Mode / Faults are listed in order of priority.

Controls
Note: A random start delay time between 300 and 360
seconds is generated at power up.
Figure 11: MicroTech III Unit Controller Terminal Locations
Figure 12: Location of Configuration Jumpers on the
MicroTech III Unit Controller
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Controls
I/O Expansion Module
ThismanualcoverstheinstallationofaDaikinVertical
FloorUnit-ModelVFC,VFWWaterSourceHeatPump.
ForinstallationandoperationinformationonMicroTech
IIIunitcontrollerandotherancillarycomponents,see:
■ IM927-MicroTechIIIUnitControllerforWater
SourceHeatPumps(LonWorks).
TheI/OExpansionModuleisaeld-installedoption.It
isanextensionoftheMicroTechIIIunitcontrollerand
providesextrafunctionality.
TheI/OExpansionModulehas4mainpurposes:
■ TheMicroTechIIIunitcontrollerincombination
withtheI/OExpansionModulewillbethestandard
controlsystemfortwo-stageWaterSourceHeat
Pumpequipment.(i.e.largeverticalunits).
■ TheI/OExpansionModulehasoutputstocontrol
electricheatonastandardWaterSourceHeat
Pump.
■ TheI/OExpansionModulehasoutputsformulti-
speedfansonastandardWaterSourceHeatPump.
■ TheI/OExpansionModulehasanindependentLED
annunciatortoidentifyoperationalfaultconditions
onsecondstageequipment.
Figure 13: I/O Expansion Module Configuration Jumper
Terminals
JumperTerminals
Features
Standard Heat Pumps / Single Circuit
Units
■ Monitorsenteringwatertemperatureforboilerless
electricheatcontrol
■ Outputsformediumandhighspeedfancontrols.
IM 930-6 •EnnityVerticalWaterSourceHeatPumps 16 www.DaikinApplied.com

Controls
www.DaikinApplied.com 17 EnnityVerticalWaterSourceHeatPumps• IM 930-6
Table 11: I/O Expansion Module Jumper Settings
I/O Expansion Description Jumper(s) Jumper Setting Model
CompressorOptions JP1
JP1 Open SingleCompressorModel(factorydefaultsetting)
JP1 Shorted DualCompressorModel
HotGas/WaterReheat(HGR)
Dehumidication JP2
JP2 Open None(default)
JP2 Shorted HotGas/WaterReheat(HGR)
SecondaryHeatingOptions* JP3&JP4
JP3 Open
None
JP4 Open
JP3 Shorted SupplementalElectricHeat
JP4 Open
JP3 Open
BoilerlessElectricHeat
JP4 Shorted
FanSpeedSelection JP5&JP6
JP5 Open
SingleSpeedFan(PSCmotor)
JP6 Open
JP5 Shorted
Two-SpeedFan(ECMmotor)*
JP6 Open
JP5 Open
Three-SpeedFan*
JP6 Shorted
NotUsed JP7 JP7 Open –
LeadCompressorOption JP8
JP8 Open Compressor#1isLead(factorydefaultsetting)
JP8 Shorted Compressor#2isLead(ValidforDualCompressorModelsOnly)
* Available with secondary heating options in addition to ECM motor.
Table 12: I/O Expansion Module LED & Fault Outputs
Description Type Yellow Green Red
InvalidJumperConguration Fault Flash Flash OFF
BaseboardCommunicationFail Fault OFF Flash Flash
EnteringWaterTempSensorFail(withBoilerlessElectricHeating) Fault Flash Flash ON
ServiceTestModeEnabled Mode Flash Flash Flash
Unoccupied Mode Mode ON ON OFF
Occupied,Bypass,Standby,orTenantOverrideModes Mode OFF ON OFF
Note: Mode / Faults are listed in order of priority.
I/O Expansion module supplied with ECM motor, Boilerless and Supplemental Electric Heat options.

Controls
IM 930-6 •EnnityVerticalWaterSourceHeatPumps 18 www.DaikinApplied.com
MicroTech III Controller With
lonWorks® Communication
Module
ThismanualcoverstheinstallationofaDaikinVertical
FloorUnit-ModelVFC,VFWWaterSourceHeatPump.
ForinstallationandoperationinformationonLonWorks
CommunicationModuleandotherancillarycontrol
components,see:
■ IM927-MicroTechIIIWaterSourceHeatPump
LonWorksCommunicationModule
■ IM933-LonMakerIntegrationPlug-inTool:Foruse
withtheMicroTechIIIUnitController
■ IM955-MicroTechIIIWallSensorforusewith
MicrotechIIIUnitController
Figure 14: LonWorks Communication Module
TheLonWorkscommunicationmodulewillplugintothe
MicrotechIIIunitcontrollerattheCN_LON1Header(see
Figure16onpage20).
EachDaikinwatersourceheatpumpcanbeequipped
withaLonWorkscommunicationmodule.The
controllerismicroprocessor-basedandisdesigned
tocommunicateoveraLonWorkscommunications
network.Theunitcontrollerisfactoryprogrammedand
testedwithallthelogicrequiredtomonitorandcontrol
theunit.Thewallthermostatsetstheunitmodeof
operation.Theunitcontrollermonitorswaterandair
temperatures,andcancommunicatefaultconditionstoa
LonWorkscommunicationsnetwork.
TheMicroTechIIIunitcontrollerwithcommunication
moduleincludesaunit-mountedreturnair,dischargeair
andleavingwatertemperaturesensor.Wallmounted
temperaturesensorsincludesetpointadjustment
andtenantoverride.Theuserhasthecapabilityof
substitutingthewallsensorwithaduct-mountedreturn
airsensor.
Eachunitcontrollerorchestratesthefollowingunit
operations:
■ Enableheatingandcoolingtomaintainsetpoint
basedonaroomsensor.
■ Enablefanandcompressoroperation.
■ Monitorallequipmentprotectioncontrols.
■ Monitordischargeairtemperature.
■ Monitorleavingwatertemperature.
■ Relaystatusofallvitalunitfunctions.
■ Supportoptionalcontroloutputs.
MicroTechIIIheatpumpswithaMicroTechIIIunit
controller are LonMarkcertiedanddesignedtobe
linkedwithacentralizedbuildingautomationsystem
throughaLonWorkscommunicationsnetworkfor
centralizedschedulingandmanagementofmultiple
heatpumps.Wall-mountedroomsensorsareavailable
tocontroltheheatingandcoolingoperationofeach
MicroTechIIIWaterSourceHeatPumpUnitController.
Availableroomsensorsinclude:roomsensorwithLED
statusandtenantoverridebutton,roomsensorwithLED
status,timed-overridebutton,roomsensorwithLED
status,timed-overridebutton,andsetpointadjustment,
androomsensorwithLEDstatus,timed-overridebutton,
setpointadjustment.
TheMicroTechIIIwatersourceheatpumpunitcontroller
providescontrolofDaikinwatersourceheatpumps.
Thecontrollerenablesthemodeofoperation,monitors
thewaterandairtemperatures,andindicatesfault
conditions.Eachunitcontrollerisfactoryprogrammed,
wired,andtestedforeffectiveoperationofyourDaikin
watersourceheatpump.
TheMicroTechIIIwatersourceheatpumpcontroller
usesLonWorkstechnology.
LonMark®3.4certiedapplicationcodeisthecurrent
standardapplicationcodeforMicroTechIIIunits.

Controls
www.DaikinApplied.com 19 EnnityVerticalWaterSourceHeatPumps• IM 930-6
MicroTech III Controller with
BACnet Communication Module
ForinstallationandoperationinformationonMicroTech
IIIunitcontrollerandotherancillarycomponents,see:
■ IM928-MicroTechIIIBACnetCommunication
Module
■ OM931-MicroTechIIIUnitControllerforWater
SourceHeatPumpsOperationandMaintenance
Manual
■ IM955-MicroTechIIIWallSensorForusewith
MicrotechIIIUnitController
Daikinwatersourceheatpumpsareavailablewitha
BACnetMS/TPcommunicationmodulethatisdesigned
tocommunicateoveraBACnetMS/TPcommunications
networktoabuildingautomationsystem(BAS).Itcanbe
factoryoreld-installed.
Theunitcontrollerisprogrammedandtestedwithallthe
logicrequiredtomonitorandcontroltheunit.Anoptional
wallsensormaybeusedwiththecommunication
moduletoprovidelimitedlocalcontrolofthewater
sourceheatpump.Theunitcontrollermonitorswater
andairtemperaturesandpassesinformationtothe
communicationmodule.Themodulecommunicateswith
theBAS,toprovidenetworkcontrolofthewatersource
heatpump.
Themodulemakesoperationaldataandcommands
availableonacommunicationsnetworkusingBACnet
objectsandproperties:
■ Thenetworkcableisashieldedtwisted-paircable
Networkcommunicationsrunupto76.8Kbps
■ DIPswitchesonthecontrollerenabletheMS/TP
MACaddresstobesetintherange0-127
■ FourgreenstatusLEDsonthecommunication
moduleindicatecommunicationactivityonthe
MS/TPcommunicationnetworkandwiththeunit
controller
Figure 15: MicroTech III BACnet Water Source Heat Pump
Snap-in Communication Module
MicroTech III Unit Controller with
BACnet MS/TP Communication
Module orchestrates the following unit
operations:
■ Enableheatingandcoolingtomaintainsetpoint
basedonaroomsensor
■ Enablefanandcompressoroperation
■ Monitorsallequipmentprotectioncontrols
■ Monitorsroomanddischargeairtemperatures
■ Monitorsleavingwatertemperature
■ Relaysstatusofallvitalunitfunctions
The MicroTech III unit controller with
communication module includes:
■ ReturnAirTemperaturesensor(RAT)(eld-installed)
■ DischargeAirTemperaturesensor(DAT)(eld-
installed)
■ LeavingWaterTemperaturesensor(LWT)(factory
installed)
Note: Refer to IM 956-X for details to install (RAT) & (DAT)
sensors.
Whenanoptionalwall-mountedroomtemperaturesensoris
connectedtotheunitcontroller,theReturnAirTemperature
(RAT)sensormustnotbeinstalled.Awall-mountedroom
temperaturesensorandthereturnairtemperaturesensor
mustnotbeconnectedsimultaneouslyortheunitwillnot
operateproperly.
CAUTION
Thecommunicationmoduleprovidesaccesstosetpoints
for operational control
Available wall sensors include:
■ RoomsensorwithLEDstatusandtenantoverride
button
■ RoomsensorwithLEDstatus,tenantoverride
button,and±3°Fsetpointadjustment
■ RoomsensorwithLEDstatus,tenantoverride
button,55°to95°Fsetpointadjustment

Controls
Figure 16: LonWorks Communication Module Placement on MicroTech III Unit Controller
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