Hitachi DXF-2.0A1 Instruction Manual

P5417151
Operation Installation
& Maintenance
Manual
VRF HEAT PUMP AIR
CONDITIONERS
- DX-Kit -
CONTROL BOX
EXPANSION VALVE BOX
Type Power Source Model
DX-Kit
(for General
AHU
Connection)
220-240V/1ϕ/50Hz
220V/1ϕ/60Hz
DXF-2.0A1
DXF-4.0A1
DXF-6.0A1
DXF-10.0A1
DXF-20.0A1
DXF-30.0A1
IMPORTANT:
READ AND UNDERSTAND
THIS MANUAL BEFORE
INSTALLING THIS HEAT
PUMP AIR CONDITIONER.
KEEP THIS MANUAL FOR
FUTURE REFERENCE.

Declaration of Conformity
(Manufacturer’s Declaration)
Qingdao Hisense Hitachi Air-conditioning Systems Co., Ltd.
Add.:No.218,Qianwangang Road,Economic and Technological Development Zone, Qingdao, China
declares under its sole responsibility that the air conditioning models to which this declaration relates:
DXF-2.0A1, DXF-4.0A1, DXF-6.0A1
DXF-10.0A1,DXF-20.0A1,DXF-30.0A1
are in conformity with the following standard(s) or other normative document(s), provided that
these are used in accordance with our instructions:
EN 60335-1
EN 60335-2-40
EN 62233
EN 55014-1
EN 61000-3-2
EN 61000-3-3
EN 55014-2
following the provisions of:
2006/42/EC
2014/30/EU
2012/19/EU
2011/65/EU
Directives, as amended.
Manufacturing number and manufacturing year: refer to model
Nameplate. Notes:
This declaration becomes invalid, if technical or operational modifications
are introduced without the Manufacturer's consent.
Johnson Controls Hitachi Air Conditioning Europe SAS is authorised to Compile the Technical
Construction File.
Add. : 2 Rue de Lombardie, Parc Aktiland II 69800 Saint-Priest, France
Name, Surname:
Position/ Title: Director
Date: July 25, 2019

INDEX
Important Notice...................................................................................................................................................2
1 Safety Summary .............................................................................................................................................3
2 System Description.........................................................................................................................................5
2.1 System Overview ...................................................................................................................................5
2.2 Product Line-up......................................................................................................................................7
2.3 Factory-Supplied Accessories................................................................................................................8
2.4 Limitation of Installation and AHU ..........................................................................................................9
2.5 CapacityControlMode......................................................................................................................... 11
3 Transportation and Handling.........................................................................................................................16
3.1 Transportation ......................................................................................................................................16
3.2 Installation Location..............................................................................................................................16
3.3 Dimension Data....................................................................................................................................16
3.4 Installation Method ...............................................................................................................................16
3.5 ThermistorInstallation..........................................................................................................................18
4 Refrigerant Piping Work................................................................................................................................19
4.1 Piping Materials....................................................................................................................................19
4.2 Piping Connection ................................................................................................................................19
5 ElectricalWiring ............................................................................................................................................20
5.1 GeneralCheck .....................................................................................................................................20
5.2 ElectricalWiringConnection ................................................................................................................20
5.3 ControlBoxTerminalBlock ..................................................................................................................21
5.4 ExpansionValveBox............................................................................................................................21
5.5 TerminalBlockConnectionandRemarks ............................................................................................22
6 OptionalSettingandInput/OutputSetting ....................................................................................................23
6.1 OptionalSettingandInput/OutputSettingonWiredController............................................................23
6.2 InitializationofOptionalSettingandInput/OutputSettingbyWiredController ....................................23
6.3 OptionalSettingandInput/OutputSetting............................................................................................23
6.4 InputSetting .........................................................................................................................................26
6.4.1 RemoteControlON/OFFFunction .............................................................................................26
6.4.2 ControlbyField-SuppliedRoomThermostat(Settingindication01/02).....................................29
6.4.3 CoolingorHeatingOperationModeSetting(Settingindication07) ...........................................30
6.5 OutputSetting ......................................................................................................................................31
7 Setting of DIP Switches ................................................................................................................................32
8 Test Run........................................................................................................................................................33
9 Warranty Policy and Disclaimer ....................................................................................................................33

P5417151-rev.11
IMPORTANT NOTICE
Correct Disposal of this product
Thismarkingindicatesthatthisproductshouldnotbedisposedwithother
householdwastes.Topreventpossibleharmtotheenvironmentorhuman
healthfromuncontrolledwastedisposal,recycleitresponsiblytopromotethe
sustainablereuseofmaterialresources.Toreturnyouruseddevice,pleaseuse
the return and collection systems or contact the retailer where the product was
purchased. They can take this product for environmentally safe recycling.
< Signal Words >
● Signalwordsareusedtoidentifylevelsofhazardseriousness.
Denitionsforidentifyinghazardlevelsareprovidedbelowwiththeirrespectivesignalwords.
: DANGERindicatesahazardoussituationwhich,ifnotavoided,
will result in death or serious injury.
: WARNINGindicatesahazardoussituationwhich,ifnotavoided,
could result in death or serious injury.
: CAUTION,usedwiththesafetyalertsymbol,indicatesahazardoussituationwhich,
if not avoided, could result in minor or moderate injury.
: NOTICEisusedtoaddresspracticesnotrelatedtopersonalinjury.
: NOTEisusefulinformationforoperationand/ormaintenance.
DANGER
WARNING
CAUTION
NOTICE
NOTE
ENGLISH

2 P5417151-rev.1
●HITACHI pursues a policy of continuing improvement in design and performance in its products.
Assuch,HITACHIreservestherighttovaryspecicationswithoutnotice.
● HITACHIcannotanticipateeverypossiblecircumstancethatmightinvolveapotentialhazard.
●This product is designed for standard air conditioning applications only. Do not use this product for
anything other than the purposes for which it was intended for.
●The installer and system specialist shall secure safety against refrigerant leakage according to local
regulationsandstandards.Thefollowingstandardsmaybeapplicable,iflocalregulationsarenot
available.InternationalOrganizationforStandardization:(ISO5149orEuropeanStandard,EN378).
Nopartofthismanualmaybereproducedwithoutwrittenpermission.
●This product shall comes with a full complement of the appropriate Safety, Danger, and Caution,
Warnings.
● Ifyouhavequestions,pleasecontactyourdistributorordealer.
● Thismanualprovidescommondescriptions,basicandadvancedinformationtomaintainandservice
this product which you operate as well for other models.
●This product hasbeendesignedforaspecictemperaturerange.Foroptimumperformanceandlong
life, operate this product withintherangeinthetablebelow.
Temperature
Maximum Minimum
Cooling Operation Indoor 32°CDB/23°CWB 21°CDB/15°CWB
Outdoor 48°CDB -10°CDB
Heating Operation Indoor 27°CDB 15°CDB
Outdoor 15°CWB -20°CWB
DB:DryBulb,WB:WetBulb
* The temperature may change depending on the outdoor unit.
Important Notice
● Thismanualshouldbeconsideredasapermanentpartoftheairconditioningequipmentandshouldremain
with the air conditioning equipment.
Product Inspection upon Arrival
1. Upon receiving this product, inspect it for any damages incurred in transit. Claims for damage, either
apparentorconcealed,shouldbeledimmediatelywiththeshippingcompany.
2. Checkthemodelnumber,electricalcharacteristics(powersupply,voltage,andfrequencyrating)and
any accessories to determine if they are correct.
3. Thestandardutilizationofthisproductshallbeexplainedintheseinstructions.
4. Please contact your local agent or contractor as any issues involving installation, performance, or
maintenance arise. Performing any mechanical alterations on this product without the consent of the
manufacturer will render your warranty null and void.

P5417151-rev.13
1 Safety Summary
●ThisproductisforspeciedusewithincombustiblerefrigerantR410A.UserefrigerantR410Ain
therefrigerantcycle.Donotchargeoxygen,acetyleneorotherammableandpoisonousgases
intotherefrigerantcyclewhenperformingaleakagetestoranair-tighttest.Thesetypesofgases
areextremelydangerousandcancauseanexplosion.Itisrecommendedthatcompressedair,
nitrogenorrefrigerantbeusedforthesetypesoftests.
●Donotpourwaterintotheindoororoutdoorunit.Theseproductsareequippedwithelectrical
parts.Ifpoured,itwillcauseaseriouselectricalshock.
●Donottouchoradjustsafetydevicesinsidetheindoororoutdoorunits.Ifthesedevicesare
touchedorreadjusted,itmaycauseaseriousaccident.
●DonotopentheservicecoveroraccesspanelfortheindoororoutdoorunitswithoutturningOFF
themainpowersupply.
●Refrigerantleakagecancausedi󰀩cultywithbreathingduetoinsu󰀩cientair.TurnOFFthemain
switch,extinguishanynakedamesandcontactyourservicecontractor,ifrefrigerantleakage
occurs.
●Theinstallerandsystemspecialistshallsecuresafetyagainstrefrigerantleakageaccordingto
localregulationsorstandards.
●UseanELB(ElectricLeakageBreaker).Intheeventofafault,thereisdangerofanelectricshock
orareifitisnotused.
●Donotinstalltheoutdoorunitwherethereisahighlevelofoilmist,ammablegases,saltyairor
harmfulgasessuchassulphur.
●Thisproductisdesignedforindoororoutdoorinstallation.Allwiresshouldbeprotectedfrom
outdoorenvironment.
●DonotperforminstallationworkwithoutreferringtothisInstallationManual.Iftheinstructions
arenotfollowed,itmayresultinawaterleakage,electricshockorre.
●Securethesu󰀩cientlystrongfoundationwheninstalling.Ifnot,itmayleadtofallingoftheunit
andinjury.
●Donotinstallwheregenerationorowingofammablegasmaybedetected.Itmaycauseare.
●Donotsteporputanymaterialontheproduct.
●Whenusingrefrigerant,wearleatherglovestopreventcoldinjuries.
●Checktherefrigerantleakage.TherefrigerantR410Aisincombustible,non-toxicandodorlessof
HFCgas.However,ifleakageoccursandgasllsaroom,itmaycausedi󰀩cultywithbreathing
duetoinsu󰀩cientair.
●Asktheelectricalshopwherethequaliedelectricalengineerisprovidedforelectricalworkto
avoidanelectricalshockandredisaster.
●PerformelectricalworkaccordingtoInstallationManualanduseallrelevantregulationsand
standards.Ifnot,itmaycauseanelectricalshockorre.
●Fixthecablessecurelywiththecordclamp.Externalforcesontheconnectorsmayleadtoare.
●PowersupplyisturnedOFFbeforeelectricalwiringworkoraperiodicalcheckisperformed.
●Protectthewiresandelectricalpartsfromratsorothersmallanimals.Ifnot,ratsmaygnawatthe
unprotectedpartsandattheworst,aremayoccur.
●Placetheexpansionvalveboxcableawayfromthepowersourcecabletoavoidmalfunction.
ENGLISH

4 P5417151-rev.1
●Donotuseanysprayssuchasinsecticide,lacquer,hairsprayorotherammablegaseswithin
approximately1mfromthesystem.
●Ifcircuitbreakerorfuseisoftenactivated,stopthesystemandcontactyourservicecontractor.
●Donotperforminstallationwork,refrigerantpipingwork,drainpipingandelectricalwiring
connectionwithoutreferringtoourinstallationmanual.Iftheinstructionsarenotfollowed,itmay
resultinawaterleakage,electricshockorare.
●Checkthatthegroundwireissecurelyconnected.Iftheunitisgroundedincorrectly,itcauses
electricshock.Donotconnectthegroundwiringtogaspiping,waterpiping,lightningconductor
orgroundwiringfortelephone.
●Connectafuseofspeciedcapacity.
●Donotputanyforeignmaterialontheunitorinsidetheunit.
●Makesurethattheoutdoorunitisnotcoveredwithsnoworice,beforeoperation.
●Beforeperforminganybrazingwork,checktoensurethatthereisnoammablematerialaround.
Whenusingrefrigerantbesuretowearleatherglovestopreventcoldinjuries.
●Protectthewires,electricalparts,etc.fromratsorothersmallanimals.
Ifnotprotected,ratsmaygnawatunprotectedpartsanditmaycauseare.
●Fixthecablessecurely.Externalforcesontheterminalsmaycauseare.
WARNING
●Donotinstalltheindoorunit,outdoorunit,wiredcontrollerandcablewithinapproximately
3metersfromstrongelectromagneticwaveradiatorssuchasmedicalequipment.
●Supplyelectricalpowertothesystemtoenergizetheoilheaterfor12hoursbeforestart-upaftera
longshutdown.
●Provideastrongandcorrectfoundationsothat;
a. Theoutdoorunitisnotonanincline.
b. Abnormalsounddoesnotoccur.
c. Theoutdoorunitwillnotfalldownduetoastrongwindorearthquake.
●Donotfastenarenuthard.Itmaycausebreakagewithageddeteriorationandrefrigerant
leakage.Useaspeciedarenut.
●Theapplianceisnottobeusedbychildrenorpersonwithreducedphysical,sensoryormental
capabilities,orlackofexperienceandknowledge,unlesstheyhavebeengivensupervisionor
instructionconcerninguseoftheappliancebypersonresponsiblefortheirsafe.
●Supervisechildrenandpreventthemfromplayingwiththeappliance.
●Theapplianceshouldnotbeinstalledinthelaundry.
● Itisrecommendedthattheroombeventilatedevery3to4hours.
● Seebelowfortheheatpumpairconditioneroperationrange.
Installationaltitude:lessthan1000meters
Frequencyofsupplypower:within±1%Hzofratedfrequency
Transportstoragetemperature:within-25to55°C
● AlltheA-weightedemissionsoundpressurelevelatworkstationsmustbe70dB(A)orless.
NOTICE

P5417151-rev.15
2 SystemDescription
DX-Kitisspeciallydesignedtoallowconnectionofdirectexpansioncoils(DXcoil)inaeld-suppliedAir
HandlingUnit(AHU)toINVERTER-DRIVENMULTI-SPLITSYSTEMAIRCONDITIONERSoutdoorunitsfor
cooling and heating applications.
2.1 System Overview
DX-KitiscomposedofControlBoxforsystemcontrolwithPCBandalltheelectronicstu󰀨,andExpansion
ValveBoxforrefrigerantcyclecontrolinwhichanelectricalexpansionvalveislocated.Thefollowinggure
showsaninstallationexampleforthesystem.
MulticombinationwithAHUandstandardindoorunit
●TheinstallationdistancebetweentheDX-KitandtheAHUmustbeasshortaspossible.
●Thedistancebetweentheunitordevicewithheatexchangerandtheexpansionvalveboxforthe
pipinglengthmustbe5morless.Becertaintheelevationdi󰀨erencebetweentheunitordevice
withheatexchangerandtheexpansionvalveboxdoesnotexceed2m.
●Installationdistancebetweenthecontrolboxandtheunitordevicewithheatexchangermustbe
shortenoughsothatthethermistorssensingarenotdistorted.
●Thethermistorcablemustnotbeinstalledinthesameductingaspowerorcontrolcables.
Fig.2.1 System Overview (1)
●SelectanappropriateAHUwithappropriatespecicationsandcompatibilitywithregulations.Matchwith
rightDX-Kitandoutdoorunits,ifnottheperformance,operationreliabilityandLifetimeofentireAHU
systemmaybeinuenced.
●ThetemperatureoftheheatexchangerinsidetheAHUmaybecomedownto-20°Candthedischargeair
temperaturemaybecome0°Cduringcoolingoperation.ThecomponentsandmaterialsinsidetheAHU
shallbecompatiblewiththetemperature.Notethatdewcondensationontheheatexchanger,AHUmain
bodyandtherefrigerantpipeoccurs.DrainandinsulatetheAHUandpipeproperly.
●ThetemperatureoftheheatexchangerinsidetheAHUmaybecomeupto120°Candthedischargeair
temperaturemaybecome60°Cduringheatingoperation.ThecomponentsandmaterialsinsidetheAHU
shallbecompatiblewiththetemperature.
●The performance may not reach due to outside temperature limitation and protection for outdoor units.
●Interlock the AHU with the system to protect the equipment when the system error occurs.
Ti
Capacity
Ratio W1
Capacity
Ratio W2
ENGLISH

6 P5417151-rev.1
Item Description Item Description
1 Outdoor Unit 10 Outdoor-Indoor Communication
2 DX-Kit 11 Standard Indoor Unit
3ControlBox 12 ControlWiresForElectricalExpansionValve
4ExpansionValveBox 13 Wired Controller Communication
5Wired Controller 14 Control Wires For AHU
6AHU 15 Outlet Air Thermistor
7HeatExchanger 16 Inlet Air Thermistor
8 Liquid Line 17 Liquid Pipe Thermistor
9 Gas Line 18 Gas Pipe Thermistor
SinglecombinationwithAHU,forDXF-30.0A1(22-30HP)
Fig.2.2 System Overview (2)
SinglecombinationwithAHU
NOTE:
RefertoSection5.5whenconnectwiresfromtwoExpansionValveBoxestothesameterminalofacontrol
box.
Capacity
Ratio W2
Capacity
Ratio W2

P5417151-rev.17
2.2 Product Line-up
DX-KitiscomposedofaControlBoxandanExpansionValveBox.
DX-Kit: DXF-2.0 to 20.0A1
ControlBox ExpansionValveBox
ControlBoxModel:
DXF-A1/1
ExpansionValveBoxModel:
DXF-2.0A1/2
DXF-4.0A1/2
DXF-6.0A1/2
DXF-10.0A1/2
DXF-20.0A1/2
DX-Kit: DXF-30.0A1
ControlBox ExpansionValveBox
ControlBoxModel:
DXF-A1/1
ExpansionValveBoxModel:
DXF-20.0A1/2: 2
ENGLISH

8 P5417151-rev.1
2.3 Factory-Supplied Accessories
Checktoensurethatthefollowingaccessoriesareinthepackagebeforeinstallation.
Accessory Qty Purpose
ControlBox 1SystemControlBox
ExpansionValveBox 2.0 to 20.0A1: 1
30.0A1: 2
ExpansionValveforRefrigerant
CycleControl(6mWire)
Thermistor 4
For Temperature of Sensing of
Outlet Air (red, 10m)
InletAir(blue,10m)
LiquidPipe(black,10m)
Gas Pipe (yellow, 10m)
Installation and Operation Manual 1 For Instructions and Important Notice
* WiredControllerisnotincludedinthepackage.Pleasecontactyourdistributorordealer.
Product Line-up and Capacity
DX-Kit Model
Nominal Heat
ExchangerCapacity
of AHU
Capacity Code
Setting (DSW3)
ExpansionValveBox
Model ControlBoxModel
DXF-2.0A1 2HP DXF-2.0A1/2
DXF-A1/1
DXF-4.0A1 4HP DXF-4.0A1/2
DXF-6.0A1 6HP DXF-6.0A1/2
DXF-10.0A1
8HP
DXF-10.0A1/2
10HP
DXF-20.0A1
12HP
DXF-20.0A1/2
14HP
16HP
18HP
20HP
DXF-30.0A1
22HP
DXF-20.0A1/2
DXF-20.0A1/2
24HP
26HP
28HP
30HP
CapacityCode(DSW3)mustbesetcorrespondingtothenominalheatexchangercapacityoftheAHU.
DSW3islocatedinthemainprintedcircuitboardincontrolbox.
NOTICE

P5417151-rev.19
2.4 Limitation of Installation and AHU
*1Thedistancemustbe5morless.
*2Thedi󰀨erencemustbe2morless.
*3Thelengthmustbe10morless.
*4Thelengthmustbe10morless.
*5Thetemperaturerangemustbe:
Cooling:21°CDB/15°CWB~32°CDB/23°CWB
Heating:15°CDB~27°CDB
*6ThecapacityforMulticombinationwithAHUandstandardindoorunitmustbe:
< W1+W2: More than 100 to 110% >
W2:maximum30%
 AllowableAHUcapacityinasystem:2to6HP
<W1+W2:50to100%>
W2: No Limitation
AllowableAHUcapacityinasystem:NoLimitation
Minimum indoor unit capacity or AHU capacity:
Max.CapacityofSingleAHUin
system
Min. indoor unit capacity or
Min. AHU capacity in a system
12 to 20 HP 0.8 HP
22 to 30 HP 2.0 HP
32to60HP 4.0 HP
62to90HP 6.0HP
ForSinglecombinationwithonlyAHU:
W2:maximum50to100%.
LimitationofInstallationandApplication
RefertoFig.2.1“SystemOverview(1)”andFig.2.2“SystemOverview(2)”forthefollowingsymbols.
L1: the distance*1betweentheheatexchangerofAHUandtheExpansionValveforthepipinglength
H1: theheightdi󰀨erence*2betweentheheatexchangerofAHUandtheExpansionValve
L2: the length*3of thermistor for Outlet Air/Inlet Air/Liquid Pipe/Gas Pipe
L3: the length*4ofcontrolwiresforelectricalexpansionvalve
Ti: the suction air temperature*5justbeforetheDX-coil.
W2: the total AHU capacity with DX-Kit to outdoor unit capacity*6
W1: the total standard indoor unit capacity to outdoor unit capacity*6
ENGLISH

10 P5417151-rev.1
SelectionandLimitationofHeatExchangerofAHU
SelecttheHeatExchangerofAHU(eld-supplied)accordingtothetechnicaldataandlimitationsmentioned
below.Thelifeoftheoutdoorunit,operationrangeoroperationreliabilitymaybeinuencedifneglectthese
limitations.
DX-Kit Model
Nominal Heat
Exchanger
Capacity of AHU
Capacity
Code Setting
(DSW3)
AllowedHeatExchangerCapacity(kW)* HeatExchanger
Volume (dm3)Equivalent
Indoor Unit
Capacity
Mode Min Nom Max Min Max
DXF-2.0A1 2HP Cooling
Heating
4.0
4.5 5.0 5.6 5.6 7.1 0.57 1.16 2HP
DXF-4.0A1 4HP Cooling
Heating
7.1
8.0
9.0
10.0
11.2
12.5 1.03 2.37 4HP
DXF-6.0A1 6HP Cooling
Heating
11.2
12.5
14.0
16.0 16.0 18.0 1.92 2.92 6HP
DXF-10.0A1
8HP Cooling
Heating 16.0 17.9
20.0
22.4
22.4
25.0 2.92 3.89 8HP
10HP Cooling
Heating
20.0
22.4 25.0 28.0
28.0
31.5 3.89 4.76 10HP
DXF-20.0A1
12HP Cooling
Heating
28.0
31.5
30.0
33.5 33.5 37.5 4.76 5.91 12HP
14HP Cooling
Heating 33.5 37.5 35.0 40.0
40.0
45.0 5.85 6.89 14HP
16HP Cooling
Heating
40.0
45.0
43.0
47.5 45.0 50.0 6.79 8.00 16HP
18HP Cooling
Heating 45.0 50.0
48.0
53.0 50.0 56.0 7.57 8.92 18HP
20HP Cooling
Heating 50.0 56.0 52.0 60.0 56.0 63.0 8.47 9.97 20HP
DXF-30.0A1
22HP Cooling
Heating 56.0 63.0 58.0 66.0 61.5 69.0 9.04 11.13 22HP
24HP Cooling
Heating 61.5 69.0 65.0 75.0 69.0 77.5 9.50 12.34 24HP
26HP Cooling
Heating 69.0 77.5
71.0
79.0
73.0
82.5 10.39 12.89 26HP
28HP Cooling
Heating
73.0
82.5 76.0 86.0
80.0
90.0 11.39 13.86 28HP
30HP Cooling
Heating
80.0
90.0
82.0
92.0 85.0 95.0 12.36 14.73 30HP
* Thecoolingandheatingcapacitydatainthetableisbasedonthefollowingindoorandoutdoortemperatureconditions:
Operation conditions Cooling*1Heating*2*1Cooling:
1. Evaporationtemperature:7°C
2. Superheat(SH):5K
3. Pressuredropoftherefrigerantowinheatexchanger:
Max.0.15MPa
*2Heating:
1. Condensation temperature: 47°C
2. Subcool(SC)=15K
3. Pressuredropoftherefrigerantowinheatexchanger:
Max.0.06MPa
Indoor air inlet
temperature
DB 27.0°C 20.0°C
WB 19.0°C -
Outdoor air inlet
temperature
DB 35.0°C 7.0°C
WB -6.0°C
DB:DryBulb,WB:WetBulb
PipeLength:7.5m,PipeHeight:0m
●TheselectedheatexchangerofAHUmustbedesignedforR410A.Thedesignpressureoftheheat
exchangeris4.15MPa.Theburstpressureofheatexchangerandotherpipesmustbemorethan
12.45MPa.Insu󰀩cientstrengthmaycausethebreakageofpipesorgasleakage.
●Keeptherefrigerantleakagerateoftheheatexchanger5gorlessperyear.
●Keepthewatercontentintheheatexchanger60PPMorlessandimpuritycontentintheheat
exchanger100mgorless.Otherwise,watercontentandimpuritycontentintheheatexchanger
willcauseblockingofrefrigerantcycleandfailureofcompressorandvalve.
●Pressuredropoftherefrigerantowinheatexchanger:Max.0.03MPa.

P5417151-rev.111
2.5 CapacityControlMode
CapacitycontrolmodecontrolscapacitybyDX-Kittoadaptthesystemperformanceaccordingtothecooling
andheatingloadrequiredbyuser.
(1) Inlet Air (Room Air) Temperature Control
● CapacityControl:Forcontrollinginletair(roomair)temperature,capacityisadaptedsothatdetection
temperatureofinletair(roomair)reachesthesettemperaturebywiredcontroller.
● Thermo-OFFControl:Whenthermistordetectinletair(roomair)temperaturereachestheset
temperaturebywiredcontroller,theoperationbecomesThermo-OFF.
ROOM
A
Thermistor
Wired
Controlelr
A
A
Outlet Air
Thermistor
Outdoor
unit
Indoor
unit
Wired
Controller
Return air
Outlet air
Outlet air
thermistor
Inlet air
thermistor
Return air application
ROOM
Installed in the return air side
ROOM
Fresh
A
A
Wired
Controlelr
A
Thermistor
A
Outlet Air
Thermistor
Outdoor
unit
Indoor
unit
Wired
Controller
Return air
Outlet air
Outlet air
thermistor
Inlet air
thermistor
Returnairandfreshairmixingapplication
ROOM
Fresh
air
Installed in the return air side
NOTE:
Thermistorofwiredcontrollercanbeusedinsteadoftheinletairthermistor.SettheoptionalfunctionC8to“01”
or “02”.
●Forcontrollinginletair(roomair)temperature,theoptionalsettingE1mustbesetto“00”(factory
setting)inoptionalsettingbywiredcontroller.RefertoSection6.3“OptionalSettingandInput/
OutputSetting”.
●Thesettemperaturebywiredcontroller
Cooling:19to30°C
Heating:17to30°C
ENGLISH

12 P5417151-rev.1
(2) Outlet Air Temperature Control
● CapacityControl:Forcontrollingtheoutletairtemperature,thecapacityisadaptedsothatdetection
temperature of outlet air of AHU reaches the correction temperature of the set temperature for outlet
airbywiredcontroller.
Thecorrectiontemperatureofthesettemperatureforoutletairbywiredcontrolleris:
Cooling:thesettemperaturebywiredcontroller+bb
Heating:thesettemperaturebywiredcontroller+b1
bb,b1:Compensationofoutletairtemperaturesetting.Setbywiredcontrollerinoptionalsettingof
theunit.RefertoSection6.3“OptionalSettingandInput/OutputSetting”.
bb:-6°C(factorysetting:00) b1:+4°C(factorysetting:00)
bb:-4°C(setbywiredcontroller:01) b1:0°C(setbywiredcontroller:01)
bb:-2°C(setbywiredcontroller:02) b1:+2°C(setbywiredcontroller:02)
● Thermo-OFFControl:Whenthermistordetectinletairtemperaturereachescorrectedsettemperature
onwiredcontroller,theoperationbecomesThermo-OFF.
Thecorrectedtemperatureofthesettemperatureforthermo-OFFbywiredcontrolleris:
Cooling:thesettemperatureonwiredcontroller+bb+CF
Heating:thesettemperatureonwiredcontroller+b1-CF
CF:CompensationofThermo-OFFtemperaturesetting.Setbywiredcontrollerinoptionalsettingof
theunit.RefertoSection6.3“OptionalSettingandInput/OutputSetting”.
CF: 0°C (factory setting: 00)
CF:2°C(setbywiredcontroller:01)
CF:5°C(setbywiredcontroller:02)
ROOM
Installed just
before the DX coil.
A
A
Thermistor Thermistor
A A Wired
Controller
A
A
Outdoor
unit
Exhaust
air
Wired
Controller
Return
air
Outlet
air
Outlet air
thermistor
Inlet air
thermistor
Heat recovery application
ROOM
Outdoor
unit
Installedjustbefore
thedx-coil
Fresh
air
●Forcontrollingoutletairtemperature,itisavailableonlyforsinglecombinationwithAHU.
●TheoptionalsettingE1mustbesetto“01”bywiredcontroller.RefertoSection6.3“Optional
SettingandInput/OutputSetting”.
●Theoptionalsettingofoutdoorunit mustbesetto“2”onoutdoorunitPCB.
RefertoOPTIONALFUNCTIONofoutdoorunitservicemanual.
●Thesettemperatureonwiredcontroller.
Cooling:19to30°C
Heating:17to30°C
●Theoutletairtemperaturemaynotreachsetvalueduetoambienttemperatureandprotectionfor
outdoorunits.

P5417151-rev.113
(3) Duty Signal Control
● CapacityControl:Thecapacityofoutdoorunitisxedbyexternaldutysignal,whichcanbeafree-
voltagesignal(0to10Vor0to5V)oracurrentsignal(4to20mA).Thedutysignalisgenerated
byaeld-suppliedDDCandsuppliedtoDX-Kit.Thecapacityofoutdoorunitdependsonthesignal
strength.
● Thermo-OFFControl:Ifthesystemiscontrolledbydutysignal,itcanbeforcedtothermo-OFFbythe
dutysignal.Whenthedutysignalbecomeslowerthan8%ofthefullrangeofthesignal,thesystem
willbeturnedtothermo-OFF.Whenthedutysignalbecomeshigherthan14%ofthefullrange,the
systemwillbeturnedtothermo-ON.
Duty Input
(0-5V) < 0.4V ≥0.7V 0.7V 1.0V 1.2V 1.5V 1.8V 2.0V 2.3V
(0-10V) < 0.8V ≥1.4V 1.4V 2.0V 2.4V 3.0V 3.6V 4.0V 4.6V
(4-20mA) <5.28mA ≥6.24mA 6.24mA 7.20mA 7.84mA 8.80mA 9.76mA 10.40mA 11.36mA
Capacity (% of Normal) Thermo-O󰀨 Thermo-On 40% 45% 50% 55% 60% 65% 70%
Duty Input
(0-5V) 2.6V 2.8V 3.1V 3.3V 3.6V 3.9V 4.1V 4.4V 4.7V
(0-10V) 5.2V 5.6V 6.2V 6.6V 7.2V 7.8V 8.2V 8.8V 9.4V
(4-20mA) 12.32mA 12.96mA 13.92mA 14.56mA 15.52mA 16.48mA 17.12mA 18.08mA 19.04mA
Capacity (% of Normal) 75% 80% 85% 90% 95% 100% 105% 110% 120%
0.4V
0.8V
5.28mA
0V
Capacity
120%
100%
80%
60%
40%
0V
4mA
2.5V
5V
12mA
5V
10V
20mA
0.7V
1.4V
6.24mA
Thermo On Thermo Off
Thermo-OFF
Thermo-ON
Capacity
Thermistor
Thermistor
A
Wired Controller
Outdoor
unit
Outlet air
thermistor
Control
box
DDC
thermistor
Wired controller
DDC(eld-supplied)
AHU
ENGLISH

14 P5417151-rev.1
●Fordutysinglecontrol,itisavailableonlyforsinglecombinationwithAHU.
●TheoptionalsettingitemE1mustbesetto“02”bywiredcontroller.
RefertoSection6.3“OptionalSettingandInput/OutputSetting”.
●Asforthetypeofdutysignal,settheoptionalsettingE4asfollows.
E4:00(factorysetting):0to10V
E4:01(setbywiredcontroller):0to5V
E4:02(setbywiredcontroller):4to20mA
RefertoSection6.3“OptionalSettingandInput/OutputSetting”.
●Theoptionalsettingofoutdoorunit mustbesetto“2”onoutdoorunitPCB.
RefertoOPTIONALFUNCTIONofoutdoorunitservicemanual.
●TheDX-KitwillrespondtothedutysignalonlyaftertheunitisturnedONbywiredcontroller,
centralcontrollerorRemoteControlON/OFFFunction(RefertoSection6.3“OptionalSettingand
Input/OutputSetting”).
●Fordutysignalcontrol,thesystemcongurationreferstoSystemOverview(Section2.1)except
inthecaseofinletairthermistorisnotrequired.
●Theperformancemaybeinsu󰀩cientduetoambienttemperatureandprotectionforoutdoorunits.
●Thecapacityofoutdoorunitiscontrolledbyitsowncontrolsysteminsteadofexternaldutysignal
duringstartrunning,defrostingandrestartrunningafterdefrosting.

P5417151-rev.115
(4) Multi Connection Application for One Large Capacity AHU
● AHUheatexchangershouldbedividedintomultipleheatexchangerswithsamecapacityandrunning
condition.Alltheheatexchangersshouldbeinstalledinparallelinthesamechassisequippedwith
one single fan motor.
● CombinemultipleDX-Kitwiththesamecapacitycorrespondingtoeachheatexchangerinone
refrigerantcycle.EachExpansionValveBoxoftheDX-Kitsshouldbeconnectedtooneheat
exchanger.Refertothegurebelow.
● MaximumnumberofDX-Kitconnectableareve.
● ForeachDX-Kitsystemconguration,refertoSection2.1“SystemOverview”.
● ForwiringbetweenDX-Kitsandfanmotor,refertothegurebelow.
● AllDX-Kitsmustbeconnectedandcontrolledbyonewiredcontroller.
TheoptionalsettingmustbeappliedtoallDX-Kitsbyonewiredcontroller.RefertoSection6.1“Optional
SettingandInput/OutputSettingbyWiredcontroller”.
● Forinletairtemperaturecontrolandoutletairtemperaturecontrol,temperaturecontrolmaynotbe
performedcorrectlybecauseinletairtemperatureandoutletairtemperatureofeachheatexchanger
bythermistorsmaynotbedetectedaccurately.
● InstallationwheremultiplerefrigerantsystemsareconnectedtooneAHUisnotallowed.
● Acurrentsignal(4to20mA)ofdutysignalcontrolisnotavailableinthecaseofmultipleconnection
application.
● Inthecaseofmultipleconnectionapplication,afree-voltage(0to10Vor0to5V)ofdutysignal
controlisavailablebyturningOFFDSW1ofPCB2inControlBox.RefertoSection7“SettingofDIP
Switches”.
● MaximumcapacityofAHUis96HP.
NOTES:
1. TheBranchPipeandtherefrigerantpipeshouldbe
selected according to the total capacity of the heat
exchangers.
Refer to the manual of outdoor units for details.
2. ThepipeconnectingwiththeExpansionValveBox
shouldcoincidewiththeExpansionValveBox.
wire to the fan motor
Fan
Control
Fan
Control
Control
Box 1
Control
Box 2
Remote Control
ON/OFF Function
gnitaeHrognilooC
Operation Mode Setting
)V5-0roV01-0(CDD
Referring to Optional
Setting and Input/Output
Setting (chapter 6.3) .
DNG,A/V
i1,COM
i2,COM
DNG,A/V
i1,COM
i2,COM
Wired Controller
Branch Pipe
Wire to the fan motor
Field-supplied
Fan
control
Fan
control
Control
box1
Control
box2
Refer to Optional setting and input/
outputsetting(chapter6.3).
Wired controller
DDC(0-10Vor0-5V)
Cooling or heating
operation mode setting
Remote control
ON/OFF function
Branchpipe
ENGLISH

16 P5417151-rev.1
3 TransportationandHandling
WARNING
● Donotperforminstallationworkwithout
referringtoInstallationManual.Ifthe
instructionsarenotfollowed,itmayresult
inawaterleakage,electricalshock,re,or
injuryfromfallingoftheDX-Kit.
● DonotsteporputanymaterialontheDX-
Kit.
●DonotinstalltheDX-Kitwhere
electromagneticwaveisdirectlyradiated
tothecontrolboxorexpansionvalvebox.
Installtheexpansionvalvekitatleast3
metersawayfromtheelectromagneticwave
radiator.
●Installanoiselterwhennoiseisemitted
frompowersupply.
● DonotinstalltheDX-Kitwherethereis
generation,owing,builduporleakageof
ammablegas.
● Whenthefalseceilingcontainshigh
humidity,dewcondensationwatermaybe
formedontheoutersurfaceoftheexpansion
valveboxduringcoolingoperation.Inthis
case,applyinsulationontheoutersurface
oftheexpansionvalvebox.
3.1 Transportation
(1) Transport the product to the installation
location without removing any packing
material.
(2) Do not put any material on the DX-Kit when
transporting.
3.2 Installation Location
(1) Installationmethodsareselectableaccording
to the space.
(2) Followthearrowdirectionontheexpansion
valveboxforinstallation.
(3) Keepthedistancebetweentheheat
exchangerofAHUandtheexpansionvalve
boxforthepipinglength5morless.
Makesuretheelevationdi󰀨erencebetween
theheatexchangerofAHUandthe
expansionvalveboxis2morless.
(4) Checkifceilingslabisstrongenough.
Iftheceilingslabistooweaktosupportthe
weight of the DX-Kit, it may cause noise and
vibration.
(5) SecureproperspacearoundtheDX-Kitfor
operation and maintenance work. Also a
serviceaccessdoorshouldbepreparedin
order to remove the DX-Kit without getting
rid of the ceiling plate.
(6) Selectasuitableandconvenientlocationfor
the refrigerant piping connection.
(7) Do not install the DX-Kit in a kitchen where
vaporormistows.Dewcondensationwater
maybeformedontheexpansionvalvebox
during cooling operation. In this case, attach
insulation.
(8) Thesoundofrefrigerantowthroughthe
expansionvalveboxmaybeheard.
Installtheexpansionvalveboxwherethe
sound will not leak such as in the false
ceiling of a hall way.
(9) Forceiling,usesoundproongmaterialsuch
asplasterboard.
3.3 Dimension Data
Controlbox mm
fixing hole (φ6)
fixing hole (φ6)
9 Cable glands
4 fixing screws
for the control
box cover
4xingscrews
for the control
boxcover
9cableglands
Fixinghole(∅6)
Fixinghole(∅6)
Expansionvalvebox
fixing bracket
Control wires
for electrical
expansion valve
Indication of installation direction:
keep the arrow up
Fixingbracket
Indication of installation
direction: keep the arrow up
Control wires for electrical
expansionvalve
3.4 Installation Method
Controlbox
4 fixing screws
for control box
Service
Space
Min.500
Min.100
Min.100
Service
Space
Service
Space
4xingscrews
forcontrolbox
Service
space Service
space
Service
space
Min. 100
Min. 100
Min.500
NOTE:
Makesurethatthexingscrewsandwallhave
su󰀩cientstrengthtohangthecontrolbox.