HITACHI RAS-DX18HNK Split-Unit Air Conditioner Installation Guide
- October 28, 2023
- Hitachi
Table of Contents
RAS-DX18HNK Split-Unit Air Conditioner
RAS-DX18HNK + RAC-DX18HNK
1 2.3m
1.5
0.15m
1.2m
: 1m
R410A R410A
10
Sleep
F.Wash Right/Left Silent
8
15m
200mm
3mm IEC
1
2
ø 65mm
2~5mm
“”
þ ÿ
5mm
15cm
15cm
3
12.7(1/2″)
6.35(1/4″) 12.7(1/2″) 6.35(1/4″) 12.7(1/2″)
44.1-53.99(450~550) 29.4-34.3(300~350)
1 2(N) 3
1 2(N) 3
10mm AC1 2(N)
2(N)
‘
‘
‘
‘ b
‘
‘
· ‘ · ‘b
2(N)
TEMPORARY SWITCH
25A
5
TEMPORARY SWITCH
24125B2021.11V1
INDOOR UNIT INDOOR UNIT
15m
RAS-DX18HNK + RAC-DX18HNK
Selecting the installation location: Suitable location that will reduce the impact from rain and direct sun that may affect the unit performance. Besides, ventilation must be good and clear of obstruction.
0.15m
1.2m
10
Sleep
F.Wash Right/Left Silent
PurifyingFilter
8
Direction of Piping Horizontally backward
Piping configuration may be in six differentdirections: directrearpiping,
leftorright downward pipingandleft orrightsidewayspiping.
200mm
1 Installation of Mounting Plate, Wall Penetration and Installation of
Protection Pipe
CAUITON
Thedrainhosecanbeinstalledfromthelefeorrightoftheindoorunit.Wheninstalling
theindoorunit,the mountingboardmustbefixedhorizontallyorslightlytilteddown
towardsthesideofdrainhose.Ifitistilted abovethesideofthedrainhose,condensed
watermayoverflow.
Direct Mounting On The Wall
Please use hidden beams in the wall to hold the mounting plate.
Wall hole
Wall hole
6
2 Installation of the Indoor Unit
VERTICALLY DOWNWARD PIPING
Preparation
Connect power cord. Pulloutthepipe,powercordanddrainhose.
Installation
Powerline,pipeand drainhosemustbe tiedtogetherwith plastictape.
The upper part of the indoor unit is hanged on the mounting plate.
Theprojectionatthelowerpartoftheindoor unit is hooked onto the mounting plate.
MountingPlate
Coolantpipe
Protection Pipe DrainHose PowerCord
Liftthebody oftheunit upwardsand thenforce itdownwards.
HORIZONTAL PIPING
Projection
Mounting Plate
Hook
CAUITON
Pleasepullthelowerpart of the indoor unit outwards to check if the unit is
hooked onto the mountingplate.Improper installation may cause vibration and
noise.
Preparation
Change of Drain Hose and Installation Procedures.
Exchange the location of drain hose and drain cap during horizontal piping as
shown
infigurebelow.Besuretopluginthedrainhoseuntiltheinsulatingmaterialfoldsupon
itself.
INSTALLATION OF COOLANT PIPES AFTER CONNECTION
The coolant pipes should be adjusted to fit into the holeonthewallandthenreadyforfurtherconnection. Theterminalsof2connectedpipesmustbecovered with insulator used for terminal connection. Connect the power cord. After adjustment, fit the power cord and pipes into the space available under the indoor unit.
Drainhose
Pipe
Powercord
CAUITON
The rubber strap used for fixing the insulator should notbetiedwithgreatforce.
Otherwise,thiswilldamage heatinsulationandcauses water condensation.
Pipe
Pipe
Rubberstraptiedwithgreatforce
THE CONNECTION OF COOLANT PIPE DURING THE INSTALLATION OF INDOOR UNIT
Preparation To Install Coolant Pipes
Coolantpipesandpowercordmustbetiedtogether. The front part of the coolant
pipes are at locations marked with ” ” symbol.
Matchtheendoftherefrigeratingpipeswiththe locationsmarkedwith” “symbol.
CAUITON
Please fix in the plastic core after flaring to avoid plastic chips entering
the pipes.
Procedures of Installation and Precautions
Procedures to fix the mounting plate. 1. Drill holes on wall.
(As shown below)
Please use pliers to pull out the drain cap. (Thisisaneasierwaytoremovethedraincap).
Draincap
Remove the cap for drain hose installation
Draincap Pleaseinsert untilhere
Drainhose
Drainhose Pleaseinsert untilhere
Pleasebendatasmall radiustoformanarc
below 5mm
Installation
Temporarystand
Hangtheindoorunitontothemountingplate.Usethetemporary
standatthebackoftheindoorunittopushitslowerpart15cm Projection forwards.
Place the drain hose through the hole on the wall.
Insulatetheconnectingportionofcoolantpipewithinsulator. Connect the power
cord. Afteradjustment,thepowercordandcoolantpipesareplaced into the space
available under the indoor unit. The projection of indoor unit must hook to
the mounting plate.
Hook about15cm
Heatinsulation pipe
Coolantpipes Powercord
Pull this to the front duringtheconnection of coolant pipes to ease task.
Protection pipe
Drain hose Powercord
Connected terminals ofcoolant pipes
3 Installation of Drain Hose
Wall Penetration and Installation of Protection Pipe
Drill a ø 65mm hole on wall
which is slightly tilted towards the outdoor side. Drillthewallatasmallangle. Cut the protection pipe according to the wall thickness. Empty gap in the sleeve of protection pipe should be completelysealedwithputty to avoid dripping of rain water into the room.
Indoor
Outdoor 2~5mm
WALL
Sealwith putty
Protection pipe
Sleeveof protection pipe
CAUITON
Besurethatthewireisnot in contact with any metal inthewall.Pleaseusethe
protection pipe as wire passingthroughthehollow part of the wall so as to
prevent the possibility of damaged by mouse.
CAUITON Condensed water may leak out if not inserted properly.
HORIZONTAL & DOWNWARD PIPING MAKING OPENINGS
During horizontal or downward piping, use a knife to cut openings as shown in
figure. Then smoothen the edges of openings with a file.
Pipe support
Pullupthepipeafter bendingdownward
Transformthepipingwhileholdingdownthelowerportion of pipe-support by hand.
CAUITON
Bending upwards
Stagment water
Drain
Stagment water
Be sure that the drain hose is not looselyconnected or bent.
You are free to choose the side (left or right) for the installation of drain hose. Please ensure the smooth flow of condensed water of the indoor CAUTION unit during installation. (Carelessness may result in water leakage.)
Caution
Metershowingpressure
12.7(1/2″)
Loosenthespindleoftheservicevalvewith smalldiameterby1/4turnandtightenthe spindleimmediatelyafter1to2seconds. Removethecharginghosefromtheservice valve.
Outerdiameter ofp pei(ø)
T (kgf cm)
Smalldiameterside Largediameterside Vh eaalvde Smalldiameterside c ap
Largediameterside
Valvecorecap
6.35(1/4″) 12.7(1/2″) 6.35(1/4″) 12.7(1/2”)
44.1-53.99(450~550) 29.4-34.3(300~350)
1 2(N) 3
1 2(N) 3
1 2(N)
wires 2(N)
25A
Wiringforthehorizontalpipingfromtherightside.
Securelyscrewinthepowercordandconnectingcordsothatitwill notgetlooseordisconnect. Tighteningtorquereferencevalue:1.2to1.6N·m(12to16kgf·cm) Excessivetighteningmaydamagetheinteriorofthecordrequiring replacement.
Cable
Pipe
Nottointerferewiththe drainhose,foldthecableat thedrainhosesideofthe electricboxasshowninthe leftfigure,andpassthe cablejustovertheelectric boxandpullitout.
Whenputtingtwoconnectingcords
throughtheband.
Screw
Insulatingplate
Cordband
Power cord
Electricbox
Drain hose
Formthecableproperlysothatthe
lowcoverwon ‘ttouchthecablein
installation.
Pipinganddrainhoselayout
Cable
Pipe Drain Powercord
2(N)
Connectingcord
WARNING
After wiring the indoor unit, makesureto reattachtheterminalcover.
ForwireconnectionoftheIndoorunit,youneedto
removethefrontcover,thelowcoverunderthebody oftheunitandterminalcover.
Removethecoverfromtheterminalbaseandscrew thecable.
Terminalcover Screw
Terminalcover Screw
Terminalcover Screw
Terminal cover
Terminalcover
5&.103″3: 48*5$)
Force-cooling operation
Whenthetemporaryswitchoftheindoorunitispressedfor morethan5seconds,theforce-
coolingoperationstarts. Use this mode when performing the failure diagnosis or
collectingrefrigerantintotheoutdoorunit.
TheTimerlampflasheswhenforce-coolingisinoperation.
Pressthetemporaryswitchagainorusetheremotecontroller
to stop the force-cooling operation once this operation is completed.
CAUTION Do not operate the unit for more than 5 minutes while the spindle of
the service valve is closed.
Temporaryswitch (Force-cooling operation starts when the
switchispressedformorethan5seconds. Presstheswitchagainandusetheremote
controllertostoptheoperation.)
5&.103″3: 48*5$)
24125B2021.11V1