Daikin DX17VSS series User manual

INSTALLATION INSTRUCTIONS
AIR CONDITIONER
DX17VSS AIR CONDITIONING
INSTALLATION & SERVICE REFERENCE
Index
Important Safety InStructIonS............................................. 1
ShIppIng InSpectIon .............................................................. 1
codeS & regulatIonS .......................................................... 2
featureS.............................................................................. 2
Before InStallatIon ............................................................. 2
precautIonS for SelectIng alocatIon................................. 2
precautIonS for InStallatIon ............................................... 3
InStallatIon clearanceS ...................................................... 3
rooftop InStallatIonS ......................................................... 3
electrIcal noISe ................................................................. 4
Safety conSIderatIonS......................................................... 4
refrIgerant lIneS ............................................................... 6
refrIgerant lIne connectIonS............................................. 8
leak teStIng (nItrogen or nItrogen-traced) ...................... 8
SyStem Start-up procedure ................................................ 9
Start-up procedure detaIl.................................................. 9
electrIcal connectIonS ...................................................... 9
calculate refrIgerant charge BaSed on lIne Set length ... 12
connect aIr condItIoner to SyStem .................................. 13
SyStem Start-up teSt (IncaSe of ctk04) ........................ 14
Set thermoStat to charge mode (IncaSe of ctk04) ... 17
adjuSt refrIgerant level ................................................. 20
meaSure SuBcoolIng to verIfy proper charge ................. 20
fIeld SelectaBle BooSt mode (IncaSe of ctk04) ........... 21
dehumIdIfIcatIon (IncaSe of ctk04)................................. 24
nIght mode (IncaSe of ctk04)........................................ 25
comfortnet™ SyStem....................................................... 28
aIr condItIoner advanced feature menu........................... 30
WIrIng dIagram ................................................................ 33
teStIng capacItor reSIStance ............................................ 34
coolIng analySIS chart .................................................... 35
trouBleShootIng ............................................................... 36
SettIng the mode dISplay.................................................. 41
7-Segment dISplay............................................................. 47
aIr condItIonIng homeoWner’SroutIne maIntenance
recommendatIonS ........................................................ 49
Start upchecklISt ........................................................... 50
Important Safety InStructIonS
The following symbols and labels are used throughout this
manual to indicate immediate or potential safety hazards. It is
the owner’s and installer’s responsibility to read and comply
with all safety information and instructions accompanying
these symbols. Failure to heed safety information increases
the risk of personal injury, property damage, and/or product
damage.
WARNING
HIGH VOLTAGE !
dISconnect all poWer Before ServIcIng.
multIple poWer SourceS may Be preSent. faIlure
to do So may cauSe property damage, perSonal
Injury or death.
WARNING
only perSonnel that have Been traIned to InStall, adjuSt, Ser-
vIce or repaIr (hereInafter, “ServIce”) the equIpment SpecIfIed
In thIS manual Should ServIce the equIpment. the manufacturer
WIll not Be reSponSIBle for any Injury or property damage arIS-
Ing from Improper ServIce or ServIce procedureS. Ifyou ServIce
thIS unIt, you aSSume reSponSIBIlIty for any Injury or property
damage WhIch may reSult. InaddItIon, In jurISdIctIonS that re-
quIre one or more lIcenSeS to ServIce the equIpment SpecIfIed In
thIS manual, only lIcenSed perSonnel Should ServIce the equIp-
ment. Improper InStallatIon, adjuStment, ServIcIng or repaIr of
the equIpment SpecIfIed In thIS manual, or attemptIng to InStall,
adjuSt, ServIce or repaIr the equIpment SpecIfIed In thIS manual
WIthout proper traInIng may reSult In product damage, property
damage, perSonal Injury or death.
CAUTION
donot WaSh the aIr condItIoner WIth exceSSIve Water. anelec-
trIc Shock or fIre could reSult.
ShIppIng InSpectIon
Always keep the unit upright; laying the unit on its side or top
may cause equipment damage. Shipping damage, and sub-
sequent investigation is the responsibility of the carrier.Verify
the model number, specications, electrical characteristics,
and accessories are correct prior to installation.The distributor
or manufacturer will not accept claims from dealers for trans-
portation damage or installation of incorrectly shipped units.
English
Français
Español

2
codeS & regulatIonS
This product is designed and manufactured to comply with
national codes. Installation in accordance with such codes
and/or prevailing local codes/regulations is the responsibility
of the installer. The manufacturer assumes no responsibility
for equipment installed in violation of any codes or regulations.
Rated performance is achieved after 72 hours of operation.
Rated performance is delivered at the specied airow. See
outdoor unit specication sheet for split system models or
product specication sheet for packaged and light commercial
models. Specication sheets can be found at www.daikin-
comfort.com for Daikin products. Within the website, please
select the products menu and then select the submenu for
the type of product to be installed, such as air conditioners,
to access a list of product pages that each contain links to
that model’s specication sheet.
The United States Environmental Protection Agency
(EPA) has issued various regulations regarding the in-
troduction and disposal of refrigerants. Failure to follow
these regulations may harm the environment and can
lead to the imposition of substantial nes.
Should you have any questions please contact our local EPA
ofce.
If replacing one of the component of the system, the system
must be manufacturer approved and Air Conditioning, Heating
and Refrigeration Institute (AHRI) matched.
NOTE: The installation of an inverter air conditioner with
unmatched system units will not allow for proper operation.
Inverter a/c modelS can only Be matched WIth acape** and
chpe** a-coIl. damage reSultIng from operatIon WIth any other
comBInatIon IS not covered By our WarrantIeS.
NOTICE
Outdoor inverter units are approved for operation above 0°F
in cooling mode with no additional kit necessary.
Damage resulting from operation of the unit in a structure
that is not complete (either as part of new construction or
renovation) is not covered by our warranties.
featureS
This air conditioner is part of a system that uses inverter
technology to more efciently remove heat and achieve the
target cooling setting. System may ONLY be installed using a
ComfortNet™ thermostat or a Daikin approved communicat-
ing thermostat. The ComfortNet system reduces the number
of required thermostat wires, provides additional setup fea-
tures and enhanced active diagnostics. Due to components
using inverter technology, the air conditioner will not function
properly if used with non-approved thermostat.
Should uSe adaIkIn approved communIcatIng thermoStat.
NOTICE
Before InStallatIon
Precautions to remove packaging (Corner guard)
• Remove the packaging
(Corner guard) used to protect
the unit while carrying from the
right front part.
Follow the steps below to remove.
1. Remove the front plate screw.
2. Remove the packaging (Corner
guard).
3. Install the front plate screw to x the front and top
plates.
About carrying
Hold the 2 handles at both sides as shown in the gure below
and move it slowly.
(Pay attention not to touch the ns at the back.)
Conner
Outdoor unit
Handles
(Front) (Back)
Inlet holes
Exhaust grille
NOTE: Don’t place your ngers into the inlet holes of the
casing while moving the unit. Failure to do so may result in
deformation. Only hold the corner of the unit with your hands.
precautIonS for SelectIng alocatIon
1. Choose a place solid enough to bear the weight and
vibration of the unit, where the operating sound will
not be amplied.
2. Choose a location where the hot air discharged
from the unit or the operating sound will not cause a
nuisance to the neighbours of the user.
3. Avoid places near a bedroom and the like, so that the
operating sound will cause no trouble.
4. There must be sufcient spaces for carrying the unit
into and out of the site.
5. There must be sufcient space for air passage and no
obstructions around the air inlet and the air outlet.
6. The site must be free from the possibility of ammable
gas leakage in a nearby place.
7. Do not install the air conditioner in the following
locations:
(a) Where a mineral oil mist or oil spray or vapor is produced,
for example, in a kitchen.
Plastic parts may deteriorate and fall off and thus may
result in water leakage.
(b) Where corrosive gas, such as sulfurous acid gas, is pro-
duced.
Corroding copper pipes or soldered parts may result in
refrigerant leakage.
(c) Near machinery emitting electromagnetic waves.
Electromagnetic waves may disturb the operation of the
control system and cause the unit to malfunction.
Packaging (pallet)
Front plate
Front plate
screw
Top
plate
Packaging (Corner guard)

3
English
(d) Where ammable gas may leak, where there is carbon -
ber, or ignitable dust suspension in the air, or where vola-
tile ammables such as thinner or gasoline are handled.
Operating the unit in such conditions may result in a re.
NOTE: Cannot be installed suspended from ceiling or stacked.
CAUTION
When operatIng the aIr condItIoner In
aloW outdoor amBIent temperature,
Be Sure to folloW the InStructIonS
deScrIBed BeloW.
•toprevent expoSure to WInd, InStall
the outdoor unIt WIth ItS SuctIon
SIde facIng the Wall.
•never InStall the outdoor unIt at a
SIte Where the SuctIon SIde may Be
expoSed dIrectly to WInd.
•toprevent expoSure to WInd, It IS
recommended to InStall aBaffle
plate on the aIr dIScharge SIde of
the outdoor unIt.
•Inheavy SnoWfall areaS, Select an
InStallatIon SIte Where the SnoW
WIll not affect the unIt.
• Construct a large
canopy.
• Construct a pedestal.
Install the unit high
enough off the ground
to prevent burying in
snow.
precautIonS for InStallatIon
• Check the strength and level of the installation ground
so that the unit will not cause any operating vibration or
noise after installed.
• Fix the unit securely by means of the foundation bolts.
(Prepare 4 sets of 1/2” foundation bolts, nuts and wash-
ers; all separately available.)
• It is best to screw in the foundation bolts until their ends
are 1 inch from the foundation surface.
1”
InStallatIon clearanceS
• Where a wall or other obstacle is in the path of the out-
door unit’s intake or exhaust airow, follow the installation
space requirements below.
• For any of the below installation patterns, the wall height
on the outlet side should be 47” or less.
Wall facing one side
More than 4” More than 20”
Direction
of air 47” or
less
Side view
Walls facing two sides
More than 4” More than 4”
More
than 20”
More
than 4”
More
than 4” More than 20”
Top view
More
than 40”
More than 8”
More than 12”
More than 12”
More than 40”
More than 4”
More than 4”
Top view
Walls facing three sides
More than 4”
More than 4”
More than 20”
Top view
unit: inch
This unit can be located at ground oor level or on at roofs.
At ground oor level, the unit must be on a solid, level foun-
dation that will not shift or settle. To reduce the possibility
of sound transmission, the foundation slab should not be in
contact with or be an integral part of the building foundation.
Care should be taken to ensure the unit is installed away
from noise sensitive locations such as bedrooms, windows
and outdoor living areas. Ensure the foundation is sufcient
to support the unit.A concrete slab raised above ground level
provides a suitable base.
rooftop InStallatIonS
If it is necessary to install this unit on a roof structure, ensure
the roof structure can support the weight and that proper
consideration is given to the weather-tight integrity of the roof.
Since the unit can vibrate during operation, sound vibration
transmission should be considered when installing the unit.
Vibration absorbing pads or springs can be installed between
the air conditioner unit legs or frame and the roof mounting
assembly to reduce noise vibration.

4
electrIcal noISe
The unit should be well grounded so that potential effects of
electrical noise from the inverter to surrounding equipment
can be minimized.
When selecting an installation location, keep sufcient dis-
tance from the air conditioner unit and wiring to radios, per-
sonal computers, stereos, uorescent lamp, etc., as shown
in the following gure.
Radio, TV
60” or more
60” or more
unit: inch
Circuit
Breaker
High voltage
power cable
To Indoor Unit and
Thermostat
Placement to Minimize Electronic Noise
Safety conSIderatIonS
Read these Safety considerations for Installation carefully
before installing an air conditioner. After completing the instal-
lation, make sure that the unit operates properly during the
system start-up operation.
Instruct the customer on how to operate and maintain the unit.
Inform customers that they should store this Installation
Manual for future reference.
Always use a licensed installer or contractor to install this
product.
Improper installation can result in water or refrigerant leakage,
electrical shock, re, or explosion.
Meanings of WARNING, CAUTION, and NOTICE
Symbols:
WARNING ....... Indicates imminently or potentially
hazardous situation which, if not
avoided, will result in death or seri-
ous injury.
CAUTION ........ Indicates a potentially hazardous
situation which, if not avoided, may
result in minor or moderate injury. It
may also be used to alert against
unsafe practices.
NOTICE ......... Indicates situations that may result
in equipment or property-damage
accidents only.
While these items will not cover every conceivable situation,
they should serve as a useful guide.
WARNING
toavoId poSSIBle Injury, exploSIon or death, practIce Safe
handlIng of refrIgerantS.
WARNING
refrIgerantS are heavIer than aIr. they can “puSh out” the
oxygen In your lungS or In any encloSed Space. toavoId poS-
SIBle dIffIculty In BreathIng or death:
•never purge refrIgerant Into an encloSed room or Space. By
laW, all refrIgerantS muSt Be reclaImed.
•Ifan Indoor leak IS SuSpected, thoroughly ventIlate the area
Before BegInnIng Work.
•lIquId refrIgerant can Be very cold. toavoId poSSIBle froSt
BIte or BlIndneSS, avoId contact and Wear gloveS and goggleS.
IflIquId refrIgerant doeS contact your SkIn or eyeS, Seek
medIcal help ImmedIately.
•IfrefrIgerant gaS leakS durIng InStallatIon, ventIlate the
area ImmedIately. refrIgerant gaS WIll reSult In producIng
toxIc gaS If It comeS Into contact WIth fIre. expoSure to thIS
gaS WIll reSult In Severe Injury or death.
•after completIng the InStallatIon Work, check that the re-
frIgerant gaS doeS not leak throughout the SyStem.
•donot InStall unIt In an area Where flammaBle materIalS are
preSent due to rISk of exploSIonS that WIll reSult In SerIouS
Injury or death.
•When InStallIng the unIt In aSmall room, take meaSureS to
keep the refrIgerant concentratIon from exceedIng alloWaBle
Safety lImItS. exceSSIve refrIgerant leakS, In the event of an
accIdent In acloSed amBIent Space, could reSult In oxygen
defIcIency.
•alWayS folloW epa regulatIonS. never Burn refrIgerant, aS
poISonouS gaS WIll Be produced.
WARNING
toavoId poSSIBle exploSIon, uSe only returnaBle (not dISpoS-
aBle) ServIce cylInderS When removIng refrIgerant from a
SyStem.
•enSure the cylInder IS free of damage WhIch could lead to a
leak or exploSIon.
•enSure the hydroStatIc teSt date doeS not exceed 5 yearS.
•enSure the preSSure ratIng meetS or exceedS 400 pSIg.
When In douBt, do not uSe cylInder.

5
English
WARNING
toavoId poSSIBle exploSIon:
•never apply flame or Steam to arefrIgerant cylInder. Ifyou
muSt heat acylInder for faSter chargIng, partIally ImmerSe It
In Warm Water.
•never fIll acylInder more than 80% full of lIquId refrIger-
ant.
•never add anythIng other than r-410a to areturnaBle r-
410a cylInder. the ServIce equIpment uSed muSt Be lISted or
certIfIed for the type of refrIgerant uSe.
•Store cylInderS In acool, dry place. never uSe acylInder aS
aplatform or aroller.
CAUTION
•refrIgerant r410a In the SyStem muSt Be kept clean, dry, and
tIght.
(a) clean and dry - foreIgn materIalS (IncludIng mIneral oIlS
Such aS SunISo oIl or moISture) Should Be prevented
from gettIng Into the SyStem.
(b) tIght - r410a doeS not contaIn any chlorIne, doeS not
deStroy the ozone layer, and doeS not reduce the earth’S
protectIon agaIn harmful ultravIolet radIatIon. r410a
can contrIBute to the greenhouSe effect If It IS releaSed.
therefore take proper meaSureS to check for the tIght-
neSS of the refrIgerant pIpIng InStallatIon. read the chap-
ter refrIgerant pIpIng and folloW the procedureS.
•SInce r410a IS aBlend, the requIred addItIonal refrIger-
ant muSt Be charged In ItS lIquId State. Ifthe refrIgerant IS
charged In aState of gaS, ItS compoSItIon can change and the
SyStem WIll not Work properly.
WARNING
•donot ground unItS to Water pIpeS, SuctIon lIne, telephone
WIreS, or lIghtnIng rodS aS Incomplete groundIng WIll reSult a
Severe Shock hazard reSultIng In Severe Injury or death. ad-
dItIonally, groundIng to gaS pIpeS WIll reSult agaS leak and
potentIal exploSIon reSultIng In Severe Injury or death.
•Safely dISpoSe all packIng and tranSportatIon materIalS In ac-
cordance WIth federal/State/local laWS or ordInanceS. pack-
Ing materIalS Such aS naIlS and other metal or Wood partS,
IncludIng plaStIc packIng materIalS uSed for tranSportatIon
WIll reSult In InjurIeS or death By SuffocatIon.
•only qualIfIed perSonnel muSt carry out the InStallatIon
Work. InStallatIon muSt Be done In accordance WIth thIS
InStallatIon manual. Improper InStallatIon could reSult In
Water leakage, electrIc Shock, or fIre.
•uSe only SpecIfIed acceSSorIeS and partS for InStallatIon
Work. faIlure to uSe SpecIfIed partS could reSult In Water
leakage, electrIc ShockS, fIre, or the unIt fallIng.
•InStall the aIr condItIoner on afoundatIon Strong enough
that It can WIthStand the WeIght of the unIt. a foundatIon of
InSuffIcIent Strength could reSult In the unIt fallIng and cauS-
Ing InjurIeS.
•take Into account Strong WIndS, typhoonS, or earthquakeS
When InStallIng. Improper InStallatIon could reSult In the unIt
fallIng and cauSIng accIdentS.
•make Sure that aSeparate poWer Supply cIrcuIt IS provIded
for thIS unIt and that all electrIcal Work IS carrIed out
By qualIfIed perSonnel accordIng to local, State and na-
tIonal regulatIonS. anInSuffIcIent poWer Supply capacIty or
Improper electrIcal conStructIon could reSult In electrIc
ShockS or fIre.
•make Sure that all WIrIng IS Secured, that SpecIfIed WIreS are
uSed, and that no external forceS act on the termInal con-
nectIonS or WIreS. Improper connectIonS or InStallatIon could
reSult In fIre.
•When WIrIng, poSItIon the WIreS So that the SIde plate WhIch
coverS termInal Block of poWer caBle can Be Securely faS-
tened. Improper poSItIonIng of the SIde plate could reSult In
electrIc ShockS, fIre, or the termInalS overheatIng.
•thIS equIpment can Be InStalled WIth aground-fault cIrcuIt
Interrupter (gfcI). although thIS IS arecognIzed meaSure
for addItIonal protectIon, WIth the groundIng SyStem In north
amerIca, adedIcated gfcI IS not neceSSary.
•donot change the SettIng of the protectIon devIceS. Ifthe
preSSure SWItch, thermal SWItch, or other protectIon devIce
IS Shorted and operated forcIBly, or partS other than thoSe
SpecIfIed By daIkIn are uSed, fIre or exploSIon could reSult.

6
CAUTION
•donot touch the SWItch WIth Wet fIngerS. touchIng aSWItch
WIth Wet fIngerS may reSult In electrIc Shock.
•donot alloW chIldren to play on or around the unIt or It may
reSult In Injury.
•the heat exchanger fInS are Sharp enough to cut, and may
reSult In Injury If Improperly uSed. toavoId Injury Wear glove
or cover the fInS When WorkIng around them.
•donot touch the refrIgerant pIpeS durIng and ImmedIately
after operatIon aS the refrIgerant pIpeS may Be hot or cold,
dependIng on the condItIon of the refrIgerant floWIng through
the refrIgerant pIpIng, compreSSor, and other refrIgerant
cycle partS. Itmay reSult In your handS gettIng BurnS or
froStBIte If you touch the refrIgerant pIpeS. toavoId Injury,
gIve the pIpeS tIme to return to normal temperature or, If you
muSt touch them, Be Sure to Wear proper gloveS.
•InSulate SuctIon pIpIng to prevent condenSatIon.
•Becareful When tranSportIng the product.
•take adequate meaSureS to prevent the outdoor unIt from
BeIng uSed aS aShelter By Small anImalS. Small anImalS mak-
Ing contact WIth electrIcal partS may reSult In malfunctIonS,
Smoke, or fIre. InStruct the cuStomer to keep the area around
the unIt clean.
•Ifthe conventIonal refrIgerant and refrIgerator oIl are mIxed
In r410a, deterIoratIon WIll reSult.
•thIS aIr condItIoner IS an applIance that Should not Be acceS-
SIBle to the general puBlIc.
•aSdeSIgn preSSure IS 450 pSI (3.1 mpa), the Wall thIckneSS
of fIeld-InStalled pIpeS Should Be Selected In accordance WIth
the relevant local, State, and natIonal regulatIonS.
NOTICE
refrIgerant lIneS
CAUTION
the compreSSor pve oIl for r-410a unItS IS extremely SuS-
ceptIBle to moISture aBSorptIon and could cauSe compreSSor
faIlure. donot leave SyStem open to atmoSphere any longer
than neceSSary for InStallatIon.
Use only refrigerant grade (dehydrated and sealed) copper
tubing to connect the air conditioner with the indoor evapora-
tor. After cutting the tubing, install plugs to keep refrigerant
tubing clean and dry prior to and during installation. Tubing
should always be cut square keeping ends round and free
from burrs. Clean the tubing to prevent contamination. The
liquid line must be insulated if more than 50 ft.of liquid line will
pass through an area that may reach temperatures of 30°F
or higher than outdoor ambient. Never attach a liquid line to
any uninsulated portion of the suction line.
Do NOT let refrigerant lines come in direct contact with plumb-
ing, ductwork, oor joists, wall studs, oors, and walls. When
running refrigerant lines through a foundation or wall, open-
ings should allow for sound and vibration absorbing material
to be placed or installed between tubing and foundation. Any
gap between foundation or wall and refrigerant lines should
be lled with a pliable silicon-based caulk, RTV or a vibration
damping material. Avoid suspending refrigerant tubing from
joists and studs with rigid wire or straps that would come in
contact with the tubing. Use an insulated or suspension type
hanger. Keep both lines separate and always insulate the
suction line.
Insulation is necessary to prevent condensation from forming
and dropping from the suction line. Insulation tube with 3/8”
min. wall thickness is recommended. In severe conditions
(likely to exceed 86°F and a relative humidity of 80%) 1/2”
insulation may be required. Insulation must be installed in a
manner which protects tubing and connections from damage
and contamination.
Please use a HVAC ushing solvent to clean lineset of any
oil or debris from the existing system.
NOTE: If changing refrigerant, the indoor coil and metering
device must be replaced.
Cond Unit
Tons
Allowable line set diameter
Liquid Suction
3/8 7/8 1 1/8
3.5 x x x
4 x x x
5 x x x
x: Allowable combination

77
EnglishEnglish
Condenser BELOW Evaporator
Mounting the evaporator coil above the
air conditioner will require an inverted loop
in the suction line adjacent or near the
connection to the evaporator.
The top of the loop must be slightly higher
than the top of the coil. The trap can prevent
liquid compression of the compressor for
start- up period.
Maximum
vertical
elevation
of 90 ft.
Maximum line set equivalent length 125 ft*.
The maximum line set actual length is 100 ft.
Liquid Line
Suction Line
*Includes any elbows, bends, etc.
(See page #13 for calculations)
Condenser ABOVE Evaporator
Mounting the air conditioner above the evaporator coil will require an
oil trap that is vertically centered between the air conditioner and
indoor unit the vertical elevation exceeds 80 ft.
The trap can be constructed from standard refrigerant fittings as shown
in the figure (bottom left).
Maximum line set
equivalent length of 125 ft*.
The maximum line set
actual length is 100 ft. Maximum vertical
elevation of 100 ft.
LONG RADIUS
STREET ELL
45°
STREET
ELL
45°
ELL
SHORT RADIUS
STREET ELL
Trap Construction
*Included any elbows, bends, etc.
(See page #13 for calculations)

8
refrIgerant lIne connectIonS
IMPORTANT
To avoid overheating the service valve, sensors, or lter
drier while brazing, wrap the component with a wet rag,
or use a thermal heat trap compound. If using a wet rag
care should be taken to not get water/moisture inside the
tubing as it’s very important to keep moisture out of the
system. Be sure to follow the manufacturer’s instruction
when using the heat trap compound.
Note: Remove Schrader valves from service valves before
brazing tubes to the valves. After brazing is brought up,
use a brazing alloy of 2% minimum silver content. Do not
use ux.
Torch heat required to braze tubes of various sizes is
proportional to the size of the tube. Tubes of smaller size
require less heat to bring the tube to brazing temperature
before adding brazing alloy. Applying too much heat to any
tube can melt the tube. Service personnel must use the
appropriate heat level for the size of the tube being brazed.
NOTE: The use of a heat shield when brazing is recom-
mended to avoid burning the serial plate or the nish on
the unit.
1. The ends of the refrigerant lines must be cut square,
deburred, cleaned, and be round and free from nicks
or dents. Any other condition increases the chance of
a refrigerant leak.
2. Purge with nitrogen at 2 to 3 psig during brazing
to prevent the formation of copper-oxide inside
the refrigerant lines. The PVE oils used in R-410A
applications will clean any copper-oxide present
from the inside of the refrigerant lines and spread it
throughout the system. This may cause a blockage or
failure of the metering device.
3. During and after brazing, quench the joints with water
or a wet cloth to prevent overheating of the service
valve.
4. A bi-ow lter drier is shipped with the unit as a
separate component and must be brazed on by the
installer on-site. Ensure the bi-ow lter drier paint
nish is intact after brazing. If the paint of the steel
lter drier has been burned or chipped, repaint or treat
with a rust inhibitor.
The recommended location of the lter drier is before the
expansion device at the indoor unit.
NOTE: Be careful not to kink or dent refrigerant lines. Kinked
or dented lines will cause poor performance or compressor
damage.
Do NOT make nal refrigerant line connection until plugs
are removed from refrigerant tubing.
Stop Valve
Tighten Torque
Shaft (valve body) Cap (valve cover)
Liquid Line
(3/8”) 5-7 N·m Hex. wrench 4 mm 13.5-16.5 N·m
Suction Line
(7/8”) 19-21 N·m Hex. wrench 8 mm 22.5-27.5 N·m
Service Port
Tighten Torque
Service Port 10.7 – 14.7 N·m
NOTE: Preventing foreign objects from entering.
• Plug the pipe through-holes with accessory set or putty
(eld supply) to cover all gaps.
• Insects or small animals may enter inside of outdoor units
and cause damage to the electrical components.
Putty (field supply) or heat insulating
material (accessory)
leakteStIng (nItrogen or nItrogen-traced)
WARNING
toavoId the rISk of fIre or exploSIon, never uSe oxygen, hIgh
preSSure aIr or flammaBle gaSeS for leak teStIng of arefrIg-
eratIon SyStem.
WARNING
toavoId poSSIBle exploSIon, the lIne from the nItrogen cylInder
muSt Include apreSSure regulator and apreSSure relIef valve.
the preSSure relIef valve muSt Be Set to open at no more than
150 pSIg.
To locate leaks, system pressure test use dry nitrogen or
leak detector uid per Daikin’s recommendation. If you wish
to use a leak detector.
• Charge the system to 10 psi using the appropriate refrig-
erant.
• Use nitrogen to nish charging the system to working
pressure.
• Apply the detector to suspect areas.
If leaks are found, repair them. After repair, repeat the pres-
sure test. If no leaks exist, proceed to System Start-up
Procedure.

9
English
SyStem Start-up procedure
GENERAL NOTES:
Adequate refrigerant charge for the matching indoor coil and
line set is supplied with the air conditioner. If liquid line set
exceeds factory charge length, refrigerant should be added at
0.6 ounce (Liquid line diameter 3/8”) of refrigerant per foot of
liquid line. Refer to pages 11-13 for calculation of refrigerant
charge based on line set length.
vIolatIon of epa regulatIonS may reSult In fIneS or other
penaltIeS.
NOTICE
all unItS Should have ahIgh voltage poWer Supply connected
2 hourS prIor to Startup.
NOTICE
WARNING
refrIgerant under preSSure!
•donot overcharge SyStem WIth refrIgerant.
•donot operate unIt In avacuum or at negatIve preSSure.
faIlure to folloW proper procedureS may cauSe property dam-
age, perSonal Injury or death.
CAUTION
operatIng the compreSSor WIth the SuctIon valve cloSed WIll
cauSe SerIouS compreSSor damage - Such damage IS not covered
By our WarrantIeS.
CAUTION
uSe refrIgerant certIfIed to ahrI StandardS. uSed refrIgerant
may cauSe compreSSor damage, and IS not covered under the
Warranty. moSt portaBle machIneS cannot clean uSed refrIger-
ant to meet ahrI StandardS.
Start-up procedure detaIl
Air conditioner liquid and suction valves are closed to contain
the charge within the unit. The unit is shipped with the valve
stems closed and caps installed. Do not open valves until
the indoor coil and line set is evacuated.
CAUTION
prolonged operatIon at SuctIon preSSureS leSS than 20 pSIg
for more than 5 SecondS WIll reSult In overheatIng of the com-
preSSor and may cauSe permanent damage to It.
1. Connect the vacuum pump with 250 micron capability
to the service valves.
2. Evacuate the system to 500 microns or less using
suction and liquid service valves. Using both valves
is necessary.
3. Close pump valve and hold vacuum for 10 minutes.
Typically pressure will rise during this period.
• If the pressure rises to 500 microns or less and
remains steady the system is considered leak-free;
proceed to start-up.
• If pressure rises above 500 microns moisture and/
or noncondensibles may be present or the system
may have a small leak. Return to step 2: If the same
result is encountered check for leaks as previously
indicated and repair as necessary then repeat
evacuation.
electrIcal connectIonS
WARNING
HIGH VOLTAGE!
dISconnect all poWer Before ServIcIng.
multIple poWer SourceS may Be preSent. faIlure
to do So may cauSe property damage, perSonal
Injury or death due to electrIc Shock. WIrIng muSt
conform WIth nec or cec and all local codeS.
underSIzed WIreS could cauSe poor equIpment
performance, equIpment damage or fIre.
WARNING
toavoId the rISk of fIre or equIpment damage, uSe copper
conductorS.
CAUTION
groundIng requIred!
alWayS InSpect and uSe proper ServIce toolS. lack of InSpec-
tIon or Improper toolS may cauSe equIpment damage or perSonal
Injury. all dISconnected groundIng devIceS muSt Be recon-
nected Before InStallIng or ServIcIng. multIple componentS of
thIS unIt may conduct electrIcal current; theSe are grounded.
IfServIcIng the unIt, any dISconnectIon of groundIng WIreS,
ScreWS, StrapS, clIpS, nutS or WaSherS uSed to complete the
ground muSt Be returned to theIr orIgInal poSItIon and prop-
erly faStened.

10
•never InStall aphaSe-advancIng capacItor. aSthIS unIt IS
equIpped WIth an Inverter, InStallIng aphaSe-advancIng capacI-
tor WIll not only deterIorate poWer factor Improvement ef-
fect, But alSo may cauSe capacItor aBnormal heatIng accIdent
due to hIgh-frequency WaveS.
•donot change the SettIng of the protectIon devIceS. Ifthe
preSSure SWItch, thermal SWItch, or other protectIon devIce
IS Shorted and operated forcIBly, or partS other than thoSe
SpecIfIed By daIkIn are uSed, fIre or exploSIon could reSult.
•donot connect the ground WIre to SuctIon lIne, SeWage pIpeS,
lIghtnIng rodS, or telephone ground WIreS.
NOTICE
The air conditioner rating plate lists pertinent electrical data
necessary for proper electrical service and overcurrent protec-
tion. Wires should be sized to limit voltage drop to 2% (max.)
from the main breaker or fuse panel to the air conditioner.
Consult the NEC, CEC, and all local codes to determine the
correct wire gauge and length.
Local codes often require a disconnect switch located near
the unit; do not install the switch on the unit.
overcurrent protectIon
The inverter control system software provides sufcient time
delay to protect from overcurrent conditions and permit the
compressor and fan motors to adjust their rotational speed.
hIgh voltage connectIonS
Route power supply and ground wires through the high volt-
age port and terminate in accordance with the wiring diagram.
CAUTION
•Before connectIng the WIrIng to the termInal Block, remove
the ShIeldIng plate. and take It Back after WorkIng.
•precautIonS to Be taken for poWer Supply WIrIng.
When uSIng Stranded WIreS, make Sure to uSe around crImp-
Style termInal for connectIon to the poWer Supply termInal
Block.
place the round crImp-Style termInalS on the WIreS up to the
covered part and Secure In place.
Round crimp-style
terminal
Stranded wire
Cup washer
Good
Cup washer
Cup washer
Screw
Screw
Screw
Round
crimp-style
terminal
Round crimp-
style terminal
Round crimp-
style terminal
A
Wrong
Arrow view A
Notch side
•When connectIng the connectIon WIreS to the termInal Block
uSIng aSIngle core WIre, Be Sure to curl the end of the lead.
Improper Work may cauSe heat and fIreS.
Good Wrong
Good Wrong
Excessive strip length
may cause electric shock
or current leakage.
Strip wire end
to this point.
•uSe the folloWIng method When InStallIng aSIngle core WIre.
Cup
washer
Screw
A single core wire A single core wire
BArrow view B
• Make sure to apply the rated voltage of 208/230V for the
unit.
• A power circuit (see the following table) must be provided
for connection of the unit. This circuit must be protected
with the required safety devices.
• When using residual current operated circuit breakers, be
sure to use a high-speed type (0.1 seconds or less) 200
mA rated residual operating current.
• Use copper conductors only.
• Use insulated wire for the power cord.
• Select the power supply cable type and size in accor-
dance with relevant local and national regulations.

1111
EnglishEnglish
MODEL NAME Phase and fre-
quency Voltage
MCA
(Min.
circuit
amp.)
MOP
(Max.
overcur-
rent
protective
device)
Transmis-
sion line
selection
DX17VSS421AA 1 Phase
60Hz 208/230V
34.0 A 35 A 18 AWG
(typical)
DX17VSS481AA 34.0 A 35 A
DX17VSS601AA 35.5 A 40 A
loW voltage connectIonS
The unit is designed to work as part of a fully communicating
HVAC system, utilizing a ComfortNet™ thermostat, Comfort-
Net compatible indoor unit, and up to four wires.Route control
wires through the low voltage port and terminate in accor-
dance with the wiring diagram provided inside the top plate.
Tie high voltage wire and
ground wire with clamp
material (accessory)
GROUND
WIRE
HIGH
VOLTAGE
WIRE
LOW
VOLTAGE
WIRE
SHIELDING PLATE
VINYL TUBE
(accessory)
Voltage Ports
NOTE: The communicating thermostat is able to search and
identify the indoor and outdoor units when power is applied to
the system. Refer to the communicating thermostat’s instal-
lation instruction manual for more information.
Connect low voltage communication wires (1, 2) to low volt-
age pigtail provided.
communIcatIon WIrIng
NOTE: A removable plug connector is provided with the
control board to make thermostat wire connections.This plug
may be removed, wire connections made to the plug, and
replaced.Do not connect multiple wires into a single terminal.
Typical 18 AWG wire may be used to wire the system compo-
nents. However, communications reliability may be improved
by using a high quality, shielded, twisted pair cable for the
data transmission lines.
tWo-WIre outdoor, four-WIre Indoor WIrIng
Low voltage wiring consists of two wires between the indoor
unit and air conditioner and four wires between the indoor
unit and thermostat. The required wires are data lines 1 and
2, “R” (24 VAC hot) and “C” (24 VAC common).
Never connect the power wiring to communication terminal.
(1, 2, R, C)
CTK04
Thermostat
CT™ Compable
Gas Furnace or
Modular Blower
Integrated Control Module
CT™ Compable AC
Integrated Control Module
(*) Allowable Maximum Length
(a)+(b)
=125 .(*)
250 .(*)
(a)
(b)
1 2 R C
1 2 R C
1 2 R C
1 2 R C
CT™ Compable
Case Coil
Integrated
Control Module
System Wiring (In case of CTK04)
ATTENTION INSTALLER -
IMPORTANT NOTICE!
Please read carefully before installing this unit.
• For DX17VSS, do NOT install the 24 Volt Transformer
that is included with the CTK04 Thermostat.
• Do not attach any wires to the R & C Terminals on the
Air Conditioner, as they are not needed for inverter
unit.
• Data line terminal #1 from air conditioner must connect
to terminal #1 on indoor unit and thermostat and data
line terminal #2 from air conditioner must connect to
terminal #2 on indoor unit and thermostat. Verify wires
are not reversed.

1212
calculate refrIgerant charge BaSed on lIne Set length
The condenser unit is shipped with a predetermined factory charge level as shown below. For longer line sets greater than
15 ft. (Detail shown in tables on page 12) add 0.6 ounce of refrigerant per foot. Refer to the following page for the equivalent
length of the elbow ttings.
Total Refriger-
ant (A) =Factory Charge (B) +Additional Charge (C) = [For liquid Line (C)-1] – [Adjust amount from suction line (C)-2]
(A) to (C) parameters are calculated/followed below.
(A) There is 2 way calculation for total refrigerant amount
(A)-1 Select line set length from (A)-1 table.
(A)-2 Calculate from above formula by using (B), (C)-1 and (C)-2 factors.
(B) Pick up from name plate which has factory charge amount.
(C) Calculate above formula. (C)-1 and (C)-2 shown below.
Subtract factory charge length (see (A)-1 Table) from the overall length and put the results in ft.
Additional Charge for
liquid line (C)-1 =(3/8” liquid line) ft. x 0.6 oz.
Adjust amount from
suction line (C)-2 =Check the suction line diameter and
pick the adjust amount (oz.)
Charge Table for Total/Additional Refrigerant (A)-1
Actual Line Set Length (ft.) 3.5/4.0 Ton 5.0 Ton
Total refrigerant (oz.)
Liquid Line Diameter (inch) 3/8”
Suction Line Diameter (inch) 1 1/8”
Total/Additional Total Additional Total Additional
15 116 0 139 0
20 119 3 142 3
25 122 6 145 6
30 125 9 148 9
35 128 12 151 12
40 131 15 154 15
45 134 18 157 18
50 137 21 160 21
55 140 24 163 24
60 143 27 166 27
65 146 30 169 30
70 149 33 172 33
75 152 36 175 36
80 155 39 178 39
85 158 42 181 42
90 161 45 184 45
95 164 48 187 48
100 167 51 190 51
Factory Charge

13
English
Charge Table for Adjusting charge from suction pipe size
(C)-2
Actual Line Set
Length (ft.)
3.5-5.0 Ton
Adjust refrigerant (oz.)
Suction Line
Diameter (inch) 7/8” 1 1/8”
12-15 2 –
20-25 4 –
30-40 6 –
40-50 9 –
50-60 11 –
60-70 12 –
70-80 14 –
80-90 16 –
90-100 18 –
connect aIr condItIoner to SyStem
CAUTION
open the lIquId valve fIrSt!
Ifthe SuctIon ServIce valve IS opened fIrSt, oIl from the com-
preSSor may Be draWn Into the Indoor coIl, reStrIctIng refrIger-
ant floW and affectIng operatIon of the SyStem.
CAUTION
poSSIBle refrIgerant leak!
toavoId apoSSIBle refrIgerant leak, open the ServIce valveS
untIl the top of the Stem IS 1/8” from the retaIner.
CAUTION
enSure valveS are open and addItIonal charge IS added per
chart Before applyIng poWer.
Charge additional refrigerant calculated by STEP formula &
table from liquid service valve. (NOT from suction side.)
When opening service valves, open each valve only until the
top of the stem is 1/8” from the valve.To avoid loss of refriger-
ant, DO NOT apply pressure to the retainer. When opening
valves without a retainer, remove service valve cap and insert
a hex wrench into the valve stem and back out the stem by
turning the hex wrench counterclockwise.
After the refrigerant charge has bled into the system, open
the liquid service valve. The service valve cap is the second-
ary seal for the valves and must be properly tightened to
prevent leaks. Make sure cap is clean and apply refrigerant
oil to threads and sealing surface on inside of cap. Tighten
cap nger-tight and then tighten additional 1/6 of a turn to
properly seat the sealing surfaces.
Break vacuum by fully opening liquid and suction base valve.
NOTE: Units have front seating valves. These are not back-
seating valves. It is not necessary to force the stem tightly
against the rolled lip.
equIvalent length calculatIon
NOTE: The following table lists the equivalent length gained
from adding bends to the suction line. Properly size the suc-
tion line to minimize capacity loss.
Type of Elbow Fitting Inside Diameter
3/4 7/8 1 1/8
90° short radius 1.7 2 2.3
90° long radius 1.5 1.7 1.6
45° radius 0.7 0.8 1
unit: inch

1414
SyStem Start-up teSt (IncaSe of ctk04)
onInItIal poWer Start-up, the aIr condItIoner WIll dISplay code
e11, SIgnalIng that InItIal SyStem teSt muSt Be run. folloW
the comfortnet™ Setup Screen to enter applIcatIon-unIque
InformatIon. See comfortnet thermoStat manual for detaIled
InformatIon.
NOTICE
A system test is now required to check the equipment settings
and functionality. Once selected, it checks the equipment for
approximately 10 - 15 minutes. System test may exceed 15
minutes if there is an error. Refer to the Troubleshooting sec-
tion, if error code appears.
Before starting the SYSTEM TEST, turn off the electric heater
or gas furnace.
1. Ensure the thermostat is installed.
2. Apply power to outdoor and indoor units.
3. Start-up.
After the application information is entered,
the initial system test must be run.
The “HOME” screen will be displayed showing
information similar to one of the adjacent screens.
Select “MENU”. Make sure the thermostat is in “OFF” and
select “SYSTEM” menu.Choose “OFF” before “SYSTEM
TEST”.
NOTE:
“SYSTEM TEST” must be run for all installations.
System will not operate without a completed initial
“SYSTEM TEST”.

15
English
4. From the “MENU” screen, scroll down and select
“ComfortNet User Menu”.
5. Enter Installer password. (The password is the Date
Code located on the thermostat and is available
by entering the “EQUIPMENT STATUS” menu and
scrolling to the bottom.)
6. Conrm message, then select “YES” to continue.
7. From the “ComfortNet User Menu”,
select “Outdoor Unit”.

1616
8. Next, scroll down and select “EQUIP TEST”.
9. Select “SYSTEM TEST”.
NOTE: If unit has Error during system test, it may be
under charge.
Please refer “TROUBLESHOOTING” for your
corrective action.
10. Select “ON” to run the “SYSTEM TEST”.
Press “DONE” to initiate test.
11. Allow the system test to run for its duration (10-15
minutes). “EQUIP TEST” screen will show the system
test is “ON” once selected.
System test will operate the air conditioner and the
indoor unit through a series of startup tests.
Please proceed to the next step and allow for startup
tests to complete. Do not interrupt power to air
conditioner, indoor unit, or thermostat during system
test.

1717
EnglishEnglish
12. Press Previous Menu button and navigate to “HOME”
screen and allow test to nish. The display similar to the
one at the right will be displayed after “SYSTEM TEST”
completes. Test is complete only when “CODE 11”
notice clears from BOTH the thermostat display AND
the seven segment LED display on the air conditioner.
Please wait for test to complete and for both codes to
clear.
Set thermoStat to charge mode (In
caSe of ctk04)
If required additional charging amount cannot be charged to
the system without operation, then use this “CHARGE MODE”.
Please follow the following sequence to enter CHARGE
MODE.
When adjusting “Sub cooling” (Refer page 20), use this
“CHARGE MODE”.
CHARGE MODE allows for charging of the system. System
operates for a duration of approximately one hour while the
equipment runs at full capacity. After one hour, the CHARGE
MODE ends and the system resumes normal thermostat
operation.
Before starting the CHARGE MODE, turn off the electric
heater.
1. On the “HOME” screen, select “MENU”.
NOTE: Ensure the thermostat is in OFF. Select
“SYSTEM” menu. Choose “OFF” before “CHARGE
MODE”.
2. From the “MENU” screen, scroll down and select
“ComfortNet User Menu”.

1818
3. Enter Installer password. (The password is the Date
Code located on the thermostat and is available
by entering the “EQUIPMENT STATUS” menu and
scrolling to the bottom).
4. Conrm message, then select “YES” to continue.
5. From the “ComfortNet User Menu”, select “Outdoor
Unit”.
6. From the “Outdoor Unit”, scroll down and select “SYS
SETUP2”.

1919
EnglishEnglish
7. Select “CHARGE MODE”.
8. Select “ON”. Press “DONE” to initiate CHARGE MODE.
If charging is not complete after 1 hour, repeat 7. and 8.
Refer to STEP 5 and STEP 6 for refrigerant charge
level adjustment.
System will then run for 1 hour and either return to
cooling mode.
9. To terminate “CHARGE MODE”, select “CHARGE
MODE” screen again. Press “OFF”. Press “DONE” to
terminate CHARGE MODE.
10. Once CHARGE MODE is complete and has been
terminated, navigate to “HOME” screen. Enter normal
operation with temperature offset or thermostat
schedule, as desired.

20
adjuSt refrIgerant level
Using service equipment, add or recover refrigerant according
to the calculation in Step 1. Allow system to stabilize for 20
minutes after adjusting charge level.
meaSure SuBcoolIng to verIfy proper
charge
If want to adjust charging by checking “Subcooling”, please
follow below.
NOTE: Charging equipment must use dedicated PVE oil
gauges and hoses.
1. Purge gauge lines.
2. Connect service gauge manifold to liquid base valve
service ports.
3. Convert the liquid pressure to temperature using a
temperature/pressure chart.
4. Temporarily install a thermometer on the liquid line at
the liquid line service valve.
Ensure the thermometer makes adequate contact and
is insulated for best possible readings.
5. Subtract the liquid line temperature from the converted
liquid pressure to determine subcooling.
6. Before starting the subcooling adjustment, make sure
the outdoor ambient temperature is in a below range
and the unit is operating at 100% capacity.
If the unit is operating at 100% capacity which is ready
for charge by subcooling, seven segments will light up
as “cha”.
But, if the unit is not operating at 100% capacity which
is not ready for charging, seven segments will ush
as “cha”.
7. If the system subcooling is not within the range
as shown in the following table, adjust subcooling
according to the following procedure.
a. If subcooling is low, add charge to adjust the
subcooling as specied in the following table.
b. If subcooling is high, remove charge to lower the
subcooling to below charging table value.
SUBCOOLING = (SAT. LIQUID TEMP.) - (LIQUID LINE
TEMP.)
Charging Table
OD Ambient
Temp (degF) < 65 °F 65°F to 105°F > 105 °F
Subcooling
(degF)
Weigh in
Charge
3.5 T - 8 ±1°F
4.0 T - 9 ±1°F
5.0 T - 8 ±1°F
Weigh in
Charge
Note: Subcooling information is valid only while the unit is operating at
100% capacity or 100% of compressor speed in CHARGE MODE.
Compressor speed is displayed under STATUS menu in the thermostat.
NOTE: Not more than 3/8 lb. (6 oz.) of refrigerant be added
to the system at a time to achieve the target subcooling. It is
recommended adding 1 oz. refrigerant each time, then wait
10 minutes to stabilize the system.
check the Schrader portS for leakS and tIghten valve coreS, If
neceSSary. InStall capS fInger-tIght.
NOTICE
donot adjuSt the charge BaSed on SuctIon preSSure.
NOTICE
SATURATED LIQUID
PRESSURE TEMPERATURE
CHART
SATURATED LIQUID
PRESSURE TEMPERATURE
CHART
LIQUID
PRESSURE
PSIG
R-410A
°F
LIQUID
PRESSURE
PSIG
R-410A
°F
200 70 325 101
210 73 355 108
220 76 375 112
225 78 405 118
235 80 415 119
245 83 425 121
255 85 435 123
265 88 445 125
275 90 475 130
285 92 500 134
295 95 525 138
305 97 550 142