Nortek C8QA Series User manual

C8QA Series Split System Uncased Indoor Coils - Quick Connect
INSTALLATION INSTRUCTIONS
DO NOT DESTROY. PLEASE READ CAREFULLY AND KEEP IN A SAFE PLACE FOR FUTURE REFERENCE.
IMPORTANT
ATTENTION INSTALLERS:
It is your responsibility to know this product better than your customer.This includes being
abletoinstalltheproduct accordingtostrictsafetyguidelinesandinstructingthe customer on
how to operate and maintain the equipment for the life of the product.Safety should always be
the deciding factor when installing this product and using common sense plays an important
role as well.Pay attention to all safety warnings and any other special notes highlighted in the
manual. Improper installation of the furnace or failure to follow safety warnings could result
in serious injury, death, or property damage.
These instructions are primarily intended to assist qualified individuals experienced in the
proper installation of this appliance. Some local codes require licensed installation/service
personnel for this type of equipment. Please read all instructions carefully before starting the
installation. Return these instructions to the customer’s package for future reference.

2
IMPORTANT SAFETY INFORMATION
Pleasereadallinstructionsbeforeservicingthisequipment.
Payattentiontoallsafety warningsandanyother special
notes highlighted in the manual. Safety markings are
used frequently throughout this manual to designate a
degreeorlevelofseriousnessandshouldnotbeignored.
WARNINGindicatesapotentiallyhazardoussituationthat
if not avoided, could result in personal injury or death.
CAUTIONindicatesapotentiallyhazardoussituationthat
if not avoided, may result in minor or moderate injury or
property damage.
WARNING:
ThisC8QAcoilmustbeinstalledinaccordance
with the instructions outlined in this manual
during the installation, service, and operation
of this unit. Unqualified individuals should
not attempt to interpret these instructions or
install this equipment. If you do not posses
mechanicalskillsortools,callyourlocaldealer
forassistance.Undernocircumstancesshould
the equipment owner attempt to install and/or
service thisequipment.Failuretofollowsafety
recommendations could result in possible
damage to the equipment, serious personal
injury or death.
WARNING:
TheC8QAseriesuncasedindoorcoilischarged
at the factory with an R-410A refrigerant
holdingchargetoprevententranceofmoisture
and contaiminants during shipment. Follow
all charging instructions for maximum unit
performance and efficiency. Refrigerant
charging must be done by qualified personnel
familiar with safe and environmentally
responsible refrigerant handling procedures.
WARNING:
Improper installation, service, adjustment,
or maintenance may cause explosion, fire,
electricalshockorotherhazardousconditions
whichmayresultinpersonalinjuryorproperty
damage. Unless otherwise noted in these
instructions, only factory authorized kits or
accessories may be used with this product.
WARNING:
PROPOSITION 65 WARNING: This product
contains chemicals known to the state of
California to cause cancer, birth defects or
other reproductive harm.
CAUTION:
This unit uses R-410A refrigerant with POE
oil.When servicing, cover or seal openings to
minimizetheexposureoftherefrigerantsystem
to air to prevent accumulation of moisture and
other contaminants.
• The installer must comply with all local codes and
regulations which govern the installation of this type
of equipment. Local codes and regulations take
precedence over any recommendations contained in
these instructions. Consult local building codes for
special installation requirements.
• Familiarizeyourselfwiththecontrolsthatshutoffthe
electrical power to the unit. If the unit needs to be shut
down for an extended period of time, turn off electrical
power at the circuit breaker. For your safety always
turn off the electrical power before performing service
or maintenance on the unit.
• Installationofequipmentmayrequirebrazingoperations.
Installer must comply with safety codes and wear
appropriate safety equipment (safety glasses, work
gloves,fireextinguisher,etc.)whenperformingbrazing
operations.
• Read the Installation Instructions supplied with the
furnace or air handler. Always observe all safety
requirementsoutlinedinthismanualandonthefurnace
or air handler markings before installing the coil.
• Follow all precautions in the literature, on tags, and
on labels provided with the equipment. Read and
thoroughly understand the instructions provided with
the equipment prior to performing the installation and
operational checkout of the equipment.

3
GENERAL INFORMATION
C8QA series coils are designed for upflow or downflow
applications and incorporate single shot coupling
refrigerant connections for easy installation.
• Verifythatthecoilsoricesizeissuitableforapplication
withtheintendedoutdoorunit.Dependingonapplication,
additional installer supplied orice or TXV may be
required.
• Optional cooling/heating equipment must be
properly sized and installed in accordance with the
furnace manufacturer’s specifications and approved
recommendations.
• Heating only furnace air circulators may have to be
replacedwithmulti-speedHeating/Coolingblowersto
upgradetheairdelivery(CFM)whenanadd-oncoilis
installed.RefertoTable1(page7)forcoilspecications,
recommendedCFM,andallowancesforpressuredrop
across the coil and filters.
• Verifythattheairdeliveryofthefurnace/airhandleris
adequate to handle the static pressure drop of the coil,
filter, and duct work.
• Ifpreciseformingofrefrigerantlinesisrequired,acopper
tubingbenderisrecommended.Avoidsharpbendsand
contact of the refrigerant lines with metal surfaces.
• Refrigerant lines should be wrapped with pressure
sensitive neoprene or other suitable material where
they pass against sharply edged sheet metal.
• Thecoilenclosure(ifprovided)andsuctionlinemust
be insulated as needed to prevent condensate from
forming and causing property damage.
• Close-off plates are available in some air lter kits.
RefertotheReplacementPartsListforavailablepart
numbers. Install the necessary close-off plates around
the refrigerant lines and drain line where required. See
Figures2-5(page4).Reinstallallinnerandouterpanels
ofthefurnace/airhandlerthatwerepreviouslyremoved
when installing the indoor coil.
COIL INSTALLATION
WARNING:
ELECTRICAL SHOCK, FIRE OR EXPLOSION
HAZARD
Failure to follow safety warnings exactly could
result in serious injury or property damage.
Improper servicing could result in dangerous
operation, serious injury, death or property
damage.
 
to the furnace and outdoor condensing unit.
 
to disconnecting. Reconnect wires correctly.
 
CAUTION:
The coil must be level to ensure proper
condensate drainage. An unlevel installation
may result in structural damage, premature
equipment failure, or possible personal injury.
Upflow Installations
1.Disconnectallelectricalpowertothefurnace.
2.Install the coil on the furnace air discharge opening.
NOTE: It may be necessary to install the coil at the
air inlet opening if dictated in the furnace installation
instructions.
3. If needed, make a plate to adapt the coil to the air
dischargeopening.SeeFigure1forcoildimensions.
4.Level the coil as needed to ensure proper condensate
drainage.
5.Makeandinstalltheplenumoverthecoil.Insulateas
required.
6.Seal theenclosure asrequired to minimizeairleakage.
7.Connect the refrigerant lines as outlined in the
RefrigerantLineConnectionsection(page4).
Downflow Installations
DownowFE/E*ElectricFurnace:
1.Disconnectallelectricalpowertothefurnace.
2.Selecttheappropriatecoilconversionkitwhichincludes
2airfilters,close-offplates(2sets)andacoilholddown
bracket.
3.Remove the lter located at the top of the furnace
cabinet.
4.Removetherefrigerantlineknockoutslocatedatthe
top and bottom of the furnace cabinet.
5.Installthecoilandlevelitasneededtoensureproper
condensate drainage.
6.Secure the coil hold down bracket with screws.
7.Addairlterstothesidesofthecoil.
20" (508 mm)
Floor Cut Out
for Refrigerant Lines
and Drain Hose
3 3/4"
(95 mm)
5 3/8"
(133 mm)
19 1/16"
(500 mm)
FURNACE OUTLINE
REAR WALL (CLOSET OR ALCOVE)
3/4" (19 mm)
Furnace Outer Door
4 1/2" (114 mm) MAX
Figure 1. Location of Floor Cut-Out for
Refrigerant Lines & Drain Hoses

4
8.Cut the floor opening for the refrigerant lines and drain
line.SeeFigure1.
9.Connect the refrigerant lines as outlined in the
RefrigerantLineConnectionsection(page4).
DownowFurnacewithIntegralCoilCabinet
orOptionalCabinet
1.Disconnectallelectricalpowertothefurnace.
2.Removetheknockoutintheleftbottomcornerofthe
furnace and cut anappropriatelysizedhole in the floor.
SeeFigure1.NOTE:Fortheoptionalcabinet,referto
its installation instructions for assembly details.
3.Removetheinteriorcoilpanel.Installthecoilandlevel
it as needed to ensure proper condensate drainage.
4.Remove the knockout for the refrigerant lines in the
secondary covers and replace in the furnace.
NOTE:Modicationstothepanelmayberequired.
5.Slidetheclose-offplatesaroundtherefrigerantlines
andinstalltheprovideddartclips.SeeFigure2.
6.Snap the bushings around the lines and into the close-
off panels.
7.Connecttherefrigerantlinesasoutlinedintherefrigerant
lines section.
Refrigerant Line Connections
Thetotalsystem operating chargeofR-410A is inthe
outdoorunitandisadequateforthematchedlistedsystem
including15feetoflineset.
CAUTION:
Inorifice style coils beforeproceedingwith the
connectionoftherefrigerantlines,confirmthat
theorificesizemeetstherequirementsoutlined
in the outdoor unit installation manual.
FactoryinstalledoricesizesarelistedinTable1(page
7).Iftherestrictororicemustbereplaced,seeRestrictor
Change-Outsection(page5).
1.Removetheprotectivecapsfromthecoilandrefrigerant
line set couplings.
2.With a soft, dust-free cloth, carefully wipe clean all
coupling threads and seals to remove any dust or
materialwhichcouldcontaminatetherefrigerantsystem.
3.Using refrigerant oil, lightly lubricate the diaphragm,
seal, and mating threads.
4.Connectthecouplingsasfollows:
a.)Lineuptherefrigerantlinewiththecoilcouplingand
thread together by hand to ensure proper thread
mating.Holdthehexofthe malecouplingwitha
wrenchandslowlywrenchtightentheunionnutuntil
a definite resistance (bottoming out) is felt.
b.)Markthepositionoftheunionnut(matchlinesonthe
linecoupling and the coil coupling), then tighten the
couplinganadditional1/4turntoensurealeakproof
connection.UsetheTorqueValuestable(below)if
a torque wrench is used.
5.Checkthesystemforleaks.
MOUNTING
HOLE
SMALL
PLATE
LARGE
PLATE

SMALL
PLATE
TAB
LARGE
PLATE
TABS OFFSET
MOUNTING
HOLES (2)
TABS
Figure 4. Close-Off Plates for Opening
atTop of Furnace
Figure 2. Close-Off Plate Assembly
SMALL
PLATE
LARGE
PLATE TABS
MOUNTING
HOLE
OFFSET
Figure 5. Close-Off Plates
(Supplied w/ appropriate blower conversion package)

5

Install restrictor with
rounded end down
in the distributor

Figure 7. Removal of Orifice
Carefully remove the
restrictor orifice from
the distributor body
OriceRemoval&Installation
If the orifice must be replaced, follow the steps below.
NOTE:FactorysuppliedoricesizesarelistedinTable
1(page7).
1.Connectonlythesuctionlinecouplingtothecoil
2.Reclaimtheholdingchargefromthecoilandsuction
vaporlinethroughtheSchraderportusingthemethods
approvedundertheRefrigerantTransitionandRecovery
Certification Program.
CAUTION:
To prevent damage to the unit or internal
components, it is recommended that two
wrenchesbeusedwhenlooseningortightening
nuts. Do not over tighten!
3.Openthedistributorbodyusingtwoopenendwrenches
and turning the swivel nut counterclockwise.
4.Insertalight-gaugewirehookbetweenthedistributor
body and the restrictor orifice while being careful not
to scratch either part. Carefully remove the restrictor
oricefromthedistributorbody.SeeFigure7.
5.Selectthepropersizerestrictor.Thesizeisstampedon
its side. Do not use pin gauges to measure the orifice
diameter.
6.Insert the new orifice into the distributor body, rounded
enddown.SeeFigure8.
CAUTION:
To prevent damage to the unit or internal
components, it is recommended that two
wrenchesbeusedwhenlooseningortightening
nuts. Do not over tighten!
7.Realigntheassemblynutonthedistributorbodyand
hand tighten both components. Mark a line on both
bodiesandthentightenanadditional1/4turnusingtwo
wrenches.Themovementofthetwolineswillshowhow
much the nut is tightened. If a torque wrench is used,
tightento10-12ft.lbs.or14-16Nm.
8.EvacuatethesystemthroughtheSchraderportonthe
vapor line.
9.Connect the liquid line and check the connections for
leaks.

6

WARNING:
ELECTRICAL SHOCK, FIRE OR EXPLOSION
HAZARD
Failure to follow safety warnings exactly could
result in serious injury or property damage.
Improper servicing could result in dangerous
operation, serious injury, death or property
damage.
     
power to the furnace and outdoor condensing
unit.
 
to disconnecting. Reconnect wires correctly.
 
CAUTION:
Do not operate the system without a suitable
filter in the return air duct system. Always
replace the filter with the same size and type.
Toensureoptimumperformanceandtominimizepossible
equipmentfailure,thefollowingmaintenancetasksshould
beperformedperiodicallyonthisequipment:
1.Theairlterinstalledwiththesystemshouldbechecked
and cleaned or replaced twice per year.
2.Check the coil, drain pan, and condensate drain line
for cleanliness at the start of each heating and cooling
season. Clean as needed.
Condensate Drain
CAUTION:
The coil must be level to ensure proper
condensate drainage. Improper condensate
disposal may result in structural damage,
premature equipment failure, or possible
personal injury.
• Methodsfordisposingofcondensatevaryaccording
tolocalcodes.Refertolocalcodesorauthorityhaving
jurisidiction for restrictions and proper condensate
disposal requirements.
• Allcondensatepanshaveprimaryandsecondarydrain
connectionstomeetFHArequirements.Iftheapplication
is located in or above a living space where damage
mayresultfromcondensateoverow,aseparate3/4
inch drain must be provided from the secondary drain
connectionandasecondarydrainpanmustbeinstalled
undertheentireunit.Runsecondarydrainlinestoa
place where they are noticeable if used.
• The coil condensate pan is designed with 3/4”
NPSC drain connections. Use a PVC or similar
material fitting to attach the drain line to the pan.
NOTE: The tting should be hand tightened only.
Overtightening may crack the drain pan and cause
condensate to leak.
• The drain pan MUST be drained with eld supplied
tubing and looped to form a trap.
IMPORTANT: Failure to install a trap may result in
condensation overflowing the drain pan, resulting in
substantial water damage to surrounding area.
• Primethetrapwithwater.Insulatethedrainifitislocated
inanunconditionedspace,andtestthecondensateline
for leaks. Consult local codes for additional restrictions
or precautions.
• Routethelinestoasuitabledrain,avoidingsharpbends
andpinchingofthelines.Thedrainshouldmaintaina
minimum horizontal slope in the direction of discharge
ofnotlessthan1”verticalforevery10ftofhorizontal
run.
• During system checkout, inspect the drain line and
connections to verify proper condensate drainage.
Air Filter
Air filters are not supplied as an integral part of this
coil; however, an air lter kit is available. Refer to the
ReplacementPartsListforavailablepartnumbers.
The lter must be installed upstream of the coil and
inspected frequently. When the filter becomes clogged
with dust or lint, it should be replaced (disposable type)
orcleaned(washabletype).Itisrecommendedthatfilters
be inspected and replaced at least twice during the year.
Generally it is best to replace or clean the filters at the
start of each heating and cooling season.

7
Figure 9. C8QA Coil Dimensions
2 1/2”
W
19 1/2”
1 3/8”
1”
12 1/8”
14 1/2”
H
Table 1. Coil Specifications
C8QA- 024 030 036 042
NominalCapacity(BTUH) 24,000 30,000 36,000 42,000
NominalAirow(CFM) 800 1,000 1,200 1,400
W - Width (in.) 181/8 181/8 181/8 181/8
H-Height(in.) 18 18 18 243/4
D - Depth (in.) 191/2 191/2 191/2 191/2
Connection - Liquid Line (in.) 3/8 3/8 3/8 3/8
Connection - Suction Line (in.) 3/4 3/4 3/4 3/4
InstalledOriceSize(in.) .055 .061 .067 .072
NOTES:
1. Individualrestrictorsareavailablebypartnumber-PN664***(where***representsthesize).
Example:664103isarestrictor0.103indiameter.
2. RefertosalesspecicationsheetsforListed/Certiedcombinationsofequipmentandrequiredaccessories.
3. RefertothecurrentAHRIdirectoryforcertiedratingsofsplitsystems.
COIL SPECIFICATIONS & DIMENSIONS

Specications&illustrationssubjecttochangewithoutnoticeorincurringobligations.
O’Fallon,MO|PrintedinU.S.A.(02/12) 709280A (Replaces7092800)

INSTRUCTIONSWITHTHE EQUIPMENT OWNER.