3
GENERAL INFORMATION
C8DA series coils are designed for upflow or downflow
applicationsandareequippedwithdownturnedrefrigerant
connections and are ready for brazing.
• Checkthecoilsoricesizeandconrmthatit’ssuitable
forapplicationwiththeintendedoutdoorunit.Depending
on application, additional installer supplied orifice or
TXVmayberequired.
• Optional cooling/heating equipment must be
properly sized and installed in accordance with the
furnace manufacturer’s specications and approved
recommendations.
• Heating only furnace air circulators may have to be
replacedwithmulti-speedHeating/Coolingblowersto
upgradetheairdelivery(CFM)whenanadd-oncoilis
installed.RefertoTable1(page6)forcoilspecications,
recommendedCFM,andallowancesforpressuredrop
across the coil and filters.
• Verifythattheairdeliveryofthefurnace/airhandleris
adequate to handle the static pressure drop of the coil,
filter, and duct work.
• Ifpreciseformingofrefrigerantlinesisrequired,acopper
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.
• Thecoilenclosure(ifprovided)andsuctionlinemust
be insulated as needed to prevent condensate from
forming and causing property damage.
• Do not remove seals from the coil until the tubing
connections are ready to be made.
• Close-off plates are available in some air lter kits.
RefertotheReplacementPartsListforavailablepart
numbers. Install the necessary close-off plates around
the refrigerant lines and drain line where required.
Reinstallallinnerandouterpanelsofthefurnace/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.Disconnectallelectricalpowertothefurnace.
2.Installthecoilcaseonthefurnaceairdischargeopening
and level it as needed to ensure proper condensate
drainage. If needed, make a plate to adapt the coil to
theairdischargeopening.SeeFigure5(page6)for
coil dimensions.
3.Makeandinstalltheplenumoverthecoil.Insulateas
required.
4.Seal theenclosure asrequired tominimizeairleakage.
5.Connect the refrigerant lines as outlined in the
RefrigerantLineConnectionsection.
Downflow Installations
Thesecoilsmaybeinstalledindownowapplications.It
isrequiredthatthe furnaceandcoil cabinetsaresecurely
mounted together before setting in place. Fossil fuel
applications require the coil to be placed in the supply
air stream only.
Refrigerant Line Connections
System Depressurization
1.Removethecap(Figure1)fromtheendoftheliquid line.
2.VerifypressurizationbydepressingtheSchradervalve
ontheendoftheliquidline.Listenforanyescapinggas.
If there is no pressure, test the coil for leakage.
• Ifleakageisfound,clearlymarkthelocationofthe leak
and return the coil to the distributor for processing.
• Ifnoleaksarefound,thecoilmaybeinstalled.
3.Depress the valve to relieve all pressure from the coil.
Suction
Line
Liquid
Line
Cap
Schrader
Valve
Figure 1. Suction & Liquid Line Locations
