Operating Guide

3
GENERAL INFORMATION
C7 Series indoor cased coils are designed for upflow,
downflow, or horizontal applications and are equipped with
braze type refrigerant connections for easy installation. If
aTXVisrequired,seeTable1todeterminetheproperkit
based on tonnage and refrigerant type of the unit.
• Checkthecoilsoricesizeandconrmthatit’ssuitable
for application with the intended outdoor unit. Depending
on application, additional installer supplied orifice or
TXVmayberequired.
• Optional cooling/heating equipment must be
properly sized and installed in accordance with the
furnace manufacturer’s specications 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Tables2Aor2B(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
tubing bender is recommended. Avoid sharp bends and
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.
• Horizontalinstallationsrequireahorizontaldrainpan
kittobeinstalled.SeeTables2Aor2Bforavailable
part numbers.
• 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.
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.
NOTE TO INSTALLER: C7 Coils are not factory charged
with refrigerant. It will be necessary to evacuate the indoor
coiland lineset prior tocharging. Refer to theoutdoor
unit installation manual for detailed charging instructions.
Upflow Installations
1.Disconnectallelectricalpowertothefurnace.
2. Install the coil case on the furnace air discharge opening
and level it as needed to ensure proper condensate
drainage. If needed, make a plate to adapt the coil to
theairdischargeopening.SeeFigure5(page7)for
coil dimensions.
3.Makeandinstalltheplenumoverthecoil.Insulateas
required.
4. Seal the enclosure as required to minimize air leakage.
5.Connect the refrigerant lines as outlined in the
RefrigerantLineConnectionsection.
Horizontal Installations
C7 coils can be installed horizontally, but it is required
that the furnace and coil cabinets be securely mounted
together before setting in place. A horizontal drain pan
kitmustalsobeinstalledunderthecoil.RefertoTables
2Aor2B(page7)foravailablepartnumbers.
HorizontalLeftInstallations
1.Disconnectallelectricalpowertothefurnace.
2.Removethecoilaccessdoor.
3.Removetheplugandknockoutfromoneofthethreaded
holes in the horizontal drain pan.
 SIZE of A.C. or H.P. (Tons)
R-22
Refrigerant
920662A 1.5or2
920663A 2.5
920664A 3
920665A 3.5
920666A 4
920667A 5
R-410A
Refrigerant
920668A 1.5or2
920669A 2.5
920670A 3
920671A 3.5
920672A 4
920673A 5
