Use and Care Guide

3
• 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.
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 8) 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Table3, Table4, or
Table5 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.
CAUTION:
The knockout must be removed and discarded
to ensure proper condensate drainage. Improper
drainage may result in structural damage, premature
equipment failure, or possible personal injury.
4. Install plug (from horizontal drain pan) in the open drain
holeinthedrainpanatthebottomoftheunit.Thiswill
block bypass air from entering the system.
5.Removethedrainlineknockoutfromthecoilaccessdoor.
Thiswillallowaccesstothehorizontaldrain.
6. Install drain pan extension (if supplied with unit).
TXV KIT P/N 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
Table 1. TXV Kit Part Numbers
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.
• Beforeservicing,disconnectallelectricalpower
to the equipment.
• Whenservicingcontrols,labelallwirespriorto
disconnecting. Reconnect wires correctly.
• Verifyproperoperationafterservicing.
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.
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notinstalledbutrequiredforyourapplication,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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 3, Table 4, or Table 5, (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 Table3, Table4, or Table5 for available
part numbers.