SYSTEM OPERATION
14
AIR
DISCHARGE
Bottom
Return
Duct
Connection
Side
Return
Duct
Connection
Side
Return
Duct
Connection
AIR
DISCHARGE
Bottom
Return
Duct
Connection
AIR
DISCHARGE
AIR
DISCHARGE
Bottom
Return
Duct
Connection
Bottom
Return
Duct
Connection
Alternate “vertical” piping connections can not be
used when an upow 90% furnace is installed with supply
air discharging to the right or when a counterow furnace is
installed with supply discharging to the left. In this case, use
the standard ue and combustion air piping connections
A
Furnaces have provisions allowing for electrical and gas
line connections through either side panel. In horizontal
applications the connections can be made either through the
“top” or “bottom” of the furnace.
D
A drain pan must be provided if the furnace is installed above
a conditioned area. The drain pan must cover the entire area
under the furnace (and air conditioning coil if applicable).
If the drain trap and drain line will be exposed to temperatures
near or below freezing, adequate measures must be taken
to prevent condensate from freezing. The use of
insulation and/or heat tape is recommended. Failure to
provide proper condensate drainage can result in property
damage.
WARNING
PSSILE PRPER DAMAGE PERSNAL INJR R DEA MA CCR I
E CRREC CNVERSIN KIS ARE N INSALLED
E APPRPRIAE KIS
MS E APPLIED INSRE SAE AND PRPER RNACE PERAIN
A
LL
CNVERSINS MS E PERRMED A QALIIED INSALLER R SERVICE
AGENC
This furnace is shipped from the factory congured for natural
gas at standard altitude. Propane gas installations require
an orice change to compensate for the energy content
dierence between natural and propane gas.
High altitude installations may require both a pressure switch
and an orice change. These changes are necessary to
compensate for the natural reduction in the density of both
the gas fuel and the combustion air at higher altitude.
Refer to the Accessories Charts in this manual or product
Specification Sheet for a tabular listing of appropriate
manufacturer’s kits for propane gas and/or high altitude
installations. The indicated kits must be used to insure
safe and proper furnace operation. All conversions must be
performed by a qualied installer, or service agency.
V
WARNING
AILRE LLW ESE INSRCINS CAN RESL IN DIL INJR R
DEA
C
ARELL READ AND LLW ALL INSRCINS GIVEN IN IS
SECIN
WARNING
PN CMPLEIN E RNACE INSALLAIN CARELL INSPEC E
ENIRE LE SSEM INSIDE AND SIDE E RNACE ASSRE I
IS PRPERL SEALED
L
EAKS IN E LE SSEM CAN RESL IN SERIS
PERSNAL INJR R DEA DE EXPSRE LE PRDCS
INCLDING CARN MNXIDE
This manual will refer to the pipe that discharges products of
combustion to the outdoors as the “vent” pipe or “ue” pipe.
The pipe that supplies air for combustion to the furnace will
be referred to as the “intake” pipe or “combustion air” pipe.
A condensing gas furnace achieves its high level of eciency
by extracting almost all of the heat from the products of
combustion and cooling them to the point where condensation
takes place. Because of the relatively low ue gas temperature
and water condensation requirements, PVC pipe is used as
venting material.
This furnace must not be connected to Type B, BW, or L vent
or vent connector, and must not be vented into any portion
of a factory built or masonry chimney except when used as
a pathway for PVC as described later in this section.
common vent this appliance with another appliance or use a
vent which is used by a solid fuel appliance.
It is the responsibility of the installer to follow the manufacturers’
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