INSTALLATION CONSIDERATIONS
20
AIR
DISCHARGE
Bottom
Return
Duct
Connection
Side
Return
Duct
Connection
Side
Return
Duct
Connection
UPFLOW
UPRIGHT
AIR
DISCHARGE
Bottom
Return
Duct
Connection
UPFLOW HORIZONTAL
RIGHT AIR DISCHARGE
UPFLOW HORIZONTAL
LEFT AIR DISCHARGE
AIR
DISCHARGE
AIR
DISCHARGE
Bottom
Return
Duct
Connection
Bottom
Return
Duct
Connection
COUNTERFLOW HORIZONTAL
RIGHT AIR DISCHARGE
COUNTERFLOW HORIZONTAL
LEFT AIR DISCHARGE
90% Furnace Recommended Installation Positions
NOTE:
Alternate "vertical" piping connections can not be
used when an upflow 90% furnace is installed with supply
air discharging to the right or when a counterflow furnace is
installed with supply discharging to the left. In this case,
use the standard flue and combustion air piping connec-
tions
Alternate Electrical and Gas Line Connections
Furnaces have provisions allowing for electrical and gas line
connections through either side panel. In horizontal applica-
tions the connections can be made either through the “top”
or “bottom” of the furnace.
Drain Pan
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).
Freeze Protection
If the drain trap and drain line will be exposed to tempera-
tures near or below freezing, adequate measures must be
taken to prevent condensate from freezing.
NOTE:
The use
of insulation and/or heat tape is recommended. Failure to
provide proper condensate drainage can result in property
damage.
Propane Gas and/or High Altitude Installations
WARNING
P
OSSIBLE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH MAY OCCUR IF
THE CORRECT CONVERSION KITS ARE NOT INSTALLED.
T
HE APPROPRIATE KITS
MUST BE APPLIED TO INSURE SAFE AND PROPER FURNACE OPERATION.
A
LL
CONVERSIONS MUST BE PERFORMED BY A QUALIFIED INSTALLER OR SERVICE
AGENCY.
This furnace is shipped from the factory configured for natu-
ral gas at standard altitude. Propane gas installations re-
quire an orifice change to compensate for the energy con-
tent difference between natural and propane gas.
High altitude installations may require both a pressure switch
and an orifice change. These changes are necessary to com-
pensate 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 in-
stallations. The indicated kits must be used to insure safe
and proper furnace operation. All conversions must be per-
formed by a qualified installer, or service agency.
VENT/FLUE PIPE AND COMBUSTION AIR PIPE
WARNING
F
AILURE TO FOLLOW THESE INSTRUCTIONS CAN RESULT IN BODILY INJURY OR
DEATH.
C
AREFULLY READ AND FOLLOW ALL INSTRUCTIONS GIVEN IN THIS
SECTION.
WARNING
U
PON COMPLETION OF THE FURNACE INSTALLATION, CAREFULLY INSPECT THE
ENTIRE FLUE SYSTEM BOTH INSIDE AND OUTSIDE THE FURNACE TO ASSURE IT
IS PROPERLY SEALED.
L
EAKS IN THE FLUE SYSTEM CAN RESULT IN SERIOUS
PERSONAL INJURY OR DEATH DUE TO EXPOSURE TO FLUE PRODUCTS,
INCLUDING CARBON MONOXIDE.
A condensing gas furnace achieves its high level of efficiency
by extracting almost all of the heat from the products of
combustion and cooling them to the point where condensa-
tion takes place. Because of the relatively low flue gas tem-
perature 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 sec-
tion.
Never
common vent this appliance with another appli-
ance or use a vent which is used by a solid fuel appliance.
It is the responsibility of the installer to follow the manufac-
turers’ recommendations and to verify that all vent/flue pip-
ing and connectors are compatible with furnace flue prod-
ucts. Additionally, it is the responsibility of the installer to
