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SLP98DFV Gas Furnace
The SLP98DFV category IV gas furnace is equipped with
a variable−capacity, variable−speed integrated control.
This control ensures compatibility with the Lennox icom-
fort Toucht thermostat and Harmony IIIt zone control
system, as well as a thermostat which provides humidity
control.
The furnace is equipped for installation in natural gas ap-
plications only. A changeover kit may be ordered for LP
applications.
The SLP98DFV must be installed only as a Direct Vent
gas central furnace.
NOTE − In Direct Vent installations, combustion air is taken
from outdoors and flue gases are discharged outdoors. See
figure 2 for applications including roof termination.
FIGURE 2
DIRECT VENT INSTALLATION
EXHAUST OUTLET
COMBUSTION
AIR INTAKE
OUTSIDE OF
HOUSE
SLP98DFV
Shipping and Packing List
Package 1 of 1 contains
1 − Assembled SLP98DFV unit
1 − Bag assembly containing the following:
3 −Wire nuts
1 −Snap bushing
1 −Snap plug
1 − Wire tie
1 −Condensate trap
Check equipment for shipping damage. If you find any
damage, immediately contact the last carrier.
The following items may also be ordered separately:
1 −Thermostat
1 −Natural to LP gas conversion kit
1 −High altitude kit
Safety Information
WARNING
Improper installation, adjustment, alteration, service
or maintenance can cause property damage, person-
al injury or loss of life. Installation and service must
be performed by a licensed professional installer (or
equivalent), service agency or the gas supplier.
CAUTION
As with any mechanical equipment, personal injury
can result from contact with sharp sheet metal
edges. Be careful when you handle this equipment.
Use only the type of gas approved for use with this furnace.
Refer to unit nameplate.
Building Codes
In the USA, installation of gas furnaces must conform with lo-
cal building codes. In the absence of local codes, units must
be installed according to the current National Fuel Gas Code
(ANSI-Z223.1/NFPA 54). The National Fuel Gas Code is
available from the following address:
American National Standards Institute, Inc.
11 West 42nd Street
New York, NY 10036
Installation Locations and Clearances
In Canada, installation must conform with current National
Standard of Canada CSA-B149 Natural Gas and Propane
Installation Codes, local plumbing or waste water codes
and other applicable local codes.
This furnace is designed for installation clearances to com-
bustible material as listed on the unit nameplate and in the
table in figure 7. Accessibility and service clearances must
take precedence over fire protection clearances.
For installation in a residential garage, the furnace must
be installed so that the burner(s) and the ignition source
are located no less than 18 inches (457 mm) above the
floor. The furnace must be located or protected to avoid
physical damage by vehicles. When a furnace is installed
in a public garage, hangar, or other building that has a haz-
ardous atmosphere, the furnace must be installed accord-
ing to recommended good practice requirements and cur-
rent National Fuel Gas Code or CSA B149 standard.
NOTE − Furnace must be adjusted to obtain a temperature
rise (100% percent capacity) within the range(s) specified on
the unit nameplate. Failure to do so may cause erratic limit
operation and may also result in premature heat exchanger
failure.
This SLP98DFV furnace must be installed so that its elec-
trical components are protected from water.