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E 2018 Lennox Industries Inc.
Dallas, Texas, USA
507761-01
02/2018
Supersedes 11/2107
Do not store or use gasoline or other
flammable vapors and liquids in the
vicinity of this or any other ap
pliance.
Installation and service must be
performed by a qualified installer,
service agency or the gas supplier.
WARNING
Improper installation, adjustment, alteration, service
or maintenance can cause property damage, personal
injury or loss of life. Installation and service must be
performed by a licensed professional installer (or
equivalent), a service agency, or the gas supplier.
WARNING
FIRE OR EXPLOSION HAZARD.
Failure to follow safety warnings exact
ly could result in serious injury, death,
or property damage.
D Do not try to light any appliance.
D Do not touch any electrical switch; do not
D Leave the building immediately.
D Immediately call your gas supplier from a
D If you cannot reach your gas supplier, call
WHAT TO DO IF YOU SMELL GAS:
use any phone in your building.
neighbor's phone. Follow the gas supplier's
instructions.
the fire department.
SL297UHNV
SERIES
GAS FURNACE
Litho U.S.A.
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Summary of Contents for Lennox SL297NV
- Page 1 E 2018 Lennox Industries Inc. Dallas, Texas, USA 507761-01 SL297UHNV 02/2018 Supersedes 11/2107 SERIES GAS FURNACE WARNING Improper installation, adjustment, alteration, service or maintenance can cause property damage, personal injury or loss of life. Installation and service must be performed by a licensed professional installer (or Litho U.S.A.
- Page 2 SL297UHNV Parts Identification EXCHANGER ASSEMBLY TOP CAP AIR INTAKE FLUE GAS VALVE COLLAR PRESSURE SWITCH ASSEMBLY ACCESS PANEL COMBUSTION AIR INDUCER BLOWER MOTOR INTEGRATED CONTROL FIGURE 1 NOTE - This manual is the property of the homeowner eration must be checked periodically. If this is not possible, and must be left with the equipment user.
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Page 3: Safety Instructions
Because unobstructed flow of combustion and ventilating air. of this, Lennox recommends the use of a carbon monox DO NOT block or obstruct air openings on the furnace ide detector in your home, even if you do not own gas or air openings to the area in which the furnace is installed. - Page 4 Operating the Gas Valve (Figure 3) Start-Up & Operation Information 1 - STOP! Read the safety information at the beginning of NOTE - When the furnace begins heating mode, the di this section. agnostic LED on the furnace control will display “H1” 2 - Set the thermostat to the lowest setting.
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Page 5: Maintenance
Service Reminder Before performing maintenance disconnect all elec Call your Lennox service technician if the unit will not oper trical power to furnace. ate. Before calling, always check the following to be sure... -
Page 6: Safety Precautions
If you discover any of the following, shut down your 5 Check the condition and cleanliness of burners and unit, and contact a Lennox dealer for an inspection by heat exchanger and clean if necessary. a licensed professional service technician (or equiva... -
Page 7: Repair Parts List
Repair Parts List The following repair parts are available through Lennox dealers. When ordering parts, include the complete furnace model number listed on the CSA International nameplate -- Example: SL297UH040NV36B. All service must be done by a li...