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2020 Lennox Industries Inc.
©
Dallas, Texas, USA
508002-01
03/2020
Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any
other appliance.
Installation and service must be performed
by a qualified installer, service agency or the
gas supplier.
WARNING
Improper
installation,
service or maintenance can cause property damage,
personal injury or loss of life. Installation and service
must
be performed by a licensed professional
HVAC installer or equivalent, service agency, or the
gas supplier.
FIRE OR EXPLOSION HAZARD.
Failure to follow safety warnings exactly
could result in serious injury, death, or
property damage.
U S E R ' S I N F O R M AT I O N
U S E R ' S I N F O R M AT I O N
adjustment,
alteration,
WARNING
WHAT TO DO IF YOU SMELL GAS:
• Do not try to light any appliance.
• Do not touch any electrical switch; do not
• use any phone in your building.
• Immediately call your gas supplier from a
• neighbor's phone. Follow the gas supplier's
• instructions.
• If you cannot reach your gas supplier, call
• the fire department.
M A N U A L
M A N U A L
SLP99DFV SERIES
VARIABLE CAPACITY
GAS FURNACE
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Summary of Contents for Lennox SLP99DFV Series
- Page 1 U S E R ’ S I N F O R M AT I O N U S E R ’ S I N F O R M AT I O N M A N U A L M A N U A L 2020 Lennox Industries Inc. © Dallas, Texas, USA 508002-01...
- Page 2 SLP99DFV Parts Identification Air Intake Top Cap Flue Collar Variable Speed Blower Motor Variable Speed Combustion Air Inducer SureLight Integrated Control Duralok Heat Exchanger Assembly Pressure Switch Assembly Burners FIGURE 1 NOTE - This manual must be left wutgh the equipoment WARNING WARNING user.
- Page 3 Lennox strongly recom- system. mends annual inspection and maintenance of this appli- WARNING ance. Contact your Lennox dealer for an inspection by a licensed professional service technician. The blower door must be securely in place when the DANGER blower and burners are operating.
- Page 4 8 - Move gas valve switch to ON position. See figure 2. Start-Up & Operation Information 9 - Replace the outer access panel. WARNING 10 - Tur n on all electrical power to to the unit 11 - Se t the thermostat to desired setting. If you do not follow these instructions exactly, a fire or explosion may result causing property damage, NOTE - When unit is initially started, steps 1 through...
- Page 5 Inspect the furnace venting system to make sure it is in place, physically sound, and without holes, corrosion, or Call your Lennox service technician if the unit will not oper- blockage. ate. Before calling, always check the following to be sure...
- Page 6 4 - Check the cleanliness of filters and change if If you discover any of the following, shut down your necessary (monthly). unit, and contact a Lennox dealer for an inspection by 5 - Check the condition and cleanliness of burners and a licensed professional service technician (or equiv- heat exchanger and clean if necessary.
- Page 7 RepairParts 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: SLP99DF070V36B. All service must be done by a licensed professional installer (or equivalent), a service agency, or the gas supplier.
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