Lennox SL280DFNV Series User's Information Manual
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Lennox SL280DFNV Series User's Information Manual

Lennox SL280DFNV Series User's Information Manual

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©2021 Lennox Industries Inc.
Dallas, Texas, USA
508149-01
06/2021
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, 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 HVAC installer or
equivalent, service agency, or the gas supplier.
WARNING
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
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
SL280DFNV
SERIES

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Summary of Contents for Lennox SL280DFNV 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 ©2021 Lennox Industries Inc. Dallas, Texas, USA SL280DFNV SERIES...
  • Page 2 SL280DFNV Parts Identification BLOWER INTEGRATED MOTOR CONTROL COMBUSTION AIR INDUCER GAS VALVE HEAT EXCHANGER ASSEMBLY FIGURE 1 NOTE - This manual is the property of the homeowner If this is not possible, the water supply to the house should and must be left with the equipment user. be shut off and the pipes should be drained.
  • Page 3 Reliable de- tectors are available at reasonable retail prices. Contact the furnace is installed. Take care to maintain your Lennox dealer for more details about this invest- established clearances surrounding the furnace. ment in your safety.
  • Page 4 GAS VALVE MANIFOLD PRESSURE ADJUSTMENT (TURN CCW TO INCREASE PRESSURE) HSI/CAI NEGATIVE AIR POSITIVE AIR PRESSURE PORT PRESSURE PORT OUTLET INLET DIAGNOSTIC FLAME SENSE SureLight ® SUPPLY MANIFOLD PRESSURE PRESSURE TAP GAS VALVE SHOWN IN THE ON POSITION FIGURE 3 9 - Replace the upper access panel.
  • Page 5 OR EXPLOSION HAZARD. Service Reminder Failure to follow safety warnings exactly Call your Lennox service technician if the unit will not op- could result in dangerous operation, serious erate. Before calling, always check the following to be injury, death or property damage.
  • Page 6 If you discover any of the following, shut down your unit, 5 - Check the condition and cleanliness of burners and and contact a Lennox dealer for an inspection by a licensed professional service technician (or equivalent). heat exchanger and clean if necessary.
  • Page 7 Blower Parts Repair Parts Blower wheel The following repair parts are available through Lennox Motor dealers. When ordering parts, include the complete fur- nace model number listed on the CSA International name- Blower housing cut-off plate plate -- Example: SL280DF060NV36B-0. All service...

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