Nortek SL Series User Manual

SINGLE STAGE & TWO-STAGE GAS FURNACES
USER’S MANUAL
NON-CONDENSING GAS FURNACES
CONDENSING GAS FURNACES
80+ AFUE 92.1% AFUE 95% & Up to 96% AFUE
*SA Upflow / Horizontal
Furnaces
*SC Upflow / Horizontal
Furnaces
*SD, *SD-E, & *TC
Upflow / Horizontal Furnaces
& *TE Furnaces (Upflow only)
*SK Downflow
Furnaces
*SL Downflow
Furnaces
*SM, *TL, *TN
Downflow Furnaces
WARNING
FIRE OR EXPLOSION HAZARD
• Failure to follow safety warnings exactly could
result in serious injury or property damage.
• Installation and service must be performed by
a qualified installer, service agency or the gas
supplier.
• Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any
other appliance.
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.
• Leave the building immediately.
• Immediately call your gas supplier from a
neighbors phone. Follow the gas suppliers
instructions.
• If you cannot reach your gas supplier, call the
fire department.
DO NOT DESTROY. PLEASE READ CAREFULLY & KEEP IN A SAFE PLACE FOR FUTURE REFERENCE.

Nortek SL Series Specifications

General

Brand	Nortek
Model	SL Series
Category	Furnace
Language	English

Summary

Important Safety Information

Gas Supply & Piping Safety

Proper installation and handling of gas supply and piping are crucial for safety and preventing fire or explosion.

Filter Operation and Safety

Never operate without a filter; dust buildup causes damage and fire. Keep filters clean for efficiency.

Flood Damage Precautions

Do not use a furnace that has been submerged; it is extremely dangerous and poses fire or explosion risks.

Venting System Safety

Proper venting prevents dangerous carbon monoxide production. Ensure terminals are unobstructed and seal openings.

Corrosion Hazards and Prevention

Avoid storing chemicals like solvents, cleaners, or refrigerants near the furnace to prevent heat exchanger corrosion.

Clearances to Combustibles

Keep furnace area clear of flammable materials, gasoline, and vapors to prevent fire or explosion.

About the Furnace

Filter Importance and Maintenance

Air filters are essential for performance and longevity. They must be installed, cleaned, or replaced regularly.

Startup and Shutdown Procedures

Starting the Furnace

Shutting Down the Furnace

Troubleshooting Common Issues

Maintenance and Inspection