Lennox SL280UHV series User Manual

11/10
*2P1110*
506677−01
*P506677-01*
SL280UHV
SERIES
Litho U.S.A.
506677−01
11/2010
Supersedes
506409−01
GAS FURNACE
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.
E 2010 Lennox Industries Inc.
Dallas, Texas, USA
WHAT TO DO IF YOU SMELL GAS:
D Do not try to light any appliance.
D Do not touch any electrical switch; do not use any
phone in your building.
D Immediately call your gas supplier from a neighbor’s
phone. Follow the gas supplier’s instructions.
D If you cannot reach your gas supplier, call the fire
department.
D Extinguish any open flames.
D Leave the building immediately.
FIRE OR EXPLOSION HAZARD.
Failure to follow safety warnings exactly
could result in serious injury, death, or
property damage.
WARNING

Lennox SL280UHV series Specifications

General

Efficiency Rating	Up to 80% AFUE
Ignition System	Hot Surface Ignition
Model	SL280UHV series
Fuel Type	Natural Gas/Propane
Warranty	Limited Lifetime Heat Exchanger warranty; 5-Year Limited Warranty on covered components

Summary

Homeowner Information and Safety

Notice to Homeowner

Provides essential operational advice and safety precautions for homeowners regarding furnace function and unattended operation.

Electrical Power Disconnect Before Service

Crucial warning to disconnect electrical power before performing any service or maintenance on the unit.

Critical Safety Warnings and Instructions

Thermostat Setting Warning

Warning against setting thermostat below 60°F (16°C) to prevent unit damage and warranty voidance.

Flood-Damaged Furnace Warning

Critical warning against using flood-damaged furnaces due to explosion risk; requires professional inspection.

Appliance Modification Notice

Notice stating appliance modifications must be done by licensed professionals using approved parts.

Service and Maintenance Safety

Warning that improper service can cause property damage, personal injury, or loss of life.

Start-Up and Operation

Gas Valve Operation

Step-by-step instructions for operating the gas valve, including safety checks and correct positioning.

Furnace Ignition System

Information on the SureLight® ignition system and prohibition of manual burner lighting.

Turning Off Gas Supply

Procedure for safely turning off the gas supply to the unit, including electrical power shutdown.

Maintenance and System Checks

Filter Inspection and Replacement

Guidance on inspecting, cleaning, or replacing external furnace filters for optimal operation.

Venting System Inspection

Requirements for annual inspection of the furnace venting system for safety and integrity.

Blower and Burner Checks

Procedures for checking the blower wheel and inspecting burner flame and combustion analysis.

Service Reminders and Checks

Checklist of items to verify before calling for service, including electrical, thermostat, and gas settings.

Safety Precautions and Planned Service

Identifying Potential Hazards

Guidelines for recognizing unusual sounds, odors, or symptoms indicating potential furnace issues or CO exposure.

Annual Inspection Items

List of components to be checked during an annual inspection for safe operation and maintenance.

Preventing Unsafe Operation

Advice on preventing unsafe conditions, such as obstructed airflow, which can lead to CO production.

Repair Parts List

Cabinet and Control Panel Parts

List of available parts for the furnace cabinet, control panel, and blower assembly.

Heating System Components

List of available heating parts including heat exchanger, gas valve, ignitor, and limit controls.