E 2011 Lennox Industries Inc.

Dallas, Texas, USA

DOWNFLOW

AIR FLOW

CAUTION

As with any mechanical equipment, personal injury can result from contact with sharp sheet metal edges. Be careful when you handle this equipment.

This is a safety alert symbol and should never be ignored. When you see this symbol on labels or in manuals, be alert to the potential for personal injury or death.

INSTALLATION

INSTRUCTIONS

SL280DFV

DAVE LENNOX SIGNATURE®

COLLECTION GAS FURNACE

DOWNFLOW AIR DISCHARGE

506710−01

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

06/2011

Litho U.S.A.

Supersedes 01/2011

 

 

 

 

THIS MANUAL MUST BE LEFT WITH THE HOMEOWNER FOR FUTURE REFERENCE

WARNING

Improper installation, adjustment, alteration, service or maintenance can cause property damage, person- al injury or loss of life. Installation and service must be performed by a licensed professional installer (or equivalent), service agency or the gas supplier.

NOTICE

A thermostat is not included and must be ordered

separately.

DThe Lennox icomfort Toucht thermostat must be used in communicating applications.

DIn non−communicating applications, the Lennox ComfortSense® 7000 thermostat may be used, as well as other non−communicating thermostats.

In all cases, setup is critical to ensure proper sys- tem operation.

Field wiring for both communicating and non−com-

municating applications is illustrated in diagrams, which begin on Page 23.

Table of Contents

Unit Dimensions

2

Electrical

. . . . . . . . . . . . . . . . . . . . . . . . . . . .

21

Parts Arrangement

3

Integrated Control Settings

32

SL280DFV Gas Furnace

4

Blower Performance Data

35

Unit Start−Up

 

39

Shipping and Packing List

4

. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Gas Pressure Adjustment

40

 

 

Safety Information

4

Proper Combustion . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . .

40

Use of Furnace as a Construction Heater

5

High Altitude

. . . . . . . . . . . . . . . . . . . . . . . . . . . .

41

General

5

Other Unit Adjustments

42

Heating Sequence of Operation

42

Combustion, Dilution & Ventilation Air . . .

6

Service

 

44

Setting Equipment

10

. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Planned Service . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . .

47

Filters

11

Repair Parts List . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . .

47

Duct System

12

Integrated Control Diagnostic Codes

48

Venting

12

Program Unit Capacity/Size Mode

55

Gas Piping

19

Troubleshooting

. . . . . . . . . . . . . . . . . . . . . . . . . . . .

56

06/11

 

 

506710−01

 

*2P0611*

Page 1

*P506710-01*

 

 

 

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Lennox International Inc DAVE LENNOX SIGNATURE COLLECTION GAS FURNACE installation instructions Table of Contents
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DAVE LENNOX SIGNATURE COLLECTION GAS FURNACE, SL280DFV specifications

Lennox International Inc has made a significant mark in the heating, ventilation, and air conditioning (HVAC) industry, known for its commitment to innovation and energy efficiency. One of its standout products is the SL280DFV model, a high-efficiency gas furnace designed to meet the needs of modern homes.

The SL280DFV boasts an impressive Annual Fuel Utilization Efficiency (AFUE) rating of up to 80%. This rating indicates that the furnace converts 80% of the fuel it consumes into usable heat, making it a cost-effective choice for homeowners. The high efficiency not only reduces energy bills but also lessens the environmental impact by minimizing greenhouse gas emissions.

One of the key features of the SL280DFV is its two-stage gas valve operation. This technology allows the furnace to operate at two levels of heating output: low stage for milder days and high stage for extremely cold temperatures. This adaptability enhances comfort by maintaining more consistent indoor temperatures while also saving energy when full power is unnecessary.

Another innovative aspect of the SL280DFV is its variable-speed blower motor. This smart technology enables the furnace to adjust airflow based on the heating needs of a home, which promotes quiet operation and improved temperature consistency throughout living spaces.

The SL280DFV is equipped with a durable heat exchanger that is designed to withstand the rigors of daily use, contributing to the unit’s longevity. Additionally, the furnace features a smart ignition system that ensures reliable start-ups, so homeowners can depend on it through the coldest winter nights.

Safety is also a priority in the design of the SL280DFV. It includes various safety features such as a built-in flame sensor and advanced venting system, designed to avert hazardous situations and ensure optimal operation.

Furthermore, Lennox offers convenient installation and maintenance support, making the SL280DFV not only an efficient heating solution but also a practical choice for homeowners. With its blend of advanced technology, high efficiency, and reliability, the Lennox SL280DFV is an appealing option for those looking to upgrade their home’s heating system, promising comfort and peace of mind for many winters to come.
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