Lennox International Inc G40DF(X) SERIES specification

G40DF(X) Parts Identification

CABINET

BLOWER

MOTOR

CONTROL BOX

DURALOKTM HEAT

EXCHANGER

ASSEMBLY

COMBUSTION AIR

INDUCER

FLUE

COLLAR

TOP CAP

FLUE CHASE

BLOWER ACCESS

PANEL

SURELIGHTt

CONTROL BOARD

COMBUSTION AIR

PROVING

(PRESSURE) SWITCH

GAS

VALVE

GAS

MANIFOLD

LOWER ACCESS

PANEL

BURNERS

FIGURE 1

WARNING

Product contains fiberglass wool.

Disturbing the insulation in this product during installation, maintenance, or repair will expose you to fiberglass wool. Breathing this may cause lung cancer. (Fiberglass wool is known to the State of Cal0 ifornia to cause cancer.)

Fiberglass wool may also cause respiratory, skin, and eye irritation.

To reduce exposure to this substance or for further information, consult material safety data sheets available from address shown below, or contact your supervisor.

Lennox Industries Inc.

P.O. Box 799900

Dallas, TX 75379-9900

NOTE - This manual must be left with the equipment user.

WARNING

Do not set thermostat below 60°F (16°C) in heating mode. Setting thermostat below 60°F (16°C) reduces the number of heating cycles. Damage to the unit may occur that is not covered by the warranty.

WARNING

If overheating occurs or if gas supply fails to shut off, shut off the manual gas valve to the appliance before shutting off electrical supply.

CAUTION

Before attempting to perform any service or mainte0 nance, turn the electrical power to unit OFF at the disconnect switch.

Page 2

G40DF(X) SERIES specifications

Lennox International Inc. is renowned for its innovative HVAC solutions, and the G40DF(X) Series stands out as a significant breakthrough in the realm of gas furnaces. Designed for efficiency and reliability, the G40DF(X) Series is a product that embodies Lennox's commitment to performance, comfort, and sustainability.

One of the main features of the G40DF(X) Series is its efficiency rating. With an Annual Fuel Utilization Efficiency (AFUE) of up to 97%, this furnace is designed to maximize energy usage while minimizing waste. This high efficiency not only helps homeowners save on utility bills but also contributes to a reduced carbon footprint. The furnace's ability to convert more fuel into usable heat makes it a smart choice for anyone looking to upgrade their heating system.

The G40DF(X) Series also incorporates advanced technology to enhance its performance. One notable feature is the use of a two-stage heating process, which allows the furnace to adjust its output based on the current heating demand. By operating at a lower capacity during milder weather, the furnace provides a more consistent and comfortable temperature while using less energy. This staged heating capability reduces wear and tear on the unit, leading to increased longevity and fewer repair needs.

In addition to energy efficiency, the G40DF(X) Series prioritizes quiet operation. The advanced sound-dampening technology minimizes operational noise, ensuring that homeowners can enjoy a peaceful indoor environment. This is particularly beneficial for those living in close quarters or for families with young children who may be sensitive to noise.

Lennox also emphasizes safety in the design of the G40DF(X) Series. The furnace includes several safety features, such as an integrated pressure switch that monitors venting pressure to ensure proper operation. A reliable ignition system further enhances safety, preventing issues that can arise from faulty ignition and maintaining consistent performance.

The compact size of the G40DF(X) Series allows for flexible installation options, whether in a basement, attic, or closet. This adaptability makes it a suitable option for various home layouts. Additionally, Lennox offers a warranty on the furnace, providing peace of mind for homeowners regarding their investment.

In summary, Lennox International Inc.'s G40DF(X) Series is a top-tier gas furnace characterized by high efficiency, advanced technology, quiet operation, and built-in safety features. As a reliable heating solution, it meets the demands of modern homeowners while promoting energy conservation and comfort. With the G40DF(X) Series, Lennox continues to lead the way in HVAC innovation, ensuring that customers receive superior products that enhance their living environments.