Lenoxx Electronics G51 User Manual

G51 High-Efficiency Gas Furnace ◆ 92.1% AFUE
LENNOX’ ELITE® SERIES
Home Comfort Systems
G51
Single-stage, high-efficiency furnace
Elite® Series G51 Furnace
High efficiency can save you
hundreds of dollars each year
SureLight® Control delivers starting reliability
Low-speed, continuous fan setting provides a consistent flow of air
ENERGY STAR® qualified
Innovation never felt so good.
Maximum comfort is yours with the Elite® Series G51 gas furnace. The G51
surrounds you in warmth, without undue noise. Its sound-absorbing,
insulated cabinet delivers smooth, quiet operation.
ENGINEERED FOR COMFORT AND EFFICIENCY
The G51 has a low-speed, continuous fan setting that provides maximum
comfort with remarkable efficiency, which means you’ll stay warm for less.
3-YEAR HEATING SAVINGS
Efficient Can give you
significant energy savings year
after year
The G51 gas furnace not only
keeps you warm—it also reduces
your energy costs. With an efficiency
rating of 92.1% AFUE (Annual
Fuel Utilization Efficiency), the
G51 offers more comfort for
your energy dollars.
$4000
92.1%
vs. 55%
$3378
$2088
92.1%
vs. 65%
$3000
$2500
$2000
$1500
$1000
$500
0
AFUE
92.1% efficient G51 gas furnace vs. 55% and 65% equivalent AFUE units
EFFICIENCY RATING
92.1% AFUE (Annual Fuel
Utilization Efficiency).
WARRANTY*
Limited lifetime warranty on the heat exchanger.
5-year limited warranty on all remaining covered components.
*Applies to residential applications only. See actual warranty certificate for details.
2
2
This chart depicts potential energy savings you can expect from the G51 gas furnace versus older furnaces with lower efficiency ratings. Criteria used in this example are 2,000 full-load heating hours, with a 60,000-Btuh heating design load and $1.281 ccf for gas. Your actual savings will vary depending on the weather, local fuel rates and your lifestyle.
Source: U.S. Department of Energy national average energy rates.
Reliable Designed and tested to ensure optimal performance
Every component of the G51 is rigorously tested in our dedicated research lab.
As a result, you can count on your new furnace to deliver the highest possible
level of reliability and performance.
THIS MODEL
92.1%
INNOVATIVE FEATURES FOR ENHANCED COMFORT AND EFFICIENCY
Insulated Blower Compartment –
Reduces sound for quieter operation.
Duralok Plus® Heat Exchanger –
Made of high-quality, patented ArmorTuf™
aluminized steel. Life-tested to 2-1/2 times agency
requirements (ANSI standard Z21.47) for long
life and durability.
SureLight® Igniter –
Made of silicon nitride for reliable,
long-life performance
Robust Stainless Steel Secondary Heat Exchanger
Time-tested design allows the furnace to achieve
high efficiency levels by capturing additional heat.
SureLight Control Board –
Controls furnace operation to
ensure reliable, efficient performance.
Durable Steel Cabinet –
Built to last and coated with high-quality, textured-
paint finish.
G51
92.1% AFUE
Elite® Series G51 Specifications
G51 24B-045 36B-045 36B-070 36C-090 48C-090 60C-090
AFUE 92.1% 92.1% 92.1% 92.1% 92.1% 92.1% Dimensions HxWxD (in.) 40 x 17-1/2 x 28-1/2 40 x 17-1/2 x 28-1/2 40 x 17-1/2 x 28-1/2 40 x 17-1/2 x 28-1/2 40 x 21 x 28-1/2 40 x 21 x 28-1/2 HxWxD (mm) 1016 x 446 x 724 1016 x 446 x 724 1016 x 446 x 724 1016 x 446 x 724 1016 x 533 x 724 1016 x 533 x 724
G51 48C-110 60C-110 60D-135 AFUE 92.1% 92.1% 92.1% Dimensions HxWxD (in.) 40 x 21 x 28-1/2 40 x 21 x 28-1/2 40 x 24-1/2 x 28-1/2 HxWxD (mm) 1016 x 533 x 724 1016 x 533 x 724 1016 x 622 x 724
Note: Due to Lennox’ ongoing commitment to quality, all specifications, ratings and dimensions are subject to change without notice.
Many Lennox® home comfort systems meet
®
ENERGY STAR when used with appropriate components. Ask your dealer for details.
requirements
Lennox is proud of the fact that these products have earned the Good Housekeeping Seal.
3
1 Air conditioner or heat pump 2 Thermostat 3 Furnace or air handler 4 Filtration device 5 Germicidal light 6 Indoor coil 7 Humidifier 8 HEPA bypass filtration system 9 Energy recovery ventilator  Supply duct
 Return duct  Dehumidifier system  Residential generator
CUSTOMIZE YOUR COMFORT
Lennox® heating, cooling and indoor air quality products are designed to
provide efficient, economical comfort—not only as individual units, but also
together as an integrated system. This combined network of products delivers
on every comfort count, from consistent temperatures and balanced humidity to improved indoor air quality. Lennox
also offers a line of residential generators, which provide safe, reliable standby power in the event of outages.
DEALERS YOU CAN COUNT ON
Choosing the right dealer for your home’s heating, cooling and air quality needs is every bit as important as choosing the
right brand. We think you’ll agree our independent dealers are a big reason you can count on quality customer service
whenever you call. Your Lennox dealer’s dedication to quality shows in his knowledge, training and expertise in designing
the right system for your home, installing it properly and keeping it running perfectly for many years to come.
© Lennox Industries Inc. 2007
Visit us at www.lennox.com, or contact us at 1-800-9-LENNOX.
PC55478(48M85) G5 1 09/0 8
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