Lennox SunSource User manual

Introducing
a new ray
of light
in home
comfort.
The industry’s first
solar-assisted
central heat pump.

2
Source of
alternative energy
• Patent-pending solar-assist
technology uses a combination
of solar energy and electricity
to reduce peak demand on
home electric usage
• Operates in a wide range of
sunlight and temperature
conditions
• ENERGY STAR®qualified
Source of
innovative comfort
• Delivers even heating and
cooling in every room*
• Highly reliable, with patented
SmartHinge™panels that require
little routine maintenance
Your first step toward living off the grid.
Far more affordable than a full-house solar system, the SunSource™Comfort System, part of the
Dave Lennox Signature®Collection, is a first-of-its-kind innovation that takes you away from the
burden of high utility bills and moves you solidly toward the future.
How it Works
Draws energy from the sun
During peak daylight hours, the
SunSource Comfort System gets help
from a solar panel to heat and cool
your home. It uses renewable solar
energy to power the outdoor fan
motor, reducing the utility-provided
electricity needed for operation. The
solar-assist increases the system
efficiency, reducing the power
consumed by as much as 8%.
*Based on improved temperature control offered
by two-stage compressor operation.

Solar by day. Electric by night. Savings all year.
Taking a step to conserve energy with a SunSource Comfort System can save you
hundreds of dollars on your utility bills every year.
A SunSource Comfort System makes use of all available solar energy to reduce
electric consumption—full sun is not a requirement. On days with limited sun
exposure, the SunSource Comfort System continues to operate efficiently using
metered electricity provided by your power company.
That means no matter where you live, the SunSource Comfort System is a viable
renewable energy solution that can make a positive change in your home
environment…and global environment.
**Source: U.S. Energy Information Administration, 2007
Solar power is a viable energy source
in nearly every U.S. city. This map
shows the amount of electricity
capable of being produced by 2007
levels of available solar radiation.
Source: Solar Energy Industries Association
Renewable Energy Coast-to-Coast
Heating and
Air Conditioning
54%**
3
The amount of the sun’s energy that reaches the surface of
the Earth every hour is greater than the total amount of
energy that the world’s human population uses in a year.
Source: U.S. Department of Energy, 2008
Studies have shown that more
than half of your household
energy use goes to heating
and cooling.**

4
Dave Lennox Signature®Collection XPG20 Specifications
The SunSource™solar-assisted heat pump, tested according to the Department of Energy central heat pump test procedure, and with zero solar power input, yields these performance metrics:
With No Solar-Assist
Outdoor unit
model
Indoor unit
model SEER EER
Cooling Capacity
(BTUH)
HSPF
(Region IV)
Heating Capacity
(BTUH)
Sound Rating
(dBA)
Dimensions
HxWxD (in.)
Dimensions
HxWxD (mm)
XPG20-036 CBX32MV-048 18.20*** 12.7 37,800 9.70*** 34,200 72 37 x 35-1/2 x 39-1/2 940 x 902 x 1003
When this same equipment is tested by the same procedure, but with 170 watts of DC power (simulating power input from a nominal 205 watt solar module) the standard test procedure yields
these performance metrics:
With 170 Watt DC Solar-Assist
XPG20-036 CBX32MV-048 20.00 13.7 38,000 10.70 34,200 75 37 x 35-1/2 x 39-1/2 940 x 902 x 1003
In actual applications, the availability and intensity of solar energy varies from locale to locale. The above metrics suggest lower and upper bounds for estimating performance.
Note: Due to Lennox’ ongoing commitment to quality, all specifications, ratings and dimensions are subject to change without notice.
16.00-18.20
21.0013.00
THIS MODEL
Proper sizing and installation of equipment
is critical to achieve optimal performance.
Split system air conditioners and heat
pumps must be matched with appropriate
coil components to meet ENERGY STAR®
criteria. Ask your Lennox dealer for details,
or visit www.energystar.gov.
Higher efficiency plus superior comfort with less noise.
Now it’s possible for you to reduce the environmental impact of your home’s heating and cooling system without sacrificing
your comfort. With efficiency ratings of up to 18.20 SEER and 9.70 HSPF***, Lennox’ SunSource™heat pump takes heating
and cooling technology to new heights with help from renewable solar power.
Optimized for use with the
Humiditrol®whole-home
dehumidification system
As part of a complete comfort package, the Humiditrol
system delivers a level of humidity control never before
available. Less moisture in the air not only feels better, it
improves overall indoor air quality, too.
What a difference quiet makes
The SunSource heat pump is engineered with Lennox’
exclusive SilentComfort™technology for quiet performance
day in and day out. A patent-pending fan design, two-stage
operation and an insulated compressor compartment also
help keep sound at a minimum.
Conserves energy while preserving
the environment
The SunSource heat pump is designed with a two-stage
scroll compressor that uses R410A refrigerant, which meets
the U.S. Environmental Protection Agency’s standards
for ozone and environmental safety.
Reducing your carbon footprint—one step at a time
Every SunSource heat pump will offset 376 pounds of CO2per year.
That’s the equivalent of planting seven mature trees, or carpooling
to work one day each week. If thousands of people joined in, the
change would substantially reduce environmental emissions.
Choosing an ENERGY STAR®product like the
XPG20 SunSource™Comfort System can help
you improve comfort and save energy costs. You
may also be able to qualify for utility rebates and
tax credits. By creating a more efficient home environment,
you are contributing to a cleaner global environment.
***SEER and HSPF are for operation without solar power input.

First-of-its-kind system. Ahead-of-the-curve features.
SilentComfort™Fan Grille –
Uses patent-pending, vortex-suppression technology to reduce
sound of airflow exiting unit, providing a quieter environment
outside your home.
Electronically Commutated Motor (ECM) –
Uses utility-provided electricity to power the system at night
and whenever sunlight is unavailable.
Factory-Installed Lennox®System Operations Monitor –
Continually reviews system performance to allow fast
troubleshooting, which assures you of worry-free performance.
Patent-Pending Fan-Drive System –
Uses a combination of solar energy and electricity to reduce
peak demand on home electric usage.
Two-Stage Scroll Compressor –
Operates at low stage most of the time for quieter, more efficient
performance. Plus, it cools your home using the ozone-responsible
R410A refrigerant.
Insulated Compressor Compartment –
Minimizes operating sounds with innovative materials
and industry-leading, vibration-isolating mounts.
High-Efficiency Outdoor Coil –
Provides exceptional heat transfer and low air resistance for
high-efficiency operation that can lower your cooling bills.
SmartHinge™Louvered Coil Protection –
Allows quick, easy access to interior components from all sides,
so the unit can be serviced in minimal time, saving you money.
Single Solar Panel – Provides freely available renewable energy
to offset the electric usage of the heating and cooling system.
SunSource™
Comfort
System
Up to 18.20 SEER
and 9.70 HSPF*
First comfort
system of its kind.
5
Warranty
10-year limited warranty on the compressor and all
remaining covered components. Excludes solar panel.
Note: Applies to residential applications for condenser and heat pump only.
See actual warranty certificate for details.
*SEER and HSPF are for operation without solar power input.

PC56258(49W46) XPG20 2/09
© Lennox Industries Inc. 2009
Visit us at www.lennox.com, or contact us at 1-800-9-LENNOX.
1Air conditioner or heat pump
2Thermostat
3Furnace or air handler
4Filtration device
5Germicidal light
6Indoor coil
7Humidifier
8HEPA 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.