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Requirements
All G26 units are CSA International certified to ANSI
Z21.47 and CSA 2.3 standards.
In the USA, installation of Lennox gas central furnaces must
conform with local building codes. In the absence of local
codes, units must be installed according to the current NaĆ
tional Fuel Gas Code (ANSI-Z223.1) in the United States.
The National Fuel Gas Code is available from the following
address:
American National Standards Institute, Inc.
11 West 42nd Street
New York, NY 10036
In Canada, installation must conform with current National
Standard of Canada CAN/CGA-B149.1 Installation Code
for Natural Gas Burning Appliances and Equipment" and
CAN/CGA-B149.2 Installation Code for Propane Gas
Burning Appliances and Equipment," local plumbing or
waste water codes and other applicable local codes.
Adequate clearance must be made around the air openĆ
ings into the vestibule area. Provisions must be made for
proper operation and for combustion air and ventilation air
supply according to the current National Fuel Gas Code or
CAN/CGA-B149 standards.
This furnace is CSA International certified for installation
clearances to combustible material as listed on the unit rating
plate and in table 1.
TABLE 1
Clearances Location Inches (mm)
Front 24 (610)
Service access
Condensate side
3 (76)
(from side of unit)
Top 1 (25)
To combustible
Exhaust 0
materials
Side, rear, and front 0
Floor 0*
*Appliance shall not be installed directly on carpeting, tile or other combustible mateĆ
rial other than wood flooring.
NOTE-Service access clearance must be maintained.
NOTE - For installation on combustible floors, the furnace shall
not be installed directly on carpeting, tile, or other combustible
material other than wood flooring.
Accessibility and service clearances must take preceĆ
dence over fire protection clearances.
For installation in a residential garage, the furnace must be
installed so that the burner(s) and the ignition source are loĆ
cated no less than 18 inches (457 mm) above the floor. The
furnace must be located or protected to avoid physical dam-
age by vehicles. When a furnace is installed in a public garage,
hangar, or other building that has a hazardous atmosphere,
the furnace must be installed according to recommended
good practice requirements and current National Fuel Gas
Code or CAN/CGA B149.1 and B149.2 standards.
The furnace must be adjusted to obtain a temperature rise
within the range specified on the unit rating plate.
When installed, the furnace must be electrically grounded
according to local codes. In addition, in the United States,
installation must conform with the current National Electric
Code, ANSI/NFPA No. 70. The National Electric Code
(ANSI/NFPA No. 70) is available from the following ad-
dress:
National Fire Protection Association
1 Battery March Park
Quincy, MA 02269
Wiring to be done in the field, between the furnace and deĆ
vices not attached to the furnace or between separate deĆ
vices which are field-installed and located, shall conform
with the temperature limitation for type T wire [63°F (17°C)
rise] when installed in accordance with these instructions.
G26 unit must be installed so that electrical components
are protected from water.
When the furnace is installed so that supply ducts carry air
circulated by the furnace to areas outside of the space conĆ
taining the furnace, return air shall be handled by a duct(s)
sealed to the furnace casing and terminating out-side
space containing furnace.
WARNING
Product contains fiberglass wool.
Disturbing the insulation in this product during
installation, maintenance, or repair will expose you
to fiberglass wool dust. Breathing this may cause
lung cancer. (Fiberglass wool is known to the State
of California 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 - G26 series units must not be used as a construcĆ
tion heater during any phase of construction. Very low re-
turn air temperatures, harmful vapors and misplacement of
the filters will damage the unit and lower its efficiency.
General
These instructions are intended as a general guide and do not
supersede local codes in any way. Consult authorities having
jurisdiction before installation.
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