Keep flammable materials and vapors, such as
gasoline, away from furnace.
Failure to follow these instructions can result in death,
explosion, or fire.
IMPORTANT: Do not use the furnace as a heater in a building
under construction. The furnace can be severely damaged due to
the abnormal environment caused by construction. Chlorides
from sources such as paint, stain, or varnish; tile and counter
cements; adhesives; and foam insulation are abundant in a
structure under construction and can be highly corrosive. Low
return air temperature can cause condensation in the furnace and
other damage that can shorten the life of the furnace.
This furnace is designed to be located outdoors with
sufficient clearance for free entrance to the inlet and
discharge air openings. The location must also allow for
adequate service access. See "Minimum Clearances."
Where possible, select a location for the furnace which is
shaded from the direct rays of the sun most of the time. North
or east locations are usually most desirable. Position the
furnace to avoid direct contact with water, snow or ice from a
The furnace must be installed on a solid, level mounting pad
that will not settle or shift. Isolate the pad from the building
structure to avoid possible transmission of sound or vibration
from the furnace into the conditioned space.
The furnace foundation should be raised to a minimum of 3"
above finish grade. In areas which have prolonged periods of
temperature below freezing and snowfall, the furnace should
be elevated above the average snow line. If the furnace is to
be installed on a flat roof, it should be on a platform or other
support which will raise the base a minimum of 8" above the
surface of the flat roof.
This furnace can be installed on combustible Class A, Class
B or Class C roof covering material.
Avoid placing a furnace near areas such as sleeping quarters
or study rooms. Normal operating sound levels may be louder
than desired if the furnace is placed near certain rooms.
A. Supply air duct
B. Return air duct
C. Filter access panel
Minimum Clearance Requirements
High Altitude Installations
This furnace is approved for operation at altitudes from 0 to
4,500 ft above sea level without any required modifications.
For installations above 4,500 ft, the furnace input rate is to be
reduced per the requirements of the National Fuel Gas Code
(ANSI Z223.1/NFPA 54, latest edition), at the rate of 4 percent for
each 1,000 ft above sea level.
This furnace is not recommended for installation above 10,000 ft.
D. Evaporator coil access panel
E. Blower access panel
F. Burner access panel
Minimum - 0"
Recommended - 3"