# 45464K003 Page 3
Inspection of Shipment
This furnace is shipped in one package, completely
assembled and wired. The thermostat is shipped in a
separate carton when ordered.
Upon receipt of equipment, carefully inspect it for possible
shipping damage. If damage is found, it should be noted on
the carrier’s freight bill. Damage claims should be filed with
the carrier immediately. Claims of shortages should be
filed with the seller within 5 days.
Check the rating plate for correct model number, type of
gas, and input.
Clearances
All servicing and cleaning of the furnace can be performed
from the front. If installed in a closet or utility room, provide
18" clearance in front for service if the door to the room is
not in line with the front of the furnace.
All models are suitable for installation at reduced clear-
ances to combustibles as noted in the tables in Figure 2.
Where servicing clearances are greater than clearances to
combustibles, servicing clearances take precedence.
G1N80BU, G1N80BT, CG80UB, and CG80TB models, and
horizontally installed G1N80BR and CG80RB models may
be installed on wood flooring, but shall not be installed
directly on carpeting, tile, or other combustible material
other than wood flooring.
G1N80BR and CG80RB models installed as counterflow
(downflow) units may be installed on combustible flooring
provided a special combustible floor base is used. Refer to
the Counterflow (Downflow) Installations section begin-
ning on page 10 for more information on using the special
base assembly.
Location
All models are suitable for closet or utility room installation.
The furnace must be installed so that electrical compo-
nents are protected from water.
The furnace is suitable for installation in buildings con-
structed on-site. The furnace should be centralized in
respect to the heat distribution system as much as
practicable. When installed in a utility room, the door
should be wide enough to allow the largest part of the
furnace to enter, or permit the replacement of another
appliance, such as a water heater.
A gas-fired furnace for installation in a residential garage
must be installed so the burner(s) and the ignition source
are located not less than 18" above the floor. The furnace
is to be located or protected to avoid physical damage by
vehicles.
G1N80BR, G1N80BT, CG80RB, and CG80TB models
installed in the horizontal position are approved for attic
installations. If the furnace is to be installed in an attic
or other insulated space, it must be kept free and
clear of insulating materials. When a furnace is
installed in conjunction with an evaporator coil in an
attic or above a finished ceiling where condensate
overflow could result in property damage, a drain
pan should be provided under the units as specified
by most local building codes.
Figure 2
Minimum Clearances to Combustibles
(all measurements in inches)
Upflow and Counterflow Installations
Horizontal Installations
(G1N80BR and CG80RB models)
1
May be 2" when Type B-1 vent pipe is used.
2
May be 1" when Type B-1 vent pipe is used.
3
Where values greater than 0 are shown, may be 0"
when Type B-1 vent pipe is used.
Horizontal Installations
(G1N80BT and CG80TB models)
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