7
Top - 1"
Side
Clearance - 1"
Back - 0"
Front Clearance - 3"
• Adequate combustion/ventilation air must be supplied
to the closet.
• Furnace must be completely sealed to floor or
base. Combustion/ ventilation air supply pipes must
of closet. DO NOT remove solid base plate for side
return.
• Return air ducts must be completely sealed to
the furnace and terminate outside the enclosure
surfaces.
Clearance in accordance with local installation codes, the
requirements of the gas supplier and the manufacturer’s
installation instructions.
exigences du fournisseur de gaz et aux instructions
d’installation du fabricant.
Unobstructed front clearance of 24” is recom-
mended.
TOP
B1-VENT SINGLE
(PLENUM)
1" 6" 1" 3" 0" 1"
horizontal on either the left or right side panel. Do not install
this furnace on its back. For vertically installed upow furnac-
es, return air ductwork may be attached to the side panel(s)
and/or basepan. For horizontally installed upow furnaces,
return air ductwork must be attached to the basepan. For
counterow furnaces, return ductwork must be attached to
the top end of the blower compartment.
NOTE: Ductwork must never be attached to the back of the
furnace.
minimum cooling coil width shall not be less than
furnace width minus 1”. Additionally, a coil installed
furnace may be the same width as the furnace or may
be one size larger than the furnace. Example: a “C”
width coil may be installed with a “B” width furnace.
furnace must face the same direction.
• If the furnace is installed in a residential garage,
position the furnace so that the burners and ignition
source are located not less than 18 inches (457 mm)
damage by vehicles.
• If the furnace is installed horizontally, the furnace
horizontally into the heat exchanger. Do not install the
unit with the access doors on the “up/top” or “down/
bottom” side of the furnace.
serves a separate appliance designed to burn solid
fuel.
must be downstream from the heat exchanger of the
furnace.
•
Before setting the furnace over the plenum opening,
ensure the surface around the opening is smooth and
level. A tight seal should be made between the furnace
compound or cement grout.
If installation over a combustible floor becomes
necessary, use an accessory subbase (see
details). A special accessory subbase must be used
combustible material including wood. Follow the
instructions with the subbase for proper installations.
Do not install the furnace directly on carpeting, tile, or
(NOTE: The subbase will not be required if an air
conditioning coil is installed between the supply air
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