Installation Guide
7
locations and to determine if the piping system
from furnace to termination can be accomplished
within the guidelines given. The length of
factor in the location of the furnace.
condensate drainage system in any area subject to
below freezing temperatures without proper freeze
protection. Refer to Condensate Drain Lines and
Trap for further details.
• Ensure adequate combustion air is available for the
can expose building occupants to gas combustion
products that could include carbon monoxide. Refer
to Combustion and Ventilation Air Requirements.
on a concrete base sized approximately 1-1/2”
larger than the base of the furnace. Refer to the
Horizontal Applications and Considerations for
leveling of horizontal furnaces.
• Ensure upflow or horizontal furnaces are not
installed directly on carpeting, or any other
combustible material. The only combustible
material allowed is wood.
• A special accessory subbase must be used for upright
A
subbase will not be required if an air conditioning
coil is located beneath the furnace between the
• Exposure to contaminated combustion air will result
install the furnace where the combustion air is exposed
to the following substances:
permanent wave solutions
chlorinated waxes or cleaners
chlorine-based
carbon tetrachloride
water softening chemicals
swimming pool chemicals
deicing salts or chemicals
halogen type refrigerants
printing inks
paint removers
varnishes
hydrochloric acid
cements and glues
antistatic fabric softeners for clothes dryers
masonry acid washing materials
non-direct vent furnace if it is installed
near an area frequently contaminated by any of
the above substances. This protects the non-direct
vent furnace from airborne contaminants. To
ensure that the enclosed non-direct vent furnace
has an adequate supply of combustion air, vent
from a nearby uncontaminated room or from
outdoors. Refer to the Combustion and Ventilation
Air Requirements for details.
• If the furnace is used in connection with a cooling coil
unit, install the furnace upstream or in parallel with
the cooling coil unit. Premature heat exchanger failure
will result if the cooling unit is placed ahead of the
furnace.
the minimum cooling coil width shall not be less
than furnace width minus 1”. Additionally, a
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
a
damage by vehicles.
• If the furnace is installed horizontally, ensure the
access doors are not on the “up/top” or “down/
bottom” side of the furnace.
serves a separate appliance designed to burn solid
fuel.
side of the furnace heat exchanger.
• Counterow Installation over a noncombustible
oor. Before setting the furnace over the plenum
opening, ensure the surface around the opening
is smooth and level. A tight seal should be made
silicone rubber caulking compound or cement
grout.
• Counterflow Installation over a combustible
floor. If installation over a combustible floor
any combustible material including wood. Refer
to subbase instructions for installation details.
carpeting, tile, or other combustible material other
: The subbase will not
be required if an air conditioning coil is installed
between the supply air opening on the furnace and