6
•
Exposure to contaminated combustion air will result
in safety and performance-related problems. Do
not install the furnace where the combustion air is
exposed to the following substances:
permanent wave solutions
carbon tetrachloride
deicing salts or chemicals
cleaning solutions (such as perchloroethylene)
paint removers
cements and glues
chlorinated waxes or cleaners
water softening chemicals
halogen type refrigerants
chlorine-based swimming pool chemicals
printing inks
varnishes
hydrochloric acid
antistatic fabric softeners for clothes dryers
•
Seal off a
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.
•
For vertical (upflow or downflow) applications, the
minimum cooling coil width shall not be less than
furnace width minus 1”. Additionally, a coil installed
above an upflow furnace or under a counterflow
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.
For upflow applications, the front of the coil and
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)
above the floor. Protect the furnace from physical
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.
•
Do not connect this furnace to a chimney flue that
serves a separate appliance designed to burn solid
fuel.
•
On Counterflow Installations, the air conditioning coil
must be downstream on the supply (positive) side of
the furnace heat exchanger.
•
Counterflow Installation over a noncombustible floor.
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 base and floor by using a silicone rubber
caulking compound or cement grout.
•
Counterflow Installation over a combustible floor.
If installation over a combustible floor becomes
necessary, use an accessory subbase (see
Specification Sheet applicable for your model for
details.) A special accessory subbase must be
used for upright counterflow unit installations over
any combustible material including wood. Refer to
subbase instructions for installation details. Follow the
instructions with the subbase for proper installation.
Do not install the furnace directly on carpeting, tile, or
other combustible material other than wood flooring.
NOTE: The subbase will not be required if an air
conditioning coil is installed between the supply
air opening on the furnace and the floor.
Clearances and Accessibility
NOTES:
•
For servicing or cleaning, a 24” front clearance is
required.
•
Unit connections (electrical, flue and drain) may
necessitate greater clearances than the minimum
clearances listed above.
•
In all cases, accessibility clearance must take
precedence over clearances from the enclosure
where accessibility clearances are greater.
NOTES:
•
For servicing or cleaning, a 24” front clearance is
required.
•
Unit connections (electrical, flue and drain) may
necessitate greater clearances than the minimum
clearances listed above.
•
In all cases, accessibility clearance must take
precedence over clearances from the enclosure
where accessibility clearances are greater.
Clearance in accordance with local
installation codes, the requirements of the gas
supplier and the manufacturer’s installation
instructions.
Dégaugement conforme aux codes d’installation
locaux, aux exigences du fournisseur de gaz et
aux instructions d’installation du fabricante.
