GMEC96 Installation Manual

7
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.
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
 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 source are located not less than 18 inches
(457 mm) a     
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.
 
serves a separate appliance designed to burn solid
fuel.
 
coil must be downstream on the supply (positive)
side of the furnace heat exchanger.
Counterow 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
becomes necessary, use an accessory subbase (see

details.) A special accessory subbase must be

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

(: The subbase will not be required if an air
conditioning coil is installed between the supply



For servicing or cleaning, a 24” front clearance is
required.
 
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.

For servicing or cleaning, a 24” front clearance is
required.
 
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.