7
Location Requirements and Considerations
T
O
PREVENT
POSSIBLE
EQUIPMENT
DAMAGE
,
PROPERTY
DAMAGE
,
PERSONAL
INJURY
OR
DEATH
,
THE
FOLLOWING
BULLET
POINTS
MUST
BE
OBSERVED
WHEN
INSTALLING
THIS
UNIT
.
WARNING
Follow the instructions listed below when selecting a furnace
location. Refer also to the guidelines provided in
Combustion
and Ventilation Air Requirements.
• Centrally locate the furnace with respect to the
proposed or existing air distribution system.
•
Ensure the temperature of the return air entering the
furnace is between 55°F and 100°F when the furnace
is heating.
• Provisions must be made for venting combustion
products outdoors through a proper venting system.
The length of flue pipe could be a limiting factor in
locating the furnace.
•
Ensure adequate combustion air is available for the
furnace. Improper or insufficient combustion air
can expose building occupants to gas combustion
products that could include carbon monoxide. Refer
to
Combustion and Ventilation Air Requirements.
•
The furnace must be level. If the furnace is to be set
on a floor that may become wet or damp at times,
the furnace should be supported above the floor on
a concrete base sized approximately 1-1/2” larger
than the base of the furnace.
•
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
chlorinated waxes or cleaners
chlorine-based swimming pool chemicals
carbon tetrachloride
water softening chemicals
swiming pool chemicals
deicing salts or chemicals
halogen type refrigerants
printing inks
cleaning solutions (such as perchloroethylene)
paint removers
varnishes
hydrochloric acid
cements and glues
antistatic fabric softeners for clothes dryers
masonry acid washing materials
• If the furnace is used in connection with a cooling
unit, install the furnace upstream or in parallel with the
cooling unit coil. Premature heat exchanger failure
will result if the cooling unit coil is placed ahead of
the furnace.
For vertical (upflow) applications, the minimum
cooling coil width shall not be less than furnace width
minus 1”. Additionally, a coil installed above an upflow
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 above the
floor. Protect the furnace from physical damage by
vehicles.
•
If the furnace is installed horizontally, ensure 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.
Top - 1"
Side
Clearance - 1"
Back - 0"
Front Clearance - 3"
Vent Pipe Clearance to Combustibles-
6" using Single Wall Connector or 1"
using B1 vent.
Figure 1
•
Adequate combustion/ventilation air must be supplied
to the closet. Improper or insufficient combustion air
can expose building occupants to gas combustion
products that could include carbon monoxide.
• Furnace must be
completely
sealed to floor or
base. Combustion/ ventilation air supply pipes must
terminate 12” from top of closet and 12” from floor
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.
