INSTALLATION CONSIDERATIONS
14
American National Standards Institute
1430 Broadway
New York, NY 10018
National Fire Protection Association
1 Batterymarch Park
Quincy, MA 02269
CSA International
8501 East Pleasant Valley
Cleveland, OH 44131
A copy of the CAN/CGA B149 Installation Codes can be
obtained from:
CSA International
178 Rexdale Boulevard
Etobicoke, Ontario, Canada M9W, 1R3
The rated heating capacity of the furnace should be greater
than or equal to the total heat loss of the area to be heated.
The total heat loss should be calculated by an approved
method or in accordance with “ASHRAE Guide” or “Manual
J-Load Calculations” published by the Air Conditioning Con-
tractors of America.
Location Requirements and Considerations
WARNING
T
O PREVENT POSSIBLE EQUIPMENT DAMAGE, PROPERTY DAMAGE, PERSONAL
INJURY OR DEATH, THE FOLLOWING BULLET POINTS MUST BE OBSERVED
WHEN INSTALLING THE UNIT.
Follow the instructions listed below when selecting a fur-
nace location. Refer also to the guidelines provided in the
Combustion and Ventilation Air Requirements
section in this
manual or the installation instructions for details.
•
Centrally locate the furnace with respect to the pro-
posed 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.
•
If the furnace is installed in an application where the
typical operating sound level of a furnace is deemed
objectionable, an optional sound reduction kit is avail-
able. Consult your local distributor for more details.
•
Provide provisions for venting combustion products
outdoors through a proper venting system. Special
consideration should be given to vent/flue pipe routing
and combustion air intake pipe when applicable.
90% Furnaces:
Refer to
the
Vent/Flue Pipe and Com-
bustion Air Pipe -Termination Locations
section in this
manual or the installation instructions for appropriate
termination locations. Also for 90% furnaces, refer to
the
Vent/Flue Pipe and Combustion Air Pipe -Termi-
nation Locations
section in this manual or the instal-
lation instructions to determine if the piping system
from furnace to termination can be accomplished
within the guidelines given
. NOTE:
The length of flue
and/or combustion air piping can be a limiting factor
in the location of the furnace.
•
Locate the 90% furnace so that the condensate can
be piped at a downward slope away from the furnace
to the drain. Do not locate the furnace or its conden-
sate drainage system in any area subject to below
freezing temperatures without proper freeze protec-
tion. Refer to
the
Condensate Drain Lines and Trap
section in this manual or the installation instructions
for further details.
•
Set the 90% furnace on a level floor to enable proper
condensate drainage. If the floor becomes wet or damp
at times, place the furnace above the floor on a con-
crete base sized approximately 1-1/2" larger than the
base of the furnace. Refer to the
Horizontal Applica-
tions and Considerations
section in this manual or
the installation instructions for leveling of horizontal
furnaces.
•
Ensure upflow or horizontal furnaces are not installed
directly on carpeting, or any other combustible mate-
rial. The only combustible material allowed is wood.
•
A special accessory subbase must be used for up-
right counterflow unit installations over any combus-
tible material (including wood). Refer to subbase in-
structions for installation details. (
NOTE:
A subbase
will not be required if an air conditioning coil is located
beneath the furnace between the supply air opening
and the combustible floor.
•
Exposure to contaminated combustion air will result
in safety and performance-related problems. Do not
install the furnace where the combustion air is ex-
posed to the following substances:
chlorinated waxes or cleaners
chlorine-based swimming pool chemicals
water softening chemicals
deicing salts or chemicals
carbon tetrachloride
halogen type refrigerants
cleaning solutions (such as perchloroethylene)
printing inks
paint removers
varnishes
hydrochloric acid
cements and glues
antistatic fabric softeners for clothes dryers
and masonry acid washing materials
•
Isolate a nondirect furnace from an area contaminated
by any of the above substances. This protects the
non-direct vent
furnace from airborne contaminants.
