PRODUCT DESIGN
34
Rev. 0
A copy of the National Fuel Gas Code (NFPA 54/ANSI
Z223.1) can be obtained from any of the following:
American National Standards Institute
1430 Broadway
New York, NY 10018
National Fire Protection Association
1 Batterymarch Park
Quincy, MA 02269
American Gas Association
1515 Wilson Boulevard
Arlington, VA 22209
A copy of the CAN/CGA B149 Installation Codes can be
obtained from:
Canadian Gas Association
55 Scarsdale Road
Don Mills, Ontario, Canada M3B, 2R3
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
General
WARNING
To prevent possible death, personal injury, equipment
damage, or property damage 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.
•
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 fur-
nace is heating.
•
Provide provisions for venting combustion products
outdoors through a proper venting system. Special
consideration should be given to vent/flue pipe rout-
ing and combustion air intake pipe when applicable.
Refer to
the Vent/Flue Pipe and Combustion Air Pipe
-Termination Locations section for appropriate ter-
mination locations. Also, refer to the
Vent/Flue Pipe
and Combustion Air Pipe -Termination Locations
section to determine if the piping system from fur-
nace to termination can be accomplished within the
guidelines given. Note: The length of flue and/or com-
bustion air piping can be a limiting factor in the loca-
tion of the furnace.
•
Locate the furnace so that the condensate can be
piped at a downward slope between furnace and
drain. Do not locate the furnace or its condensate
drainage system in any area subject to below freez-
ing temperatures without proper freeze protection.
Refer to
the Condensate Drain Lines and Trap sec-
tion for further details.
•
Set the furnace on a level floor to enable proper con-
densate 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 for leveling of hori-
zontal furnaces.
•
Ensure upflow or horizontal furnaces are not installed
directly on carpeting, or any other combustible ma-
terial. 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 lo-
cated 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
•
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 en-
