7
Section X, Condensate Drain Lines and Trap
for further
details.
•
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
Section V,
Combustion and Ventilation Air Requirements.
•
Set the 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 concrete
base sized approximately 1-1/2" larger than the base of
the furnace. Refer to the
Section VII, 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.
•
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. (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 exposed 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 enclosed
non-direct
vent
furnace has an adequate supply of
combustion air, vent from a nearby uncontaminated room
or from outdoors. Refer to the
Section V, Combustion and
Ventilation Air Requirements
for details.
•
If the furnace is used in connection with a cooling unit, install
the furnace upstream or in parallel with the cooling unit.
Premature heat exchanger failure will result if the cooling
unit is placed ahead of the furnace.
•
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, the furnace access
doors must be vertical so that the burners fire horizontally
into the heat exchanger. Do not install the unit with the
access doors on the “up/top” or “down/bottom” side of the
furnace.
WARNING
T
O PREVENT PROPERTY DAMAGE, PERSONAL INJURY OR DEATH DUE TO FIRE,
DO NOT INSTALL THIS FURNACE IN A MOBILE HOME, TRAILER, OR RECREATIONAL
VEHICLE.
To ensure proper furnace operation, install, operate and maintain
the furnace in accordance with these installation and operation
instructions, all local building codes and ordinances. In their ab-
sence, follow the latest edition of the National Fuel Gas Code
(NFPA 54/ANSI Z223.1), and/or CAN/CSA B149 Installation Codes,
local plumbing or waste water codes, and other applicable codes.
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
CSA International
8501 East Pleasant Valley
Cleveland, OH 44131
A copy of the CAN/CSA B149 Installation Codes can also be ob-
tained 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 Contractors of America.
IV. LOCATION REQUIREMENTS & CONSIDERATIONS
G
ENERAL
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 furnace loca-
tion. Refer also to the guidelines provided in
Section V, 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.
•
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. Refer to
Section IX, Vent/Flue Pipe and Combustion Air Pipe -
Termination Locations
for appropriate termination locations
and 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 furnace so condensate flows downwards to
the drain. Do not locate the furnace or its condensate
drainage system in any area subject to below freezing
temperatures without proper freeze protection. Refer to
