PRODUCT DESIGN
19
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 fur-
nace 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 rout-
ing and combustion air intake pipe when applicable.
80% Furnaces:
All installations must be vented in
accordance with National Fuel Gas Code, NFPA 54/
ANSI Z223.1 - lateset edition. In Canada the furnaces
must be vented in accordance with the National Stan-
dard of Canada, CAN/CGA B149.
•
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 enclosed
non-direct
vent
furnace has an adequate
supply of combustion air, vent from a nearby uncon-
taminated room or from outdoors. Refer to the
Com-
bustion and Ventilation Air Requirements
section in
this manual or the installation instructions for details.
•
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 fail-
ure will result if the cooling unit coil is placed ahead
of the furnace.
•
If the furnace is installed in a residential garage, po-
sition 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.
Clearances and Accessibility
Installations must adhere to the clearances to combustible
materials to which this furnace has been design certified.
The minimum clearance information for this furnace is pro-
vided on the unit’s clearance label. These clearances must
be permanently maintained. Refer to Specification Sheet
for minimum clearances to combustible materials. Clear-
ances must also accommodate an installation’s gas, elec-
trical, and drain trap and drain line connections.
NOTE:
In
addition to the required clearances to combustible materi-
als, a minimum of 24 inches service clearance must be
available in front of the unit.
