Instruction manual

14
• All terminations must be located at least 12 inches
above ground level or the anticipated snow level.
• Vent terminations must terminate at least 3 feet above
any forced air inlet located within 10 feet.
NOTE: This provision does not apply to the combus-
tion air intake termination of a direct vent application.
• The vent termination of a non-direct vent application
must terminate at least 4 feet below, 4 feet horizontally
from, or 1 foot above any door, window, or gravity air
inlet into any building.
• The vent termination of a direct vent application must
terminate at least 12 inches from any opening through
which flue gases may enter a building (door, window,
or gravity air inlet).
• The vent termination of vent pipe run vertically through
a roof must terminate at least 12 inches above the roof
line (or the anticipated snow level) and be at least 12
inches from any vertical wall (including any anticipated
snow build up).
• A vent termination shall not terminate over public
walkways or over an area where condensate or vapor
could create a nuisance or hazard or could be detri-
mental to the operation of regulators, relief valves, or
other equipment.
• The combustion air intake termination of a direct vent
application should not terminate in an area which is
frequently dusty or dirty.
NOTE: In Canada, the Canadian Fuel Gas Code takes
precedence over the preceding termination restrictions.
12"
12"
Non-Direct Vent
Vent/Flue Termination
No Terminations
Above Walkway
12"
4'
4'
Non-Direct Vent
Vent/Flue Termination
Direct Vent
Vent/Flue Termination
12"
10'
3"
Forced Air
Inlet
Other Than
Combustion Air
Termination Intake
Grade or Hi
g
hest
Anticipated
Snow Level
Vent Termination Clearances
CANADIAN VENTING REQUIREMENTS
In Canada, venting must conform to the requirements of
the current CAN/CGA-B149 Installation Code. Use only
CSA listed two or three inch diameter PVC or ABS pipe,
solvent cement, and fittings throughout. Carefully follow
the manufacturers’ instructions for cutting, cleaning, and
solvent cementing PVC and/or ABS.
The vent can be run through an existing unused chimney
provided the space between the vent pipe and the chimney
is insulated and closed with a weather-tight,
corrosion-resistant flashing.
The vent shall not be located:
• Less than 12 inches above the finished grade line.
• Less than 36 inches from any building opening or any
gas service regulator. For gas service regulators in the
Province of Ontario, 72 inches.
• Less than 72 inches from the combustion air intake of
another appliance.
• Directly above a gas utility meter or service regulator.
• Over a walkway unless located 84 inches above grade.
STANDARD FURNACE CONNECTIONS
It is the responsibility of the installer to ensure that the
piping connections to the furnace are secure, airtight, and
adequately supported.
As shipped, attachment “couplings” for vent/flue and com-
bustion air intake pipe connections are provided on the
furnace’s top cover (upflow) or basepan (counterflow). To
use the standard connections, field supplied vent/flue pipe
and combustion air intake pipe (when applicable) should
be secured directly to the furnace at these locations.
Vent/Flue Pipe
Vent/flue pipe can be secured to the vent/flue coupling
using the rubber coupling and worm gear hose clamps
provided with this furnace (see “Standard Connections”
figure). The rubber coupling allows separation of the vent/
flue pipe from the furnace during servicing. NOTE: Do not
use other commercially available “no hub connectors” due
to possible material conflicts. The vent/flue pipe can also
be secured using a PVC or ABS elbow or coupling using
the appropriate glue (see Section IX, Materials and Joining
Methods .
NOTE: For non-direct vent installations, a minimum of one
90° elbow must be installed on the combustion air intake
coupling to guard against inadvertent blockage.
Combustion Air Pipe
Direct Vent Installations
On upflow units secure the combustion air intake pipe
directly to the air intake coupling. On counterflow units
secure the combustion air intake pipe to the air intake
coupling using the rubber coupling and worm gear hose
clamps provided with the unit. The counterflow rubber
coupling allows service removal of air intake piping internal
to the furnace blower compartment. NOTE: Because of
probable material conflicts, do not use other commercially
available “no hub connectors”. The combustion air intake
pipe can also be secured directly to the counterflow unit air
intake pipe coupling.
Non-Direct Vent Installations
A minimum of one 90° elbow must be installed on the
combustion air intake “coupling” to guard against inadvert-