Installation guide

INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MXT, (F/G)9MXE
440 01 4005 05 43
Specifications subject to change without notice.
Figure 47 Vent Pipe Flush Showing Coupling
ALIGN NOTCHES IN VENT PIPE COUPLING OVER STAND−
OFF ON ADAPTER. TORQUE LOWER CL AMP 15 LB−IN. WHEN
REMAINING VENT PIPE IS INSTALLED, TORQUE UPPER
CL AMP TO 15 LB−IN.
A13076B
Locating the Vent Termination
General
NOTE: Termination Requirements for the Provinces of
Alberta and Saskatchewan are located at the end of this
section.
Combustion−air inlet pipe (Direct Vent/2−Pipe system only) and
vent pipe must terminate outside structure, either through
sidewall or roof.
For vent termination clearance, references to National codes
are shown in Figure 65 for Direct Vent/2−Pipe system and
Figure 66 for Ventilated Combustion Air/Non−direct
Vent/1−Pipe system. For exterior termination arrangements,
refer to Figure 65 for Direct Vent/2−Pipe system and Figure 66
for Ventilated Combustion Air/Non− Direct/1−Pipe system.
Contact Local code authorities for other requirements to and/or
exemptions from the National codes shown in the figures.
Roof termination is the recommended termination location.
Roof terminations provide better performance against
sustained prevailing winds. The roof location is preferred since
the vent and combustion air system is less susceptible to
damage or contamination. The termination is usually located
away from adjacent structures or other obstacles such as
inside corners, windows, doors or other appliances. It is less
prone to icing conditions, and it often has less visible vent
vapors.
Sidewall terminations may require sealing or shielding of
building surfaces with a corrosive resistance material due to the
corrosive properties of combustion products from the vent
system, as well as protection of adjacent structures.
NOTICE
RECOMMENDED SUPPORT FOR VENT TERMINATIONS
It is recommended that side-wall vent terminations in excess
of 24 inches (0.6 M) or rooftop terminations in excess of 36
inches (1.0 M) in vertical length be supported by EITHER the
Direct Vent Termination Kit shown in Table 12 or by field-sup-
plied brackets or supports fastened to the structure.
NOTE: (Direct Vent/2−Pipe system ONLY) Terminate with the
standard termination as shown in Figure 65 or use a
factory−approved accessory termination kit.
When determining appropriate location for termination, consider
the following guidelines:
1. Comply with all clearance requirements stated in
Figure 65 or Figure 66 per application.
2. Termination or termination kit should be positioned where
vent vapors will not damage plants/shrubs, air
conditioning equipment or utility meters.
3. Do not locate termination directly into prevailing winds.
Termination should be positioned so that it will not be
affected by sustained prevailing winds over 30 mph,
wind eddy, such as inside building corners, or by
recirculation of flue gases, airborne leaves, or light snow.
4. Termination or termination kit should be positioned where
it will not be damaged by or subjected to foreign objects
such as stones, balls, etc.
5. Termination or termination kit should be positioned where
vent vapors are not objectionable.
Inside Corner Terminations
Inside corner vent terminations are permitted provided that:
1. Only two exterior walls come together to form an angle of
90 degrees to 135 degrees. There are no other exterior
walls attached to either wall to form an alcove.
2. The clearance distances apply when the vent is at least
3 feet (1 meter) from, but not more than 6 feet (2 meters)
away from an inside corner.
3. For vent terminations located more than 6 feet (2 meters)
from an inside corner, refer to the appropriate Direct Vent
Clearance Table for all two pipe terminations or
Non−Direct Vent Clearance Table for all single pipe
terminations.
4. The clearance distances to items between the vent
termination and the outside corner, refer to the
appropriate Direct Vent Clearance Table for all two pipe
terminations or Non−Direct Vent Clearance Table for all
single pipe terminations.