INSTALLATION INSTRUCTIONS
Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE
40
440 01 4001 05
Specifications subject to change without notice.
Figure 43
Vent Coupling and Adapter with
Gaskets
Attach gaskets to vent pipe and combustion air adapters
A13074
Vent Coupling and Adapter
Figure 44
Vent Pipe Flush with Adaptor
VENT PIPE ADAPTER WITH GASKET INSTALLED ON FURNACE.
VENT PIPE IS CUT FLUSH WITH TOP OF ADAPTER. PRIME AND
CEMENT VENT PIPE TO ADAPTER. ALLOW TO DRY BEFORE IN-
STALLING VENT COUPLING.
A13076A
Figure 45
Vent Pipe Flush Showing Coupling
ALIGN NOTCHES IN VENT PIPE COUPLING OVER STAND
−
OFF ON ADAPTER. TORQUE LOWER CLAMP 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 60
for Direct Vent/2
−
Pipe system and
Figure 61
for Ventilated Combustion Air/Non
−
direct
Vent/1
−
Pipe system. For exterior termination arrangements,
refer to
Figure 60
for Direct Vent/2
−
Pipe system and
Figure 61
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 often preferred since it is less susceptible to
damage or contamination, is usually located away from
adjacent structures, is less prone to icing conditions, and 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 sup-
ported by EITHER the Direct Vent Termination Kit
shown in
Table 12
or by field-supplied brackets or
supports fastened to the structure.
When determining appropriate location for termination, consider
the following guidelines:
1. Comply with all clearance requirements stated in
Figure 60
or
Figure 61
per application.
2. Termination or termination kit should be positioned where
vent vapors will not damage plants/shrubs or air
conditioning equipment.
3. Termination or termination kit should be positioned so
that it will not be affected by wind eddy, such as inside
building corners, nor 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.
Direct Vent / 2
−
Pipe System
Direct vent (2
−
pipe) vent and combustion air pipes must
terminate outside the structure. See
Figure 60
for references to
vent clearances required by National code authorities.
Allowable vent and combustion air terminations are shown in
Figure 49
.
