Bryant 987MB Installation, Start-Up, Operating And Service And Maintenance Instructions page 36

987MB: Installation, Start-up, Operating and Service and Maintenance Instructions
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RECOMMENDED SUPPORT FOR VENT TERMINATIONS
It is recommended that sidewall vent terminations in excess of 24
inches (0.6 M) or rooftop terminations in excess of 36 inches (1 M) in
vertical length be supported by EITHER the Direct Vent Termination
Kit shown in Table 10 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
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.
Direct Vent / 2-Pipe System
Direct vent (2-pipe) vent and combustion air pipes must terminate
outside the structure. See Fig. 41
required by National Code Authorities. Allowable vent and combustion
air terminations are shown in Fig.
Fig. 42 – Combustion Air Pipe Attachment
Fig. 43 – Pipe Vent and Combustion
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
NOTICE
Fig. 44
for references to vent clearances
40.
A
CARBON MONOXIDE POISONING HAZARD
Failure to follow the instructions outlined below for each appliance
being placed into operation could result in carbon monoxide poisoning
or death.
For all venting configurations for this appliance and other gas
appliances placed into operation for this structure, provisions for
adequate combustion, ventilation, and dilution air must be provided in
accordance with:
U.S.A. Installations: Current edition of Section 9.3 NFPA 54/ANSI
or Fig. 45
Z223.1, Air for Combustion and Ventilation and applicable provisions
of the local building codes.
Canadian Installations:
CAN/CSA-B149.1. Venting Systems and Air Supply for Appliances
and all authorities having jurisdiction.
Ventilated Combustion Air
The vent pipe for a Ventilated Combustion Air System must terminate
outdoors. See Fig. 44
National code authorities. Allowable vent terminations are shown in
Fig. 41. The combustion air pipe terminates in a well-ventilated attic or
crawl space. Follow the clearances as shown in
The combustion air pipe cannot terminate in attics or crawl spaces that
use ventilation fans designed to operate in the heating season. If
ventilation fans are present in these areas, the combustion air pipe must
terminate outdoors as a Direct Vent System.
Termination Requirements for
Saskatchewan
The Provinces of Alberta and Saskatchewan require a minimum
unobstructed distance of 4 ft. (1.2 M) from the foundation to the property
line of the adjacent lot for vent termination of any appliance with an
input over 35,000 BTUh. If there is less than 4 ft. (1.2 M) of
unobstructed distance to the property line of the adjacent lot, no type of
vent termination is permitted for appliances with inputs greater than
35,000 BTUh.
There are no additional restrictions on unobstructed distances greater
than 8 ft. (2.4 M). All single, two-pipe and concentric vents may be used,
providing all other Code and manufacturer's requirements in these
instructions are adhered to. Refer to the appropriate Vent Termination
section above for locating the vent termination
The concentric vent kit currently cannot be modified to attach an elbow
to the vent portion of the rain cap. A tee attached to the rain cap could
potentially direct the flue gas plume toward the intake air stream and
contaminate the incoming combustion air for the furnace.
Refer to Fig. 49
Saskatchewan.
A13406
If the unobstructed distance from the foundation to the property line of
the adjacent lot is no less than 4 ft. (1.2 M) and no greater than 8 ft. (2.4
M), it will be necessary to re-direct the flue gas plume. In this situation, a
concentric vent kit cannot be used. A 2-pipe termination (or single pipe
termination when permitted with ventilated combustion air applications)
that re-directs the flue gas away by use of an elbow or tee, certified to
ULC S636 from the adjacent property line must be used, see
A96128
36
WARNING
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Current edition
For references to vent clearances required by
Fig.
the Provinces of Alberta and
for terminations approved for use in Alberta and
of Part 8 of
43.
Fig. 49.