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WARNING
!
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.
The instructions included with this furnace DO NOT APPLY
to vent systems that are located below the furnace.
CAREFULLY
FOLLOW
PROVIDED WITH THE EXTERNAL VENT TRAP KIT
FOR LAYING OUT THE VENTING SYSTEM AND
THE DRAIN SYSTEM when all or part of the venting
system is placed below the furnace.
Proper configuration of the venting and drain system is critical
when placing all or part of the venting system below the level
of the furnace. VENT GASSES COULD BE RELEASED
FROM THE DRAINAGE SYSTEM if the instructions
provided with the External Vent Trap Kit are not followed.
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.
Special termination requirements may be required in other
Canadian provinces. Refer to the authority having jurisdiction for
clarification and/or additional clearance requirements.
For vent termination clearance, references to National codes are shown
in Fig. 41 for Direct Vent/2- -Pipe system and Fig. 42 for Ventilated
Combustion Air/Non- -direct Vent/1- -Pipe system. For exterior
termination arrangements, refer to Fig. 39 for Direct Vent/2- -Pipe
system and Fig. 40 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 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.
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
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.
When determining appropriate location for termination, consider
the following guidelines:
1. Comply with all clearance requirements stated in Fig. 41 or
Fig. 42 per application.
2. The vent termination must be located at least 3 feet from an
inside corner and follow the clearance distances in the In-
side Corner Termination drawing. See Fig. 45.
THE
INSTRUCTIONS
to damage or contamination. The
3. Termination or termination kit should be positioned where
vent vapors will not damage plants/shrubs, air conditioning
equipment or utility meters.
4. 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.
5. Termination or termination kit should be positioned where it
will not be damaged by or subjected to foreign objects such
as stones, balls, etc.
6. Termination or termination kit should be positioned where
vent vapors are not objectionable.
Fig. 43 - - Sample Inlet Air Pipe Connection for Polypropylene
Direct Vent / 2-Pipe System
Direct vent (2- -pipe) vent and combustion air pipes must terminate
outside the structure. See Fig. 41 For references to vent clearances
required by National code authorities.
combustion air terminations are shown in Fig. 39.
Fig. 44 - - Combustion Air Pipe Attachment
Non-Direct Vent / 1-Pipe System
The vent pipe for a Non Direct Vent (1- -pipe) system must
terminate outdoors. See Fig. 42 for references to vent clearances
required by National Code authorities.
terminations are shown in Fig. 40.
36
Venting Systems
Allowable vent and
Allowable vent
A12220
A13406
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