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INSTALLATION INSTRUCTIONS
Direct Vent / 2- -Pipe System
Direct vent (2--pipe) vent and combustion air pipes must
terminate outside the structure. See Figure 65 for references to
vent clearances required by National code authorities.
Allowable vent and combustion air terminations are shown in
Figure 52.
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.
For all venting configurations for this appliance and
other gas appliances placed into operation for the
structure,
provisions
for
ventilation, and dilution air must be provided in
accordance with:
U.S.A. Installations: Current edition of Section 9.3
NFPA 54/ANSI Z223.1, Air for Combustion and
Ventilation and applicable provisions of the local
building codes.
Canadian Installations: Current edition of Part 8 of
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 Figure 65 for references to vent
clearances required by National code authorities. Allowable
vent terminations are shown in Figure 53. The combustion air
pipe terminates in a well--ventilated attic or crawl space. Follow
the clearances as shown in Figure 63 and Figure 64.
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.
Non- - Direct Vent / 1- - Pipe System
The vent pipe for a Non Direct Vent (1--pipe) system must
terminate outdoors. See Figure 66 for references to vent
clearances required by National code authorities. Allowable
vent terminations are shown in Figure 53.
A combustion air pipe to the outdoors is not required for a
Non--Direct Vent System. A 12--in. long section of pipe with a
tight radius 2--in. (51 mm) 90 degree elbow is required to be
attached to the furnace. See Figure 49 and Figure 51. This
short inlet air pipe helps to ensure inlet air pipe away from
occupants. An extra elbow and/or 5 ft. (1.5 M) of pipe may be
used to accomplish the sound attenuation function.
440 01 4104 07
adequate
combustion,
Specifications subject to change without notice.
Termination Requirements for the
Provinces of Alberta and Saskatchewan
The Provinces of Alberta and Saskatchewan require a
minimum unobstructed distance of 4 ft. (1.2m) 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. (1.2m) 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. (2.4m). All single, two-pipe and concentric
vents
may
be
used,
providing
manufacturer's requirements in these instructions are adhered
to. Refer to the appropriate Vent Termination section above for
locating the vent termination .
If the unobstructed distance from the foundation to the property
line of the adjacent lot is no less than 4 ft. (1.2m) and no
greater than 8 ft. (2.4m), 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) 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 Figure 49 and Figure 51)
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 Figure 49 and Figure 51 for terminations approved for
use in Alberta and Saskatchewan.
Gas Furnace: N9MSB
all
other
Code
and
43
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