935SA: Installation, Start-up, Operating and Service Maintenance Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
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wall straight and flex, and required fittings (elbows, reducers, increasers,
connectors, adapters) only.
NOTE:
When using polypropylene venting systems, all venting
materials used, including the vent terminations must be from the same
manufacturer.
Venting Systems
.
Direct Vent / 2-Pipe System
In a direct-vent (2-pipe) system, all air for combustion is taken directly
from outdoor atmosphere, and all flue products are discharged to outdoor
atmosphere. Combustion-air and vent pipes must terminate together in
the same atmospheric pressure zone, either through the roof (preferred)
or a sidewall. For references to clearances required by National code
).
Ventilated Combustion Air Systems
In a ventilated combustion air option, the vent terminates and discharges
the flue products directly to the outdoors similar to a direct vent system.
References to clearances required by National code authorities (see
)
All air for combustion is piped directly to the furnace from a space that is
well ventilated with outdoor air (such as an attic or crawl space) and the
space is well isolated from the living space or garage. Combustion air
requirements for this option are the same as the requirements for
providing outside air for combustion for a single pipe vent system. Refer
to the “Air For Combustion and Ventilation” Section.
Non-Direct Vent (1-pipe) System
In a non direct-vent (1-pipe) system, all air for combustion is taken from
the area adjacent to furnace, and all flue products are discharged to
outdoor atmosphere. Air for combustion must be supplied as described
in the Air For Combustion and Ventilation Section. Do not use an
abandoned chimney to supply outside air to the furnace. References to
vent clearances required by National code authorities (see
).
Locating the Vent Termination
General
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 for Direct
Vent/2-Pipe system (see
) and for Ventilated Combustion
Air/Non-direct Vent/1-Pipe system (see
). For exterior
termination arrangements, for Direct Vent/2-Pipe system (see
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 this structure, provisions for
adequate combustion, ventilation, and dilution air must be provided in
accordance with:
Current edition of
Section 9.3 NFPA 54/ANSI Z223.1, Air for
Combustion and Ventilation and applicable provisions of the local
building codes.
NOTICE
!
RECOMMENDED SUPPORT FOR VENT
TERMINATION
It is recommended that sidewall vent terminations of over 24 inches
(0.6 M) in length or rooftop vent terminations of over 36 inches (1 M)
in length be supported by EITHER the factory accessory vent
termination kit or field-supplied brackets or supports attached to the
structure. A factory accessory vent termination kit may be used for
direct vent terminations. Termination kits are available for 2-in. or 3-in.
pipe. For available options (
.)
Table 14 – Vent Termination Kit for Direct Vent (2-pipe) Systems
Vent and Combustion
Air Pipe Diameters
Approved Two-Pipe Termination Fittings
Allowable Concentric
Vent Kit
1 1/2-in.
(38 mm)
2-in.
(51 mm)
2 1/2-in.
(64 mm)
3-in.
(76-mm)
4-in.
(102 mm)
1 1/2-in. (38 mm)
No
Yes
No
No
No
2-in. (51 mm)
2-in. (51 mm)
No
Yes
No
No
No
2-in. (51 mm)
2 1/2-in. (64 mm)
No
No
No
Yes
No
2-in. (51 mm)
3-in. (76 mm)
3-in. (76-mm)
No
No
No
Yes
No
3-in. (76 mm)
4-in. (102 mm)
No
No
No
Yes
Yes
3-in. (76 mm)
NOTICE
!
OPTIONAL CONFIGURATION FOR COMBUSTION
AIR INLET PIPE
In applications where there is a risk of excessive moisture entering the
combustion air inlet pipe, a moisture trap may be added to the inlet pipe
to help prevent moisture from entering the furnace from the combustion
air inlet pipe. (see
)
When sizing venting systems, the equivalent length of the optional inlet
pipe moisture trap must be taken into account.
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
THE INSTRUCTIONS 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.
