Venting Systems; Locating The Vent Termination - Carrier 59TN6A Installation, Start-Up, Operating And Service And Maintenance Instructions

A furnace shall n otbeconnected
to a chinmey flue serving a
separate appliance designed to burn solid fuel.
Other gas appliances with their own venting system may also use
the abandoned chinmey as a raceway providing it is permitted by
local code, the current edition of the National Fuel Gas Code and
the vent or liner manufacturer's installation instructions. Care must
be taken to prevent the exhaust gases from one appliance from
contaminating the combustion air of other gas appliances.
Do not take combustion air from inside the chinmey when using
ventilated combustion air or single pipe vent option.
These furnaces can be vented as either direct vent furnace,
ventilated combustion air system or non-direct (single pipe) vent
system. Each type of venting system is described below. Common
venting between furnaces or other appliances prohibited.
Materials
U.S.A.
Combustion air and vent pipe, fittings, primers, and solvents nmst
conform to American National Standards Institute (ANSI)
standards and American Society for Testing and Materials (ASTM)
standards. See Table 11 for approved materials for use in the
U.S.A.
Canada
Special Venting Requirements for Installations in Canada
Installation in Canada nmst conform to the requirements of
CAN/CSA B149 code. Vent systems must be composed of pipe,
fittings, cements, and primers listed to ULC $636.
Venting Systems
A factory accessory KGAVT vent termination kit nmst be used for
all direct vent terminations. Termination kits are available for 2-in.
or 3-in. pipe. See Table 10 for available options.
Table 10 - Vent Termination Kit for Direct Vent (2-pipe)
Systems
DIRECT VENT TERMINATION DIAM. OF COMBUS-
(2-PIPE) SYSTEM TION AIR AND VENT
TERMINATION KIT PIPES - IN. (mm)
2-in. (51 mm) Single Penetration of 1, 1-1/2, 2, or 2-1/2
Concentric Vent Kit Wall or Roof (24, 36, 51,64 mm)
3-in. (76 mm) Single Penetration of 2-1/2, 3 or 4
Concentric Vent Kit wall or Roof (64, 76, 102 mm)
2-in. (51 mm) 2-Pipe Termination 1, 1-1/2 or 2
Termination Bracket
Kit System (25, 36, 51 mm)
3-in. (76 mm) 2-Pipe Termination 2-1/2, 3 or 4
Termination Bracket
Kit System (64, 76, 102 mm)
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
nmst terminate together in the same atmospheric pressure zone,
either through the roof or a sidewall (roof termination preferred). A
factory accessory vent termination kit MUST be used in a direct
vent (2-pipe) system. See Fig. 45 for required clearances.
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. See Fig. 46 for required clearances.
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.
Provisions for adequate combustion, ventilation, and dilution air
must be provided in accordance with:
U.S.A. Installations: Section 9.3 NFPA 54/ANSI Z223.1-2009,
Air for Combustion and Ventilation and applicable provisions of
the local building codes.
Canadian Installations: Part 8 of CAN/CSA-BI49.1-10. Venting
Systems and Air Supply for Appliances and all authorities having
jurisdiction.
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 nmst be
supplied as described in the Air For Combustion and Ventilation
Section. Do not use an abandoned chinmey to supply outside air to
the furnace. See Fig. 46 for required clearances.
Provisions for adequate combustion, ventilation, and dilution air
must be provided in accordance with:
U.S.A. Installations: Section 9.3 NFPA 54/ANSI Z223.1-2009, Air
for Combustion and Ventilation and applicable provisions of the
local building codes.
Canadian Installations: Part 8 of CAN/CSA-B149.1-10. Venting
Systems and Air Supply for Appliances and all authorities having
jurisdiction.
A combustion air pipe to the outdoors is not required for a single
pipe vent system. A 12-in. (304 ram) long pipe with a 2-in. (51
ram) tight radius 90 degree elbow is required to be attached to the
combustion air pipe adapter on the furnace. (See Fig. 44.)
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 (direct vent/2-pipe system only) and vent pipe
must terminate outside structure, either through sidewall or roof.
For vent termination clearance, refer to Fig. 45 for Direct
Vent/2-Pipe system and Fig. 46 for Non-direct Vent/I-Pipe
system. For exterior termination arrangements, refer to Fig. 47 for
Direct Vent/2-Pipe system and Fig. 48 for Non- Direct/l-Pipe
system.
Roof termination is preferred since it is less susceptible to damage
or contamination, and it has less visible vent vapors. Sidewall
terminations require sealing or shielding of building surfaces with a
corrosive resistance material due to corrosive combustion products
of vent system.
NOTE: (Direct Vent/2-Pipe system ONLY) A factory accessory
termination kit MUST be used. See Table 10 for available options.
When determining appropriate location for termination, consider
the following guidelines:
1. Comply with all clearance requirements stated in Fig. 45 or
Fig. 46 per application.
2. Termination or termination kit should be positioned where
vent vapors will not damage plants/shrubs or air condi-
tioning 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. Follow all clearances as shown Fig. 45.
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