Carrier 59SP6A Installation, Start-Up, Operating, Service And Maintenance Instructions page 37

59SP6A: Installation, Start-up, Operating, Service and Maintenance Instructions
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. See
references to vent clearances required by National code authorities.
A combustion air pipe to the outdoors is not required for a single-pipe
vent system. A 12-in. (304 mm) long pipe with a 2-in. (51 mm) tight
radius 90 degree elbow is required to be attached to the combustion air
pipe adapter on the furnace. See
ensure stable combustion, as well as allow for sound attenuation. To aid
sound attenuation, point the inlet air pipe away from occupants. An extra
elbow and/or five feet of pipe may be used to accomplish the sound
attenuation function.
!
OPTIONAL VENTING BELOW THE FURNACE
The venting system may be positioned below the furnace ONLY IF the
factory accessory External Vent Trap Kit is used. The External Vent
Trap Kit is only approved for PVC/ABS DWV venting systems.
CAREFULLY FOLLOW THE INSTRUCTIONS PROVIDED
WITH THE EXTERNAL VENT TRAP KIT FOR LAYING OUT
THE VENTING SYSTEM AND THE DRAIN SYSTEM. The
instructions included with this furnace DO NOT APPLY to vent
systems that are located below the furnace.
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.
For vent termination clearance, references to National codes are shown
in Fig. 43 for Direct Vent/2-Pipe system and
Combustion Air/Non-direct
termination arrangements, refer to
and Fig. 42 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 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 to damage or contamination. The 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
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Fig. 44
Fig. 49. This short inlet air pipe helps to
NOTICE
Fig. 44 for Ventilated
Vent/1-Pipe system. For
Fig. 41 for Direct Vent/2-Pipe system
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
for
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
required by National code authorities. Allowable vent and combustion
air terminations are shown in
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. 42. 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.
Non-Direct Vent / 1-Pipe System
exterior
The vent pipe for a Non Direct Vent (1-pipe) system must terminate
outdoors. See Fig. 44
National Code authorities. Allowable vent terminations are shown in
Fig. 42.
A combustion air inlet pipe to the outdoors is not required for a
Non-Direct (single-pipe) 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 Fig.
combustion, as well as allow for sound attenuation. To aid sound
attenuation, point the inlet air pipe away from occupants. An extra elbow
and/or five feet of pipe may be used to accomplish the sound attenuation
function.
37
Fig. 43 for references to vent clearances
Fig. 41.
for references to vent clearances required by
Fig. 51.
for references to vent clearances required by
49. This short inlet air pipe helps to ensure stable
Fig. 43 or Fig. 44