Installation Manual

42 440 01 4800 02
Specifications subject to change without notice.
A12220
Fig. 45 -- Sample Inlet Air Pipe Connection for Polypr opylene
Venting Systems
A13406
Fig. 46 -- Combustion Air Pipe Attachment
A
A96128
Fig. 47 -- Pipe Vent and Combustion
RECOMMENDED SUPPORT FOR
VENT TERMINATIONS
It is recommended that sidewall vent terminations in excess of
24 inches (.6 M) or rooftop terminations in excess of 36 inches
(1 M) in vertical length be supported by EITHER the Direct
Vent Termination Kit shown in Table 12 or by field--supplied
brackets or supports fastened to the structure.
NOTICE
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 adequate combustion, ventilation, and dilution air must be
provided in accordance with:
USA Installations: Section 9.3 current edition of NFPA
54/ANSI Z223.1 Air for Combustion and Ventilation and
applicable provisions of the local building codes.
Canadian Installations: Part 8 of current edition of
CAN/CSA-- B149.1. Venting Systems and Air Supply for
Appliances and all authorities having jurisdiction.
!
WARNING
Ventilated Combustion Air
The vent pipe for a Ventilated Combustion Air System must
terminate outdoors. See Fig. 43 for references to vent clearances
required by National code authorities. Allowable vent terminations
are shown in Fig. 41. The combustion air pipe terminates in a
well--ventilated attic or crawl space. Follow the clearances as
shown in Fig. 50.
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 Fig. 43 for references to vent clearances
required by National Code authorities. Allowable vent
terminations are shown in Fig. 41.
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. 49. This short inlet air pipe
helps to 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.
Termination Requirements for the Provinces of Alberta and
Saskatchewan
The Provinces of Alberta and Saskatchewan require a minimum
unobstructed distance of 4 ft. (1.2 M) 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.
(1.2 M) 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. (2.4 M). All single, two-pipe and concentric vents
may be used, providing all other Code and manufacturer’s
requirements in these instructions are adhered to. Refer to the
appropriate Vent Termination section above for locating the vent
termination