International comfort products R9MSB0801716 Installation Instructions Manual page 42

INSTALLATION INSTRUCTIONS
For clearance distances when vent termination is located more than 6 ft. (2 M) away from an inside corner, refer to the
appropriate Direct Vent or Non−Direct Vent Clearance Table.
Clearance description when termination is at least 3 ft. (1 M) away and not more than 6 ft. (2 M) away from an inside
corner.
Clearance above grade, veranda, porch, deck, balcony or anticipated snow level
Clearance to a permanently closed window on either Wall A or Wall B
Vertical clearance to a soffitt located above the vent termination within a horizontal distance of 2 ft. (61 cm)
from the centerline of the vent termination
Clearance to a ventilation exhaust (including HRV/ERV) on either Wall A or Wall B
Clearance above paved sidewalk or paved driveway located on public property
Clearance under a veranda, porch, deck, or balcony
No operable windows, doors or intakes of any type are permitted on Wall B between the vent termination and the inside
corner when the vent termination is at least 3 ft. (1 M) away and not more than 6 ft. (2 M) away from an inside corner.
The following items on Wall A must be located at least 3 ft. (1 M) away from the inside corner when a vent termination is
located on Wall B and the vent termination is at least 3 ft. (1 M) away or not more than 6 ft. (2 M) away from an inside
corner.
A window or door that may be opened
The centerline extended above electrical meter or gas service regulator assembly
A service regulator vent outlet
The centerline of a dryer or water heater vent, or other appliance's vent intake
A non−mechanical air supply inlet
Clearance distances shown for Wall A are measured horizontally from the exit of the termination on Wall B to the closest
edge of the item shown below.
Clearance to a mechanical air supply (including HRV/ERV) inlet unless termination is 3 ft. (1 M) above the
horizontal line of the intake
For clearance distances from a vent termination to the outside corner of the wall, refer to the appropriate Direct Vent or
Non−Direct Vent Clearance Table
*N.P. = Not Permitted
*N/A = Not Applicable
Direct Vent / 2-Pipe System
Direct vent (2−pipe) vent and combustion air pipes must
terminate outside the structure. See Figure 52 for references to
vent clearances required by National code authorities.
Allowable vent and combustion air terminations are shown in
Figure 54.
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
ventilation, and dilution air must be provided in
accordance with:
U.S.A. Installations:
Current edition of
NFPA 54/ANSI Z223.1 1, Air for Combustion and
Ventilation and applicable provisions of the local
building codes.
Canadian Installations:
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 53 for references to vent
clearances required by National code authorities. Allowable
vent terminations are shown in Figure 55 The combustion air
42
for adequate combustion,
Section 9.3
Part 8 of
Current edition of
Specifications subject to change without notice.
pipe terminates in a well−ventilated attic or crawl space. Follow
the clearances as shown in Figure 57.
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 53 for references to vent
clearances required by National code authorities. Allowable
vent terminations are shown in Figure 55.
A combustion inlet 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 56. 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.
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
manufacturer's requirements in these instructions are adhered
Gas Furnace: R9MSB
12−in. (305 mm)
12−in. (305 mm)
6 ft. (2 M)
12−in. (305 mm)
7 ft. (2.1 M)
N.P.*
10 ft. (3 M)
all other Code and
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