International comfort products B Series Installation Instructions Manual page 51

INSTALLATION INSTRUCTIONS
Figure 58 Direct Vent Termination Clearance
NOTE: The following is based upon National codes for gas appliances, and is provided as a reference.
Refer to Local codes which may supersede these standards and/or recommendations.
Item Clearance Description
Clearance above grade, veranda, porch, deck, balcony or
A
anticipated snow level
B Clearance to a window or door that may be opened
C Clearance to a permanently closed window
Vertical clearance to a ventilated soffit located above the
D terminal within a horizontal distance of 2 feet (61 cm) from
the centerline of the terminal
E Clearance to an unventilated soffit
F Clearance to an outside corner
G Clearance to an inside corner
Clearance to each side of the centerline extended above
H
electrical meter or gas service regulator assembly
I Clearance to service regulator vent outlet
Clearance to non—mechanical air supply inlet to building or
J
the combustion air inlet to any other appliance
K Clearance to a mechanical air supply inlet
L Clearance under a veranda, porch, deck, or balcony
Clearance to each side of the centerline extended above or
M below vent terminal of the furnace to a dryer or water heater
vent, or other appliance's vent intake or exhaust
Furnace combustion air intake clearance to a water heater
N
vent, dryer vent or other types of appliance exhausts.
0 Clearance from a plumbing vent stack
Clearance above paved sidewalk or paved driveway located
P
on public property
u greater than, w greater than or equal to, t less than, v less than or equal to
Notes:
1. In accordance with the current CAN/CSA B149.1, Natural Gas and Propane Installation Code.
2. In accordance with the current ANSI Z223.1/NFPA 54, National Fuel Gas Code
3. NOTE: This table is based upon National codes for gas appliances, and are provided as a reference.
Refer to Local codes which may supersede these standards and/or recommendations.
4. For clearances not specified in ANSI Z223.1/NFPA 54 or CAN/CSA B 149.1, clearances shall be in accordance with local installation codes and the requirements of the
gas supplier and the manufacturer's installation instructions.
5. When locating vent terminations, consideration must be given to prevailing winds, location, and other conditions which may cause recirculation of the combustion products
of adjacent vents. Recirculation can cause poor combustion, inlet condensate problems, vent termination icing, and/or accelerated corrosion of the heat exchangers.
6. Design and position vent outlets to avoid ice build­up on and moisture damage to surrounding surfaces.
7. The vent for this appliance shall not terminate:
a. Near soffit vents of crawl space vents or other areas where condensate or vapor could create a nuisance or hazard or property damage; or
b. Where condensate vapor could cause damage or could be detrimental to the operation of regulators, relief valves, or other equipment.
8. Avoid venting under a deck or large overhang. Recirculation could occur and cause performance or system problems. Ice build­up may occur.
440 01 4102 01
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Canadian Installations
(per CAN/CSA B149.1)
12 in. (305 mm)
18 in. (457 mm) above roof surface.
12 in. (305 mm) for appliances >10,000 Btuh (3 kW)
and </=100,000 Btuh ( 30 kW),
36 in. (914 mm) for appliances >100,000 Btuh (30 kW)
For clearances not specified in ANSI Z223.1/NFPA 54 or CAN/CSA B149.1, clearances shall be in accordance with local
installation codes and the requirements of the gas supplier and the manufacturer's installation instructions.
Manufacturer's Recommendation: See Notes 3­8.
3 ft. (.9 M) within 15 ft. (4.6 M)
above the meter/regulator assembly.
3ft. (.9 M)
12 in. (305 mm) for appliances >10,000 Btuh(3 kW)
and </= 100,000 Btuh ( 30 kW),
36 in. (914 mm) for appliances >100,000 Btuh (30 kW)
6 ft. (1.8 M)
12 in. (305 mm).
Permitted only if veranda, porch, deck, or balcony is fully open on a
minimum of two sides beneath the floor.
12 in. (305 mm)
3 ft. (.9 M)
3 ft. (.9 M)
7 ft. (2.1 M)
Vent shall not terminate above a sidewalk or paved driveway that is
located between two single family dwellings and serves both
dwellings.
Specifications subject to change without notice.
Gas Furnace: N9MSB
V
V
U.S. Installations
(per ANSI Z223.1/NFPA 54)
12 in. (305 mm)
9 in. (229 mm) for appliances >10,000 Btuh (3 kW)
and </= 50,000 Btuh ( 15 kW),
12 in. (305 mm) for appliances >50,000 Btuh (15kW)
3 ft. (.9 M) within 15 ft. (4.6 M)
above the meter/regulator assembly.
See Note 4.
9 in. (9 mm) for appliances >10,000 Btuh (3 kW)
and </= 50,000 Btuh (15 kW),
12 in.(305 mm) for appliances >50,000 Btuh (15kW)
3ft. (.9 M)
See Note 4.
Manufacturer's Recommendation: See Notes 3­8.
12 in. (305 mm)
3 ft. (.9 M)
3 ft. (.9 M)
See Note 4.
Manufacturer's Recommendation: See Notes 3­8.
25−24−65−2
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