Carrier 59SC2A - Page 56

59SC2A
VENT TERMINAL
OX) AIR SUPPLY INLET
AREA WHERE TERMINAL IS NOT PERMITED
A12326
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.
it cl Descrinti Canadian Installations 1) U.S. Installations *)
em earance eseription (per CAN/CSA B149.1) (per ANSI 2223.1/NFPA 54)
Clearance above grade, veranda, porch, deck, balcony 12 in. (805 mm) .
A or anticipated snow level 18 in. (457 mm) above roof surface. 12 in. (805 mm)
12 in. (805 mm) for appliances >10,000 Btuh (3 kW) 9 in. (229 mm) for appliances >10,000 Btuh (3 kW)
B Clearance to a window or door that may be opened and </=100,000 Btuh ( 30 kW), and </= 50,000 Btuh ( 15 kW),
36 in. (914 mm) for appliances >100,000 Btuh (30 kW) 12 in. (805 mm) for appliances >50,000 Btuh (15kW)
Cc Clearance to a permanently closed window
Vertical clearance to a ventilated soffit located above ao. ; ;
D the terminal within a horizontal distance of 2 feet (61 For clearances not specified in ANSI 2223.1/NFPA 54 or CAN/CSA B149.1, clearances shall be in accordance with local
cm} from the centerline of the terminal installation codes and the requirements of the gas supplier and the manufacturer’s installation instructions.
E Clearance fo an unventilated soffit Manufacturer's Recommendation: See Notes 3-8.
F Clearance to an outside corner
G Clearance to an inside corner
H Clearance to each side of the centerline extended above 3 ft. (.9 M) within 15 ft. (4.6 M) 3 ft. (.9 M) within 15 ft. (4.6 M)
electrical meter or gas service regulator assembly above the meter/regulator assembly. above the meter/regulator assembly.
I Clearance to service regulator vent outlet Sft. (9 M) See Note 4.
_ ve . ou 12 in. (805 mm) for appliances >10,000 Btuh(3 kW) 9 in. (9 mm) for appliances >10,000 Btuh (3 kW)
J Clearance conbuaton ait Tet to any cher spplanes and </= 100,000 Btuh ( 30 kiN, and </= 50,000 Btuh (15 kW),
36 in. (914 mm) for appliances >100,000 Btuh (30 kW) 12 in.(305 mm) for appliances >50,000 Btuh (15kW)
K Clearance to a mechanical air supply inlet 6 ft. (1.8 M) Sft. (9 M)
12 in. (805 mm). See Note 4.
L Clearance under a veranda, porch, deck, or balcony Permitted only if veranda, porch, deck, or balcony is fully open on a
minimum of two sides beneath the floor. Manufacturer's Recommendation: See Notes 3-8.
Clearance to each side of the centerline extended above
M or below vent terminal of the furnace toa dryer or water 12 in. (905 mm) 12 in. (905 mm)
heater vent, or other appliance’s direct vent intake or
exhaust
N Inlet air clearance to a moisture exhaust duct 3 ft. (9 M) 3 ft. (9 M)
(dryer vent, spa exhaust, etc.)
0 Clearance from a plumbing vent stack 3 ft. (9 M) 3 ft. (9 M)
7 ft. (2.1 M) See Note 4
p Clearance above paved sidewalk or paved driveway Vent shall not terminate above a sidewalk or paved driveway that is ee Note *
located on public property located between two single alin and serves both Manufacturers Recommendation: See Notes 3-8.
> greater than, = greater than or equal to, < less than, < less than or equal to
Notes:
In accordance with the current CAN/CSA B149.1, Natural Gas and Propane Installation Code.
In accordance with the current ANSI Z223.1/NFPA 54, National Fuel Gas Code
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.
of the gas supplier and the manufacturer's installation instructions.
For clearances not specified in ANS] Z223.1/NFPA 54 or CAN/CSA B 149.1, clearances shall be in accordance with local installation codes and the requirements
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, and accelerated corrosion of the heat exchangers.
Design and position vent outlets to avoid ice build-up on and moisture damage to surrounding surfaces.
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.
Fig. 45 - Direct Vent Termination Clearance
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Avoid venting under a deck or large overhang. Recirculation could occur and cause performance or system problems. Ice build-up may occur.