Page 22
1
In accordance with the current CSA B149.1 Natural Gas and Propane Installation Code.
2
In accordance with the current ANSI Z223.1 / NFPA 54 National Fuel Gas Code.
† A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family
dwellings and serves both dwellings.
Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor.
* Clearance in accordance with local installation codes and the requirements of the gas supplier.
In addition to the clearances specified, the following items shall be accounted for during
installation:
• Do not terminate near soffit vents or crawl space or other area where condensate or
vapor could create a nuisance hazard or cause property damage.
• Do not locate the exhaust vent terminal where condensate or vapor could cause damage
or could be detrimental to the operation of regulators, relief valves, or other equipment.
• Do not locate the exhaust vent terminal over public area or walkways where condensate
or vapor can cause nuisance or hazard.
• Do not locate the vent terminal in proximity to plants/shrubs.
• The vent and air intake shall terminate a minimum of 12" (30.5 cm) above expected
snowfall level to prevent blockage.
CAUTION
Never install air intake terminal above vent (exhaust) terminal.
††
SECTION IV: INSTALLATION
Table 7:
Power Vent Terminal Clearances
Canadian Installations
1
US Installations
2
A = Clearance above grade, veranda,
porch, deck, or balcony
12 inches (30 cm)
12 inches (30 cm)
B = Clearance to window or door that
may be opened
6 inches (15cm) for appliances
≤
10,000 Btuh
(3kW), 12 inches (30 cm) for appliances > 10,000
Btuh (3kW) and
≤
100,000 Btuh (30kW), 36 inches
(91cm) for appliances > 100,000 Btuh (30kW)
4 feet (1.2 m) below or to side
of opening; 1 foot (300 mm)
above opening
C = Clearance to permanently closed window
*
*
D = Vertical clearance to ventilated
soffit located above the terminal within
a horizontal distance of 2 feet (61 cm)
from the centerline of the terminal
*
*
E = Clearance to unventilated soffit
*
*
F = Clearance to outside corner
*
*
G = Clearance to inside corner
*
*
H = Clearance to each side of centerline
extended above meter/regulator
assembly
*
*
I = Clearance to service regulator vent
outlet
Above a regulator within 3 ft (91 cm) horizontally of
the vertical center line of the regulator vent outlet to
a maximum vertical distance of 15 ft (4.5 m)
*
J = Clearance to non-mechanical air
supply inlet to building or the
combustion air inlet to any other
appliance
6 inches (15cm) for appliances
≤
10,000 Btuh
(3kW), 12 inches (30 cm) for appliances > 10,000
Btuh (3kW) and
≤
100,000 Btuh (30kW), 36 inches
(91cm) for appliances > 100,000 Btuh (30kW)
4 feet (1.2 m) below or to side
of opening; 1 foot (300 mm)
above opening
K = Clearance to a mechanical air
supply inlet
6 feet (1.83 m)
3 feet (91 cm) above if within
10 feet (3 m) horizontally
L = Clearance above paved sidewalk or
paved driveway located on public
property
7 feet (2.13 m)†
7 feet (2.13 m)
M = Clearance under veranda, porch,
deck, or balcony
12 inches (30 cm)
*
Содержание OT125
Страница 31: ...SECTION IV INSTALLATION Page 31 Figure 24 Piping Diagram One Unit Figure 25 Piping Diagram Two Units ...
Страница 33: ...Page 33 Figure 28 Piping Diagram One Unit with 3 Port Storage Tank SECTION IV INSTALLATION ...
Страница 37: ...Page 37 SECTION IV INSTALLATION Figure 32 Schematic Wiring Diagram ...
