Bradford White Combi2 TTW C-DW2-TW50T10FBN, Руководство пользователя

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9
Venting continued-
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 12 inches
(30 cm)
4 feet (1.2 m) below or
to the side of opening;
12 inches (30 cm) above
opening
C= Clearance to permanently closed
window *b *b
D= Vertical clearance to ventilated soffit
located above the terminal within a
horizontal distance of 2 feet (61 cm)
from the center line of the terminal *b *b
E= Clearance to unventilated soffit *b *b
F= Clearance to outside corner *b *b
G= Clearance to inside corner *b *b
H= Clearance to each side of center line
extended above meter/regulator
assembly 3 feet (91 cm)
within a height
15 feet (4.6 m)
above the
meter/regulator
assembly
*b
I= Clearance to service regulator vent
outlet or oil tank vent 36 inches
(91 cm)
*b
J= Clearance to non-mechanical air
supply inlet to building or the
combustion air inlet to any other
appliance 12 inches
(30 cm)
4 feet (1.2m) below or to
side of opening; 12
inches (30 cm) above
opening.
K= Clearance to a mechanical air supply
inlet 6 feet
(1.83 m)
3 feet (91 cm) above if
within 10 feet
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 a veranda, porch,
deck, or balcony 12 inches
30 cm) ‡
*b
1
In accordance w it h t he current CAN/CGA-B149 Inst allat ion Codes .
2
In accordance w it h t he current ANSI Z223.1-(Lat est edit ion)/NFPA 54 Nat ional Fuel Gas Code .
† A vent shall not t erminat e direct ly above a sidew alk or paved drivew ay t hat is locat ed bet w een t w o
single-f amily dw ellings and serves bot h dw ellings.
‡ Permit t ed only if a veranda, porch, deck or balcony is f ully open on a minimum of t w o sides beneat h
t he f loor.
* a) A minimum clearance value det ermined by t est ing in accordance w it h sect ion 2.20.
* b) ‘‘ Clearance in accordance w it h local inst allat ion codes and t he requirement s of t he gas supplier’’ .
The vent system must terminate so that proper clearances are maintained as cited
in local codes or the latest edition of the National Fuel Gas Code, ANSI
Z223.1.73.4e and 7.8a, b as follows:
1. Do not terminate near soffit vents or crawl space or other area where condensate
or vapor could create a nuisance or hazard or cause property damage.
2. Do not terminate 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.
3. Do not terminate the exhaust vent terminal over public area or walkways where
condensate or vapor can cause nuisance or hazard.
4. The vent shall terminate a minimum of 12” (25.4 cm) above expected snowfall level
to prevent blockage of vent termination.