A.O. Smith 104 Series, Инструкция по эксплуатации

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17
FRESH AIR OPENINGS FOR CONFINED SPACES
The following instru F tions shall be used to F al F ulate the size,
number and pla F ement of openings providing fresh air for
F ombustion, ventilation and dilution in F on ¿ ned spa F es The
illustrations shown in this se F tion of the manual are a referen F e
for the openings that provide fresh air into F on ¿ ned spa F es
only DO NOT refer to these illustrations for the purpose of vent
installation See Venting Installation on page 16 for F omplete
venting installation instru F tions
OUTDOOR AIR THROUGH TWO OPENINGS
FIGURE 12.
The F on ¿ ned spa F e shall be provided with two permanent
openings, one F ommen F ing within 12 in F hes (300 mm) of the top
and one F ommen F ing within 12 in F hes (300 mm) of the bottom of
the en F losure The openings shall F ommuni F ate dire F tly with the
outdoors See Figure 12
Ea F h opening shall have a minimum free area of 1 square in F h
per 4,000 Btu/hr (550 mm
2
per kW) of the aggregate input rating
of all applian F es installed in the en F losure Ea F h opening shall
not be less than 100 square in F hes (645 F m 2 )
OUTDOOR AIR THROUGH ONE OPENING
FIGURE 13.
Alternatively a single permanent opening, F ommen F ing
within 12 in F hes (300 mm) of the top of the en F losure,
shall be provided See Figure 12 The water heater shall
have F learan F es of at least 1 in F h (25 mm) from the sides
and ba F k and 6 in F hes (l50 mm) from the front of the
water heater The opening shall dire F tly F ommuni F ate
with the outdoors or shall F ommuni F ate through a verti F al
or horizontal du F t to the outdoors or spa F es that freely
F ommuni F ate with the outdoors and shall have a minimum
free area of the following
1 1 square in F h per 3000 Btu/hr (733 mm 2 per kW) of
the total input rating of all applian F es lo F ated in the
en F losure, and
2 Not less than the sum of the areas of all vent F onne F tors
in the spa F e
OUTDOOR AIR THROUGH TWO HORIZONTAL DUCTS
FIGURE 14.
The F onfined spa F e shall be provided with two permanent
horizontal du F ts, one F ommen F ing within 12 in F hes (300
mm) of the top and one F ommen F ing within 12 in F hes
(300 mm) of the bottom of the en F losure The horizontal
du F ts shall F ommuni F ate dire F tly with the outdoors See
Figure 14
Ea F h du F t opening shall have a minimum free area of
1 square in F h per 2,000 Btu/hr (1100 mm2 per kW) of
the aggregate input rating of all applian F es installed in
the en F losure
When du F ts are used, they shall be of the same F ross
se F tional area as the free area of the openings to whi F h
they F onne F t The minimum dimension of re F tangular air
du F ts shall be not less than 3 in F hes