A.O. Smith 104 Series, Инструкция по эксплуатации

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18
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" (76 2 mm)
AIR FROM OTHER INDOOR SPACES
FIGURE 16.
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 See Figure 16
Ea F h opening shall F ommuni F ate dire F tly with an additional
room(s) of suf ¿F ient volume so that the F ombined volume of all
spa F es meets the F riteria for an Un F on ¿ ned Spa F e
Ea F h opening shall have a minimum free area of 1 square in F h
per 1,000 Btu/hr (2200 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 TWO VERTICAL DUCTS
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 14 for F omplete
venting installation instru F tions
FIGURE 15.
The F on ¿ ned spa F e shall be provided with two permanent verti F al
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 verti F al du F ts shall F ommuni F ate dire F tly with the
outdoors See Figure 15
Ea F h du F t 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