Napoleon BGD36CFNTR Installation And Operating Instructions Manual page 18

18
BGD36CF TOP OR REAR EXIT VERTICAL TERMINATION
when (H ) > (V )
T T
Simple venting confi gurations
FIGURE 35
See graph to determine the required vertical rise V
required horizontal run H
MAXIMUM
VERTICAL
R I S E I N
FEET
V
T
HORIZONTAL VENT RUN PLUS OFFSET IN FEET
The shaded area within the lines represents acceptable
values for H and V
T T
For vent confi gurations requiring more than two 90° elbow
(top exit) or one 90° elbow (rear exit), the following formulas
apply:
Formula 1: H < 3V
T
Formula 2: H + V
T
Example 7:
90°
V
1
W415-0566 / D / 08.30.07
.
T
.
T
< 40 feet
T
90°
H
V
2
H
1
90°
FIGURE 36
V = 2 ft
1
V = 1 ft
2
V = 1.5 ft
3
V = V
T
H = 6 ft
1
H = 2 ft
2
H = H
R
H = .03(four 90° elbows - 90°)
O
= .03(90 + 90 + 90 + 90 - 90) = 8.1 ft
H = H
T
H + V = 16.1 + 4.5 = 20.6 ft
T T
Formula 1:
Since this formula is not met, this vent confi guration is
unacceptable.
for the
Formula 2:
T
Since only formula 2 is met, this vent confi guration
is unacceptable and a new fi replace location or vent
confi guration will need to be established to satisfy both
formulas.
Example 8:
H
T
H
V = 1.5 ft
1
V = 5 ft
2
V = V
T
H = 1 ft
1
V
H = 1 ft
2
3
H = 10.75 ft
3
2
H = H
R
H = .03(three 90° elbows + one 45° elbow - 90°)
90°
O
= .03(90 + 90 + 90 + 45 - 90) = 6.75 ft
H = H
T
H + V = 19.5 + 6.5 = 26 ft
T T
Formula 1:
From inside the fi rebox, insert the 4" fl ue pipe assembly (pro-
vided) through the rear of the fi rebox. Secure the assembly
to the rear and top of the unit using 4 #8 x ¾ inch Hex Head
Wildrill screws supplied.
Do not overtighten. The gasket needs only to be snug
+ V + V = 2 + 1 + 1.5 = 4.5 ft
1 2 3
+ H = 6 + 2 = 8 ft
1 2
+ H = 8 + 8.1 = 16.1 ft
R O
H < 3V
T T
3V = 3 x 4.5 = 13.5 ft
T
16.1 > 13.5
H + V < 40 feet
T T
20.6 < 40
90°
45°
H
2
V
1
1
90°
+ V = 1.5 + 5 = 6.5 ft
1 2
+ H + H = 1 + 1 + 10.75 = 12.75 ft
1 2 3
+ H = 12.75 + 6.75 = 19.5 ft
R O
H < 3V
T T
3V = 3 x 6.5 = 19.5 ft
T
V
2
H
90°
3
FIGURE 37