DVB Series Direct Vent Gas Fireplace
54D0701
21
VeNt INstAllAtIoN
hoRIZoNtAl teRMINAtIoN coNFIGuRAtIoN
(Continued)
•
If a 90° elbow is used in the horizontal vent run (level height
maintained) the horizontal vent length is reduced by 36".
Figures
21 and 22.
This does not apply if the 90° elbows are used to
increase or redirect a vertical rise.
Figure 24
Example: According to the vent graph (Page 20) the maximum
horizontal vent length in a system with a 7.5' vertical rise is 20’ (6
m) and if a 90° elbow is required in the horizontal vent it must be
reduced to 17' (5.2 m).
In Figures 23 and 24,
Dimension A plus B must not be greater
than 17' (5.2 m).
•
The maximum number of 45° elbows permitted per side wall
installation is two (2). These elbows can be installed in either
the vertical or horizontal run.
•
For each 45° elbow installed in the horizontal run, the length of
the horizontal run MUST be reduced by 18" (45 cm). This does
not apply if the 45° elbows are installed on the vertical part of
the vent system.
•
The maximum number of elbow degrees in a system is 270°.
Figure 25
90°
7'6"
A
B
FP2098
Horiz run reduce
FP2098
Figure 23 -
Horizontal Run Reduction
A: 10’
B: 7’
7’6”
FP1959
max run w/elbows
FP1959
Figure 24 -
Maximum Vent Run with Elbows
90° Elbows = 3’
A + B = 17’ Maximum
1
2
3
4
1
2
3
4
FP1180
1 + 2 + 3 + 4 = 270°
Example:
Elbow 1 = 90°
Elbow 2 = 45°
Elbow 3 = 45°
Elbow 4 = 90°
Total Angular Variation = 270°
Figure 25 -
Maximum Elbow Usage
