22 69D0023
CDV Series Gas Fireplace
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, Page 20. This
does not apply if the 90° elbows are used to increase
or redirect a vertical rise. See 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
Figure 24 - Maximum Vent Run with Elbows
Example: Elbow 1 = 90°
Elbow 2 = 45°
Elbow 3 = 45°
Elbow 4 = 90°
Total Angular Variation = 270°
Figure 23 - Horizontal Run Reduction
Figure 25 - Maximum Elbow Usage
VENT INSTALLATION
90°
A + B = 17' Maximum
90° Elbow = 3'
1 + 2 + 3 + 4 = 270°
1
2
3
4
1
2
3
4
7'6"
A B
7'6"
10'
7'
A
B
To Next Page
Loading...