Monessen Hearth 6000DV - Manual (Page 24)

24 42D0200
10'
7'6"
7' A
B
• If a 90° elbow is used in the
horizontal vent run, the horizon-
tal vent length is reduced by 36"
(914 mm). See Figure 28. This
does not apply if the 90° elbows
are used to increase or redirect
a vertical rise. See Figure 29.
Example: According to the vent
graph, Figure 27, the maxi-
mum horizontal vent length in a
system with a 7.5' vertical rise
is 20’ (6m) and if a 90° elbow is
required in the horizontal vent it
must be reduced to 17' (5.2 m).
See page 22 “How to Use Vent
Graph.”
In Figures 28 and 29,
Dimension
A plus B must not be greater than
17' (5.2m).
• 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" (45cm). 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°. See Figure 30.
Figure 29 - Maximum Vent Run with Elbows
Example: Elbow 1 = 90°
Elbow 2 = 45°
Elbow 3 = 45°
Elbow 4 = 90°
Total Angular Variation = 270°
Figure 30 - Maximum Elbow Usage
VENT INSTALLATION
A + B = 17' Maximum
90° Elbow = 3'
1 + 2 + 3 + 4 = 270°
1
2
3
4
1
2
3
4
Figure 28 - Horizontal Run Reduction
90°
7'6"
A
B
40
38
36
34
32
30
28
26
24
22
20
18
16
14
12
10
8
6
4
2
2 4 6 8 10 1214 16 1820
eg: A
Figure 27 - Rear Wall
Venting Graph
Horizontal Dimension From the
Outside Face of the Wall to the
Center of the Fireplace Vent
Flange
HORIZONTAL TERMINATION CONFIGURATION (Continued)