Majestic 33LDVT Installation Instructions And Homeowner's Manual page 15

Pipe Straps
Every 3' (914mm)
Fig. 16 Support straps for horizontal runs.
•
The maximum number of 90° elbows per side wall
FP1012
installations is three (3). Top vent max run
1/25/00 djt
•
If a 90° elbow is fitted directly onto the fireplace
flange the maximum horizontal vent run before the
termination or a vertical rise is 36" (914 mm).
If a 90° elbow is used in the horizontal vent run (level
height maintained) the maximum horizontal vent length
is reduced by 36" (914 mm). This does
ply if the 90° elbows are used to increase or redirect a
vertical rise.
Example: According to the chart the maximum
horizontal vent length in a system with a 7.5' (2.3 m)
vertical rise is 20' (6 m) and if a 90° is required in the
horizontal vent it must be reduced to 17' (5.2 m).
In Figure 18, Dimension A plus B must not be greater
than 17' (5.2 m).
Fig. 17 Maximum horizontal vent run.
FP1237
horizontal plane
12/02
10007852
20' (6m)
Pipe
Straps Every
3' (914mm)
Firestop/Zero
Clearance Sleeve
3'
(914mm)
FP1012
Fig. 18 Maximum vent run with elbows.
•
The maximum number of 45° elbows permitted per
installation is six (6). 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"
not ap-
(457 mm). 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°. (Fig. 19)
Example:
Total angular variation = 270°
FP1237
Fig. 19 Maximum number of elbow degrees.
LDVT Series Direct Vent GaS Fireplace
1 x 90° elbow in horizontal plane = 3' (914mm)
Elbow 1 = 90°
Elbow 2 = 45°
4
Elbow 3 = 45°
Elbow 4 = 90°
1 + 2 + 3 + 4 = 270°
3
2
1
FP1238
FP1239
15