Majestic 33BDVT Installation Instructions And Homeowner's Manual page 13

Fig. 14 Maximum horizontal vent run.
1 x 90° elbow in horizontal plane = 3' (914mm)
Fig. 15 Maximum vent run with elbows.
•
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" (457mm). 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. 16)
10003358
3'
(914mm)
BDVT Series Direct Vent GaS Fireplace
Example:
Total angular variation = 270°
FP1237
Fig. 16 Maximum number of elbow degrees.
Vertical Sidewall Installations
STEP 1
Locate vent opening on the wall. It may be necessary
to first position the fireplace and measure to obtain
FP1238
hole location. Depending on whether the wall is com-
bustible or noncombustible, cut opening to size. (Fig.
17)
For combustible walls first frame in opening.
Combustible Walls: (Fig. 17) Cut a 9³⁄₈"H x 9³⁄₈"W
(240 x 240mm) hole through the exterior wall and
frame as shown.
Noncombustible Walls: (Fig. 17) Hole opening must
be 7¹⁄₂" (190mm) in diameter.
Vent Opening for Combustible Wall
9³⁄₈"
(240mm)
Fireplace Hearth
Fig. 17 Locate vent opening on wall.
Elbow 1 = 90°
Elbow 2 = 45°
4
Elbow 3 = 45°
Elbow 4 = 90°
1 + 2 + 3 + 4 = 270°
3
2
1
9³⁄₈"
(240mm)
Framing
Detail
Opening for Noncombustible Wall
7¹⁄₂"
(190mm)
FP1239
VO584-100
13