15
BDVR Series Direct Vent Gas Fireplace
10003357
1
2
3
4
1 + 2 + 3 + 4 = 270
o
CFM132
Fig. 21 Maximum number of 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" (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
°
. (Fig. 21)
Example:
Elbow 1 = 90˚
Elbow 2 = 45˚
Elbow 3 = 45˚
Elbow 4 = 90˚
Total angular variation = 270˚
•IMPORTANT• Minimum clearance between vent pipes
and combustible materials is one (1”) inch (25 mm) on
bottom, sides and top.
Twist Lock Vent Starter Kit 7TDVSK, plus
Transition Elbow 7TDVRT90 must be
used in Vertical Sidewall installations.
The 4” pipe must be centered inside the
7” pipe coming off the transition elbow.
Canadian & USA Installations:
The venting system must conform with local codes, or
in the absence of local codes, with National Fuel Gas
Code, ANSI Z223.1/NFPA 54 - latest edition, or CSA
B149.1 Installation Code.
Only CFM Corporation venting components specifically
approved and labelled for this fireplace may be used.
Vertical Sidewall Installations
STEP 1
Locate vent opening on the wall. It may be necessary
to first position the fireplace and measure to obtain
hole location. Depending on whether the wall is com-
bustible or noncombustible, cut opening to size. (Fig.
22)
For combustible walls first frame in opening.
Combustible Walls (Fig. 22): Cut a 9
³⁄₈
”H x 9
³⁄₈
” W
(240 x 240mm) hole through the exterior wall and
frame.
Noncombustible Walls (Fig. 22): Hole opening must
be 7.5” (190mm) in diameter.
10 ft.
(3048 mm)
7 ft. 6 in.
(2286 mm)
7 ft.
(2134 mm)
CFM147
Fig. 20 Maximum vent run with elbows.
90
°
Elbow = 3 ft.
A + B = 17 ft. (Max.)
Vent Opening for Combustible Wall
9
³⁄₈
”
(240mm)
9
³⁄₈
”
(240mm)
Fireplace Hearth
Framing Detail
Opening for Noncombustible Wall
7
¹⁄₂
”
(190mm)
VO584-100
Fig. 22 Locate vent opening on wall.
