Vermont Casting 36CDVTRN - Manual (Page 16)

16
CDV Series Direct Vent Gas Fireplace
20010175
V584-201
Horizontal Run
2/99 djt
10 ft.
(3048 mm)
7 ft. 6 in.
(2286 mm)
7 ft.
(2134 mm)
CFM147
Fig. 23 Maximum vent run with elbows.
90° Elbow = 3 ft.
A + B = 17 ft. (Max.)
1
2
3
4
1 + 2 + 3 + 4 = 270 o
CFM132
Insert Rear Vent Sidewall
2/26/01 sta
CFM132
Fig. 24 Maximum number of elbows.
Example:
Elbow 1 = 90˚
Elbow 2 = 45˚
Elbow 3 = 45˚
Elbow 4 = 90˚
Total angular variation = 270˚
Vertical Sidewall Installation
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 combustible
or noncombustible, cut opening to size. (Fig. 25)
For combustible walls first frame in opening.
Combustible Walls (Fig. 25): Cut a 9³⁄₈”H x 9³⁄₈” W
(240 x 240 mm) hole through the exterior wall and
frame.
Noncombustible Walls (Fig. 25): Hole opening must
be 7.5” (190 mm) in diameter.
VO584-100
Vent Opening
2/99 djt
Vent Opening for Combustible Wall
9³⁄₈”
(240mm)
9³⁄₈”
(240mm)
Fireplace Hearth
Framing Detail
Opening for Noncombustible Wall
7¹⁄₂”
(190mm)
VO584-100
Fig. 25 Locate vent opening on wall.
Maximum
3' (914mm)
CFM142
Venting
2/2/01 sta
CFM142
Fig. 22 Maximum horizontal vent run.
7TCDV90
the horizontal vent it must be reduced to 17’ (5.2 m).
In Figure 23 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°. (Fig. 24)
•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 7TCRVT, plus
Elbow 7TCDV90 must be used in Vertical
Sidewall installations.
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.