Vermont Castings STLDVPNSC Installation And Operating Instructions Manual page 23

VENTING INSTALLATION
A
10'
7'6"
FP2838
Figure 28 -
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"
(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°. Figure 24
1
2
3
4
1 + 2 + 3 + 4 = 270°
Figure 29 -
Maximum Elbow Usage
20306750
Horizontal 90° Elbow =
3' Reduction
A + B = 17' Maximum
1
2
3
4
Designer Series Direct Vent Gas Fireplace
HORIZONTAL WITH VERTICAL RISE
(THROUGH-THE-WALL) APPLICATIONS
B
1. Locate and cut the vent opening in the wall. For
7'
combustible walls fi rst frame in opening.
Combustible Interior Walls: Cut a 12
hole through the interior wall.
Combustible Exterior Walls: Cut a 10
square hole through the exterior wall frame. Figure 25
Noncombustible Walls: Hole opening should be 8
(216 mm) in diameter.
2. The center of the hole should line up with the center line
of the horizontal rigid vent pipe end. Allow 1/4" minimum
rise per foot. Figure 30
Vent Opening for Combustible Walls
(267 mm) Min.
10 1 ⁄ "
2
(267 mm)
Min.
Fireplace Hearth
Figure 30 -
Locate vent opening on wall
You may use a reducer from 5" x 8" to
4" x 6
vertical rise applications. ONLY use
framing instructions below when using
4" x 6
If the reducer is installed at the rear of the
unit, you must immediately follow with a 90
elbow for a vertical rise before continuing
with any horizontal run. There is a minimum
total height of 7 feet from the fi replace fl oor
to the last section of pipe before horizontal
run. Refer to graph on Page 19.
NOTE: #1222DA reducer must be used when 4 x 6
venting is preferred. #7TDVP58 reducer must be used
FP2307
with 4" x 7" venting is preferred. Reducer must be
installed directly onto unit at the fi repalce collar before
vertical rise.
10Z\x"
Framing Detail
Opening for Noncombustible Wall
8Z\x"
(216 mm)
Fireplace Hearth
5 ⁄
" or 4" x 7" for horizontal with
8
5 ⁄ " or 4" x 7" venting.
8
1 ⁄ "H x 10 1 ⁄ " W
2 2
1 ⁄ "H x 10 1 ⁄ "W
2 2
1 ⁄ "
2
FP2293
5 ⁄ "
8
23