MHSC STLDVNS Installation And Operating Instructions Manual page 23

VeNTING INSTaLLaTIoN
a
10'
7'6"
FP2838
Figure 28 -
Maximum Vent Run with Elbows
FP2838
max vent run
•
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
FP2307
20302381
max elbows
Horizontal 90° Elbow =
3' Reduction
A + B = 17' Maximum
1
2
3
4
hoRIZoNTaL wITh VeRTICaL RISe
(ThRouGh-The-waLL) aPPLICaTIoNS
B
1. Locate and cut the vent opening in the wall. For
7'
combustible walls first frame in opening.
Combustible Interior walls: Cut a 12Z\x"H x 10Z\x" W
hole through the interior wall.
Combustible exterior walls: Cut a 10Z\x"H x 10Z\x"W
square hole through the exterior wall frame. Figure 25
Noncombustible walls: Hole opening should be 8Z\x"
(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.
10Z\x"
(267 mm)
Min.
Fireplace Hearth
Figure 30 -
Locate vent opening on wall
you may use a reducer from 5" x 8" to 4" x
6B\," or 4" x 7" for horizontal with vertical rise
applications. oNLy use framing instructions
below when using 4" x 6B\," or 4" x 7"
venting.
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 fireplace floor
to the last section of pipe before horizontal
run. Refer to graph on Page 19.
NoTe: #1222Da reducer must be used when 4 x 6B\,"
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 firepalce collar before
vertical rise.
Designer Series Direct Vent Gas Fireplace
10Z\x"
Framing Detail
opening for Noncombustible wall
8Z\x"
(216 mm)
Fireplace Hearth
VO584-100
Vent Opening
2/99 djt
FP2293
23