Below Grade Installation - Vermont Castings STLDVNSCSB Installation And Operating Instructions Manual

Designer Series Direct Vent Gas Fireplace
1. Locate and cut the vent opening in the wall. For com-
bustible walls first frame in opening.
Combustible Interior Walls: Cut a 11
hole through the interior wall.
Combustible Exterior Walls: Cut a 9
square hole through the exterior wall frame. Figure 31
Noncombustible Walls: Hole opening should be 7
(190 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 31
Vent Opening for Combustible Walls
9 ⁄ "
1
2
(241 mm) Min.
9 ⁄ "
1
2
(241 mm)
Min.
Fireplace Hearth
Opening for Noncombustible Wall
7 ⁄ "
1
2
(190 mm)
Fireplace Hearth
Figure 31 -
Locate vent opening on wall
BELOW GRADE INSTALLATIONS
When it is not possible to meet the required vent terminal
VO584-100
clearances of 12" above grade level, a snorkel kit is recom-
Vent Opening
mended. It allows installation depth down to 7" (178 mm)
2/99 djt
below grade level. The 7" (178 mm) is measured from the
center of the horizontal vent pipe as it penetrates through
the wall.
Ensure that sidewall venting clearances are observed.
If venting system is installed below ground, we recom-
mend a window well with adequate and proper drainage
to be installed around the termination area.
If installing a snorkel, a minimum 24" vertical rise is nec-
essary. The maximum horizontal run with the 24" vertical
pipe is 36". This measurement is taken from the collar of
the fireplace (or transition elbow) to the face of the exterior
wall. Refer to the Sidewall Venting Graph for extended
horizontal run if the vertical exceeds 24".
24
⁄ "H x 9 ⁄ " W
1 1
2 2
⁄ "H x 9 ⁄ "W
1 1
2 2
⁄ "
1
2
Framing Detail
FP2293
1. Establish vent hole through the wall.
2. Remove soil to a depth of approximately 16" below base
of snorkel. Install drain pipe. Install window well (not
supplied). Refill hole with 12" of coarse gravel leaving a
clearance of approximately 4" below snorkel. Figure 32
3. Install vent system.
4. Ensure a watertight seal is made around the vent pipe
coming through the wall.
5. Apply high temperature sealant caulking (supplied)
around the 5" and 8" snorkel collars.
6. Slide the snorkel into the vent pipes and secure to the
wall.
7. Level the soil so as to maintain a 4" clearance below
snorkel. Figure 32
Firestop
24"
Minimum
FP1965
Figure 32 -
FP1965

Below Grade Installation

below grade install
If the foundation
is recessed, use
recess brackets
(not supplied) for
securing lower por-
Foundation
tion of the snorkel.
Recess
Fasten brackets
to wall first, then
secure to snorkel
with self drilling #8
Watertight Seal
x 1/2 sheet metal
Around Pipe
screws. It will be
necessary to extend
vent pipes out as
Figure 33 -
far as the protrud-
Snorkel Installation,
ing wall face. Figure
Recessed Foundation
33
VENTING INSTALLATION
Screws
Minimum
4" Clearance
Ground
Gravel
Drain
Foundation Wall
Wall
Screws
Sheet
Metal
Screws
FP1966
FP1966
snorkel
20306750
Window
Well
Snorkel