Below Grade Installation - Vermont Castings WDV500NTSCSB Installation And Operating Instructions Manual

For models purchased after 4/16/15, please see addendum.
WDV Series Gas Fireplace
Example: Elbow 1 =
Elbow 2 =
Elbow 3 =
Elbow 4 =
Total Angular Variation =
1
2
3
4
12"
Minimum
Figure 17 -
Maximum Elbow Usage
BELOW GRADE INSTALLATIONS
When it is not possible to meet the required vent terminal
clearances of 12" above grade level, a snorkel kit is rec-
ommended. It allows installation depth down to 7" (178
mm) 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 12" vertical rise is neces-
sary. The maximum horizontal run with the 12" vertical pipe
is 36". This measurement is taken from the collar of the
fireplace (or transition elbow) to the face of the exterior wall.
See the Sidewall Venting Graph for extended horizontal
run if the vertical exceeds 12".
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
18
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.
16
90°
45°
45°
90°
270°
FP1180
FP1180
max bends
VENTING INSTALLATION
7. Level the soil so as to maintain a 4" clearance below
snorkel. Figure 18
Screws
Firestop
1
2
3
12"
4
Minimum
Figure 18 -

Below Grade Installation

FP2134
If the foundation is recessed, use recess brackets (not
supplied) for securing lower portion of the snorkel. Fasten
FP2134
brackets to wall first, then secure to snorkel with self drilling
below grade install
#8 x 1/2" sheet metal screws. It will be necessary to extend
vent pipes out as far as the protruding wall face. Figure 19
Foundation
Recess
Watertight Seal
Around Pipe
Figure 19 -
Snorkel Installation, Recessed Foundation
• Do not back fill around snorkel.
FP1966
• A clearance of at least 4" must be
snorkel
maintained between the snorkel
and the soil.
Minimum
4" Clearance
Ground
Window
Well
Gravel
Drain
Foundation Wall
Snorkel
Wall Screws
Sheet Metal
Screws
20306744