Below Grade Installation - Monessen Hearth WDV500 Installation And Operating Instructions Manual

WDV Series Gas Fireplace
A 10'
10'
FP46
Figure 17 -
Maximum Vent Run with Elbows
FP2426
max vent run w/elbows
Example: Elbow 1 =
Elbow  =
Elbow 3 =
Elbow 4 =
Total Angular Variation =
1
2
3
4
1"
Minimum
Figure 18 -
Maximum Elbow Usage
BelOW GraDe InstallatIOns
When it is not possible to meet the required vent terminal
clearances of 1" above grade level, a snorkel kit is recom-
mended. 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.
16
90° Elbow = 3'
A + B = 17' Maximum
90°
45°
45°
90°
70°
FP1180
max bends
If installing a snorkel, a minimum 1" vertical rise is neces-
sary. The maximum horizontal run with the 1" vertical pipe
B 7'
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 1".
1. Establish vent hole through the wall.
. Remove soil to a depth of approximately 16" below base
of snorkel. Install drain pipe. Install window well (not
supplied). Refill hole with 1" of coarse gravel leaving
a clearance of approximately 4" below snorkel. Figure
19
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 19
Firestop
1
2
1"
3
Minimum
4
FP1180
FP134
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 drill-
below grade install
ing #8 x 1/" sheet metal screws. It will be necessary to
extend vent pipes out as far as the protruding wall face.
Figure 20
VentInG InstallatIOn
Screws
Minimum
4" Clearance
Ground
Gravel
Drain
Foundation Wall
Figure 19 -

Below Grade Installation

Window
Well
78D0011