Below Grade Installation - Monessen Hearth BDV300 Instruction Manual

VeNtING INstAllAtIoN
A: 10'
90° Elbows = 3'
A + B = 17' Maximum
7'6"
Figure 24 -
FP1959
Maximum Vent Run with Elbows
1 +  + 3 + 4 = 70°
1
2
3
4
Example: Elbow 1
Elbow 
Elbow 3
Elbow 4
Total Angular Variation
Figure 25 -
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.
54D0700
B: 7'
1
FP1959
max run w/elbows
2
3
4
FP1180
= 90°
= 45°
= 45°
= 90°
= 70°
BDV Series Direct Vent Gas Fireplace
If installing a snorkel, a minimum 4" vertical rise is neces-
sary. The maximum horizontal run with the 4" 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 4".
1. Establish vent hole through the wall. Page 18, Figure
16
. 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
26
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 4" and 7" 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 26
Firestop
4"
Minimum
FP1965
FP1965
If the foundation is recessed, use recess brackets (not
below grade install
supplied) for securing lower portion of the snorkel. Fasten
brackets to wall first, then secure to snorkel with self drill-
ing #8 x 1/ sheet metal screws. It will be necessary to
extend vent pipes out as far as the protruding wall face.
Figure 27
Screws
Minimum 4"
Clearance
Ground
Window
Well
Gravel
Drain
Foundation Wall
Figure 26 -

Below Grade Installation

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