20306748
19
MLDV Series Gas Fireplace
VENTING INSTALLATION
9
1
/
2
"
(241 mm
)
9
1
/
2
"
(241 mm
)
7
1
/
2
"
(190 mm
)
Combustible
Wall
Noncombustible
Wall
FP1954
Figure 26 -
Exterior Wall Framing Dimensions for 4" x 6
5
/
8
" or 4" x 7"
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 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
fi
replace (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".
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). Re
fi
ll hole with 12" of coarse gravel leaving
a clearance of approximately 4" below snorkel.
Figure
27
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 27
Figure 27 -
Below Grade Installation
Screws
Minimum
4" Clearance
Ground
Window Well
Gravel
Drain
Foundation Wall
Firestop
12"
Minimum
Figure 28 -
Snorkel Installation, Recessed Foundation
Foundation
Recess
Watertight Seal
Around Pipe
Sheet Metal
Screws
Wall Screws
Snorkel
FP1966
W
ARNING
•
Do not back
fi
ll around snorkel.
•
A clearance of at least 4” must be
maintained between the snorkel and the
soil.
If the foundation is recessed, use recess brackets (not
supplied) for securing lower portion of the snorkel. Fasten
brackets to wall
fi
rst, then secure to snorkel with self drilling
#8 x
1
/
2
sheet metal screws. It will be necessary to extend
vent pipes out as far as the protruding wall face.
Figure 28