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Fig. 51 Through the wall.
Fig. 52 Apply high temperature sealant to collars or termina-
tions.
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When it is not possible to meet the required vent terminal
clearances of 12" (305 mm) above grade level a snorkel
vent kit is recommended. It allows installation depth of
down to 7" (178 mm) below grade level. The 7" is measured
from the center of the horizontal vent pipe as it penetrates
through the wall.
If venting system is installed below ground,
we recommend a window well with adequate
and proper drainage.
Ensure sidewall venting clearances are observed.
If installing a snorkel a minimum 24" (610 mm) vertical rise
is necessary. The maximum horizontal run with the 24" (610
mm) vertical pipe is 36" (914 mm). This measurement is
taken from the collar of the fireplace (or transition elbow)
FP1242
to the face of the exterior wall. Refer to the Sidewall Vent
Graph for extended horizontal run if the vertical rise exceeds
24" (610 mm).
1. Establish vent hole through the wall. (Page 14, Fig. 17)
2. Remove soil to a depth of approximately 16" (406 mm)
below base of snorkel. Install drain pipe. Install window
well (not supplied). Refill hole with 12" (305 mm) of coarse
gravel leaving a clearance of approximately 4" (102 mm)
below snorkel. (Fig. 53)
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 around the 4"
and 7 " snorkel collars.
6. Slide the snorkel into the vent pipes and secure to the
wall.
7. Level the soil to maintain a 4" (102 mm) clearance below
FP1243
snorkel. (Fig. 53)
Do not back fill around snorkel. A clearance
of at least 4" (102 mm) must be maintained
between 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 first, 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 protruding wall face. (Fig. 54)
CDVZ Series Direct Vent Gas Fireplace
Below Grade Installations
25
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