CFDV Series Gas Fireplace
26
20306739
BELOW GRADE INSTALLATION
When it is not possible to meet the required vent terminal
clearances of 12" (305 mm) above grade level, a snor-
kel kit is recommended. 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 the side wall venting clearances are observed.
If venting system is installed below ground, we rec
-
ommend a window well with adequate and proper
drainage to be installed around the termination area.
If installing a snorkel, a minimum 24" (610 mm) vertical
rise is necessary. The maximum horizontal run with the
24" vertical pipe is 36" (914 mm). This measurement is
taken from the collar of the fireplace (or transition elbow)
to the face of the exterior wall. See the Side wall Venting
Graph for extended horizontal run if the vertical exceeds
24" (610 mm).
1. Establish vent hole through the wall.
Page 22, Figure 36
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.
Figure 41
3. Install vent system.
4. Ensure a watertight seal is made around the vent pipe
coming through the wall.
BG401
Snorkel
2/10/99 djt
Snorkel
Wall Screws
Foundation
Recess
Watertight
Seal Around
Pipe
Sheet Metal
Screws
BG401
Figure 48 –
Snorkel installation, recessed foundation
NOTE
Do not back fill around snorkel. A clearance
of at least 4" must be maintained between the
snorkel and the soil.
Figure 47 –
Below Grade Installation
BG402a
Top Vent
Below grade installation
1/26/00 djt
Firestop
7" Pipe
7TDVSNORK
(Snorkel)
4" (102 mm)
Clearance
Min.
Window
Well
Gravel
Drain
BG402a
*A minimum of 24" (610 mm) vertical
pipe must be installed when using the
7TDVSNORK Kit.
24" (610 mm)
Minimum*
Screws
Foundation Wall
Termination Cap with
slip section
SLP Inner Flex
Adapter
SLP Outer Flex
Adapter
Flex Pipe 4” x 48”
Flex Pipe 6-5/8” x 48”
Small Hose Clamp
Large Hose Clamp
Screws
Spacer Spring
Exhaust Pipe
Starting Collar
(on unit)
SLP Flex Starter
Figure 46 -
SLP-HSFTK
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" (102 mm) clearance
below snorkel.
Figure 47
If the foundation is recessed, use recess brackets (not
supplied) for securing lower portion of the snorkel. Fas-
ten 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 the protruding wall face.
Figure 48
VENTING INSTALLATION
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