Below Grade Installation - Vermont Castings 33CFDV(N/P)(V/I)SB Installation And Operating Instructions Manual

VENTING INSTALLATION
4" Flex Vent Pipe
Spacer Spring
Figure 39 –
Install Spacer Springs
Step 4
Install the 4" (102 mm) fl ex vent pipe to the appliance col-
lar as described on Page 14. Secure the end with the fi rst
spring 6 3 ⁄ " (172 mm) from the fl ex pipe end to the unit.
4
Step 5
Slide the 7" (178 mm) fl ex vent pipe over the 4" fl ex vent
pipe and secure the 7" collar as described on Page 14.
Step 6
Bend the fl ex pipe horizontal so the bottom of the horizon-
tal pipe measure 6 1 ⁄ " (165 mm) from the top of the unit
2
immediately after the 90° formation. Figure 40. Be sure to
follow the 1 ⁄ " (13 mm) rise in a 12" (305 mm) horizontal
2
run rule.
Step 7
Install the 4" fl ex then 7" fl ex to the termination.
FP1475
Figure 40 –
Bend fl ex vent at 90° so horizontal portion is 6
off top of unit
20306739
12"
(305mm)
6"
(152mm)
5"
(127mm)
6 "
(172mm)
FP1474
6 " (165mm)
1 ⁄ " (165 mm)
2

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 fi replace (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). Refi ll 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.
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 41
Firestop
7" Pipe
24" (610 mm)
Minimum*
Figure 41 –
Below Grade Installation
CFDV Series Gas Fireplace
Screws
7TDVSNORK
(Snorkel)
4" (102 mm)
Clearance
Min.
Window
Well
Gravel
Drain
Foundation Wall
*A minimum of 24" (610 mm) vertical
pipe must be installed when using the
7TDVSNORK Kit.
BG402a
23