Vertical Through-The-Roof Application - Vermont Castings BLDV300N SC7SB Installation And Operating Instructions Manual

VENTING INSTALLATION
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 21
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 21
Firestop
7" Pipe
24" (610 mm)
Minimum*
BG402a
Do not back fill around snorkel.
BG402a
Top Vent
A clearance of at least 4" must be main-
Below grade installation
tained between the snorkel and the soil.
1/26/00 djt
If the foundation is re-
cessed, 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
Watertight
screws. It will be
Seal Around
PIpe
necessary to ex-
tend vent pipes
out as far as the
Figure 22 -
protruding wall
Snorkel Installation,
face. Figure 22
Recessed Foundation
20306741
Screws
7TDVSNORK
(Snorkel)
4" (102 mm)
Clearance Min.
Window
Well
Gravel
Drain
Foundation Wall
*A minimum of 24" (610 mm) ver-
tical pipe must be installed when
using the 7TDVSNORK Kit.
Figure 21 -
Below Grade Installation
Foundation
Recess
Sheet Metal
Screws
BG401
BG401
Snorkel
2/10/99 djt
VERTICAL THROUGH-THE-ROOF
APPLICATION
This gas fireplace has been approved for:
•
Vertical installations up to 40' (12 m) in height. Up to
a 10' (3 m) horizontal vent run can be installed within
the vent system using a maximum of two 90° elbows.
Figure 23
•
Up to two 45° elbows may be used within the horizontal
run. For each 45° elbow used on the horizontal plane,
the maximum horizontal length must be reduced by
18" (450 mm).
Example: Maximum horizontal length:
No elbows
1 x 45° elbow = 8.5' (2.6 m)
2 x 45° elbows = 7' (2.1 m)
•
A minimum of an 8' (2.5 m) vertical rise is required.
•
Two sets of 45° elbow offsets may be used within the
vertical sections. From 0 to a maximum of 8' (2.5 m) of
vent pipe can be used between elbows. Figure 23
•
7DVCS supports offsets. Figure 27. This application
will require that you first determine the roof pitch and
use the appropriate starter kit. (Refer to Venting Com-
ponents List)
•
The maximum angular variation allowed in the system
is 270°. Figure 24
•
For the minimum height of the vent above the highest
point of penetration through the roof refer to Page 21,
Figure 28.
Max. Height 40' (12 m)
Min. Height 8' (2 m)
Snorkel
Wall
Screws
Figure 23 -
Support Straps for Horizontal Runs
BLDV7 Series Gas Fireplace
= 10' (3 m)
Max. 10' (3 m)
12" (305 mm)
Min.
Support Straps
Every 3' (914 mm)
FP1183
19