Vent Termination Below Grade; Vertical (Through The Roof) Vent Assembly - Vermont Castings OXDV30NV Homeowner's Installation And Operating Manual

Oxford Direct Vent / Natural Vent Gas Heater

Vent Termination Below Grade

Install Snorkel Kit #7FSDVSKS when it is not possible to
meet the required vent termination clearances of 12" (305
mm) above grade level. The snorkel kit will allow instal-
lation depth of down to 7" (178 mm) below grade level.
The seven inches is measured from the center of the hori-
zontal vent pipe as it penetrates the wall. If the venting
system is installed below grade, a window well must
be installed with adequate and proper drainage. (Fig.
28)
NOTE: Be sure to maintain side wall clearances and vent
run restrictions. Refer to Figures 3, 4, 7, and 8.
1. Establish the vent hole through the wall.
2. Remove soil to a depth of approximately 16" (406 mm)
below the base of the snorkel. Install a window well
(not supplied). Refill the hole with 12" (305 mm) of
coarse gravel and maintain a clearance of at least 4"
(102 mm) below the snorkel. (Fig. 28)
3. Install the vent system as described on Pages 15 -
17.
4. Be sure to make a watertight joint around the vent pipe
joint at the inside and outside wall joints.
5. Apply high temperature sealant around the inner and
outer snorkel collars. Join the pipes and fasten the
snorkel termination to the wall with the screws provid-
ed.
6. Level the soil to maintain a 4" clearance below the
snorkel.
Snorkel
Termination
Cap
4" Clearance
Gravel
Drain
Window
Well
Fig. 28 Snorkel kit installation.
If the foundation is recessed, use extension brackets (not
supplied) to fasten the lower portion of the snorkel. Fas-
ten the brackets to the wall first, and then fasten to the
snorkel with self-tapping #8 x 1/2" sheet metal screws.
Extend the vent pipes out as far as the protruding wall
face. (Fig. 29)
18
Waterproof Seal
Around Pipe
Firestop
ST1124
ST1124
snorkel
Recessed Wall
Sheet Metal
Screws and
Bracket
Wall Screws
and Anchors
Waterproof
Seal Around
Pipe
Fig. 29 Use extension brackets to mount snorkel against
recessed wall.
Vertical (Through the Roof)
ST219
Vent Assembly
snorkel detail
Note that all vertically terminated installations must in-
12/6/99 djt
clude the restrictor plate included with the stove. Refer to
Figure 8, Page 9.
Make certain the vent system conforms to all other re-
quirements for vertical termination as specified on Page
9.
This installation will require you to first determine the roof
pitch and use the appropriate vent components. Refer to
Figures 8 and 9 on Pages 9 and 11.
1. Locate the final position of the stove, observing all
clearances for both the vent and the stove.
2. Plumb to the center of the inner (4") flue collar from the
ceiling above, and mark that location.
3. cut the opening:
Vermont castings Group System:
9C\," x 9C\," (240 x 240 mm)
DuraVent System: 10" x 10" (254 x 254 mm)
4. Plumb any additional opening through the roof or oth-
er construction that may be needed. In all cases, the
opening must provide a minimum of 1" (25 mm) clear-
ance to the vent pipe.
5. Place the stove in its final position.
6. Install firestop(s) #7DVFS and Attic Insulation Shield
#7DVAIS as needed. (Fig. 30) If there is a room above
ceiling level, a firestop must be installed on both the
bottom and top sides of the ceiling joists. If an attic is
above ceiling level, an attic insulation shield must be
installed.
7. Install the appropriate roof support and flashing, mak-
ing certain that the upper flange of the flashing base is
below the shingles. (Fig. 31)
Firestop
Finishing
Collar
7" Pipe
Wall Plate
ST219
30005123