Vermont Casting 2466 - Manual (Page 17)

17
Dutchwest Direct Vent / Natural Vent Gas Heater
30001935
Vent Termination Below Grade
Install Snorkel Kit #7FSDVSKS when it is not possible
to meet the required vent termination clearances of 12”
(305mm) above grade level. The snorkel kit will allow
installation depth of down to 7” (178mm) below grade
level. The seven inches is measured from the center of
the horizontal 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” (305mm)
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 14-
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
provided.
6. Level the soil to maintain a 4” clearance below the
snorkel.
ST218
install snorkel
12/6/99 djt
Waterproof Seal
Around Pipe
Firestop
Window
Well
Drain
Snorkel
Termination
Cap
4” Clearance
Gravel
ST765
Fig. 28 Snorkel kit installation.
ST219
snorkel detail
12/6/99 djt
Recessed Wall
Firestop
Finishing
Collar
7” Pipe
Wall Plate
Sheet Metal
Screws and
Bracket
Wall Screws
and Anchors
Waterproof
Seal Around
Pipe
ST219
Fig. 29 Use extension brackets to mount snorkel against
recessed wall.
If the foundation is recessed, use extension brackets
(not supplied) to fasten the lower portion of the snorkel.
Fasten 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 protrud-
ing wall face. (Fig. 29)
Vertical (Through the Roof)
Vent Assembly
Note that all vertically terminated installations must in-
clude the restrictor plate included with the stove. Refer
to Figure 8, Page 8.
Make certain the vent system conforms to all other
requirements for vertical termination as specified on
Page 8.
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 8 and 10.
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:
CFM System: 9³⁄₈” x 9³⁄₈” (240mm x 240mm)
DuraVent System: 10” x 10” (254mm x 254mm)
4. Plumb any additional opening through the roof or
other construction that may be needed. In all cases,
the opening must provide a minimum of 1” (25mm)
clearance 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,
making certain that the upper flange of the flashing
base is below the shingles. (Fig. 31)