Below Grade Installations - Majestic 33BDVT Installation Instructions And Homeowner's Manual

STEP 7
Apply high temperature sealant to 4" (102mm) and 7"
(179mm) collars or the termination one inch away from
crimped end. Guide the vent terminations 4" and 7"
collars into their respective vent pipes. Double check
that the vent pipes overlap the collars by 2" (51mm).
Secure the termination to the wall with screws provided
and caulk around the wall plate to weatherproof. (Fig.
22) As an alternative to screwing the termination
directly to the wall you may also use expanding plugs
or an approved exterior construction adhesive. You
may also attach the termination with screws through the
inner body into the 4" (102mm) vent pipe however for
this method you must extend the 4" (102mm) pipe
approximately 6" (152mm) beyond the outer face of the
wall.
Fig. 22 Apply high temperature sealant to collars or termina-
tions.
Support horizontal pipes every 3' (914mm) with metal
pipe straps. Make sure the horizontal vent pipe is
installed on a level horizontal plane.

Below Grade Installations

When it is not possible to meet the required vent
terminal clearances of 12" (305mm) above grade level
a snorkel vent kit is recommended. It allows installation
depth of down to 7" (178mm) below grade level. The 7"
is measured from the center of the horizontal vent pipe
as it penetrates through the wall.
If venting system is installed below
ground, we recommend a window well
with adequate and proper drainage.
Ensure sidewall venting clearances are observed.
If installing a snorkel a minimum 24" (610mm) vertical
rise is necessary. The maximum horizontal run with the
24" (610mm) vertical pipe is 36" (914mm). This
10003358
BDVT Series Direct Vent GaS Fireplace
measurement is taken from the collar of the fireplace
(or transition elbow) to the face of the exterior wall.
Refer to the Sidewall Vent Graph for extended
horizontal run if the vertical rise exceeds 24" (610mm).
1. Establish vent hole through the wall. (Fig. 17)
2. Remove soil to a depth of approximately 16"
(406mm) below base of snorkel. Install drain pipe.
Install window well (not supplied). Refill hole with 12"
(305mm) of coarse gravel leaving a clearance of
approximately 4" (102mm) below snorkel. (Fig. 23)
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 to maintain a 4" (102mm) clearance
below snorkel. (Fig. 23)
Do not back fill around snorkel. A clear-
ance of at least 4" (102mm) must be
maintained between snorkel and the soil.
Zero Clearance Sleeve
(if required)
Firestop
7" Pipe
FP1243
24" (610mm)
Minimum*
BG402
Fig. 23 Below grade installation.
If the foundation is recessed, 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 screws. It will be
necessary to extend vent pipes out as far as protruding
wall face. (Fig. 24)
Screws
7TDVSNORK
(Snorkel)
4" (102mm)
Clearance
Min.
Window
Well
Gravel
Drain
Foundation Wall
*A minimum of 24" (610mm)
vertical pipe must be installed
when using the 7TDVSNORK
Kit.
*The 22" (559mm) vertical rise
(center to center) of the snorkel
may be included for
calculationof max. horizontal
run.
15