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

LDVT Series Direct Vent Gas Fireplace
Step 4
Install the 4" (102 mm) flex vent pipe to the appliance col-
lar as described on Page 13. Secure the end with the first
spring 6³⁄₄" (172 mm) from the flex pipe end to the unit.
Step 5
Slide the 7" (178 mm) flex vent pipe over the 4" flex vent
pipe and secure the 7" collar as described on Page 13.
Step 6
Bend the flex pipe horizontal so the bottom of the horizontal
pipe measure 6¹⁄₂" (165mm) from the top of the unit imme-
diately after the 90° formation. (Fig. 27) Be sure to follow
the 1" (25mm) rise in a 24" (610 mm) horizontal run rule.
Step 7
Install the 4" flex then 7" flex to the termination.
Fig. 27 Bend flex vent at 90° so horizontal portion is 6¹⁄₂" (165
mm) off top of unit.

Below Grade Installations

When it is not possible to meet the required vent terminal
clearances of 12" (305 mm) above grade level a snorkel
vent kit is recommended. It allows installation depth of
down to 7" (178 mm) 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.
FP1475
Ensure sidewall venting clearances are observed.
flex 90 bend
If installing a snorkel a minimum 24" (610 mm) vertical rise
4/04 djt
is necessary. The maximum horizontal run with the 24" (610
mm) vertical pipe is 36" (914 mm). This 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" (610 mm).
18
6 " (165mm)
FP1475
1. Establish vent hole through the wall. (Fig. 20)
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. (Fig. 28)
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" (102 mm) clearance below
snorkel. (Fig. 28)
Do not back fill around snorkel. A clearance
of at least 4" (102 mm) must be maintained
between snorkel and the soil.
Zero Clearance
Sleeve
(if required)
Firestop
7" Pipe
24" (610mm)
Minimum*
BG402
Fig. 28 Below grade installation.
If the foundation is recessed, use recess brackets (not BG402a
Top Vent
supplied) for securing lower portion of the snorkel. Fasten
Below grade installation
brackets to wall first, then secure to snorkel with self drilling
1/26/00 djt
#8 x 1/2 sheet metal screws. It will be necessary to extend
vent pipes out as far as protruding wall face. (Fig. 29)
Screws
7TDVSNORK
(Snorkel)
4" (102mm)
Clearance Min.
Window
Well
Gravel
Drain
Foundation Wall
*A minimum of 24" (610mm) ver-
tical 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.
10007852