Below Grade Installations - Vermont Castings KHLDV400PTSCSB Installation And Operating Instructions Manual

VENTING INSTALLATION
•
For each 45° elbow installed in the horizontal run, the
length of the horizontal run MUST be reduced by 18" (45
cm). This does not apply if the 45° elbows are installed
on the vertical part of the vent system.
•
The maximum number of elbow degrees in a system is
270°. Figure 17
Elbow 1 =
Example:
Elbow 2 =
Elbow 3 =
Elbow 4 =
Total Angular Variation =
1
2
3
4
24"
Minimum
Figure 17 -
Maximum Elbow Usage

BELOW GRADE INSTALLATIONS

When it is not possible to meet the required vent terminal
clearances of 12" above grade level, a snorkel kit is rec-
ommended. It allows installation depth down to 7" (178
mm) below grade level. The 7" (178 mm) is measured
from the center of the horizontal vent pipe as it penetrates
through the wall.
Ensure that sidewall venting clearances are observed.
If venting system is installed below ground, we recom-
mend a window well with adequate and proper drainage
to be installed around the termination area.
If installing a snorkel, a minimum 24" vertical rise is neces-
sary. The maximum horizontal run with the 24" vertical pipe
is 36". This measurement is taken from the collar of the
fi replace (or transition elbow) to the face of the exterior wall.
See the Sidewall Venting Graph for extended horizontal
run if the vertical exceeds 24".
20306742
90°
45°
45°
90°
270°
FP1180
KHLDV Series Gas Fireplace
Screws
Firestop
24"
Minimum
FP2134
Figure 18 -
Below Grade Installation
1. Establish vent hole through the wall.
2. Remove soil to a depth of approximately 16" below base
of snorkel. Install drain pipe. Install window well (not
supplied). Refi ll hole with 12" of coarse gravel leaving
a clearance of approximately 4" below snorkel. Figure
18
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 5" and 8" 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" clearance below
snorkel. Figure 18
If the foundation is recessed, use recess brackets (not
supplied) for securing lower portion of the snorkel. Fasten
brackets to wall fi rst, 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 the protruding wall face. Figure 19.
Minimum
4" Clearance
Ground
Window
Well
Gravel
Drain
Foundation Wall
17