Vent Termination Below Grade - Vermont Castings Radiance RADVTSCCB Installation And Operating Instructions Manual

Radiance Direct Vent Gas Heater
®
6. Use appropriate length of pipe sections – telescopic
or fixed – and install. The sections which go through
the wall are packaged with the starter kit, and can be
cut to suit if necessary.
7. Guide the vent terminations 4" and 6
their respective vent pipes. Double check that the
vent pipes overlap the collars by 2" (51 mm). Secure
the termination to the wall with screws provided and
caulk around the wall plate to weatherproof. As an
alternative to screwing the termination directly to the
wall, you may also use expanding plugs or an ap-
proved exterior construction adhesive.
Fig. 32 Horizontal Length Requirement
NOTE: Support horizontal pipes every 5' (152 cm)
with metal pipe straps.
Cutout On Vinyl
Termination Cap
Fig. 33 Horizontal Termination Cap on a Vinyl Siding Wall
KT1498
cap on sidingT
20306759
⁄ " collars into
5
8
X
FP1182
Vinyl Siding Wall
ASSEMBLY AND INSTALLATION

VENT TERMINATION BELOW GRADE

Install Snorkel Kit #SLP-SNORK when it is not possible to
meet the required vent termination clearances of 12" (305
mm) above grade level. The snorkel kit will allow installation
depth of down to 7" (178 mm) 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. (Figure 35)
NOTE: Be sure to maintain side wall clearances
and vent run restrictions. Refer to Page 7, Figures
3, 4, 5, 6.
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. (Figure 35)
3. Install the vent system as described on Pages 16-18.
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 pro-
vided.
6. Level the soil to maintain a 4" clearance below the
snorkel.
7. If the foundation is recessed, use extension brack-
ets (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
protruding wall face. (Figure 35)
Recessed Wall
Sheet Metal
Screws and
Bracket
Wall Screws
and Anchors
Waterproof Seal
Around Pipe
ST219
Fig. 34 Use extension brackets to mount snorkel against
recessed wall.
ST219
Firestop
Finishing
Collar
7" Pipe
Wall Plate
21