Heat & Glo TIARAI-BK-C Owner's Manual page 13

Step 3.
For installations using a round support box/wall thimble
(check pipe manufacturer's instructions), mark the wall for a
10 in. x 10 in. (254mm x 254mm) square hole. The center
of the square hole should line up with the center line of the
horizontal pipe, as shown in Figure 5.6. Cut and frame the
hole in the exterior wall where the vent will be terminated. If
the wall being penetrated is constructed of non-combustible
material, i.e. masonry block or concrete, a 7 in. (178mm)
diameter hole is acceptable.
CENTER
LINE
Figure 5.6
NOTE:
(1) Installation requires a minimum of 6 in. (152mm)
horizontal run of vent with a 1/4 in. (6mm) rise run towards
the termination. Each 1 ft. (305mm) of horizontal venting
must include a 1/4 in. (6mm) rise. Never allow the vent
to run downward. This could cause high temperatures
and may present the possibility of a house or structure
fire.
(2) The location of the horizontal vent termination on an
exterior wall must meet all local and national building
codes, and must not be easily blocked or obstructed,
see Figure 4.4 on page 9.
(3) For installations requiring a vertical rise on the exterior
of the building, a snorkel kit is available with a 14 in.
(356mm) and a 36 in. (914mm) tall snorkel termination
cap. Follow the same installation procedures as used
for standard horizontal terminations. If the snorkel
termination must be installed below grade (i.e. basement
application), proper drainage must be provided to
prevent water from entering the snorkel termination. Do
not backfill around snorkel termination.
(4) Vertical clearances through a wall require 2 in. (51mm)
off the top of the venting pipe and 1 in. (25mm) off the
sides and bottom.
CENTER OF
HOLE
WALL
CENTER
LINE
THIMBLE
Heat & Glo • TIARA I-C • 7066-100 Rev. D • 12/11
Step 4.
Position the horizontal termination cap in the center of the 10
in. x 10 in. (254mm x 254mm) square hole and run a bead
of non-hardening mastic around its outside edges, so as to
make a seal between it and the wall, attach termination cap
to the exterior wall with the four wood screws provided. The
arrow on the vent cap should be pointing up (Figure 5.7).
HOT HOT
Wall Thimble
Figure 5.7
NOTES:
(1) The four wood screws provided should be replaced with
appropriate fasteners for stucco, brick, concrete, or
other types of sidings.
(2) A termination cap with a built-in vinyl siding standoff is
highly recommended on a building with vinyl siding. The
pilot hole will be 2 in. (51mm) closer to the bottom of the
square than the top. Using a framing square, draw a 14
in. x 14 in. (356mm x 356mm) square around the pilot
hole in the siding. Figure 5.7.
8 in.
(203mm)
7 in.
(178mm)
Figure 5.8
Wood
Screw
7 in.
(178mm)
6 in.
(152mm)
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