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3. When penetrating through stucco wall, install the
counter flashing. The counter flashing allows stucco,
or other materials, to be finished directly to the sides of
the termination cap. First attach the counter flashing to
the base of the horizontal termination cap with the small
screws provided, then mount entire assembly onto the
wall with the four (4) 2
4. If the optional copper version of the horizontal termination
cap is installed, use an appropriate noncombustible
material to avoid direct contact between the galvanized
and copper metals to prevent possible galvanic reaction.
Step 5. Before connecting your horizontal pipe sections to
the horizontal termination cap, slide the wall thimble cover
over the pipe section nearest the interior side of wall. (Figure
31)
Step 6. Slide the appliance and vent assembly towards the
wall, carefully inserting the pipe section into the cap assembly.
It is important the pipe section extends into the back of the
termination cap with a minimum overlap of 1
the two (2) sheet metal screws provided to secure the pipe
section to the back of the termination cap. The wall thimble
cover will cover the screw heads. (Figure 31)
Sheet Metal
Screws
Wall Thimble Cover
Figure 31
Step 7. Slide the wall thimble cover up to the wall surface
and attach to the wall with screws provided. (Figure 32)
Apply optional decorative brass trim to wall thimble cover
ST983
if desired.
wall thimble cover
Wood Screws
8/07
Figure 32
B984
19
install thimble cover
⁄
" (64 mm) wood screws provided.
1
2
⁄
" (32 mm). Use
1
4
Zero Clearance
Wall Sleeve
Firestop
Vertical Installation
Step 1. Check these installation instructions for required
clearances (air spaces) to combustibles when passing
through ceilings, walls, roofs, enclosures, attic rafters or
other nearby combustible surfaces. Do not pack air spaces
with insulation. Check these instructions for maximum
vertical rise of the venting system and any maximum
horizontal offset limitations.
Step 2. Set the gas appliance in
the desire location. Drop a plumb
bob down from the ceiling to the
position of the appliance flue exit,
and mark the location where the
vent will penetrate the ceiling.
Drill a small hole at this point.
Next, drop a plumb bob from the
roof to the hole previously drilled
in the ceiling, and mark the spot
where the vent will penetrate the
roof. (Figure 33) Determine if
ceiling joists, roof rafters, framing
or other materials will obstruct
the venting system. You may
wish to relocate the appliance or
to offset, to avoid cutting load-
bearing members.
Step 3. To install the round
ceiling support/wall thimble cover
in a flat ceiling, cut a 10" x 10"
(254 x 254 mm) square hole in
the ceiling (unless otherwise
specified) centered on the hole
drilled in Step 2. Frame the hole
as shown in Figure 34.
Step 4. If the twist-lock appliance adapter has not been
installed on the stove, do so now.
Step 5. Assemble the desired pipe sections and elbows
necessary to reach from the appliance adapter up through
the round ceiling cover or support box. Ensure that all pipe
and elbow connections are in their fully twist-locked position.
Mark Location
Mark and Drill
Plumb Bob
Figure 33
ST984
straight up locat
8/07
20012761
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