Installing Your Double-Wall Chimney System; Firestopspacers - Marco C 36 HC Installing & Operating Manual

JSTALLING YOUR DOUBLE-
/ALL CHIMNEY SYSTEM
ch double-wall chimney section consists of an outer
)e, flue pipe and single-piece wire spacer. The pipe sec-
ns are not unitized and must be assembled in-
pendently as chimney is installed.
'EP
1:
When Starting the chimney directly on the fire-
ice, install the inner pipe section by fitting the male
d into the inner fireplace starting collar. Make sure
5
male end is fully inserted to lock into the lances
igure 17).
-
INNER PIPE
OUTER FIREPLACE
TEP
2:
Fit the outer galvanized pipe with spacer in place
ver the outer fireplace starting collar located at the top-
enter of the fireplace unit.
lotate the outer pipe to align the slots to the wire spacer
~cks. The wire spacer must protrude through the outer
~ipe slots.
FIRESTOP SPACERS:
I
Firestop spacers are required at each point where the
chimney penetrates a floor or ceiling joist space. Their pur-
pose is twofold: they establish and maintain the requireQ
.
,
clearance between the chimney and combustible.
.
materials, and they provide complete separation from one
floor space to another floor or attic space, as required by
I
f
most codes. When penetrating a floor or ceiling at an
angle, either the IS0 or 30° firestop must be used.
1
i
I
I
ROOM ABOVE
FIGURE 18
FIGURE
SPACER
:ontinue to assemble chimney sections as outlined above,
If the pipe passes through a framed opening between
iaking sure that both inner and outer sections are lock-
floors, install a firestop spacer to the bottom of the joists
h d together. Stop assembly before reaching the ceiling and
(Figure 18). When pipe passes into the attic space, install
over exposed pipe end.
the firestop spacer on the top of the joists (Figure 19) and
secure with sheet metal screws or nails.
;TEP
3:
On the ceiling directly above the center of the
1
-
ouble-wall pipe, lay out a 161/2-inch square hole (use
STEP 4: Determine the location of the hole to be cut in th(_:'
dumb bob) and cut out for chimney exit (Figure 6).
roof. The roof hole cut-out depends on the pitch of the roof,
so refer to the chart on Figure 22, Page 11.