Marco C 36 HC Installing & Operating Manual page 13

CEILING OPENING CHART
ROOF OPENING CHART
-
i
FIGURE 22
FIRESTOP
PART NO.
792989
792967
792968
CHIMNEY
SET UP
VERTICAL
15"FFSET
3 0 '
OFFSET
PITCH
FLAT
6/12
12/12
18/12
24112
RECOMMENDED
FLASHING
FIGURE
23
10' Rule-if chimney is with~n 10' of the roof peak,
adjacent wall or budding, the top should extend a
min~mum of 2' above the peak. When further than
10' from the roof peak, the tip should extend 2'
higher than the closest point 10' away hor~zontally
(See Figure 23).
ROOF
PITCH
0-6112
6
-
12/12
12
-
1811 2
18
-
2411 2
IMPORTANT If an exposed portion of chimney is greater
than 5 feet above the roof line, use support wires to keep
the chimney secure. The support wires may be attached
to the outer pipe of the chimney with screws, provided the
screws are not long enough to penetrate the inner flue
pipe.
OPENING
FLASHING
PART NO.
793035
793076
793045
793046
OPENING
CHIMNEY PIPE SUPPORT
A
16 112
16112
16112
C
16 112
16 112
16 112
16 1/2
16 112
The chimney pipe support is a double wall, unitized 12"
length of pipe and is designed to relieve the extra weight
load on the fireplace and elbows when high chimneys are
installed.
.
0
16 112
22112
23112
D
16 112
18 112
23 112
2 9 3 4
37
A chimney pipe support is required at the 25 foot level
above the fireplace after a straight chimney run or 25 feet
above a return elbow after a straight chimney run. (See
Figure 22)
RETURN
ELBOW
FIGURE 24